Patent Application
20200209125
The present application relates to a sampling device, in particular, to a fractionation gas sampling device.
Conventional fractionation gas sampling devices are always used for sampling gas in a gas pipeline or device, and then introducing the sampled gas into the sampling pipe before analyzing and detecting those gases in the sampling pipe.
The existing fractionation gas sampling devices generally adopt a heat exchange unit or heat exchanger, but there is also a need to make improvements of the gas sampling devices due to some shortcomings existed in the prior art as below: the area of the heat exchanger is small, the liquid columns generate easily in the tube by the cooling liquids, and the heat exchange efficiency is relatively low; a decoking head is easily clamped and blocked when the decoking head moves in a reciprocating mode as a result of the low concentricity of the decoking head and the coking pipe; and the fault rate is always high due to the facts that there is no steam purging or the inner surface of the pipeline cannot be cleaned thoroughly in time, thereby causing the required maintenance frequency is very high.
In view of those above defects or shortcomings in the prior art, the present application provides a fractionation gas sampling device, which has a larger heat exchange area and a high heat exchange efficiency, moreover, there is no liquid columns generated in the tubes thereof, and correspondingly a coke cleaning mechanism is not prone to being clamped or blocked.
In one aspect, the present application provides a fractional gas sampling device comprising a heat exchanger, wherein the heat exchanger comprises one or more groups of tubes, and a guide plate is disposed in each tube.
In further, each group of tubes comprises a plurality of a first pipes, and a guide plate is configured in each first pipe.
The guide plate is spiral, runs through the first pipe, and contacts with the inner wall of the first pipe.
There is a guide plate configured in each first pipe.
All the guide plates are respectively and independently configured in a spiral shape along the inner wall of the first pipe.
One end of the tubes is connected to the inlet of the gas samples, and the other end of the tubes is connected to an outlet of the gas samples. In further, one end of the tubes is connected to the inlet of the gas samples via pipe connectors.
In another aspect, the present application provides a fractionation gas sampling device, the fractionation gas sampling device also comprises a coke cleaning mechanism optionally, wherein, the coke cleaning mechanism has a decoking head with a circular arc guide at its top.
The coke cleaning mechanism also includes a rod and a cylinder, wherein, one end of the rod is fixedly connected to the decoking head so as to make the decoking head move back and forth in the pipe through which the gas samples flow; the other end of the rod is fixedly connected to the cylinder. More specifically, during a sampling process, the gas samples flow successively through a second pipe, pipe connectors and a first pipe, and the decoking head preferably moves back and forth in the second pipe for carrying out decoking process.
Alternatively, the coke cleaning mechanism may be separately configured as a coke cleaning mechanical mechanism. Preset the starting time and running time of the decoking process according to the coking conditions in the pipes, and then select the starting point and the running pipes.
The decoking head has two or more than two flaky cutting tools arranged in a circular arc. Wherein, the cutting tool may be selected from a circular blade, a long blade, an arc blade, a tooth-shaped blade, a trapezoidal blade, a corrugated blade, a serrated blade, a disc blade, an irregular blade or any one of the combinations thereof.
In the fractionation gas sampling device, the tube heat exchanger also has an entrance. The entrance and the tube are connected. Wherein, by utilizing pipe connectors, the entrance is connected to the first pipe of the tube.
In further, the entrance is connected to the top of the first pipe. More specifically, the entrance is also connected to the outlet of gas samples.
Preferably, each group of the tubes includes 7-9 pipes.
Preferably, the diameter of the first pipe is 10-12.7 mm.
The diameter of the second pipe is larger than that of the first pipe.
The fractionation gas sampling device according to the present application comprises at least one group of tubes, and a guide plate is disposed within each group of tubes, thereby the fractionation gas sampling device has a larger heat exchange area, overcomes the surface tension between liquids by the guide plates, ensures the liquids generate no liquid columns in the tubes thereof, and increases the heat exchange efficiency.
Moreover, by combining with a coke cleaning mechanism that has a decoking head in a circular arc guide, the fractionation gas sampling device not only achieves excellent technical effects relevant to decoking, but also effectively prevents from a clamping and blocking phenomenon of the decoking head, thereby realizing an automatic cleaning of coke in a much longer period.
Other technical features, purposes and advantages of the present application will become more apparent by reading the detailed descriptions of the non-restrictive embodiments and referring to the attached drawings as below:
In
The present application shall be further described in details in combination with the attached drawings and specific embodiments. It should be understood that, the specific embodiments described herein are used only to explain the relevant embodiments of the invention, but is not intended to limit the present invention. It should also be noted that, for ease of description, only some parts related to the present invention are shown in the attached drawings.
It should be noted that, without conflicts, in the present application the characteristics or features of the embodiments and the specific examples may be used adaptably either alone or in combination with each other. The present application shall be illustrated in details by referring to the attached drawings and embodiments.
In one embodiment, the present application provides a fractional gas sampling device comprising a heat exchanger, wherein the heat exchanger comprises one or more groups of tubes, a guide plate is disposed in each tube.
In further, each group of tubes comprises a plurality of a first pipes, and the guide plate is configured in each first pipe. The guide plate is spiral, and runs through the first pipe, and contacts with the inner wall of the first pipe.
There is a guide plate configured in each first pipe. The guide plate has a width depending on the inner radius of the first pipe. All the guide plates are respectively and independently configured in a spiral shape along the inner wall of the first pipe in which the guide plate may be configured in parallel or crossways.
One end of the first pipes in the tubes is connected to the inlet of the gas samples, and the other end of the tubes is connected to an outlet of the gas samples. In further, one end of the tubes is connected to the inlet of the gas samples via pipe connectors.
In another embodiment, the present application provides a fractionation gas sampling device, the fractionation gas sampling device also comprises a coke cleaning mechanism, wherein, the coke cleaning mechanism has a decoking head with a circular arc guide at its top.
The coke cleaning mechanism also includes a rod and a cylinder, wherein, one end of the rod is fixedly connected to the decoking head so as to make the decoking head move back and forth in the pipe through which the gas samples flow; the other end of the rod is fixedly connected to the cylinder. More specifically, during the sampling process, the gas samples flow successively through a second pipe, pipe connectors and a first pipe, and the decoking head preferably moves back and forth in the second pipe for carrying out decoking process.
The starting or running of the coke cleaning mechanism can be controlled according to the properties of the sample gas or the test conditions and the like. It can also be controlled by a control system, for example, a numerical control system, or a transmission mechanism assisted manually such as a control valve of cylinder.
Alternatively, the coke cleaning mechanism may be separately configured as a coke cleaning mechanical mechanism. Specify the starting time and running time of the decoking process according to the coking conditions in the pipes, and then select the starting point and the running pipes.
The decoking head has two or more flaky cutting tools arranged in a circular arc. Wherein, the cutting tool may be selected from a circular blade, a long blade, an arc blade, a tooth-shaped blade, a trapezoidal blade, a corrugated blade, a serrated blade, a disc blade, an irregular blade or any one of the combinations thereof.
In the fractionation gas sampling device, the tube heat exchanger also has an entrance. The entrance and the tube are connected with each other. Wherein, by utilizing pipe connectors, the entrance is also connected to the first pipe of the tubes.
In further, the entrance is connected to the top of the first pipe. More specifically, the entrance is also connected to the outlet of gas samples.
Preferably, each group of the tubes includes 7-9 pipes.
Preferably, the diameter of the first pipe is 10-12.7 mm.
The diameter of the second pipe is often larger than that of the first pipe.
In the above embodiment, the fractionating gas sampling device also comprises a coke cleaning mechanism 2, which includes a decoking head 4 having a circular arc guide, a cylinder 5 and a rod 12, wherein, cylinder 5 may be selectively placed in the shell 10 or not; One end of the rod 12 is fixedly connected to cylinder 5 and the other end is connected to the decoking head 4, thus allowing the decoking head 4 to move back and forth in the pipe through which gas samples flow (for example, in the second pipe 13 or part of the second pipe 13). The decoking head 4 has two or more cutting tools arranged in a circular arc, such as cutting edges.
Specifically, the decoking head 4 is located inside of the inlet 6 of gas samples. It can enter into the second pipe 13 and then moves back and forth in the second pipe 13 so as to remove coke and the like from the pipe wall.
The fractionating gas sampling apparatus also comprises an inlet 8 from which a steam fluid is fed into the pipe for purging the dirty in the pipe. The inlet 8 may be configured at the top of the tubes, and the inlet 8 may be connected to the tubes. Specifically, the inlet 8 can be connected to the first pipe 3 via the pipe connectors. Moreover, the inlet 8 can also be connected to the outlet 7 of gas samples.
The present application utilizes at least one group of tubes. Compared with the existing sampling devices, in the present application the heat exchanger increases the heat exchange area thereof, and improves the heat exchange efficiency. The cooling medium herein may use a coolant (e.g. water or oil) or gas (e.g. colded air or other colded gas).
A coke cleaning mechanism provided by the present application has a decoking head with a circular arc guide at its top. The decoking head has two or more than two cutting edges arranged in a circular arc. The cutting edge may be a chamfer edge. It achieves better technical effects relevant to decoking, but also effectively prevents from the decoking head being clamped and blocked. And it increases the heat exchange efficiency by use of pumping the flows (for example, high-pressure gas flow, or steam flow) and sweeping the dirty on the inner surface of the first pipe.
The inlet is located at the lower end of the tube heat exchanger, from which the gas samples may be pumped in the device. The outlet of the gas samples and the entrance of the cleaning gas are located at the top of the tube heat exchanger. This structure is helpful for the placement of the equipment and the connection of the pipes. The inlet is located at the lower end of the coke cleaning mechanism and connected to the first pipe of the tube heat exchanger.
In combination with
In this embodiment, each group of tubes includes 7-9 the first pipes.
Preferably, the diameter of the first pipe is 10-12.7 mm.
The tube heat exchanger in the present application further significantly enlarges the heat exchange area and increases the heat exchange efficiency by providing a plurality of the first pipes.
In this embodiment, the cutting tool on decoking head 4 may also be a chamfered edge.
The decoking head in the present application is constructed into a circular arc shape as a whole, which can avoid a stuck phenomenon of the decoking head caused by protrusions at the pipe surface, thereby achieving excellent coke cleaning effects. Common protrusions formed on the surface of pipes include protrusions caused by welding process or partially-open valve, or coke deposition of air inlet pipes and the surface thereof. The circular arc decoking head plays guide and correction roles, and it makes those partially-open valves open entirely or moves through the welding protrusions thereby preventing the blade of the decoking head from being damaged. In addition, by using this circular arc decoking head, the decoking operation and recycling operation is smoother. Considering the above features, the fractionation gas sampling device of the present application can be operated for a long period. When in use, the device shall be installed above the gas pipes or the device required sampling. Gases at a high temperature rise from the bottom of the device into the tubes of the tube type heat exchanger. After exchanging heat with the cooling medium outside the tubes, part of the medium with high condensation temperature in those high temperature gases shall be condensed at first and return to a withdrawing tube. When the components having an easy coke formation among the high-temperature gases, which are more likely to become solid or viscous liquid phases, adhere to the sampling tube, they can be removed from the wall of the pipes by the coke cleaning mechanism, and then further removed to the withdrawing pipes. In order to clean up those substances easily adhered to the inner wall, it may take use of steam purging way to clean the inner wall of pipes in the tubes, thereby removing the scaling substances of the surface and improving the heat exchange efficiency.
The above description only provides some preferred embodiments, and “a” or “an” used in the mechanism or device not only refers to a singular, but also comprises the plural or multiple meanings thereof. The protection scope of the present application comprises any combination of the above technical features, but is not limited to this. Meanwhile, in the case that does not divorce from the inventive concept of the present application, it should cover any combination of the above technical features, identical technical features, and other technical features modified or amended appropriately, for example, a technical solution formed by replacing the above features with the technical features with similar functions disclosed in the present application (but not limited to this).
| Number | Date | Country | Kind |
|---|---|---|---|
| 201822249573.4 | Dec 2018 | CN | national |
