A chemical equipment exhaust gas filtration device and method

Abstract

This invention discloses a chemical equipment waste gas filtration device and method, belonging to the field of waste gas filtration technology. It includes: a spray tower and a filter box connected in series; a packing frame is installed inside the spray tower, and multiple packing materials are stacked within the packing frame; the packing material includes a first ring, with arc-shaped plates arranged in a circumferential array on both sides of the first ring, and the arc-shaped plates on both sides are staggered to make the packing material have a hollow, spherical shape; lightweight small balls are placed in the hollow part of the packing material. This invention, through the arrangement of the packing material, arc-shaped plates, and lightweight small balls, not only effectively improves the absorption rate of inorganic waste gas, thereby improving the filtration effect, but also causes the packing material to vibrate, causing the adsorbed liquid film to collect with dust and fall to the bottom of the spray tower with the water flow, preventing clogging and eliminating the need for frequent shutdowns for cleaning, ensuring the continuity and stability of equipment operation, and effectively improving filtration efficiency.

Description

Technical Field

[0001] This invention relates to the field of waste gas filtration technology, specifically to a waste gas filtration device and method for chemical equipment. Background Technology

[0002] The waste gas generated by chemical equipment usually contains organic and inorganic waste gas. When discharging the waste gas, it is necessary to filter the organic and inorganic waste gas. In the existing technology, inorganic waste gas is usually filtered by spray tower and organic waste gas is filtered by activated carbon.

[0003] In existing technologies, Raschig rings, Pall rings, arc saddles, and rectangular saddles are common choices for spray tower packings. However, the regular geometric shapes lead to a single airflow path, resulting in short residence time and uneven distribution of exhaust gas within the packing layer, and insufficient gas-liquid contact area. Especially when treating high-concentration inorganic exhaust gas, incomplete local reactions are likely to occur, making it difficult to further improve absorption efficiency. Moreover, when treating complex exhaust gas containing dust, dust easily combines with the liquid film on the packing surface to form sticky deposits, gradually clogging the packing gaps. This not only reduces filtration efficiency but also increases system pressure drop, requiring frequent shutdowns for cleaning, which seriously affects the stability of equipment operation. The liquid film on the surface of static packing is prone to saturation or caking due to long-term retention, making it difficult to effectively adsorb new pollutants through its own dynamic renewal, further aggravating the packing clogging problem and affecting the continuity of exhaust gas treatment. Summary of the Invention

[0004] The purpose of this invention is to provide a chemical equipment exhaust gas filtration device and method to solve the technical problem of easy clogging of packing in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a chemical equipment exhaust gas filtration device, comprising:

[0006] A spray tower and a filter box are connected together. The spray tower is equipped with a packing frame, and multiple packing materials are stacked inside the packing frame.

[0007] The packing includes a first ring, and arc-shaped plates are arranged in a circumferential array on both sides of the first ring. The arc-shaped plates on both sides are staggered so that the packing is hollow and spherical in shape. Lightweight small balls are arranged in the hollow part of the packing.

[0008] The stacked packing filters the exhaust gas. As the exhaust gas flows from the lower packing layer to the upper layer, the arc-shaped plate exponentially divides the airflow. The lightweight balls cause the airflow passing through the central void of the packing to diffuse radially and change its direction, so that multi-directional airflow is generated inside the stacked packing and pushes the lightweight balls to produce irregular impact motion in the central void of the packing.

[0009] Preferably, a third ring is fixedly arranged in a circular array on both sides of the first ring, the third ring is spaced apart from the arc plate, and a fourth ring is arranged on the inner edge of the middle position of the third ring.

[0010] Preferably, a second ring is symmetrically arranged on both sides of the first ring, and the second ring is located on the outer edge of the third ring and the middle part of the arc plate.

[0011] Preferably, a frustum column is fixedly installed at the central axis of the packing frame, and the frustum column has an air chamber and an air passage.

[0012] Preferably, the air inlet and outlet of the air passage are connected to the air chamber and the packing stack area, respectively. The air inlet of the air passage is located at the lower end and is inclined along the tangent direction of the circular horizontal cross section of the air chamber.

[0013] Preferably, an annular water pipe is fixedly installed inside the spray tower, and nozzles are arranged in a circumferential array on the annular water pipe, with the spray range of the nozzles covering the top layer of packing.

[0014] Preferably, the annular water pipe is connected to a water tank, and a purifier is connected between the water tank and the spray tower.

[0015] Preferably, the spray tower is provided with an air inlet pipe at the air inlet, and centrifugal blades are arranged in a circumferential array at the air outlet of the air inlet pipe.

[0016] Preferably, activated carbon is provided inside the filter box.

[0017] A method for using a chemical equipment exhaust gas filtration device includes the following steps:

[0018] S1: The exhaust gas is introduced into the spray tower through the inlet pipe. The exhaust gas forms a vortex and is slowed down by the centrifugal blades at the outlet of the inlet pipe.

[0019] S2: The first water pump introduces the absorbent liquid from the water tank into the annular water pipe and sprays it onto the packing material through the nozzle. The absorbent liquid gradually seeps into the stacked packing material and forms a liquid film on the surface of the packing material.

[0020] S3: Start the fan, and the exhaust gas flows from the bottom to the top of the spray tower. When passing through the packing, the inorganic exhaust gas in the exhaust gas comes into deep contact with the absorbent liquid on the surface of the packing, and a full absorption and neutralization reaction of the gas and liquid phases occurs, thereby filtering the inorganic exhaust gas in the exhaust gas.

[0021] S4: The pre-filtered exhaust gas enters the filter box through the first pipe at the top of the spray tower. The activated carbon in the filter box adsorbs and filters the organic waste gas in the exhaust gas.

[0022] S5: The gas that has undergone secondary filtration is discharged through the exhaust pipe.

[0023] The chemical equipment exhaust gas filtration device and method provided by the present invention, as described above, have the following beneficial effects:

[0024] This invention utilizes a stacked packing material, an arc-shaped plate, and lightweight small balls to filter waste gas. As the waste gas flows from the lower to the upper layers of the packing, the arc-shaped plate exponentially divides the airflow, reacting and slowing it down after each division. This results in a thorough absorption and neutralization reaction between the gas and liquid phases, effectively improving the absorption rate of inorganic waste gas and thus enhancing the filtration effect. The lightweight small balls cause the airflow passing through the central voids of the packing to diffuse radially and change its direction, generating multi-directional airflow within the stacked packing and propelling the lightweight small balls to undergo irregular impact motion within the central voids. This causes the packing to vibrate, resulting in the adsorbed liquid film carrying dust collecting and falling to the bottom of the spray tower with the water flow. This allows the stacked packing to directly filter waste gas containing dust without easily clogging, eliminating the need for frequent shutdowns for cleaning, ensuring continuous and stable equipment operation, and effectively improving filtration efficiency. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0026] Figure 1 A front-view perspective view provided for an embodiment of the present invention;

[0027] Figure 2 A right-side perspective view provided for an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the front cross-sectional structure provided in an embodiment of the present invention;

[0029] Figure 4 A schematic diagram of the cross-sectional structure of a frustum provided in an embodiment of the present invention;

[0030] Figure 5 This is a three-dimensional structural diagram of the packing material provided in an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the exploded structure of the packing material provided in an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the front cross-sectional structure of the packing provided in an embodiment of the present invention;

[0033] Figure 8 This is a schematic diagram of the packing arrangement structure provided in an embodiment of the present invention;

[0034] Figure 9 This is a schematic diagram of the airflow direction structure of the packing provided in an embodiment of the present invention.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Spray tower; 2. Filter box; 3. Exhaust stack; 4. Water tank; 5. Purifier; 6. Air inlet pipe; 7. Annular water pipe; 8. Packing frame; 9. Packing; 91. First ring; 92. Second ring; 93. Arc plate; 94. Third ring; 95. Lightweight sphere; 96. Fourth ring; 10. Frustum column; 101. Air chamber; 102. Air passage. Detailed Implementation

[0037] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0038] like Figure 1-9 As shown, a chemical equipment exhaust gas filtration device includes:

[0039] The spray tower 1 and the filter box 2 are connected. The spray tower 1 is equipped with a packing frame 8, and the packing frame 8 is filled with packing 9.

[0040] The packing 9 includes a first ring 91. Arc plates 93 are arranged in a circumferential array on both sides of the first ring 91. The arc plates 93 on both sides are staggered so that the packing 9 is hollow and spherical in shape. Lightweight small balls 95 are arranged in the hollow part inside the packing 9.

[0041] The stacked packing 9 filters the exhaust gas. As the exhaust gas flows from the lower layer of packing 9 to the upper layer, the arc plate 93 divides the airflow in an exponential shape. The lightweight balls 95 cause the airflow passing through the central void of the packing 9 to diffuse radially and change its direction, so that multi-directional airflow is generated inside the stacked packing 9 and pushes the lightweight balls 95 to produce irregular impact motion in the central void of the packing 9.

[0042] Specifically, when filtering the exhaust gas, the exhaust gas first passes through the spray tower 1 to filter the inorganic exhaust gas, and then enters the filter box 2 through the first pipe at the top of the spray tower 1 to filter the organic exhaust gas. Then, the exhaust gas that has undergone secondary filtration is extracted through the exhaust fan connected to the outlet of the filter box 2 and discharged through the exhaust pipe 3 connected to the exhaust fan outlet, thereby completing the filtration of the exhaust gas from the chemical equipment. Secondary filtration can filter both organic and inorganic substances in the exhaust gas, thereby improving the filtration effect.

[0043] Furthermore, the waste gas is introduced into the spray tower 1 through the air inlet. At the same time, the spray assembly set above the packing frame 8 sprays the absorbent liquid into the packing 9 that is filled and stacked together in the packing frame 8. The absorbent liquid gradually seeps into the stacked packing 9 and forms a liquid film on the surface of the packing 9. The waste gas flows from the bottom to the top of the spray tower 1. When passing through the packing 9, the inorganic waste gas in the waste gas comes into deep contact with the absorbent liquid on the surface of the packing 9, and a full absorption and neutralization reaction of the gas and liquid phases occurs, thereby filtering the inorganic waste gas in the waste gas.

[0044] Furthermore, when the airflow passes through the stacked packing 9, since the packing 9 includes a first ring 91, and both sides of the first ring 91 are arranged in a circumferential array with arc-shaped plates 93, and the arc-shaped plates 93 on both sides are staggered so that the packing 9 as a whole is arranged in a hollow spherical shape, such as... Figure 8 The diagram shows a stacking arrangement of the packing 9. The packing 9 can be arranged with each layer corresponding to the previous one, or the upper layer of packing 9 can be located in the gap between two parallel packing layers of the lower layer, thus causing the positions of each layer of packing 9 to be staggered. However, regardless of the stacking arrangement, the bottom arc plate 93 of the upper layer of packing 9 and the top arc plate 93 of the lower layer of packing 9 will be partially misaligned, thus creating an interlocking effect. As the exhaust gas passes through the stacked packing 9, it first undergoes initial diversion through the bottom arc plate 93 of the first layer of packing 9 and flows upward between two adjacent arc plates 93. It then reacts with the liquid film on the surface of the bottom arc plate 93 of the first layer of packing 9, thereby absorbing the inorganic exhaust gas in the airflow. At the same time, due to the frictional resistance of the surface of the arc plate 93 to the airflow, the airflow is initially decelerated.

[0045] Furthermore, as the airflow rises and passes the arc-shaped plate 93 at the top of the first layer of packing 9, due to the misalignment of the arc-shaped plates 93 on both sides of the first ring 91 of the packing 9, the airflow between two adjacent arc-shaped plates 93 at the bottom of the packing 9 is further divided when it passes the arc-shaped plate 93 at the top of the packing 9. After merging with the divided airflow on the adjacent side, it continues to flow upwards along the space between the adjacent arc-shaped plates 93 at the top of the packing 9, reacting with the liquid film on the surface of the arc-shaped plate 93 at the top of the packing 9, and slowing down again. This allows for a second reaction and absorption of the secondary divided airflow, further reducing the inorganic waste gas content in the waste gas. Regardless of the stacking arrangement, the arc-shaped plates 93 at the bottom of the upper packing 9 and the arc-shaped plates 93 at the top of the lower packing 9 are always aligned. There will be some misalignment, so when the airflow passes through the first layer of packing 9 and enters the second layer of packing 9, the airflow is again divided by the arc-shaped plate 93 at the bottom of the second layer of packing 9. This process continues, with the airflow being divided and merged, and then divided again. As the airflow passes through the stacked packing 9, the content of inorganic waste gas is reduced first, and then it is divided again. After merging with the divided airflow, it reacts again and decelerates, thereby further reducing the content of inorganic waste gas. This results in the airflow being divided exponentially, reacting and decelerating after each division, thus causing a full absorption and neutralization reaction between the gas and liquid phases. This effectively improves the absorption rate of inorganic waste gas, thereby improving the filtration effect. At the same time, compared with the existing spherical packing, the misaligned setting of the arc-shaped plate 93 not only reduces the amount of arc-shaped plate 93 used, thereby reducing weight and manufacturing costs, but also provides a better absorption effect for inorganic waste gas.

[0046] Furthermore, since the packing 9 is arranged in a hollow spherical shape, and lightweight small balls 95 are arranged in the hollow part of the packing 9, when the airflow passes through the central gap of the packing 9, it first blows the lightweight small balls 95 to the top, and the arc plate 93 limits the lightweight small balls 95, so that the lightweight small balls 95 stop when they move to the top of the central gap, and the airflow changes its direction when passing through the lightweight small balls 95, causing the airflow to diffuse around the lightweight small balls 95 and neutralize with the liquid film on the surface of the lightweight small balls 95, and absorb the inorganic waste gas in the exhaust gas passing through the lightweight small balls 95. After dispersion, the airflow with changed direction is divided by the arc plate 93. Part of the airflow merges with the airflow between two adjacent arc plates 93, and part of the airflow flows along the arc plate 93 to the next layer of packing 9, and flows to the lightweight small balls 95 of the next layer of packing 9, such as... Figure 9 As shown, this further improves the absorption rate of inorganic waste gas through the airflow in the central void of packing 9, further improves the overall absorption rate of inorganic waste gas, and thus further improves the filtration effect.

[0047] Furthermore, the lightweight balls 95 are propelled by airflow from different directions, causing them to move randomly in the central gap of the packing 9. This impacts the packing 9, causing it to vibrate. Since the exhaust gas contains dust, it adheres to the surface of the liquid film as it passes through the packing 9. As the dust accumulates, the gaps in the packing 9 become blocked. The random impact of the lightweight balls 95 causes the packing 9 to vibrate, allowing the adsorbed liquid film to collect with the dust and fall into the bottom of the spray tower 1 with the water flow. This allows the stacked packing 9 to directly filter the dusty exhaust gas without easily clogging, eliminating the need for frequent shutdowns for cleaning, ensuring the continuity and stability of equipment operation, and effectively improving filtration efficiency.

[0048] As a further embodiment of the present invention, a third ring 94 is fixedly arranged in a circular array on both sides of the first ring 91. The third ring 94 is spaced apart from the arc plate 93, and a fourth ring 96 is arranged on the inner edge of the middle position of the third ring 94.

[0049] Specifically, a double-layer Taylor ring packing is formed by fixing a third ring 94 in a circumferential array on both sides of the first ring 91. A single-layer Taylor ring packing is composed of many rings wound together. Because the gaps in the Taylor ring packing can hold a high amount of liquid, the residence time of the liquid in the tower can be longer, thereby increasing the contact time between the gas and liquid phases. By setting a double layer, the contact time between the gas and liquid phases is further increased, improving the mass transfer efficiency of the packing 9, thereby further enabling the gas and liquid phases to undergo sufficient absorption and neutralization reactions, further improving the absorption rate of inorganic waste gas, and thus further improving the filtration effect.

[0050] As a further embodiment of the present invention, a second ring 92 is symmetrically arranged on both sides of the first ring 91, and the second ring 92 is located on the outer edge of the third ring 94 and the middle part of the arc plate 93.

[0051] Furthermore, by setting the fourth ring 96 and the second ring 92, the liquid film area is further increased, improving the absorption rate of inorganic waste gas. At the same time, the structural characteristics of the packing 9 are strengthened, making the packing 9 more stable and less prone to deformation in the airflow.

[0052] As a further embodiment of the present invention, a frustum column 10 is fixedly provided at the central axis position of the packing frame 8, and an air chamber 101 and an air passage 102 are provided on the frustum column 10.

[0053] As a further embodiment of the present invention, the air inlet and air outlet of the air passage 102 are respectively connected to the air chamber 101 and the stacking area of ​​the packing 9. The air inlet of the air passage 102 is located at the lower end and is inclined along the tangent direction of the circular horizontal cross section of the air chamber 101.

[0054] Furthermore, since the air duct 102 is inclined upward in the vertical plane and inclined tangentially in the horizontal plane, part of the exhaust gas entering the spray tower 1 enters the air chamber 101 of the frustum column 10 and flows inclined upward from the center of the stacked packing 9 through the air duct 102, so that the airflow enters the stacked packing 9 from different directions, thereby generating different airflow directions, strengthening the irregular movement of the lightweight balls 95, and thus causing the packing 9 to produce stable vibration. This allows the adsorbed liquid film to carry the dust to collect and fall into the bottom of the spray tower 1 with the water flow, further avoiding the occurrence of blockage.

[0055] As a further embodiment of the present invention, an annular water pipe 7 is fixedly installed inside the spray tower 1, and nozzles are arranged in a circumferential array on the annular water pipe 7, with the spraying range of the nozzles covering the top layer of packing 9.

[0056] Specifically, due to the setting of the frustum column 10, and the fact that the cross-sectional area of ​​the frustum column 10 gradually decreases from bottom to top, the number of stacked packing 9 layers gradually increases from bottom to top. The set annular water pipe 7 can cover the top layer of packing 9. Due to the gradient setting, the liquid flow in the upper layer gradually converges to the lower layer, so that the liquid flow can pass smoothly through the stacked packing 9 and flow along the inner wall of the spray tower 1 to the bottom of the tower. This can flush and clean the inner wall of the spray tower 1, reduce the corrosion of the inner wall by inorganic waste gas, and thus extend the service life of the spray tower 1.

[0057] As a further embodiment of the present invention, a water tank 4 is connected to the annular water pipe 7, and a purifier 5 is connected between the water tank 4 and the spray tower 1.

[0058] Specifically, the first water pump draws the absorbent liquid from the water tank 4 into the annular water pipe 7 through a pipeline, and sprays it onto the packing material 9 through a nozzle. After the reaction, the absorbent liquid flows back to the bottom of the spray tower 1. The second water pump is then started to draw the absorbent liquid from the bottom of the tower into the purifier 5 for filtration, and then returns it to the water tank 4 for recycling, thereby achieving the economical use of the absorbent liquid.

[0059] As a further embodiment of the present invention, an air inlet pipe 6 is provided at the air inlet of the spray tower 1, and centrifugal blades are arranged in a circular array at the air outlet of the air inlet pipe 6.

[0060] Specifically, the exhaust gas enters the spray tower 1 through the inlet pipe 6. The exhaust gas passes through the centrifugal blades and drives the centrifugal blades to rotate, thereby generating centrifugal force to form a vortex, further avoiding the formation of turbulence, slowing down the speed of the airflow, and allowing the airflow to better contact and react with the stacked packing 9.

[0061] As a further embodiment of the present invention, activated carbon is provided inside the filter box 2.

[0062] Specifically, the activated carbon installed can adsorb and filter organic waste gases in the exhaust gas.

[0063] A method for using a chemical equipment exhaust gas filtration device includes the following steps:

[0064] S1: The exhaust gas is introduced into the spray tower 1 through the air inlet pipe 6. The exhaust gas forms a vortex and is decelerated by the centrifugal blades at the air outlet of the air inlet pipe 6.

[0065] S2: The first water pump passes the absorbent liquid in the water tank 4 into the annular water pipe 7 and sprays it onto the packing 9 through the nozzle. The absorbent liquid gradually seeps into the stacked packing 9 and forms a liquid film on the surface of the packing 9.

[0066] S3: Start the fan, and the exhaust gas flows from the bottom to the top of the spray tower 1. When passing through the packing 9, the inorganic exhaust gas in the exhaust gas comes into deep contact with the absorbent liquid on the surface of the packing 9, and a full absorption and neutralization reaction of the gas and liquid phases occurs, thereby filtering the inorganic exhaust gas in the exhaust gas.

[0067] S4: The pre-filtered exhaust gas enters the filter box 2 through the first pipe at the top of the spray tower 1. The activated carbon in the filter box 2 adsorbs and filters the organic waste gas in the exhaust gas.

[0068] S5: The gas that has undergone secondary filtration is discharged through exhaust pipe 3.

[0069] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A chemical equipment exhaust gas filtration device, characterized in that, include: A spray tower and a filter box are connected together. The spray tower is equipped with a packing frame, and multiple packing materials are stacked inside the packing frame. The packing includes a first ring, and arc-shaped plates are arranged in a circumferential array on both sides of the first ring. The arc-shaped plates on both sides are staggered so that the packing is hollow and spherical in shape. Lightweight small balls are arranged in the hollow part of the packing. The stacked packing filters the exhaust gas. As the exhaust gas flows from the lower packing to the upper packing, the arc plate divides the airflow in an exponential manner. The lightweight balls cause the airflow passing through the central gap of the packing to diffuse radially and change its direction, so that multi-directional airflow is generated inside the stacked packing and pushes the lightweight balls to produce irregular impact motion in the central gap of the packing. A third ring is fixedly arranged in a circular array on both sides of the first ring. The third ring is spaced apart from the arc plate. A fourth ring is arranged on the inner edge of the middle position of the third ring. The first ring is symmetrically provided with second rings on both sides, and the second rings are located on the outer edge of the third ring and the middle part of the arc plate; A frustum column is fixedly installed at the central axis of the packing frame, and an air chamber and an air passage are opened on the frustum column; The air inlet and outlet of the air passage are connected to the air chamber and the packing stack area, respectively. The air inlet of the air passage is located at the lower end and is inclined along the tangent direction of the circular horizontal cross section of the air chamber.

2. The chemical equipment exhaust gas filtration device according to claim 1, characterized in that, The spray tower is fixedly equipped with an annular water pipe, and the annular water pipe is equipped with spray nozzles arranged in a circumferential array, the spray range of which covers the top layer of packing.

3. The chemical equipment exhaust gas filtration device according to claim 2, characterized in that, The annular water pipe is connected to a water tank, and a purifier is connected between the water tank and the spray tower.

4. The chemical equipment exhaust gas filtration device according to claim 1, characterized in that, An air inlet pipe is provided at the air inlet of the spray tower, and centrifugal blades are arranged in a circumferential array at the air outlet of the air inlet pipe.

5. The chemical equipment exhaust gas filtration device according to claim 1, characterized in that, Activated carbon is installed inside the filter box.

6. A method of using a chemical equipment exhaust gas filtration device, comprising the chemical equipment exhaust gas filtration device according to any one of claims 1-5, characterized in that, Includes the following steps: S1: The exhaust gas is introduced into the spray tower through the inlet pipe. The exhaust gas forms a vortex and is slowed down by the centrifugal blades at the outlet of the inlet pipe. S2: The first water pump introduces the absorbent liquid from the water tank into the annular water pipe and sprays it onto the packing material through the nozzle. The absorbent liquid gradually seeps into the stacked packing material and forms a liquid film on the surface of the packing material. S3: Start the fan, and the exhaust gas flows from the bottom to the top of the spray tower. When passing through the packing, the inorganic exhaust gas in the exhaust gas comes into deep contact with the absorbent liquid on the surface of the packing, and a full absorption and neutralization reaction of the gas and liquid phases occurs, thereby filtering the inorganic exhaust gas in the exhaust gas. S4: The pre-filtered exhaust gas enters the filter box through the first pipe at the top of the spray tower. The activated carbon in the filter box adsorbs and filters the organic waste gas in the exhaust gas. S5: The gas that has undergone secondary filtration is discharged through the exhaust pipe.

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