A spraying mechanism for hot-dip galvanizing exhaust gas treatment

Abstract

This invention provides a spray mechanism for treating hot-dip galvanizing exhaust gas, relating to the field of hot-dip galvanizing exhaust gas treatment technology. It includes a converging pipe and a stopping pipe that work together to divide the exhaust gas into three layers, generating forward and reverse rotation and cross-impact. A pressure control mechanism, through the cooperation of a pressure equalizing pipe, enables adaptive adjustment of the spray pressure according to the air pressure. This mechanism utilizes a double-conical pipe and a concentric pipe to divide the exhaust gas into three layers. The first layer of exhaust gas rotates forward through a clockwise vane, carrying the spray liquid towards the axis. The second layer of exhaust gas diffuses outward along the expansion pipe, forming a radial impact with the first layer. The third layer of exhaust gas is compressed by the converging pipe and then rotates counter-clockwise through the counter-clockwise pipe, impacting the second layer of exhaust gas. This allows the gas and liquid phases to mix thoroughly in multiple turbulent flows. Simultaneously, the pressure equalizing pipe feeds back the air pressure to the pressure control mechanism to dynamically adjust the spray pressure. This effectively solves the problems of insufficient gas-liquid mixing and wasted spray liquid in traditional transverse spray towers, significantly improving exhaust gas purification efficiency and operational economy.

Description

Technical Field

[0001] This invention relates to the field of hot-dip galvanizing exhaust gas treatment technology, and more specifically, to a spray mechanism for hot-dip galvanizing exhaust gas treatment. Background Technology

[0002] In existing technologies, hot-dip galvanizing exhaust gas treatment devices mostly adopt a horizontal spray tower structure, in which exhaust gas enters a long cylindrical treatment pipe in a horizontal direction, and multiple sets of spray nozzles are arranged axially on the inner wall of the pipe. The absorbent liquid is directly sprayed into the pipe from the spray nozzles to mix with the exhaust gas. However, in this straight-through spray method, the exhaust gas often passes through the pipe axis at a high flow rate. The spray droplets are quickly settled at the bottom of the pipe due to gravity. The gas and liquid phases are distributed very unevenly in the cross-section, resulting in most of the exhaust gas passing through only the central area of ​​the pipe quickly and being discharged from the outlet without sufficient contact with the droplets, resulting in low mass transfer efficiency.

[0003] Due to the lack of structures that can force the waste gas and the spray liquid to generate lateral turbulence or extend the contact path, the existing transverse spray towers have very limited effect on capturing dust and acidic components in the waste gas. This not only results in the waste of spray liquid and substandard treatment, but also increases energy consumption and equipment size due to the need for repeated recycling. It is difficult to meet the dual requirements of efficient waste gas treatment and compact layout of hot-dip galvanizing production lines. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides a spray mechanism for treating hot-dip galvanizing exhaust gas, thereby solving the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a spraying mechanism for treating hot-dip galvanizing exhaust gas, comprising a fixedly installed treatment pipe; and further comprising a flow turbulence mechanism and a pressure control mechanism; The turbulence mechanism includes multiple fixing rings fixedly installed on the circular inner wall of the processing tube. The circular inner wall of each fixing ring is connected to a double conical tube through a side plate. Multiple clockwise rotating blades are evenly spaced on the outer wall of the end of the double conical tube away from the fixing ring. A contraction tube is fixedly connected to the end of the multiple clockwise rotating blades away from the double conical tube, and the contraction tube is fixedly connected to the inner wall of the processing tube. A ring nozzle is coaxially arranged on the outer wall of the plane with the largest diameter of the double conical tube. Multiple sets of spray holes are evenly spaced on the annular outer wall of the ring nozzle.

[0006] Preferably, the turbulence mechanism further includes a concentric tube coaxially disposed within the double conical tube, and the outer wall of the concentric tube and the inner wall of the double conical tube near the fixed ring are connected by multiple connecting plates.

[0007] Preferably, the concentric tube is coaxially connected to the end of the expansion tube with the smallest diameter on one side of the contraction tube, and multiple sets of counter-rotating tubes are equally spaced on the inner wall of the expansion tube, and the counter-rotating tubes and the outer end face of the expansion tube form a conformal opening.

[0008] Preferably, the inner wall of the concentric tube away from the expansion tube is connected to the shrinking tube and is the end with the largest diameter of the shrinking tube, the end with the smallest diameter of the shrinking tube is connected to the stop tube, and the side of the stop tube away from the shrinking tube is circularly sealed.

[0009] Preferably, one end of the plurality of counter-rotating tubes converges toward the axis and is connected to one side of the circular end face of the stop tube.

[0010] Preferably, the upper end of the annular spray pipe is connected to a vertical pipe, a plurality of vertical pipes are fixedly connected to the side wall of the vertical pipe and pass through the vertical pipe, the plurality of vertical pipes are respectively connected to the water inlet pipe, and the lower end face of the treatment pipe is connected to a water outlet pipe.

[0011] Preferably, an air inlet pipe is connected to the end of the treatment pipe away from the water outlet pipe, a fan is installed inside the air inlet pipe, and an air outlet is provided at the end of the air inlet pipe near the water outlet pipe.

[0012] Preferably, the pressure control mechanism includes a constant pressure pipe connected to the side near the air inlet pipe, an overflow pipe connected to the outer wall of the constant pressure pipe, and a stop disc coaxially disposed inside the constant pressure pipe.

[0013] Preferably, the constant pressure pipe is internally threaded with an adjusting pipe, and a connecting rod is slidably mounted coaxially inside the adjusting pipe. A one-way disc is mounted on one end of the connecting rod near the stop disc, and the one-way disc is attached to the stop disc. A sealing ring is coaxially mounted on one end of the adjusting pipe near the stop disc, and the circular outer wall of the sealing ring is slidably connected to the inner wall of the constant pressure pipe. A spring is sleeved on the outer wall of the connecting rod, one end of the spring abutting against the sealing ring, and the other end of the spring pressing against the one-way disc.

[0014] Preferably, the constant pressure tube is connected to a pressure sleeve via an external rod, a pressure plate is slidably connected inside the pressure sleeve, the connecting rod passes through the pressure sleeve and is connected to the pressure plate, and a pressure equalizing tube is connected to the side wall of the pressure sleeve, which is connected to the outer wall of the processing tube.

[0015] Compared with the prior art, the present invention provides a spray mechanism for treating hot-dip galvanizing exhaust gas, which has the following beneficial effects: This invention utilizes a three-layer diversion channel composed of a double-conical tube and a concentric tube in the turbulence mechanism to guide exhaust gas to different paths and assign each layer a unique direction of motion. The first layer of exhaust gas, after contraction and acceleration, is rotated forward by the clockwise vane and carries the spray liquid towards the axis. The second layer of exhaust gas diffuses outward along the expansion tube and forms a radial cross impact with the first layer. The third layer of exhaust gas is compressed by the convergence tube and then rotates in the opposite direction to the first layer by the counter-rotation tube, impacting the second layer of exhaust gas. This creates a strong turbulent flow with opposite directions and staggered velocities in the convergence area. During this process, the spray liquid is repeatedly torn, entrained, and recombined, significantly increasing the gas-liquid contact area and contact time, thereby significantly improving the collection efficiency of dust and acidic components and solving the problem of insufficient gas-liquid mixing in traditional direct-flow spraying.

[0016] The pressure control mechanism constructed in this invention introduces the air pressure in the treatment pipe into the pressure sleeve through the pressure pipe and acts on the pressure plate. The connecting rod transmits the additional thrust generated by the air pressure to the one-way disc. When the air pressure increases, the opening assistance of the one-way disc increases, the overflow pressure threshold automatically rises, and the spray volume increases accordingly to match the demand for more spray liquid under high wind speed. When the air pressure decreases, the spray volume decreases synchronously, realizing the dynamic tracking of the spray supply and the exhaust gas treatment load. At the same time, the basic overflow pressure can be set by adjusting the spring pre-compression amount through the regulating pipe, so that the spray system can maintain efficient and low-consumption operation under different working conditions, effectively avoiding the excessive use and waste of spray liquid.

[0017] This invention combines the forced turbulent mixing of the turbulence-inducing mechanism with the adaptive liquid supply of the pressure-controlled mechanism, enabling the waste gas treatment process to achieve excellent gas-liquid mass transfer conditions and realize on-demand supply of spray liquid. The spiral angles of the clockwise and counterclockwise tubes in the turbulence-inducing mechanism can be optimized according to the composition of the waste gas. The orifice diameter and distribution on the ring nozzle can be adjusted according to actual needs. The spring stiffness of the pressure-controlled mechanism can be selected according to the pressure of the liquid supply system. All components adopt a modular design for easy installation and maintenance. This invention provides a compact, highly efficient, and low-cost transverse spray waste gas treatment solution for hot-dip galvanizing production lines. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a spray mechanism for treating hot-dip galvanizing exhaust gas according to the present invention. Figure 2 In this invention Figure 1 A schematic diagram of the cross-sectional structure; Figure 3 This is a schematic diagram of the double conical tube structure in this invention; Figure 4 This is a schematic diagram of the side structure of the double conical tube in this invention; Figure 5 In this invention Figure 4 A schematic diagram of the cross-sectional structure; Figure 6 This is a schematic diagram of the pressure regulating tube in this invention; Figure 7 In this invention Figure 6 A schematic diagram of the cross-sectional structure; Figure 8 This is a schematic diagram of the regulating tube in this invention.

[0019] In the diagram: 11. Processing pipe; 21. Flow control mechanism; 22. Fixing ring; 23. Double cone pipe; 24. Co-rotating vane; 25. Contraction pipe; 26. Ring nozzle; 27. Nozzle; 28. Concentric pipe; 29. ​​Expansion pipe; 31. Pressure control mechanism; 32. Pressure regulating pipe; 33. Overflow pipe; 34. Stop plate; 35. Adjusting pipe; 36. Connecting rod; 37. One-way disc; 38. Sealing ring; 39. Spring; 210. Counter-rotating pipe; 211. Conforming nozzle; 212. Closing pipe; 213. Stop pipe; 214. Vertical pipe; 215. Water inlet pipe; 216. Water outlet pipe; 217. Air inlet pipe; 218. Fan; 219. Air outlet; 310. Pressure sleeve; 311. Pressure plate; 312. Pressure equalizing pipe. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0022] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0023] Please see Figures 1 to 8 This embodiment provides a spray mechanism for treating hot-dip galvanizing exhaust gas. This mechanism aims to solve the technical problems of insufficient mixing of exhaust gas and spray liquid and low mass transfer efficiency in existing horizontal spray towers. By integrating a turbulence mechanism with multi-stage diversion, forward and reverse swirl and impact disturbance, and a pressure control mechanism that dynamically adjusts the spray pressure according to the wind pressure, forced turbulent mixing and adaptive matching of exhaust gas and spray liquid are achieved, which significantly improves the exhaust gas purification efficiency.

[0024] 1. Overall structure and initial state The spraying mechanism for treating hot-dip galvanized exhaust gas includes a fixed treatment pipe 11 as a treatment channel, and a flow turbulence mechanism 21 and a pressure control mechanism 31 installed in the treatment pipe 11. The flow turbulence mechanism 21 is used to guide the exhaust gas and spray liquid into the multi-stage channel to generate forward and reverse rotation and cross impact. The pressure control mechanism 31 is used to automatically adjust the spraying pressure according to the air inlet pressure to avoid waste.

[0025] 2. Composition of the core system 2.1 Aerodynamic spoiler 21 The turbulence mechanism 21 is the core unit for achieving forced gas-liquid mixing. It includes multiple fixing rings 22 fixedly installed on the circular inner wall of the processing pipe 11. The circular inner wall of each fixing ring 22 is connected to a double conical tube 23 via a side plate. Multiple clockwise rotating blades 24 are evenly spaced on the outer wall of the end of the double conical tube 23 away from the fixing rings 22. A contraction tube 25 is fixedly connected to the end of the multiple clockwise rotating blades 24 away from the double conical tube 23, and the contraction tube 25 is fixedly connected to the inner wall of the processing pipe 11. The largest diameter of the double conical tube 23 is... A ring nozzle 26 is coaxially arranged on the outer wall of the surface. Multiple sets of nozzle holes 27 are equally spaced on the annular outer wall of the ring nozzle 26. The turbulence mechanism 21 also includes a concentric tube 28 coaxially arranged inside the double cone tube 23. The outer wall of the concentric tube 28 is connected to the inner wall of the double cone tube 23 near the fixed ring 22 by multiple connecting plates. The concentric tube 28 is located on one side of the contraction tube 25 and is coaxially connected to the end of the expansion tube 29 with the smallest diameter. Multiple sets of counter-rotating tubes 210 are equally spaced on the inner wall of the expansion tube 29 and rotate in the opposite direction. The outer end faces of tube 210 and expansion tube 29 form a conformal orifice 211. A convergence tube 212 is connected to the inner wall of the concentric tube 28 on the side away from the expansion tube 29, with the largest diameter end of the convergence tube 212 connected to the concentric tube 28. The smallest diameter end of the convergence tube 212 is connected to a stop tube 213, with the side of the stop tube 213 away from the convergence tube 212 being a circular seal. The ends of multiple counter-rotating tubes 210 that converge towards the axis are connected to one side of the circular end face of the stop tube 213. The upper end of the annular nozzle 26 is connected to... The process is provided with vertical pipes 214, and multiple vertical pipes 214 are fixedly connected to the side wall of the processing pipe 11 and pass through the processing pipe 11. The multiple vertical pipes 214 are respectively connected to the water inlet pipe 215. The water outlet pipe 216 is connected to the lower end face of the processing pipe 11. The end of the processing pipe 11 away from the water outlet pipe 216 is connected to the air inlet pipe 217. The air inlet pipe 217 is provided with a fan 218 for providing air pressure. The end of the air inlet pipe 217 near the water outlet pipe 216 is provided with an air outlet 219.

[0026] 2.2 Pressure Control Mechanism 31 The pressure control mechanism 31 is the core unit for achieving adaptive adjustment of the spray pressure. It includes a constant pressure pipe 32 connected to the side near the air inlet pipe 217. An overflow pipe 33 is connected and installed on the outer wall of the constant pressure pipe 32. A stop disc 34 is coaxially disposed inside the constant pressure pipe 32. An adjusting pipe 35 is threadedly connected inside the constant pressure pipe 32. A connecting rod 36 is coaxially slidably disposed inside the adjusting pipe 35. A one-way disc 37 is disposed at the end of the connecting rod 36 near the stop disc 34 and fits against the stop disc 34. A connecting rod 35 is coaxially disposed at the end of the adjusting pipe 35 near the stop disc 34. A sealing ring 38 is provided, and the outer circular wall of the sealing ring 38 is slidably connected to the inner wall of the constant pressure pipe 32. A spring 39 is sleeved on the outer wall of the connecting rod 36, and one end of the spring 39 abuts against the sealing ring 38 while the other end rests against the one-way disc 37. The constant pressure pipe 32 is connected to a pressure sleeve 310 through an external rod. A pressure plate 311 is slidably connected inside the pressure sleeve 310. The connecting rod 36 passes through the pressure sleeve 310 and is connected to the pressure plate 311. A pressure pipe 312 is connected to the side wall of the pressure sleeve 310, and the other end of the pressure pipe 312 is connected to the outer wall of the processing pipe 11.

[0027] 3. Working process and principle of the device The working process and principle of the spray mechanism for treating hot-dip galvanizing exhaust gas are as follows: When treating hot-dip galvanizing exhaust gas, the fan 218 sends the exhaust gas into the treatment pipe 11 through the inlet pipe 217 and applies initial air pressure. The pressurized exhaust gas first reaches the vicinity of the first double-cone pipe 23. The double-cone pipe 23 divides the flow area in the treatment pipe 11 into three layers of channels. The first layer is the annular channel between the fixed ring 22 and the double-cone pipe 23. The second layer is the annular channel between the double-cone pipe 23 and the concentric pipe 28. The third layer is the channel of the converging pipe 212 inside the concentric pipe 28. The exhaust gas enters these three layers of channels simultaneously. The exhaust gas in the first layer contracts and accelerates along the conical surface of the double-cone pipe 23 and is blown toward the spray hole 27 on the annular spray pipe 26. The spray liquid enters the annular spray pipe 26 through the water inlet pipe 215 and the vertical pipe 214 and is sprayed out from the spray hole 27. It is carried by the high-speed exhaust gas into the contraction pipe 25 and the other end of the double-cone pipe 23. Furthermore, guided by the co-rotating plate 24, the exhaust gas containing the spray liquid rotates in the forward direction and converges towards the axis. The second layer of exhaust gas flows into the space between the double cone tube 23 and the concentric tube 28 and reaches the position of the expansion tube 29. It diffuses and sprays out along the expansion cone surface of the expansion tube 29 in a direction away from the axis, forming a radial cross impact with the first layer of converged exhaust gas. The third layer of exhaust gas is rapidly compressed through the converging tube 212, increasing the pressure. Then, it is sprayed out from the conformal nozzle 211 through multiple counter-rotating tubes 210, impacting the second layer of exhaust gas and causing it to rotate in the opposite direction to the first layer of exhaust gas. As a result, the first layer of exhaust gas and the second layer of exhaust gas not only have a radial impact at the intersection, but also generate strong turbulent disturbances due to their opposite rotation directions, which greatly promotes the mass transfer and mixing of the exhaust gas and the spray liquid. The treated gas is discharged through the outlet 219, and the spray liquid and the collected pollutants are discharged through the water outlet 216.

[0028] During the spray liquid supply process, the pressure control mechanism 31 automatically adjusts the spray pressure according to the air inlet pressure. When the spray liquid pressure exceeds the preload of the spring 39, the one-way disc 37 overcomes the spring force of the spring 39 and leaves the stop disc 34, and the spray liquid enters the treatment pipe 11. The overpressure portion overflows and is discharged through the overflow pipe 33. The compression of the spring 39 can be changed by rotating the adjustment pipe 35, thereby adjusting the overflow pressure threshold. At the same time, the pressure pipe 312 introduces the air pressure in the treatment pipe 11 into the pressure sleeve 310 and acts on the pressure plate 311. The pressure plate 311 transmits the additional thrust to the one-way disc 37 through the connecting rod 36. When the air pressure increases, the thrust of the connecting rod 36 on the one-way disc 37 increases, and the overflow pressure threshold rises accordingly. The spray volume automatically increases to match the mixing requirements under high wind speed. When the air pressure decreases, the spray volume decreases synchronously, thereby achieving dynamic matching between the spray liquid supply and the exhaust gas treatment load and avoiding waste of spray liquid.

[0029] Working principle summary: This invention uses the gas diversion and forward and reverse swirling design of the three-layer channel in the turbulence mechanism 21 to achieve forced turbulent mixing of exhaust gas and spray liquid in multi-stage cross impact. Through the linkage of the pre-tightening force of spring 39 and wind pressure feedback in the pressure control mechanism 31, the spray pressure is adaptively adjusted. The two work together to significantly improve the purification efficiency and operating economy of hot-dip galvanizing exhaust gas spray treatment.

[0030] Example 2 In another optional embodiment, the helical angles of the clockwise vane 24 and the counterclockwise tube 210 can be optimized according to the required turbulence intensity, the diameter of the nozzle 27 on the annular nozzle 26 can be varied circumferentially to adjust the spray distribution, the spring 39 can adopt different stiffness specifications to adapt to different working pressure ranges, and multiple sets of series-connected turbulence-inducing mechanisms can also be set in the processing tube 11 to extend the gas-liquid contact path.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0032] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spraying mechanism for treating hot-dip galvanizing exhaust gas, comprising a fixedly installed treatment pipe (11); characterized in that: It also includes a flow control mechanism (21) and a pressure control mechanism (31); The turbulence mechanism (21) includes multiple fixing rings (22) fixedly installed on the circular inner wall of the processing tube (11). The circular inner wall of each fixing ring (22) is connected to a double conical tube (23) through a side plate. Multiple clockwise rotating blades (24) are evenly spaced on the outer wall of the double conical tube (23) away from the fixing ring (22). A contraction tube (25) is fixedly connected to the end of the multiple clockwise rotating blades (24) away from the double conical tube (23). The contraction tube (25) is fixedly connected to the inner wall of the processing tube (11). A ring nozzle (26) is coaxially arranged on the outer wall of the plane with the largest diameter of the double conical tube (23). Multiple sets of spray holes (27) are evenly spaced on the annular outer wall of the ring nozzle (26).

2. The spraying mechanism for treating hot-dip galvanizing exhaust gas according to claim 1, characterized in that: The turbulence mechanism (21) also includes a concentric tube (28) coaxially disposed inside the double conical tube (23), and the outer wall of the concentric tube (28) and the inner wall of the double conical tube (23) near the fixing ring (22) are connected by multiple connecting plates.

3. The spraying mechanism for treating hot-dip galvanizing exhaust gas according to claim 2, characterized in that: The concentric tube (28) is coaxially connected to the end of the expansion tube (29) with the smallest diameter on one side of the contraction tube (25), and the inner wall of the expansion tube (29) is provided with multiple sets of counter-rotating tubes (210) at equal intervals, and the outer end face of the counter-rotating tube (210) and the expansion tube (29) forms a conformal opening (211).

4. The spraying mechanism for treating hot-dip galvanizing exhaust gas according to claim 3, characterized in that: The inner wall of the concentric tube (28) away from the expansion tube (29) is connected to the coiling tube (212) and is the end with the largest diameter of the coiling tube (212). The end with the smallest diameter of the coiling tube (212) is connected to the stop tube (213), and the side of the stop tube (213) away from the coiling tube (212) is a circular seal.

5. A spray mechanism for treating hot-dip galvanizing exhaust gas according to claim 4, characterized in that: One end of the multiple counter-rotating tubes (210) that converges toward the axis is connected to one side of the circular end face of the stop tube (213).

6. A spraying mechanism for treating hot-dip galvanizing exhaust gas according to claim 1, characterized in that: The upper end of the ring nozzle (26) is connected to a vertical pipe (214), and multiple vertical pipes (214) are fixedly connected to the side wall of the treatment pipe (11) and pass through the treatment pipe (11). Multiple vertical pipes (214) are respectively connected to the water inlet pipe (215), and a water outlet pipe (216) is connected to the lower end face of the treatment pipe (11).

7. A spraying mechanism for treating hot-dip galvanizing exhaust gas according to claim 6, characterized in that: The processing pipe (11) is connected to an air inlet pipe (217) at one end away from the water outlet pipe (216). A fan (218) is installed inside the air inlet pipe (217), and an air outlet (219) is provided at one end of the air inlet pipe (217) near the water outlet pipe (216).

8. A spray mechanism for treating hot-dip galvanizing exhaust gas according to claim 7, characterized in that: The pressure control mechanism (31) includes a constant pressure pipe (32) connected to the side near the air inlet pipe (217), an overflow pipe (33) is connected to the outer wall of the constant pressure pipe (32), and a stop plate (34) is coaxially arranged inside the constant pressure pipe (32).

9. A spraying mechanism for treating hot-dip galvanizing exhaust gas according to claim 8, characterized in that: The pressure regulating pipe (32) is internally threaded with an adjusting pipe (35). A connecting rod (36) is slidably arranged coaxially inside the adjusting pipe (35). A one-way disc (37) is provided at one end of the connecting rod (36) near the stop disc (34). The one-way disc (37) is attached to the stop disc (34). A sealing ring (38) is slidably arranged coaxially at one end of the adjusting pipe (35) near the stop disc (34). The circular outer wall of the sealing ring (38) is slidably connected to the inner wall of the pressure regulating pipe (32). A spring (39) is sleeved on the outer wall of the connecting rod (36). One end of the spring (39) abuts against the sealing ring (38), and the other end of the spring (39) pushes against the one-way disc (37).

10. A spraying mechanism for treating hot-dip galvanizing exhaust gas according to claim 9, characterized in that: The constant pressure tube (32) is connected to a pressure sleeve (310) via an external rod. A pressure plate (311) is slidably connected inside the pressure sleeve (310). The connecting rod (36) passes through the pressure sleeve (310) and is connected to the pressure plate (311). A pressure equalizing tube (312) is connected to the side wall of the pressure sleeve (310). The pressure equalizing tube (312) is connected to the outer wall of the processing tube (11).

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