Patent Application
20210333018
The present invention relates to technical fields of thermal power engineering and mechanical manufacturing, and more particularly to a double chambers boiler system with oxygen-enriched combustion.
Coal and petroleum are most important fuels in the world, accounting for above 60% of the global energy consumption. In 2016, the coal consumption in China is 1.887 billion tons of oil equivalent, wherein the electric power industry is the major industry of coal consumption and accounts for about 50% of the coal consumption every year. The consumption of fossil energy is mainly through combustion, and there are two challenges for the consumption of fossil energy. One is the efficiency of energy utilization, and the other is the pollutant emissions. In the boiler field, improving the fuel burnout rate and boiler thermal efficiency, as well as reducing the emission concentrations of NOx, SO2 and CO2, are problems should be solved by the boiler design.
Because of increasing the concentration of the combustion supporting oxygen, the oxygen-enriched combustion can improve the fuel burnout rate and meanwhile enrich CO2 through recirculating the flue gas, which is beneficial to capturing of end CO2 and is a good boiler improvement way. However, the high combustion temperature of the oxygen-enriched combustion facilitates generation of thermal NOx, leading to the greatly increased NOx emission concentration. Meanwhile, because of NOx and SO2, the corrosions of the furnace, heating surface and flue gas pipeline become more severe.
The Chinese patent publication (CN 105605562A) disclosed a flue gas circulation system for an oxygen-enriched combustion boiler, which adjusts the ratio of oxygen to flue gas through adjusting the position of the oxygen injector, so as to realize optimization of efficiency of the oxygen-enriched combustion boiler. However, the emission problem of NOx is not mentioned in the above patent. The Chinese patent publication (CN 105276605A) disclosed a coal-fired boiler and a combustion method thereof. The water vapor is introduced into the main combustion zone of the combustor, so as to generate CO for reducing NOx and reduce the emission concentration of NOx. However, the above method will increase the emission concentration of CO, which indicates the decrease of the burnout rate. The Chinese patent publication (CN 103953921B) disclosed an oxygen-enriched combustion boiler system and an operation method thereof. The denitrification and desulfuration equipment is arranged at the tail flue gas pipeline, so as to avoid the enrichment problem of NOx and SO2 during the circulation process of the flue gas; and the oxygen injection way is adjusted to increase the enrichment concentration of CO2. Through the above method, the problem of NOx and SO2 is controlled at the tail flue gas pipeline. However, the NOx generation problem during the oxygen-enriched combustion process still exists; the work is heavy; and the investment is huge.
In summary, there is a contradiction between improving the combustion efficiency and reducing the emission concentration of NOx for the common oxygen-enriched combustion.
For above technical problems, the present invention provides a double chambers boiler system with oxygen-enriched combustion, comprising a combustion chamber and a heat exchange chamber, wherein pure oxygen is adopted as a combustion supporting gas, so as to simultaneously solve problems of improving a combustion efficiency and reducing an emission concentration of NOx.
Technical solutions of the present invention are described as follows.
A double chambers boiler system with oxygen-enriched combustion comprises a boiler furnace subassembly and a combustion control subassembly, wherein the boiler furnace subassembly comprises a combustion chamber and a heat exchange chamber; the combustion chamber is for oxygen-enriched combustion of fuel, so as to generate high temperature flue gas; the heat exchange chamber is for transferring heat from the high temperature flue gas to a water wall or a boiler water wall pipe; the heat exchange chamber is arranged above the combustion chamber; a high temperature flue gas outlet is arranged between the combustion chamber and the heat exchange chamber; pure oxygen is adopted for supporting combustion; the combustion chamber is able to meet a high temperature resistance requirement for combustion in the pure oxygen; and the heat exchange chamber is able to realize a highly-efficient heat transfer of a boiler.
Preferably, the combustion control subassembly assists feeding of the fuel with CO2 and/or flue gas recirculation and is equipped with a flue gas recirculation tube; according to a combustion effect in the combustion chamber, a ratio of CO2 to flue gas and a ratio of fuel to pure oxygen which is a combustion supporting gas are able to be adjusted; the flue gas recirculation tube is for reusing of the flue gas; the combustion control subassembly comprises a burner, a pure oxygen injector and a fuel injector; the burner is connected to the combustion chamber; and, the pure oxygen injector and the fuel injector are both connected to the burner. The combustion control subassembly adopts CO2 for feeding of the fuel and is equipped with the flue gas recirculation tube, so that a safety of fuel feeding is ensured and a flue gas recirculation ratio is able to be adjusted according to requirements.
Preferably, injection ports are arranged at a middle part of the combustion chamber and on a wall of the combustion chamber; the injection ports are arranged horizontally and symmetrically on a same plane, and 3-6 injection ports are arranged on the same plane; for the wall of the combustion chamber, an inner layer is made of high temperature refractory material, a middle layer is made of thermal insulation material, and an outer layer is made of structural material; and an ash bucket is arranged below the combustion chamber.
Preferably, the heat exchange chamber is intercommunicated with the combustion chamber through the high temperature flue gas outlet; a flue gas outlet of the heat exchange chamber is arranged at top of the heat exchange chamber; a waste heat recovery device is arranged outside the flue gas outlet of the heat exchange chamber; the water wall is an inner wall of the heat exchange chamber; and the boiler water wall pipe is arranged in middle of the heat exchange chamber.
Preferably, an economizer is arranged inside the waste heat recovery device; an end gas outlet is arranged at a tail end of the waste heat recovery device, and the end gas outlet is connected to a pre-heater.
Preferably, in the burner, in order to avoid explosion, primary air and secondary air are separately delivered; the primary air and the secondary air are sprayed into the combustion chamber by the burner; the primary air is air carrying the fuel, and the secondary air is the pure oxygen.
Preferably, a part of or all of the primary air is end gas exhausted from the waste heat recovery device; the end gas exhausted from the waste heat recovery device enters the fuel injector after passing through the pre-heater and processing with flue gas separation, wherein the end gas is induced by a first draught fan; then the primary air carrying the fuel enters the burner; herein, the fuel is fed by a fuel supply equipment;
when a part of the primary air is the end gas exhausted from the waste heat recovery device, the other part of the primary air is CO2; CO2 is induced by a second draught fan; the end gas and CO2 respectively induced by the draught fans enter the fuel injector after passing through the pre-heater; and then the primary air carrying the fuel enters the burner; or
all of the primary air is CO2; CO2 induced by the second draught fan enters the fuel injector after passing through the pre-heater; and then the primary air carrying the fuel enters the burner; and
the secondary air is standard pure oxygen; after passing through the pre-heater, the standard pure oxygen induced by a third draught fan enters the burner through the pure oxygen injector.
Preferably, internal channels of the burner are arranged in structure of concentric circles or parallel channels, comprising an oxygen channel and a fuel channel, wherein: the oxygen channel and the fuel channel are separated from each other; the primary air carrying the fuel is sprayed into the combustion chamber through the fuel channel, and the secondary air enters the combustion chamber through the oxygen channel.
Preferably, the combustion control subassembly further comprises a detector for automatically monitoring concentrations of oxygen and CO2 and a temperature, so that the ratio of CO2 to flue gas and the ratio of fuel to pure oxygen which is the combustion supporting gas are able to be adjusted according to the combustion effect in the combustion chamber.
The present invention has following beneficial technical effects.
(1) According to the present invention, the combustion chamber of the double chambers boiler system with oxygen-enriched combustion meets the high temperature resistance requirement for combustion in the pure oxygen, which realizes the deep burnout of the fuel.
(2) According to the present invention, the double chambers boiler system with oxygen-enriched combustion comprises the separated heat exchange chamber, which realizes the highly-efficient heat transfer of the boiler.
(3) According to the present invention, the double chambers boiler system with oxygen-enriched combustion adopts the pure oxygen for supporting combustion, which prevents N2 from entering the combustion chamber, avoids generation of the thermal NOx, and reduces the emission concentration of NOx.
(4) According to the present invention, the combustion control subassembly of the double chambers boiler system with oxygen-enriched combustion assists feeding of the fuel with CO2 and flue gas recirculation, so that the safety of fuel feeding is ensured and the highly-efficient enrichment of CO2 is realized.
The drawings illustrated herein are for providing further understanding of the present invention and constituting a part of the present invention, but not all of the present invention, which will not improperly limit the present invention.
In figures: 01: boiler furnace subassembly; 02: combustion chamber; 03: heat exchange chamber; 04: burner; 05: injection ports; 06: water wall; 07: wall of combustion chamber; 08: pure oxygen injector; 09: fuel injector; 10: high temperature flue gas outlet; 11: ash bucket; 12: boiler water wall pipe; 13: pre-heater; 14: end gas outlet; 15: flue gas outlet of heat exchange chamber; 16: fuel supply equipment; 17, 18 and 19: draught fans; 20: waste heat recovery device; 21: economizer; 22: combustion control subassembly; 23: flue gas recirculation tube; 24: detector; 201: oxygen channel; and 202: fuel channel.
In order to make objects, technical solutions and advantages of the present invention more understandable and clearer, the present invention will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the examples described herein are merely for explaining the present invention, not for limiting the present invention.
Moreover, replacements, modifications, equivalent methods and solutions, which are made within the spirit and scope of the present invention and defined by claims, are all encompassed in the protection scope of the present invention. In order to make the public better understand the present invention, in the following detailed description of the present invention, some specific details are described. One skilled in the art can fully understand the present invention without the specific details.
As shown in
An ash bucket 11 is arranged below the combustion chamber 02; three injection ports 05 are arranged at a middle part of the combustion chamber 02; and the high temperature flue gas outlet 10 is arranged at top of the combustion chamber 02. The injection ports 05 are arranged horizontally and symmetrically, namely in arrangement of equilateral triangle. For a wall 07 of the combustion chamber 02, an inner layer is made of high temperature refractory material, a middle layer is made of thermal insulation material, and an outer layer is made of structural material.
The heat exchange chamber 03 is intercommunicated with the combustion chamber 02 through the high temperature flue gas outlet 10; an inner wall of the heat exchange chamber 03 is a water wall 06; a boiler water wall pipe 12 is arranged in middle of the heat exchange chamber 03; a flue gas outlet 15 of the heat exchange chamber 03 is arranged at top of the heat exchange chamber 03; a waste heat recovery device 20 is arranged outside the flue gas outlet 15 of the heat exchange chamber 03; an economizer 21 is arranged in middle of the waste heat recovery device 20; an end gas outlet 14 is arranged at a tail end of the waste heat recovery device 20, and the end gas outlet 14 is connected to a pre-heater 13.
In the burner 04, in order to avoid explosion, primary air and secondary air are separately delivered; the primary air and the secondary air are sprayed into the combustion chamber 02 by the burner 04; the primary air is air carrying fuel, and the secondary air is pure oxygen;
a part of the primary air is end gas exhausted from the waste heat recovery device 20; the end gas exhausted from the waste heat recovery device 20 enters the fuel injector 09 after passing through the pre-heater 13 and processing with flue gas separation, wherein the end gas is induced by a draught fan 17; the other part of the primary air is CO2; CO2 induced by a draught fan 18 enters the fuel injector 09 after passing through the pre-heater 13; and then the primary air enters the burner 04 with carrying the fuel of the fuel injector 09; herein, the fuel is fed by a fuel supply equipment 16; and
the secondary air is standard pure oxygen; after passing through the pre-heater 13, the standard pure oxygen induced by a draught fan 19 enters the burner 04 through the pure oxygen injector 08.
As shown in
The combustion control subassembly 22 further comprises a detector 24 for automatically monitoring concentrations of oxygen and CO2 and a temperature, so that a ratio of CO2 to flue gas and a ratio of fuel to pure oxygen which is a combustion supporting gas are able to be adjusted according to a combustion effect.
A double chambers boiler system with oxygen-enriched combustion comprises a boiler furnace subassembly 01 and a combustion control subassembly 22; wherein: the boiler furnace subassembly 01 comprises a combustion chamber 02 and a heat exchange chamber 03; the combustion chamber 02 is a horizontal combustion chamber; the heat exchange chamber 03 is arranged above the horizontal combustion chamber 02; a high temperature flue gas outlet 10 is arranged between the combustion chamber 02 and the heat exchange chamber 03; and, the combustion control subassembly 22 comprises a burner 04, a pure oxygen injector 08 and a fuel injector 09.
An ash bucket 11 is arranged below the combustion chamber 02; three injection ports 05 are arranged at a middle part of the combustion chamber 02; and the high temperature flue gas outlet 10 is arranged at top of the combustion chamber 02. The injection ports 05 are arranged horizontally and symmetrically, namely in arrangement of equilateral triangle. For a wall 07 of the combustion chamber 02, an inner layer is made of high temperature refractory material, a middle layer is made of thermal insulation material, and an outer layer is made of structural material.
The heat exchange chamber 03 is intercommunicated with the combustion chamber 02 through the high temperature flue gas outlet 10; an inner wall of the heat exchange chamber 03 is a water wall 06; a boiler water wall pipe 12 is arranged in middle of the heat exchange chamber 03; a flue gas outlet 15 of the heat exchange chamber 03 is arranged at top of the heat exchange chamber 03; a waste heat recovery device 20 is arranged outside the flue gas outlet 15 of the heat exchange chamber 03; an economizer 21 and a heat exchanger are arranged in middle of the waste heat recovery device 20; an end gas outlet 14 is arranged at a tail end of the waste heat recovery device 20, and the end gas outlet 14 is connected to a pre-heater 13.
In the burner 04, in order to avoid explosion, primary air and secondary air are separately delivered; the primary air and the secondary air are sprayed into the combustion chamber 02 by the burner 04; the primary air is air carrying fuel, and the secondary air is pure oxygen;
all of the primary air is end gas exhausted from the waste heat recovery device 20; the end gas exhausted from the waste heat recovery device 20 enters the fuel injector 09 after passing through the pre-heater 13 and processing with flue gas separation, wherein the end gas is induced by a draught fan 17; and then the primary air enters the burner 04 with carrying the fuel of the fuel injector 09; herein, the fuel is fed by a fuel supply equipment 16; and
the secondary air is standard pure oxygen; after passing through the pre-heater 13, the standard pure oxygen induced by a draught fan 19 enters the burner 04 through the pure oxygen injector 08.
The burner 04 comprises a fuel channel 202 and an oxygen channel 201, wherein: the fuel channel 202 and the oxygen channel 201 are arranged in parallel as shown in
The combustion control subassembly 22 further comprises a detector 24 for automatically monitoring concentrations of oxygen and CO2 and a temperature, so that a ratio of CO2 to flue gas and a ratio of fuel to pure oxygen which is a combustion supporting gas are able to be adjusted according to a combustion effect.
A double chambers boiler system with oxygen-enriched combustion comprises a boiler furnace subassembly 01 and a combustion control subassembly 22; wherein: the boiler furnace subassembly 01 comprises a combustion chamber 02 and a heat exchange chamber 03; the combustion chamber 02, which is a horizontal combustion chamber, is arranged at a lower part of the boiler furnace subassembly 01, and the heat exchange chamber 03 is arranged at an upper part of the boiler furnace subassembly 01; a high temperature flue gas outlet 10 is arranged between the combustion chamber 02 and the heat exchange chamber 03; and, the combustion control subassembly 22 comprises a burner 04, a pure oxygen injector 08 and a fuel injector 09.
An ash bucket 11 is arranged below the combustion chamber 02; four injection ports 05 are arranged at a middle part of the combustion chamber 02; and the high temperature flue gas outlet 10 is arranged at top of the combustion chamber 02. The injection ports 05 are arranged horizontally and symmetrically. For a wall 07 of the combustion chamber 02, an inner layer is made of high temperature refractory material, a middle layer is made of thermal insulation material, and an outer layer is made of structural material.
The heat exchange chamber 03 is intercommunicated with the combustion chamber 02 through the high temperature flue gas outlet 10; an inner wall of the heat exchange chamber 03 is a water wall 06; a boiler water wall pipe 12 is arranged in middle of the heat exchange chamber 03; a flue gas outlet 15 of the heat exchange chamber 03 is arranged at top of the heat exchange chamber 03; a waste heat recovery device 20 is arranged outside the flue gas outlet 15 of the heat exchange chamber 03; an economizer 21 is arranged in middle of the waste heat recovery device 20; an end gas outlet 14 is arranged at a tail end of the waste heat recovery device 20, and the end gas outlet 14 is connected to a pre-heater 13.
In the burner 04, in order to avoid explosion, primary air and secondary air are separately delivered; the primary air and the secondary air are sprayed into the combustion chamber 02 by the burner 04; the primary air is air carrying fuel, and the secondary air is pure oxygen;
all of the primary air is CO2; CO2 induced by a draught fan 18 enters the fuel injector 09 after passing through the pre-heater 13; and then the primary air enters the burner 04 with carrying the fuel of the fuel injector 09; herein, the fuel is fed by a fuel supply equipment 16; and
the secondary air is standard pure oxygen; after passing through the pre-heater 13, the standard pure oxygen induced by a draught fan 19 enters the burner 04 through the pure oxygen injector 08.
The combustion control subassembly 22 further comprises a detector 24 for automatically monitoring concentrations of oxygen and CO2 and a temperature, so that a ratio of CO2 to flue gas and a ratio of fuel to pure oxygen which is a combustion supporting gas are able to be adjusted according to a combustion effect.
A double chambers boiler system with oxygen-enriched combustion comprises a boiler furnace subassembly 01 and a combustion control subassembly 22; wherein: the boiler furnace subassembly 01 comprises a combustion chamber 02 and a heat exchange chamber 03; the combustion chamber 02, which is a horizontal combustion chamber, is arranged at a lower part of the boiler furnace subassembly 01, and the heat exchange chamber 03 is arranged at an upper part of the boiler furnace subassembly 01; a high temperature flue gas outlet 10 is arranged between the combustion chamber 02 and the heat exchange chamber 03; and, the combustion control subassembly 22 comprises a burner 04, a pure oxygen injector 08 and a fuel injector 09.
An ash bucket 11 is arranged below the combustion chamber 02; four injection ports 05 are arranged at a middle part of the combustion chamber 02; and the high temperature flue gas outlet 10 is arranged at top of the combustion chamber 02. The injection ports 05 are arranged horizontally and symmetrically. For a wall 07 of the combustion chamber 02, an inner layer is made of high temperature refractory material, a middle layer is made of thermal insulation material, and an outer layer is made of structural material.
The heat exchange chamber 03 is intercommunicated with the combustion chamber 02 through the high temperature flue gas outlet 10; an inner wall of the heat exchange chamber 03 is a water wall 06; a boiler water wall pipe 12 is arranged in middle of the heat exchange chamber 03; a flue gas outlet 15 of the heat exchange chamber 03 is arranged at top of the heat exchange chamber 03; a waste heat recovery device 20 is arranged outside the flue gas outlet 15 of the heat exchange chamber 03; an economizer 21 and a heat exchanger are arranged in middle of the waste heat recovery device 20; an end gas outlet 14 is arranged at a tail end of the waste heat recovery device 20, and the end gas outlet 14 is connected to a pre-heater 13.
In the burner 04, in order to avoid explosion, primary air and secondary air are separately delivered; the primary air and the secondary air are sprayed into the combustion chamber 02 by the burner 04; the primary air is air carrying fuel, and the secondary air is pure oxygen;
a part of the primary air is end gas exhausted from the waste heat recovery device 20; the end gas exhausted from the waste heat recovery device 20 enters the fuel injector 09 after passing through the pre-heater 13 and processing with flue gas separation, wherein the end gas is induced by a draught fan 17; the other part of the primary air is CO2; CO2 induced by a draught fan 18 enters the fuel injector 09 after passing through the pre-heater 13; and then the primary air enters the burner 04 with carrying the fuel of the fuel injector 09; herein, the fuel is fed by a fuel supply equipment 16; and
the secondary air is standard pure oxygen; after passing through the pre-heater 13, the standard pure oxygen induced by a draught fan 19 enters the burner 04 through the pure oxygen injector 08.
The combustion control subassembly 22 further comprises a detector 24 for automatically monitoring concentrations of oxygen and CO2 and a temperature, so that a ratio of CO2 to flue gas and a ratio of fuel to pure oxygen which is a combustion supporting gas are able to be adjusted according to a combustion effect.
A double chambers boiler system with oxygen-enriched combustion comprises a boiler furnace subassembly 01 and a combustion control subassembly 22; wherein: the boiler furnace subassembly 01 comprises a combustion chamber 02 and a heat exchange chamber 03; the combustion chamber 02, which is a horizontal combustion chamber, is arranged at a lower part of the boiler furnace subassembly 01, and the heat exchange chamber 03 is arranged at an upper part of the boiler furnace subassembly 01; a high temperature flue gas outlet 10 is arranged between the combustion chamber 02 and the heat exchange chamber 03; and, the combustion control subassembly 22 comprises a burner 04, a pure oxygen injector 08 and a fuel injector 09.
An ash bucket 11 is arranged below the combustion chamber 02; five injection ports 05 are arranged at a middle part of the combustion chamber 02; and the high temperature flue gas outlet 10 is arranged at top of the combustion chamber 02. The injection ports 05 are arranged horizontally and symmetrically. For a wall 07 of the combustion chamber 02, an inner layer is made of high temperature refractory material, a middle layer is made of thermal insulation material, and an outer layer is made of structural material.
The heat exchange chamber 03 is intercommunicated with the combustion chamber 02 through the high temperature flue gas outlet 10; an inner wall of the heat exchange chamber 03 is a water wall 06; a boiler water wall pipe 12 is arranged in middle of the heat exchange chamber 03; a flue gas outlet 15 of the heat exchange chamber 03 is arranged at top of the heat exchange chamber 03; a waste heat recovery device 20 is arranged outside the flue gas outlet 15 of the heat exchange chamber 03; an economizer 21 is arranged in middle of the waste heat recovery device 20; an end gas outlet 14 is arranged at a tail end of the waste heat recovery device 20, and the end gas outlet 14 is connected to a pre-heater 13.
In the burner 04, in order to avoid explosion, primary air and secondary air are separately delivered; the primary air and the secondary air are sprayed into the combustion chamber 02 by the burner 04; the primary air is air carrying fuel, and the secondary air is pure oxygen;
all of the primary air is end gas exhausted from the waste heat recovery device 20; the end gas exhausted from the waste heat recovery device 20 enters the fuel injector 09 after passing through the pre-heater 13 and processing with flue gas separation, wherein the end gas is induced by a draught fan 17; and then the primary air enters the burner 04 with carrying the fuel of the fuel injector 09; herein, the fuel is fed by a fuel supply equipment 16; and
the secondary air is standard pure oxygen; after passing through the pre-heater 13, the standard pure oxygen induced by a draught fan 19 enters the burner 04 through the pure oxygen injector 08.
The combustion control subassembly 22 further comprises a detector 24 for automatically monitoring concentrations of oxygen and CO2 and a temperature, so that a ratio of CO2 to flue gas and a ratio of fuel to pure oxygen which is a combustion supporting gas are able to be adjusted according to a combustion effect.
A double chambers boiler system with oxygen-enriched combustion comprises a boiler furnace subassembly 01 and a combustion control subassembly 22; wherein: the boiler furnace subassembly 01 comprises a combustion chamber 02 and a heat exchange chamber 03; the combustion chamber 02, which is a horizontal combustion chamber, is arranged at a lower part of the boiler furnace subassembly 01, and the heat exchange chamber 03 is arranged at an upper part of the boiler furnace subassembly 01; a high temperature flue gas outlet 10 is arranged between the combustion chamber 02 and the heat exchange chamber 03; and, the combustion control subassembly 22 comprises a burner 04, a pure oxygen injector 08 and a fuel injector 09.
An ash bucket 11 is arranged below the combustion chamber 02; five injection ports 05 are arranged at a middle part of the combustion chamber 02; and the high temperature flue gas outlet 10 is arranged at top of the combustion chamber 02. The injection ports 05 are arranged horizontally and symmetrically. For a wall 07 of the combustion chamber 02, an inner layer is made of high temperature refractory material, a middle layer is made of thermal insulation material, and an outer layer is made of structural material.
The heat exchange chamber 03 is intercommunicated with the combustion chamber 02 through the high temperature flue gas outlet 10; an inner wall of the heat exchange chamber 03 is a water wall 06; a boiler water wall pipe 12 is arranged in middle of the heat exchange chamber 03; a flue gas outlet 15 of the heat exchange chamber 03 is arranged at top of the heat exchange chamber 03; a waste heat recovery device 20 is arranged outside the flue gas outlet 15 of the heat exchange chamber 03; an economizer 21 and a heat exchanger are arranged in middle of the waste heat recovery device 20; an end gas outlet 14 is arranged at a tail end of the waste heat recovery device 20, and the end gas outlet 14 is connected to a pre-heater 13.
In the burner 04, in order to avoid explosion, primary air and secondary air are separately delivered; the primary air and the secondary air are sprayed into the combustion chamber 02 by the burner 04; the primary air is air carrying fuel, and the secondary air is pure oxygen;
all of the primary air is CO2; CO2 induced by a draught fan 18 enters the fuel injector 09 after passing through the pre-heater 13; and then the primary air enters the burner 04 with carrying the fuel of the fuel injector 09; herein, the fuel is fed by a fuel supply equipment 16; and
the secondary air is standard pure oxygen; after passing through the pre-heater 13, the standard pure oxygen induced by a draught fan 19 enters the burner 04 through the pure oxygen injector 08.
The combustion control subassembly 22 further comprises a detector 24 for automatically monitoring concentrations of oxygen and CO2 and a temperature, so that a ratio of CO2 to flue gas and a ratio of fuel to pure oxygen which is a combustion supporting gas are able to be adjusted according to a combustion effect.
A double chambers boiler system with oxygen-enriched combustion comprises a boiler furnace subassembly 01 and a combustion control subassembly 22; wherein: the boiler furnace subassembly 01 comprises a combustion chamber 02 and a heat exchange chamber 03; the combustion chamber 02, which is a horizontal combustion chamber, is arranged at a lower part of the boiler furnace subassembly 01, and the heat exchange chamber 03 is arranged at an upper part of the boiler furnace subassembly 01; a high temperature flue gas outlet 10 is arranged between the combustion chamber 02 and the heat exchange chamber 03; and, the combustion control subassembly 22 comprises a burner 04, a pure oxygen injector 08 and a fuel injector 09.
An ash bucket 11 is arranged below the combustion chamber 02; six injection ports 05 are arranged at a middle part of the combustion chamber 02; and the high temperature flue gas outlet 10 is arranged at top of the combustion chamber 02. The injection ports 05 are arranged horizontally and symmetrically. For a wall 07 of the combustion chamber 02, an inner layer is made of high temperature refractory material, a middle layer is made of thermal insulation material, and an outer layer is made of structural material.
The heat exchange chamber 03 is intercommunicated with the combustion chamber 02 through the high temperature flue gas outlet 10; an inner wall of the heat exchange chamber 03 is a water wall 06; a boiler water wall pipe 12 is arranged in middle of the heat exchange chamber 03; a flue gas outlet 15 of the heat exchange chamber 03 is arranged at top of the heat exchange chamber 03; a waste heat recovery device 20 is arranged outside the flue gas outlet 15 of the heat exchange chamber 03; an economizer 21 is arranged in middle of the waste heat recovery device 20; an end gas outlet 14 is arranged at a tail end of the waste heat recovery device 20, and the end gas outlet 14 is connected to a pre-heater 13.
In the burner 04, in order to avoid explosion, primary air and secondary air are separately delivered; the primary air and the secondary air are sprayed into the combustion chamber 02 by the burner 04; the primary air is air carrying fuel, and the secondary air is pure oxygen;
a part of the primary air is end gas exhausted from the waste heat recovery device 20; the end gas exhausted from the waste heat recovery device 20 enters the fuel injector 09 after passing through the pre-heater 13 and processing with flue gas separation, wherein the end gas is induced by a draught fan 17; the other part of the primary air is CO2; CO2 induced by a draught fan 18 enters the fuel injector 09 after passing through the pre-heater 13; and then the primary air enters the burner 04 with carrying the fuel of the fuel injector 09; herein, the fuel is fed by a fuel supply equipment 16; and
the secondary air is standard pure oxygen; after passing through the pre-heater 13, the standard pure oxygen induced by a draught fan 19 enters the burner 04 through the pure oxygen injector 08.
The combustion control subassembly 22 further comprises a detector 24 for automatically monitoring concentrations of oxygen and CO2 and a temperature, so that a ratio of CO2 to flue gas and a ratio of fuel to pure oxygen which is a combustion supporting gas are able to be adjusted according to a combustion effect.
A double chambers boiler system with oxygen-enriched combustion comprises a boiler furnace subassembly 01 and a combustion control subassembly 22; wherein: the boiler furnace subassembly 01 comprises a combustion chamber 02 and a heat exchange chamber 03; the combustion chamber 02, which is a horizontal combustion chamber, is arranged at a lower part of the boiler furnace subassembly 01, and the heat exchange chamber 03 is arranged at an upper part of the boiler furnace subassembly 01; a high temperature flue gas outlet 10 is arranged between the combustion chamber 02 and the heat exchange chamber 03; and, the combustion control subassembly 22 comprises a burner 04, a pure oxygen injector 08 and a fuel injector 09.
An ash bucket 11 is arranged below the combustion chamber 02; six injection ports 05 are arranged at a middle part of the combustion chamber 02; and the high temperature flue gas outlet 10 is arranged at top of the combustion chamber 02. The injection ports 05 are arranged horizontally and symmetrically. For a wall 07 of the combustion chamber 02, an inner layer is made of high temperature refractory material, a middle layer is made of thermal insulation material, and an outer layer is made of structural material.
The heat exchange chamber 03 is intercommunicated with the combustion chamber 02 through the high temperature flue gas outlet 10; an inner wall of the heat exchange chamber 03 is a water wall 06; a boiler water wall pipe 12 is arranged in middle of the heat exchange chamber 03; a flue gas outlet 15 of the heat exchange chamber 03 is arranged at top of the heat exchange chamber 03; a waste heat recovery device 20 is arranged outside the flue gas outlet 15 of the heat exchange chamber 03; an economizer 21 and a heat exchanger are arranged in middle of the waste heat recovery device 20; an end gas outlet 14 is arranged at a tail end of the waste heat recovery device 20, and the end gas outlet 14 is connected to a pre-heater 13.
In the burner 04, in order to avoid explosion, primary air and secondary air are separately delivered; the primary air and the secondary air are sprayed into the combustion chamber 02 by the burner 04; the primary air is air carrying fuel, and the secondary air is pure oxygen;
all of the primary air is end gas exhausted from the waste heat recovery device 20; the end gas exhausted from the waste heat recovery device 20 enters the fuel injector 09 after passing through the pre-heater 13 and processing with flue gas separation, wherein the end gas is induced by a draught fan 17; and then the primary air enters the burner 04 with carrying the fuel of the fuel injector 09; herein, the fuel is fed by a fuel supply equipment 16; and
the secondary air is standard pure oxygen; after passing through the pre-heater 13, the standard pure oxygen induced by a draught fan 19 enters the burner 04 through the pure oxygen injector 08.
The combustion control subassembly 22 further comprises a detector 24 for automatically monitoring concentrations of oxygen and CO2 and a temperature, so that a ratio of CO2 to flue gas and a ratio of fuel to pure oxygen which is a combustion supporting gas are able to be adjusted according to a combustion effect.
A double chambers boiler system with oxygen-enriched combustion comprises a boiler furnace subassembly 01 and a combustion control subassembly 22; wherein: the boiler furnace subassembly 01 comprises a combustion chamber 02 and a heat exchange chamber 03; the combustion chamber 02, which is a standing combustion chamber, is arranged at a lower part of the boiler furnace subassembly 01, and the heat exchange chamber 03 is arranged at an upper part of the boiler furnace subassembly 01; a high temperature flue gas outlet 10 is arranged between the combustion chamber 02 and the heat exchange chamber 03; and, the combustion control subassembly 22 comprises a burner 04, a pure oxygen injector 08 and a fuel injector 09.
An ash bucket 11 is arranged below the combustion chamber 02; three injection ports 05 are arranged at a middle part of the combustion chamber 02; and the high temperature flue gas outlet 10 is arranged at top of the combustion chamber 02. The injection ports 05 are arranged horizontally and symmetrically. For a wall 07 of the combustion chamber 02, an inner layer is made of high temperature refractory material, a middle layer is made of thermal insulation material, and an outer layer is made of structural material.
The heat exchange chamber 03 is intercommunicated with the combustion chamber 02 through the high temperature flue gas outlet 10; an inner wall of the heat exchange chamber 03 is a water wall 06; a boiler water wall pipe 12 is arranged in middle of the heat exchange chamber 03; a flue gas outlet 15 of the heat exchange chamber 03 is arranged at top of the heat exchange chamber 03; a waste heat recovery device 20 is arranged outside the flue gas outlet 15 of the heat exchange chamber 03; an economizer 21 is arranged in middle of the waste heat recovery device 20; an end gas outlet 14 is arranged at a tail end of the waste heat recovery device 20, and the end gas outlet 14 is connected to a pre-heater 13.
In the burner 04, in order to avoid explosion, primary air and secondary air are separately delivered; the primary air and the secondary air are sprayed into the combustion chamber 02 by the burner 04; the primary air is air carrying fuel, and the secondary air is pure oxygen;
all of the primary air is CO2; CO2 induced by a draught fan 18 enters the fuel injector 09 after passing through the pre-heater 13; and then the primary air enters the burner 04 with carrying the fuel of the fuel injector 09; herein, the fuel is fed by a fuel supply equipment 16; and
the secondary air is standard pure oxygen; after passing through the pre-heater 13, the standard pure oxygen induced by a draught fan 19 enters the burner 04 through the pure oxygen injector 08.
The combustion control subassembly 22 further comprises a detector 24 for automatically monitoring concentrations of oxygen and CO2 and a temperature, so that a ratio of CO2 to flue gas and a ratio of fuel to pure oxygen which is a combustion supporting gas are able to be adjusted according to a combustion effect.
A double chambers boiler system with oxygen-enriched combustion comprises a boiler furnace subassembly 01 and a combustion control subassembly 22; wherein: the boiler furnace subassembly 01 comprises a combustion chamber 02 and a heat exchange chamber 03; the combustion chamber 02, which is a standing combustion chamber, is arranged at a lower part of the boiler furnace subassembly 01, and the heat exchange chamber 03 is arranged at an upper part of the boiler furnace subassembly 01; a high temperature flue gas outlet 10 is arranged between the combustion chamber 02 and the heat exchange chamber 03; and, the combustion control subassembly 22 comprises a burner 04, a pure oxygen injector 08 and a fuel injector 09.
An ash bucket 11 is arranged below the combustion chamber 02; three injection ports 05 are arranged at a middle part of the combustion chamber 02; and the high temperature flue gas outlet 10 is arranged at top of the combustion chamber 02. The injection ports 05 are arranged horizontally and symmetrically, namely in arrangement of equilateral triangle. For a wall 07 of the combustion chamber 02, an inner layer is made of high temperature refractory material, a middle layer is made of thermal insulation material, and an outer layer is made of structural material.
The heat exchange chamber 03 is intercommunicated with the combustion chamber 02 through the high temperature flue gas outlet 10; an inner wall of the heat exchange chamber 03 is a water wall 06; a boiler water wall pipe 12 is arranged in middle of the heat exchange chamber 03; a flue gas outlet 15 of the heat exchange chamber 03 is arranged at top of the heat exchange chamber 03; a waste heat recovery device 20 is arranged outside the flue gas outlet 15 of the heat exchange chamber 03; an economizer 21 and a heat exchanger are arranged in middle of the waste heat recovery device 20; an end gas outlet 14 is arranged at a tail end of the waste heat recovery device 20, and the end gas outlet 14 is connected to a pre-heater 13.
In the burner 04, in order to avoid explosion, primary air and secondary air are separately delivered; the primary air and the secondary air are sprayed into the combustion chamber 02 by the burner 04; the primary air is air carrying fuel, and the secondary air is pure oxygen;
a part of the primary air is end gas exhausted from the waste heat recovery device 20; the end gas exhausted from the waste heat recovery device 20 enters the fuel injector 09 after passing through the pre-heater 13 and processing with flue gas separation, wherein the end gas is induced by a draught fan 17; the other part of the primary air is CO2; CO2 induced by a draught fan 18 enters the fuel injector 09 after passing through the pre-heater 13; and then the primary air enters the burner 04 with carrying the fuel of the fuel injector 09; herein, the fuel is fed by a fuel supply equipment 16; and the secondary air is standard pure oxygen; after passing through the pre-heater 13, the standard pure oxygen induced by a draught fan 19 enters the burner 04 through the pure oxygen injector 08.
The combustion control subassembly 22 further comprises a detector 24 for automatically monitoring concentrations of oxygen and CO2 and a temperature, so that a ratio of CO2 to flue gas and a ratio of fuel to pure oxygen which is a combustion supporting gas are able to be adjusted according to a combustion effect.
A double chambers boiler system with oxygen-enriched combustion comprises a boiler furnace subassembly 01 and a combustion control subassembly 22; wherein: the boiler furnace subassembly 01 comprises a combustion chamber 02 and a heat exchange chamber 03; the combustion chamber 02, which is a standing combustion chamber, is arranged at a lower part of the boiler furnace subassembly 01, and the heat exchange chamber 03 is arranged at an upper part of the boiler furnace subassembly 01; a high temperature flue gas outlet 10 is arranged between the combustion chamber 02 and the heat exchange chamber 03; and, the combustion control subassembly 22 comprises a burner 04, a pure oxygen injector 08 and a fuel injector 09.
An ash bucket 11 is arranged below the combustion chamber 02; four injection ports 05 are arranged at a middle part of the combustion chamber 02; and the high temperature flue gas outlet 10 is arranged at top of the combustion chamber 02. The injection ports 05 are arranged horizontally and symmetrically. For a wall 07 of the combustion chamber 02, an inner layer is made of high temperature refractory material, a middle layer is made of thermal insulation material, and an outer layer is made of structural material.
The heat exchange chamber 03 is intercommunicated with the combustion chamber 02 through the high temperature flue gas outlet 10; an inner wall of the heat exchange chamber 03 is a water wall 06; a boiler water wall pipe 12 is arranged in middle of the heat exchange chamber 03; a flue gas outlet 15 of the heat exchange chamber 03 is arranged at top of the heat exchange chamber 03; a waste heat recovery device 20 is arranged outside the flue gas outlet 15 of the heat exchange chamber 03; an economizer 21 is arranged in middle of the waste heat recovery device 20; an end gas outlet 14 is arranged at a tail end of the waste heat recovery device 20, and the end gas outlet 14 is connected to a pre-heater 13.
In the burner 04, in order to avoid explosion, primary air and secondary air are separately delivered; the primary air and the secondary air are sprayed into the combustion chamber 02 by the burner 04; the primary air is air carrying fuel, and the secondary air is pure oxygen;
all of the primary air is end gas exhausted from the waste heat recovery device 20; the end gas exhausted from the waste heat recovery device 20 enters the fuel injector 09 after passing through the pre-heater 13 and processing with flue gas separation, wherein the end gas is induced by a draught fan 17; and then the primary air enters the burner 04 with carrying the fuel of the fuel injector 09; herein, the fuel is fed by a fuel supply equipment 16; and
the secondary air is standard pure oxygen; after passing through the pre-heater 13, the standard pure oxygen induced by a draught fan 19 enters the burner 04 through the pure oxygen injector 08.
The combustion control subassembly 22 further comprises a detector 24 for automatically monitoring concentrations of oxygen and CO2 and a temperature, so that a ratio of CO2 to flue gas and a ratio of fuel to pure oxygen which is a combustion supporting gas are able to be adjusted according to a combustion effect.
A double chambers boiler system with oxygen-enriched combustion comprises a boiler furnace subassembly 01 and a combustion control subassembly 22; wherein: the boiler furnace subassembly 01 comprises a combustion chamber 02 and a heat exchange chamber 03; the combustion chamber 02, which is a standing combustion chamber, is arranged at a lower part of the boiler furnace subassembly 01, and the heat exchange chamber 03 is arranged at an upper part of the boiler furnace subassembly 01; a high temperature flue gas outlet 10 is arranged between the combustion chamber 02 and the heat exchange chamber 03; and, the combustion control subassembly 22 comprises a burner 04, a pure oxygen injector 08 and a fuel injector 09.
An ash bucket 11 is arranged below the combustion chamber 02; four injection ports 05 are arranged at a middle part of the combustion chamber 02; and the high temperature flue gas outlet 10 is arranged at top of the combustion chamber 02. The injection ports 05 are arranged horizontally and symmetrically. For a wall 07 of the combustion chamber 02, an inner layer is made of high temperature refractory material, a middle layer is made of thermal insulation material, and an outer layer is made of structural material.
The heat exchange chamber 03 is intercommunicated with the combustion chamber 02 through the high temperature flue gas outlet 10; an inner wall of the heat exchange chamber 03 is a water wall 06; a boiler water wall pipe 12 is arranged in middle of the heat exchange chamber 03; a flue gas outlet 15 of the heat exchange chamber 03 is arranged at top of the heat exchange chamber 03; a waste heat recovery device 20 is arranged outside the flue gas outlet 15 of the heat exchange chamber 03; an economizer 21 and a heat exchanger are arranged in middle of the waste heat recovery device 20; an end gas outlet 14 is arranged at a tail end of the waste heat recovery device 20, and the end gas outlet 14 is connected to a pre-heater 13.
In the burner 04, in order to avoid explosion, primary air and secondary air are separately delivered; the primary air and the secondary air are sprayed into the combustion chamber 02 by the burner 04; the primary air is air carrying fuel, and the secondary air is pure oxygen;
all of the primary air is CO2; CO2 induced by a draught fan 18 enters the fuel injector 09 after passing through the pre-heater 13; and then the primary air enters the burner 04 with carrying the fuel of the fuel injector 09; herein, the fuel is fed by a fuel supply equipment 16; and
the secondary air is standard pure oxygen; after passing through the pre-heater 13, the standard pure oxygen induced by a draught fan 19 enters the burner 04 through the pure oxygen injector 08.
The combustion control subassembly 22 further comprises a detector 24 for automatically monitoring concentrations of oxygen and CO2 and a temperature, so that a ratio of CO2 to flue gas and a ratio of fuel to pure oxygen which is a combustion supporting gas are able to be adjusted according to a combustion effect.
A double chambers boiler system with oxygen-enriched combustion comprises a boiler furnace subassembly 01 and a combustion control subassembly 22; wherein: the boiler furnace subassembly 01 comprises a combustion chamber 02 and a heat exchange chamber 03; the combustion chamber 02, which is a standing combustion chamber, is arranged at a lower part of the boiler furnace subassembly 01, and the heat exchange chamber 03 is arranged at an upper part of the boiler furnace subassembly 01; a high temperature flue gas outlet 10 is arranged between the combustion chamber 02 and the heat exchange chamber 03; and, the combustion control subassembly 22 comprises a burner 04, a pure oxygen injector 08 and a fuel injector 09.
An ash bucket 11 is arranged below the combustion chamber 02; five injection ports 05 are arranged at a middle part of the combustion chamber 02; and the high temperature flue gas outlet 10 is arranged at top of the combustion chamber 02. The injection ports 05 are arranged horizontally and symmetrically. For a wall 07 of the combustion chamber 02, an inner layer is made of high temperature refractory material, a middle layer is made of thermal insulation material, and an outer layer is made of structural material.
The heat exchange chamber 03 is intercommunicated with the combustion chamber 02 through the high temperature flue gas outlet 10; an inner wall of the heat exchange chamber 03 is a water wall 06; a boiler water wall pipe 12 is arranged in middle of the heat exchange chamber 03; a flue gas outlet 15 of the heat exchange chamber 03 is arranged at top of the heat exchange chamber 03; a waste heat recovery device 20 is arranged outside the flue gas outlet 15 of the heat exchange chamber 03; an economizer 21 is arranged in middle of the waste heat recovery device 20; an end gas outlet 14 is arranged at a tail end of the waste heat recovery device 20, and the end gas outlet 14 is connected to a pre-heater 13.
In the burner 04, in order to avoid explosion, primary air and secondary air are separately delivered; the primary air and the secondary air are sprayed into the combustion chamber 02 by the burner 04; the primary air is air carrying fuel, and the secondary air is pure oxygen;
a part of the primary air is end gas exhausted from the waste heat recovery device 20; the end gas exhausted from the waste heat recovery device 20 enters the fuel injector 09 after passing through the pre-heater 13 and processing with flue gas separation, wherein the end gas is induced by a draught fan 17; the other part of the primary air is CO2; CO2 induced by a draught fan 18 enters the fuel injector 09 after passing through the pre-heater 13; and then the primary air enters the burner 04 with carrying the fuel of the fuel injector 09; herein, the fuel is fed by a fuel supply equipment 16; and
the secondary air is standard pure oxygen; after passing through the pre-heater 13, the standard pure oxygen induced by a draught fan 19 enters the burner 04 through the pure oxygen injector 08.
The combustion control subassembly 22 further comprises a detector 24 for automatically monitoring concentrations of oxygen and CO2 and a temperature, so that a ratio of CO2 to flue gas and a ratio of fuel to pure oxygen which is a combustion supporting gas are able to be adjusted according to a combustion effect.
A double chambers boiler system with oxygen-enriched combustion comprises a boiler furnace subassembly 01 and a combustion control subassembly 22; wherein: the boiler furnace subassembly 01 comprises a combustion chamber 02 and a heat exchange chamber 03; the combustion chamber 02, which is a standing combustion chamber, is arranged at a lower part of the boiler furnace subassembly 01, and the heat exchange chamber 03 is arranged at an upper part of the boiler furnace subassembly 01; a high temperature flue gas outlet 10 is arranged between the combustion chamber 02 and the heat exchange chamber 03; and, the combustion control subassembly 22 comprises a burner 04, a pure oxygen injector 08 and a fuel injector 09.
An ash bucket 11 is arranged below the combustion chamber 02; five injection ports 05 are arranged at a middle part of the combustion chamber 02; and the high temperature flue gas outlet 10 is arranged at top of the combustion chamber 02. The injection ports 05 are arranged horizontally and symmetrically. For a wall 07 of the combustion chamber 02, an inner layer is made of high temperature refractory material, a middle layer is made of thermal insulation material, and an outer layer is made of structural material.
The heat exchange chamber 03 is intercommunicated with the combustion chamber 02 through the high temperature flue gas outlet 10; an inner wall of the heat exchange chamber 03 is a water wall 06; a boiler water wall pipe 12 is arranged in middle of the heat exchange chamber 03; a flue gas outlet 15 of the heat exchange chamber 03 is arranged at top of the heat exchange chamber 03; a waste heat recovery device 20 is arranged outside the flue gas outlet 15 of the heat exchange chamber 03; an economizer 21 and a heat exchanger are arranged in middle of the waste heat recovery device 20; an end gas outlet 14 is arranged at a tail end of the waste heat recovery device 20, and the end gas outlet 14 is connected to a pre-heater 13.
In the burner 04, in order to avoid explosion, primary air and secondary air are separately delivered; the primary air and the secondary air are sprayed into the combustion chamber 02 by the burner 04; the primary air is air carrying fuel, and the secondary air is pure oxygen;
all of the primary air is end gas exhausted from the waste heat recovery device 20; the end gas exhausted from the waste heat recovery device 20 enters the fuel injector 09 after passing through the pre-heater 13 and processing with flue gas separation, wherein the end gas is induced by a draught fan 17; and then the primary air enters the burner 04 with carrying the fuel of the fuel injector 09; herein, the fuel is fed by a fuel supply equipment 16; and
the secondary air is standard pure oxygen; after passing through the pre-heater 13, the standard pure oxygen induced by a draught fan 19 enters the burner 04 through the pure oxygen injector 08.
The combustion control subassembly 22 further comprises a detector 24 for automatically monitoring concentrations of oxygen and CO2 and a temperature, so that a ratio of CO2 to flue gas and a ratio of fuel to pure oxygen which is a combustion supporting gas are able to be adjusted according to a combustion effect.
A double chambers boiler system with oxygen-enriched combustion comprises a boiler furnace subassembly 01 and a combustion control subassembly 22; wherein: the boiler furnace subassembly 01 comprises a combustion chamber 02 and a heat exchange chamber 03; the combustion chamber 02, which is a standing combustion chamber, is arranged at a lower part of the boiler furnace subassembly 01, and the heat exchange chamber 03 is arranged at an upper part of the boiler furnace subassembly 01; a high temperature flue gas outlet 10 is arranged between the combustion chamber 02 and the heat exchange chamber 03; and, the combustion control subassembly 22 comprises a burner 04, a pure oxygen injector 08 and a fuel injector 09.
An ash bucket 11 is arranged below the combustion chamber 02; six injection ports 05 are arranged at a middle part of the combustion chamber 02; and the high temperature flue gas outlet 10 is arranged at top of the combustion chamber 02. The injection ports 05 are arranged horizontally and symmetrically. For a wall 07 of the combustion chamber 02, an inner layer is made of high temperature refractory material, a middle layer is made of thermal insulation material, and an outer layer is made of structural material.
The heat exchange chamber 03 is intercommunicated with the combustion chamber 02 through the high temperature flue gas outlet 10; an inner wall of the heat exchange chamber 03 is a water wall 06; a boiler water wall pipe 12 is arranged in middle of the heat exchange chamber 03; a flue gas outlet 15 of the heat exchange chamber 03 is arranged at top of the heat exchange chamber 03; a waste heat recovery device 20 is arranged outside the flue gas outlet 15 of the heat exchange chamber 03; an economizer 21 is arranged in middle of the waste heat recovery device 20; an end gas outlet 14 is arranged at a tail end of the waste heat recovery device 20, and the end gas outlet 14 is connected to a pre-heater 13.
In the burner 04, in order to avoid explosion, primary air and secondary air are separately delivered; the primary air and the secondary air are sprayed into the combustion chamber 02 by the burner 04; the primary air is air carrying fuel, and the secondary air is pure oxygen;
all of the primary air is end gas exhausted from the waste heat recovery device 20; the end gas exhausted from the waste heat recovery device 20 enters the fuel injector 09 after passing through the pre-heater 13 and processing with flue gas separation, wherein the end gas is induced by a draught fan 17; and then the primary air enters the burner 04 with carrying the fuel of the fuel injector 09; herein, the fuel is fed by a fuel supply equipment 16; and
the secondary air is standard pure oxygen; after passing through the pre-heater 13, the standard pure oxygen induced by a draught fan 19 enters the burner 04 through the pure oxygen injector 08.
The combustion control subassembly 22 further comprises a detector 24 for automatically monitoring concentrations of oxygen and CO2 and a temperature, so that a ratio of CO2 to flue gas and a ratio of fuel to pure oxygen which is a combustion supporting gas are able to be adjusted according to a combustion effect.
A double chambers boiler system with oxygen-enriched combustion comprises a boiler furnace subassembly 01 and a combustion control subassembly 22; wherein: the boiler furnace subassembly 01 comprises a combustion chamber 02 and a heat exchange chamber 03; the combustion chamber 02, which is a standing combustion chamber, is arranged at a lower part of the boiler furnace subassembly 01, and the heat exchange chamber 03 is arranged at an upper part of the boiler furnace subassembly 01; a high temperature flue gas outlet 10 is arranged between the combustion chamber 02 and the heat exchange chamber 03; and, the combustion control subassembly 22 comprises a burner 04, a pure oxygen injector 08 and a fuel injector 09.
An ash bucket 11 is arranged below the combustion chamber 02; six injection ports 05 are arranged at a middle part of the combustion chamber 02; and the high temperature flue gas outlet 10 is arranged at top of the combustion chamber 02. The injection ports 05 are arranged horizontally and symmetrically. For a wall 07 of the combustion chamber 02, an inner layer is made of high temperature refractory material, a middle layer is made of thermal insulation material, and an outer layer is made of structural material.
The heat exchange chamber 03 is intercommunicated with the combustion chamber 02 through the high temperature flue gas outlet 10; an inner wall of the heat exchange chamber 03 is a water wall 06; a boiler water wall pipe 12 is arranged in middle of the heat exchange chamber 03; a flue gas outlet 15 of the heat exchange chamber 03 is arranged at top of the heat exchange chamber 03; a waste heat recovery device 20 is arranged outside the flue gas outlet 15 of the heat exchange chamber 03; an economizer 21 and a heat exchanger are arranged in middle of the waste heat recovery device 20; an end gas outlet 14 is arranged at a tail end of the waste heat recovery device 20, and the end gas outlet 14 is connected to a pre-heater 13.
In the burner 04, in order to avoid explosion, primary air and secondary air are separately delivered; the primary air and the secondary air are sprayed into the combustion chamber 02 by the burner 04; the primary air is air carrying fuel, and the secondary air is pure oxygen;
a part of the primary air is end gas exhausted from the waste heat recovery device 20; the end gas exhausted from the waste heat recovery device 20 enters the fuel injector 09 after passing through the pre-heater 13 and processing with flue gas separation, wherein the end gas is induced by a draught fan 17; the other part of the primary air is CO2; CO2 induced by a draught fan 18 enters the fuel injector 09 after passing through the pre-heater 13; and then the primary air enters the burner 04 with carrying the fuel of the fuel injector 09; herein, the fuel is fed by a fuel supply equipment 16; and
the secondary air is standard pure oxygen; after passing through the pre-heater 13, the standard pure oxygen induced by a draught fan 19 enters the burner 04 through the pure oxygen injector 08.
The combustion control subassembly 22 further comprises a detector 24 for automatically monitoring concentrations of oxygen and CO2 and a temperature, so that a ratio of CO2 to flue gas and a ratio of fuel to pure oxygen which is a combustion supporting gas are able to be adjusted according to a combustion effect.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201711230671.7 | Nov 2017 | CN | national |
This is a U.S. National Stage under 35 U.S.C 371 of the International Application PCT/CN2017/113977, filed Nov. 30, 2017, which claims priority under 35 U.S.C. 119(a-d) to CN 201711230671.7, filed Nov. 29, 2017.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2017/113977 | 11/30/2017 | WO | 00 |
