Patent Application
20190127245
This disclosure belongs to the technical field of sewage water treatment, and particularly to a method of treating a black and odorous river.
This disclosure also relates to an apparatus for implementing the method described above.
At present, most of urban river channels in China have become black and odorous river channels. In many cities in China, organic pollution of river channels is ubiquitous and increasingly notable. Urban sewage water is directly discharged to river channels and river segments flowing through towns are severely polluted, and the water therein looks black and produces odorous seasonally or perennially. All of these become problems of the water environment urgent to be solved in problems of urban river channel pollution.
River water pollution is mainly for the following reasons.
1) As the economy develops and town populations continuously increase around rivers, water for production and living also greatly increases and the bearing capacity and the self-cleaning capacity for organic matters discharged to rivers decrease.
2) A large amount of untreated waste water and sewage water from industrial companies, breeding companies, and city living is discharged to rivers, leading to pollution and eutrophication of river water. Aquatic plants in river water excessively grow, leading to the decrease in the oxygen content in water and corruption and deterioration of water.
3) The flowability of river water is bad, nutrients in water are enriched, and the oxygen content in water is consumed by nutrients in water and becomes lower rather than increased. The decrease in the oxygen content in turn promotes the increase in anaerobic organisms in water. Under the combined action of these factors, water is eutrophicated and finally becomes a pool of stagnant water.
4) Organic pollutants contained in waste water and sewage water discharged to rivers is deposited for a long period to form sludge at the bottom of rivers. When hot weather and long-time irradiation of sunlight occur in summer and the temperature of water increases, river bed sludge is decomposed to release large amounts of eutrophication matters such as nitrogen as ammonia form, and the like, so that various organic matters such as microorganisms, algae, and the like in river water propagate massively and the quality of river water deteriorates rapidly. This results in sudden water pollution, which severely influences production of companies and living of urban inhabitants around rivers.
Conventional treatments of river water pollution usually employ water transfer and drainage, mechanical dragging, waterweed planting, fish farming, microorganism input, and the like. In the application process of the methods described above, there are defects of non-significant effects, high treatment cost, non-thorough treatment, and the like.
An object of this disclosure is to provide a method of treating a black and odorous river.
Another object of this disclosure is to provide an apparatus for implementing the method described above.
In order to achieve the object described above, the method of treating a black and odorous river provided in this disclosure mainly comprises:
1) withdrawing a sludge in river bed from a black and odorous river to be treated, and performing treatments of separation, dehydration, and drying on the sludge with a sand-stone refuse separation apparatus, a dehydration apparatus, and a drying apparatus;
2) producing biochar from the separated, dehydrated, and dried sludge;
3) pulverizing river surface floats or/and river bank refuse from the river, performing treatments of dehydration and drying on the pulverized river surface floats or/and river bank refuse, and then producing biochar from the river surface floats or/and river bank refuse;
4) delivering the biochar produced in steps 2) and 3) back to the river bed to absorb nitrogen as ammonia form and phosphorus generated by degradation of organic matters in the river bed, thereby cleaning river water;
5) performing purification treatments of flocculation, precipitation, and activated coke filtration and adsorption on sewage water discharged from the dehydration apparatus in step 2) and 3), and discharging the treated sewage water back to the river; and
6) performing circular purification treatments on the black and odorous river by withdrawing water from one end of a river segment to be treated with a water pump, sequentially passing the water into a container-type flocculation apparatus, a container-type precipitation apparatus, and a container-type activated coke filtration and adsorption apparatus for performing purification treatments of flocculation, precipitation, and activated coke filtration and adsorption, and discharging the treated water back into the river at the other end of the river segment to be treated after it reaches a water quality standard for river water specified by a local government, and finally overall recovering the water quality of the treated river segment to the river water quality standard specified by the local government.
In the method described, step 1 is withdrawing the sludge in the river bed from a river segment to be treated, and decreasing a water content rate of sludge from ≤95% to ≤40% by separation, dehydration, and drying procedures.
In the method described, step 2 and step 3 are producing biochar by using a carbonization method.
In the method described, step 5 is performing purification treatments of flocculation, precipitation, and activated coke filtration and adsorption on sewage water discharged from the dehydration apparatus, and then discharging the purified sewage water back to the river.
In the method described, step 6 is performing purification treatments of flocculation, precipitation, and activated coke filtration and adsorption on black and odorous river water, and then discharging the treated black and odorous river water back to the other end of the river segment to be treated after it reaches a water quality standard for river water specified by a local government, thereby performing circular purification treatments.
In the apparatus for implementing the method described above provided by this disclosure:
a sludge suction device, a container-type sand-stone refuse separation device, a container-type dehydration device, a container-type pulverization device, a container-type drying device, a container-type carbonization device, a container-type flocculation device, a container-type precipitation device, a container-type activated coke filtration and adsorption device, a container-type power generation device, and a container-type operation and control chamber are conveyed to an on-site field;
a water surface operation platform in the sludge suction device is placed into a river and a pneumatic pump is mounted onto the water surface operation platform, the sludge suction device is connected to the container-type sand-stone refuse separation device via a sludge delivery pipe laid on a water surface, large-size matters discharged from the container-type sand-stone refuse separation device is delivered to the container-type pulverization device for pulverization and then passed into the container-type dehydration device for dehydration, sludge treated by the container-type sand-stone refuse separation device is passed into the container-type dehydration device, sewage water dehydrated by the container-type dehydration device is sequentially passed into the container-type flocculation device, the container-type precipitation device, and the container-type activated coke filtration and adsorption device for performing purification treatments of flocculation, precipitation, and activated coke filtration and adsorption, and the resulted water satisfying the water quality standard is discharged back to the river, the sludge dehydrated by the container-type dehydration device is passed into the container-type drying device for treatment, the residue treated by the container-type drying device is delivered to the container-type carbonization device for producing biochar;
river surface floats and river bank refuse collected by a cleaning ship are delivered to the container-type pulverization device for pulverization and then passed into the container-type dehydration device for dehydration, the residue after dehydration was passed into the container-type drying device for treatment, the residue treated by the container-type drying device is delivered to the container-type carbonization device for producing biochar, and the sewage water is sequentially passed into the container-type flocculation device, the container-type precipitation device, and the container-type activated coke filtration and adsorption device for performing purification treatments of flocculation, precipitation, and activated coke filtration and adsorption and then discharged back to the river;
withdrawing water from one end of a river to be treated with a water pump, sequentially passing the water into the container-type flocculation device, the container-type precipitation device, and the container-type activated coke filtration and adsorption device for performing purification treatments of flocculation, precipitation, and activated coke filtration and adsorption, and discharging the treated water back into the river at the other end of the treated river segment after the treated water satisfies a water quality standard for river water specified by a local government.
the biochar is delivered back to the river bed via a delivery pipeline;
operations of the various devices described above are controlled by the container-type operation and control chamber.
In the apparatus described, delivery facilities and a storage container are provided among the container-type sand-stone refuse separation device, the container-type dehydration device, the container-type drying device, and the container-type carbonization device.
In the apparatus described, the storage container is an open-top container and the storage container is divided into a plurality of storage units, and the lower part of each storage unit is a unit conical body, a unit output port is provided in the lower part of the unit conical body, and a belt conveyor is mounted in the lower part of each unit output port.
In the apparatus described, a container body is provided in the container-type activated coke filtration and adsorption device, a plurality of discharging ports, water outlet pipes, and water inlet pipes are provided on a side surface of the container body, a plurality of charging ports are provided on the top of the container body, lifting holes are provided at four top corners of the container body of the container body, locking holes are provided at four bottom corners of the container body, and an activated coke filtration and adsorption material is filled with the container body.
In the apparatus described, power of the various devices is supplied by the container-type power generation device, the container-type power generation device being composed of two parts, i.e. a container and a diesel power generation facility, and the diesel power generation facility is mounted within the container.
In the apparatus described, the container-type operation and control chamber is composed of two parts, i.e. a container and an electrical control facility, and the electrical control facility is mounted in the container.
1. a segment of black and odorous river to be treated, 2. a sludge suction device, 3. a sludge delivery pipeline, 4. sludge, 5. a container-type dehydration device, 6. a storage container, 7. a container-type carbonization device, 8. a biochar, 9. a cleaning ship, 10. river surface floats and river bank refuse, 11. a container-type pulverization device, 12. a water pump, 13. a container-type flocculation device, 14. a container-type precipitation device, 15. a container-type activated coke filtration and adsorption device, 16A, 16B. delivery pipelines, 17. sewage water, 18. a container-type power generation device, 19. a container-type operation and control chamber, 20. a storage unit, 21. a unit conical body, 22. a unit output port, 23. a belt conveyor, 24. a container body, 25. a discharging port, 26. a charging port, 27. a lifting hole, 28. a locking hole, 29. a water outlet pipe, 30. a water inlet pipe, 32. a delivery facility A, 33. a delivery facility B, 34. a delivery facility C, 35. a delivery facility D, 36. a delivery facility E, 37. a container-type drying device, 38. a container-type sand-stone refuse separation device, 39. large-size matters, 40. a delivery facility F.
In order to enable objects, technical solutions, and advantages of this disclosure to be more obvious and clear, this disclosure will be further illustrated in details in conjunction with specific embodiments and with reference to figures.
The method of this disclosure mainly comprises the steps of: cleaning of river bed sludge; dehydration of sludge, clearing away of river surface floats and river bank refuse; pulverization of the river surface floats and river bank refuse; drying and carbonization of dehydrated sludge; drying and carbonization of dehydrated river surface floats and river bank refuse; circular purification treatments of flocculation, precipitation, and filtration and adsorption of sewage water; circular purification treatments of flocculation, precipitation, and filtration and adsorption of river water; and the like.
In detail, the method of treating a black and odorous river provided by this disclosure is as follows.
(1) A field for placing facilities is selected near a segment of a black and odorous river to be treated, as an on-site field. The on-site field for mounting facilities is temporarily used and no permanent facilities are constructed, the field used will be recovered to the original function of use after the treatment of a black and odorous river segment is finished.
(2) A container-type sand-stone refuse separation device (for example, a container-type grille), a container-type dehydration device, a container-type pulverization device, a container-type drying device, a container-type carbonization device, a container-type flocculation and precipitation device, a container-type activated coke filtration and adsorption device, a container-type power generation device, a container-type control and detection chamber, a container-type living facility, and the like are conveyed to the on-site field with a tow truck and placed thereon.
(3) A pneumatic-pump assembled-type water surface operation platform is conveyed to the on-site field with a tow truck, placed into the river with a crane, and assembled therein. A pneumatic pump is mounted onto the water surface operation platform. A sludge delivery pipe is laid on the water surface to the field for placing facilities.
(4) The river bed sludge is withdrawn with the pneumatic pump. The sludge is sequentially delivered to the container-type sand-stone refuse separation device, the container-type dehydration device, and the container-type drying device via delivery pipes on the surface of the river. The water content rate of the sludge is decreased from ≤95% to ≤40% by the dehydration device and the drying device.
(5) Biochar is produced from the dehydrated and dried sludge by using a carbonization method.
(6) Large-size matters discharged from the container-type sand-stone refuse separation device and the river surface floats and river bank refuse are pulverized by the pulverization device. The pulverized large-size matters and the pulverized river surface floats and river bank refuse are dehydrated and dried, and then form biochar by using a carbonization method.
(7) The biochar produced from the carbonized sludge, the large-size matters, and the river surface floats and river bank refuse is delivered back to the river bed to absorb nitrogen as ammonia form, phosphorus, and the like generated by degradation of organic matters in the river bed, thereby cleaning river water.
(8) Purification treatments of flocculation, precipitation, and activated coke filtration and adsorption are performed on sewage water discharged from the sludge dehydration device, and the purified sewage water is discharged back to the river.
(9) Circular purification treatments are performed on the black and odorous river. The black and odorous river water is withdrawn from one end of a river segment to be treated with a water pump, subjected to purification treatments of flocculation, precipitation, and activated coke filtration and adsorption, and discharged back into the river at the other end of the river segment after it reaches a water quality standard for river water specified by a local government. The water quality of the treated river segment is finally overall recovered to the river water quality standard specified by the local government.
The apparatus for implementing the method described above provided by this disclosure mainly comprise:
(1) a river bed sludge suction device;
(2) a container-type sand-stone refuse separation device, for example a container-type grille;
(3) a container-type dehydration device;
(4) a container-type pulverization device;
(5) a container-type storage bin;
(6) a container-type drying device;
(7) a container-type carbonization device;
(8) a container-type flocculation device;
(9) a container-type precipitation device;
(10) a container-type activated coke filtration and adsorption device;
(11) a container-type power generation device;
(12) a container-type control and detection chamber; and
(13) a cleaning ship for river surface floats and river bank refuse.
The specific relationship of connection is as follows.
A container-type sand-stone refuse separation device, a container-type dehydration device, a container-type pulverization device, a container-type drying device, a container-type carbonization device, a container-type flocculation and precipitation device, a container-type activated coke filtration and adsorption device, a container-type power generation device, a container-type control and detection chamber, and the like are conveyed to the on-site field with a tow truck.
An assembled-type water surface operation platform is conveyed to the on-site field with a tow truck, placed into the river with a crane, and assembled therein. A pneumatic pump is mounted onto the water surface operation platform. A sludge delivery pipe is laid on the water surface to the field for placing facilities.
The river bed sludge is withdrawn with the pneumatic pump. The sludge is delivered to the container-type sand-stone refuse separation device, the container-type dehydration device, and the container-type drying device via delivery pipes on the surface of the river. The water content rate of the sludge is decreased from ≤95% to ≤40% by the dehydration device and the drying device.
Biochar is produced from the dehydrated sludge by using a carbonization method.
River surface floats and river bank refuse are cleared away and pulverized by the pulverization device. The pulverized river surface floats and river bank refuse are dehydrated and dried, and then form biochar by using a carbonization method.
The biochars produced from the carbonized sludge, the large-size matters, and the river surface floats and river bank refuse are delivered back to the river bed to absorb nitrogen as ammonia form, phosphorus, and the like generated by degradation of organic matters in river bed, thereby cleaning river water.
Purification treatments of flocculation, precipitation, and activated coke filtration and adsorption are performed on sewage water discharged from the sludge dehydration device, and the purified sewage water is discharged back to the river.
Circular purification treatments are performed on the black and odorous river water. The black and odorous river water is withdrawn from one end of a river segment to be treated with a water pump, subjected to purification treatments of flocculation, precipitation, and activated coke filtration and adsorption, and discharged back into the river at the other end of the river segment after it reaches a water quality standard for river water specified by a local government. The water quality of the treated river segment is finally overall recovered to the river water quality standard specified by the local government.
Detailed description will be made below in conjunction with accompanying drawings. It is to be indicated that various apparatuses shown in accompanying drawings are used as an Example, and specific arrangements thereof are not limited to the accompanying drawings only.
The pollution treatment of black and odorous river water comprises:
Withdrawing river bed sludge; dehydration and drying of the sludge; clearing away of river surface floats and river bank refuse; pulverization of the river surface floats and river bank refuse; dehydration and drying of the river surface floats and river bank refuse;
carbonization of the dehydrated and dried sludge; carbonization of the dehydrated and dried river surface floats and river bank refuse; flocculation treatment of the river water and the sewage water; precipitation treatment of the river water and the sewage water; and circular purification treatments of filtration and adsorption of the river water and the sewage water.
A field for placing facilities is selected near a segment 1 of a black and odorous river to be treated, as an on-site field.
A sludge suction device 2 is conveyed to an on-site field with a tow truck, and the sludge suction device 2 is placed into the segment 1 of the black and odorous river with a crane.
A sludge delivery pipe 3 is laid on the water surface of the segment 1 of the black and odorous river to the field for placing facilities. The sludge suction device 2 is a well-known facility. The type of the sludge suction device 2 used in the present disclosure is not strictly limited. A relatively desirable facility can withdraw sludge from the river bed by using a pneumatic pump mounted on an assembled-type water surface operation platform in the case where the river water is minimally disturbed.
A cleaning ship 9 is conveyed to the on-site field with a tow truck, and the cleaning ship 9 is placed in the segment 1 of the black and odorous river to be treated with a crane.
A container-type sand-stone refuse separation device 38, a container-type dehydration device 5, a storage container 6, a container-type drying device 37, a container-type carbonization device 7, a container-type pulverization device 11, a water pump 12, a container-type flocculation device 13, a container-type precipitation device 14, a container-type activated coke filtration and adsorption device 15, a delivery pipelines 16, sewage water 17, a container-type power generation device 18, a container-type operation and control chamber 19, a delivery facility A32, a delivery facility B33, a delivery facility C34, a delivery facility D35, a delivery facility E36, a delivery facility F40, and the like are conveyed to the on-site field with a tow truck and placed thereon.
The container-type sand-stone refuse separation device 38 is a sand-stone refuse separation device mounted in a container. The container and the sand-stone refuse separation device are both well-known facilities. The type of the sand-stone refuse separation device used as the container-type sand-stone refuse separation device 38 is not strictly limited in this disclosure, as long as it can be mounted in a container and can remove the large-size matters in sludge.
The container-type dehydration device 5 is a dehydration facility mounted in a container. The type of the dehydration facility used as the container-type dehydration device 5 is not strictly limited in this disclosure, as long as it can be mounted in a container and satisfy that the water content rate of sludge is decreased from ≤95% to ≤75%. A well-known centrifugal type dehydration facility or/and a press filtration type dehydration facility may be used. A relatively desirable facility is a press filtration type dehydration facility.
The container-type drying device 37 is a drying facility mounted on a platform container. The platform container and the drying facility are both well-known facilities. The type of the drying facility used as the container-type drying device 37 is not strictly limited in this disclosure, as long as it can be mounted on a platform container and satisfy that the water content rate of sludge is decreased from ≤75% to ≤40%. A well-known drum type drying machine may be used.
With reference to
The container-type carbonization device 7 is composed of two parts, which are a 40-foot container and a carbonization facility. The 40-foot container and the carbonization facility are both well-known facilities. The type of the facility used as the carbonization facility is not strictly limited in this disclosure, as long as it can satisfy the carbonization of sludge and river surface floats and river bank refuse, for example the carbonization devices disclosed in Patent No. ZL200810135666.2 and ZL201010510277.0.
With reference to
The cleaning ship 9 is a well-known facility. The type of the ship used as the cleaning ship is not strictly limited in this disclosure, as long as it can clear away the river surface floats and river bank refuse.
The container-type pulverization device 11 is composed of two parts, which are a 20-foot container and a pulverizing facility, and the pulverization facility is mounted on a platform container. The platform container and the pulverization facility are both well-known facilities. The type of the pulverization facility used in this disclosure is not strictly limited, as long as it can satisfy the pulverization of river surface floats and river bank refuse.
The water pump 12 is a well-known facility. The type of the water pump used is not strictly limited in this disclosure, as long as it can deliver the river water to the container-type flocculation device 13.
The container-type flocculation device 13 is composed of two parts, which are a 40-foot container and a flocculation facility, and the flocculation facility is mounted in the container. The container and the flocculation facility are both well-known facilities. The type of the flocculation facility used in this disclosure is not strictly limited, as long as it can satisfy the flocculation treatments of the sewage water and the river water. A relatively desirable facility is a magnetic flocculation facility.
The container-type precipitation device 14 is composed of two parts, which are a 40-foot container and a precipitation facility, and the precipitation facility is mounted in the container. The container and the precipitation facility are both well-known facilities. The type of the precipitation facility used in this disclosure is not strictly limited, as long as it can satisfy the precipitation treatment of the sewage water and the river water after the flocculation treatment.
The container-type power generation device 18 is composed of two parts, which are a container and a diesel power generation facility, and the diesel power generation facility is mounted in the container. The container and the diesel power generation facility are all well-known facilities.
The container-type operation and control chamber 19 is composed of two parts, which are a container and an electrical control facility, and the electrical control facility is mounted in the container. The container and the electrical control facility are both well-known facilities.
The delivery facility A32, the delivery facility B33, the delivery facility C34, the delivery facility D35, the delivery facility E36, and the delivery facility F40 are all well-known facilities. The type of the delivery facility used in this disclosure is not strictly limited, as long as it can satisfy the delivery of materials. A well-known belt conveyor or/and a screw conveyor may be used.
The sludge suction device 2 withdraws the river bed sludge by using a pneumatic pump mounted in a water surface operation platform. The sludge containing large-size matters is delivered to the container-type sand-stone refuse separation device 38 by the sludge delivery pipe 3 laid on the surface of the river. The water content rate of the sludge 4 with large-size matters removed is decreased from ≤95% to ≤75% by the container-type dehydration device 5.
The dehydrated sludge 4 having a water content rate of ≤75% is delivered to the storage container 6 and stored therein via the delivery facility D35, delivered from the storage container 6 to the container-type drying device 37 via the delivery facility E36 to decrease the water content rate of the sludge 4 from ≤75% to ≤40%, and then passed into the container-type carbonization device 7 for carbonization to produce biochar.
Large-size matters 39 discharged from the container-type sand-stone refuse separation device 38 are delivered to the container-type pulverization device 11 for pulverization via the delivery facility F40. The pulverized large-size matters 39 are delivered to the container-type dehydration device 5 for dehydration via the delivery facility B33. The dehydrated large-size matters 39 are delivered to the storage container 6 and stored therein via the delivery facility C34, delivered from the storage container 6 to the container-type drying device 37 via the delivery facility E36 to decrease the water content rate of the sludge 4 from ≤75% to ≤40%, and then passed into the container-type carbonization device 7 for carbonization to produce biochar.
River surface floats and river bank refuse 10 are cleared away by the cleaning ship 9. The resulted river surface floats and river bank refuse 10 are delivered to the container-type pulverization device 11 for pulverization via the delivery facility A32. The pulverized river surface floats and river bank refuse 10 are delivered to the container-type dehydration device 5 for dehydration via the delivery facility B33. The dehydrated river surface floats and river bank refuse 10 are delivered to the storage container 6 and stored therein via the delivery facility C34, delivered from the storage container 6 to the container-type drying device 37 via the delivery facility E36 to decrease the water content rate of the sludge 4 from ≤75% to ≤40%, and then passed into the container-type carbonization device 7 for carbonization to produce biochar.
The biochars 8 produced from the carbonized sludge 4 and the river surface floats and river bank refuse 10 are delivered back to the river bed of the segment 1 of the black and odorous river to be treated to absorb nitrogen as ammonia form, phosphorus, and the like generated by degradation of organic matters in the river bed, and thereby cleaning river water.
The sewage water 17 discharged from the container-type dehydration device 5 is delivered to the container-type flocculation device 13 for flocculation treatment.
The sewage water 17 after flocculation treatment is delivered to the container-type precipitation device 14 for precipitation treatment, and then delivered to the container-type activated coke filtration and adsorption device 15 for purification treatment of filtration and adsorption, and then discharged back to the river.
Black and odorous river water is withdrawn from one end of a segment 1 of a black and odorous river to be treated with a water pump 12, and delivered to the container-type flocculation device 13 for flocculation treatment via the delivery pipelines 16A. The black and odorous river water after flocculation treatment is delivered to the container-type precipitation device 14 for precipitation treatment. It is delivered to the container-type activated coke filtration and adsorption device 15 for purification treatment of filtration and adsorption, and then discharged back to the river at the other end of the river segment via the delivery pipelines 16B after a water quality standard for river water specified by a local government, i.e., the water quality standard for type III surface water in “Environmental quality standards for surface water” GB3838-2002, is reached. After several cycles of purification treatments, the water quality of the treated segment 1 of the black and odorous river is finally overall recovered to the river water quality standard specified by the local government, i.e., the water quality standard for type III surface water in “Environmental quality standards for surface water” GB3838-2002.
This disclosure can treat the pollution of black and odorous rivers, improve the self-cleaning capacity of river water, and recover the ecological balance of rivers and ambient environments thereof.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201610255147.4 | Apr 2016 | CN | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2017/081242 | 4/20/2017 | WO | 00 |
