Waste gas separation and recovery device and use method

Abstract

The invention relates to the technical field of waste gas separation and recovery, in particular to a waste gas separation and recovery device and a using method. The invention provides a waste separation and recovery device and a use method, the waste separation and recovery device comprises a first box body and a second box body for separation and recovery, a box body and a box cover of the first box body are in sealed connection, and a first filter plate, a second filter plate and a third filter plate are respectively arranged in the box body for filtering waste; a motor is arranged in the center of the top of the second box body, a motor shaft of the motor is of a hollow structure and extends into the box body, viscous adsorption liquid is injected into the lower portion of the box body, the box body is provided with a plurality of gas distribution pipes connected with the gas inlet pipe, and the gas distribution pipes are provided with a plurality of exhaust holes and all extend into the adsorption liquid. Waste gas is separated, recycled and reused in the production process, and the purposes of reducing cost, saving energy and protecting the environment are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas separation and recovery, and in particular to a waste gas separation and recovery device and a use method thereof. Background Art

[0002] In industrial production, the existing technology for purifying waste gas is aimed at the treatment of industrial waste gas generated in industrial sites, such as dust particles, flue gas, odorous gases, and toxic and harmful gases. Common waste gas purification includes factory smoke waste gas purification, workshop dust waste gas purification, organic waste gas purification, waste gas odor purification, acid and alkali waste gas purification, chemical waste gas purification, etc.

[0003] Chinese patent CN118253156A discloses a waste gas treatment device for leather processing, including a filter box, an impurity filtering mechanism installed in the filter box, and a water treatment filtering mechanism connected to one side of the filter box. However, the structural design of the patent is unreasonable, and there are problems such as poor separation, recycling and reuse of waste gas and harmful substances, low energy-saving and environmental protection efficiency, and unstable quality of the produced products. Summary of the invention

[0004] In order to solve the technical problems existing in the above-mentioned prior art, the present invention provides a waste gas separation and recovery device and a method of use, through which the waste gas generated in the production is separated, recovered and reused, so as to achieve the purpose of energy saving and environmental protection by recycling the waste gas.

[0005] In order to achieve the above-mentioned purpose of the invention, the present invention provides a waste gas separation and recovery device, comprising a first box body and a second box body connected by a pipeline to separate and recover waste gas, the box body and the box cover of the first box body are tightly connected, the upper side of the box body is provided with a tightly connected air outlet pipe, the suction pump on the air outlet pipe sends the treated clean gas into the corresponding compression tank for recycling, the box body is respectively provided with a first filter plate made of glass fiber cloth material, a second filter plate made of non-woven fabric material and a third filter plate made of activated carbon material to filter the waste gas, the bottom of the first filter plate, the second filter plate and the third filter plate are provided with a support body and a base for fixing, the support body is provided with a sensor for wireless signal transmission with a control system, and the sensor will monitor the internal gas quality data;

[0006] A motor is provided at the top center position of the second box body, and the shaft of the motor is a hollow structure and extends into the interior of the box body. A viscous adsorption liquid is injected into the lower part of the box body. The upper side of the box body is hollow and connected to the air intake duct of the exhaust fan. The exhaust duct of the exhaust fan is connected to the box body. A plurality of first and second stirring rods arranged vertically up and down are fixedly connected to the lower side of the shaft. The first stirring rod is set to a stepped structure with a thick inner and a thin outer structure and is immersed in the adsorption liquid to separate harmful substances in the waste gas. The box body is provided with a plurality of air distribution pipes connected to the air inlet pipe. The air distribution pipes are provided with a plurality of exhaust holes and all extend into the adsorption liquid.

[0007] Preferably, each of the second stirring rods is provided with a plurality of spheres made of elastic material.

[0008] Preferably, the first box body is connected to the gas compression tanks on the first pump group, the second pump group and the third pump group through a plurality of output hoses, so as to recycle and reuse the gas that meets environmental protection requirements after separation; the second box body is connected to the collection tank group through a plurality of air intake hoses.

[0009] Preferably, the adsorption liquid is a diluted sodium silicate liquid or a heated starch solution.

[0010] Preferably, the upper side of the box body is in a hollow state and is connected to the air intake duct of the exhaust fan, and the hollow position of the upper side of the box body is one third.

[0011] Preferably, the heights of the first stirring rod and the second stirring rod are arranged at two-thirds of the box body.

[0012] Preferably, the air outlet pipe is a Z-shaped structure, the inner cavity of the Z-shaped structure is provided with a lower arc on the lower side, the inner cavity of the Z-shaped structure is provided with an upper arc on the lower side and the upper side, and the lower arc position is provided with a first inner shrinkage opening and a second inner shrinkage opening whose two ends are both contracted inward and connected together.

[0013] Preferably, the ratio of the diameter of the first inner contraction opening and the second inner contraction opening to the diameter of the air outlet is 1:1.5-2.

[0014] Preferably, a collection bag is provided on the card interface outside the upper arc.

[0015] A method for using a waste gas separation and recovery device, the method comprising the following steps:

[0016] The gas containing waste gas is sucked into the box by the suction fan on the air inlet pipe, and enters the adsorption liquid through the air holes on the gas distributor. The rotation of the motor drives the first stirring rod and the second stirring rod to rotate and stir the adsorption liquid to adsorb harmful gases and solid particles in the waste gas. The sphere made of elastic material breaks the bubbles in the adsorption liquid. The exhaust fan sends the gas passing through the adsorption liquid into the first box. The first filter plate made of glass fiber cloth material, the second filter plate made of non-woven fabric material and the third filter plate made of activated carbon material filter the waste gas. The suction pump sends the treated clean gas into the corresponding gas compression tanks on the first pump group, the second pump group and the third pump group for recycling.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention can quickly recycle waste gas and filtered precipitated materials for reuse, saving raw materials and making the surrounding production environment meet environmental protection requirements;

[0019] 2. The present invention has a simple structure, low cost and high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention.

[0021] Figure 1 This is an external structural diagram of the waste gas separation and recovery device of the present invention;

[0022] Figure 2 for Figure 1 Internal structure diagram;

[0023] Figure 3 for Figure 1 Structural cross-sectional view of the middle outlet pipe;

[0024] Figure 4 This is an overall structural diagram of Example 1 of the present invention.

[0025] Reference numerals

[0026] In the figure, A-first box, A1-top cover, A2-air suction pump, A3-exhaust pipe, A31-air outlet, A32-upper arc, A33-inner cavity, A34-first inner shrinkage, A35-second inner shrinkage, A36-lower arc, A37-collection bag, A38-card interface, A4-box body, A5-support body, A6-sensor, A7-base, A8-first filter plate, A9-second filter plate, A10-third filter plate; B-second box, B1-exhaust fan, B2-motor, B3-inlet pipe, B4-box, B5-distribution Air cylinder, B6-first stirring rod, B7-step structure, B8-rotating shaft, B9-elastic sphere, B10-second stirring rod; C-output hose; D-intake hose; 1-conveying device; 2-tooling rack; 3-control cabinet; 10-first pump group, 11-first material tank, 12-first spray chamber; 13-first collecting tank; 20-second pump group, 21-second material tank, 22-second spray chamber; 23-second collecting tank; 30-third pump group, 31-third material tank, 32-third spray chamber, 33-third collecting tank, 34-fourth material tank.

[0027] Among them, the gas selected in this application is carbon dioxide gas. Since carbon dioxide gas has a large specific gravity and is easy to recycle, and its chemical properties are stable and not prone to oxidation reactions, it is more conducive to ensuring that the product remains stable during the production process. DETAILED DESCRIPTION

[0028] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0029] Example 1

[0030] like Figure 1-4As shown, a waste gas separation and recovery device provided by the present invention comprises a first box body A and a second box body B which are connected by pipelines to separate and recover waste gas. The first box body A and the second box body B are made of hard plastic material or stainless steel material. The first box body A is respectively connected to the gas compression tanks on the first pump group 10, the second pump group 20 and the third pump group 30 through a plurality of output hoses C, so as to recycle and reuse the gas materials that meet the environmental protection requirements after separation treatment; the second box body B is respectively connected to the collection tank group through a plurality of intake hoses D, and the collection tank group comprises a first collection tank 13 arranged at the lower side of the first spray chamber 12, a second collection tank 23 at the lower side of the second spray chamber 22 and a third collection tank 23 at the lower side of the third spray chamber 33. The control system controls the valves on the intake hoses to open and close, and the waste gas is respectively transported to the second box body B and the first box body A for separation, impurity removal, purification, recovery and recycling. The specific structure of the first box body A includes a box body A4 and a box cover A1 which are connected in a sealed manner. A sealed outlet pipe A3 is provided on the upper side of the box body A4. The suction pump A2 on the outlet pipe A3 sends the treated clean gas into the corresponding compression tank for recycling. The box body A4 is provided with a first filter plate A8 made of glass fiber cloth material, a second filter plate A9 made of non-woven fabric material and a third filter plate A10 made of activated carbon material to filter the waste gas. In order to ensure that the first filter plate A8 and the second filter plate A9 are installed The first filter plate A8, the second filter plate A9 and the third filter plate A10 are firmly fixed and easy to replace. The bottom of the first filter plate A8, the second filter plate A9 and the third filter plate A10 is fixed with a support body A5 and a base A7. The gap between the two support bodies A5 and the base A7 is slightly smaller than the thickness of the first filter plate A8, the second filter plate A9 and the third filter plate A10. In order to dynamically monitor the gas quality data in the box body A4 at any time, the support body A5 is provided with a sensor A6 for wireless signal transmission with the control system, and the sensor A6 will monitor the data of the internal gas mixture. In this embodiment, the specific structure of the second box body B includes a box body B4 with a motor B2 at the top center position, and the shaft B8 of the motor B2 is a hollow structure and extends into the box body B4. In order to increase the adsorption effect and efficiency, the box body B4 is injected with an adsorption liquid, and the adsorption liquid can be selected from water, alkaline water, acid water or a viscous adsorption liquid with a thickener. In this embodiment, the lower part of the box B4 is injected with a viscous adsorption liquid, and the selected adsorption liquid is a diluted sodium silicate liquid (commonly known as water glass liquid) or a heated starch dilution liquid, because the starch dilution liquid will become transparent after heating. In order to facilitate the observation of the adsorption effect of the adsorbed waste gas, an observation window is provided on the box B4, and the observation window can facilitate the observation of the state of the transparent adsorption liquid in the box B4. When the color of the transparent adsorption liquid in the box B4 turns dark brown, it is replaced in time. The viscous adsorption liquid plays a role in increasing the adsorption of harmful gases and solid particles in the waste gas.In this embodiment, in order to facilitate the collection and reuse of recycled gases, the upper side of the box body B4 is hollow and connected to the air intake duct of the exhaust fan B1. The exhaust duct of the exhaust fan B1 is connected to the box body A4. The lower side of the machine shaft B8 is fixedly connected to a plurality of first stirring rods B6 and second stirring rods B10 arranged vertically upper and lower. The first stirring rods B6 are arranged as a stepped structure with a thick inner and a thin outer structure and are immersed in the adsorption liquid to separate harmful substances in the waste gas. The box body B4 is provided with a plurality of air distribution pipes B5 connected to the air inlet pipe B3. The air distribution pipes B5 are provided with a plurality of exhaust holes and all extend into the adsorption liquid. In this embodiment, each of the second stirring rods B10 is provided with a plurality of spheres B9 made of elastic material, and the heights of the first stirring rod B6 and the second stirring rod B10 are set at two-thirds of the box body A4. When the first stirring rod B6 and the second stirring rod B10 rotate to stir the adsorption liquid, they play a role in promoting the adsorption of harmful gases and solid particles in the waste gas by the adsorption liquid; in order to make the adsorption effect better, a plurality of spheres B9 made of elastic material are provided on the upper side of each second stirring rod B10, and the elastic material of the spheres B9 is made of silicone material. When the machine shaft B8 rotates When the adsorption liquid is stirred, the elastic sphere B9 plays a role in quickly breaking up the bubbles in the adsorption liquid during stirring, and also plays a role in allowing the adsorption liquid to have multiple rotation speeds and directions at the same time, thereby improving the adsorption effect; in order to strengthen the adsorption effect of the adsorption liquid on harmful gases and solid particles in the waste gas, the first stirring rod B6 is a stepped structure with a thick inner and a thin outer structure. At the same time, when the machine shaft B8 rotates, the first stirring rod B6 with a stepped structure forms different stirring directions and speed changes at the stepped structure, so that the first stirring rod B6 produces different stirring forces on the adsorption liquid, thereby improving the adsorption effect of the adsorption liquid. Among them, the box body B4 is surrounded by a gas distributor B5 connected to the air inlet pipe B3. The gas distributor B5 is provided with a number of exhaust holes that extend into the adsorption liquid, which can evenly introduce the waste gas into the adsorption liquid, thereby improving the effect of adsorbing solid waste in the waste gas.

[0031] In order to improve the adsorption effect, the air outlet pipe A3 is set to a Z-shaped structure, the inner cavity A33 is provided with a lower arc A36 on the lower side, and an upper arc A32 on the upper side. The lower arc A36 is provided with a first inner contraction A34 and a second inner contraction A35 at both ends of which are contracted inward and connected together. Due to the setting of a structure with a thin middle and thick two ends, the middle pressure is increased to ensure that there is no residual matter inside the air outlet pipe A3.

[0032] In the preferred technical solution, the ratio of the diameter of the first inner contraction A34 and the second inner contraction A35 to the diameter of the air outlet 31 is 1:1.5 to 2. Furthermore, the ratio of the diameter of the first inner contraction A34 and the second inner contraction A35 to the diameter of the air outlet 31 is 1:1.6. After testing, it was found that the pipe structure with a diameter ratio of 1:1.6 had no residue inside the air outlet pipe A3 and had the best effect.

[0033] In order to make the recovered gas cleaner, a collection bag A37 is provided on the card interface A38 outside the upper arc A32. When there is a small amount of debris in the collected gas, it can fall into the collection bag A37 when passing through the upper arc A32, making the recovered gas cleaner.

[0034] The method for using the waste gas separation and recovery device of the present invention is as follows:

[0035] In this embodiment, the soft material is rawhide of cow, sheep or pig, which is described in detail as follows:

[0036] Step 1: The operator immerses the untreated raw hide in a fresh water pool for more than 2 hours to release the sewage inside, then takes out the soaked raw hide, and performs depilation after low-temperature drying at 60°C to 70°C to obtain a depilated soft material, and sprays an enzyme treatment liquid on the surface of the depilated soft material, wherein the enzyme treatment liquid is a mixture of 40U / g lipase JZ, 20U / g protease JRH and 4U / g saccharifying enzyme TH to obtain a degreased soft material;

[0037] Step 2: Softening Step

[0038] 100 parts of casein are added into a reaction tank to be dissolved and heated to 80°C, and then 10 parts of borax are added and stirred until the casein is completely dissolved, and then coated on the surface of the defatted rawhide, and allowed to stand for more than 10 minutes, and then the defatted rawhide is washed with pure water for more than 2 times, and the washed rawhide is immersed in a mixed acid solution, which is a mixed solution of 40% sulfone acid polymer and 0.4% formic acid, mixed in a volume ratio of 1:0.5, and the total volume ratio of the mixed acid solution to the defatted rawhide is 1:0.6, and the rawhide after acid immersion is kept for more than 120 minutes, and then the treated rawhide is sprayed with trypsin at 30°C for 30 minutes, and then the pH value is adjusted to 8.5 by adding NaOH, and the softening time is more than 5 hours to obtain the softened rawhide to be treated;

[0039] Step 3: First processing step

[0040] The operator turns on the main switch of the equipment, and the conveying device 1 starts to deliver the raw hide to be processed into the middle position of the first spray chamber 12. The valve on the injection group in the first spray chamber 12 is switched, and high-pressure compressed gas is ejected and carries the quartz sand in the first material tank 11 to sandblast the raw hide to be processed. The injection pressure range of the material sprayed by the injection head is 6-8MPa. The conveying device 1 makes the soft material leather to be processed move back and forth at a uniform speed in the middle of the first injection group, and the reciprocating frequency is 2 times / minute. The sandblasting time is 5-10 minutes. After the sandblasting time is reached, the control system allows the conveying device 1 to deliver the soft raw hide that has completed the sandblasting to obtain the processed primary sandblasted raw hide material, and the gas containing waste gas is discharged by the intake pipe B3. The suction fan sucks into the box B4 and enters the adsorption liquid through the air holes on the gas distributor B5. The motor B2 rotates to drive a stirring rod B6 and a second stirring rod B10 to rotate and stir the adsorption liquid to adsorb harmful gases and solid particles in the waste gas. The sphere B9 made of elastic material breaks the bubbles in the adsorption liquid. The exhaust fan B1 sends the gas passing through the adsorption liquid into the first box A. The first filter plate A8 made of glass fiber cloth material, the second filter plate A9 made of non-woven fabric material and the third filter plate A10 made of activated carbon material filter the waste gas. The suction pump A2 sends the treated clean gas into the corresponding gas compression tanks on the first pump group 10, the second pump group 20 and the third pump group 30 for recycling.

[0041] Step 4: Second processing step

[0042] The operator turns on the equipment switch and adjusts the initially sandblasted soft leather at the front end of the second spray chamber 12. The conveying device 1 delivers the initially sandblasted soft leather material to the middle position in the second spray chamber 22, opens the injection valve, and the high-pressure gas is ejected carrying the quartz sand in the second material tank 21 to perform sandblasting tanning on the initially sandblasted soft leather, so that the initially sandblasted soft leather forms a wave-breaking shape with different heights on the upper and lower parts for tanning. The conveying device 1 moves the initially sandblasted soft leather back and forth at a uniform speed in the middle of the injection group, with a reciprocating frequency of 1 time / minute and a processing time range of 20 to 30 minutes. After the sandblasting time is reached, the conveying device 1 delivers the soft leather that has completed the tanning and sandblasting treatment to obtain soft leather, and the gas containing waste gas is taken into the air intake pipe. The suction fan on B3 sucks the gas into the box B4, and the gas enters the adsorption liquid through the air holes on the gas distributor B5. The motor B2 rotates to drive a stirring rod B6 and a second stirring rod B10 to rotate and stir the adsorption liquid to adsorb harmful gases and solid particles in the adsorbed waste gas. The ball B9 made of elastic material breaks the bubbles in the adsorption liquid. The exhaust fan B1 sends the gas passing through the adsorption liquid into the first box A. The first filter plate A8 made of glass fiber cloth material, the second filter plate A9 made of non-woven fabric material and the third filter plate A10 made of activated carbon material filter the waste gas. The suction pump A2 sends the treated clean gas into the corresponding gas compression tanks on the first pump group 10, the second pump group 20 and the third pump group 30 for recycling.

[0043] Step 5: Third processing step

[0044] After the operator takes the obtained soft soft leather at the front end of the third spray chamber 32, it is placed on the circular work surface, the switch is turned on, and the conveying device 1 is used to send the work surface of the raw leather into the middle position of the third spray chamber 32, and the heating plate on the lower side of the work surface is turned on for preheating. The preheating temperature is 70°C to 90° to facilitate the curing of the adhesive and sand particles. The valve switches of the air supply pipe and the feed pipe are turned on, and the control system uniformly sprays the compressed gas, the circular quartz sand particles stored in the third material tank 21, and the adhesive in the fourth material tank 34 onto the surface of the soft soft leather to form a mixture layer. The compressed gas sprays the quartz sand and the adhesive from the injection head to form a crust layer with more than one layer of sand particles on the soft raw leather to be processed on the work surface. The compressed gas increases the surface area of ​​the sand particles and the adhesive is completely bonded. The conveying device 1 moves the soft raw leather with a layer of shell back and forth at a uniform speed under the multiple injection heads. The reciprocating frequency is 1 time / minute, and the time range is 3 to 5 minutes, and the required crust is reached. After the shell thickness requirement is met, the conveying device 1 delivers the soft rawhide with the shell. After the operator removes the solid shell, it is washed with clean water for more than 30 minutes to obtain a clean soft rawhide. The gas containing waste gas is sucked into the box B4 by the suction fan on the air inlet pipe B3, and enters the adsorption liquid through the air holes on the gas distributor B5. The motor B2 rotates to drive a stirring rod B6 and a second stirring rod B10 to rotate and stir the adsorption liquid to adsorb harmful gases and solid particles in the adsorbed waste gas. The ball B9 made of elastic material breaks the bubbles in the adsorption liquid. The exhaust fan B1 sends the gas passing through the adsorption liquid into the first box A. The first filter plate A8 made of glass fiber cloth material, the second filter plate A9 made of non-woven fabric material and the third filter plate A10 made of activated carbon material filter the waste gas. The suction pump A2 sends the treated clean gas into the corresponding gas compression tanks on the first pump group 10, the second pump group 20 and the third pump group 30 for recycling.

[0045] Step 6: Turn over the cleaned soft leather on one side, repeat the processing steps in step 5, and after obtaining qualified clean soft leather, move it to a storage warehouse and hang it for air drying at room temperature for standby use. Since the gravity of the shell presses on the soft leather, the shell increases the density of the soft leather, thereby improving the quality of the soft leather;

[0046] Step 7: During the operation, the operator uses the control system in the control cabinet 3 for signal transmission to open the valves of several output hoses on the first box A, and recycles the clean carbon dioxide gas into the gas compression tanks on the first pump group 10, the second pump group 20 and the third pump group 30 for further recycling, thereby achieving the purpose of energy saving and environmental protection.

[0047] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0048] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A waste gas separation and recovery device, comprising a first box (A) and a second box (B) connected by a pipeline to separate and recover waste gas, characterized in that: The box body (A4) and the box cover (A1) of the first box body (A) are tightly connected, and a tightly connected air outlet pipe (A3) is provided on the upper side of the box body (A4). The air suction pump (A2) on the air outlet pipe (A3) sends the treated clean gas into the corresponding compression tank for recycling. The box body (A4) is respectively provided with a first filter plate (A8) made of glass fiber cloth material, a second filter plate (A9) made of non-woven fabric material and a third filter plate (A10) made of activated carbon material to filter waste gas. The bottoms of the first filter plate (A8), the second filter plate (A9) and the third filter plate (A10) are provided with a support body (A5) and a base (A7) for fixing. The support body (A5) is provided with a sensor (A6) for wireless signal transmission with the control system, and the sensor (A6) monitors the internal gas quality data. A motor (B2) is provided at the top center of the second housing (B), the shaft (B8) of the motor (B2) is a hollow structure and extends into the housing (B4), the lower part of the housing (B4) is injected with adsorption liquid, the upper part of the housing (B4) is hollow and communicates with the air intake duct of the exhaust fan (B1), the exhaust duct of the exhaust fan (B1) is communicated with the housing body (A4), a plurality of first stirring rods (B6) and second stirring rods (B10) arranged vertically in the upper and lower directions are fixedly connected to the lower side of the shaft (B8), the first stirring rod (B6) is set as a stepped structure with a thick inner part and a thin outer part and is immersed in the adsorption liquid to separate harmful substances in the waste gas, the housing (B4) is provided with a plurality of air distribution pipes (B5) connected with the air inlet pipe (B3), the air distribution pipes (B5) are provided with a plurality of exhaust holes and are all immersed in the adsorption liquid.

2. The waste gas separation and recovery device according to claim 1, characterized in that: Each of the second stirring rods (B10) is provided with a plurality of balls (B9) made of elastic material.

3. The waste gas separation and recovery device according to claim 1 or 2, characterized in that: The first box (A) is connected to the gas compression tanks on the first pump group (10), the second pump group (20) and the third pump group (30) through a plurality of output hoses (C), so as to recycle and reuse the gas that meets environmental protection requirements after separation; the second box (B) is connected to the collection tank group through a plurality of air intake hoses (D).

4. The waste gas separation and recovery device according to claim 1, characterized in that: The adsorption liquid is a diluted sodium silicate liquid or a heated starch dilution liquid.

5. The waste gas separation and recovery device according to claim 1, characterized in that: The hollow position on the upper side of the box body (B4) is arranged at one third of the overall structure.

6. The waste gas separation and recovery device according to claim 1, characterized in that: The heights of the first stirring rod (B6) and the second stirring rod (B10) are set at two-thirds of the height of the box body (A4).

7. The waste gas separation and recovery device according to claim 1, characterized in that: The air outlet pipe (A3) is a Z-shaped structure, the Z-shaped structure inner cavity (A33) is provided with a lower arc (A36) on the lower side, the Z-shaped structure inner cavity (A33) is provided with an upper arc (A32) on the upper side, and the lower arc (A36) is provided with a first inner contraction opening (A34) and a second inner contraction opening (A35) at both ends of which are contracted inwards and connected together.

8. The waste gas separation and recovery device according to claim 7, characterized in that: The ratio of the diameter of the first inner contraction opening (A34) and the second inner contraction opening (A35) to the diameter of the air outlet (31) is 1:1.5-2.

9. The waste gas separation and recovery device according to claim 7, characterized in that: A collection bag (A37) is provided on the card interface (A38) outside the upper arc (A32).

10. A method for using the waste gas separation and recovery device according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: The gas containing waste gas is sucked into the box (B4) by the suction fan on the air inlet pipe (B3), and enters the adsorption liquid through the air holes on the gas distributor (B5). The motor (B2) rotates to drive the first stirring rod (B6) and the second stirring rod (B10) to rotate and stir the adsorption liquid, thereby adsorbing harmful gases and solid particles in the waste gas. The ball (B9) made of elastic material breaks the bubbles in the adsorption liquid. The exhaust fan (B1) sends the gas passing through the adsorption liquid into the first box (A). The first filter plate (A8) made of glass fiber cloth material, the second filter plate (A9) made of non-woven fabric material and the third filter plate (A10) made of activated carbon material filter the waste gas. The suction pump (A2) sends the treated clean gas into the corresponding gas compression tanks on the first pump group (10), the second pump group (20) and the third pump group (30) for recycling.

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