Waste gas treatment device

Abstract

The invention relates to a waste gas treatment device, which comprises a machine body, a waste gas inlet, a waste gas heating section, and a purified hot gas recycling and heating pipe, wherein the length direction of the waste gas heating section is provided with inner-hollow annular deflectors and circular deflectors; and the inner-hollow annular deflectors and the circular deflectors are arranged at intervals. The flowing distance of the waste gas in the heating section is lengthened by the deflectors to fully heat the waste gas and improve the temperature of an outlet. The device has the advantages of simple structure, convenient assembly and maintenance, and energy saving.

Description

1. Technical field [0001] The invention relates to an exhaust gas treatment device. 2. Background technology [0002] The patterns and pigments printed and painted on the metal sheet, the ink or paint should be dried with hot air to evaporate the organic solvent, so that the ink and paint can be attached to the metal sheet. [0003] At present, the metal sheet is transported to the drying room after printing or coating. When drying and curing, its volatile organic solvents account for about 65%, such as toluene, butanol, butyl acetate, cyclohexanone, etc. When the room is baked, benzene, toluene, xylene and other organic waste gas are discharged. The gas is sent to the waste gas treatment device by a high-pressure fan for preheating, heated to 250 ° C ~ 320 ° C, enters the catalytic chamber, and is contacted with a rare earth metal catalyst. Flameless catalytic combustion generates harmless and odorless carbon dioxide and water, and benzene, toluene, xylene, etc. are subjec...

AI Technical Summary

Problems solved by technology

[0003] At present, the metal sheet is transported to the drying room after printing or coating. When drying and curing, its volatile organic solvents account for about 65%, such as toluene, butanol, butyl acetate, cyclohexanone, etc. When the room is baked, benzene, toluene, xylene and other organic waste gas are discharged. The gas is sent to the waste gas treatment device by a high-pressure fan for preheating, heated to 250 ° C ~ 320 ° C, enters the catalytic chamber, and is contacted with a rare earth metal catalyst. Flameless catalytic combustion generates harmless and odorless carbon dioxide and water, and benzene, toluene, xylene, etc. are subjected to flameless catalytic combustion through catalysts. The temperature of the gas after the reaction is 350 ° C ~ 480 ° C, and its high temperature purifies hot air Back to the drying room, this structure preheats the exhaust gas treatment device to 250 ° C ~ 320 ° C, the temperature is raised by heating, its structure is complex, thermal efficiency is low, and the cost of use is high

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