Absorbed chlorine recycling device for acidic etching copper

Abstract

The invention discloses an absorbed chlorine recycling device for acidic etching copper, and relates to the technical field of chlorine recycling, the absorbed chlorine recycling device comprises a tower body and a uniform distribution assembly, one side of the tower body is provided with a gas inlet pipe, and the uniform distribution assembly is arranged at one end, located in the tower body, of the gas inlet pipe; the uniform distribution assembly comprises an outer cover, a uniform distribution cavity, an air outlet, a liquid collecting tank, a liquid outlet, a liquid discharge port, a uniform distribution impeller and a waterproof film, the end, located in the tower body, of the air inlet pipe is connected with the outer cover, and the uniform distribution cavity is formed in the outer cover. When the device is used, waste gas fed into the tower body can be subjected to gas-liquid separation, and the waste gas is uniformly distributed in the separation process, so that the contact surface of the waste gas and absorption liquid is increased, chlorine is fully absorbed, the chlorine content in the tail gas can be detected when the tail gas absorbing the chlorine is dehumidified before being discharged, and the chlorine content in the tail gas is detected. If the residual chlorine is too much, the tail gas can be refluxed and absorbed again, and the absorption liquid is synchronously treated, so that the absorption efficiency of the absorption liquid is improved.

Description

Technical Field

[0001] The invention relates to the technical field of chlorine recovery, in particular to a chlorine absorption and recycling device for acid etching copper. Background Art

[0002] A large amount of waste liquid and waste gas are usually produced during the acid etching of copper. There is a certain amount of chlorine in the waste gas. This is due to the reaction between the chloride used in the etching solution and copper. For environmental protection and safety reasons, the chlorine needs to be treated before being discharged.

[0003] When the existing chlorine recycling device is in use, the chlorine may not be fully absorbed in the absorption tower due to uneven distribution of exhaust gas in the device, resulting in a high concentration of chlorine in the treated exhaust gas, which cannot meet environmental emission standards.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a chlorine absorption and recycling device for acid etching copper is proposed. Summary of the invention

[0005] The object of the present invention is to provide a chlorine absorbing and recycling device for acid etching copper to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a chlorine absorption and recycling device for acid etching copper, comprising a tower body and a uniform distribution component, an air inlet pipe is arranged on one side of the tower body, the uniform distribution component is arranged at one end of the air inlet pipe located in the tower body, the uniform distribution component comprises an outer cover, a uniform distribution chamber, an air outlet, a liquid collecting tank, a liquid outlet, a liquid discharge port, a uniform distribution impeller and a water-proof membrane, the air inlet pipe is connected to the outer cover at one end of the tower body, and a uniform distribution chamber is opened in the outer cover, the uniform distribution chamber is symmetrically provided with air outlets around, a liquid collecting tank is opened on one side of the uniform distribution chamber, and the liquid collecting tank is symmetrically provided with liquid outlets on one side, a liquid discharge port is arranged on one side of the liquid outlet, a uniform distribution impeller is rotatably connected in the uniform distribution chamber, and a water-proof membrane is connected to the side wall of the uniform distribution chamber.

[0007] Furthermore, two coils are arranged in the tower body, and a nozzle is opened on one side of the coil, and a drainage pipe is connected to the lower end of the tower body.

[0008] Furthermore, an installation groove is opened on the upper side of the tower body, and an installation frame is slidably connected in the installation groove, a dehumidification plate is connected in the installation frame, and a chlorine gas detector is arranged in the dehumidification plate, and a weight meter is arranged at the connection between the installation frame and the dehumidification plate.

[0009] Furthermore, an exhaust pipe is connected to the upper end of the tower body, and a three-way valve is arranged above the exhaust pipe. A return air pipe is arranged on one side of the three-way valve, and the return air pipe is connected to the air inlet pipe through a one-way valve.

[0010] Furthermore, a liquid storage tank is arranged below the drain pipe, and a partition is arranged inside the liquid storage tank. An overflow port is opened at the upper part of the partition, and the partition divides the interior of the liquid storage tank into a processing tank and a liquid storage tank.

[0011] Furthermore, openings are symmetrically provided on both sides of the treatment pool, and a pad is provided in the treatment pool, and water holes are provided on the surface of the pad.

[0012] Furthermore, the four corners of the pad are symmetrically connected with pull ropes, and the other ends of the pull ropes are connected to a winding wheel, and one side of the winding wheel is connected to a motor.

[0013] Furthermore, a bottom frame is arranged above the pad, and support plates are symmetrically connected to the four corners of the bottom frame. A buffer spring is connected above the support plate, and a pressure sensor is arranged between the support plate and the buffer spring.

[0014] Furthermore, the other end of the buffer spring is connected to a sieve plate, and the sieve plate is elastically connected to the support plate through the buffer spring, and the sieve plate is slidably connected to the bottom frame by snap-fitting.

[0015] Furthermore, a water pump is provided in the liquid storage tank, and a water pump is connected to the upper end of the water pump. A stirring rod is provided on one side of the liquid storage tank, and a mixing impeller is connected to the upper end of the stirring rod. A feeding pipe is provided above the stirring rod in the liquid storage tank, and the water pump is connected to the coil through a pipeline.

[0016] The present invention provides a chlorine gas absorbing and recycling device for acid etching copper, which has the following beneficial effects:

[0017] 1. When the present invention is in use, when the exhaust gas is sent into the tower body from the air inlet pipe, the exhaust gas will first enter the uniform distribution chamber, and drive the uniform distribution impeller to rotate in the uniform distribution chamber, and then send the exhaust gas out of the outer cover from the air outlet to make it evenly distributed in the tower body, so as to increase the contact area between the exhaust gas and the absorption liquid, thereby fully absorbing the chlorine. When the exhaust gas is dispersed, the water vapor mixed in the exhaust gas will adhere to the uniform distribution impeller, and under the action of centrifugal force, it will be thrown out from the uniform distribution impeller to the water-proof membrane. The water vapor gathers into water droplets on the water-proof membrane and flows into the liquid collecting tank, and then leaves the outer cover from the liquid outlet through the liquid outlet to complete the gas-liquid separation. In summary, when in use, the exhaust gas sent into the tower body can be separated into gas and liquid, and the exhaust gas can be evenly distributed during the separation process to increase the contact area between the exhaust gas and the absorption liquid, thereby fully absorbing the chlorine.

[0018] 2. When the exhaust gas of the present invention rises uniformly in the tower body, the water pump extracts the absorption liquid in the liquid storage tank through the pumping pipe and sends it into the coil, and sprays the absorption liquid into the tower body through the nozzle to absorb the chlorine in the exhaust gas. The tail gas after absorption passes through the dehumidification plate to remove moisture and then leaves the tower body from the exhaust pipe. When the tail gas is dehumidified, the chlorine detector in the dehumidification plate can detect the chlorine content in the tail gas. If the chlorine contained in the tail gas exceeds the standard, the three-way valve will guide the tail gas into the return pipe. When the exhaust gas flows in the intake pipe, a negative pressure will be formed at the connection between the return pipe and the intake pipe, so that the excess tail gas in the return pipe is sucked into the intake pipe, so that the tail gas enters the tower body again for absorption. The exhaust gas is then dehumidified by the three-way valve, until the chlorine detector detects that the chlorine content in the exhaust gas meets the standard. The three-way valve then guides the exhaust gas out of the exhaust pipe, and the one-way valve at the connection between the return pipe and the intake pipe can prevent the exhaust gas from entering the return pipe. The weight meter in the installation frame can detect the weight of the dehumidifier plate. When the weight of the dehumidifier plate reaches a predetermined value, it indicates that the dehumidifier plate has reached its absorption limit. At this time, the installation frame can be taken out of the installation slot and the dehumidifier plate can be processed and replaced to ensure the dehumidification efficiency of the dehumidifier plate. In summary, when in use, when dehumidifying the exhaust gas after absorbing chlorine before discharging it, the chlorine content in the exhaust gas can be detected. If there is too much residual chlorine, the exhaust gas can be refluxed and absorbed again. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a half-cut three-dimensional exploded structure of an outer cover of a chlorine gas absorbing and recycling device for acid etching copper of the present invention;

[0020] Figure 2 It is a schematic diagram of a half-cut three-dimensional exploded main structural view of a tower body of a chlorine gas absorbing and recycling device for acid etching copper of the present invention;

[0021] Figure 3 It is a schematic diagram of a half-cut three-dimensional exploded structure of a tower body of a chlorine gas absorbing and recycling device for acid etching copper according to the present invention, viewed from above;

[0022] Figure 4 It is a schematic diagram of the cross-sectional front view of the structure of a chlorine gas absorbing and recycling device for acid etching copper of the present invention;

[0023] Figure 5 It is a schematic diagram of a cross-sectional three-dimensional structure of a chlorine gas absorbing and recycling device for acid etching copper of the present invention;

[0024] Figure 6 This is a schematic diagram of the overall three-dimensional structure of a chlorine gas absorbing and recycling device for acid etching copper of the present invention;

[0025] Figure 7 The present invention is a schematic diagram of a half-cut three-dimensional exploded structure of a liquid storage tank of a chlorine gas absorbing and recycling device for acid etching copper.

[0026] In the figure: 1, tower body; 2, air inlet pipe; 3, uniform distribution component; 301, outer cover; 302, uniform distribution chamber; 303, air outlet; 304, liquid collecting tank; 305, liquid outlet; 306, liquid discharge port; 307, uniform distribution impeller; 308, water-proof membrane; 4, coil; 5, nozzle; 6, drain pipe; 7, installation groove; 8, installation frame; 9, dehumidification plate; 10, exhaust pipe; 11, three-way valve; 12. Air return pipe; 13. Liquid storage tank; 14. Partition; 15. Overflow port; 16. Treatment tank; 17. Liquid storage tank; 18. Through port; 19. Pad; 20. Pull rope; 21. Winding wheel; 22. Motor; 23. Bottom frame; 24. Support plate; 25. Buffer spring; 26. Screen plate; 27. Suction pipe; 28. Water pump; 29. ​​Agitator rod; 30. Mixing impeller; 31. Feeding pipe. DETAILED DESCRIPTION

[0027] See also Figures 1 to 7 The present invention provides a technical solution: a chlorine gas recycling device for acid etching copper, comprising a tower body 1 and a uniform distribution component 3, an air inlet pipe 2 is arranged on one side of the tower body 1, the uniform distribution component 3 is arranged at one end of the air inlet pipe 2 located in the tower body 1, the uniform distribution component 3 comprises an outer cover 301, a uniform distribution cavity 302, an air outlet 303, a liquid collecting tank 304, a liquid outlet 305, a liquid discharge port 306, a uniform distribution impeller 307 and a water-blocking membrane 308, the air inlet pipe 2 is located in the tower body 1 is connected to an outer cover 301, and a uniform cavity 302 is opened in the outer cover 301, and air outlets 303 are symmetrically opened around the uniform cavity 302, a liquid collecting tank 304 is opened on one side of the uniform cavity 302, and liquid outlets 305 are symmetrically opened on one side of the liquid collecting tank 304, and a liquid discharge port 306 is arranged on one side of the liquid outlet 305, a uniform impeller 307 is rotatably connected in the uniform cavity 302, and a water-proof membrane 308 is connected to the side wall of the uniform cavity 302.

[0028] See also Figures 1 to 6 , a mounting groove 7 is provided on the upper side of the tower body 1, and a mounting frame 8 is slidably connected in the mounting groove 7, a dehumidification plate 9 is connected in the mounting frame 8, and a chlorine gas detector is arranged in the dehumidification plate 9, a weight meter is arranged at the connection between the mounting frame 8 and the dehumidification plate 9, an exhaust pipe 10 is connected to the upper end of the tower body 1, and a three-way valve 11 is arranged above the exhaust pipe 10, a return air pipe 12 is arranged on one side of the three-way valve 11, and the return air pipe 12 is connected to the intake pipe 2 through a one-way valve;

[0029] The specific operation is as follows. When the exhaust gas is sent into the tower body 1 from the air inlet pipe 2, the exhaust gas will first enter the uniform distribution chamber 302, and drive the uniform distribution impeller 307 to rotate in the uniform distribution chamber 302, and then send the exhaust gas out of the outer cover 301 from the air outlet 303 to make it uniformly distributed in the tower body 1, so as to increase the contact surface between the exhaust gas and the absorption liquid, so as to fully absorb the chlorine. When the exhaust gas is dispersed, the water vapor mixed in the exhaust gas will adhere to the uniform distribution impeller 307, and under the action of centrifugal force, it will be thrown out from the uniform distribution impeller 307 to the water-proof membrane 308, and the water vapor will gather on the water-proof membrane 308 to form water vapor. The exhaust gas is uniformly distributed in the tower body 1 during the separation process to increase the contact surface between the exhaust gas and the absorption liquid, thereby fully absorbing the chlorine. When the exhaust gas is uniformly distributed and rises in the tower body 1, the water pump 28 extracts the absorption liquid in the liquid storage tank 17 through the pumping pipe 27 and sends it into the coil 4, and sprays the absorption liquid into the tower body 1 through the nozzle 5 to absorb the chlorine in the exhaust gas. The exhaust gas after absorption passes through the dehumidification plate 9 leaves the tower body 1 from the exhaust pipe 10 after removing moisture. When the tail gas is dehumidified, the chlorine detector in the dehumidification plate 9 can detect the chlorine content in the tail gas. If the chlorine contained in the tail gas exceeds the standard, the three-way valve 11 will guide the tail gas into the return pipe 12. When the exhaust gas flows in the intake pipe 2, a negative pressure will be formed at the connection between the return pipe 12 and the intake pipe 2, thereby sucking the excess tail gas in the return pipe 12 into the intake pipe 2, so that the tail gas enters the tower body 1 again for absorption treatment, until the chlorine detector detects that the chlorine content in the tail gas meets the standard, and the three-way valve 11 then guides the tail gas out of the exhaust pipe 10. The one-way valve at the connection between the return air pipe 12 and the intake pipe 2 can prevent the exhaust gas from entering the return air pipe 12. The weight meter in the mounting frame 8 can detect the weight of the dehumidification plate 9. When the weight of the dehumidification plate 9 reaches a predetermined value, it indicates that the dehumidification plate 9 reaches the absorption limit. At this time, the mounting frame 8 can be taken out of the mounting slot 7 and the dehumidification plate 9 can be processed and replaced to ensure the dehumidification efficiency of the dehumidification plate 9. In summary, when in use, when dehumidifying the exhaust gas after absorbing chlorine before discharging it, the chlorine content in the exhaust gas can be detected. If there is too much residual chlorine, the exhaust gas can be refluxed and absorbed again.

[0030] See also Figures 3 to 7A liquid storage tank 13 is arranged below the drain pipe 6, and a partition 14 is arranged inside the liquid storage tank 13. An overflow port 15 is opened on the upper part of the partition 14, and the partition 14 divides the inside of the liquid storage tank 13 into a treatment tank 16 and a liquid storage tank 17. Through ports 18 are symmetrically opened on both sides of the treatment tank 16, and a pad 19 is arranged inside the treatment tank 16. A water hole is arranged on the surface of the pad 19. Pull ropes 20 are symmetrically connected to the four corners of the pad 19, and the other end of the pull rope 20 is connected to a winding wheel 21, and a motor 22 is connected to one side of the winding wheel 21. A bottom frame 23 is arranged above the pad 19, and support plates 24 are symmetrically connected to the four corners of the bottom frame 23. A buffer spring 25 is connected to the top of the support plate 24, and a pressure sensor is arranged between the support plate 24 and the buffer spring 25. A sieve plate 26 is connected to the other end of the buffer spring 25, and the sieve plate 26 is elastically connected to the support plate 24 through the buffer spring 25. The sieve plate 26 is slidably connected to the bottom frame 23 by snapping. A water pump 27 is arranged in the liquid reservoir 17, and a water pump 28 is connected to the upper end of the water pump 27. A stirring rod 29 is arranged on one side of the liquid reservoir 17, and a mixing impeller 30 is connected to the upper end of the stirring rod 29. A feeding pipe 31 is arranged above the stirring rod 29 of the liquid reservoir 17, and the water pump 28 is connected to the coil 4 through a pipeline.

[0031] The specific operation is as follows: after the absorption liquid absorbs the chlorine in the exhaust gas, the absorption liquid will descend in the tower body 1 and enter the treatment pool 16 area in the liquid storage tank 13 through the drain pipe 6 and stand therein. At the same time, the treatment liquid is added to the treatment pool 16 to restore the absorption liquid's absorption of chlorine. The solids generated during the treatment process will be precipitated in the treatment pool 16 together with the solids generated when the absorption liquid absorbs chlorine and accumulate on the sieve plate 26, so that the sieve plate 26 descends in the bottom frame 23 and compresses the buffer spring 25. While the pad 19 provides support for the buffer spring 25, the pressure sensor arranged thereon detects the pressure on the buffer spring 25. When the pressure value reaches a predetermined value, the motor 22 drives the winding wheel 21 to rotate and winds the pull rope 20, thereby raising the bottom frame 23 to the opening 18 in the treatment pool 16 through the pad 19. The bottom frame 23 is conveniently taken out and the sediment is cleaned, and then the bottom frame 23 is put back on the pad 19 from the opening 18. The motor 22 can reversely run to send the pad 19 back to the bottom of the treatment tank 16. After the level of the treated absorption liquid in the treatment tank 16 reaches the overflow port 15, the treated liquid can flow into the storage tank 17 for reuse. When the dehumidification plate 9 detects that the chlorine content in the tail gas exceeds the standard, alkali solution can be added to the storage tank 17 from the feeding pipe 31 to increase the alkalinity of the treatment liquid, thereby increasing the absorption capacity of the absorption liquid for chlorine. When adding alkali solution, the fallen alkali solution can drive the stirring rod 29 to rotate in the storage tank 17 through the mixing impeller 30 to stir the absorption liquid to ensure that the alkali solution can be evenly mixed with the absorption liquid. In summary, when in use, the absorption liquid can be processed simultaneously to improve the absorption efficiency of the absorption liquid.

[0032] In summary, when the chlorine gas recycling device for acid etching copper is used, the waste gas is first sent into the tower body 1 from the air inlet pipe 2, and the waste gas will first enter the uniform distribution chamber 302, and drive the uniform distribution impeller 307 to rotate in the uniform distribution chamber 302, and then the waste gas is dispersed and sent out of the outer cover 301 from the air outlet 303, so that it is evenly distributed in the tower body 1, so as to increase the contact surface between the waste gas and the absorption liquid, so as to fully absorb the chlorine gas, and when the waste gas is dispersed, the water vapor mixed in the waste gas will adhere to the uniform distribution impeller 307, and under the action of centrifugal force, it will be thrown from the uniform distribution impeller 307 to the water-proof membrane 308, and the water vapor will gather into water droplets on the water-proof membrane 308 and flow into the collecting tank 304, and then leave the outer cover 301 from the discharge port 306 through the liquid outlet 305, completing the gas Liquid separation, when the exhaust gas rises evenly in the tower body 1, the water pump 28 extracts the absorption liquid in the liquid storage tank 17 through the pumping pipe 27 and sends it into the coil 4, and sprays the absorption liquid into the tower body 1 through the nozzle 5 to absorb the chlorine in the exhaust gas. The exhaust gas after absorption passes through the dehumidification plate 9 to remove moisture and then leaves the tower body 1 from the exhaust pipe 10. When the exhaust gas is dehumidified, the chlorine detector in the dehumidification plate 9 can detect the chlorine content in the exhaust gas. If the chlorine contained in the exhaust gas exceeds the standard, the three-way valve 11 will guide the exhaust gas into the return pipe 12. When the exhaust gas flows in the intake pipe 2, a negative pressure will be formed at the connection between the return pipe 12 and the intake pipe 2, thereby sucking the excess exhaust in the return pipe 12 into the intake pipe 2, so that the exhaust gas enters the tower body 1 again for absorption treatment until the chlorine is The gas detector detects that the chlorine content in the exhaust gas meets the standard, and the three-way valve 11 then guides the exhaust gas out of the exhaust pipe 10, while the one-way valve at the connection between the return pipe 12 and the intake pipe 2 can prevent the exhaust gas from entering the return pipe 12. The weight meter in the installation frame 8 can detect the weight of the dehumidification plate 9. When the weight of the dehumidification plate 9 reaches a predetermined value, it means that the dehumidification plate 9 has reached the absorption limit. At this time, the installation frame 8 can be taken out of the installation slot 7 and the dehumidification plate 9 can be processed and replaced to ensure the dehumidification efficiency of the dehumidification plate 9. After the absorption liquid absorbs the chlorine in the exhaust gas, the absorption liquid will descend in the tower body 1 and enter the treatment pool 16 area in the liquid storage tank 13 through the drain pipe 6 and stand therein. At the same time, the treatment liquid is added to the treatment pool 16 to restore the absorption liquid's absorption of chlorine. The solids generated during the treatment process will be precipitated in the treatment tank 16 together with the solids generated when the absorption liquid absorbs chlorine and accumulate on the sieve plate 26, causing the sieve plate 26 to descend in the bottom frame 23 and compress the buffer spring 25. While the pad 19 provides support for the buffer spring 25, the pressure sensor arranged thereon detects the pressure on the buffer spring 25. When the pressure value reaches a predetermined value, the motor 22 drives the winding wheel 21 to rotate and winds the pull rope 20, thereby raising the bottom frame 23 in the treatment tank 16 to the opening 18 through the pad 19, so as to facilitate the removal of the bottom frame 23 and the cleaning of the sediment, and then put the bottom frame 23 back on the pad 19 from the opening 18. The motor 22 can reversely run to send the pad 19 back to the bottom of the treatment tank 16.When the level of the treated absorption liquid in the treatment tank 16 reaches the overflow port 15, the treated liquid can flow into the storage tank 17 for reuse. When the dehumidification plate 9 detects that the chlorine content in the tail gas exceeds the standard, alkali liquid can be added to the storage tank 17 from the feeding pipe 31 to increase the alkalinity of the treated liquid, thereby increasing the absorption capacity of the absorption liquid for chlorine. When adding alkali liquid, the falling alkali liquid can drive the stirring rod 29 to rotate in the storage tank 17 through the mixing impeller 30 to stir the absorption liquid to ensure that the alkali liquid can be evenly mixed with the absorption liquid.

[0033] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A chlorine gas recycling device for acid etching copper, characterized in that: The invention comprises a tower body (1) and a uniform distribution component (3), wherein an air inlet pipe (2) is arranged on one side of the tower body (1), and the uniform distribution component (3) is arranged at one end of the air inlet pipe (2) located inside the tower body (1), and the uniform distribution component (3) comprises an outer cover (301), a uniform distribution chamber (302), an air outlet (303), a liquid collecting tank (304), a liquid outlet (305), a liquid discharge port (306), a uniform distribution impeller (307) and a water-isolating membrane (308), and the end of the air inlet pipe (2) located inside the tower body (1) is connected to the outer cover ( 301), and a uniformly distributed chamber (302) is provided in the outer cover (301), air outlets (303) are symmetrically provided around the uniformly distributed chamber (302), a liquid collecting tank (304) is provided on one side of the uniformly distributed chamber (302), and liquid outlets (305) are symmetrically provided on one side of the liquid collecting tank (304), a liquid discharge port (306) is provided on one side of the liquid outlet (305), a uniformly distributed impeller (307) is rotatably connected in the uniformly distributed chamber (302), and a water-proof membrane (308) is connected to the side wall of the uniformly distributed chamber (302).

2. The chlorine gas absorbing and recycling device for acid etching copper according to claim 1, characterized in that: Two coils (4) are arranged in the tower body (1), and a nozzle (5) is opened on one side of the coil (4). The lower end of the tower body (1) is connected to a drainage pipe (6).

3. The chlorine gas absorbing and recycling device for acid etching copper according to claim 1, characterized in that: The tower body (1) is provided with a mounting groove (7) on the upper side, and a mounting frame (8) is slidably engaged in the mounting groove (7), a dehumidification plate (9) is connected in the mounting frame (8), and a chlorine gas detector is arranged in the dehumidification plate (9), and a weight meter is arranged at the connection between the mounting frame (8) and the dehumidification plate (9).

4. The chlorine gas absorbing and recycling device for acid etching copper according to claim 1, characterized in that: The upper end of the tower body (1) is connected to an exhaust pipe (10), and a three-way valve (11) is arranged above the exhaust pipe (10). A return air pipe (12) is arranged on one side of the three-way valve (11), and the return air pipe (12) is connected to the intake pipe (2) via a one-way valve.

5. The chlorine gas absorbing and recycling device for acid etching copper according to claim 2, characterized in that: A liquid storage tank (13) is arranged below the drainage pipe (6), and a partition (14) is arranged inside the liquid storage tank (13). An overflow port (15) is opened on the upper part of the partition (14), and the partition (14) divides the interior of the liquid storage tank (13) into a treatment tank (16) and a liquid storage tank (17).

6. The chlorine gas absorbing and recycling device for acid etching copper according to claim 5, characterized in that: Through openings (18) are symmetrically provided on both sides of the treatment pool (16), and a pad (19) is provided in the treatment pool (16), and a water through hole is provided on the surface of the pad (19).

7. The chlorine gas absorbing and recycling device for acid etching copper according to claim 6, characterized in that: The four corners of the pad (19) are symmetrically connected to pull ropes (20), and the other end of the pull rope (20) is connected to a reel (21), and one side of the reel (21) is connected to a motor (22).

8. The chlorine gas absorbing and recycling device for acid etching copper according to claim 7, characterized in that: A bottom frame (23) is arranged above the pad (19), and support plates (24) are symmetrically connected to the four corners of the bottom frame (23), a buffer spring (25) is connected above the support plate (24), and a pressure sensor is arranged between the support plate (24) and the buffer spring (25).

9. The chlorine gas absorbing and recycling device for acid etching copper according to claim 8, characterized in that: The other end of the buffer spring (25) is connected to a sieve plate (26), and the sieve plate (26) is elastically connected to the support plate (24) via the buffer spring (25), and the sieve plate (26) is slidably connected to the bottom frame (23) by snap-fitting.

10. The chlorine gas absorbing and recycling device for acid etching copper according to claim 5, characterized in that: A water pump (27) is provided in the liquid storage tank (17), and the upper end of the water pump (27) is connected to a water pump (28). A stirring rod (29) is provided on one side of the liquid storage tank (17), and the upper end of the stirring rod (29) is connected to a mixing impeller (30). A feeding pipe (31) is provided above the stirring rod (29) in the liquid storage tank (17), and the water pump (28) is connected to the coil (4) through a pipeline.

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