Pressure swing adsorption tower for dual-carbon adsorption separation

Abstract

The invention discloses a pressure swing adsorption tower for dual-carbon adsorption separation, and belongs to the technical field of waste gas treatment.The pressure swing adsorption tower comprises a gas washing device, a gas inlet is communicated with the lower portion of the left side of the gas washing device, a connecting pipe is communicated with the upper portion of the right side of the gas washing device, and a first air compressor used for pressurizing gas in the connecting pipe is arranged in the middle of the connecting pipe; the tail end of the connecting pipe is communicated with a gas dryer, the top of the gas dryer is communicated with a gas outlet pipe I, the tail end of the gas outlet pipe I is communicated with two gas outlet branch pipes I, the middle parts of the gas outlet branch pipes I are provided with control valves I, and the tail ends of the gas outlet branch pipes I are communicated with an adsorption tower A and an adsorption tower B; the adsorption tower C and the adsorption tower D can further separate miscellaneous gas, so that the recycling efficiency of each component in the gas is improved, and the economic benefit brought by the operation of the device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas treatment, and in particular to a pressure swing adsorption tower for dual-carbon adsorption separation. Background Art

[0002] "Dual carbon" is the abbreviation of carbon peak and carbon neutrality. Carbon peak refers to the process in which carbon dioxide emissions reach a historical high and then enter a continuous decline after a plateau period. It is the historical turning point in which carbon dioxide emissions turn from increasing to decreasing. Carbon neutrality refers to the total amount of greenhouse gas emissions directly or indirectly generated by an enterprise, group or individual within a certain period of time. Through afforestation, energy conservation and emission reduction, etc., the carbon dioxide emissions generated by the enterprise, group or individual are offset to achieve "zero emissions" of carbon dioxide.

[0003] The dual carbon goals are proposed to respond to global climate change, reduce greenhouse gas emissions, and achieve sustainable development. As the world's largest developing country, China has actively responded to the call of the international community and proposed the goals of carbon peak and carbon neutrality, and incorporated them into the overall layout of ecological civilization construction and the overall economic and social development, and coordinated the promotion of carbon reduction, pollution reduction, green expansion, and growth, achieving remarkable results.

[0004] Pressure swing adsorption tower is a kind of equipment used for gas separation and purification, which is widely used in industrial production. Its working principle is based on the adsorption and desorption characteristics of different gases on specific adsorbents, and the separation of gases is achieved by changing the pressure.

[0005] Working principle:

[0006] Adsorption process: Under high pressure, the gas mixture passes through the adsorbent bed, some of the components are adsorbed on the adsorbent surface, and the target gas passes through the bed. Desorption process: By reducing the pressure, the impurity gas adsorbed on the adsorbent is desorbed, and the adsorbent is regenerated, so that the next round of adsorption process can be carried out.

[0007] Combustion waste gas contains a large amount of carbon dioxide. The existing carbon dioxide capture equipment has too high capture cost and low capture efficiency. There is little equipment that can recycle waste gas to improve the economic benefits of the enterprise. Therefore, a pressure swing adsorption tower for dual carbon adsorption separation is needed. Summary of the invention

[0008] In order to solve the above technical problems, the present invention provides a pressure swing adsorption tower for dual carbon adsorption separation.

[0009] The technical solution of the present invention is: a pressure swing adsorption tower for dual carbon adsorption separation, comprising a scrubber, an air inlet is connected to the lower left side of the scrubber, a connecting pipe is connected to the upper right side of the scrubber, an air compressor for pressurizing the gas in the connecting pipe is provided in the middle of the connecting pipe, a gas dryer is connected to the end of the connecting pipe, an outlet pipe is connected to the top of the gas dryer, the end of the outlet pipe is connected to two outlet branch pipes, a control valve is provided in the middle of the outlet branch pipe, an adsorption tower A and an adsorption tower B are connected to the end of the outlet branch pipe, the top of the adsorption tower A and the adsorption tower B are fixedly connected to an exhaust pipe 1 and an exhaust pipe 2, the ends of the two exhaust pipes 1 are commonly connected to a target gas tank, the ends of the two exhaust pipes 2 are commonly connected to a miscellaneous gas tank, and control valves 2 are provided on the two exhaust pipes 1 and the two exhaust pipes 2.

[0010] Furthermore, air compressor 2 is provided in the middle of exhaust pipe 1 and exhaust pipe 2.

[0011] Description: Air compressor 2 on exhaust pipe 1 and exhaust pipe 2 is used to further compress the high-pressure gas into the mixed gas tank and the target gas tank.

[0012] Furthermore, the gas washing device includes a rinsing chamber, the top of the rinsing chamber is fixedly connected to a water tank, the bottom of the water tank is fixedly connected to a water pump 1, the water outlet of the water pump 1 is connected to a water outlet pipe, the top inner wall of the rinsing chamber is fixedly connected to a nozzle, the nozzle is connected to the water outlet pipe, the bottom of the rinsing chamber is fixedly connected to a water pump 2, the water outlet of the water pump 2 is connected to a return pipe, the end of the return pipe is connected to the top of the water tank, and the bottom side wall of the rinsing chamber is connected to a sewage outlet.

[0013] Description: The suspended particles and smoke entering the gas are removed through the nozzle, and the water at the bottom of the leaching chamber is pumped back into the water tank by the second water pump. This structure is conducive to saving leaching water.

[0014] Furthermore, the gas dryer includes a drying chamber, the lower left side of the drying chamber is connected to the connecting pipe, a filter plate is fixedly connected in the drying chamber, a plurality of air filter tubes are fixedly connected above the filter plate, and a desiccant is laid on the filter plate.

[0015] Description: The gas containing moisture is dried by the desiccant in the drying chamber to remove moisture from the gas. The dried gas is discharged into the top of the drying chamber through the gas filter pipe. Multiple gas filter pipes improve the efficiency of gas drying.

[0016] Furthermore, the adsorption tower A and the adsorption tower B have the same structure and both include an adsorption bin, an air inlet interface is provided at the bottom of the adsorption bin, the air inlet interface is connected to the air outlet branch pipe, an air pressure sensor is fixedly connected to the bottom and top of the adsorption bin, an air pressure display is fixedly connected to the upper and lower outer walls of the adsorption bin, the air pressure display is electrically connected to the air pressure sensor, a filter bracket is fixedly connected to the lower part of the interior of the adsorption bin, an air filter cartridge is fixedly connected to the middle part above the filter bracket, and an adsorbent is laid above the filter bracket.

[0017] Note: The gas pressure entering the adsorption bin is relatively high. After the components in the gas are adsorbed by the adsorbent, the gas content above the adsorption bin is lower than the gas content at the bottom of the adsorption bin, resulting in the gas pressure at the top of the adsorption bin being lower than the gas pressure at the bottom of the adsorption bin. When the adsorption capacity of the adsorbent reaches saturation, the gas pressure at the top of the adsorption bin will rise to a certain value, and the adsorbent needs to be desorbed at this time.

[0018] Furthermore, the top of the miscellaneous gas tank is fixedly connected with an outlet pipe 2, the end of the outlet pipe 2 is connected with two outlet branch pipes 2, the ends of the two outlet branch pipes 2 are respectively connected with an adsorption tower C and an adsorption tower D, the structures of the adsorption tower C and the adsorption tower D are the same as those of the adsorption tower A and the adsorption tower B, the tops of the adsorption tower C and the adsorption tower D are both connected with an exhaust pipe 3 and an exhaust pipe 4, the ends of the two exhaust pipes 3 are commonly connected with an air storage tank 1, the ends of the two exhaust pipes 4 are commonly connected with an air storage tank 2, and control valves 3 are provided on the exhaust pipes 3 and 4.

[0019] Description: When the gas connected to the air inlet is air, the adsorbent in adsorption tower A and adsorption tower B is selected to be an adsorbent that can adsorb oxygen and carbon dioxide gases, allowing nitrogen in the air to enter the target gas tank for collection, and carbon dioxide and oxygen to enter the mixed gas tank. The carbon dioxide gas and oxygen in the mixed gas tank pass through the carbon dioxide adsorbent or oxygen adsorbent in adsorption tower C and adsorption tower D, and the carbon dioxide gas is separated in gas storage tank one and gas storage tank two. This structure can realize the recycling of multiple gases.

[0020] Furthermore, an air compressor three is provided on each of the exhaust pipe three and the exhaust pipe four.

[0021] Note: The gas in exhaust pipe three and exhaust pipe four is further charged into gas storage tank one and gas storage tank two through air compressor three, thereby increasing the gas storage capacity of gas storage tank one and gas storage tank two.

[0022] Furthermore, the top of the miscellaneous gas tank is connected to an exhaust pipe, a control valve four is provided on the exhaust pipe, and the exhaust pipe is provided with an exhaust gas treatment device at the end thereof.

[0023] Description: The acidic gas in the miscellaneous gas tank is treated through the waste gas pipe and then collected to reduce the pollution of the waste gas to the environment.

[0024] Furthermore, the waste gas treatment device includes a treatment chamber added with alkali solution, a microporous aeration pipe is fixedly connected to the bottom of the treatment chamber, an air inlet of the microporous aeration pipe is connected to the waste gas pipe, and a vent is fixedly connected to the top of the treatment chamber.

[0025] Description: By increasing the contact area between the waste gas and the alkali solution through the microporous aeration tube, the acidic gas in the waste gas can be removed efficiently.

[0026] The beneficial effects of the present invention are:

[0027] (1) The present invention uses a gas scrubber to remove suspended particles and dust from the incoming gas to improve air purity, and then dries the gas through a gas dryer. This method has a good dust removal effect on the incoming gas and has a low component. The adsorption tower A and the adsorption tower B alternately adsorb and desorb to continuously and hot output the target gas and impurities.

[0028] (2) The adsorption tower C and the adsorption tower D added in the present invention can further separate the impurities, improve the recovery efficiency of each component in the gas, and improve the economic benefits brought by the operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a top view of the structure of the present invention.

[0030] Figure 2 It is a structural front view of the gas washing device of the present invention.

[0031] Figure 3 It is a structural front view of the gas dryer of the present invention.

[0032] Figure 4 It is a structural front view of adsorption towers A and B of the present invention.

[0033] Figure 5 It is a left side view of the structure of the exhaust gas treatment device of the present invention.

[0034] Among them, 1-gas washing device, 2-air inlet, 3-connecting pipe, 4-air compressor 1, 5-gas dryer, 51-air outlet pipe 1, 52-air outlet branch pipe 1, 53-control valve 1, 6-adsorption tower A, 7-adsorption tower B, 61-exhaust pipe 1, 62-exhaust pipe 2, 63-control valve 2, 8-target gas tank, 9-miscellaneous gas tank, 64-air compressor 2, 11-rinsing chamber, 12-water tank, 13-water pump 1, 14-water outlet pipe, 15-nozzle, 16-water pump 2, 17-reflux pipe, 18-drainage outlet, 54-drying chamber, 55-filter plate, 56-filter pipe, 57 -desiccant, 71-adsorption chamber, 72-air inlet interface, 73-air pressure sensor, 74-air pressure display, 75-filter bracket, 76-air filter cartridge, 77-adsorbent, 91-air outlet pipe 2, 92-air outlet branch pipe 2, 101-adsorption tower C, 102-adsorption tower D, 103-exhaust pipe 3, 104-exhaust pipe 4, 105-gas storage tank 1, 106-gas storage tank 2, 107-control valve 3, 108-air compressor 3, 93-exhaust pipe, 94-control valve 4, 95-exhaust treatment device, 951-treatment chamber, 952-microporous aeration pipe, 953-vent. DETAILED DESCRIPTION

[0035] Embodiment 1:

[0036] like Figure 1 As shown, a pressure swing adsorption tower for double carbon adsorption separation comprises a scrubber 1, an air inlet 2 is connected to the lower left side of the scrubber 1, a connecting pipe 3 is connected to the upper right side of the scrubber 1, an air compressor 4 for pressurizing the gas in the connecting pipe 3 is provided in the middle of the connecting pipe 3, a gas dryer 5 is connected to the end of the connecting pipe 3, a gas outlet pipe 51 is connected to the top of the gas dryer 5, an outlet pipe 51 is connected to the end of the outlet pipe 51 is connected to two outlet branch pipes 52, a control valve 53 is provided in the middle of the outlet branch pipe 52, an adsorption tower A6 and an adsorption tower B7 are connected to the end of the outlet branch pipe 52, an exhaust pipe 61 and an exhaust pipe 62 are fixedly connected to the top of the adsorption tower A6 and the adsorption tower B7, the ends of the two exhaust pipes 61 are commonly connected to a target gas tank 8, the ends of the two exhaust pipes 62 are commonly connected to a miscellaneous gas tank 9, and the two exhaust pipes 61 and the two exhaust pipes 62 are both provided with a control valve 63.

[0037] An air compressor 2 64 is provided in the middle of the exhaust pipe 1 61 and the exhaust pipe 2 62 .

[0038] The air compressor 2 64 on the exhaust pipe 1 61 and the exhaust pipe 2 62 is used to further compress the high-pressure gas into the mixed gas tank 9 and the target gas tank 8.

[0039] like Figure 2As shown, the gas washing device 1 includes a rinsing chamber 11, the top of the rinsing chamber 11 is fixedly connected to a water tank 12, the bottom of the water tank 12 is fixedly connected to a water pump 13, the water outlet of the water pump 13 is connected to a water outlet pipe 14, the top inner wall of the rinsing chamber 11 is fixedly connected to a nozzle 15, the nozzle 15 is connected to the water outlet pipe 14, the bottom of the rinsing chamber 11 is fixedly connected to a water pump 16, the water outlet of the water pump 16 is connected to a return pipe 17, the end of the return pipe 17 is connected to the top of the water tank 12, and the bottom side wall of the rinsing chamber 11 is connected to a sewage outlet 18.

[0040] The suspended particles and smoke entering the gas are removed by the nozzle 15, and the water pump 16 pumps the water at the bottom of the rinsing chamber 11 back into the water tank 12. Such a structure is conducive to saving rinsing water.

[0041] like Figure 3 As shown, the gas dryer 5 includes a drying chamber 54, the lower left side of the drying chamber 54 is connected to the connecting pipe 3, a filter plate 55 is fixedly connected inside the drying chamber 54, a plurality of air filter tubes 56 are fixedly connected above the filter plate 55, and a desiccant 57 is laid on the filter plate 55.

[0042] The gas containing moisture is dried by the desiccant 57 in the drying chamber 54 to remove moisture from the gas. The dried gas is discharged into the top of the drying chamber 54 through the gas filter pipe 56. Multiple gas filter pipes 56 improve the efficiency of gas drying.

[0043] like Figure 4 As shown, the adsorption tower A6 and the adsorption tower B7 have the same structure and both include an adsorption bin 71. An air inlet interface 72 is provided at the bottom of the adsorption bin 71, and the air inlet interface 72 is connected to the air outlet branch pipe 52. An air pressure sensor 73 is fixedly connected to the bottom and top of the adsorption bin 71. An air pressure display 74 is fixedly connected to the upper and lower outer walls of the adsorption bin 71. The air pressure display 74 is electrically connected to the air pressure sensor 73. A filter bracket 75 is fixedly connected to the lower part of the interior of the adsorption bin 71, and an air filter cartridge 76 is fixedly connected to the middle part above the filter bracket 75. An adsorbent 77 is laid above the filter bracket 75.

[0044] The gas pressure when entering the adsorption bin 71 is relatively high. After the components in the gas are adsorbed by the adsorbent 77, the gas content above the adsorption bin 71 is lower than the gas content at the bottom of the adsorption bin 71, resulting in the gas pressure at the top of the adsorption bin 71 being lower than the gas pressure at the bottom of the adsorption bin 71. When the adsorption capacity of the adsorbent 77 reaches saturation, the gas pressure at the top of the adsorption bin 71 will rise to a certain value, and at this time the adsorbent 77 needs to be desorbed.

[0045] In this embodiment, the gas connected to the air inlet 2 is combustion waste gas, which mainly contains nitrogen, carbon dioxide and a small amount of acidic gas. The adsorbent uses a nitrogen adsorbent or a carbon dioxide adsorbent. When a nitrogen adsorbent is used, carbon dioxide gas and a small amount of acidic gas enter the miscellaneous gas tank for collection during the adsorption process, and nitrogen enters the target gas tank for collection during the desorption process. When a carbon dioxide adsorbent is used as the adsorbent, nitrogen enters the target gas tank for collection during the adsorption process, and carbon dioxide and a small amount of acidic gas enter the miscellaneous gas tank for collection. Since the nitrogen content in the combustion waste gas is higher than that of carbon dioxide gas, the efficiency of separating the gas using a carbon dioxide adsorbent is the highest.

[0046] Embodiment 2:

[0047] The difference between this embodiment and embodiment 1 is that in this embodiment, the top of the impurity tank 9 is connected to an exhaust pipe 93, a control valve 94 is provided on the exhaust pipe 93, and the exhaust pipe 93 is provided with an exhaust gas treatment device 95 at the end of the exhaust pipe 93.

[0048] like Figure 5 As shown, the waste gas treatment device 95 includes a treatment chamber 951 added with alkali solution, a microporous aeration pipe 952 is fixedly connected to the bottom of the treatment chamber 951, an air inlet 2 of the microporous aeration pipe 952 is connected to the waste gas pipe 93, and a vent 953 is fixedly connected to the top of the treatment chamber 951. The alkali solution can be a sodium hydroxide solution with a mass percentage concentration of 10%.

[0049] Compared with Example 1, this embodiment processes the acidic gas in the impurity gas tank 9 through the waste gas pipe 93, and then collects it through the gas release port, thereby reducing the pollution of the waste gas to the environment and recycling the components in the waste gas. The contact area between the waste gas and the alkali solution is increased through the microporous aeration pipe 952, so that the acidic gas in the waste gas can be removed efficiently.

[0050] Embodiment 3:

[0051] The difference between this embodiment and embodiment 2 is that, in this embodiment, the top of the impurity tank 9 is fixedly connected with an outlet pipe 2 91, the end of the outlet pipe 2 91 is connected with two outlet branch pipes 2 92, the ends of the two outlet branch pipes 2 92 are respectively connected with an adsorption tower C101 and an adsorption tower D102, the structures of the adsorption tower C101 and the adsorption tower D102 are the same as those of the adsorption tower A6 and the adsorption tower B7, the tops of the adsorption tower C101 and the adsorption tower D102 are both connected with an exhaust pipe 3 103 and an exhaust pipe 4 104, the ends of the two exhaust pipes 3 103 are commonly connected with an air storage tank 1 105, the ends of the two exhaust pipes 4 104 are commonly connected with an air storage tank 2 106, and the exhaust pipe 3 103 and the exhaust pipe 4 104 are both provided with a control valve 3 107.

[0052] Air compressor three 108 is provided on exhaust pipe three 103 and exhaust pipe four 104.

[0053] Compared with Example 2, the gas connected to the air inlet 2 in this embodiment is air, and the adsorbent 77 in the adsorption tower A6 and the adsorption tower B7 is selected to be an adsorbent capable of adsorbing oxygen and carbon dioxide gas, so that nitrogen in the air enters the target gas tank 8 for collection, and carbon dioxide and oxygen enter the mixed gas tank 9. The carbon dioxide gas and oxygen in the mixed gas tank 9 pass through the carbon dioxide adsorbent or oxygen adsorbent in the adsorption tower C101 and the adsorption tower D102, and the carbon dioxide gas and oxygen are separated in the gas storage tank 1 105 and the gas storage tank 2 106. This structure can realize the recycling of multiple gases. The gas in the exhaust pipe 3 103 and the exhaust pipe 4 104 is further filled into the gas storage tank 1 105 and the gas storage tank 2 106 through the air compressor 3, so as to increase the gas storage capacity of the gas storage tank 1 105 and the gas storage tank 2 106.

[0054] The working principle of a pressure swing adsorption tower for dual carbon adsorption separation in the above-mentioned embodiment 2 is as follows:

[0055] The exhaust gas generated by combustion is connected to the air inlet 2. The exhaust gas passes through the leaching chamber 11 and is collided with the water mist sprayed by the nozzle 15. The dust and suspended particles in the gas fall into the bottom of the leaching chamber 11 with the water mist. The water falling into the bottom of the leaching chamber 11 is then pumped to the water tank for recycling by the water pump 16 at the bottom of the leaching chamber 11.

[0056] The gas after elution enters the connecting pipe 3 and then enters the drying chamber 54. The moisture in the gas is adsorbed by the desiccant 57. The dried gas enters the outlet pipe 1 51 and the outlet branch pipe 1 through the filter pipe 56 and enters the adsorption tower A or the adsorption tower B. The gas undergoes an alternating process of adsorption and desorption in the adsorption tower A and the adsorption tower B. The adsorbent in the adsorption tower A and the adsorption tower B adopts carbon dioxide adsorbent. During the adsorption process, the adsorbent adsorbs carbon dioxide, and nitrogen enters the target gas tank 8 from the exhaust pipe 1 61. During the desorption process, the carbon dioxide gas desorbs from the adsorbent and enters the impurity tank 9 through the exhaust pipe 2 62. The gas in the impurity tank 8 enters the processing chamber 951 again, and the gas is evenly dispersed in the alkali solution through the microporous aeration pipe 952, so that the acidic gas in the gas is neutralized with the alkali solution, and the acidic gas in the carbon dioxide gas is removed, and then the carbon dioxide gas is collected and reused through the vent 953.

[0057] The working principle of a pressure swing adsorption tower for dual carbon adsorption separation in the above-mentioned embodiment 3 is as follows:

[0058] The exhaust gas generated by combustion is connected to the air inlet 2. The exhaust gas passes through the leaching chamber 11 and is collided with the water mist sprayed by the nozzle 15. The dust and suspended particles in the gas fall into the bottom of the leaching chamber 11 with the water mist. The water falling into the bottom of the leaching chamber 11 is then pumped to the water tank for recycling by the water pump 16 at the bottom of the leaching chamber 11.

[0059] The eluted gas enters the connecting pipe 3 and then enters the drying chamber 54. The moisture in the gas is adsorbed by the desiccant 57. The dried gas enters the outlet pipe 1 51 and the outlet branch pipe 1 through the filter pipe 56 and enters the adsorption tower A or the adsorption tower B. The gas undergoes an alternating process of adsorption and desorption in the adsorption tower A and the adsorption tower B. The adsorbent in the adsorption tower A and the adsorption tower B adopts a mixed adsorbent of carbon dioxide adsorbent and oxygen adsorbent. During the adsorption process, the adsorbent adsorbs carbon dioxide and oxygen. Nitrogen enters the target gas tank 8 from the exhaust pipe 1 61. During the desorption process, carbon dioxide gas and oxygen are desorbed from the adsorbent and enter the miscellaneous gas tank 9 through the exhaust pipe 2 62. The mixed gas of carbon dioxide and oxygen in the impurity tank 9 is then discharged into the adsorption tower C or the adsorption tower D. The adsorbent in the adsorption tower C and the adsorption tower D is carbon dioxide or oxygen adsorbent. When the adsorption tower C and the adsorption tower D use carbon dioxide adsorbent, during the adsorption process, oxygen is discharged to the gas storage tank 1 105 through the exhaust pipe 3 103, and during the desorption process, carbon dioxide gas is discharged to the gas storage tank 2 106 through the exhaust pipe 4 104. When the adsorption tower C and the adsorption tower D use oxygen adsorbent, during the adsorption process, carbon dioxide gas is discharged to the gas storage tank 2 106 through the exhaust pipe 4 104, and during the desorption process, oxygen is discharged to the gas storage tank 1 105 through the exhaust pipe 3 103.

[0060] In the above embodiments, air compressor 1 4, control valve 1 53, control valve 2 63, air compressor 2 64, water pump 1 13, water pump 2 16, air pressure sensor 73, air pressure display 74, control valve 3 107, air compressor 3 108, control valve 4 94, adsorbent 77, and desiccant 57 are commercially available products. As long as the functions of the present invention can be achieved, those skilled in the art can choose to use them according to common sense and no special limitation is made herein.

Claims

1. A pressure swing adsorption tower for dual carbon adsorption separation, characterized in that: The invention comprises a gas washing device (1), wherein the lower left side of the gas washing device (1) is connected to an air inlet (2), the upper right side of the gas washing device (1) is connected to a connecting pipe (3), the middle of the connecting pipe (3) is provided with an air compressor (4) for pressurizing the gas in the connecting pipe (3), the end of the connecting pipe (3) is connected to a gas dryer (5), the top of the gas dryer (5) is connected to an outlet pipe (51), the end of the outlet pipe (51) is connected to two outlet branch pipes (52), the middle of the outlet branch pipe (52) is provided with A control valve 1 (53); the end of the outlet branch pipe 1 (52) is connected to an adsorption tower A (6) and an adsorption tower B (7); the tops of the adsorption tower A (6) and the adsorption tower B (7) are fixedly connected to an exhaust pipe 1 (61) and an exhaust pipe 2 (62); the ends of the two exhaust pipes 1 (61) are commonly connected to a target gas tank (8); the ends of the two exhaust pipes 2 (62) are commonly connected to a miscellaneous gas tank (9); and the two exhaust pipes 1 (61) and the two exhaust pipes 2 (62) are both provided with a control valve 2 (63).

2. A pressure swing adsorption tower for dual carbon adsorption separation as claimed in claim 1, characterized in that: Air compressor 2 (64) is provided in the middle of the exhaust pipe 1 (61) and the exhaust pipe 2 (62).

3. A pressure swing adsorption tower for dual carbon adsorption separation as claimed in claim 1, characterized in that: The scrubbing device (1) comprises a rinsing chamber (11), the top of the rinsing chamber (11) is fixedly connected to a water tank (12), the bottom of the water tank (12) is fixedly connected to a water pump (13), the water outlet of the water pump (13) is connected to a water outlet pipe (14), the top inner wall of the rinsing chamber (11) is fixedly connected to a nozzle (15), the nozzle (15) is connected to the water outlet pipe (14), the bottom of the rinsing chamber (11) is fixedly connected to a water pump (16), the water outlet of the water pump (16) is connected to a return pipe (17), the end of the return pipe (17) is connected to the top of the water tank (12), and the bottom side wall of the rinsing chamber (11) is connected to a sewage outlet (18).

4. A pressure swing adsorption tower for dual carbon adsorption separation as claimed in claim 1, characterized in that: The gas dryer (5) comprises a drying chamber (54), the lower left side of the drying chamber (54) is connected to the connecting pipe (3), a filter plate (55) is fixedly connected inside the drying chamber (54), a plurality of air filter pipes (56) are fixedly connected above the filter plate (55), and a desiccant (57) is laid on the filter plate (55).

5. A pressure swing adsorption tower for dual carbon adsorption separation as claimed in claim 1, characterized in that: The adsorption tower A (6) and the adsorption tower B (7) have the same structure, both comprising an adsorption bin (71), an air inlet interface (72) being provided at the bottom of the adsorption bin (71), the air inlet interface (72) being communicated with the air outlet branch pipe 1 (52), an air pressure sensor (73) being fixedly connected to the bottom and top of the adsorption bin (71), an air pressure display (74) being fixedly connected to the upper and lower outer walls of the adsorption bin (71), the air pressure display (74) being electrically connected to the air pressure sensor (73), a filter bracket (75) being fixedly connected to the lower part of the interior of the adsorption bin (71), an air filter cartridge (76) being fixedly connected to the middle part above the filter bracket (75), and an adsorbent (77) being laid above the filter bracket (75).

6. A pressure swing adsorption tower for dual carbon adsorption separation as claimed in claim 5, characterized in that: The top of the impurity gas tank (9) is fixedly connected to an outlet pipe 2 (91), the end of the outlet pipe 2 (91) is connected to two outlet branch pipes 2 (92), the ends of the two outlet branch pipes 2 (92) are respectively connected to an adsorption tower C (101) and an adsorption tower D (102), the structures of the adsorption tower C (101) and the adsorption tower D (102) are the same as the structures of the adsorption tower A (6) and the adsorption tower B (7), the tops of the adsorption tower C (101) and the adsorption tower D (102) are both connected to an exhaust pipe 3 (103) and an exhaust pipe 4 (104), the ends of the two exhaust pipes 3 (103) are commonly connected to an air storage tank 1 (105), the ends of the two exhaust pipes 4 (104) are commonly connected to an air storage tank 2 (106), and the exhaust pipe 3 (103) and the exhaust pipe 4 (104) are both provided with a control valve 3 (107).

7. A pressure swing adsorption tower for dual carbon adsorption separation as claimed in claim 6, characterized in that: Air compressor three (108) is provided on the exhaust pipe three (103) and the exhaust pipe four (104).

8. A pressure swing adsorption tower for dual carbon adsorption separation as claimed in claim 1, characterized in that: The top of the impurity gas tank (9) is connected to an exhaust gas pipe (93), a control valve (94) is provided on the exhaust gas pipe (93), and the exhaust gas pipe (93) is provided with an exhaust gas treatment device (95) at the end thereof.

9. A pressure swing adsorption tower for dual carbon adsorption separation as claimed in claim 1, characterized in that: The top of the impurity gas tank (9) is connected to an exhaust gas pipe (93), and a control valve four (94) is provided on the exhaust gas pipe (93).

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