Regenerated nitrogen treatment device

Abstract

The utility model discloses a regenerated nitrogen treatment device and aims to solve the problems that in the prior art, regenerated nitrogen is directly discharged into a flare gas recovery system, the load of the flare gas recovery system is high, the nitrogen content of gas is high, and the recovery energy consumption is high. According to the technical scheme, the device comprises a nitrogen inlet cabinet, a pretreatment adsorption tank and an air pipeline, a gas outlet of the nitrogen inlet cabinet is communicated with a gas inlet of the pretreatment adsorption tank through a first pipeline, and a gas outlet of the pretreatment adsorption tank is communicated with a gas inlet of a reactor through a second pipeline. A gas outlet of the reactor is communicated with a gas inlet of the cooling device through a third pipeline; a gas outlet of the cooling device is communicated with the chimney through a fourth pipeline; the air pipeline is communicated with the second pipeline. Impurities in the regenerated nitrogen can be effectively treated, so that the regenerated nitrogen reaches the standard of being directly discharged into the atmosphere, and the energy consumption of a flare gas recovery compressor and the nitrogen content of a gas pipe network are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gas recovery, and more specifically, it relates to a device for treating regenerated nitrogen gas. Background Art

[0002] Most of the refinery flare gas recovery systems adopt the combination mode of gas holder - compressor for recovery. The low - pressure gas from each device enters the gas holder for storage through the pipeline network to the main line first, and then is sent to the high - pressure gas network as fuel gas after being pressurized by the compressor to complete the recovery.

[0003] During the production process of the refinery, a large amount of regenerated nitrogen gas will be generated. Since a large amount of regenerated nitrogen gas cannot be directly discharged into the atmosphere, and directly discharging the regenerated nitrogen gas into the flare recovery system will cause problems such as high load of the flare gas recovery system, high nitrogen content in the gas, high recovery energy consumption, and poor combustion quality. Summary of the Utility Model

[0004] The utility model overcomes the problems in the prior art that the regenerated nitrogen gas is directly discharged into the flare gas recovery system, resulting in a high load of the flare gas recovery system, and then problems such as high nitrogen content in the gas, high recovery energy consumption, and poor combustion quality. The utility model provides a device for treating regenerated nitrogen gas, which can directly treat the regenerated nitrogen gas to make the regenerated nitrogen gas meet the emission standards, avoid a large amount of nitrogen gas from entering the flare recovery system, and thus reduce the energy consumption of the flare recovery system.

[0005] To solve the above - mentioned technical problems, the utility model adopts the following technical scheme: A device for treating regenerated nitrogen gas, comprising: a nitrogen gas inlet gas holder, a pretreatment adsorption tank, and an air pipeline. The outlet of the nitrogen gas inlet gas holder is communicated with the inlet of the pretreatment adsorption tank through a first pipeline. The outlet of the pretreatment adsorption tank is communicated with the inlet of the reactor through a second pipeline. The outlet of the reactor is communicated with the inlet of the cooling device through a third pipeline. The outlet of the cooling device is communicated with the chimney through a fourth pipeline. The air pipeline is communicated with the second pipeline.

[0006] The nitrogen inlet cabinet in this utility model can cache the regenerated nitrogen. Then, the regenerated nitrogen cached in the nitrogen inlet cabinet enters the pretreatment adsorption tank through the first pipeline. The pretreatment adsorption tank can remove impurities in the regenerated nitrogen. Compressed air can be transported in the air pipeline. The regenerated nitrogen coming out of the pretreatment adsorption tank and the compressed air enter the reactor together for catalytic reaction. The reactor can heat up the regenerated nitrogen, so as to catalytically combust combustible gases such as hydrocarbons, carbon monoxide, and hydrogen in the regenerated nitrogen in the reactor. The regenerated nitrogen coming out of the reactor can be discharged into the atmosphere after passing through the cooling device. Through the above reaction process, the impurities in the regenerated nitrogen can be effectively treated, so that the regenerated nitrogen meets the standard of being directly discharged into the atmosphere, thereby reducing the amount of regenerated nitrogen entering the flare gas recovery system, and further reducing the energy consumption of the flare gas recovery compressor and the nitrogen content in the gas pipeline network.

[0007] Preferably, a fan is arranged on the first pipeline. The fan sends the regenerated nitrogen in the nitrogen inlet cabinet into the pretreatment adsorption tank.

[0008] Setting the fan can control the flow rate of the nitrogen inlet cabinet entering the pretreatment adsorption tank, and realize controlling the outflow rate of the regenerated nitrogen in the nitrogen inlet cabinet.

[0009] Preferably, the reactor includes two serially connected first reactors and second reactors. A first bed layer power supply and a second bed layer power supply are respectively arranged in the first reactor and the second reactor. By setting two serially connected first reactors and second reactors, the regenerated gas can first react in the first reactor and then react in the second reactor, prolonging the reaction time of the regenerated nitrogen in the reactor, thereby improving the catalytic efficiency of the regenerated nitrogen. In addition, the reaction temperatures in the first reactor and the second reactor are respectively controlled by the first bed layer power supply and the second bed layer power supply, so that the optimal reaction temperature of nitrogen can be matched, and the first reactor and the second reactor can set the temperature according to the actual combustible gas content in the regenerated nitrogen. The temperatures in the first reactor and the second reactor are respectively controlled.

[0010] Preferably, it further includes a regenerated gas heat exchanger. Both the second pipeline and the third pipeline pass through the regenerated gas heat exchanger, so that the regenerated nitrogen that has not entered the reactor and the regenerated nitrogen after the reaction in the reactor are heat-exchanged.

[0011] The regenerative nitrogen in the second pipeline is the regenerative nitrogen that has not entered the reactor, so its temperature is relatively low. The regenerative nitrogen in the third pipeline has just come out of the reactor and has a relatively high temperature. Therefore, the regenerative nitrogen in the second and third pipelines is heat-exchanged in the regenerative gas heat exchanger, so that the heat of the regenerative nitrogen in the third pipeline can be utilized, and then the temperature of the regenerative nitrogen in the second pipeline is increased. This enables the regenerative nitrogen in the second pipeline to be heated up before entering the reactor, thereby reducing the energy consumption in the reactor. It also enables the regenerative nitrogen in the second pipeline to undergo catalytic combustion reaction after being heated in a short time once it enters the reactor, and improves the catalytic combustion efficiency of the regenerative nitrogen.

[0012] Preferably, an auxiliary pipeline is provided in parallel with the third pipeline, and the auxiliary pipeline bypasses the regenerative gas heat exchanger.

[0013] The auxiliary pipeline and the third pipeline are in parallel, so that a part of the regenerative nitrogen coming out of the reactor enters the regenerative gas heat exchanger through the third pipeline for heat exchange, while another part of the regenerative nitrogen coming out of the reactor bypasses the regenerative gas heat exchanger through the auxiliary pipeline and enters the cooling device.

[0014] Preferably, the cooling device is a hot water extractor, and hot water passes through the hot water extractor to cool the regenerative nitrogen.

[0015] The hot water extractor enables the regenerative nitrogen and the extracted hot water to conduct heat exchange, so that the regenerative nitrogen is cooled, and the cooled regenerative nitrogen is then discharged from the chimney.

[0016] Preferably, the pretreatment adsorption tank includes a tank body. An inlet to the tank is provided at the bottom of the side wall of the tank body, and an outlet from the tank is provided at the top of the side wall of the tank body; an air distributor, a perforated plate and an activated carbon adsorption cylinder are sequentially arranged in the tank body from bottom to top along the axis.

[0017] The inlet to the tank is connected to the first pipeline. After the regenerative nitrogen enters the tank body from the inlet to the tank, it first passes through the air distributor. When the regenerative nitrogen passes through the air distributor, it can be evenly distributed in the tank body, and then passes through the perforated plate and enters the activated carbon adsorption cylinder. The activated carbon can adsorb and remove impurities in the regenerative nitrogen, and then the regenerative nitrogen is discharged from the outlet from the tank, and the outlet from the tank is connected to the second pipeline.

[0018] Preferably, a top cover that is hermetically fitted with the tank body is provided at the top of the tank body, and a support ring is provided in the circumferential direction at the bottom of the inner side wall of the tank body. The activated carbon adsorption cylinder is detachably arranged on the support ring.

[0019] After being used for a period of time, the activated carbon adsorption cylinder can be replaced by removing the top cover, which has the advantage of convenient replacement of the activated carbon adsorption cylinder.

[0020] Compared with the prior art, the beneficial effects of the present utility model are as follows: The nitrogen inlet cabinet in the present utility model can cache the regenerated nitrogen. Then, the regenerated nitrogen cached in the nitrogen inlet cabinet enters the pretreatment adsorption tank through the first pipeline. The pretreatment adsorption tank can remove impurities in the regenerated nitrogen. Compressed air can be transported in the air pipeline. The regenerated nitrogen coming out of the pretreatment adsorption tank and the compressed air enter the reactor together for catalytic reaction. The reactor can heat up the regenerated nitrogen, so as to catalytically combust combustible gases such as hydrocarbons, carbon monoxide, and hydrogen in the regenerated nitrogen in the reactor. The regenerated nitrogen coming out of the reactor can be discharged into the atmosphere after passing through the cooling device. Through the above reaction process, the impurities in the regenerated nitrogen can be effectively treated, so that the regenerated nitrogen meets the standard of being directly discharged into the atmosphere, thereby reducing the amount of regenerated nitrogen entering the flare gas recovery system, and further reducing the energy consumption of the flare gas recovery compressor and the nitrogen content in the gas pipeline network. Brief Description of the Drawings

[0021] Figure 1 is a schematic diagram of the reaction process flow of the present utility model.

[0022] Figure 2 is the internal structure diagram of the pretreatment adsorption tank of the present utility model.

[0023] In the figure: 1. Nitrogen inlet cabinet, 2. Pretreatment adsorption tank, 21. Tank body, 22. Inlet to the tank, 23. Outlet from the tank, 24. Air distributor, 25. Perforated plate, 26. Activated carbon adsorption cylinder, 27. Upper cover, 28. Support ring, 29. Limit snap ring, 3. Air pipeline, 4. Reactor, 41. First reactor, 42. Second reactor, 43. Power supply for the first bed layer, 44. Power supply for the second bed layer, 5. Cooling device, 6. Chimney, 7. Fan, 8. Regenerated gas heat exchanger, 9. Auxiliary pipeline, 10. First pipeline, 11. Second pipeline, 12. Third pipeline, 13. Fourth pipeline. Detailed Embodiments

[0024] The technical solutions of the present utility model will be further specifically described below through specific embodiments in conjunction with the drawings:

[0025] Embodiment 1: Refer to Figure 1 As shown, a regenerated nitrogen treatment device includes: a nitrogen inlet cabinet 1, a pretreatment adsorption tank 2, and an air pipeline 3. The air outlet of the nitrogen inlet cabinet 1 and the air inlet of the pretreatment adsorption tank 2 are connected through a first pipeline 10. The air outlet of the pretreatment adsorption tank 2 is connected to the air inlet of the reactor 4 through a second pipeline 11. The air outlet of the reactor 4 is connected to the air inlet of the cooling device 5 through a third pipeline 12. The air outlet of the cooling device 5 is connected to the chimney 6 through a fourth pipeline 13. The air pipeline 3 is connected to the second pipeline 11.

[0026] In this application, the nitrogen inlet cabinet 1 can cache the regenerated nitrogen. Then, the regenerated nitrogen cached in the nitrogen inlet cabinet 1 enters the pretreatment adsorption tank 2 through the first pipeline 10, and the pretreatment adsorption tank 2 can remove impurities in the regenerated nitrogen. Compressed air can be transported in the air pipeline 3. The regenerated nitrogen coming out of the pretreatment adsorption tank 2 and the compressed air enter the reactor 4 together for catalytic reaction. The reactor 4 can heat up the regenerated nitrogen, so as to catalytically combust combustible gases such as hydrocarbons, carbon monoxide, and hydrogen in the regenerated nitrogen in the reactor 4. The regenerated nitrogen coming out of the reactor 4 can be discharged into the atmosphere after passing through the cooling device 5.

[0027] In this embodiment, through the above reaction process, the impurities in the regenerated nitrogen can be effectively treated, so that the regenerated nitrogen meets the standard of being directly discharged into the atmosphere, thereby reducing the amount of regenerated nitrogen entering the flare gas recovery system, and further reducing the energy consumption of the flare gas recovery compressor and the nitrogen content in the gas pipeline network.

[0028] Specifically, in the past, after 4000 Nm³ / h of regenerated nitrogen entered the flare gas regeneration system, the nitrogen content in the 30000 Nm³ / h flare gas regeneration system increased by 11.76%. The load of the flare gas recovery compressor increased, and the calorific value of the fuel gas decreased. A total of about 4000 * 72 = 288000 Nm³ of nitrogen needed to be discharged, all entering the flare gas regeneration system. After implementing the above technical solution, 268000 Nm³ of regenerated nitrogen can be treated, and the amount of regenerated nitrogen entering the flare gas recovery system is reduced by 93%.

[0029] Example 2: Refer to Figure 1 As shown, a regenerated nitrogen treatment device includes: a nitrogen inlet cabinet 1, a pretreatment adsorption tank 2, and an air pipeline 3. The air outlet of the nitrogen inlet cabinet 1 and the air inlet of the pretreatment adsorption tank 2 are connected through a first pipeline 10. The air outlet of the pretreatment adsorption tank 2 is connected to the air inlet of the reactor 4 through a second pipeline 11, and a catalyst is arranged in the reactor 4. The air outlet of the reactor 4 is connected to the air inlet of the cooling device 5 through a third pipeline 12. The air outlet of the cooling device 5 is connected to the chimney 6 through a fourth pipeline 13. The air pipeline 3 is connected to the second pipeline 11.

[0030] The nitrogen inlet cabinet 1 can cache the regenerated nitrogen. After that, the regenerated nitrogen cached in the nitrogen inlet cabinet 1 enters the pretreatment adsorption tank 2 through the first pipeline 10. The pretreatment adsorption tank 2 can remove impurities in the regenerated nitrogen. Compressed air can be transported in the air pipeline 3. The regenerated nitrogen coming out of the pretreatment adsorption tank 2 and the compressed air enter the reactor 4 together for catalytic reaction. The reactor 4 can heat up the regenerated nitrogen, so as to catalytically combust combustible gases such as hydrocarbons, carbon monoxide, and hydrogen in the regenerated nitrogen in the reactor 4. The regenerated nitrogen coming out of the reactor 4 can be discharged into the atmosphere after passing through the cooling device 5.

[0031] A blower 7 is arranged on the first pipeline 10. The blower 7 sends the regenerated nitrogen in the nitrogen inlet cabinet 1 into the pretreatment adsorption tank 2. Arranging the blower 7 can control the flow rate of the regenerated nitrogen entering the pretreatment adsorption tank 2 from the nitrogen inlet cabinet 1, and realize controlling the outflow rate of the regenerated nitrogen in the nitrogen inlet cabinet 1.

[0032] In one embodiment, the reactor 4 includes two serially connected first reactors 41 and second reactors 42. A first bed power supply 43 and a second bed power supply 44 are respectively arranged in the first reactors 41 and the second reactors 42. The first bed power supply 43 and the second bed power supply 44 respectively control the temperatures in the first reactors 41 and the second reactors 42.

[0033] By arranging two serially connected first reactors 41 and second reactors 42, the regenerated gas can first react in the first reactor 41 and then react in the second reactor 42, prolonging the reaction time of the regenerated nitrogen in the reactor 4, thereby improving the catalytic efficiency of the regenerated nitrogen. In addition, by using the first bed power supply 43 and the second bed power supply 44 to respectively control the reaction temperatures in the first reactor 41 and the second reactor, it is possible to match the optimal reaction temperature of the nitrogen, so that the first reactor 41 and the second reactor 42 can set the temperature according to the actual combustible gas content in the regenerated nitrogen. For example, when the regenerated nitrogen initially enters the first reactor 41, its combustible gas content is relatively high. Therefore, a higher temperature can be set in the first reactor 41 to improve the catalytic combustion efficiency. And in the second reactor 42, since the combustible gas content in the regenerated nitrogen is already relatively low, the temperature in the second reactor 42 can be set relatively low, achieving both the complete catalytic combustion of the combustible gas in the regenerated nitrogen and energy saving.

[0034] In one embodiment, a regenerated gas heat exchanger 8 is further included. The second pipeline 11 and the third pipeline 12 both pass through the regenerated gas heat exchanger 8, so that the regenerated nitrogen that has not entered the reactor 4 and the regenerated nitrogen after the reaction in the reactor 4 are heat-exchanged.

[0035] The regeneration nitrogen gas in the second pipeline 11 is the regeneration nitrogen gas that has not entered the reactor 4, so its temperature is relatively low. The regeneration nitrogen gas in the third pipeline 12 has just come out of the reactor 4 and has a relatively high temperature. Therefore, the regeneration nitrogen gas in the second pipeline 11 and the third pipeline 12 is heat-exchanged in the regenerated gas heat exchanger 8, so that the heat of the regeneration nitrogen gas in the third pipeline 12 can be utilized, and then the temperature of the regeneration nitrogen gas in the second pipeline 11 is increased. This enables the regeneration nitrogen gas in the second pipeline 11 to be heated up before entering the reactor 4, thereby reducing the energy consumption in the reactor 4. It also enables the regeneration nitrogen gas in the second pipeline 11 to undergo catalytic combustion reaction after being heated in a short time once it enters the reactor 4, and also improves the catalytic combustion efficiency of the regeneration nitrogen gas.

[0036] In addition, an auxiliary pipeline 9 is provided in parallel with the third pipeline 12, and the auxiliary pipeline 9 bypasses the regenerated gas heat exchanger 8. The auxiliary pipeline 9 and the third pipeline 12 are in parallel, so that a part of the regeneration nitrogen gas coming out of the reactor 4 enters the regenerated gas heat exchanger 8 through the third pipeline 12 for heat exchange, while another part of the regeneration nitrogen gas coming out of the reactor 4 bypasses the regenerated gas heat exchanger 8 through the auxiliary pipeline 9 and enters the cooling device 5.

[0037] The cooling device 5 is a hot water extractor, and hot water is taken through the hot water extractor to cool the regeneration nitrogen gas. The hot water extractor enables the regeneration nitrogen gas and the taken hot water to conduct heat exchange, so that the regeneration nitrogen gas is cooled, and the cooled regeneration nitrogen gas is then discharged from the chimney 6.

[0038] The working principle of this embodiment is as follows: The nitrogen gas inlet cabinet 1 caches the regeneration nitrogen gas. Then, the regeneration nitrogen gas cached in the nitrogen gas inlet cabinet 1 enters the pretreatment adsorption tank 2 along the first pipeline 10 under the action of the fan 7. The pretreatment adsorption tank 2 can remove impurities in the regeneration nitrogen gas; Compressed air can be transported in the air pipeline 3. The regeneration nitrogen gas coming out of the pretreatment adsorption tank 2 and the compressed air enter the reactor 4 together for catalytic reaction. The first reactor 41 and the second reactor 42 can raise the temperature of the regeneration nitrogen gas, so that combustible gases such as hydrocarbons, carbon monoxide, and hydrogen in the regeneration nitrogen gas are catalytically combusted in the first reactor 41 and the second reactor 42. The regeneration nitrogen gas coming out of the first reactor 41 and the second reactor 42 enters the regenerated gas heat exchanger 8 to conduct heat exchange with the regeneration nitrogen gas in the second pipeline, and then the regeneration nitrogen gas coming out of the regenerated gas heat exchanger 8 is discharged into the atmosphere through the chimney 6 after passing through the cooling device 5.

[0039] In this embodiment, through the above reaction process, the impurities in the regeneration nitrogen gas can be effectively treated, so that the regeneration nitrogen gas meets the standard for direct discharge into the atmosphere, thereby reducing the amount of regeneration nitrogen gas entering the flare gas recovery system, and further reducing the energy consumption of the flare gas recovery compressor and the nitrogen content in the gas pipeline network.

[0040] Specifically, in the past, after 4000 Nm³ / h of regenerated nitrogen entered the flare gas regeneration system, the nitrogen content in the 30000 Nm³ / h flare gas regeneration system increased by 11.76%. The load of the flare gas recovery compressor increased, and the calorific value of the fuel gas decreased. A total of about 4000 * 72 = 288000 Nm³ of nitrogen needed to be discharged and all entered the flare gas regeneration system. After implementing the above technical solution, 268000 Nm³ of regenerated nitrogen can be treated, and the amount of regenerated nitrogen entering the flare gas recovery system is reduced by 93%.

[0041] Example 3: Refer to Figure 1 and Figure 2 As shown, this example is similar in structure to Example 1 or Example 2. The difference is that the pretreatment adsorption tank 2 includes a tank body 21. At the bottom of the side wall of the tank body 21, there is an inlet 22 into the tank, and at the top of the side wall of the tank body 21, there is an outlet 23 out of the tank; inside the tank body 21, an air distributor 24, a perforated plate 25, and an activated carbon adsorption cylinder 26 are sequentially arranged from bottom to top along the axis. The activated carbon adsorption cylinder 26 includes a cylinder shell and activated carbon arranged inside the cylinder shell. The perforated plate is distributed with a plurality of uniformly distributed and penetrating air holes.

[0042] The inlet 22 is connected to the first pipeline. After the regenerated nitrogen enters the tank body 21 from the inlet 22, it first passes through the air distributor 24. When the regenerated nitrogen passes through the air distributor 24, it can be evenly distributed inside the tank body 21, and then passes through the perforated plate and enters the activated carbon adsorption cylinder 26. The activated carbon can adsorb and remove impurities in the regenerated nitrogen, and then the regenerated nitrogen is discharged from the outlet 23. The outlet 23 is connected to the second pipeline.

[0043] At the top of the tank body 21, there is an upper cover 27 that is sealingly matched with it. The upper cover 27 and the tank body 21 are sealingly connected through a flange structure. At the circumferential direction of the bottom of the inner side wall of the tank body 21, there is a support ring 28. On the side of the support ring 28 away from the inner wall of the tank body 21, there is a limit snap ring 29. The activated carbon adsorption cylinder 26 is detachably arranged on the support ring 28. And when the activated carbon adsorption cylinder 26 is fixed on the support ring 28, the bottom of the activated carbon adsorption cylinder 26 is stuck in the annular groove formed by the limit snap ring 29 and the side wall of the tank body 21, so that the activated carbon adsorption cylinder 26 can be fixed between the limit snap ring 29 and the side wall of the tank body 21. After using for a period of time, the activated carbon adsorption cylinder 26 can be replaced by removing the upper cover 27, which has the advantage of being convenient to replace the activated carbon adsorption cylinder 26.

[0044] The above-described embodiments are only preferred solutions of the present invention and do not impose any form of limitation on the present invention. There are other variations and modifications without exceeding the technical solutions recorded in the claims.

Claims

1. A regenerated nitrogen treatment device, characterized in that, Including: A nitrogen inlet cabinet, a pretreatment adsorption tank, and an air pipeline. The outlet of the nitrogen inlet cabinet and the inlet of the pretreatment adsorption tank are connected through a first pipeline. The outlet of the pretreatment adsorption tank is connected to the inlet of the reactor through a second pipeline. The outlet of the reactor is connected to the inlet of the cooling device through a third pipeline. The outlet of the cooling device is connected to the chimney through a fourth pipeline. The air pipeline is connected to the second pipeline.

2. The regenerated nitrogen gas treatment device according to claim 1, wherein A fan is provided on the first pipeline, and the fan sends the regenerated nitrogen in the nitrogen inlet cabinet into the pretreatment adsorption tank.

3. The regenerated nitrogen treatment device according to claim 1, characterized in that, The reactor includes two serially connected first reactors and second reactors. A first bed layer power supply and a second bed layer power supply are respectively provided in the first reactor and the second reactor, and the first bed layer power supply and the second bed layer power supply respectively control the temperatures in the first reactor and the second reactor.

4. The regenerated nitrogen gas treatment device according to any one of claims 1 to 3, characterized in that, It further includes a regenerated gas heat exchanger. Both the second pipeline and the third pipeline pass through the regenerated gas heat exchanger, so that the regenerated nitrogen that has not entered the reactor and the regenerated nitrogen after the reaction in the reactor are heat-exchanged.

5. The regenerated nitrogen treatment device according to claim 4, characterized in that, An auxiliary pipeline parallel to it is provided on the third pipeline, and the auxiliary pipeline bypasses the regenerated gas heat exchanger.

6. The regenerated nitrogen gas treatment device according to any one of claims 1 to 3, characterized in that, The cooling device is a hot water heat exchanger, and hot water passes through the hot water heat exchanger to cool the regenerated nitrogen.

7. The regenerated nitrogen gas treatment device according to any one of claims 1 to 3, characterized in that, The pretreatment adsorption tank includes a tank body. An inlet to the tank is provided at the bottom of the side wall of the tank body, and an outlet from the tank is provided at the top of the side wall of the tank body. An air distributor, a perforated plate, and an activated carbon adsorption cylinder are sequentially arranged in the tank body from bottom to top along the axis.

8. The regenerated nitrogen gas treatment device according to claim 7, characterized in that, The top of the tank body is provided with an upper cover that is hermetically fitted with it. A support ring is arranged in the circumferential direction at the bottom of the inner side wall of the tank body, and the activated carbon adsorption cylinder is detachably arranged on the support ring.

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