Acid mist absorption tower exhaust device and industrial waste gas treatment system.

Abstract

This utility model discloses an exhaust device for an acid mist absorption tower and an industrial waste gas treatment system incorporating it, comprising: an absorption tower body, an exhaust hood, an anti-backflow component disposed within the exhaust hood, and a bird-proof component connected to the outlet end of the exhaust hood. The absorption tower body is also connected to an inlet pipe and an exhaust pipe. The exhaust hood is connected to the outlet end of the exhaust pipe and communicates with the exhaust pipe to form an exhaust channel for the acid mist after water washing to be discharged outward. The anti-backflow component is disposed within the exhaust channel to open the exhaust channel to discharge the acid mist under the force of the exhaust airflow formed by the outward discharge of acid mist, and to close the exhaust pipe to prevent external air or pollutants from flowing back into the absorption tower body when there is no exhaust airflow. This novel device allows waste gas to be discharged unidirectionally through the exhaust channel, and automatically closes the exhaust channel when there is no airflow pressure, solving the problem of airflow backflow in the prior art; at the same time, the addition of the bird-proof component solves the problem of existing bird nesting and blockage.

Description

Technical Field

[0001] This utility model relates to the technical field of acid mist treatment devices, and in particular, to an exhaust device for an acid mist absorption tower. Furthermore, this utility model also relates to an industrial waste gas treatment system including the aforementioned exhaust device for an acid mist absorption tower. Background Technology

[0002] Exhaust systems are key equipment in industrial waste gas treatment systems. They are mainly used to discharge or recycle pollutants such as harmful gases, dust, and acid mist generated during production, ensuring a safe working environment and compliance with environmental standards. Common exhaust systems include fans, ducts, purification towers, and exhaust hoods. They need to be corrosion-resistant, have good sealing properties, and be clogging-resistant to meet the waste gas treatment needs of different industrial scenarios.

[0003] However, traditional exhaust systems may face problems such as backflow of air and blockage caused by birds nesting during the waste gas treatment process, affecting the stability of the equipment and the purification efficiency.

[0004] Therefore, a new exhaust system needs to be designed to solve the above-mentioned technical problems. Utility Model Content

[0005] This utility model provides an exhaust device for an acid mist absorption tower and an industrial waste gas treatment system thereon, in order to solve the technical problems that traditional exhaust devices may face during the waste gas treatment process, such as backflow of airflow and blockage by birds nesting, which in turn affect the stability of the equipment and the purification efficiency.

[0006] The technical solution adopted in this utility model is as follows:

[0007] An exhaust device for an acid mist absorption tower includes: an absorption tower body for washing acid mist with water, an exhaust hood for guiding the acid mist after washing to be discharged, an anti-backflow component installed inside the exhaust hood, and a bird-proof component connected to the outlet end of the exhaust hood to prevent birds from entering the exhaust hood; the absorption tower body is also connected to an air inlet pipe for introducing acid mist for washing with water, and an exhaust pipe for discharging the acid mist after washing to the outside; the exhaust hood is connected to the outlet end of the exhaust pipe and communicates with the exhaust pipe to form an exhaust channel for discharging the acid mist after washing to the outside; the anti-backflow component is installed in the exhaust channel to open the exhaust channel to discharge acid mist under the force of the exhaust airflow formed by the outward discharge of acid mist, and to close the exhaust pipe to prevent external air or pollutants from flowing back into the absorption tower body when there is no exhaust airflow.

[0008] Furthermore, the anti-backflow component includes an anti-backflow member having a rotating shaft and a flap; the rotating shaft is horizontally arranged and rotatably mounted inside one side of the exhaust hood; the first end of the flap is fixedly inserted through the outer circle of the rotating shaft, and the second end of the flap is used to abut against and limit the other side wall of the exhaust hood, so that the flap is arranged laterally to block the exhaust passage when no exhaust airflow passes through, and the flap is flipped upward about the center of the rotating shaft as the rotation axis to open the exhaust passage when the exhaust airflow passes through.

[0009] Furthermore, each of the two opposite side walls inside the exhaust hood is provided with a recessed mounting groove, and a self-lubricating bearing with self-lubricating properties is installed in the mounting groove. The side wall inside the exhaust hood is also provided with a sealing plate for closing the mounting groove. The rotating shaft is horizontally set inside the exhaust hood, and the two ends of the rotating shaft are respectively connected to the self-lubricating bearing after passing through the sealing plate on the corresponding side.

[0010] Furthermore, the anti-backflow component also includes a stop block formed by the outward protrusion of the inner wall of the exhaust hood or fixed to the inner wall of the exhaust hood, the stop block being provided at the second end of the flap; the flap is used to abut against the stop block for support and limitation during the flipping process of its second end toward the inside of the exhaust hood.

[0011] Furthermore, the anti-backflow component also includes an acid-resistant sealing strip connected to the outer periphery of the flap to seal the gap between the flap and the inner wall of the exhaust hood when the flap is supported on the baffle.

[0012] Furthermore, the number of anti-backflow components is multiple sets, and these multiple sets of anti-backflow components are arranged sequentially and at intervals along the direction from the air inlet end to the air outlet end of the exhaust hood.

[0013] Furthermore, the rotating shaft of each anti-backflow component is staggered left and right in the direction of the arrangement of multiple anti-backflow components.

[0014] Furthermore, the bird-proof component includes two sets of mounting brackets connected to opposite sides of the exhaust hood outlet end, and a detachable bird-proof grille connected between the two sets of mounting brackets; the bird-proof grille is arranged parallel to the exhaust hood outlet end to prevent birds from entering the exhaust hood.

[0015] Furthermore, each set of mounting brackets includes a fixing block that is fixed to the edge of the exhaust hood outlet, and a mounting strip that is fixed to the top of the fixing block. The first end of the mounting strip extends inward in the length direction to form a groove. One side of the groove is connected to the side wall surface of the mounting strip in the length direction. The second end of the groove has a protruding locking block. The bird-proof grille has a recessed locking groove on each side in the width direction. The two edges of the bird-proof grille in the width direction are slidably inserted into the two grooves by the first ends of the two mounting strips, until the two locking grooves on the bird-proof grille are respectively engaged with the two locking blocks in the two mounting strips, so as to realize the detachable installation of the bird-proof grille and the two sets of mounting brackets.

[0016] According to another aspect of the present invention, an industrial waste gas treatment system is also provided, having an exhaust device for an acid mist absorption tower as described in any of the above.

[0017] This utility model has the following beneficial effects:

[0018] Compared with existing technologies, the advantages and positive effects of the exhaust device of this utility model are as follows: By installing an anti-backflow component in the exhaust duct, the airflow pressure causes the anti-backflow component to automatically open the exhaust duct, allowing the exhaust gas to be discharged outward in only one direction. At the same time, when there is no airflow pressure, the anti-backflow component automatically closes the exhaust duct, thereby preventing external air or pollutants from flowing back into the exhaust hood and finally into the absorption tower body, solving the problem of airflow backflow in existing technologies and improving the stability of equipment operation. In addition, a bird-proof component is added to the exhaust outlet of the exhaust hood to prevent external birds from entering the exhaust hood through the outlet or nesting and blocking the outlet of the exhaust hood, solving the existing technical problem of bird nesting and blockage, and improving the acid mist purification efficiency.

[0019] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 This is a schematic diagram of an exhaust device for an acid mist absorption tower according to a preferred embodiment of the present invention.

[0022] Figure 2 for Figure 1 Schematic diagram of the cross-sectional main view of the central exhaust hood;

[0023] Figure 3 for Figure 2 A schematic diagram showing the working status of the anti-backflow component when exhaust airflow passes through the central exhaust hood;

[0024] Figure 4 for Figure 1 Schematic diagram of the spatial structure of the bird-proof grating;

[0025] Figure 5 for Figure 1 A schematic diagram of the spatial structure of the fixed bracket.

[0026] Legend:

[0027] 1. Absorption tower body;

[0028] 2. Air inlet duct; 3. Air outlet duct; 4. Air outlet hood;

[0029] 5. Anti-backflow assembly; 501. Rotating shaft; 502. Flip plate; 503. Stop block;

[0030] 6. Bird-proof components; 601. Fixing block; 602. Bird-proof grille; 603. Slide groove; 604. Card slot; 605. Card block; 606. Mounting strip. Detailed Implementation

[0031] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0032] Reference Figure 1 A preferred embodiment of this utility model provides an exhaust device for an acid mist absorption tower, comprising: an absorption tower body 1 for washing acid mist with water, an exhaust hood 4 for guiding the discharged acid mist after water washing, an anti-backflow component 5 disposed within the exhaust hood 4, and a bird-proof component 6 connected to the outlet end of the exhaust hood 4 to prevent birds from entering the exhaust hood 4. The absorption tower body 1 is also connected to an air inlet pipe 2 for introducing acid mist for water washing, and an exhaust pipe 3 for discharging the washed acid mist outwards. The exhaust hood 4 is connected to the outlet end of the exhaust pipe 3 and communicates with the exhaust pipe 3 to form an exhaust channel for discharging the washed acid mist outwards. The anti-backflow component 5 is disposed within the exhaust channel to open the exhaust channel to discharge acid mist under the force of the exhaust airflow formed by the outward discharge of acid mist, and to close the exhaust pipe 3 to prevent external air or pollutants from flowing back into the absorption tower body 1 when there is no exhaust airflow.

[0033] When the exhaust device of this utility model is working, the acid mist generated by pickling is drawn into the air inlet pipe 2 by the fan and sent to the absorption tower body 1. A water storage tank is set at the bottom of the absorption tower body 1, and the air inlet pipe 2 extends into the water storage tank. The acid mist first comes into contact with the solution in the water storage tank to achieve the effect of pre-absorption. At the same time, after the acid mist is washed with water, most of the dust or particulate matter contained in it will also be dissolved. After passing through the water storage tank, the acid mist flows upward to further neutralize and purify the acid mist. The purified acid mist is discharged into the exhaust hood 4 through the exhaust pipe 3. At this time, the anti-backflow component 5 is activated by the airflow to open the exhaust channel, and the airflow can be discharged outward through the exhaust channel. After the airflow is discharged, the anti-backflow component 5 closes the exhaust channel again to protect the exhaust hood 4 and prevent pollutants from flowing back into the absorption tower body 1. At the same time, a bird-proof component 6 is set at the outlet end of the exhaust hood 4 to prevent external birds from entering the exhaust hood 4.

[0034] Compared with the prior art, the advantages and positive effects of the exhaust device of this utility model are as follows: By setting an anti-backflow component 5 in the exhaust channel, the airflow pressure causes the anti-backflow component 5 to activate and automatically open the exhaust channel, allowing the exhaust gas to be discharged outward in only one direction through the exhaust channel. At the same time, when there is no airflow pressure, the anti-backflow component 5 automatically activates to close the exhaust channel, thereby preventing external air or pollutants from flowing back into the exhaust hood 4 and finally into the absorption tower body 1, solving the problem of airflow backflow in the prior art and improving the stability of equipment operation. At the same time, a bird-proof component 6 is added to the exhaust outlet of the exhaust hood 4 to prevent external birds from entering the exhaust hood 4 through the outlet of the exhaust hood 4 or building nests and blocking the outlet of the exhaust hood 4, solving the existing technical problem of bird nesting and blocking, and improving the acid mist purification efficiency.

[0035] In this optional solution, such as Figure 1 As shown, the air inlet pipe 2 is connected to the bottom of the absorption tower body 1 so as to extend into the water storage tank inside the absorption tower body 1; the exhaust pipe 3 is connected to the top of the absorption tower body 1, and an exhaust hood 4 is installed at the top of the exhaust pipe 3. An anti-backflow component 5 is installed inside the exhaust hood 4, and a bird-proof component 6 is installed at the top of the exhaust hood 4.

[0036] Optionally, such as Figure 2 and Figure 3 As shown, the anti-backflow assembly 5 includes an anti-backflow member having a rotating shaft 501 and a flap 502. The rotating shaft 501 is horizontally arranged and rotatably mounted inside one side of the exhaust hood 4. The first end of the flap 502 is fixedly inserted through the outer circle of the rotating shaft 501, and the second end of the flap 502 is used to abut and limit the movement against the other side wall of the exhaust hood 4, so that the flap 502 is arranged laterally to block the exhaust passage when no exhaust airflow passes through, and the flap 502 is flipped upward about the center of the rotating shaft 501 to open the exhaust passage when exhaust airflow passes through.

[0037] In this optional solution, to prevent the rotating shaft 501 from corroding and jamming, thus affecting the flipping function of the flap 502, the present invention provides recessed mounting grooves on two opposite side walls inside the exhaust hood 4. Self-lubricating bearings are installed in the mounting grooves, and sealing plates are also provided on the side walls inside the exhaust hood 4 to close the mounting grooves. The rotating shaft 501 is horizontally positioned inside the exhaust hood 4, and both ends of the rotating shaft 501 are connected to the self-lubricating bearings after passing through the corresponding sealing plates.

[0038] In this optional solution, such as Figure 2 As shown, the anti-backflow component also includes a stop block 503 formed by the outward protrusion of the inner wall of the exhaust hood 4 or fixed to the inner wall of the exhaust hood 4. The stop block 503 is provided at the second end of the flap 502. The flap 502 is used to abut against the stop block 503 and support and limit the flap 502 during the flipping process of its second end toward the inside of the exhaust hood 4.

[0039] In this optional solution: a rotatable flap 502 is installed in the exhaust duct, which automatically adjusts its opening and closing based on airflow pressure, while simultaneously being limited by a stop block 503. When there is no airflow, the flap 502 is supported by its own weight on the rotating shaft 501 and the stop block 503, with its second end resting against the upper limit of the stop block 503, thus closing the exhaust duct. During exhaust, the acid mist airflow rotates the flap 502, ensuring that the exhaust gas is discharged outwards in only one direction through the exhaust duct, thereby preventing external air or pollutants from flowing back into the absorption tower body 1.

[0040] Preferably, the anti-backflow component also includes an acid-resistant sealing strip connected to the outer periphery of the flap 502, which is used to seal the gap between the flap 502 and the inner wall of the exhaust hood 4 when the flap 502 is supported on the baffle 503, thereby improving the sealing effect of the exhaust channel and further preventing external air or pollutants from entering the absorption tower body 1 through the exhaust channel. At the same time, the acid-resistant rubber sealing strip can enhance corrosion resistance, thereby extending the service life of the device.

[0041] Preferably, in order to achieve multi-level protection of the anti-backflow component 5 and thus improve the sealing effect of the exhaust channel when there is no airflow, in the preferred embodiment of this utility model, the number of anti-backflow components is multiple sets, and the multiple sets of anti-backflow components are arranged sequentially and at intervals along the direction from the air inlet end to the air outlet end of the exhaust hood 4. In a specific embodiment of this preferred solution, as shown... Figure 2 and Figure 3 As shown, there are two sets of anti-backflow components. Two flaps 502 in the two sets of anti-backflow components are fixedly connected to the surfaces of the two sets of rotating shafts 501. In this specific embodiment, two sets of flaps 502 are provided, and the two sets of flaps 502 are respectively connected to the surfaces of the two sets of rotating shafts 501. When the airflow pushes up the flaps 502, the flaps 502 can rotate around the central axis of the rotating shafts 501, thereby achieving the exhaust effect.

[0042] Furthermore, to improve the protective effect, in an optional embodiment, the upper flap 502 is made of lightweight aluminum alloy, while the lower flap 502 is made of rubber-lined counterweight steel plate. The lightweight aluminum alloy material of the upper flap 502 prevents large particles from falling in, while the rubber-lined counterweight steel plate material of the lower flap 502 prevents rainwater from entering the absorption tower body 1 through the exhaust channel, thereby improving sealing. In this further embodiment, the flap 502 adopts a layered design of lightweight aluminum alloy and rubber-lined counterweight steel plate, balancing sensitivity and sealing while reducing mechanical wear.

[0043] Preferably, the rotating shaft 501 of each anti-backflow component is staggered left and right in the arrangement direction of the multiple anti-backflow components. In this preferred embodiment, to avoid interference between multiple flaps 502, in an optional embodiment, the rotating shaft 501 of each anti-backflow component is staggered left and right in the arrangement direction of the multiple anti-backflow components. When the airflow pushes open the flap 502, the multiple flaps 502 can rotate on their respective rotating shaft centerlines, avoiding the influence of multiple rotating shafts 501 installed on the same side on the rotation of the flaps 502.

[0044] Optionally, such as Figure 1 As shown, the bird-proof component 6 includes two sets of mounting brackets connected to opposite sides of the outlet end of the exhaust hood 4, and a detachable bird-proof grille 602 connected between the two sets of mounting brackets. The bird-proof grille 602 is positioned parallel to the outlet end of the exhaust hood 4 to prevent birds from entering the exhaust hood 4. In this optional embodiment, the bird-proof grille 602 is detachably fixed to the two sets of mounting brackets, which allows for quick assembly and disassembly of the bird-proof grille 602, blocks birds from entering, and facilitates maintenance and cleaning.

[0045] In this optional solution, such as Figure 4 and Figure 5 As shown, each set of mounting brackets includes a fixing block 601 that is fixed to the edge of the exhaust hood 4 outlet end, and a mounting strip 606 fixed to the top of the fixing block 601. The first end of the mounting strip 606 extends concavely in the length direction to form a groove 603. One side of the groove 603 is connected to the side wall surface of the mounting strip 606 in the length direction. The second end of the groove 603 has a protruding locking block 605. The bird-proof grille 602 has concave locking grooves 604 on both sides in the width direction. The two edges of the bird-proof grille 602 in the width direction are slidably inserted into the two grooves 603 by the first ends of the two mounting strips 606, until the two locking grooves 604 on the bird-proof grille 602 are respectively engaged with the two locking blocks 605 in the two mounting strips 606, so as to realize the detachable installation of the bird-proof grille 602 and the two sets of mounting brackets. In this optional solution, the sliding grooves 603 on the two mounting strips 606 facilitate the relative clamping of the bird-proof grille 602, while limiting and guiding the insertion of the bird-proof grille 602; and the cooperation of two sets of slots 604 and two sets of blocks 605 enables the quick assembly and disassembly of the bird-proof grille 602 from the mounting bracket.

[0046] The working principle of this novel device is as follows: Acid mist generated during pickling is drawn into the inlet pipe 2 by a fan and sent to the absorption tower body 1. A water storage tank is located at the bottom of the absorption tower body 1. Since the inlet pipe 2 extends into the water storage tank, the acid mist first contacts the solution in the water storage tank, achieving a pre-absorption effect. Simultaneously, after water washing, most of the dust or particulate matter contained within the acid mist is dissolved. After passing through the water storage tank, the acid mist flows upward, further neutralizing and purifying it. The purified acid mist is then discharged into the exhaust hood 4 through the exhaust pipe 3. At this time, the flap 502, under the action of airflow, rotates around the center line of the rotating shaft 501. Subsequently, the exhaust channel in the exhaust hood 4 is opened, allowing airflow to be discharged outwards through the exhaust channel. After the airflow is completely discharged, the flap 502, under its own gravity... Use the reverse rotation until the bottom of the flap 502 contacts the stop block 503. At this time, the exhaust channel is closed, which can protect the exhaust hood 4 and prevent pollutants from flowing back into the absorption tower body 1. At the same time, a bird-proof grid plate 602 is set at the outlet of the exhaust hood 4. When it is necessary to remove the bird-proof grid plate 602, slide the bird-proof grid plate 602. The bird-proof grid plate 602 slides in the slide groove 603. At this time, the locking block 605 and the locking groove 604 separate. The bird-proof grid plate 602 can be completely pulled out for removal. When installing the bird-proof grid plate 602, push the bird-proof grid plate 602 into the slide groove 603 until the bird-proof grid plate 602 enters the innermost part of the slide groove 603. At this time, the locking block 605 re-locks into the locking groove 604, and the bird-proof grid plate 602 can be fixed.

[0047] A preferred embodiment of this utility model also provides an industrial waste gas treatment system, which has an exhaust device for an acid mist absorption tower as described above. Therefore, the industrial waste gas treatment system of this utility model allows the waste gas after water washing to be discharged outward in only one direction through the exhaust channel. At the same time, the exhaust channel is closed when there is no airflow pressure to prevent external air or pollutants from flowing back into the exhaust hood 4, thus solving the problem of airflow backflow in the prior art and improving the stability of equipment operation. In addition, by adding a bird-proof component 6, it is used to prevent external birds from entering the exhaust hood 4 through the outlet of the exhaust hood 4 or from nesting and blocking the outlet of the exhaust hood 4, thus solving the existing technical problem of bird nesting and blocking and improving the acid mist purification efficiency.

[0048] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An exhaust device for an acid mist absorption tower, characterized by comprising: include: The absorption tower body (1) for washing acid mist with water, the exhaust hood (4) for guiding the acid mist after washing to be discharged, the anti-backflow component (5) installed in the exhaust hood (4), and the bird-proof component (6) connected to the outlet end of the exhaust hood (4) to prevent birds from entering the exhaust hood (4). The absorption tower body (1) is also connected to an air inlet pipe (2) for introducing acid mist for water washing, and an air outlet pipe (3) for discharging the acid mist after water washing. The exhaust hood (4) is connected to the outlet end of the exhaust pipe (3) and is connected to the exhaust pipe (3) to form an exhaust channel for the acid mist after water washing to be discharged outward; The anti-backflow component (5) is installed in the exhaust channel to open the exhaust channel to discharge acid mist under the force of the exhaust airflow formed by the acid mist being discharged outward, and to close the exhaust pipe (3) to prevent external air or pollutants from flowing back into the absorption tower body (1) when there is no exhaust airflow.

2. The exhaust device for the acid mist absorption tower according to claim 1, characterized in that, The anti-backflow assembly (5) includes an anti-backflow member having a pivot (501) and a flap (502); The rotating shaft (501) is horizontally set and rotatably mounted inside one side of the exhaust hood (4); The first end of the flap (502) is fixedly inserted on the outer circle of the rotating shaft (501), and the second end of the flap (502) is used to abut against the other side wall of the exhaust hood (4) for limiting, so that the flap (502) is arranged laterally to block the exhaust channel when there is no exhaust airflow, and the flap (502) is flipped upward with the center of the rotating shaft (501) as the rotation axis to open the exhaust channel when the exhaust airflow passes through.

3. The exhaust device for the acid mist absorption tower according to claim 2, characterized in that, The exhaust hood (4) has two opposite side walls with recessed mounting grooves, and self-lubricating bearings with self-lubricating properties are installed in the mounting grooves. The side walls of the exhaust hood (4) also have sealing plates for closing the mounting grooves. The rotating shaft (501) is horizontally installed inside the exhaust hood (4), and the two ends of the rotating shaft (501) are respectively connected to the self-lubricating bearing after passing through the corresponding side sealing plates.

4. The exhaust device for the acid mist absorption tower according to claim 2, characterized in that, The backflow prevention component also includes a baffle (503) formed by the outward protrusion of the inner wall of the exhaust hood (4) or fixed on the inner wall of the exhaust hood (4), and the baffle (503) is provided at the second end of the flap (502); The flap (502) is used to abut against the stop (503) and limit its movement as it flips toward the inside of the exhaust hood (4) at its second end.

5. The exhaust device for the acid mist absorption tower according to claim 4, characterized in that, The anti-backflow component also includes an acid-resistant sealing strip connected to the outer periphery of the flap (502) to seal the gap between the flap (502) and the inner wall of the exhaust hood (4) when the flap (502) is supported on the block (503).

6. The exhaust device for the acid mist absorption tower according to claim 4, characterized in that, The number of anti-backflow components is multiple sets, and the multiple sets of anti-backflow components are arranged sequentially at intervals along the direction from the air inlet end to the air outlet end of the exhaust hood (4).

7. The exhaust device for the acid mist absorption tower according to claim 6, characterized in that, The rotating shaft (501) of each anti-backflow component is staggered left and right in the direction of the arrangement of multiple anti-backflow components.

8. The exhaust device for the acid mist absorption tower according to claim 1, characterized in that, The bird-proof component (6) includes two sets of mounting brackets connected to opposite sides of the outlet end of the exhaust hood (4), and a bird-proof grille (602) detachably connected between the two sets of mounting brackets; The bird-proof grille (602) is provided at the outlet end of the parallel exhaust hood (4) to prevent birds from entering the exhaust hood (4).

9. The exhaust device for the acid mist absorption tower according to claim 8, characterized in that, Each set of mounting brackets includes a fixing block (601) that is fixed to the edge of the outlet end of the exhaust hood (4), and a mounting strip (606) that is fixed to the top of the fixing block (601). The first end of the mounting strip (606) in the length direction extends inward to form a groove (603). One side of the groove (603) is connected to the side wall surface in the length direction of the mounting strip (606). The second end of the groove (603) has a protruding locking block (605). The bird-proof grille (602) has recessed slots (604) on both sides in the width direction. The two edges of the bird-proof grille (602) in the width direction are slidably inserted into the two sliding grooves (603) by the first ends of the two mounting strips (606) until the two slots (604) on the bird-proof grille (602) are respectively engaged with the two locking blocks (605) in the two mounting strips (606), so as to realize the detachable installation of the bird-proof grille (602) and the two sets of mounting brackets.

10. An industrial exhaust gas treatment system, characterized by, It has an exhaust device for an acid mist absorption tower as described in any one of claims 1-9.

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