Spray painting booth exhaust gas treatment solution

Paint mist and volatile organic solvents generated during spray painting, if directly released into the air without treatment, will cause significant harm to human health and the atmospheric environment. There are three main effective treatment methods:

1. Filtration combined with activated carbon adsorption;

2. Filtration combined with catalytic combustion;

3. Water spraying combined with activated carbon adsorption.

I. Filtration combined with activated carbon adsorption

The paint mist generated during spray painting is mainly composed of paint atomized by compressed air and suspended in the air. After initial filtration by a paint mist filter, larger paint droplets are removed. Then, the large surface area and residual energy of the porous activated carbon adsorb organic gas molecules onto its surface, thus purifying the waste gas.

II. Filtration combined with catalytic combustion

After pretreatment by the paint mist filter, the remaining paint mist and some organic waste gas are catalytically combusted at a temperature of 300℃~450℃ under the action of a catalyst. This completely oxidizes and decomposes the organic waste gas, thus purifying the waste gas. The heat generated during the oxidation and decomposition process also helps the equipment achieve thermal equilibrium, reducing energy consumption.

III. Water Spraying Combined with Activated Carbon Adsorption

When the paint volume is large or the paint mist concentration is too high, using activated carbon adsorption alone can cause a so-called "poisoning" phenomenon, meaning the activated carbon adsorption rate drops sharply.

Therefore, it is necessary to pre-treat the waste gas using a spraying method. After the paint mist is initially reduced in concentration through spraying, activated carbon adsorption is then used to achieve a better treatment effect.