Tail gas desulfurization device for secondary zinc oxide production

Abstract

The invention belongs to the technical field of tail gas treatment, in particular to a tail gas desulfurization device for secondary zinc oxide production, and provides the following scheme that the tail gas desulfurization device comprises a base, a pretreatment tank and a desulfurization tank, the pretreatment tank and the desulfurization tank are fixedly connected to the top of the base, and a gas inlet is formed in the side, away from the desulfurization tank, of the pretreatment tank; a first exhaust port is formed in one side, close to the desulfurization tank, of the pretreatment tank. In the invention, tail gas is guided to flow through the flow guide cover, so that the tail gas can stably push the conical plug and the pressure triggering piece to trigger the pressure switch, and the piston is controlled to press downwards to communicate the inner cavity of the gas conveying pipe with the bottom of the desulfurization tank, so that the tail gas is uniformly discharged from the sinking gas hole; the contact area and the contact time of the tail gas and the desulfurization liquid at the bottom of the desulfurization tank are greatly increased, so that the desulfurization efficiency is remarkably improved, the action of the electric push rod can be adjusted according to the circulation of the tail gas in the desulfurization process, and the tail gas can be automatically controlled to enter the desulfurization liquid.

Description

Technical Field

[0001] The invention relates to the technical field of tail gas treatment, and in particular to a tail gas desulfurization device for secondary zinc oxide production. Background Art

[0002] In the production process of zinc oxide, the tail gas often contains a large amount of harmful pollutants such as sulfur dioxide. If these tail gases are directly discharged into the atmosphere without effective treatment, it will not only cause serious pollution to the environment, but also cause great harm to the surrounding ecological environment and human health.

[0003] Traditional tail gas desulfurization technology has many limitations.

[0004] After searching, a Chinese patent application with application publication number CN112023648A discloses a tail gas desulfurization device for a zinc oxide production line, including a desulfurization tower, an absorbent tank, and a tail gas conveying device. Through the design of the blocking structure, the desulfurization device can greatly increase the reaction time of the tail gas inside the desulfurization tower, which is beneficial to the desulfurization treatment and ensures the high efficiency of the tail gas treatment.

[0005] The above device still has some shortcomings. It cannot control the coordination between different parts of the equipment according to the flow state of the tail gas, lacks effective automatic control and safety protection measures, and brings certain safety risks and labor intensity to the operators. Therefore, it is necessary to develop a tail gas desulfurization device for zinc oxide production to solve the above problems. Summary of the invention

[0006] Based on the technical problem that the existing devices lack effective automatic control, the present invention proposes a tail gas desulfurization device for secondary zinc oxide production.

[0007] The present invention proposes a tail gas desulfurization device for secondary zinc oxide production, comprising a base, a pretreatment tank and a desulfurization tank, wherein the pretreatment tank and the desulfurization tank are both fixedly connected to the top of the base, an air inlet is arranged on the side of the pretreatment tank away from the desulfurization tank, a first exhaust port is arranged on the side of the pretreatment tank close to the desulfurization tank, a second exhaust port is arranged in the middle position of the top of the desulfurization tank, a gas pipeline is sealedly connected to the side of the first exhaust port close to the desulfurization tank, the gas pipeline is located inside the desulfurization tank, the bottom outer wall of the gas pipeline contacts the inner wall of the bottom of the desulfurization tank, a circle of evenly distributed sinking air holes is provided on the side of the bottom of the gas pipeline, a guide cover is fixedly connected to the inner wall of the gas pipeline, and the inner diameter of the top of the guide cover is larger than that of the bottom of the gas pipeline. The inner diameter of the gas pipe is fixed with a support plate below the air deflector, a longitudinally slidable lifting rod is inserted in the middle of the support plate, a conical plug is fixedly connected to the top of the lifting rod, the conical plug is inserted in the bottom of the air deflector, the tip of the conical plug is located at the top, a pressure trigger is fixedly connected to the bottom of the lifting rod, a spring is fixedly connected between the support plate and the pressure trigger, a suspension is fixedly connected to the inner wall of the middle of the gas pipe, an air flow channel is present between the suspension and the inner wall of the gas pipe, an electric push rod is fixedly connected to the bottom of the suspension, a piston is fixedly connected to the bottom of the electric push rod, the outer diameter of the piston is equal to the inner diameter of the gas pipe, a pressure switch is fixedly connected to the middle position of the top of the support plate, and the pressure switch is located directly below the pressure trigger.

[0008] Preferably, the sinking air holes are arranged in a ring around the center of the bottom of the gas pipe, and the center distance between two adjacent sinking air holes is equal. Three evenly distributed sieve plates are fixedly connected to the bottom outer wall of the gas pipe. The diameter of the sieve plates is equal to the inner diameter of the desulfurization tank. The plate bodies of the three sieve plates are all provided with sieve holes, and the sieve holes on the three sieve plates are staggered.

[0009] Preferably, the outer wall of the bottom of the air deflector is provided with an annular edge, and two columnar members are symmetrically provided at the bottom of the annular edge, and the support plate is fixedly connected to the bottom of the two columnar members.

[0010] Preferably, a same bellows is fixedly connected between the suspension member and the piston, and the electric push rod is located inside the bellows.

[0011] Preferably, a sealing ring is embedded in the middle of the piston, the height of the bottom of the piston is higher than the height of the top of the sinking air hole, the inner walls on both sides of the air pipe are fixedly connected to limit blocks, and the two limit blocks are in contact with the top of the piston.

[0012] Preferably, a water pump seat is fixedly connected to the top of the base, a water pump is fixedly connected to the top of the water pump seat, a liquid extraction pipe is provided at the water pumping end, a liquid infusion pipe is provided at the water discharge end of the water pump, and the end of the liquid infusion pipe away from the water pump is sealed and connected to the desulfurization tank.

[0013] Preferably, the inner wall in the middle of the desulfurization tank is fixedly connected to a shell, the top of the shell is fixedly connected to a connecting piece, the bottom of one end of the connecting piece is fixedly connected to a guide rail, the body of the guide rail is slidably connected to a sliding sleeve, the outer wall on one side of the sliding sleeve is fixedly connected to an extension plate, the bottom of the extension plate is fixedly connected to a float, and the body of the float is provided with evenly distributed air holes.

[0014] Preferably, a mounting piece is fixedly connected to the side of the sliding sleeve away from the extension plate, a power-off switch is fixedly connected to the top of the mounting piece, a power-off trigger is fixedly connected to the inner wall of the top of the shell, the power-off switch is located directly below the power-off trigger, a power-on switch is fixedly connected to the bottom of the mounting piece, a power-on trigger is fixedly connected to the inner wall of the bottom of the shell, and the power-on switch contacts the top of the power-on trigger.

[0015] Preferably, the top of the base close to the pretreatment tank side is fixedly connected to a first bracket, the outer wall of the bottom of the pretreatment tank is fixedly connected to a first leg, the first leg is fixedly connected to the top of the first bracket, the outer wall of the bottom of the desulfurization tank is fixedly connected to a second leg, and the second leg is fixedly connected to the top of the base.

[0016] Preferably, an inspection platform is fixedly connected to the outer wall of the desulfurization tank, a second bracket is fixedly connected to the bottom of the inspection platform, the second bracket is fixedly connected to the top of the base, and an inspection ladder is fixedly connected to one side of the inspection platform.

[0017] Compared with the prior art, the present invention provides a tail gas desulfurization device for zinc oxide production, which has the following beneficial effects: 1. A tail gas desulfurization device for zinc oxide production, by arranging a guide cover, a conical plug, a pressure trigger, a pressure switch, an electric push rod, a piston and a sinking air hole, guides the flow of tail gas through the guide cover, so that the tail gas can stably push the conical plug and the pressure trigger, thereby triggering the pressure switch, and then controlling the piston to press down to connect the inner cavity of the gas pipeline with the bottom of the desulfurization tank, so that the tail gas is evenly discharged from the sinking air hole, which greatly enhances the contact area and contact time between the tail gas and the desulfurization liquid at the bottom of the desulfurization tank, thereby significantly improving the desulfurization efficiency. During the desulfurization process, the action of the electric push rod can be adjusted according to the circulation of the tail gas, so as to realize automatic control of the tail gas entering the desulfurization liquid.

[0018] 2. This is a tail gas desulfurization device for zinc oxide production. By setting a sieve plate and sieve holes, when the tail gas is discharged from the sinking air holes, since the sinking air holes are arranged in a ring around the bottom center of the gas pipeline and the distance between adjacent circles is equal, the tail gas can flow into the desulfurization liquid layer inside the desulfurization tank from various evenly distributed positions and diffuse evenly in the desulfurization liquid layer, avoiding the situation where the local concentration is too high or too low. The sieve plate is immersed in the desulfurization liquid. When the tail gas continues to rise through the sieve plate, the sieve plate will further rectify and disperse the bubbles. The staggered sieve holes increase the flow path and contact area of ​​the tail gas during the rising process, so that the mixing between the tail gas and the desulfurization liquid is more sufficient and the desulfurization reaction is more thorough.

[0019] 3. A tail gas desulfurization device for zinc oxide production is provided with a power-on trigger, a power-on switch, a power-off trigger, a power-off switch, a float and an air hole. When the power-on trigger is in the initial state, the power-on switch is triggered, and the signal is transmitted to the control system of the water pump, and the desulfurization liquid is introduced into the desulfurization tank. When the level of the desulfurization liquid in the desulfurization tank changes, the float will float up and down with the height of the liquid level. The float is connected to the sliding sleeve through an extension plate, thereby driving the sliding sleeve to slide up and down in the shell along the guide rail. The air hole on the float can provide exhaust gas circulation to prevent the displacement of the float caused by the flow of exhaust gas. When the liquid level rises to the set height, the power-off switch on the top of the mounting part will contact the power-off trigger on the top inner wall of the shell. At this time, the power-off switch The switch is triggered, and its signal is transmitted to the control system of the water pump. The water pump stops working, and the water pipe stops conveying desulfurization liquid to the desulfurization tank. In the process of exhaust gas continuously passing through the desulfurization liquid, part of the desulfurization liquid will leave. After long-term operation of the device, the desulfurization liquid will be reduced. When the liquid level drops to the set height, the power switch will contact the power trigger again, and control the water pump to start working again, so that the water pipe conveys desulfurization liquid to the desulfurization tank, so that the supply of desulfurization liquid is always maintained within an appropriate range, ensuring the stability of the conditions of the desulfurization reaction, which is conducive to improving the desulfurization efficiency and consistency of the effect. At the same time, a closed-loop control system is formed, which can automatically adapt to the changes in the liquid level during the desulfurization process, without the need for frequent manual intervention, reducing the difficulty of operation and labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a tail gas desulfurization device for zinc oxide production proposed by the present invention; Figure 2 This is a front view schematic diagram of a tail gas desulfurization device for zinc oxide production proposed by the present invention; Figure 3 This is a schematic cross-sectional view of a desulfurization tank of a tail gas desulfurization device for zinc oxide production proposed by the present invention; Figure 4 A schematic diagram of the partial structure of a tail gas desulfurization device for zinc oxide production proposed by the present invention; Figure 5 This is a schematic diagram of the gas transmission pipe and sieve plate structure of a tail gas desulfurization device for zinc oxide production proposed by the present invention; Figure 6 This is a schematic diagram of the cross-sectional structure of a gas transmission pipe of a tail gas desulfurization device for zinc oxide production proposed by the present invention; Figure 7 A schematic cross-sectional view of a flow guide cover and a bellows of a tail gas desulfurization device for zinc oxide production proposed by the present invention; Figure 8 This is a schematic structural diagram of location A of a tail gas desulfurization device for zinc oxide production proposed by the present invention.

[0021] In the figure: 1, base; 2, water pump seat; 3, water pump; 4, infusion pipe; 5, extraction pipe; 6, first bracket; 7, first leg; 8, pretreatment tank; 9, air inlet; 10, first exhaust port; 11, second leg; 12, desulfurization tank; 13, second bracket; 14, maintenance platform; 15, maintenance ladder; 16, guardrail; 17, air pipe; 18, second exhaust port; 19, sieve plate; 20, sinking air hole; 21, shell; 22, guide rail; 23, float; 24, Air hole; 25. Connecting piece; 26. Sliding sleeve; 27. Extension plate; 28. Mounting piece; 29. ​​Power-off switch; 30. Power-off trigger; 31. Power-on switch; 32. Power-on trigger; 33. Sieve hole; 34. Air deflector; 35. Suspension piece; 36. Pressure switch; 37. Bellows; 38. Limit block; 39. Piston; 40. Sealing ring; 41. Conical plug; 42. Electric push rod; 43. Support plate; 44. Lifting rod; 45. Spring; 46. Pressure trigger. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] Reference Figure 1-8A tail gas desulfurization device for secondary zinc oxide production comprises a base 1, a pretreatment tank 8 and a desulfurization tank 12, the pretreatment tank 8 and the desulfurization tank 12 are both fixedly connected to the top of the base 1, an air inlet 9 is arranged on the side of the pretreatment tank 8 away from the desulfurization tank 12, a first exhaust port 10 is arranged on the side of the pretreatment tank 8 close to the desulfurization tank 12, a second exhaust port 18 is arranged at the middle position of the top of the desulfurization tank 12, a gas pipe 17 is sealedly connected to the side of the first exhaust port 10 close to the desulfurization tank 12, the gas pipe 17 is located inside the desulfurization tank 12, the bottom outer wall of the gas pipe 17 contacts the inner wall of the bottom of the desulfurization tank 12, a circle of evenly distributed sinking air holes 20 is provided on the side of the bottom of the gas pipe 17, a guide cover 34 is fixedly connected to the inner wall of the gas pipe 17, the inner diameter of the top of the guide cover 34 is larger than the inner diameter of the bottom of the guide cover 34, and the guide cover 34 is fixedly connected to the inner wall of the gas pipe 17. A support plate 43 is fixed at the bottom, a longitudinally slidable lifting rod 44 is inserted in the middle of the support plate 43, a conical plug 41 is fixedly connected to the top of the lifting rod 44, the conical plug 41 is inserted into the bottom of the air deflector 34, the tip of the conical plug 41 is located at the top, a pressure trigger 46 is fixedly connected to the bottom of the lifting rod 44, a spring 45 is fixedly connected between the support plate 43 and the pressure trigger 46, a suspension member 35 is fixedly connected to the inner wall of the middle part of the air pipe 17, an air flow channel is present between the suspension member 35 and the inner wall of the air pipe 17, an electric push rod 42 is fixedly connected to the bottom of the electric push rod 42, a piston 39 is fixedly connected to the bottom of the electric push rod 42, the outer diameter of the piston 39 is equal to the inner diameter of the air pipe 17, a pressure switch 36 is fixedly connected to the middle position of the top of the support plate 43, and the pressure switch 36 is located directly below the pressure trigger 46.

[0024] In the present invention, the sinking air holes 20 are arranged in a ring around the center of the bottom of the gas pipeline 17, and the center distances between two adjacent sinking air holes 20 are equal. The bottom outer wall of the gas pipeline 17 is fixedly connected with three evenly distributed sieve plates 19, and the diameter of the sieve plates 19 is equal to the inner diameter of the desulfurization tank 12. The plate bodies of the three sieve plates 19 are all provided with sieve holes 33, and the sieve holes 33 on the three sieve plates 19 are staggered. When the exhaust gas is discharged from the sinking air holes 20, since the sinking air holes 20 are arranged in a ring around the bottom center of the gas pipeline 17 and are arranged in a staggered manner, the exhaust gas is discharged from the sinking air holes 20. The distances between the centers of adjacent circles are equal, and the exhaust gas can flow into the desulfurization liquid layer inside the desulfurization tank 12 from various evenly distributed positions and diffuse evenly in the desulfurization liquid layer, thereby avoiding the situation where the local concentration is too high or too low. The sieve plate 19 is immersed in the desulfurization liquid. When the exhaust gas continues to rise through the sieve plate 19, the sieve plate 19 will further rectify and disperse the bubbles. The staggered sieve holes 33 increase the flow path and contact area of ​​the exhaust gas during the rising process, thereby making the mixing between the exhaust gas and the desulfurization liquid more complete and the desulfurization reaction more thorough.

[0025] In the present invention, the outer wall at the bottom of the air deflector 34 is provided with an annular edge, and two columnar members are symmetrically provided at the bottom of the annular edge. The support plate 43 is fixedly connected to the bottom of the two columnar members, and the support plate 43 is fixed under the air deflector 34 through the annular edge and the columnar members.

[0026] In the present invention, a bellows 37 is fixedly connected between the suspension 35 and the piston 39, and the electric push rod 42 is located inside the bellows 37. The bellows 37 protects the electric push rod 42 outside the electric push rod 42. When the electric push rod 42 starts and pushes the piston 39 to move in the air pipe 17, the bellows 37 can adaptively expand and contract.

[0027] In the present invention, a sealing ring 40 is embedded in the middle of the piston 39, the height of the bottom of the piston 39 is higher than the height of the top of the sinking air hole 20, the inner walls on both sides of the gas pipe 17 are fixedly connected to the limit blocks 38, and the two limit blocks 38 are in contact with the top of the piston 39. The height design of the piston 39 and the sinking air hole 20 ensures that when the piston 39 is in the initial position, it can effectively isolate the inner cavity at the top of the gas pipe 17 and the inner cavity of the desulfurization tank 12. The sealing ring 40 can form a tight seal between the piston and the inner wall of the gas pipe 17 to prevent the desulfurization liquid from backflowing into the gas pipe 17. The limit blocks 38 on the inner walls on both sides of the gas pipe 17 can limit the movement range of the piston 39.

[0028] In the present invention, a water pump seat 2 is fixedly connected to the top of the base 1, a water pump 3 is fixedly connected to the top of the water pump seat 2, a liquid extraction pipe 5 is provided at the water extraction end of the water pump 3, a liquid infusion pipe 4 is provided at the water discharge end of the water pump 3, and one end of the liquid infusion pipe 4 away from the water pump 3 is sealed and connected to the desulfurization tank 12. The water pump 3 draws desulfurization liquid from an external desulfurization liquid storage device through the liquid extraction pipe 5, and transports the desulfurization liquid to the desulfurization tank 12 through the liquid infusion pipe 4.

[0029] In the present invention, the inner wall of the middle part of the desulfurization tank 12 is fixedly connected with the shell 21, the top of the shell 21 is fixedly connected with the connector 25, the bottom of one end of the connector 25 is fixedly connected with the guide rail 22, the body of the guide rail 22 is slidably connected with the sleeve 26, the outer wall of one side of the sleeve 26 is fixedly connected with the extension plate 27, the bottom of the extension plate 27 is fixedly connected with the float 23, the body of the float 23 is provided with evenly distributed pores 24, when the level of the desulfurization liquid inside the desulfurization tank 12 changes, the float 23 will float up and down with the level of the liquid. The float 23 is connected to the sleeve 26 through the extension plate 27, and then drives the sleeve 26 to slide up and down along the guide rail 22 in the shell 21, and the pores 24 on the float 23 can be used for exhaust gas circulation to prevent the displacement of the float 23 caused by the flow of exhaust gas.

[0030] In the present invention, a mounting member 28 is fixedly connected to one side of the sliding sleeve 26 away from the extension plate 27, a power-off switch 29 is fixedly connected to the top of the mounting member 28, a power-off trigger 30 is fixedly connected to the inner wall at the top of the shell 21, and the power-off switch 29 is located directly below the power-off trigger 30, a power-on switch 31 is fixedly connected to the bottom of the mounting member 28, a power-on trigger 32 is fixedly connected to the inner wall at the bottom of the shell 21, the power-on switch 31 contacts the top of the power-on trigger 32, and the power-on trigger 32 triggers the power-on switch 31 in the initial state, and the signal is transmitted to the control system of the water pump 3, and the desulfurization liquid is introduced into the desulfurization tank 12. When the liquid level rises to the set height, the power-off switch 29 at the top of the mounting member 28 will contact the power-off trigger 30 on the inner wall at the top of the shell 21. The power-off switch 29 is triggered, and its signal is transmitted to the control system of the water pump 3. The water pump 3 stops working, and the water pipe 4 stops conveying desulfurization liquid to the desulfurization tank 12. In the process of the tail gas continuously passing through the desulfurization liquid, part of the desulfurization liquid will leave. After the long-term operation of the device, the desulfurization liquid will be reduced. When the liquid level drops to the set height, the power-on switch 31 will contact the power-on trigger 32 again, and control the water pump 3 to start working again, so that the water pipe 4 conveys desulfurization liquid to the desulfurization tank 12, so that the supply of desulfurization liquid is always maintained within an appropriate range, ensuring the stability of the conditions of the desulfurization reaction, which is conducive to improving the desulfurization efficiency and consistency of the effect. At the same time, a closed-loop control system is formed, which can automatically adapt to the changes in the liquid level during the desulfurization process without frequent manual intervention, reducing the difficulty of operation and labor costs.

[0031] In the present invention, a first bracket 6 is fixedly connected to the top of the base 1 near the pretreatment tank 8, a first leg 7 is fixedly connected to the outer wall of the bottom of the pretreatment tank 8, the first leg 7 is fixedly connected to the top of the first bracket 6, a second leg 11 is fixedly connected to the outer wall of the bottom of the desulfurization tank 12, the second leg 11 is fixedly connected to the top of the base 1, the first bracket 6 fixes the pretreatment tank 8 to the top of the base 1 through the first leg 7, and the desulfurization tank 12 is directly fixed to the top of the base 1 through the second leg 11.

[0032] In the present invention, an outer wall of the desulfurization tank 12 is fixedly connected with an inspection platform 14, a second bracket 13 is fixedly connected to the bottom of the inspection platform 14, the second bracket 13 is fixedly connected to the top of the base 1, and an inspection ladder 15 is fixedly connected to one side of the inspection platform 14. The inspection platform 14 provides a safe space for operators to inspect and maintain equipment. The inspection ladder 15 facilitates operators to enter and exit the inspection platform 14, and the guardrail 16 can ensure the personal safety of operators during the inspection process.

[0033] When in use, the interior of the desulfurization tank 12 is filled with desulfurization liquid, and a stable desulfurization liquid layer is formed at the bottom of the desulfurization tank 12. The exhaust gas to be desulfurized enters the pretreatment tank 8 from the air inlet 9 for preliminary treatment. The pretreated exhaust gas flows along the gas pipeline 17 and reaches the guide cover 34 inside the gas pipeline 17. Since the inner diameter of the top of the guide cover 34 is larger than the inner diameter of its bottom, under the impact of the exhaust gas, the airflow is concentrated and flows downward along the inside of the guide cover 34, thereby generating a certain pressure under the guide cover 34. The pressure acts on the conical plug 41, pushing the conical plug 41 to move downward, and the lifting rod 44 and the pressure trigger 46 will also move downward. The spring 45 is stretched at this time. When the pressure trigger 46 moves downward to a certain position, it will trigger the pressure switch 36 below, and the electric signal generated will control the electric push rod 42 to push downward. The piston 39 is discharged, and the inner cavity of the air pipe 17 is connected to the bottom of the desulfurization tank 12 through the sinking air hole 20. At this time, the liquid level pressure of the desulfurization liquid and the impact force of the exhaust gas can cause the exhaust gas to be discharged more evenly from the sinking air hole 20, dispersed into the desulfurization liquid at the bottom of the desulfurization tank 12, fully contacted with the desulfurization liquid and undergo a desulfurization reaction. After the desulfurization reaction is completed, the exhaust gas will continue to rise through the air pipe 17, and finally leave from the second exhaust port 18 in the middle of the top of the desulfurization tank 12. With the completion of the desulfurization reaction, the exhaust gas stops passing through the guide cover 34, and the pressure trigger 46 is reset under the elastic restoring force of the spring 45. The pressure trigger 46 leaves the triggering area of ​​the pressure switch 36, and the pressure switch 36 returns to its initial state. The electric push rod 42 is controlled by a changing electrical signal to retract the piston 39 and return to its initial position, waiting for the next exhaust gas to enter and the desulfurization process.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A tail gas desulfurization device for zinc oxide production, comprising a base (1), a pretreatment tank (8) and a desulfurization tank (12), wherein the pretreatment tank (8) and the desulfurization tank (12) are both fixed to the top of the base (1), characterized in that: An air inlet (9) is provided on one side of the pretreatment tank (8), a first exhaust port (10) is provided on the other side of the pretreatment tank (8), a second exhaust port (18) is provided on the top of the desulfurization tank (12), a gas transmission pipe (17) is sealedly connected to one side of the first exhaust port (10), the bottom end of the gas transmission pipe (17) is located at the bottom of the desulfurization tank (12), sinking air holes (20) are equidistantly provided at the bottom of the gas transmission pipe (17), a flow guide cover (34) is fixed to the inner wall of the gas transmission pipe (17), the inner diameter of the top of the flow guide cover (34) is larger than the inner diameter of the bottom thereof, a support plate (43) is fixed below the flow guide cover (34), and a support plate (43) is inserted in the middle of the support plate (43) A lifting rod (44) is fixed with a conical plug (41) at the top of the lifting rod (44), the conical plug (41) is plugged into the bottom of the air guide cover (34), a pressure trigger (46) is fixed at the bottom of the lifting rod (44), a spring (45) is fixed between the support plate (43) and the pressure trigger (46), a suspension member (35) is fixed to the inner wall of the middle part of the gas transmission pipe (17), an electric push rod (42) is fixed to the bottom of the suspension member (35), a piston (39) is fixed to the bottom of the electric push rod (42), a pressure switch (36) is fixed to the top of the support plate (43), and the pressure switch (36) is located directly below the pressure trigger (46).

2. A tail gas desulfurization device for secondary zinc oxide production according to claim 1, characterized in that: The sinking air holes (20) are arranged in a ring shape around the center of the bottom of the gas transmission pipe (17), and the center distance between two adjacent sinking air holes (20) is equal. The bottom outer wall of the gas transmission pipe (17) is fixedly connected with three evenly distributed sieve plates (19), the diameter of the sieve plates (19) is equal to the inner diameter of the desulfurization tank (12), and the plate bodies of the three sieve plates (19) are all provided with sieve holes (33), and the sieve holes (33) on the three sieve plates (19) are staggered.

3. A tail gas desulfurization device for secondary zinc oxide production according to claim 1, characterized in that: The outer wall of the bottom of the air guide cover (34) is provided with an annular edge, and two columnar members are symmetrically provided at the bottom of the annular edge, and the support plate (43) is fixedly connected to the bottom of the two columnar members.

4. A tail gas desulfurization device for secondary zinc oxide production according to claim 1, characterized in that: A bellows (37) is fixedly connected between the suspension member (35) and the piston (39), and the electric push rod (42) is located inside the bellows (37).

5. A tail gas desulfurization device for secondary zinc oxide production according to claim 4, characterized in that: A sealing ring (40) is embedded in the middle of the piston (39), the bottom of the piston (39) is higher than the top of the sinking air hole (20), and the inner walls on both sides of the air delivery pipe (17) are fixedly connected to limit blocks (38), and the two limit blocks (38) are in contact with the top of the piston (39).

6. A tail gas desulfurization device for secondary zinc oxide production according to claim 1, characterized in that: The top of the base (1) is fixedly connected to a water pump seat (2), the top of the water pump seat (2) is fixedly connected to a water pump (3), a liquid extraction pipe (5) is provided at the water extraction end of the water pump (3), a liquid infusion pipe (4) is provided at the water discharge end of the water pump (3), and an end of the liquid infusion pipe (4) away from the water pump (3) is sealed and connected to the desulfurization tank (12).

7. A tail gas desulfurization device for secondary zinc oxide production according to claim 1, characterized in that: The inner wall in the middle of the desulfurization tank (12) is fixedly connected to a shell (21), the top of the shell (21) is fixedly connected to a connecting piece (25), the bottom of one end of the connecting piece (25) is fixedly connected to a guide rail (22), the body of the guide rail (22) is slidably connected to a sliding sleeve (26), the outer wall on one side of the sliding sleeve (26) is fixedly connected to an extension plate (27), the bottom of the extension plate (27) is fixedly connected to a float (23), and the body of the float (23) is provided with evenly distributed air holes (24).

8. A tail gas desulfurization device for secondary zinc oxide production according to claim 7, characterized in that: A mounting member (28) is fixedly connected to a side of the sliding sleeve (26) away from the extension plate (27); a power-off switch (29) is fixedly connected to the top of the mounting member (28); a power-off trigger member (30) is fixedly connected to the inner wall at the top of the housing (21); the power-off switch (29) is located directly below the power-off trigger member (30); a power-on switch (31) is fixedly connected to the bottom of the mounting member (28); a power-on trigger member (32) is fixedly connected to the inner wall at the bottom of the housing (21); and the power-on switch (31) contacts the top of the power-on trigger member (32).

9. A tail gas desulfurization device for secondary zinc oxide production according to claim 1, characterized in that: A first bracket (6) is fixedly connected to the top of the base (1) on the side close to the pretreatment tank (8), a first support leg (7) is fixedly connected to the outer wall of the bottom of the pretreatment tank (8), the first support leg (7) is fixedly connected to the top of the first bracket (6), and a second support leg (11) is fixedly connected to the outer wall of the bottom of the desulfurization tank (12), the second support leg (11) is fixedly connected to the top of the base (1).

10. A tail gas desulfurization device for secondary zinc oxide production according to claim 9, characterized in that: The outer wall of the desulfurization tank (12) is fixedly connected to a maintenance platform (14), the bottom of the maintenance platform (14) is fixedly connected to a second bracket (13), the second bracket (13) is fixedly connected to the top of the base (1), and one side of the maintenance platform (14) is fixedly connected to a maintenance ladder (15).

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