Waste gas treatment device for electrostatic spraying

Abstract

The utility model discloses a waste gas treatment device for electrostatic spraying, and belongs to the technical field of penetrant inspection. Comprising a waste gas treatment tower communicated to the middle of an electrostatic spraying chamber through an air pipe, a plurality of filler units and a plurality of spraying devices which are arranged in the waste gas treatment tower and are sequentially distributed at intervals from top to bottom, and a fan communicated with the top of the waste gas treatment tower. Waste gas generated during electrostatic spraying is connected to the outdoor independent waste gas treatment tower through the air pipe to be treated by adopting a spraying method, the sprayed treatment liquid is recycled for multiple times and then is discharged into a sewage treatment system, and the treated gas reaches the third-level standard of Integrated Emission Standard of Air Pollutants (GB16297-1996) and can be directly discharged outdoors.

Description

Technical Field

[0001] The utility model belongs to the technical field of penetration testing, in particular to an exhaust gas treatment device for electrostatic spraying. Background Art

[0002] Penetrant testing is a method that uses capillary phenomena to detect surface defects of materials and belongs to the category of non-destructive testing technology. When detecting defects in workpieces, fluorescent penetrant can be applied to the surface of the workpiece by electrostatic spraying, and adhere to the surface of the workpiece more evenly under electrostatic attraction, while also increasing the ability of the penetrant to penetrate into subtle defects. After that, the excess penetrant on the surface is removed, and then irradiated with ultraviolet light, and the cracks will show fluorescence.

[0003] During the electrostatic spraying process, some fluorescent penetrant will escape into the air to form waste gas. As the spraying time increases, the concentration of fluorescent penetrant in the air in the spray room accumulates, posing a threat to the health of operators. The current conventional practice is to use a fan to discharge these waste gases outside the spray room, but this simple discharge method is not equipped with a purification device, which means that pollutants are directly discharged into the atmosphere without effective treatment, and will still pollute the external environment. Utility Model Content

[0004] In order to overcome the above technical defects, the utility model provides an exhaust gas treatment device for electrostatic spraying to solve the problems involved in the background technology.

[0005] The utility model provides an exhaust gas treatment device for electrostatic spraying, comprising: an exhaust gas treatment tower connected to an electrostatic spraying room through an air duct to the central part thereof, a plurality of filler units and a plurality of spray devices arranged in the exhaust gas treatment tower and distributed alternately from top to bottom, and a fan connected to the top of the exhaust gas treatment tower.

[0006] Preferably or optionally, the packing unit is installed in the exhaust gas treatment tower in a detachable manner.

[0007] Preferably or optionally, a plurality of limiting rings suitable for installing the packing unit are arranged inside the exhaust gas treatment tower.

[0008] Preferably or optionally, the filler unit comprises: a shaped container which is conical or truncated cone-shaped and has a surface covered with hollow holes, and an adsorption filler placed and / or fixed in the shaped container.

[0009] Preferably or optionally, the inner diameter of the limiting ring gradually decreases from top to bottom;

[0010] The outer diameter of at least some areas of the filler unit is larger than the inner diameter of the same layer of limiting rings, and the outer diameter of less than all areas of the filler unit is smaller than the inner diameter of the previous layer of limiting rings.

[0011] Preferably or optionally, two adjacent packing units are connected together via a connecting piece.

[0012] Preferably or optionally, the spraying device comprises a plurality of nozzles evenly distributed at the bottom of the limiting ring.

[0013] Preferably or optionally, a water outlet is provided at the bottom of the exhaust gas treatment tower and is connected to the spraying device via a circulation pump.

[0014] Preferably or optionally, a filter assembly is provided at the water outlet.

[0015] Preferably or optionally, the air outlet end of the fan is connected to a high tower chimney.

[0016] The utility model relates to an exhaust gas treatment device for electrostatic spraying. Compared with the prior art, the utility model has the following beneficial effects: the exhaust gas generated during electrostatic spraying is connected to an independent outdoor exhaust gas treatment tower through an air duct for treatment using a water spraying method. The water after spraying is recycled for multiple times and then discharged into a sewage treatment system. The treated gas meets the third level standard of the "Comprehensive Emission Standard of Air Pollutants" (GB16297-1996) and can be directly discharged to the outdoors. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the waste gas treatment device in the utility model.

[0018] Figure 2 It is a structural schematic diagram of the waste gas treatment tower in the utility model.

[0019] The reference numerals in the drawings are: 100, air duct; 200, exhaust gas treatment tower; 300, packing unit; 400, spray device; 500, fan; 600, high tower chimney; 310, shaping container; 210, limiting ring; 320, connecting piece; 410, circulating pump; 420, filter assembly. DETAILED DESCRIPTION

[0020] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0021] See attached Figure 1, an exhaust gas treatment device for electrostatic spraying, comprising: an exhaust gas treatment tower 200 connected to the electrostatic spraying room through an air duct 100 to the central part thereof, a plurality of filler units 300 and a plurality of spray devices 400 arranged in the exhaust gas treatment tower 200 and distributed alternately from top to bottom, and a fan 500 connected to the top of the exhaust gas treatment tower 200.

[0022] Among them, the fan 500 forms a negative pressure in the exhaust gas treatment tower 200, guiding the electrostatic spraying room into the exhaust gas treatment tower 200. The packing unit 300 inside the exhaust gas treatment tower 200 can not only play a role in filtering and adsorption, but also prolong the time for the gas to pass through the exhaust gas treatment tower 200, ensuring that the spray liquid (the spray liquid can be tap water or alkali liquid) is fully in contact with the exhaust gas, and the harmful components in the exhaust gas are removed by physical absorption and chemical reaction. The treated gas meets the third level standard of the "Comprehensive Emission Standard of Air Pollutants" (GB16297-1996) and can be directly discharged to the outdoors. Moreover, the structure of the multi-layer packing unit 300 increases the chances of the exhaust gas contacting with the packing and the spray liquid. Each layer of the packing unit 300 can capture and remove a certain proportion of pollutants. The multi-layer cumulative effect significantly improves the purification efficiency and can remove harmful substances more thoroughly.

[0023] In a further embodiment, the packing unit 300 is detachably installed in the exhaust gas treatment tower 200, which facilitates maintenance and replacement of the packing unit 300 without complicated disassembly of the entire exhaust gas treatment tower 200, thereby greatly reducing maintenance time and cost.

[0024] See attached Figure 2 Specifically, a plurality of limiting rings 210 suitable for installing the packing unit 300 are arranged inside the waste gas treatment tower 200. The packing unit 300 includes: a shaped container 310 which is conical or truncated cone and has a surface covered with hollow holes, and an adsorbent filler placed and / or fixed in the shaped container 310. The inner diameter of the limiting ring 210 gradually decreases from top to bottom; the outer diameter of at least some areas of the packing unit 300 is larger than the inner diameter of the limiting ring 210 of the same layer, and the outer diameter of the packing unit 300 is smaller than the inner diameter of the limiting ring 210 of the previous layer in all areas. When installing the packing unit 300, it can be ensured that each layer of the packing unit 300 can fall into the corresponding limiting ring 210, and due to the conical and / or cylindrical structure, the overall stability of the packing unit 300 is enhanced, especially in the case of vibration or airflow impact that may be encountered during the treatment process.

[0025] In addition, two adjacent packing units 300 are connected together by a connecting piece 320. When disassembling the packing units 300, it is only necessary to open the top of the exhaust gas treatment tower 200 and pull the packing units 300 of the first layer upwards, which can drive the packing units 300 below to move upwards at the same time until all the packing units 300 are pulled out, thus simplifying the tediousness of traditional disassembly one by one, greatly shortening the maintenance time, reducing the labor intensity, and reducing the potential risk of damage to other components in the tower.

[0026] Correspondingly, the spray device 400 includes a plurality of nozzles 430 evenly distributed at the bottom of the limiting ring 210. On the one hand, it ensures that the spray liquid can fully and evenly cover the surface of the packing layer and the path through which the exhaust gas flows, and on the other hand, it avoids interference with the packing unit 300 during disassembly.

[0027] In a further embodiment, a water outlet is provided at the bottom of the waste gas treatment tower 200, and is connected to the spraying device 400 through a circulating pump 410, and a filter assembly 420 is provided at the water outlet. The filter assembly 420 is used to capture solid particles in the spray liquid, ensuring that the spray liquid returned to the circulation system is as clean as possible, reducing the risk of clogging the circulating pump 410 and the nozzle 430, and also improving the purification efficiency and water quality during re-spraying, ensuring the maximum utilization of resources, reducing the consumption of fresh water resources, and effectively controlling the amount of wastewater and pollutant emissions generated during the treatment process.

[0028] In a further embodiment, the air outlet end of the fan 500 is connected to a high tower chimney 600, and the high tower chimney is ≥15 meters from the ground to ensure that the discharged exhaust gas can be sufficiently diluted before reaching the ground to avoid adverse effects on the ground air quality.

[0029] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. An electrostatic spraying waste gas treatment device, characterized in that: include: An exhaust gas treatment tower (200) connected to the electrostatic spraying room through an air duct (100) in the middle thereof, a plurality of filler units (300) and a plurality of spray devices (400) arranged in the exhaust gas treatment tower (200) and distributed alternately from top to bottom, and a fan (500) connected to the top of the exhaust gas treatment tower (200); The filler unit (300) comprises: a shaped container (310) which is conical or truncated cone-shaped and has a surface covered with hollow holes, and an adsorption filler placed and / or fixed in the shaped container (310).

2. The exhaust gas treatment device for electrostatic spraying according to claim 1, characterized in that: The packing unit (300) is installed in the exhaust gas treatment tower (200) in a detachable manner.

3. The exhaust gas treatment device for electrostatic spraying according to claim 2, characterized in that: A plurality of limiting rings (210) suitable for installing the packing unit (300) are arranged inside the waste gas treatment tower (200).

4. The exhaust gas treatment device for electrostatic spraying according to claim 3 is characterized in that: The inner diameter of the limiting ring (210) gradually decreases from top to bottom; The outer diameter of at least some areas of the filler unit (300) is larger than the inner diameter of the same layer of limiting rings (210), and the outer diameter of all areas of the filler unit (300) is smaller than the inner diameter of the previous layer of limiting rings (210).

5. The exhaust gas treatment device for electrostatic spraying according to claim 2, characterized in that: Two adjacent packing units (300) are connected together via a connecting piece (320).

6. The exhaust gas treatment device for electrostatic spraying according to claim 3, characterized in that: The spray device (400) comprises a plurality of nozzles (430) evenly distributed at the bottom of the limiting ring (210).

7. The exhaust gas treatment device for electrostatic spraying according to claim 1, characterized in that: The bottom of the waste gas treatment tower (200) is provided with a water outlet, which is connected to the spraying device (400) via a circulation pump (410).

8. The electrostatic spraying waste gas treatment device according to claim 7, characterized in that: A filtering component (420) is provided at the water outlet.

9. The exhaust gas treatment device for electrostatic spraying according to claim 1, characterized in that: The air outlet end of the fan (500) is connected to a high tower chimney (600).

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