Compost tail gas purification and carbon dioxide capture and utilization integrated system

Abstract

The utility model relates to the technical field of agricultural application, in particular to a composting tail gas purification and carbon dioxide capture and utilization integrated system, which solves the problem that carbon dioxide in composting tail gas of a reactor is not treated in the prior art and comprises a composting reactor, and a gas outlet end of the composting reactor is connected with a tail gas purification module. The gas outlet end of the tail gas purification module is connected with a carbon dioxide capture module, and the carbon dioxide output end of the carbon dioxide capture module is connected with the gas fertilizer application module. The device has the beneficial effects that after the tail gas exhausted by the composting reactor is subjected to dust fall and deodorization by the tail gas purification module, carbon dioxide in the tail gas is collected by the carbon dioxide capture module, so that the carbon dioxide is prevented from being directly exhausted into air, and the emission of the carbon dioxide is reduced; the extracted carbon dioxide is introduced into a greenhouse through a gas distribution pipeline for photosynthesis of crops, so that the photosynthesis intensity and efficiency of the crops are improved, root development is promoted, and the disease resistance and stress resistance of the crops are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural applications, in particular to an integrated system for compost tail gas purification and carbon dioxide capture and utilization. Background Art

[0002] With the rapid development of China's animal husbandry, the treatment and resource utilization of livestock and poultry manure have become key constraints on the development of animal husbandry. Aerobic composting can convert livestock and poultry manure into stable organic fertilizer and realize the combination of planting and breeding and circular agriculture. Reactor composting refers to a composting process that uses a closed reactor that integrates feeding and discharging, aeration, stirring and deodorization for aerobic fermentation. It has the advantages of short fermentation cycle, small footprint, good insulation and energy saving effect, high degree of automation, and easy centralized treatment of odor. It has gradually become the mainstream manure treatment technology in domestic livestock and poultry farms. In the process of reactor composting, livestock and poultry manure will produce odors such as ammonia, hydrogen sulfide, methyl mercaptan, dust, microbial aerosols, carbon dioxide greenhouse gas, etc. Direct emissions will pollute the surrounding air environment and cause residents to complain about odor; on the other hand, the concentration of carbon dioxide emitted by the composting reactor can reach 25%. Direct emissions not only aggravate the greenhouse effect, but also a waste of resources.

[0003] The patent with publication number CN117654170A discloses a system and method for deodorization and ammonia recovery of a composting reactor. The system includes a dust reduction unit, a preheating unit, an ammonia recovery unit, a cooling and reflux unit, and a deodorization unit. The odors generated by multiple closed composting reactors are uniformly collected and sent to the dust reduction unit for efficient dust reduction. After being heated to a set temperature by the preheating unit, the odor enters the ammonia recovery unit to efficiently separate the ammonia in the odor. The separated ammonia is then passed through the cooling and reflux unit to form ammonia water and residual gas. The ammonia water is further distilled and concentrated after reflux until it reaches a set concentration and then discharged into an ammonia water storage tank for storage. The residual gas enters the deodorization unit for spraying and deodorization and is discharged after meeting the standard. The system and method provided by the present invention simultaneously treat high ammonia odor and deodorization wastewater while realizing the recovery of ammonia. The recovered high-concentration ammonia water can be used as a liquid fertilizer raw material to generate income. The above composting reactor is equipped with a dust reduction unit and a deodorization unit to reduce dust and deodorize the odor generated by the composting reactor. However, there is still a large amount of carbon dioxide in the composting tail gas that has not been processed, which is likely to aggravate the greenhouse effect. Utility Model Content

[0004] The utility model provides an integrated system for compost tail gas purification and carbon dioxide capture and utilization, which solves the problem in the prior art that carbon dioxide in reactor compost tail gas is not treated and aggravates the greenhouse effect.

[0005] The technical solution of the utility model is achieved in this way:

[0006] A composting tail gas purification and carbon dioxide capture and utilization integrated system includes a composting reactor, a tail gas purification module is connected to the gas outlet of the composting reactor, a carbon dioxide capture module is connected to the gas outlet of the tail gas purification module, and the carbon dioxide output end of the carbon dioxide capture module is connected to a gas fertilizer application module. After the tail gas purification module performs dust reduction and deodorization on the tail gas discharged from the composting reactor, the carbon dioxide in the tail gas is collected by the carbon dioxide capture module to avoid direct discharge of carbon dioxide into the air, reduce carbon dioxide emissions, and reduce the impact on the greenhouse effect. At the same time, the carbon dioxide is introduced into a greenhouse planting shed through the gas fertilizer application module for photosynthesis of crops, thereby improving the intensity and efficiency of crop photosynthesis.

[0007] The carbon dioxide capture module includes a capture tower, an electrochemical desorption reactor and a flash tank, the gas outlet of the tail gas purification module is connected to the gas inlet of the capture tower, the electrochemical desorption reactor includes an anode chamber and a cathode chamber, the capture tower liquid outlet of the capture tower is connected to the anode chamber liquid inlet of the anode chamber, the anode chamber liquid outlet of the anode chamber is connected to the flash tank liquid inlet of the flash tank, the flash tank liquid outlet is connected to the cathode chamber liquid inlet of the cathode chamber, and the cathode chamber liquid outlet of the cathode chamber is connected to the capture tower. The capture tower separates carbon dioxide from the tail gas by spraying an organic amine solution, and then extracts carbon dioxide from the solution through the electrochemical desorption reactor and the flash tank, and the separated carbon dioxide is passed into a gas storage tank for storage.

[0008] The capture tower is provided with an organic amine solution spraying component and a liquid storage tank; the organic amine solution spraying component is connected to the cathode chamber liquid outlet of the cathode chamber, and the liquid storage tank is connected to the anode chamber liquid inlet of the anode chamber. The organic amine solution is re-introduced into the spraying component for repeated use.

[0009] The electrochemical desorption reactor comprises a shell, in which a plate is arranged, the plate comprises an anode plate and a cathode plate, an ion exchange membrane is arranged between the anode plate and the cathode plate, and the plate is connected to a power source. The power source supplies power to the plate, and the metal copper of the anode plate dissolves into copper ions and enters the solution, and the copper ions replace carbon dioxide and coordinate with organic amines to form a complex, thereby releasing carbon dioxide.

[0010] The flash tank outlet of the flash tank is connected to a gas storage tank, which is connected to the gas fertilizer application module. The flash tank separates carbon dioxide from the solution by gas-liquid separation, and passes the carbon dioxide into the gas storage tank for storage.

[0011] The gas fertilizer application module includes an air distribution pipeline arranged inside the greenhouse planting shed, and the air inlet end of the air distribution pipeline is connected to the air outlet of the gas storage tank. The collected carbon dioxide is introduced into the greenhouse planting shed through the air distribution pipeline as a raw material for crop photosynthesis, thereby improving the intensity and efficiency of crop photosynthesis, promoting root development, improving the disease resistance and stress resistance of crops, improving product quality and significantly increasing yield.

[0012] The greenhouse is provided with a carbon dioxide concentration sensor, and the air distribution pipeline is provided with an electric control valve, and the electric control valve and the carbon dioxide concentration sensor are both connected to the air distribution controller. The carbon dioxide concentration sensor monitors the carbon dioxide concentration in the greenhouse and transmits the monitored concentration information to the controller, and the controller controls the electric control valve to open or close according to the concentration information.

[0013] The tail gas purification module includes a washing tower shell, in which a demister, a deodorizing spray assembly, a deodorizing filter assembly, a sewage filter assembly and a circulating water tank are arranged from top to bottom. The circulating water tank is connected to the deodorizing spray assembly through a circulating water pump. The washing tower shell is provided with a washing tower air inlet, which is located at the lower side of the deodorizing filter assembly. The circulating water tank is connected to a water replenishment and dosing system. The deodorizing spray device sprays deodorizing bacteria liquid to purify the compost tail gas by dust reduction and deodorization. After purification, the tail gas passes through the demister to remove water mist and enters the carbon dioxide capture module.

[0014] The deodorizing filter material assembly includes a first supporting baffle plate arranged on the upper part of the washing tower shell, the first supporting baffle plate is located on the upper side of the air inlet of the washing tower, and a first filtering filler is laid on the first supporting baffle plate. The first filtering filler is a PP plastic filler, and the PP plastic filler adopts an S-wave resistance corrugation design and a honeycomb cross water distribution structure, so that the spray liquid can form a liquid film on the PP plastic filler and stay on the filler surface for a long time.

[0015] The sewage filter assembly comprises a second supporting partition plate arranged at the lower part of the washing tower shell, on which a second filter filler and a third filter filler are laid. The second filter filler and the third filter filler are filter cotton and PP plastic wreath filler.

[0016] The beneficial effects of the utility model are as follows: after the tail gas purification module carries out dust reduction and deodorization on the tail gas discharged from the composting reactor, the carbon dioxide in the tail gas is collected by the carbon dioxide capture module, so as to avoid direct discharge of carbon dioxide into the air, reduce carbon dioxide emissions, and reduce the impact on the greenhouse effect; and the extracted carbon dioxide is passed through the air distribution pipeline into the greenhouse planting shed for crops to photosynthesize, thereby improving the intensity and efficiency of crop photosynthesis, promoting root development, improving the disease resistance and stress resistance of crops, improving product quality and greatly increasing yield. It has important ecological and economic benefits for reducing composting air pollution and realizing the combination of planting and breeding and circular agriculture.

[0017] During the carbon dioxide capture process, an organic amine solution is sprayed to react with carbon dioxide to generate carbamate, and then the organic amine solution is regenerated through electrochemical desorption to separate the carbon dioxide. The organic amine solution can be reused to improve the recycling performance of the carbon dioxide capture module. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the structure of an integrated system for composting tail gas purification and carbon dioxide capture and utilization according to the utility model;

[0020] Figure 2 It is a schematic diagram of the structure of the exhaust gas purification module;

[0021] Figure 3 This is a schematic diagram of the structure of the carbon dioxide capture module;

[0022] Figure 4 This is a schematic diagram of the gas fertilizer application module structure.

[0023] In the figure: 1. Composting reactor; 2. Tail gas purification module; 3. Carbon dioxide capture module; 4. Gas fertilizer application module; 5. Scrubber shell; 6. Defogger; 7. Deodorization spray assembly; 8. Deodorization filter assembly; 9. Scrubber air inlet; 10. Sewage filtration assembly; 11. Circulating water tank; 12. Circulating water pump; 13. Purification controller; 14. First filter filler; 15. First supporting baffle; 16. High-pressure spray water pipe; 17. Spiral nozzle; 18. Second filter filler; 19. Third filter filler; 20. Second supporting baffle; 21. Water replenishment and dosing system; 22. Capture tower; 23. Electrochemical desorption reactor; 24. Flash tank; 25. Gas storage tank; 26. Organic amine solution spray assembly; 27 , liquid storage tank; 28, water pump; 29, high-pressure spray water pipe; 30, spiral nozzle; 31, carbon dioxide capture tower air inlet; 32, carbon dioxide capture tower air outlet; 33, electrochemical desorption reactor shell; 34, plate; 35, ion exchange membrane; 36, terminal; 37, power supply; 38, anode chamber; 39, cathode chamber; 40, anode chamber liquid inlet; 41, capture tower liquid outlet; 42, anode chamber liquid outlet; 43, flash tank liquid inlet; 44, flash tank liquid outlet; 45, cathode chamber liquid inlet; 46, cathode chamber liquid outlet; 47, flash tank air outlet; 48, gas distribution controller; 49, electric control valve; 50, gas distribution pipeline; 51, carbon dioxide concentration sensor; 52, greenhouse planting shed. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Embodiment 1, as Figure 1 As shown, a composting tail gas purification and carbon dioxide capture and utilization integrated system includes a composting reactor 1, the gas outlet end of the composting reactor 1 is connected to a tail gas purification module 2, the gas outlet end of the tail gas purification module 2 is connected to a carbon dioxide capture module 3, and the carbon dioxide output end of the carbon dioxide capture module 3 is connected to a gas fertilizer application module 4. After the tail gas purification module 2 carries out dust reduction and deodorization on the tail gas discharged from the composting reactor 1, the carbon dioxide in the tail gas is collected by the carbon dioxide capture module 3 to avoid direct discharge of carbon dioxide into the air, reduce carbon dioxide emissions, and reduce the impact on the greenhouse effect. It has important ecological and economic benefits for reducing composting air pollution and realizing a circular agriculture combining planting and breeding. At the same time, the carbon dioxide is introduced into the greenhouse planting shed through the gas fertilizer application module 4 for photosynthesis of crops, thereby improving the intensity and efficiency of crop photosynthesis.

[0026] Further, if Figure 3 As shown, the carbon dioxide capture module 3 includes a capture tower 22, an electrochemical desorption reactor 23 and a flash tank 24, the gas outlet of the tail gas purification module 2 is connected to the gas inlet of the capture tower 22, the electrochemical desorption reactor 23 includes an anode chamber 38 and a cathode chamber 39, the capture tower liquid outlet 41 of the capture tower 22 is connected to the anode chamber liquid inlet 40 of the anode chamber 38, the anode chamber liquid outlet 42 of the anode chamber 38 is connected to the flash tank liquid inlet 43 of the flash tank 24, the flash tank liquid outlet 44 is connected to the cathode chamber liquid inlet 45 of the cathode chamber 39, and the cathode chamber liquid outlet 46 of the cathode chamber 39 is connected to the capture tower 22. An organic amine solution spray assembly 26 and a liquid storage tank 27 are provided in the capture tower 22; the organic amine solution spray assembly 26 is connected to the cathode chamber liquid outlet 46 of the cathode chamber 39, and the liquid storage tank 27 is connected to the anode chamber liquid inlet 40 of the anode chamber 38. The tail gas discharged from the tail gas purification module 2 enters the capture tower 22 through the carbon dioxide capture tower air inlet 31, and the organic amine solution spraying component 26 sprays the organic amine solution. After the organic amine solution captures the carbon dioxide in the tail gas, the tail gas is discharged from the carbon dioxide capture tower air outlet 32. At this time, the discharged tail gas does not contain carbon dioxide, reducing the impact of carbon dioxide on the greenhouse effect. The organic amine solution that absorbs carbon dioxide becomes a carbon-rich solution, which falls into the liquid storage tank 27 and then passes into the anode chamber 38 through the water pump 28.

[0027] In this embodiment, the organic amine solution is monoethanolamine (MEA, NH2CH2CH2OH), diethanolamine (DEA, NH(CH2CH2OH)2), N-methyldiethanolamine (MDEA, CH3N(CH2CH2OH)2), isobutanolamine (AMP, NH2C(CH3)2CH2OH), piperazine (C4H 10 N2) and its derivatives. Some of the active amine components have the characteristics of fast absorption rate and can be used to improve the carbon dioxide adsorption rate; some active amine components have the characteristics of large absorption capacity and can be used to increase the adsorption capacity of carbon dioxide. Combining the two types of active amines can obtain both a larger adsorption capacity and a faster adsorption rate. In addition, antioxidants and corrosion inhibitors are added to the organic amine solution to inhibit the formation of peroxides, interrupt the occurrence of degradation reaction chains, and solve the oxidation degradation and corrosion problems of the absorption solvent.

[0028] The principle of using organic amine solution to capture carbon dioxide: organic amine reacts with carbon dioxide to generate relatively stable carbamate, the reaction is as follows:

[0029] CO2+2R1R2NH=R1R2NCOO — +R1R2NH +

[0030] Equilibrium reaction of water:

[0031] 2H2O =H3O + +OH —

[0032] Carbon dioxide reacts with OH- and H2O to form bicarbonate:

[0033] CO2+OH — = HCO3 —

[0034] CO2 + H2O = HCO3 — +H +

[0035] Since there is no hydrogen proton on the nitrogen atom of tertiary amine, tertiary amine and carbon dioxide cannot react to form carbamate, which makes the reaction mechanism between tertiary amine and carbon dioxide significantly different from that of primary amine and secondary amine. Tertiary amine and carbon dioxide react to form unstable bicarbonate, and the reaction rate of tertiary amine and carbon dioxide is significantly lower than that of primary amine and secondary amine and carbon dioxide.

[0036] When the solution pH is ≥13, carbon dioxide reacts with alcoholamine to form alcoholamine carbon dioxide ester:

[0037] CO2+ R1R2NCH2CH2OH + OH— =R1R2NCH2CH2OCO2 — +H2O

[0038] When the solution pH is less than 13, the following reaction occurs:

[0039] CO2 + R1R2R3N + H2O = R1R2R3NH + + HCO3 —

[0040] Further, the electrochemical desorption reactor 23 includes a shell 33, in which a plate 34 is arranged, wherein the plate 34 includes an anode plate and a cathode plate, an ion exchange membrane 35 is arranged between the anode plate and the cathode plate, and the plate 34 is connected to a power supply 37. The anode plate is a plate connected to the positive pole of the power supply 37, and the cathode plate is a plate connected to the negative pole of the power supply 37. The space between the cathode plate, the anode plate and the ion exchange membrane constitutes a polar chamber, which is divided into an anode chamber 38 and a cathode chamber 39. An anode chamber liquid inlet 40 is arranged at the bottom of the anode chamber 38, an anode chamber liquid outlet 42 is arranged at the top of the anode chamber 28, a cathode chamber liquid inlet 45 is arranged at the bottom of the cathode chamber 39, and a cathode chamber liquid outlet 46 is arranged at the top of the cathode chamber 39. In this embodiment, the plate 34 is a metal copper plate, and the ion exchange membrane 35 is an anion exchange membrane or a cation exchange membrane.

[0041] Since the nucleophilicity of copper ions is stronger than that of carbon dioxide, when the power source 37 energizes the electrode plate 34, the metal copper of the anode plate dissolves into metal copper ions and enters the carbon-rich solution. The metal copper ions replace carbon dioxide and coordinate with the organic amine to form a complex, thereby releasing carbon dioxide. The specific reflection is as follows:

[0042] Cu(s)=Cu 2+ (aq)+2e —

[0043] Cu 2+ +2amine-CO2(aq)=Cu(amine)2 2+ (aq)+2CO2

[0044] The released carbon dioxide is separated into gas and liquid through the flash tank 24 and stored in the gas storage tank 25. The copper amine complex solution is transferred to the cathode chamber 39, where a reduction reaction occurs. The copper ions are electroplated onto the cathode plate and the organic amine is regenerated. The carbon dioxide is then input into the carbon dioxide capture tower 22 to capture carbon dioxide and circulate continuously. The reaction is as follows:

[0045] Cu(amine)2 2+ (aq)+2e — =Cu(s)+2amine(aq)

[0046] Embodiment 2 is different from Embodiment 1 in that it is an integrated system for composting tail gas purification and carbon dioxide capture and utilization, wherein a high-pressure spray water pipe 29, an anode chamber liquid outlet 42, a cathode chamber liquid outlet 46 and a flash tank liquid inlet 43 are connected by a first four-way ball valve, and a carbon dioxide capture tower liquid outlet 41, an anode chamber liquid inlet 40, a cathode chamber liquid inlet 45 and a flash tank liquid outlet 44 are connected by a second four-way ball valve. By adjusting the first four-way ball valve and the second four-way ball valve, the liquid inlet and the liquid outlet of the anode chamber and the cathode chamber can be exchanged, and at the same time, the positive and negative electrodes connected to the electrode plate and the power supply 37 can be exchanged, thereby enabling the anode chamber and the cathode chamber to be exchanged, so that the original cathode plate becomes an anode plate, and the original anode plate becomes a cathode plate, and the anode plate and the cathode plate are used in rotation, thereby improving the recycling performance and extending the service life.

[0047] Example 3, based on Example 1, a composting tail gas purification and carbon dioxide capture and utilization integrated system, such as Figure 4 As shown, the flash tank outlet 47 of the flash tank 24 is connected to the gas storage tank 25, and the gas storage tank 25 is connected to the gas fertilizer application module 4. The flash tank 24 separates carbon dioxide from the solution by gas-liquid separation, and passes the carbon dioxide into the gas storage tank 25 for storage.

[0048] Further, the gas fertilizer application module 4 includes an air distribution pipe 50 arranged inside the greenhouse planting shed 52, and the air inlet end of the air distribution pipe 50 is connected to the air outlet of the gas storage tank 25. A carbon dioxide concentration sensor 51 is provided in the greenhouse planting shed 52, and an electric control valve 49 is provided on the air distribution pipe 50. The electric control valve 49 and the carbon dioxide concentration sensor 51 are both connected to the air distribution controller 48. In this embodiment, the air distribution pipe 50 is 2m above the ground, and a hole with a diameter of 2mm is punched on the air distribution pipe every 1 to 1.5m to provide carbon dioxide gas fertilizer for planting crops. The carbon dioxide concentration sensor 51 feeds back the detected carbon dioxide concentration signal to the air distribution controller 48, and the air distribution controller 48 controls the switch of the electric control valve 49 according to the received carbon dioxide concentration signal.

[0049] Specifically, since the photosynthesis of vegetable crops has two peaks during the day, 8:00-11:00 and 14:00-16:00 respectively, the carbon dioxide concentration in the greenhouse decreases rapidly during these two time periods, and the vegetable crops are in a carbon dioxide starvation state. Therefore, the carbon dioxide concentration in the greenhouse is controlled to be 1000-1300ppm during these two time periods. When it is lower than 1000ppm, the air distribution controller 48 opens the electric control valve 49, and the carbon dioxide in the gas storage tank 25 is passed into the greenhouse 52 through the air distribution pipe 50; when it is higher than 1300ppm, the valve is closed to stop releasing carbon dioxide.

[0050] Example 4, based on Example 3, an integrated system for composting tail gas purification and carbon dioxide capture and utilization, such as Figure 2 As shown, the tail gas purification module 2 includes a washing tower shell 5, in which a demister 6, a deodorizing spray assembly 7, a deodorizing filter assembly 8, a sewage filter assembly 10 and a circulating water tank 11 are arranged from top to bottom. The circulating water tank 11 is connected to the deodorizing spray assembly 7 through a circulating water pump 12. A washing tower air inlet 9 is provided on the washing tower shell 5, and the washing tower air inlet 9 is located at the lower side of the deodorizing filter assembly 8. The circulating water tank 11 is connected to a water replenishment and dosing system 21. The tail gas generated by the composting reactor 1 is input into the washing tower air inlet 9 through a pipeline, and the deodorizing spray assembly 7 sprays the deodorizing bacteria liquid to purify the tail gas by dust reduction and deodorization. The purified tail gas is removed from the water mist by the demister 6, and then enters the carbon dioxide capture module 3. The spray liquid is filtered by the sewage filter assembly 10 and enters the circulating water tank 11, so that the spray liquid can be reused. In this embodiment, the demister 6 is made of plastic material, is a V-shaped baffle, and is arranged horizontally.

[0051] Furthermore, the deodorizing spray assembly 7 includes a plurality of uniformly arranged high-pressure spray water pipes 16 , the high-pressure spray water pipes 16 are made of PVC material, and a spiral nozzle 17 is provided on the high-pressure spray water pipe 16 , and the spiral nozzle 17 is made of stainless steel material.

[0052] Furthermore, the deodorizing filter material assembly 8 includes a first supporting baffle 15 disposed on the upper part of the washing tower housing 5, the first supporting baffle 15 is located on the upper side of the washing tower air inlet 9, and a first filtering filler 14 is laid on the first supporting baffle 15. Preferably, the first filtering filler 14 is a PP plastic filler. The PP plastic filler adopts an S-wave resistance corrugation design and a honeycomb cross-water structure, so that the spray liquid can form a liquid film on the PP plastic filler and remain on the filler surface for a long time.

[0053] Further, the sewage filter assembly 10 includes a second support baffle 20 disposed at the lower part of the washing tower housing 5, and a second filter filler 18 and a third filter filler 19 are laid on the second support baffle 20. Preferably, the second filter filler 18 is filter cotton, and the third filter filler 19 is PP plastic rosette filler.

[0054] Furthermore, a circulating water pump 12 is arranged next to the circulating water tank 11, and the circulating water pump 12 is connected to the high-pressure spray water pipe 16 through a water delivery pipe. The circulating water tank 11 is connected to a water replenishment and dosing system 21 for replenishing spray water and deodorant bacteria liquid. The deodorant bacteria liquid is an EM bacteria liquid, the main components of which are photosynthetic bacteria, lactic acid bacteria, yeast bacteria, Gram-positive actinomycetes, filamentous bacteria of the fermentation system, etc., and the effective live bacteria count is greater than 20 billion CFU / ml. The spray water and deodorant bacteria liquid are replenished in a volume ratio of 1:50.

[0055] Furthermore, a purification controller 13 is provided outside the washing tower shell 5 , and the purification controller 13 is connected to the deodorizing spray assembly 7 and the water replenishment and dosing system 21 . Specifically, the purification controller 13 is connected to the circulating water pump 12 to control the start and stop of the circulating water pump 12 .

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An integrated system for composting tail gas purification and carbon dioxide capture and utilization, comprising a composting reactor (1), wherein the gas outlet of the composting reactor (1) is connected to a tail gas purification module (2), characterized in that: The gas outlet end of the tail gas purification module (2) is connected to the carbon dioxide capture module (3), and the carbon dioxide output end of the carbon dioxide capture module (3) is connected to the gas fertilizer application module (4); The carbon dioxide capture module (3) comprises a capture tower (22), an electrochemical desorption reactor (23) and a flash tank (24); the gas outlet of the tail gas purification module (2) is connected to the gas inlet of the capture tower (22); the electrochemical desorption reactor (23) comprises an anode chamber (38) and a cathode chamber (39); the capture tower liquid outlet (41) of the capture tower (22) is connected to the anode chamber liquid inlet (40) of the anode chamber (38); the anode chamber liquid outlet (42) of the anode chamber (38) is connected to the flash tank liquid inlet (43) of the flash tank (24); the flash tank liquid outlet (44) of the flash tank (24) is connected to the cathode chamber liquid inlet (45) of the cathode chamber (39); and the cathode chamber liquid outlet (46) of the cathode chamber (39) is connected to the capture tower (22).

2. The integrated system for composting tail gas purification and carbon dioxide capture and utilization according to claim 1, characterized in that: An organic amine solution spraying assembly (26) and a liquid storage tank (27) are provided in the capture tower (22); the organic amine solution spraying assembly (26) is connected to a cathode chamber liquid outlet (46) of a cathode chamber (39), and the liquid storage tank (27) is connected to an anode chamber liquid inlet (40) of an anode chamber (38).

3. The integrated system for composting tail gas purification and carbon dioxide capture and utilization according to claim 1 or 2, characterized in that: The electrochemical desorption reactor (23) comprises a shell (33), wherein an electrode plate (34) is arranged inside the shell (33), wherein the electrode plate (34) comprises an anode plate and a cathode plate, wherein an ion exchange membrane (35) is arranged between the anode plate and the cathode plate, and the electrode plate (34) is connected to a power source (37).

4. The integrated system for composting tail gas purification and carbon dioxide capture and utilization according to claim 3 is characterized in that: The flash tank gas outlet (47) of the flash tank (24) is connected to a gas storage tank (25), and the gas storage tank (25) is connected to the gas fertilizer application module (4).

5. The integrated system for composting tail gas purification and carbon dioxide capture and utilization according to claim 1 or 4, characterized in that: The gas fertilizer application module (4) comprises an air distribution pipeline (50) arranged inside the greenhouse planting shed (52), and the air inlet end of the air distribution pipeline (50) is connected to the air outlet of the air storage tank (25).

6. The integrated system for composting tail gas purification and carbon dioxide capture and utilization according to claim 5, characterized in that: A carbon dioxide concentration sensor (51) is provided in the greenhouse planting shed (52), and an electric control valve (49) is provided on the air distribution pipeline (50). The electric control valve (49) and the carbon dioxide concentration sensor (51) are both connected to the air distribution controller (48).

7. The integrated system for composting tail gas purification and carbon dioxide capture and utilization according to claim 1, 4 or 6, characterized in that: The tail gas purification module (2) comprises a washing tower shell (5), wherein a demister (6), a deodorizing spray assembly (7), a deodorizing filter assembly (8), a sewage filter assembly (10) and a circulating water tank (11) are arranged in sequence from top to bottom in the washing tower shell (5), wherein the circulating water tank (11) is connected to the deodorizing spray assembly (7) via a circulating water pump (12), wherein a washing tower air inlet (9) is arranged on the washing tower shell (5), wherein the washing tower air inlet (9) is located at the lower side of the deodorizing filter assembly (8), and wherein the circulating water tank (11) is connected to a water replenishment and dosing system (21).

8. The integrated system for composting tail gas purification and carbon dioxide capture and utilization according to claim 7, characterized in that: The deodorizing filter material assembly (8) comprises a first supporting baffle (15) arranged on the upper part of the washing tower shell (5); the first supporting baffle (15) is located on the upper side of the washing tower air inlet (9); and a first filtering filler (14) is laid on the first supporting baffle (15).

9. The integrated system for composting tail gas purification and carbon dioxide capture and utilization according to claim 8, characterized in that: The sewage filter assembly (10) comprises a second supporting baffle (20) arranged at the lower part of the washing tower shell (5), and a second filter filler (18) and a third filter filler (19) are laid on the second supporting baffle (20).

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