CO2 comprehensive treatment device

Abstract

The utility model relates to a kind of CO2 comprehensive management device, including circulating fluidized bed boiler, air preheater, low pressure economizer, carbon dioxide collector, tail gas treatment and discharge system, biological base nylon raw material greenhouse, greenhouse heat exchanger for biological base nylon raw material greenhouse, drain tank, low pressure heater, oxygen remover, biological base nylon raw material processing room, biological base nylon device and byproduct processing system, air preheater flue gas import and circulating fluidized bed boiler smoke outlet intercommunication, outlet is parallel to have two conveying pipelines, one conveying pipeline tail end and low pressure economizer air inlet intercommunication, low pressure economizer gas outlet and carbon dioxide collector air inlet intercommunication, carbon dioxide collector exhaust port and another conveying pipeline tail end are all with tail gas treatment and discharge system air inlet intercommunication, carbon dioxide collector carbon dioxide discharge port and biological base nylon raw material greenhouse carbon dioxide import intercommunication.The utility model can realize the comprehensive management utilization of the heat and carbon dioxide of boiler flue gas.

Description

Technical Field

[0001] This utility model belongs to the field of boiler carbon emission technology, specifically relating to a comprehensive CO2 treatment device. Background Technology

[0002] Currently, in the production of circulating fluidized bed boilers in nylon chemical plants, the exhaust gas generally has high calorific and carbon dioxide content. The conventional approach is to first pass the flue gas into an air preheater to exchange heat and cool it down, and then pass it into a low-pressure economizer with bypass piping for further heat exchange and cooling before discharging it through a tail gas treatment and emission system. However, this method does not effectively collect, treat, and utilize the carbon dioxide in the flue gas, resulting in still high overall carbon emissions. Furthermore, the heat absorbed by the low-pressure economizer is not effectively utilized in other systems, making the overall process insufficiently energy-efficient and environmentally friendly, and requiring improvement. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a CO2 comprehensive treatment device that can comprehensively treat and utilize the heat and carbon dioxide of boiler flue gas to solve the above problems.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a comprehensive CO2 treatment device, comprising a circulating fluidized bed boiler, an air preheater, a low-pressure economizer, a carbon dioxide trap, a tail gas treatment and emission system, a bio-based nylon raw material greenhouse, a greenhouse heat exchanger for the bio-based nylon raw material greenhouse, a condensate tank, a low-pressure heater, a deaerator, a bio-based nylon raw material processing chamber, a bio-based nylon device, and a by-product treatment system. The flue gas outlet of the circulating fluidized bed boiler is connected to the flue gas inlet of the air preheater. The flue gas outlet of the air preheater is connected in parallel to two conveying pipelines. Each of the two conveying pipelines is equipped with a control valve, and the end of one conveying pipeline is connected to the air inlet of the low-pressure economizer. The air outlet of the low-pressure economizer is connected to the air inlet of the carbon dioxide trap. The exhaust port of the carbon dioxide trap and the end of the other conveying pipeline are both connected to the air inlet of the tail gas treatment and emission system. The carbon dioxide emission port of the carbon dioxide trap is connected to the carbon dioxide inlet of the bio-based nylon raw material greenhouse. The oxygen-enriched air outlet of the bio-based nylon raw material greenhouse is connected to the secondary air outlet of the circulating fluidized bed boiler. The outlet of the condensate tank is connected to the inlet of the low-pressure economizer. The outlet of the low-pressure economizer is connected to the inlet of the greenhouse heat exchanger. The outlet of the greenhouse heat exchanger is connected to the inlet of the low-pressure heater. The outlet of the low-pressure heater is connected to the inlet of the deaerator. The bio-based nylon raw material outlet of the bio-based nylon raw material greenhouse is connected to the inlet of the bio-based nylon raw material processing chamber. The product outlet of the bio-based nylon raw material processing chamber is connected to the inlet of the bio-based nylon device. The by-product outlet of the bio-based nylon raw material processing chamber is connected to the inlet of the by-product treatment system. The outlet of the by-product treatment system is connected to the fuel inlet of the circulating fluidized bed boiler.

[0005] Preferably, the carbon dioxide trap includes a housing, with the air inlet of the carbon dioxide trap located on one side of the housing and the exhaust port located on the other side of the housing. The bottom of the housing is open and abuts against a sealing plate. The sealing plate is liftable and has a detachable support plate located at its top inside the housing. Several hollow columnar carbon dioxide separation membranes are fixed on the support plate. The top of each carbon dioxide separation membrane abuts against the top of the inner housing and has a through hole on the corresponding top of the housing. A gas collection hood is fixed on the top of the outer housing. All the through holes are located inside the gas collection hood. The carbon dioxide exhaust port of the carbon dioxide trap is located at the top of the gas collection hood.

[0006] Preferably, a hydraulic cylinder is vertically fixed below the sealing plate, and the piston rod of the hydraulic cylinder faces upward and is fixedly connected to the bottom of the sealing plate.

[0007] Preferably, the support plate has a cavity, and a long strip-shaped through groove communicating with the bottom surface of the support plate is opened at the center of the bottom of the cavity. Positioning plates are fixed on the bottom of the support plate on both sides of the through groove. Positioning grooves are opened on the sealing plates corresponding to the positioning plates. A motor is built into the sealing plate corresponding to the through groove. The output shaft of the motor extends upward out of the sealing plate and is fixedly connected to a limiting plate. The support plate abuts against the sealing plate. The positioning plate is inserted into the corresponding positioning groove. The limiting plate extends into the cavity through the through groove and its bottom surface is flush with the bottom surface of the cavity. The limiting plate rotates 90 degrees and abuts against the bottom of the cavity.

[0008] Preferably, a sealing ring is fixed on the top surface of the sealing plate corresponding to the housing and on the top of each carbon dioxide separation membrane.

[0009] Preferably, a compressor is fixedly mounted on the outer side of the housing, an air pump is fixedly mounted on the top of the gas collection hood, the air inlet of the carbon dioxide trap is connected to the air outlet of the compressor, the air inlet of the compressor is connected to the air outlet of the low-pressure economizer, the carbon dioxide emission port of the carbon dioxide trap is connected to the air inlet of the air pump, and the air outlet of the air pump is connected to the carbon dioxide inlet of the bio-based nylon raw material greenhouse.

[0010] The beneficial effects of this invention are as follows: An air preheater is used to effectively exchange heat and cool the flue gas from the circulating fluidized bed boiler with the air supplied to the boiler. The flue gas is then transported to a low-pressure economizer, where it again exchanges heat and cools with water from the condensate tank. Afterward, the flue gas is sent to a carbon dioxide trap to effectively separate the carbon dioxide. The separated flue gas is then transported to a tail gas treatment and emission system for further treatment and discharge. The water that absorbs heat from the flue gas in the low-pressure economizer can be transported to a greenhouse heat exchanger, where it can effectively exchange heat with the air in the bio-based nylon raw material greenhouse, providing a heat source for the greenhouse and thus achieving full and effective utilization of the heat in the flue gas. The water, after heat exchange, is preheated by a low-pressure heater and then enters a deaerator for deoxygenation. The deoxygenated water is then supplied to the circulating fluidized bed boiler. The carbon dioxide separated by the carbon dioxide trap can be transported to the bio-based nylon raw material greenhouse, providing the necessary nutrients for various plants cultivated there as raw materials for bio-based nylon. This achieves full treatment and utilization of carbon dioxide in flue gas, reducing carbon emissions. Simultaneously, the plants in the bio-based nylon raw material greenhouse also generate oxygen-enriched air, which can be used as secondary air in the circulating fluidized bed boiler. This effectively improves the combustion efficiency of the circulating fluidized bed boiler and reduces the output of the corresponding fans, resulting in energy savings. Mature plants can be sent to the bio-based nylon raw material processing chamber for processing. The main product can be sent to the bio-based nylon unit for use, while by-products can be sent to the by-product treatment system. After solidification and granulation, the by-products are sent to the circulating fluidized bed boiler for co-firing. This allows for the recycling of various materials, reducing overall carbon emissions and achieving comprehensive carbon dioxide control, making it more environmentally friendly and practical. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the main structure of the carbon dioxide trap of this utility model;

[0013] Figure 3 This is a schematic diagram of the main structure of the carbon dioxide trap after the sealing plate has been lowered.

[0014] Figure 4 This is a schematic diagram of the main structure of the sealing plate of this utility model;

[0015] Figure 5 This is a top view of the sealing plate of this utility model;

[0016] Figure 6 This is a schematic diagram of the main structure of the support plate of this utility model;

[0017] Figure 7 This is a bottom view of the support plate of this utility model;

[0018] Figure 8 This is a schematic diagram of the main structure of the support plate of this utility model installed on the sealing plate;

[0019] Figure 9 This is a top view of the structure of the support plate of this utility model installed on the sealing plate.

[0020] The diagram is labeled as follows: 1 is a circulating fluidized bed boiler, 2 is an air preheater, 3 is a conveying pipeline, 4 is a control valve, 5 is a low-pressure economizer, 6 is a carbon dioxide trap, 7 is a tail gas treatment and emission system, 8 is a bio-based nylon raw material greenhouse, 9 is a condensate tank, 10 is a greenhouse heat exchanger, 11 is a low-pressure heater, 12 is a deaerator, 13 is a bio-based nylon raw material processing chamber, 14 is a bio-based nylon device, 15 is a by-product processing system, 16 is a shell, 17 is a sealing plate, 18 is a support plate, 19 is a carbon dioxide separation membrane, 20 is a through hole, 21 is a gas collection hood, 22 is a hydraulic cylinder, 23 is a cavity, 24 is a through groove, 25 is a positioning plate, 26 is a positioning groove, 27 is a motor, 28 is a limit plate, 29 is a sealing ring, 30 is a compressor, and 31 is an air pump. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0022] like Figures 1 to 9As shown, a comprehensive CO2 treatment device includes a circulating fluidized bed boiler 1, an air preheater 2, a low-pressure economizer 5, a carbon dioxide trap 6, a tail gas treatment and emission system 7, a bio-based nylon raw material greenhouse 8, a greenhouse heat exchanger 10 for the bio-based nylon raw material greenhouse 8, a condensate tank 9, a low-pressure heater 11, a deaerator 12, a bio-based nylon raw material processing chamber 13, a bio-based nylon device 14, and a by-product treatment system 15. The flue gas outlet of the circulating fluidized bed boiler 1 is connected to the flue gas inlet of the air preheater 2. The flue gas outlet of the air preheater 2 is connected in parallel to two conveying pipelines 3. Each of the two conveying pipelines 3 is equipped with a control valve 4. The tail end of one conveying pipeline 3 is connected to the air inlet of the low-pressure economizer 5, the air outlet of the low-pressure economizer 5 is connected to the air inlet of the carbon dioxide trap 6, and the exhaust port of the carbon dioxide trap 6 and the tail end of the other conveying pipeline 3 are both connected to the air inlet of the tail gas treatment and emission system 7. The carbon dioxide emission port of the carbon dioxide trap 6 is connected to the carbon dioxide inlet of the bio-based nylon raw material greenhouse 8, and the oxygen-enriched air outlet of the bio-based nylon raw material greenhouse 8 is connected to the secondary air outlet of the circulating fluidized bed boiler 1. The outlet of the condensate tank 9 is connected to the inlet of the low-pressure economizer 5, the outlet of the low-pressure economizer 5 is connected to the inlet of the greenhouse heat exchanger 10, the outlet of the greenhouse heat exchanger 10 is connected to the inlet of the low-pressure heater 11, and the outlet of the low-pressure heater 11 is connected to the inlet of the deaerator 12. The bio-based nylon raw material outlet of the bio-based nylon raw material greenhouse 8 is connected to the feed inlet of the bio-based nylon raw material processing chamber 13, the product outlet of the bio-based nylon raw material processing chamber 13 is connected to the inlet of the bio-based nylon device 14, the by-product outlet of the bio-based nylon raw material processing chamber 13 is connected to the inlet of the by-product treatment system 15, and the outlet of the by-product treatment system 15 is connected to the fuel inlet of the circulating fluidized bed boiler 1.

[0023] An air preheater 2 can be used to effectively exchange heat and cool the flue gas from the circulating fluidized bed boiler 1 with the air supplied to the boiler 1. The flue gas is then conveyed to a low-pressure economizer 5, where it exchanges heat again with water from the condensate tank 9. Afterward, the flue gas is conveyed to a carbon dioxide trap 6 to effectively separate the carbon dioxide. The separated flue gas is then conveyed to a tail gas treatment and emission system 7 for further treatment and discharge. The water that absorbs heat from the flue gas in the low-pressure economizer 5 can be conveyed to a greenhouse heat exchanger 10, where it can effectively exchange heat with the air in the bio-based nylon raw material greenhouse 8, providing a heat source for the greenhouse and thus achieving full and effective utilization of the heat in the flue gas. The water, after heat exchange, is preheated by a low-pressure heater 11 and then enters a deaerator 12 for deoxygenation. The deoxygenated water is then supplied to the circulating fluidized bed boiler 1. The carbon dioxide separated by the carbon dioxide trap 6 can be transported to the bio-based nylon raw material greenhouse 8, providing the necessary nutrients for the various plants cultivated within the greenhouse that will be used as raw materials for bio-based nylon. This achieves full treatment and utilization of carbon dioxide in the flue gas, reducing carbon emissions. Simultaneously, the various plants in the bio-based nylon raw material greenhouse 8 can also generate oxygen-enriched air, which can be used as secondary air for the circulating fluidized bed boiler 1. This effectively improves the combustion efficiency of the circulating fluidized bed boiler 1 and reduces the output of the corresponding fans, resulting in energy savings. Mature plants can be sent to the bio-based nylon raw material processing chamber 13 for processing. The main product can be sent to the bio-based nylon device 14 for use, while by-products can be sent to the by-product treatment system 15. After solidification, granulation, and other treatments in the by-product treatment system 15, the by-products are sent to the circulating fluidized bed boiler 1 for co-firing. This allows for the recycling of various materials, reducing overall carbon emissions and achieving comprehensive carbon dioxide treatment, making it more environmentally friendly and practical.

[0024] The circulating fluidized bed boiler 1, air preheater 2, low-pressure economizer 5, exhaust gas treatment and emission system 7, bio-based nylon raw material greenhouse 8, greenhouse heat exchanger 10 for bio-based nylon raw material greenhouse 8, condensate tank 9, low-pressure heater 11, deaerator 12, bio-based nylon raw material processing chamber 13, bio-based nylon device 14, and by-product treatment system 15 can all utilize existing technologies. In the air preheater 2, the air supplied to the circulating fluidized bed boiler 1 exchanges heat with the flowing flue gas. The air preheater 2 preheats the air entering the boiler by recovering waste heat from the flue gas, reducing heat loss carried away by the exhaust gas, thereby improving the overall thermal efficiency of the boiler, improving the boiler's combustion conditions, and reducing the exhaust gas temperature. The two parallel conveying pipelines 3 allow the flue gas conveying to be switched to another conveying pipeline 4 when the low-pressure economizer 5 experiences blockage due to water quality issues, ensuring the normal operation of the circulating fluidized bed boiler 1, improving system safety, and facilitating the maintenance of the low-pressure economizer 5. The control valve 4 facilitates switching of the flue gas delivery line. Control valves 4 can also be installed on the connecting pipelines between other equipment as needed. Furthermore, booster fans and water pumps can be installed on the flue gas delivery pipeline and the water delivery pipeline (heat exchange medium) from the condensate tank 9, as needed, to ensure smooth flow of flue gas and water. The exhaust gas treatment and emission system 7 can utilize existing conventional flue gas desulfurization, denitrification, and dust removal devices, as well as chimneys, to further purify the flue gas and ultimately ensure compliant emissions. The low-pressure heater 11 preheats the water after heat exchange before sending it to the deaerator 12 for deoxygenation. The deoxygenated water is then supplied to the boiler, ensuring the quality of the water entering the boiler and improving the efficiency and safety of the entire thermal system. The by-product treatment system mainly includes equipment for coagulation and granulation of by-products, utilizing existing technology to coagulate and granulate the by-products, enabling them to be used as fuel.

[0025] In this embodiment, the carbon dioxide trap 6 includes a housing 16. The air inlet of the carbon dioxide trap 6 is located on one side of the housing 16, and the exhaust port is located on the other side of the housing 16. The bottom of the housing 16 is open and abuts against a sealing plate 17. The sealing plate 17 is adjustable and its top is detachably provided with a support plate 18 located inside the housing 16. Several hollow columnar carbon dioxide separation membranes 19 are fixed on the support plate 18. The top of the carbon dioxide separation membrane 19 abuts against the top of the inner side of the housing 16, and a through hole 20 is opened on the top of the housing 16 corresponding to its inner side. A gas collection hood 21 is fixed on the top of the outer side of the housing 20. The through holes 20 are all located inside the gas collection hood 21. The carbon dioxide emission port of the carbon dioxide trap 6 is located on the top of the gas collection hood 21.

[0026] When separating carbon dioxide from flue gas, the flue gas first enters the housing 16 through the inlet, and then flows through the area where the carbon dioxide separation membrane 19 is located. The properties of the carbon dioxide separation membrane 19 allow carbon dioxide in the flue gas to pass through and enter the inner side of the membrane, blocking other components of the flue gas from passing through, thus achieving the purpose of carbon dioxide separation. The remaining flue gas is discharged through the exhaust port after passing through the area of ​​the carbon dioxide separation membrane 19. The carbon dioxide that enters the inner side of the carbon dioxide separation membrane 19 is collected in the gas collection hood 21 through the corresponding through-holes 20, and then discharged through the corresponding carbon dioxide emission port and transported to the bio-based nylon raw material greenhouse 8. After a period of use, when the carbon dioxide separation membrane 19 is damaged, it can be lowered and removed from the housing 16 by using the lifting mechanism of the sealing plate 17 after shutdown. The entire support plate 18 can then be disassembled and replaced using the detachable mechanism between the support plate 18 and the sealing plate 17, thus achieving convenient replacement of the carbon dioxide separation membrane 19 and making the equipment more flexible and practical. The carbon dioxide separation membrane 19 can be made of existing conventional polypropylene hollow fiber microporous membranes, etc.

[0027] In this embodiment, a hydraulic cylinder 22 is vertically fixed below the sealing plate 17. The piston rod of the hydraulic cylinder 22 faces upward and is fixedly connected to the bottom of the sealing plate 17, so that the sealing plate 17 can be raised and lowered by the extension and retraction of the piston rod of the hydraulic cylinder 22, thereby realizing the overall disassembly and replacement of the carbon dioxide separation membrane 19.

[0028] In this embodiment, the support plate 18 has a cavity 23. A long, narrow groove 24 communicating with the bottom surface of the support plate 18 is formed at the center of the bottom of the cavity 23. Positioning plates 25 are fixed to the bottom of the support plate 18 on both sides of the groove 24. Positioning slots 26 are formed on the corresponding sealing plates 17 of the positioning plates 25. A motor 27 is built into the sealing plate 17 corresponding to the groove 24. The output shaft of the motor 27 extends upwards from the sealing plate 17 and is fixedly connected to a limiting plate 28. The support plate 18 abuts against the sealing plate 17, and the positioning plates 25 are inserted into the corresponding positioning slots 26. The limiting plates 28 are... The through groove 24 extends into the cavity 23 with its bottom surface flush with the bottom surface of the cavity 23. The limiting plate 28 rotates 90 degrees and abuts against the bottom of the cavity 23. This allows the support plate 18 to be disassembled by lowering the sealing plate 17 to a suitable height, then running the motor 227 to rotate the limiting plate 28 90 degrees until it aligns with the through groove 24. This releases the pressure limiting on the support plate 18. The support plate 18 is then moved upwards, allowing the limiting plate 28 to exit the cavity 23 and the positioning plate 25 to be pulled out of the positioning groove 26, thus completing the disassembly of the original support plate 18. When installing a new support plate 18, simply place the support plate 18 against the sealing plate 17, aligning the positioning plate 25 with the corresponding positioning groove 26. This achieves initial positioning and installation of the support plate 18. At this point, the limiting plate 28 can pass through the through groove 24 into the cavity 23. Then, the motor 27 is operated, driving the limiting plate 28 to rotate 90 degrees. This makes the limiting plate 28 perpendicular to the through groove 24 and press against the bottom of the cavity 23, thus pressing and fixing the support plate 18 in place, achieving further secure installation of the support plate 18. This simplifies operation, allowing for the complete replacement of the carbon dioxide separation membrane 19 through the easy disassembly and assembly of the entire support plate 18, making the overall use of the equipment more flexible and convenient. After installing the support plate 18, the piston rod of the hydraulic cylinder 22 extends, raising the sealing plate 17 into position for continued use.

[0029] In this embodiment, a sealing ring 29 is fixed on the top surface of the sealing plate 17 corresponding to the housing 16 and on the top of each carbon dioxide separation membrane 19 to ensure the sealing of the corresponding contact points and prevent air leakage.

[0030] In this embodiment, a compressor 30 is fixedly mounted on the outer side of the housing 16, and an air pump 31 is fixedly mounted on the top of the gas collection hood 21. The air inlet of the carbon dioxide trap 6 is connected to the air outlet of the compressor 30, the air inlet of the compressor 30 is connected to the air outlet of the low-pressure economizer 5, the carbon dioxide discharge port of the carbon dioxide trap 6 is connected to the air inlet of the air pump 31, and the air outlet of the air pump 31 is connected to the carbon dioxide inlet of the bio-based nylon raw material greenhouse 8. This allows the compressor 30 and the air pump 31 to work together to achieve a suitable pressure ratio between the inner and outer sides of the carbon dioxide separation membrane 19 during the membrane separation operation, providing the pressure conditions required for membrane separation and ensuring its smooth operation. Both the compressor 30 and the air pump 31 can be based on existing technologies.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A comprehensive CO2 treatment device, characterized in that, The system includes a circulating fluidized bed boiler, an air preheater, a low-pressure economizer, a carbon dioxide trap, a tail gas treatment and emission system, a bio-based nylon raw material greenhouse, a greenhouse heat exchanger for the bio-based nylon raw material greenhouse, a condensate tank, a low-pressure heater, a deaerator, a bio-based nylon raw material processing room, a bio-based nylon device, and a by-product treatment system. The flue gas outlet of the circulating fluidized bed boiler is connected to the flue gas inlet of the air preheater. The flue gas outlet of the air preheater is connected in parallel to two conveying pipelines. Each conveying pipeline is equipped with a control valve, and the end of one conveying pipeline is connected to the air inlet of the low-pressure economizer. The air outlet of the low-pressure economizer is connected to the air inlet of the carbon dioxide trap. The exhaust port of the carbon dioxide trap and the end of the other conveying pipeline are both connected to the air inlet of the tail gas treatment and emission system. The carbon dioxide emission port of the carbon dioxide trap is connected to the bio-based nylon raw material processing room. The carbon dioxide inlet of the bio-based nylon raw material greenhouse is connected; the oxygen-enriched air outlet of the bio-based nylon raw material greenhouse is connected to the secondary air outlet of the circulating fluidized bed boiler; the outlet of the condensate tank is connected to the inlet of the low-pressure economizer; the outlet of the low-pressure economizer is connected to the inlet of the greenhouse heat exchanger; the outlet of the greenhouse heat exchanger is connected to the inlet of the low-pressure heater; the outlet of the low-pressure heater is connected to the inlet of the deaerator; the bio-based nylon raw material outlet of the bio-based nylon raw material greenhouse is connected to the inlet of the bio-based nylon raw material processing chamber; the product outlet of the bio-based nylon raw material processing chamber is connected to the inlet of the bio-based nylon device; the by-product outlet of the bio-based nylon raw material processing chamber is connected to the inlet of the by-product treatment system; and the outlet of the by-product treatment system is connected to the fuel inlet of the circulating fluidized bed boiler.

2. The CO2 comprehensive treatment device according to claim 1, characterized in that, The carbon dioxide trap includes a housing, with an air inlet on one side and an exhaust outlet on the other side. The bottom of the housing is open and abuts against a sealing plate. The sealing plate is adjustable in height, and a support plate is detachably mounted on its top, located inside the housing. Several hollow columnar carbon dioxide separation membranes are fixed on the support plate. The top of each carbon dioxide separation membrane abuts against the top of the housing, and a through hole is opened on the corresponding top of the housing. A gas collection hood is fixed on the top of the housing, and the through holes are all located inside the gas collection hood. The carbon dioxide emission outlet of the carbon dioxide trap is located on the top of the gas collection hood.

3. The CO2 comprehensive treatment device according to claim 2, characterized in that, A hydraulic cylinder is vertically fixed below the sealing plate, with the piston rod of the hydraulic cylinder facing upward and fixedly connected to the bottom of the sealing plate.

4. The CO2 comprehensive treatment device according to claim 2, characterized in that, The support plate has a cavity, and a long strip-shaped through groove communicating with the bottom surface of the support plate is opened at the center of the bottom of the cavity. Positioning plates are fixed on the bottom of the support plate on both sides of the through groove. Positioning grooves are opened on the sealing plates corresponding to the positioning plates. A motor is built into the sealing plate corresponding to the through groove. The output shaft of the motor extends upward out of the sealing plate and is fixedly connected to the limiting plate. The support plate abuts against the sealing plate. The positioning plate is inserted into the corresponding positioning groove. The limiting plate extends into the cavity through the through groove and its bottom surface is flush with the bottom surface of the cavity. The limiting plate rotates 90 degrees and abuts against the bottom of the cavity.

5. The CO2 comprehensive treatment device according to claim 2, characterized in that, A sealing ring is fixed on the top surface of the sealing plate corresponding to the shell and on the top of each carbon dioxide separation membrane.

6. The CO2 comprehensive treatment device according to claim 2, characterized in that, A compressor is fixedly mounted on the outer side of the shell, and an air pump is fixedly mounted on the top of the gas collection hood. The air inlet of the carbon dioxide trap is connected to the air outlet of the compressor. The air inlet of the compressor is connected to the air outlet of the low-pressure economizer. The carbon dioxide emission port of the carbon dioxide trap is connected to the air inlet of the air pump. The air outlet of the air pump is connected to the carbon dioxide inlet of the bio-based nylon raw material greenhouse.

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