Method for cleaning, recovering and treating painted lacquer exhaust organic gas and device

Abstract

The invention discloses a spraying paint organic exhaust gas purification recovery disposal method and a device. The method has the steps as follows: (1) the dust and paint mist of the spraying paint organic exhaust gas are removed by filtration, and high boiling point organic solvent component with the boiling point more than 110 DEG C is condensed; (2) a high boiling point solvent absorption recoverer is used for recovering the high boiling point organic solvent; (3) residual organic exhaust gas is sent into an adsorption tank, the organic solvent component in the exhaust gas is adsorbed, and the exhaust gas is exhausted after being adsorbed by the adsorption tank; (4) by adopting a vapour desorption method, the organic solvent adsorbed by the adsorption tank is desorbed; (5) the desorbed solvent steam and vapour are condensed as liquid; (6) the condensed mixed liquid is separated by the oil and water separator, the separated organic solvent can be used again, and the separated wastewater can be disposed separately. Therefore, precious resources can be recovered, secondary pollution can be reduced, the recovered solvent can be used again, and the consumption of energy source can be reduced.

Description

technical field [0001] The invention relates to a method and device for purifying, recovering and treating organic waste gas in the production process of spray paint (painting) in the manufacturing industry, and relates to a treatment for recovering organic waste gas produced by spray paint by adopting waste gas filtration, condensation, activated carbon adsorption and desorption technologies Methods and devices. This purification recovery treatment method and device can be suitable for recovery and treatment of benzene, toluene, xylene, trimethylbenzene, tetramethylbenzene, n-butanol, n-butyl ester, ethylene glycol monoethyl ether, methyl isobutyl ketone, isopropanol , ethylene glycol ether acetate, aromatic hydrocarbon solvents (such as SOLVESSO100#, 150#, 200# solvent oil), cyclohexane, gasoline... and other mixed or single organic solvent waste gases, so that these waste gases can be purified and treated At the same time, the organic waste gas that originally polluted the...

AI Technical Summary

Problems solved by technology

[0004] As for the organic waste gas produced by spray paint, due to the extremely mixed organic solvents used in the production process, some have a boiling point below 110°C, such as: benzene, toluene, n-butanol, cyclohexane, gasoline, etc., and also have a boiling point from 110°C to 290°C, such as xylene, trimethylbenzene, tetramethylbenzene, ethylene glycol monoethyl ether, ethylene glycol ether acetate, aromatic hydrocarbon solvents (such as SOLVESSO100#, 150#, 200# solvent oil), etc., and it is a variety of mixed Organic solvents with high boiling points, such as trimethylbenzene, tetramethylbenzene, ethylene glycol monoethyl ether, ethylene glycol ether acetate, aromatic hydrocarbon solvents (such as SOLVESSO100#, 150#, 200# solvent oil), etc., use traditional It is difficult to desorb after being adsorbed by the advanced activated carbon adsorption technology. At the same time, the exhaust gas of spray paint is mixed with a variety of organic solvents with different characteristics. Therefore, it is necessary to recycle the organic solvent while treating the exhaust gas. Although some people have tried this kind of recovery treatment before , but there are no successful cases

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