Energy-saving environment-friendly circulation type waste gas treatment method applied to paint spraying and paint baking process

Abstract

The invention discloses an energy-saving environment-friendly circulation type waste gas treatment method applied to a paint spraying and paint baking process. The method comprises the steps of paintspraying stage waste gas treatment, levelling stage waste gas treatment and drying stage waste gas treatment; during the drying stage waste gas treatment, after the levelling is completed, the operation enters the drying stage; waste gas in a drying chamber is taken away by gas exchange equipment; the taken waste gas is filtered and dried; the treated waste gas flows back into the drying chamber to form circulation airflow; when the concentration of organic volatile gas is high, and is lower than the lower explosive limit by 25 percent, a small part of high-concentration waste gas is extractedfrom the circulation airflow; heating and low-temperature catalytic oxidation are performed to form high-temperature combustion waste gas; after the high-temperature combustion waste gas and most circulation airflow are subjected to heat exchange, freeze drying and adsorption are performed; the waste gas is exhausted into atmosphere after reaching the standard. After the method is used, the wastegas can be thoroughly treated as much as possible; the discharging total quantity is reduced to the greatest degree; the resource utilization rate is improved; the effects of energy saving and environment protection are really achieved.

Description

technical field [0001] The invention belongs to the technical field of painting and baking, and in particular relates to an energy-saving and environment-friendly circulating waste gas treatment method applied to the painting and baking process. Background technique [0002] The painting and baking process involves furniture, aviation, automobiles, ships, containers, hardware appliances, electronics industries, etc. The existing painting and baking process is generally completed in the paint booth, and a large amount of paint mist and organic volatile gases will be generated during the painting and baking process. exhaust gas. [0003] Existing treatment of exhaust gas in the paint room is generally to filter out the particulate matter in the exhaust gas, but there are still many harmful components that are directly discharged, and some even directly discharge the exhaust gas in the paint room without any treatment, which seriously affects the surrounding environment. livin...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an energy-saving and environment-friendly circulating waste gas treatment method applied to the paint spraying and baking process, and solve the problem of incomplete and incomplete treatment of waste gas in the existing paint spraying and baking process, which causes great environmental pollution and waste of resources. Achieve ultra-low concentration and ultra-low total emissions, the total emissions are only 10% or less of the qualified emissions of conventional environmental protection processes, and the heat energy that would have been discarded is recovered and recycled to achieve energy conservation and environmental protection

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