Different types and processes of paints used in spray booth or workshop, and different organic solvents used, lead to different composition and characteristics of paint mist exhaust gas. Some paint mist exhaust gas components are relatively small, and some paint mist exhaust gas components are very complex; Some paint mist exhaust gases have a high concentration of a single component, while some paint mist exhaust gases have little difference. This part of the paint mist needs to be collected and treated. At the same time, the main component of organic waste gas is waste gas containing triphenyl (benzene, toluene and xylene), which is colorless and highly irritating. It can diffuse into the atmosphere with the flow of air, breathe through human body or directly act on human body, causing harm to respiratory system, blood, heart, lung, liver, mucosa, eyes and nerves. It can also directly hurt people through the skin. If this waste gas is not treated, it will pollute the environment and affect the lives of people around.

The waste gas produced during painting is mainly paint mist particles and organic waste gas, that is, voc, which mainly comes from solvents in paint and organic components in auxiliary materials. The treatment of these two kinds of waste gases needs to be treated separately. Paint mist should be blocked by dry DPA paint mist filter or water filtration, and then VOC organic waste gas should be adsorbed or burned by waste gas purification treatment device.

For paint mist escaping from spray painting, a paint mist removal device is needed; The VOC treatment method of insoluble water generally adopts "activated carbon adsorption+photocatalytic oxidation desorption combined waste gas purification system, zeolite molecular sieve adsorption or absorption method" Paint mist control device of spray booth

The activated carbon adsorption device of the waste gas treatment device in the painting room adopts front-end multi-stage paint mist filtration. The first stage can use dry DPA paint mist filter cotton or DPA carton paint mist filter products, which can block paint particles with accuracy exceeding 10 micron, and the collection efficiency is as high as 99.8%. Then the second and third stages can use multi-band filters with higher filtration accuracy and high efficiency. Filter out the finer particles, then introduce them into the activated carbon adsorption area of waste gas purification equipment, adsorb them with honeycomb activated carbon, columnar activated carbon or granular activated carbon, and then discharge the adsorbed waste gas.

Activated carbon waste gas purification is a dry paint mist waste gas treatment equipment. Consists of a box body and an adsorption unit arranged in the box body. Different specifications can be combined according to the number and air volume of adsorption units. Activated carbon waste gas purifier can treat a variety of different waste gases by selecting different fillers, which is mainly used to purify organic waste gases such as paint. The relatively small activated carbon adsorption device is only a few thousand dollars. After the above filtration, the exhaust gas from the spray booth enters the following ultraviolet oxidation exhaust gas purification equipment after adsorption treatment. Using artificial ultraviolet wave as energy source and catalyst, a large number of high-energy ionic agent active groups can be produced. Paint, benzene, toluene, xylene, resin, butanone, aldehyde and additives react with active free groups and decompose into harmless gases carbon dioxide and water.

The spray booth needs to choose a suitable exhaust gas treatment device according to different spray environment and spray quantity, as well as the concentration of exhaust gas and the emission standards required by environmental protection. For areas with low emission concentration, it is necessary to install catalytic combustion equipment and use precious metal catalyst+honeycomb activated carbon for adsorption. After being heated and purified, the waste gas is discharged through the centrifugal fan at the tail.

Some spray booths with a large amount of spray paint need to use the above-mentioned spray paint exhaust gas purification device, and the purification efficiency can reach over 95%. You can also use the cyclone purification tower+steam filtration+photo-oxygen catalytic activated carbon integrated machine to treat the waste gas generated during painting, and it can also meet the waste gas emission standard under the condition of suitable design air volume.