Chemical equipment waste gas filtering device and method

Abstract

The invention discloses a chemical equipment waste gas filtering device and method, and belongs to the technical field of waste gas filtering, the chemical equipment waste gas filtering device comprises a spraying tower and a filtering box which are arranged in a communicating mode, a filler frame is arranged in the spraying tower, and a plurality of fillers are arranged in the filler frame in a stacked mode; the packing comprises a first circular ring, arc-shaped plates are arranged on the circular ring faces of the two sides of the first circular ring in a circumferential array mode, the arc-shaped plates on the two sides are arranged in a staggered mode so that the whole packing can be arranged in a hollow sphere-like mode, and small light balls are arranged at the hollow position in the packing. By arranging the filler, the arc-shaped plate and the light small balls, the absorption rate of inorganic waste gas can be effectively improved, so that the filtering effect is improved, the filler vibrates, an adsorbed liquid film is collected with dust and falls into the bottom of the spray tower along with water flow, blockage is not prone to occurring, frequent shutdown for cleaning is not needed, and the service life of the spray tower is prolonged. The continuity and stability of equipment operation are ensured, and the filtering efficiency is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas filtration, and particularly relates to a waste gas filtration device and method for chemical equipment. Background Art

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

[0003] In the prior art, Raschig rings, Pall rings, arc saddles, and rectangular saddles are all common choices for spray tower packings. However, the regular geometric shape leads to a single air flow path, short residence time and uneven distribution of waste gas in the packing layer, insufficient gas-liquid contact area. Especially when treating high-concentration inorganic waste gas, local reaction is prone to be insufficient, and the absorption efficiency is difficult to be further improved. When treating composite waste gas containing dust, the dust is easy to combine with the liquid film on the surface of the packing to form viscous deposits, gradually blocking the packing gaps, not only reducing the filtration efficiency, but also increasing the system pressure drop, and frequent shutdown for cleaning is required, seriously affecting the operation stability of the equipment. The liquid film on the surface of the static packing is prone to saturation or caking due to long-term retention, and it is difficult to effectively adsorb new pollutants through its own dynamic update, further exacerbating the packing blockage problem and affecting the continuity of waste gas treatment. Summary of the Invention

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

[0005] To achieve the above purpose, the present invention provides the following technical solution: A waste gas filtration device for chemical equipment, comprising:

[0006] A spray tower and a filtration box connected in communication. A packing rack is arranged inside the spray tower, and a plurality of packings are stacked inside the packing rack;

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

[0008] The stacked packings filter the waste gas. During the process of the waste gas flowing from the lower-layer packing to the upper-layer, the arc-shaped plates exponentially divide the passing air flow, and the lightweight balls make the air flow passing through the central void of the packing radiate and change the flow direction, so as to generate multi-directional air flow inside the stacked packings and push the lightweight balls to generate random impact motion inside the central void of the packing.

[0009] Preferably, third rings are fixedly arranged in a circumferential array on both ring surfaces on both sides of the first ring. The third rings are arranged at intervals from the arc-shaped plates, and a fourth ring is arranged at the inner edge at the middle position of the third rings.

[0010] Preferably, second rings are symmetrically arranged on both sides of the first ring. The second rings are located at the outer edges at the middle positions between the third rings and the arc-shaped plates.

[0011] Preferably, a frustum column is fixedly arranged at the central axis position of the packing rack. An air cavity and an air duct are provided on the frustum column.

[0012] Preferably, the air inlet and the air outlet of the air duct are respectively communicated with the air cavity and the packing stacking area. The air inlet of the air duct is at the low end and is inclined along the tangent direction of the circular horizontal section of the air cavity.

[0013] Preferably, an annular water pipe is fixedly arranged in the spray tower. Spray heads are arranged in a circumferential array on the annular water pipe. The spraying range of the spray heads covers the top-layer packing.

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

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

[0016] Preferably, activated carbon is arranged in the filter box.

[0017] A use method of an exhaust gas filtering device for chemical equipment comprises the following steps:

[0018] S1: Introduce the exhaust gas into the spray tower through the air inlet pipe. The exhaust gas forms a vortex and decelerates through the centrifugal blades at the air outlet of the air inlet pipe.

[0019] S2: A first water pump introduces the absorption liquid in the water tank into the annular water pipe and sprays it onto the packing through the spray heads. The absorption liquid gradually penetrates into the stacked packing and forms a liquid film on the surface of the packing.

[0020] S3: Start the fan. 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 makes in-depth contact with the absorption liquid on the surface of the packing, and sufficient absorption and neutralization reactions of the gas-liquid two phases occur, so as to filter the inorganic exhaust gas in the exhaust gas.

[0021] S4: The exhaust gas after preliminary filtration 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 exhaust gas in the exhaust gas.

[0022] S5: The gas that has been filtered twice is discharged through the exhaust stack.

[0023] In the above technical solution, a chemical equipment waste gas filtration device and method provided by the present invention have the following beneficial effects:

[0024] Through the provided packing, arc plates and lightweight balls, the stacked packing filters the waste gas. During the process of the waste gas flowing from the lower layer of packing to the upper layer, the arc plates exponentially divide the passing air flow and react and decelerate after each division, thus enabling a full 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 balls make the air flow passing through the central voids of the packing spread radially and change the flow direction, so as to generate multi-directional air flows inside the stacked packing and drive the lightweight balls to produce random impact movements within the central voids of the packing, causing the packing to vibrate. As a result, the adsorbed liquid film with dust gathers and falls into the bottom of the spray tower along with the water flow, enabling the stacked packing to directly filter the waste gas with dust and not easily become blocked, eliminating the need for frequent shutdowns for cleaning, ensuring the continuity and stability of equipment operation, and effectively improving the filtration efficiency. Description of the Drawings

[0025] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0026] Figure 1 Is the front perspective view provided by the embodiment of the present invention;

[0027] Figure 2 Is the right perspective view provided by the embodiment of the present invention;

[0028] Figure 3 Is the front sectional structure schematic diagram provided by the embodiment of the present invention;

[0029] Figure 4 Is the cross-sectional structure schematic diagram of the frustum provided by the embodiment of the present invention;

[0030] Figure 5 Is the three-dimensional structure schematic diagram of the packing provided by the embodiment of the present invention;

[0031] Figure 6 Is the exploded structure schematic diagram of the packing provided by the embodiment of the present invention;

[0032] Figure 7 Is the front sectional structure schematic diagram of the packing provided by the embodiment of the present invention;

[0033] Figure 8 Schematic diagram of the arrangement structure of the packing provided by the embodiment of the present invention;

[0034] Figure 9 Schematic diagram of the partial air flow direction structure of the packing provided by the embodiment of the present invention.

[0035] Explanation of reference numerals:

[0036] 1. Spray tower; 2. Filter box; 3. Exhaust pipe; 4. Water tank; 5. Purifier; 6. Inlet pipe; 7. Annular water pipe; 8. Packing rack; 9. Packing; 91. First ring; 92. Second ring; 93. Arc plate; 94. Third ring; 95. Lightweight ball; 96. Fourth ring; 10. Frustum column; 101. Air cavity; 102. Air duct. Detailed implementation manners

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

[0038] As Figures 1-9 shown, a waste gas filtering device for chemical equipment includes:

[0039] A spray tower 1 and a filter box 2 are connected in communication. A packing rack 8 is arranged inside the spray tower 1, and a packing 9 is filled inside the packing rack 8;

[0040] The packing 9 includes a first ring 91. Arc plates 93 are arranged in a circumferential array on both ring surfaces of the first ring 91, and the arc plates 93 on both sides are arranged in a staggered manner so that the whole packing 9 is arranged in a hollow spherical shape. A lightweight ball 95 is arranged in the hollow part inside the packing 9;

[0041] The stacked packings 9 filter the waste gas. During the process of the waste gas flowing from the lower-layer packing 9 to the upper layer, the arc plates 93 divide the passing air flow exponentially. The lightweight balls 95 make the air flow passing through the central void of the packing 9 diffuse radially and change the flow direction, so as to generate multi-directional air flows inside the stacked packings 9 and push the lightweight balls 95 to generate random impact movements inside the central void of the packing 9.

[0042] Specifically, when filtering the waste gas, the waste gas first passes through the spray tower 1 to filter the inorganic waste gas, then enters the filter box 2 through the first pipe at the top of the spray tower 1, filters the organic waste gas through the filter box 2, and then the waste gas after secondary filtration is extracted by a fan connected to the air outlet of the filter box 2 and discharged through an exhaust pipe 3 connected to the air outlet of the fan, thereby completing the filtration of the waste gas of the chemical equipment. Through secondary filtration, the organic matter and inorganic matter in the waste gas can be filtered, thereby improving the filtration effect.

[0043] Further, the waste gas is introduced into the spray tower 1 through the air inlet of the spray tower 1. At the same time, the absorption liquid is sprayed by the spray assembly arranged above the packing rack 8 into the packing 9 arranged and stacked in the packing rack 8. The absorption liquid gradually penetrates 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 absorption liquid on the surface of the packing 9, and a sufficient absorption and neutralization reaction of the gas-liquid two-phase occurs, thereby filtering the inorganic waste gas in the waste gas.

[0044] Further, when the air flow passes through the stacked packing 9, since the packing 9 includes a first ring 91, arc-shaped plates 93 are arranged in a circumferential array on both ring surfaces of the first ring 91, and the arc-shaped plates 93 on both sides are arranged in a staggered manner so that the whole packing 9 is arranged in a hollow spherical shape, as Figure 8 shown in the schematic diagram of the stacking of the packing 9. The packing 9 can be arranged in a corresponding layout for each layer of the packing 9, or the position of the upper layer of the packing 9 can be located at the arrangement gap between two adjacent lower layers of the packing 9, so that the positions of each layer of the packing 9 are arranged in a staggered manner. However, no matter which stacking arrangement method is used, the arc-shaped plates 93 at the bottom of the upper layer of the packing 9 and the arc-shaped plates 93 at the top of the lower layer of the packing 9 will be partially staggered, thereby generating an insertion effect. Thus, when the waste gas passes through the stacked packing 9, it first passes through the preliminary diversion of the arc-shaped plates 93 at the bottom of the first layer of the packing 9 and flows upward between two adjacent arc-shaped plates 93, and reacts with the liquid film on the surface of the arc-shaped plates 93 at the bottom of the first layer of the packing 9, thereby absorbing the inorganic waste gas in this air flow. At the same time, due to the frictional resistance of the surface of the arc-shaped plates 93 to the air flow, the air flow is preliminarily decelerated.

[0045] Furthermore, as the air flow moves upward and passes through the arc-shaped plates 93 at the top of the first layer of packing 9, since the arc-shaped plates 93 on both sides of the first ring 91 of the packing 9 are arranged in a staggered manner, the air flow between two adjacent arc-shaped plates 93 at the bottom of the packing 9 is divided again when passing through the arc-shaped plates 93 at the top of the packing 9. After converging with the divided air flow on the adjacent side, it continues to flow upward between the adjacent arc-shaped plates 93 at the top of the packing 9, reacts with the liquid film on the surface of the arc-shaped plates 93 at the top of the packing 9, and decelerates again, thereby performing a secondary reaction absorption on the doubly divided air flow, absorbing the waste gas that has undergone preliminary reaction absorption again, and further reducing the content of inorganic waste gas in the waste gas. Since there will be partial dislocation between the arc-shaped plates 93 at the bottom of the upper layer of packing 9 and the arc-shaped plates 93 at the top of the lower layer of packing 9 regardless of the stacking arrangement method, when the air flow passes through the first layer of packing 9 and enters the second layer of packing 9, the air flow is divided again by the arc-shaped plates 93 at the bottom of the second layer of packing 9. By analogy, the air flow is divided, converges, and then divided again, so that when the air flow passes through the stacked packings 9, the content of inorganic waste gas is first reduced and then divided again, converges with the divided air flow, reacts again, and decelerates, thereby further reducing the content of inorganic waste gas, so that the air flow is exponentially divided, reacts and decelerates after each division, and thus a sufficient absorption and neutralization reaction between the gas and liquid phases occurs, effectively improving the absorption rate of inorganic waste gas, thereby improving the filtration effect. At the same time, compared with the existing spherical packing, since the arc-shaped plates 93 are arranged in a staggered manner, not only the amount of arc-shaped plates 93 is reduced, thereby reducing the weight and manufacturing cost, but also the absorption effect on inorganic waste gas is better.

[0046] Furthermore, since the packing 9 is integrally arranged in a hollow spherical shape, lightweight balls 95 are arranged in the hollow part inside the packing 9. When the air flow passes through the central void of the packing 9, it first blows the lightweight balls 95 to move upward, and the arc-shaped plates 93 limit the lightweight balls 95, so that the lightweight balls 95 stop when moving to the top of the central void, and the air flow changes its flow direction when passing through the lightweight balls 95, causing the air flow to diffuse around the lightweight balls 95, react with the liquid film on the surface of the lightweight balls 95, and absorb the inorganic waste gas in the waste gas passing through the lightweight balls 95. The air flow with the changed flow direction after dispersion is divided by the arc-shaped plates 93. Part of the air flow converges with the air flow between two adjacent arc-shaped plates 93, and part of the air flow flows downward along the arc-shaped plates 93 to the next layer of packing 9 and flows to the lightweight balls 95 of the next layer of packing 9, as Figure 9 shown, thereby further improving the absorption rate of inorganic waste gas of the air flow passing through the central void of the packing 9, further improving the overall absorption rate of inorganic waste gas, and thus further improving the filtration effect.

[0047] Furthermore, the lightweight ball 95 is pushed by airflows from different directions, thus moving randomly in the central void of the packing 9, hitting the packing 9 at the central void of the packing 9, causing the packing 9 to vibrate. Since the waste gas contains dust, when passing through the packing 9, it will adsorb on the surface of the liquid film. As the dust accumulates, the gaps of the packing 9 will be blocked. Through the random impact movement of the lightweight ball 95, the packing 9 is vibrated, so that the adsorbed liquid film with dust converges and falls into the bottom of the spray tower 1 along with the water flow, enabling the stacked packing 9 to directly filter the waste gas with dust and not easily get blocked, without the need for frequent shutdown for cleaning, ensuring the continuity and stability of the equipment operation, and effectively improving the filtration efficiency.

[0048] As a further embodiment provided by the present invention, third rings 94 are fixedly arranged in a circumferential array on both circumferential surfaces of the first ring 91. The third rings 94 are spaced from the arc-shaped plates 93, and inner edges at the middle positions of the third rings 94 are provided with fourth rings 96.

[0049] Specifically, by fixedly arranging third rings 94 in a circumferential array on both circumferential surfaces of the first ring 91, a double-layer Taylor flower-ring packing is formed. A single-layer flower-ring packing is formed by winding many rings. Since there can be a relatively high liquid holdup in the voids of the flower-ring packing, the residence time of the liquid in the tower can be longer, thereby increasing the contact time between the gas-liquid two phases. By setting a double layer, the contact time between the gas-liquid two phases is further increased, the mass transfer efficiency of the packing 9 is improved, so that the gas-liquid two phases can further undergo sufficient absorption and neutralization reactions, further improving the absorption rate of the inorganic waste gas, and further improving the filtration effect.

[0050] As a further embodiment provided by the present invention, second rings 92 are symmetrically arranged on both sides of the first ring 91. The second rings 92 are located at the outer edges at the middle positions between the third rings 94 and the arc-shaped plates 93.

[0051] Furthermore, by setting the fourth rings 96 and the second rings 92, the liquid film area is further increased, the absorption rate of the inorganic waste gas is improved. At the same time, the structural characteristics of the packing 9 can be strengthened, making the packing 9 more stable and not easily deformed in the airflow.

[0052] As a further embodiment provided by the present invention, a frustum column 10 is fixedly arranged at the central axis position of the packing rack 8. An air cavity 101 and an air duct 102 are provided on the frustum column 10.

[0053] As a further embodiment provided by the present invention, the air inlet and the air outlet of the air duct 102 are respectively communicated with the air cavity 101 and the stacked area of the packing 9. The air inlet of the air duct 102 is at the low end and is inclined along the tangent direction of the circular horizontal section of the air cavity 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 waste gas entering the spray tower 1 enters the air cavity 101 of the frustum column 10 and diffuses upward and obliquely from the central position of the stacked packing 9 through the air duct 102, so that the air flow enters the stacked packing 9 from different directions, thereby generating different air flow directions, strengthening the irregular movement of the light balls 95, and thus causing the packing 9 to vibrate stably. This enables the adsorbed liquid film to carry dust and converge and fall into the bottom of the spray tower 1 along with the water flow, further avoiding the occurrence of blockage phenomena.

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

[0056] Specifically, due to the setting of the frustum column 10, and the cross-sectional area of the frustum column 10 gradually decreases from the bottom to the top, the number of layers of the stacked packing 9 stacked from the bottom to the top gradually increases. The annular water pipe 7 can cover the top-layer 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 smoothly pass through the stacked packing 9 and flow along the inner wall of the spray tower 1 to the bottom of the tower, thereby being able to wash and clean the inner wall of the spray tower 1, reducing the corrosion of the inner wall by inorganic waste gas, and thus prolonging the service life of the spray tower 1.

[0057] As a further embodiment provided by the present invention, the annular water pipe 7 is communicated with a water tank 4, and a purifier 5 is communicated between the water tank 4 and the spray tower 1.

[0058] Specifically, the first water pump passes the absorption liquid in the water tank 4 into the annular water pipe 7 through a pipeline and sprays it onto the packing 9 through the spray nozzles. The absorption liquid after the reaction flows back to the bottom of the spray tower 1. The second water pump is started to pass the absorption liquid at the bottom of the tower into the purifier 5 for filtration, and then recycled back into the water tank 4 for cyclic use, thereby realizing the economical use of the absorption liquid.

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

[0060] Specifically, the waste gas enters the spray tower 1 through the air inlet pipe 6, and the waste gas passes through the centrifugal blades and drives the centrifugal blades to rotate, so that the air flow generates a centrifugal force to form a vortex, further avoiding the formation of turbulence, slowing down the speed of the air flow, and enabling the air flow to better contact and react with the stacked packing 9.

[0061] As a further embodiment provided by the present invention, activated carbon is arranged in the filter box 2.

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

[0063] A method for using an exhaust gas filtering device of chemical equipment includes the following steps:

[0064] S1: Pass the waste gas into the spray tower 1 through the intake pipe 6. The waste gas forms a vortex and decelerates through the centrifugal blades at the outlet of the intake pipe 6.

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

[0066] S3: Start the fan. 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 makes in-depth contact with the absorption liquid on the surface of the packing 9, and sufficient absorption and neutralization reactions of the gas-liquid two phases occur, thereby filtering the inorganic waste gas in the waste gas.

[0067] S4: The waste gas that has been preliminarily filtered 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 waste gas.

[0068] S5: The gas that has been secondarily filtered is discharged through the exhaust pipe 3.

[0069] Only some exemplary embodiments of the present invention have been described by way of illustration above. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above 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 waste gas filtering device, characterized in that: include: A spray tower and a filter box are connected, wherein a packing rack is arranged inside the spray tower, and a plurality of packings are stacked inside the packing rack; The filler comprises a first circular ring, and arc plates are arranged in a circumferential array on both sides of the circular ring surface of the first circular ring, and the arc plates on both sides are staggered so that the filler is arranged in a hollow spherical shape as a whole, and lightweight small balls are arranged in the hollow part inside the filler; The stacked fillers filter the exhaust gas. When the exhaust gas flows from the lower layer of fillers to the higher layer, the arc plate divides the passing airflow exponentially. The lightweight balls make the airflow passing through the central gap of the fillers diffuse radially and change the flow direction, so that multi-directional airflow is generated inside the stacked fillers and the lightweight balls are pushed to produce irregular impact motion in the central gap of the fillers.

2. A chemical equipment waste gas filtering device according to claim 1, characterized in that: Third circular rings are fixedly arranged in a circular array on the circular surfaces on both sides of the first circular ring. The third circular rings are spaced apart from the arc-shaped plates. A fourth circular ring is arranged on the inner edge of the middle portion of the third circular ring.

3. A chemical equipment waste gas filtering device according to claim 2, characterized in that: The second circular rings are symmetrically arranged on both sides of the first circular ring, and the second circular rings are located at the outer edge of the middle position between the third circular ring and the arc plate.

4. A chemical equipment waste gas filtering device according to claim 3, characterized in that: A truncated cone column is fixedly arranged at the center axis position of the packing frame, and an air cavity and an air passage are opened on the truncated cone column.

5. A chemical equipment waste gas filtering device according to claim 4, characterized in that: The air inlet and the air outlet of the air channel are respectively connected to the air cavity and the filler stacking area. The air inlet of the air channel is at the low end and is inclined along the tangent direction of the circular horizontal cross-section of the air cavity.

6. A chemical equipment waste gas filtering device according to claim 5, characterized in that: An annular water pipe is fixedly arranged in the spray tower, and nozzles are arranged in a circular array on the annular water pipe. The spraying range of the nozzles covers the top layer of fillers.

7. The exhaust gas filtering device for chemical equipment according to claim 1, characterized in that: The annular water pipe is connected with a water tank, and a purifier is connected with the water tank and the spray tower.

8. The exhaust gas filtering device for chemical equipment according to claim 1, characterized in that: An air inlet pipe is arranged 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.

9. The exhaust gas filtering device for chemical equipment according to claim 1, characterized in that: Activated carbon is arranged in the filter box.

10. A method for using a chemical equipment waste gas filtering device, comprising a chemical equipment waste gas filtering device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: The exhaust gas is introduced into the spray tower through the air inlet pipe, and the exhaust gas passes through the centrifugal blades at the air outlet of the air inlet pipe to form a vortex and decelerate; S2: The first water pump passes the absorption liquid in the water tank into the annular water pipe and sprays it to the packing through the nozzle. The absorption liquid gradually penetrates into the stacked packing and forms a layer of liquid film on the surface of the packing; S3: Start the fan, and the exhaust gas flows from the bottom to the top of the spray tower. When passing through the filler, the inorganic exhaust gas in the exhaust gas deeply contacts with the absorption liquid on the surface of the filler, and the gas-liquid two-phase full absorption and neutralization reaction occurs, thereby filtering the inorganic exhaust gas in the exhaust gas; S4: The preliminarily filtered waste gas enters the filter box 2 through the first pipe at the top of the spray tower, and the activated carbon in the filter box absorbs and filters the organic waste gas in the waste gas; S5: The gas after secondary filtration is discharged through the exhaust pipe.

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