A natural gas production waste gas treatment device based on high-efficiency activated carbon
By designing a waste gas treatment device that combines pretreatment, spraying, and multi-stage adsorption, the problems of activated carbon pore blockage and substandard waste gas treatment were solved, achieving stable and compliant emissions and deep purification of waste gas.
Patent Information
- Application Number
- CN202611192384.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-08-07
- Publication Date
- 2026-11-03
AI Technical Summary
Existing waste gas treatment devices lack pretreatment structures, which leads to pore blockage of activated carbon, reduced adsorption capacity, and difficulty in consistently meeting emission standards. They also lack tail gas recirculation and fine treatment mechanisms, making it impossible to achieve secondary deep treatment.
A waste gas treatment device based on high-efficiency activated carbon was designed, including a pretreatment mechanism, a spray treatment mechanism, and an adsorption mechanism. Through dust removal, buffering, spraying, and multi-stage adsorption, combined with a detection and reflux component, the waste gas can be purified and treated in stages.
It effectively removes solid and liquid impurities from the exhaust gas, avoids clogging of activated carbon pores, achieves stable and compliant emissions and deep purification of the exhaust gas, and ensures emission quality.
Smart Images
Figure CN123024381A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of waste gas treatment technology, specifically relating to a waste gas treatment device for natural gas production based on high-efficiency activated carbon. Background Technology
[0002] Coke oven gas to natural gas is one of the core technologies for the resource utilization of coal chemical industry and the realization of green and low-carbon development of the coking industry. It can convert coke oven gas, a by-product of coking, into clean natural gas products, effectively improving energy utilization and reducing environmental pollution caused by direct emissions of industrial waste gas. However, in the industrial production process of purifying coke oven gas to produce natural gas, the raw material coke oven gas has a complex composition, containing a large number of pollutants such as tar droplets, water vapor, dust particles, sulfides, and hydrocarbon impurities. Even after multiple processes such as conversion, purification, and compression, a large amount of production waste gas will still be generated. The waste gas not only contains gaseous organic pollutants, sulfur-containing and nitrogen-containing harmful gases, but also carries a large amount of fine dust and solid-liquid impurities such as liquid water mist and tar droplets. If it is not effectively purified, it will cause significant pollution. Direct emission of waste gas would severely pollute the atmospheric environment and fail to meet industrial environmental emission standards. Therefore, waste gas needs to be treated before it is discharged to meet the emission standards. However, existing waste gas treatment devices lack pretreatment structures. Liquid droplets and dust particles entrained in the waste gas will directly enter the activated carbon bed, clogging the pores of the activated carbon and causing a sharp drop in adsorption capacity in a short period of time. Moreover, most existing waste gas treatment devices are single-stage adsorption structures. When faced with high-concentration and complex waste gas, the outlet concentration fluctuates greatly and it is difficult to stably meet national emission standards. At the same time, there is a lack of tail gas recirculation and fine treatment mechanism, which cannot achieve secondary deep treatment. Therefore, there is an urgent need for a natural gas production waste gas treatment device based on high-efficiency activated carbon to solve the above problems. Summary of the Invention
[0003] In view of the problems mentioned above in the background art, the purpose of this invention is to provide a natural gas production waste gas treatment device based on high-efficiency activated carbon.
[0004] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows: A natural gas production waste gas treatment device based on high-efficiency activated carbon includes a pretreatment mechanism, a spray treatment mechanism, and an adsorption mechanism connected sequentially along the airflow direction. The pretreatment mechanism includes a pretreatment cylinder, an air inlet is installed on the lower side of the pretreatment cylinder, the air inlet is arranged along the tangential direction of the pretreatment cylinder, a dust removal component and a buffer component are arranged sequentially from bottom to top inside the pretreatment cylinder, a sewage discharge pipe is installed at the bottom of the pretreatment cylinder, and a first conveying pipe is installed at the top of the pretreatment cylinder, the output end of the first conveying pipe is connected to the input end of the spray treatment mechanism; The spray treatment mechanism includes a spray cylinder, a spray assembly is installed on the lower inside of the spray cylinder, a liquid removal assembly is installed on the upper inside of the spray cylinder, and a second conveying pipe is installed on the top side of the liquid removal assembly on the spray cylinder. The output end of the second conveying pipe is connected to the input end of the multi-stage adsorption mechanism. The adsorption mechanism includes an adsorption cylinder, in which a multi-stage adsorption assembly is installed. An air outlet pipe is installed on one side of the top of the multi-stage adsorption assembly. A detection reflux assembly is installed on the air outlet pipe, and the output end of the detection reflux assembly is installed on the spray cylinder.
[0005] Furthermore, the dust removal assembly includes a guide tube installed inside the lower side of the pretreatment cylinder, the output end of the air inlet is located inside the guide tube, a guide pipe is installed at the top center of the guide tube, and the top output end of the guide pipe is located below the buffer assembly. This structural design allows the gas to enter the guide tube tangentially and rotate, removing dust and impurities from the gas.
[0006] Furthermore, the buffer assembly includes several buffer plates arranged horizontally from bottom to top, each buffer plate having several buffer through holes, with the buffer through holes between adjacent buffer plates staggered. This structural design can provide step-by-step buffering for the airflow, reducing the gas velocity.
[0007] Furthermore, a manifold is installed on the inner top of the pretreatment cylinder, and the output end of the manifold is connected to the input end of the first delivery pipe. A first one-way valve is installed on the output end of the first delivery pipe. This structural design allows for the collection and guiding of gas for output.
[0008] Further specifying, the spray assembly includes an annular spray pipe installed inside the spray cylinder. An airflow channel is provided on the inner side of the annular spray pipe. Several evenly arranged spray heads are installed around the inner circumference of the airflow channel on the annular spray pipe. An adapter pipe is connected to the inlet end of the annular spray pipe. The outer side of the adapter pipe penetrates the spray cylinder and extends to its outer side. A delivery pump is installed at the inlet end of the adapter pipe. An assembly plate is installed at the bottom of the delivery pump and is mounted on the outer side of the spray cylinder. A suction pipe is connected to the inlet end of the delivery pump. The inlet end of the suction pipe is located at the inner bottom of the spray cylinder. A sealing seat is installed at the connection point of the suction pipe in the spray cylinder. This structural design allows for the spraying treatment of gas.
[0009] Furthermore, an annular mounting base is installed on the lower inner side of the spray cylinder, and a filter frame is mounted on the annular mounting base. The input end of the suction pipe is located at the bottom of the filter frame, and a flared guide seat (wider at the top and narrower at the bottom) is installed on the top of the filter frame. This structural design can isolate impurities and prevent them from entering the delivery pump.
[0010] Further specifying, the liquid removal assembly includes several baffles alternately arranged on the upper side of the annular spray pipe, with a liquid removal channel between adjacent baffles. A wire mesh demister is located at the top of the uppermost baffle, and both the baffles and the wire mesh demister are installed inside the upper side of the spray cylinder. This structural design extends the gas flow path and removes liquid droplets carried in the gas.
[0011] Further specifying, the multi-stage adsorption assembly includes a gas distributor installed at the bottom of the adsorption cylinder. The input end of the gas distributor is connected to the output end of the second delivery pipe. Inside the adsorption cylinder, at the top output end of the gas distributor, several uniformly arranged perforated plates are installed. Between adjacent perforated plates, coal-based columnar activated carbon, honeycomb activated carbon, and coconut shell granular activated carbon are installed sequentially from bottom to top. This structural design allows for the adsorption treatment of gases.
[0012] Further specifying, the detection reflux assembly is installed on the online detector at the inlet of the exhaust pipe, and a reflux pipe is installed at the output end of the online detector. The output end of the reflux pipe is installed on the spray cylinder and located above the output end of the first delivery pipe. A second one-way valve is installed at the output end of the reflux pipe, and a switch valve is installed at the output end of the exhaust pipe. This structural design allows for the detection of emitted gases.
[0013] Furthermore, the top of the spray cylinder and the adsorption cylinder are equipped with a support bracket, and the top of the support bracket is installed at the bottom of the return pipe. This structural design can stably support the return pipe.
[0014] The beneficial effects of this invention are as follows: 1. This invention, through the setting of a pretreatment mechanism, allows waste gas to enter the guide tube through the tangential air inlet and form a high-speed vortex. Centrifugal force is used to remove large particles of dust and solid impurities first. Then, the gas passes through multiple layers of staggered buffer plates to gradually decelerate and change direction, making the airflow field uniform and stable. Then, the spray treatment mechanism captures fine dust and soluble pollutants. Finally, the gas passes through a two-stage liquid removal structure of baffle plates and wire mesh demister to deeply remove droplets and mist carried by the airflow. The multiple pretreatment processes can significantly reduce solid and liquid impurities such as dust and droplets in the waste gas, preventing them from directly entering the subsequent adsorption bed and clogging the pores of activated carbon.
[0015] 2. This invention employs an adsorption mechanism to uniformly disperse the waste gas to be adsorbed via a gas distributor, avoiding uneven adsorption caused by airflow deviation. The adsorption section utilizes a three-tiered structure arranged from bottom to top: coal-based columnar activated carbon, honeycomb activated carbon, and coconut shell granular activated carbon. This allows for the sequential targeted adsorption of large molecular organic pollutants and odors, small and medium molecular pollutants, and trace residual harmful components. 3. This invention sets up a detection and reflux component. The gas is monitored in real time by an online detector to check the pollutant concentration and emission indicators. When the gas meets the standards, it is directly discharged to the outside. When the gas does not meet the standards, the emission passage is closed. The unqualified gas is transported back to the spray cylinder through the reflux pipe. After mixing with the newly introduced waste gas, the entire process of spraying, liquid removal and adsorption is completed again until the gas meets the emission standards. Attached Figure Description
[0016] The present invention can be further illustrated by the non-limiting embodiments given in the accompanying drawings; Figure 1 This is a schematic diagram of the axial structure of a natural gas production waste gas treatment device based on high-efficiency activated carbon according to an embodiment of the present invention; Figure 2 This is a cross-sectional structural schematic diagram of a natural gas production waste gas treatment device based on high-efficiency activated carbon according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of the pretreatment cylinder of a natural gas production waste gas treatment device based on high-efficiency activated carbon according to an embodiment of the present invention. Figure 4 This is a schematic diagram of the internal structure of the spray cylinder of a natural gas production waste gas treatment device based on high-efficiency activated carbon according to an embodiment of the present invention. Figure 5 This is a schematic diagram of the internal structure of the adsorption cylinder of a natural gas production waste gas treatment device based on high-efficiency activated carbon according to an embodiment of the present invention; The symbols for the main components are explained below: Pretreatment unit 1, spray treatment unit 2, adsorption unit 3, pretreatment cylinder 4, air inlet 5, dust removal assembly 6, buffer assembly 7, drain pipe 8, first conveying pipe 9, spray cylinder 10, spray assembly 11, liquid removal assembly 12, second conveying pipe 13, adsorption cylinder 14, multi-stage adsorption assembly 15, air outlet pipe 16, detection and return assembly 17, guide cylinder 18, guide pipe 19, buffer plate 20, buffer through hole 21, manifold 22, first one-way valve 23, annular spray pipe 24. Airflow channel 25, spray head 26, transfer pipe 27, delivery pump 28, assembly plate 29, suction pipe 30, sealing seat 31, annular mounting seat 32, filter screen frame 33, trumpet-shaped guide seat 34, baffle plate 35, liquid removal channel 36, wire mesh demister 37, gas distributor 38, mesh carrier plate 39, coal-based columnar activated carbon 40, honeycomb activated carbon 41, coconut shell granular activated carbon 42, online detector 43, return pipe 44, second check valve 45, switch valve 46, support bracket 47. Detailed Implementation
[0017] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0018] Example 1, such as Figure 1 and Figure 2 As shown, a natural gas production waste gas treatment device based on high-efficiency activated carbon includes a pretreatment mechanism 1, a spray treatment mechanism 2 and an adsorption mechanism 3 connected in sequence along the airflow direction. The pretreatment mechanism 1 includes a pretreatment cylinder 4. An air inlet 5 is installed on the lower side of the pretreatment cylinder 4. The air inlet 5 is arranged along the tangential direction of the pretreatment cylinder 4. A dust removal component 6 and a buffer component 7 are arranged sequentially from bottom to top inside the pretreatment cylinder 4. A sewage pipe 8 is installed at the bottom of the pretreatment cylinder 4. A first conveying pipe 9 is installed at the top of the pretreatment cylinder 4. The output end of the first conveying pipe 9 is connected to the input end of the spray treatment mechanism 2. The spray treatment mechanism 2 includes a spray cylinder 10, a spray assembly 11 is installed on the lower side of the inside of the spray cylinder 10, a liquid removal assembly 12 is installed on the upper side of the inside of the spray cylinder 10, and a second conveying pipe 13 is installed on the top side of the liquid removal assembly 12. The output end of the second conveying pipe 13 is connected to the input end of the multi-stage adsorption mechanism 3. The adsorption mechanism 3 includes an adsorption cylinder 14, in which a multi-stage adsorption assembly 15 is installed. An air outlet pipe 16 is installed on one side of the top of the multi-stage adsorption assembly 15. A detection reflux assembly 17 is installed on the air outlet pipe 16. The output end of the detection reflux assembly 17 is installed on the spray cylinder 10.
[0019] In this embodiment, the waste gas generated during the process of purifying coke oven gas to produce natural gas is sent into the pretreatment mechanism 1 through the tangentially set air inlet 5. The dust removal component 6 inside the pretreatment cylinder 4 uses centrifugal force to separate large particles of dust and solid impurities in the waste gas. The impurities collected by sedimentation are periodically discharged through the drain pipe 8 at the bottom of the treatment cylinder 4. The waste gas after dust removal flows upward through the buffer component 7, and after being buffered and decelerated in stages, it forms a uniform and stable upward airflow. Then, it is sent into the lower part of the spray cylinder 10 of the spray treatment mechanism 2 through the first conveying pipe 9. The waste gas flows from bottom to top in the spray cylinder 10. The spray component 11 circulates and draws the spray liquid from the bottom of the cylinder and sprays it out, making full countercurrent contact with the rising waste gas. The process involves washing and removing soluble harmful components and fine dust from the exhaust gas. The washed wet exhaust gas continues to flow upward through the liquid removal component 12 to remove droplets and mist carried in the airflow, preventing liquid from entering the subsequent adsorption unit. The exhaust gas after spraying and liquid removal is sent to the bottom of the adsorption cylinder 14 of the adsorption mechanism 3 through the second conveying pipe 13. It is then adsorbed step by step by the multi-layer activated carbon packing in the multi-stage adsorption component 15 to deeply remove organic pollutants and odor components from the exhaust gas. The purified gas is then transported outward through the exhaust pipe 16. Before being discharged, the emission indicators are monitored in real time by the detection and return component 17. If the test fails to meet the standards, the gas is sent back to the spray cylinder 10 through the return pipeline for secondary circulation treatment. Once the test meets the standards, the gas is discharged normally.
[0020] Example 2, as Figure 2 and Figure 3 As shown, this embodiment adds the following structure based on embodiment 1: the dust removal component 6 includes a guide tube 18 installed inside the lower side of the pretreatment cylinder 4, the output end of the air inlet 5 is located inside the guide tube 18, a guide pipe 19 is installed at the top center of the guide tube 18, and the top output end of the guide pipe 19 is located below the buffer component 7.
[0021] In this embodiment, after the exhaust gas enters the pretreatment cylinder 4 through the tangentially arranged air inlet 5, it is directly introduced into the internal space of the guide cylinder 18. Under the constraint of the side wall of the guide cylinder 18, the airflow makes a high-speed circular swirling motion along the inner wall of the cylinder. Dust and solid impurities with a density greater than that of the gas in the exhaust gas are thrown to the inner wall of the guide cylinder 18 under the action of centrifugal force and slide down to the bottom of the pretreatment cylinder 4. The clean airflow with large particulate impurities removed forms an upward swirling flow in the central area of the cylinder and is discharged upward through the guide pipe 19 set at the top center of the guide cylinder 18 and enters the area below the buffer assembly 7.
[0022] Example 3, as Figure 2 and Figure 3 As shown, this embodiment adds the following structure to the embodiment 1: the buffer assembly 7 includes several buffer plates 20 arranged horizontally from bottom to top, and several buffer through holes 21 are provided on the buffer plates 20. The buffer through holes 21 between two adjacent buffer plates 20 are staggered.
[0023] In this embodiment, the rising airflow output through the guide pipe 19 first contacts the lowest buffer plate 20. The airflow can only flow upward through the buffer through holes 21 opened on the buffer plate 20. Some of the airflow decelerates and changes direction after hitting the surface of the buffer plate 20. Since the buffer through holes 21 of the two adjacent buffer plates 20 are staggered, the airflow will directly hit the solid surface of the upper buffer plate 20 after passing through the lower buffer through hole 21, decelerates again and changes direction. After the gradual blocking and reversal of multiple buffer plates 20, the airflow velocity gradually decreases and the overall flow field tends to be uniform.
[0024] Example 4, as Figure 2 and Figure 3 As shown, this embodiment adds the following structure based on embodiment 1: a manifold 22 is installed on the top inner side of the pretreatment cylinder 4, the output end of the manifold 22 is connected to the input end of the first conveying pipe 9, and a first one-way valve 23 is installed on the output end of the first conveying pipe 9.
[0025] In this embodiment, the airflow, after being homogenized and decelerated by the buffer component 7, rises to the top of the pretreatment cylinder 4. Guided by the arc-shaped inner wall of the manifold 22, the dispersed airflow converges towards the central area and smoothly flows into the input end of the first conveying pipe 9. The first one-way valve 23 at the output end of the first conveying pipe 9 controls the direction of airflow, allowing only the exhaust gas to flow unidirectionally from the pretreatment cylinder 4 to the spray cylinder 10, thus blocking the backflow of pressurized gas or spray liquid in the spray cylinder 10 into the interior of the pretreatment cylinder 4.
[0026] Example 5, as Figure 2 and Figure 4 As shown, this embodiment adds the following structure based on embodiment 1: the spray assembly 11 includes an annular spray pipe 24 installed inside the spray cylinder 10. An airflow channel 25 is provided on the inner side of the annular spray pipe 24. Several evenly arranged spray heads 26 are installed around the inner side of the airflow channel 25 of the annular spray pipe 24. The input end of the annular spray pipe 24 is connected to a transfer pipe 27. The outer side of the transfer pipe 27 penetrates the spray cylinder 10 and extends to its outer side. A delivery pump 28 is installed at the input end of the transfer pipe 27. An assembly plate 29 is installed at the bottom of the delivery pump 28. The assembly plate 29 is installed on the outer side of the spray cylinder 10. A suction pipe 30 is connected to the input end of the delivery pump 28. The input end of the suction pipe 30 is located at the inner bottom of the spray cylinder 10. A sealing seat 31 is installed at the connection of the suction pipe 30 in the spray cylinder 10.
[0027] In this embodiment, the delivery pump 28 draws the spray liquid stored at the bottom of the spray cylinder 10 through the suction pipe 30, pressurizes the spray liquid through the transfer pipe 27 and sends it into the annular cavity of the annular spray pipe 24. The high-pressure spray liquid is sprayed into the central airflow channel 25 through the spray heads 26 evenly arranged around the inner circumference of the annular spray pipe 24. When the exhaust gas rising from below passes through the airflow channel 25, it comes into full countercurrent contact with the spray liquid. The soluble pollutants and fine dust in the exhaust gas are captured and absorbed by the spray liquid, and the spray liquid carrying impurities falls to the bottom of the cylinder under the action of gravity.
[0028] Example 6, as Figure 2 and Figure 4 As shown, this embodiment adds the following structure based on embodiment 1: an annular mounting base 32 is installed on the lower side of the inside of the spray cylinder 10, a filter screen frame 33 is installed on the annular mounting base 32, the input end of the suction pipe 30 is set at the bottom of the filter screen frame 33, and a horn-shaped guide seat 34 with a larger top and a smaller bottom is installed on the top of the filter screen frame 33.
[0029] In this embodiment, the spray liquid carrying impurities falls smoothly into the filter frame 33 below through the trumpet-shaped guide seat 34. The filter frame 33 intercepts and filters solid impurities and dust particles in the spray liquid. The filtered spray liquid passes through the filter frame 33 and enters the liquid storage area at the bottom of the spray cylinder 10. The suction pipe 30 draws the spray liquid from the clean liquid storage area at the bottom of the filter frame 33.
[0030] Example 7, as Figure 2 and Figure 4 As shown, this embodiment adds the following structure based on embodiment 1: the liquid removal assembly 12 includes several baffles 35 that are alternately arranged on the upper side of the annular spray pipe 24, a liquid removal channel 36 is provided between two adjacent baffles 35, and a wire mesh demister 37 is provided on the top of the uppermost baffle 35. Both the baffles 35 and the wire mesh demister 37 are installed on the upper side inside the spray cylinder 10.
[0031] In this embodiment, the wet exhaust gas after spray washing flows upward and first enters the liquid removal channel 36 between the alternately arranged baffles 35. The airflow continuously changes its flow direction under the obstruction of the baffles 35. Large-diameter liquid droplets carried in the airflow collide with the surface of the baffles 35 due to inertia, gather into large droplets, and then fall back along the surface of the baffles. The airflow that has removed the large droplets continues to flow upward through the wire mesh demister 37. The fine mist in the airflow collides and agglomerates in the gaps of the wire mesh, forming droplets, and then falls along the wire mesh structure to achieve deep liquid removal.
[0032] Example 8, as Figure 2 and Figure 5As shown, this embodiment adds the following structure based on embodiment 1: the multi-stage adsorption assembly 15 includes a gas distributor 38 installed at the bottom of the adsorption cylinder 14. The input end of the gas distributor 38 is connected to the output end of the second conveying pipe 13. Inside the adsorption cylinder 14, several uniformly arranged mesh carrier plates 39 are installed at the top output end of the gas distributor 38. Between two adjacent mesh carrier plates 39, coal-based columnar activated carbon 40, honeycomb activated carbon 41, and coconut shell granular activated carbon 42 are installed. The coal-based columnar activated carbon 40, honeycomb activated carbon 41, and coconut shell granular activated carbon 42 are arranged sequentially from bottom to top.
[0033] In this embodiment, the waste gas to be adsorbed is sent into the gas distributor 38 through the second conveying pipe 13. The gas distributor 38 evenly disperses the concentrated intake gas to avoid airflow deviation. Then, the airflow passes through each layer of mesh carrier plate 39 from bottom to top. It first contacts the bottom layer of coal-based columnar activated carbon 40 to adsorb and remove large molecular organic pollutants and some odors. Then it passes through the middle layer of honeycomb activated carbon 41, which uses its high specific surface area to further adsorb small and medium molecular pollutants. Finally, it flows through the top layer of coconut shell granular carbon 42 to deeply adsorb residual trace harmful components and odors, thus achieving step-by-step deep purification.
[0034] Example 9, as Figure 2 and Figure 5 As shown, this embodiment adds the following structure based on embodiment 1: the detection reflux assembly 17 is installed on the online detector 43 at the input end of the air outlet pipe 16, the air outlet pipe 16 is equipped with a reflux pipe 44 at the output end of the online detector 43, the output end of the reflux pipe 44 is installed on the spray cylinder 10 and located above the output end of the first conveying pipe 9, the output end of the reflux pipe 44 is equipped with a second one-way valve 45, and the output end of the air outlet pipe 16 is equipped with a switch valve 46.
[0035] In this embodiment, the gas purified by adsorption enters the outlet pipe 16 and first passes through the online detector 43 to detect the concentration of pollutants and emission indicators in the exhaust gas in real time. If the detection result meets the standard, the switch valve 46 is opened and the purified gas is directly discharged to the outside through the outlet pipe 16. If the detection result does not meet the standard, the switch valve 46 is closed and the unqualified gas is transported back to the spray cylinder 10 through the return pipe 44. The second one-way valve 45 ensures that the return gas enters the spray cylinder in one direction and will not flow back. After the return gas is mixed with the newly entered pretreated exhaust gas, it is sprayed and adsorbed again for the entire process until the emission meets the standard.
[0036] Example 10, as Figure 2 As shown, this embodiment adds the following structure to the embodiment 1: a support bracket 47 is installed on the top of the spray cylinder 10 and the adsorption cylinder 14, and the top of the support bracket 47 is installed on the bottom of the return pipe 44.
[0037] In this embodiment, the bottom of the support bracket 47 is fixedly installed on the top of the spray cylinder 10 and the adsorption cylinder 14. The top of the bracket supports the tube body of the return pipe 44, transferring the weight of the return pipe 44 and the airflow vibration load to the top structure of the two cylinders, thus forming a stable support for the suspended return pipe 44.
[0038] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.
Claims
1. A natural gas production waste gas treatment device based on high-efficiency activated carbon, characterized in that: It includes a pretreatment mechanism (1), a spray treatment mechanism (2) and an adsorption mechanism (3) connected sequentially along the airflow direction. The pretreatment mechanism (1) includes a pretreatment cylinder (4), an air inlet (5) is installed on the lower side of the exterior of the pretreatment cylinder (4), the air inlet (5) is arranged along the tangential direction of the pretreatment cylinder (4), a dust removal component (6) and a buffer component (7) are arranged sequentially from bottom to top inside the pretreatment cylinder (4), a sewage pipe (8) is installed at the bottom of the pretreatment cylinder (4), a first conveying pipe (9) is installed at the top of the pretreatment cylinder (4), and the output end of the first conveying pipe (9) is connected to the input end of the spray treatment mechanism (2); The spray treatment mechanism (2) includes a spray cylinder (10), a spray assembly (11) is installed on the lower side of the inside of the spray cylinder (10), a liquid removal assembly (12) is installed on the upper side of the inside of the spray cylinder (10), and a second conveying pipe (13) is installed on the top side of the liquid removal assembly (12) of the spray cylinder (10). The output end of the second conveying pipe (13) is connected to the input end of the multi-stage adsorption mechanism (3). The adsorption mechanism (3) includes an adsorption cylinder (14), in which a multi-stage adsorption assembly (15) is installed. An air outlet pipe (16) is installed on one side of the top of the multi-stage adsorption assembly (15) in the adsorption cylinder (14). A detection reflux assembly (17) is installed in the air outlet pipe (16). The output end of the detection reflux assembly (17) is installed on the spray cylinder (10).
2. The natural gas production waste gas treatment device based on high-efficiency activated carbon according to claim 1, characterized in that: The dust removal assembly (6) includes a guide tube (18) installed inside the lower side of the pretreatment cylinder (4), the output end of the air inlet (5) is located inside the guide tube (18), a guide pipe (19) is installed at the top center of the guide tube (18), and the top output end of the guide pipe (19) is located below the buffer assembly (7).
3. The natural gas production waste gas treatment device based on high-efficiency activated carbon according to claim 2, characterized in that: The buffer assembly (7) includes several buffer plates (20) arranged horizontally from bottom to top. The buffer plates (20) are provided with several buffer through holes (21), and the buffer through holes (21) between two adjacent buffer plates (20) are staggered.
4. The natural gas production waste gas treatment device based on high-efficiency activated carbon according to claim 3, characterized in that: The top inner side of the pretreatment cylinder (4) is equipped with a manifold (22), the output end of the manifold (22) is connected to the input end of the first conveying pipe (9), and the output end of the first conveying pipe (9) is equipped with a first one-way valve (23).
5. A natural gas production waste gas treatment device based on high-efficiency activated carbon according to claim 4, characterized in that: The spray assembly (11) includes an annular spray pipe (24) installed inside the spray cylinder (10). An airflow channel (25) is provided on the inner side of the annular spray pipe (24). Several evenly arranged spray heads (26) are installed around the inner circumference of the airflow channel (25) of the annular spray pipe (24). An adapter pipe (27) is connected to the input end of the annular spray pipe (24). The outer side of the adapter pipe (27) penetrates the spray cylinder (10) and extends to its outer side. A delivery pump (28) is installed at the input end of the transfer pipe (27). An assembly plate (29) is installed at the bottom of the delivery pump (28). The assembly plate (29) is installed on the outside of the spray cylinder (10). A suction pipe (30) is connected to the input end of the delivery pump (28). The input end of the suction pipe (30) is located at the bottom of the inner side of the spray cylinder (10). A sealing seat (31) is installed at the connection of the suction pipe (30) in the spray cylinder (10).
6. The natural gas production waste gas treatment device based on high-efficiency activated carbon according to claim 5, characterized in that: An annular mounting seat (32) is installed on the lower side of the inside of the spray cylinder (10). A filter screen frame (33) is installed on the annular mounting seat (32). The input end of the suction pipe (30) is located at the bottom of the filter screen frame (33). A horn-shaped guide seat (34) with a larger top and a smaller bottom is installed on the top of the filter screen frame (33).
7. The natural gas production waste gas treatment device based on high-efficiency activated carbon according to claim 6, characterized in that: The liquid removal assembly (12) includes several baffles (35) alternately arranged on the upper side of the annular spray pipe (24), a liquid removal channel (36) is provided between two adjacent baffles (35), and a wire mesh demister (37) is provided on the top of the uppermost baffle (35). Both the baffles (35) and the wire mesh demister (37) are installed on the upper side inside the spray cylinder (10).
8. A natural gas production waste gas treatment device based on high-efficiency activated carbon according to claim 7, characterized in that: The multi-stage adsorption assembly (15) includes a gas distributor (38) installed at the bottom of the adsorption cylinder (14). The input end of the gas distributor (38) is connected to the output end of the second delivery pipe (13). Inside the adsorption cylinder (14), a number of uniformly arranged mesh carrier plates (39) are installed at the top output end of the gas distributor (38). Between two adjacent mesh carrier plates (39), coal-based columnar activated carbon (40), honeycomb activated carbon (41), and coconut shell granular activated carbon (42) are installed. The coal-based columnar activated carbon (40), honeycomb activated carbon (41), and coconut shell granular activated carbon (42) are arranged sequentially from bottom to top.
9. A natural gas production waste gas treatment device based on high-efficiency activated carbon according to claim 8, characterized in that: The detection reflux assembly (17) is installed on the online detector (43) at the input end of the air outlet pipe (16). The air outlet pipe (16) is equipped with a reflux pipe (44) at the output end of the online detector (43). The output end of the reflux pipe (44) is installed on the spray cylinder (10) and located above the output end of the first conveying pipe (9). The output end of the reflux pipe (44) is equipped with a second one-way valve (45), and the output end of the air outlet pipe (16) is equipped with a switch valve (46).
10. A natural gas production waste gas treatment device based on high-efficiency activated carbon according to claim 9, characterized in that: The top of the spray cylinder (10) and the adsorption cylinder (14) are equipped with a support bracket (47), and the top of the support bracket (47) is installed at the bottom of the return pipe (44).