Deodorization device with multi-stage chemical deodorization process

Abstract

The utility model relates to the technical field of deodorization, and discloses a deodorization device with a multi-stage chemical deodorization process, which is characterized in that a plurality of fans are connected together, so that the quantity or the rotating speed of the running fans can be adjusted according to actual requirements, the change of treatment capacity can be flexibly adapted, and the purposes of energy conservation and high-efficiency deodorization can be achieved. The circulating water pump is respectively connected with the acid washing tower and the alkali washing tower, the circulating water pump is used for circulating and intensifying full mixing of odor and washing liquid in the washing towers, and the utilization rate of chemicals can be improved and the water consumption can be reduced by increasing the chemicals in the circulating process; specifically, whether chemicals and water sources need to be added or not is monitored through a pH meter, so that the stability of the deodorization effect is kept; and a detection platform can be arranged, so that an operator can conveniently climb on the detection platform to carry out regular maintenance, and then the problems of blockage, leakage, corrosion and the like possibly occurring in the deodorization device can be timely found and treated, thereby ensuring the operation efficiency of the deodorization device.

Description

Technical Field

[0001] The utility model relates to the technical field of deodorization, in particular to a deodorization device with a multi-stage chemical deodorization process. Background Art

[0002] Many industrial production, sewage, treatment and garbage disposal processes will produce a large amount of malodorous gases. Malodorous gases not only have a serious impact on the ecological environment, but also have great harm to human health, causing central nervous system disorders and lesions, and causing chronic and acute diseases. Pump station odor, pretreatment odor, and sludge treatment odor in urban sewage treatment plants all need to be collected and eliminated. Therefore, in the process of odor treatment, chemical processes are often used to deodorize it.

[0003] Chemical washing methods include physical absorption and chemical absorption. For odor, the characteristics of certain substances in the odor reacting with chemical agents are used. Generally, strong acids and strong bases are selected as washing agents to make gas-liquid contact with the odor molecules in the gas, so that the odor components in the gas phase are transferred to the liquid phase, and the chemical agents and the odor components are neutralized, oxidized or other chemical reactions are used to remove the odor substances. Strong acids (such as H2SO4) are used to remove nitrogen-containing odor components such as ammonia and amines, and strong bases (such as NaOH) and oxidants (such as NaClO) are used to remove sulfur-containing odor components such as H2S and R-SH, so that the treated waste gas meets the emission standards.

[0004] In order to solve the problem of odor deodorization, the industry has conducted relevant research and design. By setting up a water washing tower, an alkali washing tower, an oxidation tower, a biological filter and an emission chimney, the odor is processed in sequence by the water washing tower, the alkali washing tower, the oxidation tower, the biological filter and the emission chimney to achieve thorough deodorization. For example, an acid and alkali chemical washing integrated deodorization device (CN210544330U) integrates the acid tower, the alkali tower and the exhaust chimney into one device. The acid washing liquid spray pipe on the top of the deodorization tower sprays the acid washing liquid down. When the liquid passes through the corrugated plate, a relatively stable liquid film absorption layer is formed. When the gas passes through the corrugated plate, it can fully contact with the acid washing liquid, which is conducive to strengthening the gas-liquid downstream contact process and solving the problem of insufficient exchange between gas and liquid in the downstream process of the filler.

[0005] However, the above-mentioned prior art simply connects the fan to the deodorization tower, which may cause the odor molecules of the odor to be difficult to capture and treat, resulting in unstable deodorization effect, low deodorization capacity and other deficiencies, which may lead to insufficient odor treatment and easily cause environmental pollution; the method of spraying acid and alkali may make it difficult for the odor molecules of the odor to be captured and treated by acid and alkali, resulting in poor deodorization effect. Utility Model Content

[0006] The utility model is to overcome the technical problems existing in the prior art and is a deodorizing device with a multi-stage chemical deodorizing process.

[0007] In order to solve the above technical problems, the technical solution of the utility model is as follows:

[0008] A deodorization device with a multi-stage chemical deodorization process, comprising a plurality of groups of centrifugal fans, an acid washing tower, an alkali washing tower, a biological deodorization tank and a discharge tower; the centrifugal fan is connected to the bottom of the acid washing tower through a pipeline, the top of the acid washing tower is connected to the bottom of the alkali washing tower through a pipeline, the top of the alkali washing tower is connected to the biological deodorization tank through a pipeline, and the biological deodorization tank is connected to the discharge tower through a pipeline;

[0009] The acid washing tower and the alkali washing tower are both connected to a circulating water pump for circulating chemical agents.

[0010] Preferably, a protection box for protecting against rain and sun is also provided on the outside of the centrifugal fan.

[0011] Furthermore, the acid washing tower is connected to an acid chemical water pump through a pipeline, and the acid chemical water pump is also connected to an acid chemical agent and a pure water source; the alkali washing tower is connected to an alkali chemical water pump through a pipeline, and the alkali chemical water pump is also connected to an alkali chemical agent and a pure water source; the inside of the washing tower is sprayed to fully mix the odor and the washing liquid.

[0012] Furthermore, the air inlets of the centrifugal fans are all connected to the air inlet branch pipes, and the air outlets of several groups of centrifugal fans are gathered through the air outlet main pipe and connected to the acid washing tower.

[0013] Furthermore, the air outlets of several groups of centrifugal fans (1) are connected in parallel or / and in series to the air outlet main pipe (11), and finally converge and communicate with the acid washing tower (2).

[0014] Furthermore, the biological deodorization tank is sealed, a filler inspection door is provided on the side of the biological deodorization tank, and a top cover inspection door is provided on the top of the biological deodorization tank;

[0015] A transparent protective cover for viewing the differential pressure gauge is also provided on the wall of the biological deodorization tank.

[0016] Preferably, the packing inspection door is arranged on the packing side of the biological deodorization tank.

[0017] Furthermore, a pre-washing tank for washing chemical gases is provided between the alkaline washing tower and the biological deodorization tank.

[0018] Preferably, a packing inspection door is also provided on the side of the pre-wash tank, and a top cover inspection door is also provided on the top of the pre-wash tank; the packing inspection door is arranged on one side of the packing of the pre-wash tank.

[0019] Furthermore, a biological detection platform is provided on the top of the biological deodorization tank, and the biological detection platform is connected to the ground through a ladder.

[0020] Furthermore, the emission tower is provided with a detection port, and the emission tower is also provided with a gas detection platform for detecting the emission gas, and the gas detection platform is also connected to the biological detection platform through a ladder.

[0021] Preferably, a rainproof cap is also provided on the top of the discharge tower.

[0022] Furthermore, a demister for removing chemical water mist is provided at the connection between the top of the acid washing tower and the alkali washing tower and the pipeline.

[0023] Furthermore, an air duct support is also provided on the pipeline connecting the top of the acid washing tower and the top of the alkali washing tower.

[0024] Preferably, the steps are made of alloy material.

[0025] Compared with the prior art, the beneficial effects of the technical solution of the utility model are:

[0026] ① Set up several groups of centrifugal fans to converge and connect to the chemical scrubber to effectively improve the deodorization capacity;

[0027] Since the odor will produce a certain pressure loss during the gas-liquid contact and chemical reaction inside the chemical scrubbing tower, using multiple fans in parallel or series can adjust the fan output according to the pressure conditions in the tower, maintain a stable gas flow rate, ensure the smooth progress of the chemical scrubbing process, and ensure that the deodorization task can be completed efficiently even when the gas emission is large.

[0028] ② Connect the chemical scrubber to the circulating water pump to maintain the pH value of the scrubber;

[0029] Since the circulating liquid of the chemical scrubber can be recycled and reused in the washing process for odor elimination, instead of being discharged after a one-time use, the circulating water pump is connected to the acid scrubber and the alkaline scrubber respectively. The spray design inside the scrubber can fully mix the gas and the scrubbing liquid. During the circulation process, the utilization rate of the agent can be increased by adding the agent and the water consumption can be reduced. Specifically, the pH meter is used to monitor whether the agent and water source need to be added, so as to maintain the stability of the deodorization effect.

[0030] ③ Set up a testing platform to facilitate the inspection and maintenance of the deodorization device;

[0031] There are inspection platforms on the biological deodorization tank and the emission tower, which are convenient for operators to climb up to the inspection platform for regular maintenance; regular maintenance can timely discover and solve problems such as blockage, leakage, corrosion, etc. that may occur in the biological deodorization tank and the emission tower, ensure their operating efficiency, and maintain stable deodorization performance. This includes cleaning the sediment on the biological filler, checking whether the spraying device is working properly, etc., to ensure that the exhaust gas emissions meet the standards and avoid fines or legal risks due to illegal emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the implementation mode will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 It is a front view of a deodorization device having a multi-stage chemical deodorization process;

[0034] Figure 2 A side view of a deodorization device having a multi-stage chemical deodorization process;

[0035] Figure 3 A top view of a deodorization device having a multi-stage chemical deodorization process;

[0036] Figure 4 This is an enlarged schematic diagram of part A.

[0037] Among them, 1. Centrifugal fan; 2. Acid washing tower; 3. Alkali washing tower; 4. Biological deodorization tank; 401. Filler inspection door; 402. Top cover inspection door; 403. Biological detection platform; 5. Discharge tower; 501. Gas detection platform; 6. Acid chemical water pump; 7. Acid chemical agent; 8. Alkali chemical water pump; 9. Alkali chemical agent; 10. Air inlet branch pipe; 11. Air outlet main pipe; 12. Defogger; 13. Duct bracket; 14. Pre-wash tank; 15. Pre-wash filler; 16. Biological filler. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the present application will be clearly and completely described below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the described embodiments, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. "First", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0040] Example 1

[0041] like Figure 1-4 As shown, this embodiment discloses a deodorization device with a multi-stage chemical deodorization process, including a plurality of groups of centrifugal fans 1, an acid washing tower 2, an alkali washing tower 3, a biological deodorization tank 4 and a discharge tower 5; the centrifugal fan 1 is connected to the bottom of the acid washing tower 2 through a pipeline, the top of the acid washing tower 2 is connected to the bottom of the alkali washing tower 3 through a pipeline, the top of the alkali washing tower 3 is connected to the biological deodorization tank 4 through a pipeline, and the biological deodorization tank 4 is connected to the discharge tower 5 through a pipeline;

[0042] The acid washing tower 2 and the alkali washing tower 3 are both connected to a circulating water pump for circulating chemical agents.

[0043] Since the production load of the factory may vary in different production periods, during the peak production period, in order to meet market demand, the production line often runs at full speed, and the amount of raw materials used, energy consumption and by-products (including odor) generated will increase accordingly; while during the off-peak period, production activities are reduced and odor emissions also decrease;

[0044] Therefore, the amount of odor emissions will vary in different production periods. Sometimes high-load deodorization is required, and sometimes low-load deodorization is required. By connecting multiple fans together, the number or speed of running fans can be adjusted according to actual needs, flexibly adapting to changes in processing volume, achieving the purpose of energy saving and efficient deodorization;

[0045] The circulating water pump is also connected to the acid washing tower 2 and the alkali washing tower 3 respectively. The circulating water pump is used to circulate and strengthen the odor in the washing tower and fully mix the washing liquid. In the circulation process, the utilization rate of the agent can be increased and the water consumption can be reduced by adding the agent. Specifically, the pH meter is used to monitor whether the agent and water source need to be added, so as to maintain the stability of the deodorization effect.

[0046] An inspection platform can also be set up to facilitate operators to climb up to the inspection platform for regular maintenance, so as to promptly discover and deal with problems such as blockage, leakage, corrosion, etc. that may occur in the deodorization device, thereby ensuring the operating efficiency of the deodorization device.

[0047] Preferably, a rain cap is also provided on the top of the emission tower 5; since rainwater contains acidic substances, the rain cap can effectively prevent rainwater from directly entering the chimney of the emission tower 5, avoiding rainwater from diluting the emission gas and affecting the emission effect, while also preventing rainwater from eroding or corroding the internal structure of the chimney of the emission tower 5.

[0048] As a specific implementation method, the acid washing tower 2 is connected to the acid chemical water pump 6 through a pipeline, and the acid chemical water pump 6 is also connected to the acid chemical agent 7 and a pure water source; the alkali washing tower 3 is connected to the alkali chemical water pump 8 through a pipeline, and the alkali chemical water pump 8 is also connected to the alkali chemical agent 9 and a pure water source; the inside of the washing tower is sprayed to fully mix the odor and the washing liquid.

[0049] Specifically, the acid chemical water pump 6 and the alkali chemical water pump 8 are submersible pumps and are arranged in a water tank, and the working parts of the submersible pumps are submerged in the liquid in the water tank.

[0050] Specifically, the acid chemical water pump 6 mixes the acid chemical agent 7 and the pure water source and then passes them into the acid washing tower 2; the pH value of the liquid in the washing tower can be maintained by the accurately proportioned acid solution, and harmful gases in the odor, such as alkaline gases such as ammonia, can be removed, ensuring that the solution transported to the acid washing tower 2 has an accurate acid concentration, thereby ensuring the treatment effect, reducing resource waste, and controlling treatment costs;

[0051] The acid chemical water pump 6 is also connected to the acid washing tower 2, so that the spray design inside the acid washing tower 2 can fully mix the odor with the acid washing liquid. The circulating acid washing through the acid chemical water pump 6 can capture and treat more odor molecules. In the circulation process, the utilization rate of the agent can be improved by increasing the agent and the water consumption can be reduced, thereby achieving the purpose of energy saving.

[0052] Specifically, the alkaline chemical water pump 8 mixes the alkaline chemical agent 9 and the pure water source and then passes them into the alkaline washing tower 3; the pH value of the liquid in the washing tower can be maintained by the alkaline solution with a precise ratio, and the acidic gas brought by the odor in the acid washing tower 2 can be neutralized, removed and purified, and harmful gases such as hydrogen sulfide in the odor can also be reacted to convert them into harmless or easy-to-handle salts, thereby reducing environmental pollution;

[0053] The alkaline chemical water pump 8 is also connected to the alkaline washing tower 3, so that the spray design inside the alkaline washing tower 3 can fully mix the odor with the alkaline washing liquid. The alkaline washing liquid circulated by the alkaline chemical water pump 8 can capture and process more odor molecules (such as sulfur dioxide, hydrogen sulfide, etc.), thereby maintaining the stability of the deodorization effect, and can also help maintain the chemical stability of the circulating liquid, ensuring the continuous and efficient operation of the circulation system.

[0054] As a specific implementation manner, the air inlets of the centrifugal fans 1 are all connected to the air inlet branch pipe 10 , and the air outlets of several groups of centrifugal fans 1 are gathered through the air outlet main pipe 11 and connected to the acid washing tower 2 .

[0055] Due to the gas-liquid contact and chemical reaction inside the chemical scrubber, a certain pressure loss will occur;

[0056] Specifically, the air outlets of several groups of centrifugal fans 1 are connected in parallel or / and in series to the air outlet main pipe 11 , and finally converge and communicate with the acid washing tower 2 .

[0057] Specifically, a plurality of groups of centrifugal fans 1 are provided according to the odor distribution positions, and the air outlet pipes 11 of the plurality of groups of fans are connected in parallel or in series. The centrifugal fans 1 of the same group transport the odor through the air inlet branch pipe 10, and then the odor is gathered into the chemical washing tower through the air outlet pipe 11 for deodorization. When working, the fan output can be adjusted according to the pressure conditions in the tower to maintain a stable gas flow rate, thereby ensuring the smooth progress of the washing process in the chemical washing tower and ensuring that the deodorization task can be efficiently completed even when the gas emission is large. It can also reduce the access points of the chemical washing tower, help optimize space utilization, reduce the complexity and length of the pipeline, and thus reduce costs.

[0058] Example 2

[0059] like Figure 1-4 As shown, this embodiment discloses a deodorization device with a multi-stage chemical deodorization process, including a plurality of groups of centrifugal fans 1, an acid washing tower 2, an alkali washing tower 3, a biological deodorization tank 4 and a discharge tower 5; the centrifugal fan 1 is connected to the bottom of the acid washing tower 2 through a pipeline, the top of the acid washing tower 2 is connected to the bottom of the alkali washing tower 3 through a pipeline, the top of the alkali washing tower 3 is connected to the biological deodorization tank 4 through a pipeline, and the biological deodorization tank 4 is connected to the discharge tower 5 through a pipeline;

[0060] The acid washing tower 2 and the alkali washing tower 3 are both connected to a circulating water pump for circulating chemical agents.

[0061] As a specific implementation, the biological deodorization tank 4 is sealed, a filler inspection door 401 is provided on the side of the biological deodorization tank 4, and a top cover inspection door 402 is provided on the top of the biological deodorization tank 4;

[0062] A biological detection platform 403 is also provided on the top of the biological deodorization tank 4, and the biological detection platform 403 is connected to the ground through a ladder;

[0063] The emission tower 5 is also provided with a detection port, and the emission tower 5 is also provided with a gas detection platform 501 for detecting the emission gas. The gas detection platform 501 is also connected to the biological detection platform 403 through a ladder.

[0064] Specifically, a biological detection platform 403 and a gas detection platform 501 are provided on the biological deodorization tank 4 and the emission tower 5. The biological detection platform 403 is connected to the ground via stairs, and the gas detection platform 501 is connected to the biological detection platform 403 via stairs, so that inspectors can conveniently climb up the biological detection platform 403 for regular maintenance, and can promptly discover and solve problems such as blockage, leakage, corrosion, etc. that may occur in the biological deodorization tank, thereby cleaning the sediment on the biological filler 16, avoiding production suspension or environmental pollution incidents caused by sudden failures, and reducing economic losses and environmental risks.

[0065] Inspectors can also climb onto the gas detection platform 501 to conduct regular inspections to ensure that the biological deodorization system always meets national or local environmental emission standards. By using detection tools to monitor the composition and concentration of the gas emitted by the gas detection platform 501, the deodorization effect can be verified to ensure that waste gas emissions meet standards and avoid fines or legal risks due to illegal emissions.

[0066] Example 3

[0067] like Figure 1-4 As shown, this embodiment discloses a deodorization device with a multi-stage chemical deodorization process, including a plurality of groups of centrifugal fans 1, an acid washing tower 2, an alkali washing tower 3, a biological deodorization tank 4 and a discharge tower 5; the centrifugal fan 1 is connected to the bottom of the acid washing tower 2 through a pipeline, the top of the acid washing tower 2 is connected to the bottom of the alkali washing tower 3 through a pipeline, the top of the alkali washing tower 3 is connected to the biological deodorization tank 4 through a pipeline, and the biological deodorization tank 4 is connected to the discharge tower 5 through a pipeline;

[0068] The acid washing tower 2 and the alkali washing tower 3 are both connected to a circulating water pump for circulating chemical agents.

[0069] As a specific implementation, a differential pressure gauge is further provided inside the biological deodorization tank 4, and a transparent protective cover for viewing the differential pressure gauge is further provided on the wall of the biological deodorization tank 4.

[0070] As the biological filler 16 in the biological deodorization tank 4 increases in use time, resistance may gradually increase due to the growth of microorganisms, accumulation of organic matter or clogging of dust particles, resulting in an increase in the pressure difference of the filter layer.

[0071] Specifically, the differential pressure meter can monitor this change in real time. When the differential pressure reaches a certain threshold, it prompts the operator to perform maintenance operations such as backwashing, replacement or replenishment of fillers to restore the normal working efficiency of the biological deodorization tank 4.

[0072] As a specific implementation, a pre-washing tank 14 for washing chemical gases is provided between the alkaline washing tower 3 and the biological deodorization tank 4 .

[0073] Odor may carry chemical gases when coming out of the alkaline scrubber 3. The pre-wash tank 14 can firstly perform preliminary water washing on the gas coming out of the alkaline scrubber 3 to remove harmful chemical gases that are easily soluble in water, reduce direct impact on microorganisms in the biological deodorization tank 4, and protect the living environment of microorganisms.

[0074] Specifically, a packing inspection door is also provided on the side of the pre-wash tank 14, and a top cover inspection door is also provided on the top of the pre-wash tank 14; the packing inspection door is arranged on one side of the pre-washing packing 15 of the pre-wash tank 14;

[0075] Since the pre-washing filler 15 may accumulate impurities, age or be damaged over time, thus affecting the pre-washing effect, the inspection door provided on one side of the pre-washing filler 15 allows the staff to directly access the filler layer, conduct regular inspections, clean or replace the filler when necessary, and maintain the pre-washing efficiency;

[0076] The top of the pre-wash tank 14 may be equipped with a spray device, a gas distributor and other equipment. The top cover inspection door is convenient for checking, cleaning or repairing these equipment to ensure uniform spraying and reasonable gas distribution, thereby improving the pre-washing effect.

[0077] As a specific implementation, a demister 12 for removing chemical water mist is also provided at the top of the acid washing tower 2 and the alkali washing tower 3 where the top is connected to the pipeline;

[0078] Specifically, since the fine water mist from the acid scrubber 2 and the alkali scrubber 3 may carry corrosive chemical droplets, the mist eliminator 12 can remove the fine water mist. The use of the mist eliminator 12 can reduce the direct impact of the corrosive chemical droplets on the microorganisms in the biological deodorization tank 4, thereby protecting the living environment of the microorganisms.

[0079] As a specific implementation, an air duct support 13 is also provided on the pipe connecting the top of the acid washing tower 2 and the alkali washing tower 3;

[0080] Specifically, the air duct support 13 can provide necessary physical support for the pipeline, ensure that the pipeline remains stable under gravity, internal pressure and possible wind load, and prevent the pipeline from deforming or falling off.

[0081] How it works

[0082] Since the production load of the factory may vary in different production periods, during the peak production period, in order to meet market demand, the production line often runs at full speed, and the amount of raw materials used, energy consumption and by-products (including odor) generated will increase accordingly; while during the off-peak period, production activities are reduced and odor emissions also decrease;

[0083] Therefore, the amount of odor emissions will vary in different production periods. Sometimes high-load deodorization is required, and sometimes low-load deodorization is required. By connecting multiple fans together, the number or speed of running fans can be adjusted according to actual needs, flexibly adapting to changes in processing volume, achieving the purpose of energy saving and efficient deodorization;

[0084] The circulating water pump is also connected to the acid washing tower 2 and the alkali washing tower 3 respectively. The circulating water pump is used to circulate and strengthen the odor in the washing tower and fully mix the washing liquid. In the circulation process, the utilization rate of the agent can be increased and the water consumption can be reduced by adding the agent. Specifically, the pH meter is used to monitor whether the agent and water source need to be added, so as to maintain the stability of the deodorization effect.

[0085] An inspection platform can also be set up to facilitate operators to climb up to the inspection platform for regular maintenance, so as to promptly discover and deal with problems such as blockage, leakage, corrosion, etc. that may occur in the deodorization device, thereby ensuring the operating efficiency of the deodorization device.

[0086] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A deodorizing device with a multi-stage chemical deodorizing process, characterized in that: The invention comprises a plurality of groups of centrifugal fans (1), an acid washing tower (2), an alkali washing tower (3), a biological deodorization tank (4) and a discharge tower (5); the centrifugal fans (1) are connected to the bottom of the acid washing tower (2) through a pipeline, the top of the acid washing tower (2) is connected to the bottom of the alkali washing tower (3) through a pipeline, the top of the alkali washing tower (3) is connected to the biological deodorization tank (4) through a pipeline, and the biological deodorization tank (4) is connected to the discharge tower (5) through a pipeline; The acid washing tower (2) and the alkali washing tower (3) are both connected to a circulating water pump for circulating chemical agents.

2. The deodorizing device with a multi-stage chemical deodorizing process according to claim 1, characterized in that: The acid washing tower (2) is connected to an acid chemical water pump (6) through a pipeline, and the acid chemical water pump (6) is also connected to an acid chemical agent (7) and a pure water source; the alkali washing tower (3) is connected to an alkali chemical water pump (8) through a pipeline, and the alkali chemical water pump (8) is also connected to an alkali chemical agent (9) and a pure water source; the inside of the washing tower is sprayed to fully mix the odor and the washing liquid.

3. The deodorizing device with a multi-stage chemical deodorizing process according to claim 1, characterized in that: The air inlets of the centrifugal fans (1) are all connected to the air inlet branch pipe (10), and the air outlets of several groups of centrifugal fans (1) are gathered through the air outlet main pipe (11) and connected to the acid washing tower (2).

4. The deodorizing device with a multi-stage chemical deodorizing process according to claim 3, characterized in that: The air outlets of a plurality of groups of centrifugal fans (1) are connected in parallel or / and in series to an air outlet main pipe (11), and finally converge and communicate with the acid washing tower (2).

5. The deodorizing device with a multi-stage chemical deodorizing process according to claim 1, characterized in that: The biological deodorization tank (4) is sealed, a filler inspection door (401) is provided on the side of the biological deodorization tank (4), and a top cover inspection door (402) is provided on the top of the biological deodorization tank (4); A differential pressure gauge is also provided inside the biological deodorization tank (4), and a transparent protective cover for viewing the differential pressure gauge is also provided on the wall of the biological deodorization tank (4).

6. The deodorizing device with a multi-stage chemical deodorizing process according to claim 1, characterized in that: A pre-washing tank (14) for washing chemical gases is also provided between the alkali washing tower (3) and the biological deodorization tank (4).

7. The deodorizing device with a multi-stage chemical deodorizing process according to claim 1, characterized in that: A biological detection platform (403) is also provided on the top of the biological deodorization tank (4), and the biological detection platform (403) is connected to the ground via a ladder.

8. The deodorizing device with a multi-stage chemical deodorizing process according to claim 7, characterized in that: The emission tower (5) is also provided with a detection port, and the emission tower (5) is also provided with a gas detection platform (501) for detecting emission gas, and the gas detection platform (501) is also connected to the biological detection platform (403) via a ladder.

9. The deodorizing device with a multi-stage chemical deodorizing process according to claim 1, characterized in that: A demister (12) for removing chemical water mist is also provided at the connection point between the top of the acid washing tower (2) and the alkali washing tower (3) and the pipeline.

10. The deodorizing device with a multi-stage chemical deodorizing process according to claim 1, characterized in that: An air duct support (13) is also provided on the pipeline connecting the tops of the acid washing tower (2) and the alkali washing tower (3).

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