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A method and water curtain cabinet for treating spraying exhaust gas

A technology for waste gas and water curtain, applied in the method and water curtain cabinet, in the field of treatment of spraying waste gas, can solve the problems of the purification treatment system not running normally, affecting the effect of waste gas treatment, waterway and airway blockage, etc., so as to improve the effect of paint mist removal. , Conducive to mass transfer efficiency and the effect of reducing resistance

Active Publication Date: 2018-02-06
吴永光 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the paint mist sprayed with exhaust gas will adhere to the inside of the equipment, pipes and pump body. After a period of use, it will cause blockage of water and air channels, resulting in the failure of the purification treatment system to operate normally, affecting the effect of exhaust gas treatment, and affecting the water curtain. The cabinet causes damage, which affects its service life; the operation does not have the function of intelligent start and stop to save energy; on the other hand, the water curtain cabinets on the market need to be manually started and stopped frequently, which is inconvenient to use, and the water curtain cabinet is used for waste gas treatment The process cannot be automatically started and stopped according to the progress and end of the spraying process, which increases energy consumption

Method used

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  • A method and water curtain cabinet for treating spraying exhaust gas
  • A method and water curtain cabinet for treating spraying exhaust gas
  • A method and water curtain cabinet for treating spraying exhaust gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A method for treating spraying exhaust gas, comprising the steps of:

[0055] Exhaust gas is sucked in: suction device 2 sucks the spraying exhaust gas that spraying process produces into exhaust gas treatment chamber;

[0056] Water curtain absorption: the circulating water forms a water curtain on the water curtain baffle 13, and the water curtain showers and absorbs the spraying exhaust gas entering the exhaust gas treatment chamber, and the circulating water is added with paint mist decomposition agents and paint mist capture agents;

[0057] Swirling water washing: The paint mist in the spraying exhaust gas is brought into the circulating pool 12 by the water curtain, and part of the spraying exhaust gas enters the swirling device 14 to be washed by swirling water;

[0058] Demisting absorption: the sprayed gas-liquid mixture after being sprayed and absorbed is treated by the demisting layer 15;

[0059] Exhaust gas extraction: the spraying exhaust gas treated by ...

Embodiment 2

[0080] The difference between this embodiment and embodiment 1 is:

[0081] In this embodiment, the paint mist decomposition agent includes the following components in mass percentage:

[0082] Active foaming agent 15%

[0083] Sodium Hydroxide 2%

[0084] Citric acid 5%

[0085] water balance.

[0086] Further, the active foaming agent is dodecyl dimethyl hydroxypropyl phospholipid betaine.

[0087] Further, the paint mist trapping agent includes anionic polyacrylamide with a mass concentration of 10%. The molecular weight of the anionic polyacrylamide is 3 million.

[0088] Further, the paint mist trapping agent also includes lignin with a mass fraction of 10% and nano-alumina with a mass fraction of 20%, and the particle size of the nano-alumina is 30nm.

[0089] Further, the defogging layer 15 is provided with Pall ring fillers. Further, the defogging layer 15 includes two layers of defogging layers 15, which enhances the defogging effect.

[0090] Further, there a...

Embodiment 3

[0093] The difference between this embodiment and embodiment 1 is:

[0094] In this embodiment, the paint mist decomposition agent includes the following components in mass percentage:

[0095] Active foaming agent 25%

[0096] Sodium Hydroxide 4%

[0097] Citric acid 10%

[0098] water balance.

[0099] Further, the active foaming agent is fatty alcohol polyoxyethylene ether.

[0100] Further, the paint mist trapping agent includes anionic polyacrylamide with a mass concentration of 60%. The molecular weight of the anionic polyacrylamide is 10 million.

[0101] Further, the paint mist trapping agent also includes 30% lignin by mass fraction and 10% nano-alumina, and the particle size of the nano-alumina is 80nm.

[0102] Further, the demister layer 15 is provided with stepped ring packing. Further, the defogging layer 15 includes two layers of defogging layers 15, which enhances the defogging effect.

[0103] Further, there are two cyclone devices 14 . Using a plural...

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Abstract

The invention relates to the paint spraying coating technology field, and especially relates to a method for processing spray exhaust gas and a water curtain cabinet. The method comprises the following steps: exhaust gas suction, water curtain absorption, rotational flow washing, demisting absorption and exhaust gas pumping-out. A paint mist decomposition medicament and a paint mist trapping medicament are added circulating water. Starting and finishing of the water curtain absorption, rotational flow washing, exhaust gas suction and exhaust gas pumping-out steps are controlled through an infrared ray sensing device. The water curtain cabinet employs a water curtain baffle plate and a rotational flow device, paint mist removal effects of a spray cabinet is raised. The water curtain cabinet cooperates with addition of the paint mist decomposition medicament and the paint mist trapping medicament in circulating water, the situation can be prevented effectively that pain mist adheres to the inner walls of the rotational flow device and the water curtain cabinet, and the paint mist in the circulating water flocculates and floats, which facilitates cleaning of paint mist scum. Starting and finishing of the spray exhaust gas treatment operation can be controlled automatically through infrared ray sensing, usage is convenient and the energy saving effects are raised.

Description

technical field [0001] The invention relates to the technical field of painting and coating, in particular to a method for treating spraying waste gas and a water curtain cabinet. Background technique [0002] During the painting process, in order to ensure the air quality in the workshop, spraying exhaust gas collection devices are generally installed at the spraying points in the workshop. The purpose is to ensure the air quality in the workshop and to remove paint mist in advance for subsequent exhaust gas treatment to reduce subsequent treatment pressure. [0003] At present, two methods are generally used for paint mist pretreatment: wet water curtain cabinet and dry filter spray cabinet to collect exhaust gas. The dry-type spray cabinet adopts a high-density filter layer, and the paint mist is absorbed in the filter layer. When more paint mist accumulates on the surface of the filter layer, the air volume will decrease due to the decrease in the gap of the filter layer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D47/12
CPCB01D47/12B01D2247/10
Inventor 吴永光
Owner 吴永光
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