An acid mist treatment tower that is easy to clean

Abstract

This utility model relates to the field of waste gas treatment technology and discloses an easy-to-clean acid mist treatment tower, including a spray tower. A connecting pipe is fixedly connected to the inner wall of the spray tower, and multiple nozzles are fixedly connected to the lower surface of the connecting pipe. A water pipe is fixedly connected to the outer wall of the connecting pipe, and a flange is fixedly connected to the outer wall of the water pipe. A sealing gasket is provided between two flanges, and a quick-release assembly is provided on the outside of the flanges. The quick-release assembly includes a fixing ball disposed inside the flange, a fixing block is fixedly connected to the outer wall of one of the flanges, and a quick-release rod is slidably connected to the inner wall of the flange. A threaded rod is threadedly connected to the inner wall of the quick-release rod, and a conical block is rotatably connected to one end of the threaded rod. This utility model enables the disassembly and reassembly of the spray device without the aid of special tools, significantly simplifying the cleaning operation process. This structure avoids the problem of needing to break open or enter the spray tower for cleaning.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, and in particular to an acid mist treatment tower that is easy to clean. Background Technology

[0002] With increasingly stringent environmental protection requirements in industrial production, acid mist treatment towers, as the primary equipment for treating acidic waste gases, are widely used in industries such as electroplating, circuit boards, and chemicals. Their basic function is to purify waste gas by chemically reacting the absorbent with acidic components (such as HCl and H2SO4). To improve purification efficiency, most acid mist treatment towers employ a multi-stage spraying and packing layer synergistic treatment method to achieve highly efficient absorption of pollutants in the waste gas. However, as the equipment operates for longer periods, the interior of the acid mist tower, especially the spraying devices, is prone to scale buildup, crystallization, or blockage, leading to a gradual increase in cleaning and maintenance frequency. This places higher demands on the maintainability of the spraying pipelines and their accessories. Therefore, developing an acid mist treatment tower with a structure that is easier to clean, simpler to maintain and operate, and suitable for complex operating conditions is of great significance.

[0003] Currently, common acid mist treatment towers typically employ a vertical cylindrical structure with multiple layers of packing material and a spray system. Alkaline absorbent liquid (such as sodium hydroxide solution) is sprayed into the tower through multi-stage nozzles to neutralize the acidic components in the exhaust gas. The gas enters from the bottom of the tower, reacts fully with the liquid as it passes through the packing layer, and finally exits from the top. To improve purification efficiency, some structures also include demisters and filter plates to remove entrained droplets or particulate matter. The equipment typically relies on a circulating pump to continuously deliver the absorbent liquid to the spray system. After neutralization, the absorbent liquid falls back into a bottom storage tank and is periodically replaced or replenished. This type of device has a mature structure and relatively low cost, making it suitable for most low- to medium-concentration acid mist treatment scenarios. However, in practical use, its mechanical structure also presents some operational and maintenance challenges.

[0004] Despite the widespread use of existing acid mist treatment tower structures, several problems remain. A prominent issue is that spray pipes and nozzles are typically installed using fixed welding, requiring the disassembly of numerous external components during cleaning, sometimes necessitating manual access inside the tower – a time-consuming, labor-intensive process that also poses safety risks. Furthermore, over long-term use, spray nozzles are prone to clogging due to crystallization of the absorbent at low temperatures, increasing maintenance frequency; filter plates are often bolted, which are susceptible to corrosion in acidic environments, making disassembly difficult; and poorly designed drain ends allow large particles in the exhaust gas to accumulate and clog the circulation path. Simultaneously, the continuous consumption of large amounts of alkali and water keeps operating costs high. Therefore, optimizing the pipe connection structure to enable quick disassembly and convenient cleaning of key components is crucial for improving equipment operating efficiency and safety. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an acid mist treatment tower that is easy to clean. It aims to improve the existing structure where nozzles and pipes are mostly fixed and welded, requiring the disassembly of a large number of parts and even entry into the tower for cleaning, which leads to time-consuming and safety risks.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an easy-to-clean acid mist treatment tower, comprising a spray tower, wherein a connecting pipe is fixedly connected to the inner wall of the spray tower, a plurality of nozzles are fixedly connected to the lower surface of the connecting pipe, a water pipe is fixedly connected to the outer wall of the connecting pipe, a flange is fixedly connected to the outer wall of the water pipe, a sealing gasket is provided between the two flanges, and a quick-release assembly is provided on the outside of the flange.

[0007] The quick-release assembly includes a fixed ball disposed inside a flange. A fixed block is fixedly connected to the outer wall of one of the flanges. A quick-release rod is slidably connected to the inner wall of the flange. A threaded rod is threadedly connected to the inner wall of the quick-release rod. A tapered block is rotatably connected to one end of the threaded rod. A fixed groove is provided on the inner wall of the fixed block. The tapered block fits against the fixed ball.

[0008] Furthermore, each end of the water pipe is fixedly connected to an outlet pipe, the outer wall of the outlet pipe is fixedly connected to a self-cleaning mesh filter, the upper surface of the self-cleaning mesh filter is fixedly connected to a motor, the output end of the motor is fixedly connected to a rotating shaft, the outer wall of the rotating shaft is fixedly connected to a connecting rod, the outer wall of the connecting rod is fixedly connected to a brush, the inside of the rotating shaft is provided with a fine filter screen and a coarse filter screen, the outer wall of the rotating shaft is fixedly connected to a backwash solenoid valve, and the outer wall of the rotating shaft is fixedly connected to an inlet pipe.

[0009] Furthermore, an air inlet pipe is fixedly connected to the outer wall of the spray tower, and a drain pipe is fixedly connected to the outer wall of the spray tower.

[0010] Furthermore, an exhaust pipe is fixedly connected to the upper surface of the spray tower, and a fan is fixedly connected to one end of the exhaust pipe.

[0011] Furthermore, an observation window is fixedly connected to the outer wall of the spray tower, and a demisting net is fixedly connected to the inner wall of the spray tower.

[0012] Furthermore, a flow sensor is fixedly connected to the outer wall of the drain pipe, and a water tank is fixedly connected to one end of the drain pipe.

[0013] Furthermore, a water pump is installed on the outer wall of the water tank. The input end of the water pump is fixedly connected to the outer wall of the water tank, and the output end of the water pump is fixedly connected to a second water pipe. One end of the second water pipe is fixedly connected to the outer wall of the inlet pipe.

[0014] Furthermore, the outer wall of the fixed ball is slidably connected to the inner wall of the fixed block, and the outer wall of the fixed ball is slidably connected to the inner wall of the quick-release lever.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, by setting a nozzle connection structure consisting of a flange, a sealing gasket, and a quick-release assembly, reliable sealing and quick disassembly are achieved between the connecting pipe and the external water pipe. The quick-release assembly consists of a fixed ball, a quick-release rod, a threaded rod, a conical block, and a fixing block. It can complete the disassembly and reassembly of the spray device without the aid of special tools, which significantly simplifies the cleaning operation process. Compared with the traditional welding fixing method, this structure avoids the problem of having to break down or enter the spray tower to work during cleaning, reduces the cleaning difficulty and maintenance cost, and improves the safety and efficiency of the operation.

[0017] 2. In this utility model, a self-cleaning mesh filter is added at the outlet of the circulating liquid. The motor drives the rotating shaft to rotate the brush and clean the filter screen. At the same time, the backwashing solenoid valve and water inlet pipe set on the rotating shaft realize the automatic backwashing function. The filter is equipped with coarse and fine filter screens, which can effectively intercept dust, rust particles and chemical precipitates entrained in the circulating liquid, prevent them from clogging the nozzles or depositing in the tower, and ensure the stable operation of the spraying device. This structure can automatically complete the cleaning without interrupting the operation of the equipment, avoid frequent manual maintenance, reduce the downtime of the device, and improve the overall operating efficiency and service life of the equipment. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of an acid mist treatment tower that is easy to clean, as proposed in this utility model.

[0019] Figure 2 This is a schematic diagram of the spray tower part of an acid mist treatment tower that is easy to clean, as proposed in this utility model.

[0020] Figure 3 This is a schematic diagram of the self-cleaning mesh filter section of an acid mist treatment tower that is easy to clean, as proposed in this utility model.

[0021] Figure 4 This is a schematic diagram of the flange portion of an acid mist treatment tower that is easy to clean, as proposed in this utility model.

[0022] Figure 5 This is a schematic diagram of the quick-release rod section of an acid mist treatment tower that is easy to clean, as proposed in this utility model.

[0023] Legend:

[0024] 1. Spray tower; 2. Air inlet pipe; 3. Observation window; 4. Exhaust pipe; 5. Fan; 6. Water pipe one; 7. Flange; 8. Drain pipe; 9. Flow sensor; 10. Water tank; 11. Water pump; 12. Water pipe two; 13. Self-cleaning mesh filter; 14. Motor; 15. Demisting screen; 16. Connecting pipe; 17. Nozzle; 18. Rotating shaft; 19. Connecting rod; 20. Backwash solenoid valve; 21. Water outlet pipe; 22. Water inlet pipe; 23. Brush; 24. Coarse filter screen; 25. Fine filter screen; 26. Fixing block; 27. Quick release rod; 28. Threaded rod; 29. ​​Sealing gasket; 30. Conical block; 31. Fixing ball; 32. Fixing groove. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Reference Figure 1 - Figure 5 This utility model provides an embodiment of an acid mist treatment tower that is easy to clean, including a spray tower 1. The spray tower 1 is the main structure of the acid mist treatment device, and is equipped with spray components, demisting components, etc., for accommodating the contact reaction between acidic waste gas and absorbent liquid, completing gas-liquid mixing and purification. A connecting pipe 16 is fixedly connected to the inner wall of the spray tower 1, and multiple nozzles 17 are fixedly connected to the lower surface of the connecting pipe 16. The nozzles 17 are evenly arranged below the connecting pipe 16 for atomizing the absorbent liquid and spraying it into the waste gas to achieve effective gas-liquid contact and purification reaction. A water pipe 6 is fixedly connected to the outer wall of the connecting pipe 16, and a flange 7 is fixedly connected to the outer wall of the water pipe 6. A sealing gasket 29 is provided between the two flanges 7 for sealing the connection between the water pipe 6 and the connecting pipe 16 to prevent the spray liquid from leaking. A quick-release component is provided on the outside of the flange 7.

[0027] The quick-release assembly includes a retaining ball 31, located inside the flange 7, serving as a quick-release connector. It is clamped and positioned by a tapered block 30 inserted into a retaining groove 32. The retaining ball 31 is located inside the flange 7. A retaining block 26 is fixedly connected to the outer wall of one flange 7, and a quick-release rod 27 is slidably connected to the inner wall of the flange 7. The quick-release rod 27 slides against the inner wall of the flange 7, driving a threaded rod 28 and the tapered block 30 to move, completing quick-release or disassembly operations. A threaded rod 28 is threadedly connected to the inner wall of the quick-release rod 27, with one end of the threaded rod 28 rotatably connected to the tapered block 30. A retaining groove 32 is formed in the inner wall of the retaining block 26, serving as a locking structure for the engagement of the tapered block 30 and the retaining ball 31, ensuring the stability and reliability of the quick-release structure. The tapered block 30 and the retaining ball 31 fit together.

[0028] Reference Figure 1 - Figure 5One end of water pipe 6 is fixedly connected to water outlet pipe 21. Water outlet pipe 21 transports water treated by self-cleaning mesh filter 13 to connecting pipe 16, and then sprays it through nozzle 17, forming a closed-loop circulation device. Self-cleaning mesh filter 13 is fixedly connected to the outer wall of water outlet pipe 21. Motor 14 is fixedly connected to the upper surface of self-cleaning mesh filter 13. Motor 14 is installed on the top of self-cleaning mesh filter 13 and provides driving power to rotating shaft 18, causing brush 23 to rotate and continuously clean the filter surface. The output end of motor 14 is fixedly connected to rotating shaft 18. Connecting rod 19 is fixedly connected to the outer wall of rotating shaft 18. A brush 23 is fixedly connected to the outer wall of the rotating shaft 18. Its rotational motion cleans the surface of the filter screen, preventing impurities from accumulating and improving filtration efficiency. The rotating shaft 18 contains a fine filter screen 25 and a coarse filter screen 24. A backwashing solenoid valve 20 is fixedly connected to the outer wall of the rotating shaft 18. The backwashing solenoid valve 20 controls the backwashing water flow in the inlet pipe 22. It opens when the pressure difference inside the self-cleaning mesh filter 13 reaches a set value, achieving backwashing of the filter screen and removing impurities. An inlet pipe 22 is fixedly connected to the outer wall of the rotating shaft 18, an air inlet pipe 2 is fixedly connected to the outer wall of the spray tower 1, and a drain pipe 8 is fixedly connected to the outer wall of the spray tower 1. An exhaust pipe 4 is fixedly connected to the surface of the spray tower 1, and is connected to the top of the spray tower 1. The exhaust pipe 4 discharges the treated clean gas outside the tower and serves as the outlet channel for the waste gas treatment device. A fan 5 is fixedly connected to one end of the exhaust pipe 4. An observation window 3 is fixedly connected to the outer wall of the spray tower 1, and a demister 15 is fixedly connected to the inner wall of the spray tower 1. The demister 15 is located in the upper part of the tower body and is used to intercept liquid droplets rising with the airflow, preventing liquid from entering the exhaust pipe 4 and keeping the discharged gas dry and clean. A flow sensor 9 is fixedly connected to the outer wall of the drain pipe 8. The flow sensor 9 is installed on the drain pipe 8 and is used to monitor the circulating water flow in real time to ensure stable operation of the device. As the basis for device alarm and control, one end of the drain pipe 8 is fixedly connected to the water tank 10. The outer wall of the water tank 10 is equipped with a water pump 11. The input end of the water pump 11 is fixedly connected to the outer wall of the water tank 10. The water tank 10 is used to store the spray liquid for recycling, which serves as the liquid source for the pumping device and is also used to settle some impurities. The output end of the water pump 11 is fixedly connected to the second water pipe 12. One end of the second water pipe 12 is fixedly connected to the outer wall of the inlet pipe 22. The inlet pipe 22 is connected to the second water pipe 12 to provide a clean water source for the backwashing device. The outer wall of the fixed ball 31 is slidably connected to the inner wall of the fixed block 26. The outer wall of the fixed ball 31 is slidably connected to the inner wall of the quick release rod 27.

[0029] Working principle: When an easy-to-clean acid mist treatment tower is required, multiple nozzles 17 are provided below the internal connecting pipe 16 of the spray tower 1 for uniformly spraying the treatment liquid. The connecting pipe 16 is connected to the external water system through water pipe 6. Water pipe 6 and outlet pipe 21 are connected by flange 7, and a sealing gasket 29 is provided to ensure a sealing effect. The two flanges 7 are detachably connected by a quick-release assembly. The quick-release rod 27 is internally threaded to a threaded rod 28, and one end of the quick-release rod 28 is provided with a tapered block 30. The tapered block 30 can be released from the threaded rod 28. The fixed ball 31 is squeezed by the push of the 8, causing it to slide into the fixing groove 32 inside the fixing block 26 and be fixed. When disassembling, the threaded rod 28 is rotated in the opposite direction, causing the conical block 30 to slide horizontally and the fixed ball 31 to slide out from inside the fixing block 26, thus unlocking the flange 7 and quickly connecting or separating it. Compared with the traditional welded spray pipeline, this structure can remove the nozzle 17 and pipeline components without disassembling the whole structure, and directly perform high-pressure flushing or chemical cleaning outside the tower, which greatly reduces labor costs and operational risks.

[0030] In addition, to prevent nozzle 17 from becoming clogged or packing material from impurities such as dust, rust, or reagent precipitates in the circulating liquid during the operation of the acid mist treatment tower, a self-cleaning mesh filter 13 is installed at the outlet pipe 21 to effectively intercept and automatically remove impurities. The self-cleaning mesh filter 13 contains a coarse filter 24 and a fine filter 25 to classify and intercept solid impurities entering the device according to particle size, ensuring the cleanliness of the fluid entering the spraying device. Its working principle is based on a cyclic process of "filtration—impurity interception—automatic cleaning—sewage discharge": when the circulating liquid flows through the self-cleaning mesh filter 13, suspended impurities are effectively intercepted by the filtration unit, and the purified fluid enters the downstream spraying device. As the operating time increases, the impurities accumulated on the filter surface increase, causing the pressure difference across the filter to gradually increase or reach a set threshold; at this time, the control device automatically triggers a cleaning command, driving the motor 14 to rotate the shaft 18. The connecting rod 19 and brush 23 mechanically scrub the filter surface, while the backwash solenoid valve 20 opens to flush away impurities with the water flow into the drain channel. After cleaning, the device returns to normal filtration without manual disassembly or intervention, greatly improving the operating efficiency and continuity of the filtration device. Furthermore, the device can be equipped with an online monitoring module, flow sensor 9, and tower differential pressure sensor to monitor the filtration effect and operating status in real time. When abnormal monitoring data occurs, such as a decrease in spray flow or an abnormal increase in tower differential pressure, the device will automatically trigger an early warning or initiate the cleaning process in advance, further reducing the risk of equipment operation due to blockage. By controlling impurities at the source and automating the entire process, the lifespan of the nozzle 17 and tower components is significantly extended, the cleaning frequency is reduced, and device malfunctions or damage caused by excessive deposition are effectively avoided, improving the stability and safety of the acid mist treatment device.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An acid mist treatment tower that is easy to clean, comprising a spray tower (1), characterized in that: The inner wall of the spray tower (1) is fixedly connected to a connecting pipe (16), and a plurality of nozzles (17) are fixedly connected to the lower surface of the connecting pipe (16). A water pipe (6) is fixedly connected to the outer wall of the connecting pipe (16), and a flange (7) is fixedly connected to the outer wall of the water pipe (6). A sealing gasket (29) is provided between the two flanges (7), and a quick-release assembly is provided on the outside of the flange (7). The quick-release assembly includes a fixed ball (31) which is disposed inside a flange (7). A fixed block (26) is fixedly connected to the outer wall of one of the flanges (7). A quick-release rod (27) is slidably connected to the inner wall of the flange (7). A threaded rod (28) is threadedly connected to the inner wall of the quick-release rod (27). A conical block (30) is rotatably connected to one end of the threaded rod (28). A fixed groove (32) is provided on the inner wall of the fixed block (26). The conical block (30) fits against the fixed ball (31).

2. An acid mist treatment tower for ease of cleaning according to claim 1, characterized in that: One end of the water pipe (6) is fixedly connected to a water outlet pipe (21). A self-cleaning mesh filter (13) is fixedly connected to the outer wall of the water outlet pipe (21). A motor (14) is fixedly connected to the upper surface of the self-cleaning mesh filter (13). A rotating shaft (18) is fixedly connected to the output end of the motor (14). A connecting rod (19) is fixedly connected to the outer wall of the rotating shaft (18). A brush (23) is fixedly connected to the outer wall of the connecting rod (19). A fine filter screen (25) and a coarse filter screen (24) are provided inside the rotating shaft (18). A backwashing solenoid valve (20) is fixedly connected to the outer wall of the rotating shaft (18). An inlet pipe (22) is fixedly connected to the outer wall of the rotating shaft (18).

3. An acid mist treatment tower for ease of cleaning according to claim 2, characterized in that: The spray tower (1) is fixedly connected to the outer wall of the air inlet pipe (2) and the spray tower (1) is fixedly connected to the outer wall of the air inlet pipe (8).

4. An acid mist treatment tower for ease of cleaning according to claim 2, characterized in that: An exhaust pipe (4) is fixedly connected to the upper surface of the spray tower (1), and a fan (5) is fixedly connected to one end of the exhaust pipe (4).

5. An acid mist treatment tower for ease of cleaning according to claim 2, characterized in that: An observation window (3) is fixedly connected to the outer wall of the spray tower (1), and a demisting net (15) is fixedly connected to the inner wall of the spray tower (1).

6. An acid mist treatment tower for ease of cleaning according to claim 3, characterized in that: A flow sensor (9) is fixedly connected to the outer wall of the drain pipe (8), and a water tank (10) is fixedly connected to one end of the drain pipe (8).

7. An acid mist treatment tower for ease of cleaning according to claim 6, characterized in that: A water pump (11) is provided on the outer wall of the water tank (10). The input end of the water pump (11) is fixedly connected to the outer wall of the water tank (10). The output end of the water pump (11) is fixedly connected to a second water pipe (12). One end of the second water pipe (12) is fixedly connected to the outer wall of the inlet pipe (22).

8. An acid mist treatment tower for ease of cleaning according to claim 2, characterized in that: The outer wall of the fixed ball (31) is slidably connected to the inner wall of the fixed block (26), and the outer wall of the fixed ball (31) is slidably connected to the inner wall of the quick release rod (27).

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