Electrophoretic coating exhaust gas treatment device

Abstract

The application relates to an electrophoretic coating waste gas treatment device, which comprises a washing tower, one side of the bottom of the washing tower is provided with an air inlet, the top end of the washing tower is provided with an air outlet pipe, a plurality of grid plates are arranged in the washing tower, a plurality of multi-surface hollow balls are filled in the interval between two adjacent grid plates, a spraying pipe is arranged above the multi-surface hollow balls, a circulating water pipe and a circulating water pump for connecting the bottom cavity of the washing tower with the spraying pipe are arranged on one side of the washing tower, and a demister is arranged on the topmost grid plate. The utility model belongs to the technical field of industrial waste gas treatment, adopts a composite structure of'multi-stage grid plate+multi-surface hollow ball filling+spraying', greatly increases the gas-liquid contact area and disturbance, and the removal efficiency of paint mist and soluble pollutants is much higher than that of a traditional spraying tower.

Description

Technical Field

[0001] This application relates to the field of industrial waste gas treatment technology, and in particular to an electrophoretic coating waste gas treatment device. Background Technology

[0002] During the electrophoretic coating process, the workpiece will release a mixture of waste gases containing paint mist, organic solvents, amines, and other substances. Direct emission of these gases can cause serious harm to the environment and human health. Currently, scrubbing towers are commonly used to treat these waste gases.

[0003] Traditional scrubbing towers typically employ simple spraying methods, resulting in short contact time and limited contact area between exhaust gas and scrubbing liquid. This leads to low removal efficiency for paint mist particles and soluble pollutants, especially for fine particulate matter and under conditions of significant load fluctuations. Furthermore, traditional devices suffer from poor demisting effects leading to water vapor carryover, inconvenient maintenance, and low water resource utilization. Therefore, developing a high-efficiency, stable, easy-to-maintain, and water-recycling-efficient electrophoretic coating exhaust gas treatment device is of great significance. Utility Model Content

[0004] Therefore, it is necessary to provide an electrophoretic coating waste gas treatment device, the specific technical solution of which is as follows.

[0005] An electrophoretic coating exhaust gas treatment device includes a scrubbing tower. An air inlet is provided on one side of the bottom of the scrubbing tower, and an air outlet is provided at the top of the scrubbing tower. Multiple grid plates are provided inside the scrubbing tower. A multi-faceted hollow sphere is filled in the partition between two adjacent grid plates. A spray pipe is provided above the multi-faceted hollow sphere. A circulating water pipe and a circulating water pump are provided on one side of the scrubbing tower, which connect the bottom cavity of the scrubbing tower to the spray pipe. A demister is provided on the topmost grid plate.

[0006] Furthermore, the side wall of the washing tower is provided with an inspection port above each grid plate.

[0007] Furthermore, the bottom of the outer wall of the washing tower is provided with a circulating water tank that communicates with the inner cavity of the washing tower, and a water supply pipe is provided on one side of the circulating water tank, which is connected to the circulating water tank.

[0008] Furthermore, a sampling and detection port is provided on one side of the air outlet pipe at the top of the washing tower.

[0009] Furthermore, a drain pipe is provided at the bottom of the washing tower.

[0010] Furthermore, the spray pipe is an annular pipe fixed to the bottom end of the grid plate, and the bottom of the annular pipe is provided with multiple spray nozzles.

[0011] Furthermore, the spray nozzle is a rotating nozzle.

[0012] Compared with existing technologies, this utility model has the following beneficial effects: (1) The electrophoretic coating exhaust gas treatment device of this utility model adopts a composite structure of "multi-level grid plate + multi-faceted hollow ball packing + spray", which greatly increases the gas-liquid contact area and disturbance, and the removal efficiency of paint mist and soluble pollutants is much higher than that of traditional spray towers. (2) The electrophoretic coating exhaust gas treatment device of this utility model has an external circulating water tank and a reasonable internal structure design, which makes the system water quality and water quantity stable, strong resistance to load fluctuations, and able to operate continuously and stably for a long time. (3) The electrophoretic coating exhaust gas treatment device of this utility model is set at the inspection port of each layer, which makes the replacement, cleaning and maintenance of the internal filler and the spray system very convenient, greatly reducing the maintenance difficulty and cost. (4) The electrophoretic coating exhaust gas treatment device of this utility model integrates functions such as defogging, sampling and sewage discharge, forming a complete exhaust gas treatment solution. The exhaust gas is clean and easy to monitor and manage. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a half-sectional view of the structure of the electrophoretic coating exhaust gas treatment device of this utility model; Figure 2 This is a schematic diagram of the internal structure of the electrophoretic coating exhaust gas treatment device of this utility model; Figure 3 This is a top view of the structure of the electrophoretic coating exhaust gas treatment device of this utility model.

[0015] Explanation of reference numerals in the attached figures: 1. Scrubber; 2. Air inlet; 3. Air outlet; 4. Grille; 5. Multi-faceted hollow sphere; 6. Spray pipe; 7. Circulating water pipe; 8. Circulating water pump; 9. Demister; 10. Inspection port; 11. Circulating water tank; 12. Water supply pipe; 13. Sampling and testing port; 14. Sewage pipe; 15. Spray nozzle. Detailed Implementation

[0016] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0017] The embodiments of this utility model will be described below based on its overall structure.

[0018] Reference Figures 1-3 As shown, this embodiment provides an electrophoretic coating exhaust gas treatment device, including a scrubbing tower 1. An air inlet 2 is provided on one side of the bottom of the scrubbing tower 1, and an air outlet 3 is provided at the top of the scrubbing tower 1. Multiple grid plates 4 are provided inside the scrubbing tower 1. Multifaceted hollow spheres 5 are filled in the partition between two adjacent grid plates 4. A spray pipe 6 is provided above the multifaceted hollow spheres 5. A circulating water pipe 7 and a circulating water pump 8 are provided on one side of the scrubbing tower 1, which connect the bottom inner cavity of the scrubbing tower 1 to the spray pipe 6. A demister 9 is provided on the topmost grid plate 4.

[0019] The electrophoretic coating exhaust gas treatment device of the present invention has a composite structural unit of "grating plate (4) + multi-faceted hollow spheres (5) + spray pipe (6)" set inside the scrubbing tower (1), and together with the circulating water system and the top demister (9), it forms a high-efficiency, multi-stage exhaust gas treatment system; the exhaust gas enters the bottom of the tower from the air inlet (2), and in the process of airflow rising, it passes through multiple packing layers filled with multi-faceted hollow spheres (5) in sequence. The circulating water pump (8) pumps the scrubbing liquid at the bottom of the tower to each layer of spray pipes (6) through the circulating water pipe (7) and sprays it downward. The exhaust gas and the scrubbing liquid have full and intense counter-current contact in the hollow sphere packing layer, and the pollutants are captured, dissolved or chemically reacted by the droplets. The purified gas continues to rise, passes through a demister (9) to remove the water mist it carries, and finally is discharged through the outlet pipe (3) in compliance with standards. This design solves the problems of insufficient gas-liquid contact and low processing efficiency in traditional scrubbing towers. Through a multi-stage packing layer design, the contact area and contact time between the gas and liquid phases are greatly increased, significantly improving the paint mist removal rate and pollutant purification efficiency. The demister effectively prevents water vapor from escaping, ensuring the cleanliness of the emitted gas.

[0020] Specifically, an inspection port 10 is provided on the side wall of the washing tower 1 above each grid plate 4. The inspection port (10) provided on the side wall of the washing tower (1) above each grid plate (4) provides a space passage for personnel to enter or operate; solves the problem of difficult maintenance and replacement of the packing and spray system in the tower; greatly facilitates the cleaning or replacement of the internal multi-faceted hollow spheres (5) and the maintenance of the spray pipes (6), reduces maintenance costs and downtime, and ensures the long-term stable operation of the device.

[0021] Specifically, the bottom of the outer wall of the washing tower 1 is provided with a circulating water tank 11 that communicates with the inner cavity of the washing tower 1. A water supply pipe 12 is provided on one side of the circulating water tank 11, and the circulating water pipe 7 is connected to the circulating water tank 11. The circulating water tank (11) serves as a storage, sedimentation and buffer unit for the washing liquid, and the water supply pipe (12) is used to replenish the water lost due to evaporation, sewage discharge and other reasons. The water circulation system is optimized, the water resource utilization rate is improved, and the stability of the system operation is enhanced. The external water tank facilitates the sedimentation of sludge and prevents the sewage outlet at the bottom of the tower from being blocked. The system water capacity is expanded, making the water quality and quantity more stable. The independent water supply pipe facilitates automatic control of the liquid level and realizes continuous operation.

[0022] Specifically, a sampling and detection port 13 is provided on one side of the air outlet pipe 3 at the top of the scrubbing tower 1, which is used to connect to detection equipment such as flue gas analyzers to realize real-time monitoring of the final emission gas, ensure that the emission meets the standards, facilitate environmental supervision and equipment operation status assessment, and make management more scientific and standardized.

[0023] Specifically, the bottom of the washing tower 1 is equipped with a drain pipe 14, which is used to periodically remove the sludge and waste liquid deposited at the bottom of the tower, maintain the cleanliness of the system, prevent blockage and secondary pollution, ensure the quality of the washing liquid and the smooth flow of the circulation system, and extend the service life of the device.

[0024] Specifically, the spray pipe 6 is an annular pipe fixed to the bottom end of the grid plate 4. The bottom of the annular pipe is provided with multiple spray nozzles 15. The annular arrangement and multiple nozzles realize uniform and full-coverage spraying of the packing layer below, solving the problem of local dry areas in the packing layer and reduced treatment efficiency caused by uneven spraying; it enables the washing liquid to evenly wet the entire cross section of the packing layer, ensuring full contact between the waste gas and the liquid, eliminating treatment dead corners, and maximizing the purification efficiency.

[0025] Specifically, the spray nozzle 15 is a rotating nozzle that uses hydrodynamics to rotate itself and perform 360° three-dimensional spraying. On the basis of uniform liquid distribution, it further increases the coverage of droplets and the dynamic stirring effect. The spray coverage area is larger and the droplets are smaller, which can not only wet the packing more evenly, but also play a certain self-cleaning role on the surface of the packing and prevent clogging.

[0026] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0027] The above embodiments only illustrate one or more implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An electrophoretic coating exhaust gas treatment device, comprising a scrubbing tower (1), wherein an air inlet (2) is provided on one side of the bottom of the scrubbing tower (1), and an air outlet pipe (3) is provided at the top of the scrubbing tower (1), characterized in that, The washing tower (1) is provided with multiple grid plates (4), and a multi-faceted hollow sphere (5) is filled in the partition between two adjacent grid plates (4). A spray pipe (6) is provided above the multi-faceted hollow sphere (5). A circulating water pipe (7) and a circulating water pump (8) are provided on one side of the washing tower (1) to connect the bottom cavity of the tower to the spray pipe (6). A demister (9) is provided on the topmost grid plate (4).

2. The electrophoretic coating waste gas treatment device according to claim 1, characterized in that, The washing tower (1) has an inspection port (10) located above each grid plate (4) on its side wall.

3. The electrophoretic coating waste gas treatment device according to claim 1, characterized in that, The bottom of the outer wall of the washing tower (1) is provided with a circulating water tank (11) that communicates with the inner cavity of the washing tower (1). A water supply pipe (12) is provided on one side of the circulating water tank (11), and the circulating water pipe (7) is connected to the circulating water tank (11).

4. The electrophoretic coating exhaust gas treatment device according to claim 1, characterized in that, The top of the washing tower (1) has a sampling and detection port (13) on one side of the air outlet pipe (3).

5. The electrophoretic coating waste gas treatment device according to claim 1, characterized in that, The bottom of the washing tower (1) is provided with a drain pipe (14).

6. The electrophoretic coating exhaust gas treatment device according to claim 1, characterized in that, The spray pipe (6) is an annular pipe fixed at the bottom of the grid plate (4), and the bottom of the annular pipe is provided with multiple spray nozzles (15).

7. The electrophoretic coating waste gas treatment device according to claim 6, characterized in that, The spray nozzle (15) is a rotating nozzle.

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