Acidic gas removing device

Abstract

The utility model aims to provide a sour gas removal device. The sour gas removal device comprises a tank body, a gas conveying unit, an immersion deodorization packing layer, a spraying exchange type deodorization unit and a water and dust removal packing layer, the space in the tank body is divided into a bottom layer, a middle layer and a top layer from bottom to top; an immersion contact type deodorization unit is arranged in the bottom layer, an immersion deodorization filler layer is arranged in the bottom layer, the bottom layer is filled with deodorization liquid, the immersion deodorization filler layer is immersed below the liquid level, a plurality of groups of microbubble generators are arranged below the immersion contact type deodorization unit, and each group of microbubble generators are connected with a gas conveying unit through gas inlet branch pipes; a spraying exchange type deodorization unit is arranged at the upper part in the middle layer, and a spraying filler layer is arranged below the spraying exchange type deodorization unit; a water and dust removal packing layer is arranged in the top layer; an air outlet is formed in the top end of the tank body. The device disclosed by the utility model has the advantages of compact structure, small occupied area, high deodorization efficiency, convenience in operation, low maintenance cost, wide applicability and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of harmless waste gas treatment, in particular to a device for removing sour and smelly gases. Background Art

[0002] In order to reduce air pollution, some places that produce sour and smelly gases often need to install gas treatment equipment to treat the waste gas harmlessly so as to meet the gas emission standards. Existing gas treatment devices are mostly activated carbon adsorption, packed tower absorption, biological filter, etc., but when dealing with high-concentration sour and smelly gases, these devices often have poor treatment effects. This is mainly because the water and organic acids contained in high-concentration sour and smelly gases are easily combined with activated carbon, thereby reducing the adsorption effect. On the other hand, traditional packed tower absorption or biological filter is difficult to quickly and efficiently react with multiple sour and smelly gases simultaneously, and the absorption liquid will slowly become ineffective, and the environmental conditions of the biological filter are difficult to maintain, making it impossible to continuously and effectively remove sour and smelly gases. Therefore, at this stage, there is an urgent need for a deodorization technology with high deodorization efficiency to solve the problem that sour and smelly gases cannot be removed efficiently and continuously. Summary of the Invention

[0003] The utility model aims to provide a device for removing sour and smelly gases, which has the advantages of compact structure, small footprint, high deodorization efficiency, convenient operation, low maintenance cost, wide applicability, and the like.

[0004] The acid and odor gas removal device comprises a tank body, a gas delivery unit, an immersion deodorizing filler layer, a spray exchange deodorizing unit, and a water and dust removing filler layer;

[0005] The space inside the tank body is divided into a bottom layer, a middle layer and a top layer from bottom to top; an immersion deodorizing filler layer is provided in the bottom layer, the bottom layer is filled with deodorizing liquid, and the immersion deodorizing filler layer is immersed below the liquid surface; a plurality of groups of microbubble generators are provided below the immersion contact deodorizing unit, and each group of microbubble generators is connected to the gas delivery unit through an air inlet branch pipe; a spray exchange deodorizing unit is provided in the upper part of the middle layer, and a spray filler layer is provided below the spray exchange deodorizing unit; a water and dust removal filler layer is provided in the top layer; and an air outlet is provided at the top of the tank body.

[0006] The bottom layer and the middle layer, and the middle layer and the top layer are separated by baffles I with through holes respectively. A baffle II with through holes is arranged in the middle of the bottom layer, and an immersed deodorizing filler layer is arranged thereon.

[0007] A plurality of ventilation holes are evenly arranged on the baffle plate I with through holes and the baffle plate II with through holes.

[0008] The gas delivery unit includes a fan, a main pipe, an air intake branch pipe, and a branch pipe solenoid valve; the fan is arranged outside the tank body and connected to multiple groups of air intake branch pipes through the main pipe, and each group of air intake branch pipes is respectively provided with a branch pipe solenoid valve.

[0009] The specific surface area of ​​the submerged deodorizing filler layer is 50-1000 m 2 / m 3 The specific surface area of ​​the spray packing layer is 50-500 m 2 / m 3 .

[0010] The spray exchange deodorizing unit includes a spray pipeline and a spray head;

[0011] The spray pipes are arranged in a mesh shape and are arranged on the upper part of the middle layer, and a plurality of vertically downward spray heads are evenly spaced on the spray pipes;

[0012] The deodorizing liquid extraction mechanism extracts the deodorizing liquid from the bottom layer and transports it into the spray pipeline.

[0013] The deodorizing liquid extraction mechanism includes an extraction pump, an extraction pipe, and a liquid delivery pipe. The inlet of the extraction pump is connected to the lower part of the bottom layer through the extraction pipe, and the outlet of the extraction pump is connected to the spray pipeline through the liquid delivery pipe. The liquid delivery pipe is provided with a water circulation flow meter and a water circulation solenoid valve.

[0014] The acid and odor gas removal device also includes a control device, a pH sensor, a liquid level sensor, a deodorizing liquid temporary storage tank, a delivery pump, a delivery pipeline I, a delivery pipeline II, a drain pipe, and a drain solenoid valve;

[0015] The inlet of the delivery pump is connected to the delivery pipeline I, and the end of the delivery pipeline I extends into the lower part of the deodorizing liquid temporary storage tank; the outlet of the delivery pump is connected to the delivery pipeline II, and the end of the delivery pipeline II extends into the middle part of the bottom layer;

[0016] The detection ends of the pH sensor and the liquid level sensor are both arranged in the bottom layer, and are used to detect the pH and liquid level of the disinfectant in the bottom layer; a drainage pipe is provided at the bottom of the bottom layer, and a drainage solenoid valve is provided on the drainage pipe;

[0017] The delivery pipeline II is provided with a delivery solenoid valve and a delivery flow meter at intervals;

[0018] The pH sensor, liquid level sensor, delivery pump, and discharge solenoid valve are all electrically connected to the control device, and the control device is equipped with upper and lower pH thresholds, upper and lower liquid level thresholds, and a liquid level reference value;

[0019] When the pH sensor transmits the detected pH to the control device in real time, when the detected pH is lower than the lower limit value, the control device controls the delivery pump to start, replenishes disinfectant into the bottom layer, and at the same time controls the drain solenoid valve to open and drain; the liquid level sensor transmits the detected real-time liquid level to the control device. When the real-time liquid level is lower than the lower limit value, the control device controls the drain solenoid valve to close until the liquid level reaches the liquid level reference value, and reopens the drain solenoid valve. When the real-time liquid level is higher than the lower limit value, the control device controls the delivery pump to close until the liquid level reaches the liquid level reference value; finally, when the detected pH reaches the upper limit value, the control device controls the delivery pump to stop working and the drain solenoid valve to close.

[0020] The deodorizing liquid temporary storage tank is provided with a temperature control system to control the temperature of the deodorizing liquid therein to a set value;

[0021] The temperature sensor is electrically connected to the control device. The detection end of the temperature sensor is arranged in the bottom layer to measure the temperature of the disinfectant in the bottom layer. The upper and lower temperature limits are preset in the control device. When the temperature exceeds the upper limit, the discharge solenoid valve is controlled to open for discharge, and the delivery pump is controlled to start delivering liquid at the same time, thereby lowering the temperature of the disinfectant in the bottom layer until it reaches the preset value I; when the temperature is lower than the lower limit, the control device controls the delivery pump to start delivering liquid, thereby raising the temperature of the disinfectant in the bottom layer until it reaches the preset value II.

[0022] The filler of the water-dust removal filler layer is activated carbon; the diameter of the micro-nano bubbles formed by the microbubble generator is 0.1nm-950um.

[0023] The control device in the present invention can adopt PLC, for example: Siemens s7-200smart;

[0024] The liquid level sensor can adopt a general device of existing technology, such as model EP-C3;

[0025] The liquid level sensor may be a general device of existing technology, for example, the pH and temperature probes are integrated electrode probes, model LH-DG150.

[0026] The working process of this utility model is as follows:

[0027] In 100 m 2 The concentration of sour and odorous gas in the space is about 1-30 mg / m 3 For example, the gas is drawn into the air inlet branch through a fan, and the branch solenoid valve on the air inlet branch is opened. The microbubble generator generates microbubbles of about 1nm-10um from the incoming gas, and the sour and odorous gas is released from the bottom of the bottom layer and enters the submerged deodorizing packing layer. The microbubbles of the sour and odorous gas pass through the baffle plate II with through holes and fully contact with the deodorizing liquid in the submerged deodorizing packing layer. The specific surface area of ​​the submerged packing in the submerged deodorizing packing layer is about 200 m 2 / m 3 .

[0028] Subsequently, the unreacted acidic and smelly gas microbubbles enter the middle layer through the baffle plate I with through holes and fully contact with the spray packing layer. The specific surface area of ​​the spray packing layer is 80 m 2 / m 3 The extraction pump extracts the deodorizing liquid from the bottom layer, and the deodorizing liquid enters the spray pipeline and is sprayed from the spray head onto the spray filler layer, where it continuously contacts and reacts with the acid and odorous gas microbubbles.

[0029] When the pH sensor transmits the detected pH to the control device in real time, when the detected pH is lower than the lower limit value of 6.5, the control device controls the delivery pump to start, replenishes disinfectant into the bottom layer, and at the same time controls the drain solenoid valve to open and drain; the liquid level sensor transmits the detected real-time liquid level to the control device. When the real-time liquid level is lower than the lower limit value, the control device controls the drain solenoid valve to close until the liquid level reaches the liquid level reference value, and reopens the drain solenoid valve. When the real-time liquid level is higher than the lower limit value, the control device controls the delivery pump to close until the liquid level reaches the liquid level reference value; finally, when the detected pH reaches the upper limit value of 7.5, the control device controls the delivery pump to stop working and the drain solenoid valve to close.

[0030] The deodorizing liquid temporary storage tank is provided with a temperature control system to control the temperature of the deodorizing liquid therein to a set value of 30°C;

[0031] When the temperature exceeds the upper limit of 60°C, the drain solenoid valve is controlled to open for draining, and at the same time, the delivery pump is controlled to open for delivery, thereby lowering the temperature of the disinfectant in the bottom layer until the temperature in the bottom layer is lower than 40°C; when the temperature is lower than the lower limit of 5°C, the control device controls the delivery pump to open for delivery, thereby raising the temperature of the disinfectant in the bottom layer until the temperature in the bottom layer is higher than 20°C.

[0032] The deodorization efficiency of the sour and odorous gas in the immersed deodorizing packing layer is about 70-98%, and the deodorization efficiency in the spraying packing layer is 85-99%. After the automatic sour and odorous gas removal device of the utility model is used, the sour and odorous gas concentration in the original space can be reduced to 0.01mg / m 3 , the deodorizing effect is obvious.

[0033] The beneficial effects of the utility model are:

[0034] The device of the utility model is mainly used to remove acid and odorous gases generated in the processes of sewage treatment, sludge treatment, and resource utilization of organic waste. The high-concentration acid and odorous gases in the space pass through the immersion contact deodorization unit and the spray exchange deodorization unit, which can achieve rapid and efficient complete reaction, high treatment efficiency and good effect.

[0035] The device of the utility model adopts an integrated design from top to bottom, and the water-dust removal filler layer on the top layer can effectively remove residual water vapor in the gas, thereby ensuring the dryness of the discharged gas.

[0036] The device of the utility model has the advantages of compact structure, small footprint, high deodorizing efficiency, convenient operation, low maintenance cost, wide applicability, and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 Schematic diagram of the structure of the acid and odor gas removal device of Example 1;

[0038] The serial numbers and names in the figure are as follows:

[0039] 1-tank body, 2-immersed deodorizing packing layer, 3-water and dust removing packing layer, 4-bottom layer, 5-middle layer, 6-top layer, 7-microbubble generator, 8-air inlet branch pipe, 9-spraying packing layer, 10-air outlet, 11-baffle I with through hole, 12-fan, 13-main pipe, 14-branch pipe solenoid valve, 15-spraying pipeline, 16-spraying head, 17-extraction pump, 18-extraction pipe, 19-liquid delivery pipe, 20-water circulation flowmeter, 21-water circulation solenoid valve, 22-control device, 23-pH sensor, 24-liquid level sensor, 25-deodorizing liquid temporary storage tank, 26-delivery pump, 27-delivery pipeline I, 28-delivery pipeline II, 29-drainage pipe, 30-drainage solenoid valve, 31-temperature sensor, 32-baffle II with through hole, 33-delivery solenoid valve, 34-delivery flowmeter. DETAILED DESCRIPTION

[0040] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. Example 1

[0041] like Figure 1 As shown, the acid and odor gas removal device includes a tank body 1, a gas delivery unit, an immersion deodorizing packing layer 2, a spray exchange deodorizing unit, and a water and dust removing packing layer 3; the specific surface area of ​​the immersion deodorizing packing layer 2 is 50-1000m 2 / m 3 The specific surface area of ​​the spray packing layer 9 is 50-500 m 2 / m 3 The water and dust removal filler layer 3 is filled with activated carbon;

[0042] The space inside the tank body 1 is divided into a bottom layer 4, a middle layer 5, and a top layer 6 from bottom to top; an immersion deodorizing filler layer 2 is provided in the bottom layer 4, the bottom layer 4 is filled with deodorizing liquid, and the immersion deodorizing filler layer 2 is immersed below the liquid surface; a plurality of groups of microbubble generators 7 are provided below the immersion contact deodorizing unit, and the diameter of the micro-nano bubbles formed by the microbubble generator 7 is 0.1nm-950um; each group of microbubble generators 7 is connected to the gas delivery unit through an air inlet branch pipe 8; a spray exchange deodorizing unit is provided in the upper part of the middle layer 5, and a spray filler layer 9 is provided below the spray exchange deodorizing unit; a water and dust removal filler layer 3 is provided in the top layer 6; and an air outlet 10 is provided at the top of the tank body 1.

[0043] The bottom layer 4 and middle layer 5, as well as the middle layer 5 and top layer 6, are separated by perforated baffles I 11. A perforated baffle II 32 is provided in the middle of the bottom layer 4, upon which the submerged deodorizing filler layer 2 is disposed. Multiple ventilation holes are evenly distributed on the perforated baffles I 11 and II 32.

[0044] The gas delivery unit includes a fan 12, a main pipe 13, an air intake branch pipe 8, and a branch pipe solenoid valve 14; the fan 12 is arranged outside the tank body 1, and is connected to multiple groups of air intake branch pipes 8 through the main pipe 13, and each group of air intake branch pipes 8 is respectively provided with a branch pipe solenoid valve 14.

[0045] The spray exchange deodorizing unit includes a spray pipe 15 and a spray head 16. The spray pipe 15 is arranged in a network shape and is arranged on the upper part of the middle layer 5. A plurality of spray heads 16 are evenly spaced and vertically downwardly arranged on the spray pipe 15.

[0046] The deodorizing liquid extraction mechanism extracts the deodorizing liquid from the bottom layer 4 and transports it into the spray pipeline 15 .

[0047] The deodorizing liquid extraction mechanism includes an extraction pump 17, an extraction pipe 18, and a liquid delivery pipe 19. The inlet of the extraction pump 17 is connected to the lower part of the bottom layer 4 through the extraction pipe 18, and the outlet of the extraction pump 17 is connected to the spray pipe 15 through the liquid delivery pipe 19. The liquid delivery pipe 19 is provided with a water circulation flow meter 20 and a water circulation solenoid valve 21.

[0048] The acid and odor gas removal device further includes a control device 22, a pH sensor 23, a liquid level sensor 24, a deodorizing liquid temporary storage tank 25, a delivery pump 26, a delivery pipeline I 27, a delivery pipeline II 28, a drain pipe 29, and a drain solenoid valve 30;

[0049] The inlet of the delivery pump 26 is connected to the delivery pipeline I 27, and the end of the delivery pipeline I 27 extends into the lower part of the deodorizing liquid temporary storage tank 25; the outlet of the delivery pump 26 is connected to the delivery pipeline II 28, and the end of the delivery pipeline II extends into the middle part of the bottom layer 4;

[0050] The detection ends of the pH sensor 23 and the liquid level sensor 24 are both arranged in the bottom layer 4, and are used to detect the pH and liquid level of the disinfectant in the bottom layer 4; a drainage pipe 29 is provided at the bottom of the bottom layer 4, and a drainage solenoid valve 30 is provided on the drainage pipe 29; a delivery solenoid valve 33 and a delivery flow meter 34 are provided at intervals on the delivery pipeline II 28;

[0051] The pH sensor 23, liquid level sensor 24, delivery pump 26, and discharge solenoid valve 30 are all electrically connected to the control device 22. The control device 22 is equipped with upper and lower pH thresholds, upper and lower liquid level thresholds, and a liquid level reference value.

[0052] When the pH sensor 23 transmits the detected pH to the control device 22 in real time, when the detected pH is lower than the lower limit value, the control device 22 controls the delivery pump 26 to start, replenishes disinfectant into the bottom layer 4, and controls the drain solenoid valve 30 to open for drainage; the liquid level sensor 24 transmits the detected real-time liquid level to the control device 22. When the real-time liquid level is lower than the lower limit value, the control device 22 controls the drain solenoid valve 30 to close until the liquid level reaches the liquid level reference value, and reopens the drain solenoid valve 30. When the real-time liquid level is higher than the lower limit value, the control device 22 controls the delivery pump 26 to close until the liquid level reaches the liquid level reference value; finally, when the detected pH reaches the upper limit value, the control device 22 controls the delivery pump 26 to stop working, and the drain solenoid valve 30 to close.

[0053] The deodorizing liquid temporary storage cylinder 25 is equipped with a temperature control system to control the temperature of the deodorizing liquid therein to a set value; the temperature sensor 31 is electrically connected to the control device 22, and the detection end of the temperature sensor 31 is arranged in the bottom layer 4 to measure the temperature of the disinfectant in the bottom layer 4. The control device 22 presets upper and lower temperature limits. When the temperature exceeds the upper limit, the discharge solenoid valve 30 is controlled to open the discharge, and at the same time, the delivery pump 26 is controlled to start the delivery of liquid, thereby reducing the temperature of the disinfectant in the bottom layer 4 until it reaches the preset value I; when the temperature is lower than the lower limit, the control device 22 controls the delivery pump 26 to start the delivery of liquid, thereby increasing the temperature of the disinfectant in the bottom layer 4 until it reaches the preset value II.

[0054] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for removing sour and odorous gases, comprising a tank body (1), a gas delivery unit, an immersion deodorizing packing layer (2), a spray exchange deodorizing unit, and a water and dust removing packing layer (3); characterized in that: The space inside the tank body (1) is divided into a bottom layer (4), a middle layer (5), and a top layer (6) from bottom to top; an immersion deodorizing filler layer (2) is provided in the bottom layer (4), the bottom layer (4) is filled with deodorizing liquid, and the immersion deodorizing filler layer (2) is immersed below the liquid surface; a plurality of groups of microbubble generators (7) are provided below the immersion contact deodorizing unit, and each group of microbubble generators (7) is connected to the gas delivery unit through an air inlet branch pipe (8); a spray exchange deodorizing unit is provided in the upper part of the middle layer (5), and a spray filler layer (9) is provided below the spray exchange deodorizing unit; a water and dust removal filler layer (3) is provided in the top layer (6); and an air outlet (10) is provided at the top of the tank body (1).

2. The device for removing sour and odorous gases according to claim 1, wherein: The bottom layer (4) and the middle layer (5), and the middle layer (5) and the top layer (6) are separated by baffles I (11) with through holes, respectively. A baffle II (32) with through holes is provided in the middle of the bottom layer (4), and the immersed deodorizing filler layer (2) is provided thereon.

3. The device for removing sour and odorous gases according to claim 2, wherein: A plurality of ventilation holes are evenly arranged on the baffle plate with through holes I (11) and the baffle plate with through holes II (32).

4. The device for removing sour and odorous gases according to claim 1, wherein: The gas delivery unit comprises a blower (12), a main pipe (13), an air intake branch pipe (8), and a branch pipe solenoid valve (14); the blower (12) is arranged outside the tank body (1) and is connected to a plurality of groups of air intake branch pipes (8) through the main pipe (13), and each group of air intake branch pipes (8) is provided with a branch pipe solenoid valve (14).

5. The device for removing sour and odorous gases according to claim 1, wherein: The specific surface area of ​​the submerged deodorizing filler layer (2) is 50-1000 m 2 / m 3 The specific surface area of ​​the spray packing layer (9) is 50-500 m 2 / m 3 .

6. The device for removing sour and odorous gases according to claim 1, wherein: The spray exchange deodorizing unit comprises a spray pipeline (15) and a spray head (16); The spray pipes (15) are arranged in a mesh shape and are arranged on the upper part of the middle layer (5). A plurality of vertically downward spray heads (16) are evenly spaced on the spray pipes (15); The deodorizing liquid extraction mechanism extracts the deodorizing liquid from the bottom layer (4) and transports it into the spraying pipeline (15).

7. The device for removing sour and odorous gases according to claim 6, wherein: The deodorizing liquid extraction mechanism comprises an extraction pump (17), an extraction pipe (18), and a liquid delivery pipe (19). The inlet of the extraction pump (17) is connected to the lower part of the bottom layer (4) through the extraction pipe (18), and the outlet of the extraction pump (17) is connected to the spray pipeline (15) through the liquid delivery pipe (19). The liquid delivery pipe (19) is provided with a water circulation flow meter (20) and a water circulation solenoid valve (21).

8. The device for removing sour and odorous gases according to claim 6, wherein: It also includes a control device (22), a pH sensor (23), a liquid level sensor (24), a deodorizing liquid temporary storage tank (25), a delivery pump (26), a delivery pipeline I (27), a delivery pipeline II (28), a liquid discharge pipe (29), and a liquid discharge solenoid valve (30); The inlet of the delivery pump (26) is connected to the delivery pipeline I (27), and the end of the delivery pipeline I (27) extends into the lower part of the deodorizing liquid temporary storage tank (25); the outlet of the delivery pump (26) is connected to the delivery pipeline II (28), and the end of the delivery pipeline II extends into the middle part of the bottom layer (4); The detection ends of the pH sensor (23) and the liquid level sensor (24) are both arranged in the bottom layer (4) and are used to detect the pH and liquid level of the disinfectant in the bottom layer (4); a drainage pipe (29) is provided at the bottom of the bottom layer (4), and a drainage solenoid valve (30) is provided on the drainage pipe (29); The delivery pipeline II (28) is provided with a delivery solenoid valve (33) and a delivery flow meter (34) at intervals; The pH sensor (23), liquid level sensor (24), delivery pump (26), and liquid discharge solenoid valve (30) are all electrically connected to the control device (22). The control device (22) is provided with upper and lower pH thresholds, upper and lower liquid level thresholds, and a liquid level reference value. When the pH sensor (23) transmits the detected pH to the control device (22) in real time, when the detected pH is lower than the lower limit value, the control device (22) controls the delivery pump (26) to start, replenishes the disinfectant into the bottom layer (4), and controls the discharge solenoid valve (30) to open and discharge the liquid; the liquid level sensor (24) transmits the detected real-time liquid level to the control device (22), when the real-time liquid level is lower than the lower limit value, the control device (22) controls the discharge solenoid valve (30) to close until the liquid level reaches the liquid level reference value, and reopens the discharge solenoid valve (30); when the real-time liquid level is higher than the lower limit value, the control device (22) controls the delivery pump (26) to close until the liquid level reaches the liquid level reference value; finally, when the detected pH reaches the upper limit value, the control device (22) controls the delivery pump (26) to stop working, and the discharge solenoid valve (30) to close.

9. The device for removing sour and odorous gases according to claim 8, wherein: The deodorizing liquid temporary storage tank (25) is provided with a temperature control system to control the temperature of the deodorizing liquid therein to a set value; The temperature sensor (31) is electrically connected to the control device (22). The detection end of the temperature sensor (31) is arranged in the bottom layer (4) to measure the temperature of the disinfectant in the bottom layer (4). The upper and lower temperature limits are preset in the control device (22). When the temperature exceeds the upper limit, the discharge solenoid valve (30) is controlled to open the discharge, and the delivery pump (26) is controlled to open the delivery, thereby reducing the temperature of the disinfectant in the bottom layer (4) until it reaches the preset value I. When the temperature is lower than the lower limit, the control device (22) controls the delivery pump (26) to open the delivery, thereby increasing the temperature of the disinfectant in the bottom layer (4) until it reaches the preset value II.

10. The device for removing sour and odorous gases according to claim 8, wherein: The water-dust removal filler layer (3) is filled with activated carbon; the diameter of the micro-nano bubbles formed by the micro-bubble generator (7) is 0.1nm-950um.

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