Spray paint waste gas purification device and purification method therefor

Abstract

The invention discloses a spray paint waste gas purification device and a purification method therefor; the spray paint waste gas purification device comprises a body, a liquid supplementing box arranged outside the body, a circulating water pump and a draught fan, wherein the body is separated into an upper layer and a lower layer by a transverse clapboard, the upper layer and the lower layer are communicated at the left side, and a demister is arranged at the communicating part; the upper layer of the body is provided with a low temperature plasma reactor unit and an activated carbon adsorption unit, and the plasma unit is connected with a high voltage pulse power supply; the upper part of the lower layer inside the body is provided with a spray pipe network and a nozzle, wherein the circulating water pump is communicated with the spray pipe network and the liquid supplementing box; the lower layer is provided with a filler filter screen and polyhedral ball filler; the bottom of the lower layer is provided with a liquid storage box which is internally provided with alkali liquor; the purification method comprises: spray paint waste gas is purified by being sprayed with the alkali liquor and passing through the filler filter screen, water mist is removed by the demister, and then the obtained spray paint waste gas is purified by the low temperature plasma reactor and is finally purified by absorption of active carbon. Therefore, the device and the method has high purification efficiency, the discharged waste gas reaching national emission standard, low energy consumption and being safe and reliable.

Description

technical field [0001] The invention relates to a waste gas purification treatment device and method, in particular to a paint spraying waste gas purification device and a purification method. Background technique [0002] In the process of industrial production, especially in the painting process of industries such as machinery, electrical appliances, furniture, building materials (wooden doors, wooden floors, aluminum), home appliances, automobiles, motorcycles, bicycles and automobile maintenance, in most cases, the exhaust gas from spraying paint only passes through the After being treated by a water curtain machine, it is discharged immediately, particulate matter (paint mist), volatile organic compounds (VOC S ) and odor concentration all exceed the national emission standards, polluting the air and endangering people's health. The exhaust gas from spraying paint has a large air volume, and the paint mist is easy to block the equipment and other processing problems. ...

AI Technical Summary

Problems solved by technology

For example, the activated carbon adsorption method has the disadvantages of easy clogging, high resistance, and high regeneration costs. Because activated carbon is used for adsorption alone, activated carbon is easily blocked by viscous agents, pigments, and resins in the exhaust gas, and it is difficult to clean up after the blockage. adsorption

Although the water spray + activated carbon adsorption + catalytic combustion method solves the problems encountered by the activated carbon adsorption method, the water vapor generated by the water spray will occupy the surface area of ​​the micropores of the activated carbon, which reduces the adsorption efficiency. High consumption, unsafe, poor economic benefits, high cost, general manufacturers can not afford

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