Method for cleaning, recovering and treating painted lacquer exhaust organic gas and device
A technology of organic waste gas and waste gas, which is applied in the direction of chemical instruments and methods, separation methods, steam condensation, etc., can solve problems such as failure, mixing, and difficult desorption, so as to reduce energy consumption, realize recycling, and protect the environment. Effect
Active Publication Date: 2009-12-16
蔡志煌
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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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[0031] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0032] Such as figure 2 Shown is the flow chart of the spray paint organic waste gas purification and recovery treatment method of the present invention, and the specific steps are as follows:
[0033](1) The organic waste gas from the painting production line is collected or comes out of the paint spraying room and paint drying room, and is filtered through filter 1 to remove most of the dust, paint mist and other harmful substances in the waste gas that are harmful to activated carbon. Then pass through the cooler 2 to condense some of the high-boiling organic solvent components in the organic waste gas, such as: xylene, trimethylbenzene, tetramethylbenzene, ethylene glycol monoethyl ether, ethylene glycol ether acetate, aromatic hydrocarbon solvents (such as SOLVESSO100# , 150#, 200# solvent oil) and other organic solvent components with a boiling point higher t...
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Abstract
The invention discloses a method and device for purifying and recovering organic waste gas from spray paint. The steps of the method are as follows: (1) the organic waste gas from spray paint is filtered to remove dust and paint mist, and the high boiling point organic solvent components with a boiling point greater than 110°C are condensed; (2) )Use the high boiling point solvent absorption recovery device to recover the high boiling point organic solvent; (3) The remaining organic waste gas is sent to the adsorption tank to absorb the organic solvent components in the waste gas, and the waste gas is discharged after being absorbed by the adsorption tank; (4) Using water vapor to remove (5) condense the desorbed solvent vapor and water vapor into a liquid; (6) separate the condensed mixed liquid with an oil-water separator, and the separated organic solvent It can be reused, and the separated waste water will be treated separately. In this way, precious resources can be recovered to reduce secondary pollution, and the recovered solvent can be reused to reduce energy consumption.
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...
Claims
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IPC IPC(8): B01D5/00B01D53/00B01D53/14B01D53/04
Inventor 蔡志煌
Owner 蔡志煌