Gas sampling device in coal coking process

Abstract

The utility model provides a coal coking process gas sampling device, and relates to the technical field of coal coking gas sampling, the coal coking process gas sampling device comprises a gas transmission assembly and a sampling assembly, when the coal coking process gas sampling device is used, a sampling sleeve is communicated to a collection pipeline, coal coking gas firstly passes through a spiral flow guide part to form spiral airflow, and therefore large-particle dust wrapped by the gas is thrown to the pipe wall through inertia; tar is filtered through the tar capturing piece, so that sampled gas is obtained and collected into the collecting gas tank, and the sampled gas passes through the heat tracing sleeve in the filtering process, so that the interior of a pipeline of the sampling sleeve is always kept at a proper temperature in the gas filtering and collecting process, the gas and tar fog drops are prevented from being cooled and solidified, and the filtering efficiency is improved; and after the device is used for a period of time, nitrogen is filled into the sampling sleeve through the self-cleaning back-flushing part, and meanwhile, tar remaining after filtration is gasified through the tar capturing part, and filtered tar impurities are conveyed to the opening of the sampling sleeve, so that the pipeline does not need to be manually and frequently cleaned.

Description

Technical Field

[0001] This application relates to the field of coal coking gas sampling technology, and more specifically, to a coal coking process gas sampling device. Background Technology

[0002] Coal coking, also known as high-temperature carbonization of coal, is a coal conversion process that uses coal as raw material. Under air-isolated conditions, the coal is heated to approximately 950°C and carbonized to produce coke. Simultaneously, it yields coking gas, coal tar, and recovers other chemical products. Coking gas is an important gaseous fuel in integrated iron and steel enterprises; its main components are hydrogen and methane. Hydrogen for chemical synthesis and methane as a substitute for natural gas can be separated from the coking gas.

[0003] Before recovering coal coking gas, it is necessary to sample and analyze the gas to determine its composition in order to better separate and recover it. However, during the collection process, the gas often carries impurities such as solid particles and tar droplets.

[0004] In the prior art, the coal coking gas sampling device with publication number CN220251463U uses a filter assembly between the coal coking gas pipe and the gas storage tank. The filter screen in the filter assembly can filter solid impurities in the coal coking gas, preventing solid impurities from entering the gas storage tank through the inlet pipe and affecting gas sampling or blocking the gas inlet and outlet channels of the gas storage tank. However, in the prior art, impurities are filtered using only a simple filter screen, resulting in low filtration efficiency. Moreover, the filtered impurities easily clog the filter screen, requiring frequent manual removal for cleaning or replacement. Furthermore, tar droplets easily cool and solidify in the pipeline, leading to pipe blockage and other problems. Therefore, this technology has shortcomings. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a gas sampling device for the coal coking process, which can filter impurities in stages, improve filtration efficiency, and solve the problems of tar blockage and filter screen blockage, eliminating the need for frequent manual cleaning and replacement.

[0006] This application is implemented as follows:

[0007] A gas transmission assembly, comprising a coal coke gas pipe and a collection pipe, wherein the collection pipe is fixedly connected to the coal coke gas pipe;

[0008] The sampling assembly includes a sampling sleeve, a spiral guide, a tar trap, a heat tracing sleeve, a self-cleaning backflushing element, and a gas collection tank. The sampling sleeve is fixedly connected to the end of the collection pipe. The output ends of the spiral guide, the tar trap, and the self-cleaning backflushing element are sequentially disposed inside the sampling sleeve. The heat tracing sleeve is sleeved on the sampling sleeve. The gas collection tank is fixedly connected to the end of the sampling sleeve.

[0009] In one embodiment of this application, the spiral guide includes a spiral pipe and spiral blades. The spiral pipe is fixedly sleeved inside the sampling sleeve and is located at the front end of the tar capture device. The spiral blades are fixedly connected inside the spiral pipe.

[0010] In one embodiment of this application, the tar capture device includes a multi-layer porous ceramic plate and a heating wire. The multi-layer porous ceramic plate is placed sequentially inside the sampling sleeve, and the multi-layer porous ceramic plate is located at the rear end of the spiral guide. The heating wire is uniformly deployed on the multi-layer porous ceramic plate.

[0011] In one embodiment of this application, the heat tracing sleeve is an electric heat tracing cable, which is wound around the sampling sleeve.

[0012] In one embodiment of this application, the self-cleaning backflushing component includes a nitrogen inlet pipe, a nitrogen pump, and a nitrogen storage tank. The port of the nitrogen inlet pipe is fixedly connected to the inside of the sampling sleeve, and the port of the nitrogen inlet pipe is located at the rear end of the tar capture component. The nitrogen pump is installed on the nitrogen inlet pipe, and the nitrogen storage tank is fixedly connected to the nitrogen inlet pipe.

[0013] In one embodiment of this application, the gas collection tank includes a collection chamber, a tank body, and an exhaust pipe. The collection chamber is fixedly connected to the tail end of the sampling sleeve, the collection chamber is fixedly connected to the top end of the tank body, and the exhaust pipe is fixedly connected to the top end of the collection chamber.

[0014] In one embodiment of this application, an exhaust valve is provided on the exhaust pipe, and a pressure detection valve is provided on the tank body.

[0015] In one embodiment of this application, a gas concentration detector is inserted into the sampling sleeve.

[0016] In one embodiment of this application, the sampling sleeve and the collection pipe are both fixed with connecting flanges, and the sampling sleeve and the collection pipe are sealed together by the connecting flanges.

[0017] In one embodiment of this application, both the collection pipe and the sampling sleeve are equipped with air valves at their front ends.

[0018] The beneficial effects of this application are as follows: During use, the sampling sleeve is connected to the collection pipeline. The coal tar gas first forms a spiral airflow through the spiral guide, thereby throwing large dust particles carried by the gas onto the pipe wall by inertia. Then, it passes through the tar capture device to filter the tar, thus obtaining the sampled gas, which is collected in the collection tank. Furthermore, during the filtration process, a heating sleeve ensures that the pipe inside the sampling sleeve maintains a suitable temperature throughout the filtration and collection process, preventing the gas and tar droplets from cooling and solidifying. This device improves filtration efficiency through staged filtration using the spiral guide and tar capture devices. After a period of use, the sampling gas pump is turned off, and nitrogen is injected into the sampling sleeve through the self-cleaning backflushing device. This backflushes the internal pipeline of the sampling sleeve, while the tar capture device vaporizes the filtered residual tar. The nitrogen backflushing then transports the filtered tar impurities in the pipeline to the sampling sleeve port. This eliminates the need for frequent manual cleaning of the pipeline and filter structure, solving the problems of low filtration efficiency, easy clogging of the filter screen by the filtered impurities, frequent manual removal for cleaning or replacement, and easy cooling and solidification of tar droplets in the pipeline, leading to pipeline blockage, in existing technologies. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This application provides a schematic diagram of the structure of a gas sampling device for a coal coking process.

[0021] Figure 2 A schematic diagram of the gas delivery assembly is provided for the embodiments of this application;

[0022] Figure 3 A schematic diagram of the sampling component is provided for the embodiments of this application;

[0023] Figure 4 A schematic diagram of the spiral guide component is provided for the embodiments of this application;

[0024] Figure 5 A structural schematic diagram of the self-cleaning backflush component is provided for the embodiments of this application;

[0025] In the diagram: 100-Gas delivery assembly; 110-Coal and coke gas pipe; 120-Collecting pipe; 130-Connecting flange; 140-Gas valve; 200-Sampling assembly; 210-Sampling sleeve; 220-Helical guide component; 221-Helical pipe; 222-Helical blade; 230-Tar capture component; 231-Multi-layer porous ceramic plate; 232-Heating wire; 240-Heating sleeve; 250-Self-cleaning backflushing component; 251-Nitrogen inlet pipe; 252-Nitrogen pump; 253-Nitrogen storage tank; 260-Gas collection tank; 261-Collection chamber; 262-Tank body; 263-Exhaust pipe; 264-Exhaust valve; 265-Pressure detection valve; 270-Gas concentration detector; Detailed Implementation

[0026] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0027] like Figures 1-5 As shown, a gas sampling device for a coal coking process according to an embodiment of this application includes:

[0028] Gas transmission assembly 100 includes a coal and coke gas pipe 110 and a collection pipe 120, with the collection pipe 120 fixedly connected to the coal and coke gas pipe 110.

[0029] The sampling assembly 200 includes a sampling sleeve 210, a spiral guide 220, a tar trap 230, a heating sleeve 240, a self-cleaning backflushing component 250, and a gas collection tank 260. The sampling sleeve 210 is fixedly connected to the end of the collection pipe 120. The output ends of the spiral guide 220, the tar trap 230, and the self-cleaning backflushing component 250 are sequentially arranged inside the sampling sleeve 210. The heating sleeve 240 is sleeved on the sampling sleeve 210. The gas collection tank 260 is fixedly connected to the end of the sampling sleeve 210. It should be noted that a gas collection pump is provided at the end of the gas collection tank 260 and the sampling sleeve 210. In use, the sampling sleeve 210 is connected to the collection pipe 120. The coal tar gas first forms a spiral airflow through the spiral guide 220, thereby throwing large dust particles carried by the gas onto the pipe wall by inertia. Then, it passes through the tar capture device 230 to filter the tar, thus obtaining the sampled gas, which is collected in the collection tank 260. During the filtration process, the heating sleeve 240 ensures that the pipe inside the sampling sleeve 210 maintains a suitable temperature throughout the filtration and collection process, ensuring that the gas and tar droplets do not cool and solidify. This device improves the filtration efficiency through staged filtration using the spiral guide 220 and the tar capture device 230. After a period of use, the sampling gas pump is turned off, and nitrogen is injected into the sampling sleeve 210 through the self-cleaning backflushing component 250, thereby backflushing the internal pipeline of the sampling sleeve 210. At the same time, the tar capture component 230 vaporizes the filtered residual tar, and the nitrogen backflushing transports the filtered tar impurities in the pipeline to the port of the sampling sleeve 210. This eliminates the need for frequent manual cleaning of the pipeline and filter structure, solving the problems of low filtration efficiency, easy clogging of the filter screen by the filtered impurities, frequent manual removal for cleaning or replacement, and easy cooling and solidification of tar droplets in the pipeline, leading to pipeline blockage, in the existing technology.

[0030] like Figure 2 As shown, the sampling sleeve 210 and the collection pipe 120 are both fixed with connecting flanges 130, and the front end of the sampling sleeve 210 and the end of the collection pipe 120 are sealed together by the connecting flanges 130. The connecting flanges 130 enhance the sealing performance at the connection. Both the collection pipe 120 and the front end of the sampling sleeve 210 are equipped with air valves 140. The air valves 140 are used to control the entry of coal tar gas into the sampling sleeve 210.

[0031] like Figure 3As shown, the heating sleeve 240 is an electric heating tape, which is wound around the sampling sleeve 210. The electric heating tape heats the wall of the sampling sleeve 210, thereby raising the temperature of the tubing inside the sampling sleeve 210 to a certain level, ensuring that the gas and tar droplets do not cool down during sampling. A gas concentration detector 270 is inserted into the sampling sleeve 210. The gas concentration detector 270 is used to detect the gas concentration inside the sampling sleeve 210, thereby preventing excessive gas concentration and pressure inside the sampling sleeve 210 from causing danger.

[0032] like Figure 4 As shown, the spiral guide component 220 includes a spiral pipe 221 and spiral blades 222. The spiral pipe 221 is fixedly sleeved inside the sampling sleeve 210 and is located at the front end of the tar capture component 230. The spiral blades 222 are fixedly connected inside the spiral pipe 221. When the coal tar gas passes through the spiral pipe 221, the spiral blades 222 cause the airflow to form a spiral rotation airflow, which causes large particulate dust impurities carried in the coal tar gas to be thrown onto the spiral blades 222 and the spiral pipe 221 due to inertia.

[0033] Furthermore, the tar trapping element 230 includes a multi-layer porous ceramic plate 231 and a heating wire 232. The multi-layer porous ceramic plate 231 is placed sequentially inside the sampling sleeve 210 and is located at the rear end of the spiral guide element 220. The heating wire 232 is evenly distributed on the multi-layer porous ceramic plate 231. The multi-layer porous ceramic plate 231 consists of multiple porous ceramic plates. When gas passes through, tar droplets cannot pass through, thus filtering out the tar and obtaining the sampled gas. During cleaning, the heating wire 232 can re-vaporize the tar attached to the multi-layer porous ceramic plate 231, thereby facilitating cleaning.

[0034] like Figure 5 As shown, the self-cleaning backflushing component 250 includes a nitrogen inlet pipe 251, a nitrogen pump 252, and a nitrogen storage tank 253. The port of the nitrogen inlet pipe 251 is fixedly connected to the sampling sleeve 210, and the port of the nitrogen inlet pipe 251 is located at the rear end of the tar capture component 230. The nitrogen pump 252 is installed on the nitrogen inlet pipe 251, and the nitrogen storage tank 253 is fixedly connected to the nitrogen inlet pipe 251. After a period of use, when there is too much tar residue on the multi-layer porous ceramic plate 231, affecting the filtration efficiency, the nitrogen storage tank 253 is connected to the nitrogen inlet pipe 251. The nitrogen pump 252 fills the sampling sleeve 210 with nitrogen gas from the nitrogen storage tank 253. The nitrogen gas impacts the end connected to the collection gas tank 260 and the end connected to the collection pipe 120, thereby forming a backflushing airflow, which backflushes the tar gas on the multi-layer porous ceramic plate 231, thus automatically cleaning it without the need for frequent manual cleaning or replacement.

[0035] Furthermore, the gas collection tank 260 includes a collection chamber 261, a tank body 262, and an exhaust pipe 263. The collection chamber 261 is fixedly connected to the tail end of the sampling sleeve 210, and the top end of the tank body 262. The exhaust pipe 263 is fixedly connected to the top end of the collection chamber 261. After filtration, the gas enters the tank body 262 through the collection chamber 261, thus completing the sampling. An exhaust valve 264 is installed on the exhaust pipe 263, and a pressure detection valve 265 is installed on the tank body 262. The pressure detection valve 265 is used to detect the gas in the tank body 262. When the pressure is too high, the gas is urgently discharged from the exhaust pipe 263 through the exhaust valve 264.

[0036] In summary, the working principle of a gas sampling device for a coal coking process according to this utility model embodiment is as follows: During use, the sampling sleeve 210 is connected to the collection pipe 120. When the coal coking gas passes through the spiral pipe 221, the spiral blades 222 cause the airflow to rotate in a spiral motion, causing large particles of dust and impurities carried in the coal coking gas to be thrown onto the spiral blades 222 and the spiral pipe 221 due to inertia. The gas then passes through multiple layers of porous ceramic plates 231 to filter out tar, thus obtaining the sampled gas, which is collected in the collection tank 260. During the filtration process, a heating sleeve 240 ensures that the pipe inside the sampling sleeve 210 maintains a suitable temperature throughout the filtration and collection process, preventing the gas and tar droplets from cooling and solidifying. This device improves filtration efficiency through staged filtration using the spiral blades 222 and multiple layers of porous ceramic plates 231. After a period of time, the sampling gas pump is turned off, and the nitrogen storage tank 253 is connected to the nitrogen inlet pipe 251. The nitrogen pump 252 fills the sampling sleeve 210 with nitrogen from the nitrogen storage tank 253. The nitrogen gas impacts the end connected to the collection gas tank 260 and the end connected to the collection pipe 120, thereby forming a backflow airflow, which in turn impacts the internal pipe of the sampling sleeve 210. At the same time, the heating wire 232 can re-vaporize the tar attached to the multi-layer porous ceramic plate 231. The nitrogen backflow transports the filtered tar impurities in the pipe to the port of the sampling sleeve 210, thus eliminating the need for frequent manual cleaning of the pipe and filter structure. This solves the problems of low filtration efficiency, easy clogging of the filter screen by the filtered impurities, frequent manual removal for cleaning or replacement, and easy cooling and solidification of tar droplets in the pipe, leading to pipe blockage, when filtering impurities with a filter screen in the existing technology.

[0037] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

Claims

1. A gas sampling device for coal coking process, characterized in that, include: A gas transmission assembly (100) includes a coal and coke gas pipe (110) and a collection pipe (120), wherein the collection pipe (120) is fixedly connected to the coal and coke gas pipe (110); The sampling assembly (200) includes a sampling sleeve (210), a spiral guide (220), a tar trap (230), a heat tracing sleeve (240), a self-cleaning backflushing element (250), and a gas collection tank (260). The sampling sleeve (210) is fixedly connected to the end of the collection pipe (120). The output ends of the spiral guide (220), the tar trap (230), and the self-cleaning backflushing element (250) are sequentially arranged inside the sampling sleeve (210). The heat tracing sleeve (240) is sleeved on the sampling sleeve (210). The gas collection tank (260) is fixedly connected to the end of the sampling sleeve (210).

2. The gas sampling device for coal coking process according to claim 1, characterized in that, The spiral guide (220) includes a spiral pipe (221) and a spiral blade (222). The spiral pipe (221) is fixedly sleeved inside the sampling sleeve (210), and the spiral pipe (221) is located at the front end of the tar capture device (230). The spiral blade (222) is fixedly connected inside the spiral pipe (221).

3. The gas sampling device for coal coking process according to claim 1, characterized in that, The tar trap (230) includes a multi-layer porous ceramic plate (231) and a heating wire (232). The multi-layer porous ceramic plate (231) is placed sequentially inside the sampling sleeve (210), and the multi-layer porous ceramic plate (231) is located at the rear end of the spiral guide (220). The heating wire (232) is evenly deployed on the multi-layer porous ceramic plate (231).

4. The gas sampling device for coal coking process according to claim 1, characterized in that, The heat tracing sleeve (240) is an electric heat tracing cable, which is wrapped around the sampling sleeve (210).

5. A gas sampling device for coal coking process according to claim 1, characterized in that, The self-cleaning backflushing component (250) includes a nitrogen inlet pipe (251), a nitrogen pump (252), and a nitrogen storage tank (253). The port of the nitrogen inlet pipe (251) is fixedly connected to the sampling sleeve (210), and the port of the nitrogen inlet pipe (251) is located at the rear end of the tar capture component (230). The nitrogen pump (252) is installed on the nitrogen inlet pipe (251), and the nitrogen storage tank (253) is fixedly connected to the nitrogen inlet pipe (251).

6. A gas sampling device for coal coking process according to claim 1, characterized in that, The gas collection tank (260) includes a collection chamber (261), a tank body (262), and an exhaust pipe (263). The collection chamber (261) is fixedly connected to the tail end of the sampling sleeve (210), the collection chamber (261) is fixedly connected to the top end of the tank body (262), and the exhaust pipe (263) is fixedly connected to the top end of the collection chamber (261).

7. A gas sampling device for coal coking process according to claim 6, characterized in that, An exhaust valve (264) is provided on the exhaust pipe (263), and a pressure detection valve (265) is provided on the tank (262).

8. A gas sampling device for coal coking process according to claim 1, characterized in that, A gas concentration detector (270) is inserted into the sampling sleeve (210).

9. A gas sampling device for coal coking process according to claim 1, characterized in that, Both the front end of the sampling sleeve (210) and the end of the collection pipe (120) are fixed with connecting flanges (130), and the front end of the sampling sleeve (210) and the end of the collection pipe (120) are sealed together by the connecting flanges (130).

10. A gas sampling device for coal coking process according to claim 1, characterized in that, Both the front end of the collection pipe (120) and the sampling sleeve (210) are equipped with air valves (140).

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