Paint spraying is a widely used coating technology in the machining industry. The traditional painting process uses compressed air to blow and atomize the paint from the spray gun that is aligned with the workpiece to be coated, so that the surface of the workpiece is evenly coated by the paint. Paint raw materials - the coating consists of non-volatiles and volatiles, non-volatiles include film-forming substances and auxiliary film-forming substances, and volatiles refer to solvents and diluents (mainly xylene-based). The two-phase suspension formed by the coating and solvent atomization in the coating shop of the mechanical manufacturing shop escapes into the surrounding air and pollutes the air.

Shanghai Keying Environmental Protection Equipment Co., Ltd. uses a selective regenerative incinerator (rto) for the exhaust gas generated by mechanical processing and spraying. The organic waste gas of the mechanical plant reacts with oxygen at a certain temperature to generate CO2 and H2O, and emits a certain heat oxidation reaction process. The regenerative thermal oxidizer heats the mechanical processing spray gas to above 760 ° C to make the exhaust gas The VOC is oxidized and decomposed into CO2 and H2O, and the high-temperature gas generated by the oxidation flows through the ceramic regenerator to heat up the "heat storage", and is used to preheat the organic exhaust gas that is subsequently entered, thereby saving the treatment technology of the exhaust gas heating fuel consumption. The RTO's furnace structure ensures that the organic waste gas is thoroughly mixed in the incinerator and has a long enough residence time to ensure that the VOC oxidation reaction proceeds fully and completely.

The mechanical exhaust gas treatment equipment is characterized in that it can treat almost all organic compounds containing exhaust gas and can handle organic waste gas with high air volume and low concentration. It handles the flexibility of organic waste gas flow (nominal flow rate 20%~120%), and can adapt to changes and fluctuations in the composition and concentration of VOC in organic waste gas. The exhaust gas treatment device of the mechanical plant is not sensitive to the entrainment of a small amount of dust and solid particles in the exhaust gas. Its purification efficiency is high (three chambers >99%), the maintenance workload is small, the operation is safe and reliable, and the device has a long service life.