The mobile spray booth usually uses the way of upper air blowing and lower air guiding, and the paint mist is discharged or directly discharged through the air duct after water spray filtration, activated carbon absorption, adsorption or combustion treatment. The filter layer is used to intercept paint mist and solid particles, and the filter material in the filter layer is mainly glass fiber cotton, slag, activated carbon, water spray and other materials. The filter layer can remove most of the paint mist and solid particles, and can also adsorb a small amount of organic pollutants, which can deal with 80% of the paint mist. So how to deal with the paint mist generated by the mobile spray booth? The following small series for you to introduce several methods, hope to be useful to you!
1、 Absorption refers to water spray washing, atomization washing, etc. Water spray has a good purification effect on paint mist and solid particles, which makes paint mist dissolve in water. As a common method of paint mist treatment, its principle is to achieve the separation of pollutants and clean gas by spraying water on the exhaust gas and settling water-soluble or large particles. No pump water curtain spray booth is to use this method for waste gas treatment. When workers spray paint on the surface of the workpiece facing the water curtain, the air containing paint mist enters the air-water channel through the water curtain after colliding with the water curtain, and strongly mixes with the water in the channel. When it enters the air collecting box, the flow rate suddenly decreases, the air and water are separated, and the air is pumped in by the fan after passing through the water baffle In the activated carbon adsorption device, the separated water flows into the overflow tank after gathering in the gas collecting tank, and the water overflows from the overflow tank to the flashing plate to form a water curtain, which flows back to the water tank. In this process, the paint mist forms a slag block, so as to adsorb and remove the paint particles.
2、 Generally, activated carbon, activated carbon fiber and coke powder are used for adsorption. The treatment effect of spraying waste gas with low concentration and low amount of waste gas is better, and it can absorb odor. In addition, after the adsorption of carbon is saturated, hot air or steam heating method is needed to desorb and regenerate the carbon. The saturated carbon without regeneration or nearly saturated carbon has little or poor adsorption effect. It has high purification rate and simple operation.
3、 Combustion methods include direct combustion and catalytic combustion. The direct combustion method is a method to remove organic waste gas by combustion. The operating temperature is 600 ~ 800 ℃, which is used for the treatment of organic waste gas with high concentration. The catalytic combustion method uses platinum, palladium, transition metal oxide and other catalysts to replace the flame. The operating temperature is above 200 ~ 400 ℃, which is used for the treatment of organic waste gas with high concentration and small flow rate.