A spray tower for exhaust gas treatment

Abstract

The utility model discloses a kind of waste gas treatment spray tower, and its technical solution main point is: including support base, the top of support base is fixedly connected with circulating tank, the top of circulating tank is fixedly connected with tower body, and the inside of tower body is fixedly connected with support disc;The outside of circulating tank is provided with filter spray component, and the cooperation use of lifting pump, PLV controller, feed pipe, discharge pipe, filter, locating ring and nozzle set by setting, after receiving start signal in lifting pump, liquid in circulating tank is pumped to the nozzle of tower top, nozzle atomizes liquid into fine droplet, evenly sprays in filler layer surface, by filter installed on circulating pipeline, solid particle carried in liquid can be intercepted, avoid that particle enters lifting pump inside with liquid, prevent its to precision component such as impeller, sealing element cause abrasion, jam or block, guarantee the long-term stable operation of lifting pump.

Description

Technical Field

[0001] This utility model relates to the field of waste gas technology, specifically to a waste gas treatment spray tower. Background Technology

[0002] In industrial production processes, such as metallurgy, chemical industry, building materials, metal surface treatment, thermal power generation, and waste incineration, large amounts of industrial waste gas containing solid or liquid particulate matter are inevitably generated. These particulate matter suspended in the gaseous medium are commonly referred to as dust, soot, or aerosols, and are one of the main factors causing air pollution and affecting human health.

[0003] The basic principle of spray tower treatment of particulate matter is as follows: the washing liquid is atomized into a large number of fine droplets through nozzles and adheres to the surface of the packing. When the exhaust gas enters from the bottom of the tower and flows upward, the particulate matter in the exhaust gas will come into full contact with the droplets and undergo physical or chemical reactions, thereby being captured by the droplets. Subsequently, the droplets carrying the particulate matter settle into the circulation box at the bottom of the tower due to gravity, while the purified gas is discharged from the top of the tower. In the existing technology, some spray towers do not effectively pre-treat the exhaust gas before it enters the spray tower, and it contains a high concentration of particulate matter. At the same time, a large amount of particulate matter also accumulates in the circulating washing liquid, which leads to increased liquid viscosity, increased risk of nozzle blockage, increased treatment load of the spray tower itself, and may also cause particulate matter to enter the pump body with the circulating liquid, causing wear and damage to the pump impeller, seals and other structures, thereby reducing the overall stability and treatment efficiency of the system. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a waste gas treatment spray tower.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A waste gas treatment spray tower includes a support base, a circulation box fixedly connected to the top of the support base, a tower body fixedly connected to the top of the circulation box, and a support plate fixedly connected inside the tower body. A filter spray assembly is provided outside the circulation box, the filter spray assembly including: a feed pipe fixedly connected to the outer circular wall of the circulation box, two fixing rings fixedly connected to the outer circular wall of the feed pipe, a filter disposed between the two fixing rings, screws threadedly connected to the opposite sides of the two fixing rings, and several screws threadedly connected to the filter; a booster pump fixedly connected to the end of the feed pipe away from the circulation box, a discharge pipe fixedly connected to the top of the booster pump, and several positioning rings fixedly connected to the end of the discharge pipe away from the booster pump, each positioning ring fixedly connected to the tower body, and several nozzles fixedly connected to the inner circular wall of the positioning rings; and an isolation air intake assembly provided on the outer circular wall of the tower body.

[0007] To reduce the load on the subsequent spray tower for treating waste gas and prevent clogging of the spray tower nozzles and circulation system, the waste gas treatment spray tower of this utility model preferably includes an isolation air intake assembly comprising: an air intake pipe fixedly connected to the outer circular wall of the tower body; a plurality of slots inside the air intake pipe; a spring block fixedly connected inside the slots; a filter disc inside the air intake pipe; a plurality of positioning slots on the outer circular wall of the filter disc; a telescopic spring fixedly connected inside the positioning slots; and a locking block fixedly connected to the top of the telescopic spring, the locking block being movably engaged with the spring block.

[0008] To facilitate the control of the pH value of the treatment liquid and improve the efficiency of subsequent spray tower treatment of waste gas, as a preferred embodiment of the waste gas treatment spray tower of this utility model, a fixing block is fixedly connected to the inner circular wall of the circulation tank, a pH sensor is fixedly connected to the top of the fixing block, a dosing tank is fixedly connected to the top of the support base, a PLC controller is fixedly connected to the outside of the dosing tank, a dosing pump is fixedly connected to the side of the dosing tank away from the PLC controller, the dosing pump is fixedly connected to the circulation tank, and the PLC controller is electrically connected to the dosing pump and the booster pump.

[0009] To prevent the liquid in the treated gas from being carried out of the tower and causing pollution, as a waste gas treatment spray tower of this utility model, preferably, a demister is fixedly connected inside the tower body, and an outlet pipe is fixedly connected to the top of the tower body.

[0010] To facilitate the discharge of liquid from the circulation tank and control the pH value within it, as a preferred embodiment of this waste gas treatment spray tower, the dosing tank is externally connected to a drain pipe, and a sealing cap is fixedly connected to the end of the drain pipe furthest from the circulation tank.

[0011] In order to ensure that the sprayed liquid can be evenly distributed on the surface of the packing material so that the liquid can fully contact the exhaust gas, as a waste gas treatment spray tower of this utility model, preferably, the nozzle is conical, and several of the nozzles are evenly distributed in a circumferential array on the inner wall of the positioning ring.

[0012] In summary, the present invention has the following main advantages:

[0013] 1. The lift pump, PLV controller, feed pipe, discharge pipe, filter, positioning ring and nozzle work together to pump the liquid in the circulation tank to the nozzle at the top of the tower after the lift pump receives the start signal. The nozzle atomizes the liquid into fine droplets and sprays them evenly on the surface of the packing layer. The filter installed on the circulation pipeline can intercept solid particles carried in the liquid, preventing the particles from entering the lift pump with the liquid and preventing them from causing wear, jamming or blockage to precision components such as impeller and seals, thus ensuring the long-term stable operation of the lift pump.

[0014] 2. By using the air inlet pipe and filter disc in conjunction, the filter disc at the exhaust gas inlet can block large-diameter dust and particles in the exhaust gas in advance, preventing these impurities from entering the tower body, reducing the processing load of the subsequent spraying system and packing layer, avoiding nozzle clogging, and ensuring the uniformity and continuity of the spraying effect.

[0015] 3. Through the coordinated operation of the PLC controller, pH sensor, circulation tank, dosing pump, and dosing tank, when the pH value of the liquid deviates from the preset range, the controller will immediately issue a command to start the dosing pump. The dosing pump will then accurately extract the neutralizing agent from the dosing tank and inject it into the circulation tank, automatically adjusting the pH value of the liquid back to the ideal range. This ensures that the absorbent is always kept in a highly active chemical reaction state, thereby maintaining a high efficiency in absorbing pollutants and avoiding a decrease in treatment efficiency due to manual detection and untimely dosing, thus saving operating costs. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the air outlet pipe structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the positioning ring structure of this utility model;

[0019] Figure 4 This is a utility model Figure 3 A magnified schematic diagram of the structure of part A in the diagram;

[0020] Figure 5 This is a schematic diagram of the intake pipe structure of this utility model;

[0021] Figure 6 This is a utility model Figure 5 A magnified schematic diagram of the partial structure of B in the diagram;

[0022] Figure 7 This is a schematic diagram of the sealing cap structure of this utility model.

[0023] Reference numerals in the attached diagram: 1. Support base; 2. Tower body; 3. Support plate; 4. Circulation tank; 5. Feed pipe; 6. Filter; 7. Fixing ring; 8. Screw; 9. Lifting pump; 10. Positioning ring; 11. Nozzle; 12. Air inlet pipe; 13. Slot; 14. Spring block; 15. Locking block; 16. Filter plate; 17. Positioning groove; 18. Telescopic spring; 19. Air outlet pipe; 20. Dosing tank; 21. Dosing pump; 22. Fixing block; 23. pH sensor; 24. Drain pipe; 25. PLC controller; 26. Discharge pipe; 27. Sealing cover; 28. Demister. Detailed Implementation

[0024] 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.

[0025] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4A waste gas treatment spray tower includes a support base 1, a circulation box 4 fixedly connected to the top of the support base 1, a tower body 2 fixedly connected to the top of the circulation box 4, a support plate 3 fixedly connected inside the tower body 2, and packing material movably fitted onto the top of the support plate 3 to ensure that the liquid sprayed from the subsequent nozzles 11 can fully contact the waste gas. A filter spray assembly is provided outside the circulation box 4, including a feed pipe 5 fixedly connected to the outer circular wall of the circulation box 4, two fixing rings 7 fixedly connected to the outer circular wall of the feed pipe 5, a filter 6 disposed between the two fixing rings 7, and threads on the sides of the two fixing rings 7 that are furthest from each other. A screw 8 is connected to the filter 6. A booster pump 9 is fixedly connected to the end of the feed pipe 5 away from the circulation box 4. A discharge pipe 26 is fixedly connected to the top of the booster pump 9. A number of positioning rings 10 are fixedly connected to the end of the discharge pipe 26 away from the booster pump 9. A number of positioning rings 10 are fixedly connected to the tower body 2. A number of nozzles 11 are fixedly connected to the inner circular wall of the positioning rings 10. A demister 28 is fixedly connected to the inside of the tower body 2. An air outlet pipe 19 is fixedly connected to the top of the tower body 2. The nozzles 11 are conical and a number of nozzles 11 are evenly distributed in a circular array on the inner circular wall of the positioning rings 10.

[0026] When the tower body 2 is used to treat exhaust gas, the operator first controls the PLC controller 25 to send a start signal to the booster pump 9. After receiving the signal, the booster pump 9 starts. Then, the liquid in the circulation tank 4 flows from the feed pipe 5 through the filter 6, and the booster pump 9 lifts the liquid to the discharge pipe 26. The liquid then flows into the positioning ring 10 and is sprayed out from the nozzle 11, forming countless tiny droplets that evenly cover the surface of the packing material, thus forming a huge liquid film area. The pollutants in the exhaust gas are then absorbed by the droplets sprayed from top to bottom. After the liquid has been sprayed and absorbed, it drips down under gravity and finally flows back to the circulation tank 4 at the bottom of the tower body 2. The filter 6 can filter the liquid passing through the feed pipe 5, reducing the particle content in the liquid in the feed pipe 5, preventing the particles in the feed pipe 5 from damaging the internal components of the booster pump 9, improving the treatment efficiency, and ensuring the stable effect of exhaust gas purification. At the same time, the circulation of the liquid greatly reduces water consumption and wastewater discharge.

[0027] refer to Figure 1 , Figure 2 , Figure 5 and Figure 6The outer circular wall of the tower body 2 is provided with an isolation air intake assembly, which includes: an air intake pipe 12, the air intake pipe 12 is fixedly connected to the outer circular wall of the tower body 2, the air intake pipe 12 has several slots 13 inside, the slots 13 are fixedly connected to spring blocks 14, the air intake pipe 12 is provided with a filter plate 16 inside, the outer circular wall of the filter plate 16 has several positioning slots 17, the positioning slots 17 are fixedly connected to a telescopic spring 18, the top of the telescopic spring 18 is fixedly connected to a locking block 15, and the locking block 15 is movably engaged with the spring block 14;

[0028] With the filter disc 16 in place, when the exhaust gas enters the tower body 2 from the inlet pipe 12, the filter disc 16 can block large-diameter particles before they enter the interior of the tower body 2. This can reduce the load on the subsequent spray tower and treatment facilities, prevent the nozzles 11 of the spray tower and the circulation system from becoming clogged, and significantly reduce equipment failures and maintenance needs caused by impurities, thus ensuring the continuous and efficient exhaust gas treatment process.

[0029] When the filter disc 16 needs to be cleaned regularly, the operator first pulls the filter disc 16, which moves away from the air inlet pipe 12. Then, the locking block 15 moves along the inner wall of the spring block 14 towards the filter disc 16, and the telescopic spring 18 is compressed. Subsequently, the air inlet pipe 12 is removed, making it convenient for the operator to clean. This effectively prevents the filter disc 16 from becoming clogged due to long-term dust accumulation, thereby maintaining its optimal pre-filtration efficiency.

[0030] refer to Figure 1 , Figure 2 and Figure 7 A fixing block 22 is fixedly connected to the inner circular wall of the circulation tank 4. A pH sensor 23 is fixedly connected to the top of the fixing block 22. A dosing tank 20 is fixedly connected to the top of the support base 1. A PLC controller 25 is fixedly connected to the outside of the dosing tank 20. A dosing pump 21 is fixedly connected to the side of the dosing tank 20 away from the PLC controller 25. The dosing pump 21 is fixedly connected to the circulation tank 4. The PLC controller 25 is electrically connected to the dosing pump 21 and the booster pump 9. A drain pipe 24 is fixedly connected to the outside of the dosing tank 20. A sealing cap 27 is fixedly connected to the end of the drain pipe 24 away from the circulation tank 4.

[0031] With the pH sensor 23 in place, when the tower 2 continuously treats the waste gas and the treated liquid enters the circulation tank 4, the operator controls the PLC controller 25 to send a start signal to the pH sensor 23. After receiving the signal, the pH sensor 23 monitors the pH value in the circulation tank 4 and transmits the monitoring data to the PLC controller 25. When the pH value is lower or higher than the set threshold, the PLC controller 25 sends a start signal to the dosing pump 21. After receiving the signal, the dosing pump 21 starts and draws liquid from the dosing tank 20 into the circulation tank 4. When the pH of the liquid in the circulation tank 4 falls within the set threshold range, the dosing tank 20 sends a stop signal to the dosing pump 21, and the dosing pump 21 stops starting. This achieves real-time monitoring of the pH value in the circulation tank 4. This automated closed-loop control ensures that the absorbent is always kept in a highly active chemical reaction state, thereby maintaining a high efficiency in absorbing pollutants and avoiding a decrease in treatment efficiency due to manual detection and untimely dosing, thus saving operating costs.

[0032] Working principle: Please refer to Figures 1-7 As shown, when the tower body 2 is used to treat exhaust gas, the operator first controls the PLC controller 25 to send a start signal to the lift pump 9 via the set lift pump 9. After receiving the signal, the lift pump 9 starts. Then, the liquid in the circulation tank 4 flows from the feed pipe 5 through the filter 6, and then the lift pump 9 lifts the liquid to the discharge pipe 26. Then the liquid flows into the positioning ring 10 and then sprays out from the nozzle 11, forming countless tiny droplets that evenly cover the surface of the packing, thus forming a huge liquid film area. Then, the pollutants in the exhaust gas are absorbed by the droplets sprayed from top to bottom. After the liquid has been sprayed and absorbed, it drips down under the action of gravity and finally flows back to the circulation tank 4 at the bottom of the tower body 2. The set filter 6 can filter the liquid passing through the feed pipe 5, reduce the content of particles in the liquid in the feed pipe 5, avoid the particles in the feed pipe 5 from damaging the internal components of the lift pump 9, improve the treatment efficiency, and ensure the stable effect of exhaust gas purification. At the same time, the circulation of liquid greatly reduces water consumption and wastewater discharge.

[0033] With the filter disc 16 installed, when the exhaust gas enters the tower body 2 from the inlet pipe 12, the filter disc 16 can block large-diameter particles before they enter the interior of the tower body 2, which can reduce the load on the subsequent spray tower and treatment facilities, prevent the nozzles 11 of the spray tower and the circulation system from being blocked, reduce equipment failures and maintenance needs caused by impurities, and ensure the continuous and efficient exhaust gas treatment process.

[0034] When the filter disc 16 needs to be cleaned regularly, the operator first pulls the filter disc 16, which moves away from the air inlet pipe 12. Then, the locking block 15 moves along the inner wall of the spring block 14 towards the filter disc 16, and the telescopic spring 18 is compressed. Subsequently, the air inlet pipe 12 is removed, making it convenient for the operator to clean. This effectively prevents the filter disc 16 from becoming clogged due to long-term dust accumulation, thereby maintaining its optimal pre-filtration efficiency.

[0035] With the pH sensor 23 in place, when the tower 2 continuously treats the waste gas and the treated liquid enters the circulation tank 4, the operator controls the PLC controller 25 to send a start signal to the pH sensor 23. After receiving the signal, the pH sensor 23 monitors the pH value in the circulation tank 4 and transmits the monitoring data to the PLC controller 25. When the pH value is lower or higher than the set threshold, the PLC controller 25 sends a start signal to the dosing pump 21. After receiving the signal, the dosing pump 21 starts and draws liquid from the dosing tank 20 into the circulation tank 4. When the pH of the liquid in the circulation tank 4 is within the set threshold range, the dosing tank 20 sends a stop signal to the dosing pump 21, and the dosing pump 21 stops starting. This achieves real-time monitoring of the pH value in the circulation tank 4. This automated closed-loop control ensures that the absorbent is always kept in a highly active chemical reaction state, thereby maintaining a high efficiency in absorbing pollutants (especially acidic or alkaline gases), avoiding the decrease in treatment efficiency caused by manual detection and untimely dosing, and saving operating costs.

[0036] 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waste gas treatment spray tower, characterized in that, include: A support base (1) is fixedly connected to a circulation box (4) at the top of the support base (1), and a tower body (2) is fixedly connected to the top of the circulation box (4). A support plate (3) is fixedly connected inside the tower body (2). The circulation box (4) is provided with a filter spray assembly. The filter spray assembly includes: a feed pipe (5), which is fixedly connected to the outer circular wall of the circulation box (4). Two fixing rings (7) are fixedly connected to the outer circular wall of the feed pipe (5). A filter (6) is provided between the two fixing rings (7). Screws (8) are threadedly connected to the side of the two fixing rings (7) that are far away from each other. Several screws (8) are threadedly connected to the filter (6). A lifting pump (9) is fixedly connected to the end of the feed pipe (5) that is far away from the circulation box (4). A discharge pipe (26) is fixedly connected to the top of the lifting pump (9). Several positioning rings (10) are fixedly connected to the end of the discharge pipe (26) that is far away from the lifting pump (9). Several positioning rings (10) are fixedly connected to the tower body (2). Several nozzles (11) are fixedly connected to the inner circular wall of the positioning rings (10). The outer circular wall of the tower body (2) is provided with an air intake isolation component.

2. The waste gas treatment spray tower according to claim 1, characterized in that, The isolation intake assembly includes: An air inlet pipe (12) is fixedly connected to the outer circular wall of the tower body (2). Several slots (13) are opened inside the air inlet pipe (12). A spring block (14) is fixedly connected inside the slot (13). A filter plate (16) is provided inside the air inlet pipe (12). Several positioning slots (17) are opened on the outer circular wall of the filter plate (16). A telescopic spring (18) is fixedly connected inside the positioning slot (17). A locking block (15) is fixedly connected to the top of the telescopic spring (18). The locking block (15) is movably engaged with the spring block (14).

3. The waste gas treatment spray tower according to claim 1, characterized in that: A fixing block (22) is fixedly connected to the inner circular wall of the circulation tank (4). A pH sensor (23) is fixedly connected to the top of the fixing block (22). A dosing tank (20) is fixedly connected to the top of the support base (1). A PLC controller (25) is fixedly connected to the outside of the dosing tank (20). A dosing pump (21) is fixedly connected to the side of the dosing tank (20) away from the PLC controller (25). The dosing pump (21) is fixedly connected to the circulation tank (4). The PLC controller (25) is electrically connected to the dosing pump (21) and the booster pump (9).

4. The waste gas treatment spray tower according to claim 1, characterized in that: A demister (28) is fixedly connected inside the tower body (2), and an air outlet pipe (19) is fixedly connected to the top of the tower body (2).

5. A waste gas treatment spray tower according to claim 3, characterized in that: The dosing tank (20) is fixedly connected to the outside of a drain pipe (24), and a sealing cap (27) is fixedly connected to the end of the drain pipe (24) away from the circulation tank (4).

6. The waste gas treatment spray tower according to claim 1, characterized in that: The nozzle (11) is conical, and several nozzles (11) are evenly distributed in a circumferential array on the inner wall of the positioning ring (10).

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