Apparatus for recovering and purifying volatile organic compound from waste gas and application thereof

Abstract

The present invention relates to apparatus for recovering and purifying volatile organic compound from waste gas and its application. The apparatus has one first cooler, one grain filter and one polymer filter connected successively, one second cooler and one adsorber assembly connected through one three-way valve and one thermometer to the outlet of the polymer filter, one second condensing cooler, one fourth cooler and one first gas-liquid separator connected successively to the outlet of the adsorber assembly, and one separating tank connected to the first gas-liquid separator, one water soluble solution storing tank and one water insoluble solution storing tank. The present invention may be used for printing machine, dyeing and printing machine and reactor to prevent air pollution and recover solvent.

Description

Technical field [0001] The invention relates to a device for recovering and purifying exhaust gas containing volatile organic compounds and its application, in particular to a device for recovering and purifying exhaust gas containing volatile organic compounds discharged from printing presses, printing and dyeing machines and reaction kettles and Its application. Background technique [0002] Currently, printing inks contain volatile organic solvents used to dissolve resins and as mobile phases, such as ethanol, ethyl acetate, ethanol diethyl ether, butyl acetate, cyclohexane, cyclohexanone, toluene, and xylene. , Acetone, methyl ethyl ketone and mineral oil, kerosene, gasoline, money printing oil and so on. In the printing workshop of the printing factory, the newly printed paper undergoes a drying process to dry the ink printed on the paper into a film. Therefore, a large amount of volatile organic solvents are all volatilized as the temperature rises, and are mixed with air, ...

AI Technical Summary

Problems solved by technology

In the printing and dyeing workshop of the printing and dyeing factory, the fabrics that have just been printed and dyed have to go through the drying process to make the colors printed and dyed on the fabrics dry and finalized. Therefore, a large amount of volatile organic solvents evaporate with the increase of temperature and mix with the air. Then it is emptied, which not only causes serious pollution to the air, but also brings serious damage to people's health, and these organic solvents cannot be repeated. Printing and dyeing enterprises have to invest a lot of money to purchase these organic solvents, so it brings a lot of damage to the enterprise. A heavy economic burden has come, seriously affecting the economic benefits of the enterprise

[0004] In the reactors of the chemical industry and the pharmaceutical industry (such as extraction reactors, rectification reactors, etc.), volatile organic solvents are also emitted, and these solvents are directly emptied, which not only causes serious pollution to the air, but also causes people to The health of the company has brought serious damage, and these organic solvents cannot be repeated. Chemical and pharmaceutical companies have to invest a lot of money to buy these organic solvents, which has brought a heavy economic burden to the company and seriously affected the economy of the company. benefit

[0005] Chinese Patent No. ZL01109295.5 discloses a waste gas recovery device and device, which discloses that volatile organic gases are absorbed by water, and then frozen and separated. Although the recovery cost of this device is relatively low, it is well known that many organic solvents are insoluble in Water, or slightly soluble in water, so the device is only limited to the absorption of volatile organic gases that are easily soluble in water.

[0006] Chinese Patent No. ZL02805902.6 discloses the recovery of volatile organic compounds by carbon adsorption bed, which discloses the device that passes the volatile organic compounds through the activated carbon adsorber to recover the volatile organic compounds. And the organic compounds volatilized from the dyeing machine, because the organic compounds volatilized from the printing machine and the dyeing machine contain a lot of fibers and polymers such as: resin, these volatile organic compounds directly enter the activated carbon adsorber, which will cause activated carbon The irreversible damage of the adsorber, and the temperature of the organic compounds volatilized from the printing machine, dyeing machine and reaction kettle is usually high, and these volatile organic compounds directly enter the activated carbon adsorber, which will lead to reduced activity of activated carbon and shortened life

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