Absorbent for removing VOC waste gas and preparation method thereof

Abstract

The invention discloses an absorbent for removing VOC waste gas and a preparation method thereof. The absorbent is prepared from, by mass, span 80 1.8%, Tween 80 7.2%, n-butyl alcohol 3%, glycerol 1%, biodiesel 20%, water 60.6%, hexahydro-1,3,5-tris(hydroxyethyl)-s-triazine 1.4%, 1% mass concentration of sophorolipid 1% and 3.9% mass concentration of rhamnolipid 4%. A preparation method comprises the steps that the span 80 and the Tween 80 are mixed and stirred evenly, the n-butyl alcohol, the glycerol, the biodiesel, the water, the rhamnolipid, the sophorolipid and the hexahydro-1,3,5-tris(hydroxyethyl)-s-triazine are sequentially added during stirring, and even stirring is performed to complete the preparation of the absorbent. The absorbent uses an organic solvent as a raw material, the rhamnolipid and the sophorolipid having stronger benzene series adsorption capacity are added, the absorption effect is enhanced, the biochemical properties of discharged waste gas absorption liquid are good, the absorbent can be directly used in an existing sewage treatment system for treatment, and a good treatment effect is obtained.

Description

technical field [0001] The invention relates to the technical field of waste gas treatment, in particular to an absorbent for removing VOC waste gas and a preparation method thereof. Background technique [0002] In recent years, the treatment of volatile organic compounds (volatile organic compounds, VOC) waste gas is mainly divided into two categories: [0003] One is non-recycling methods, such as thermal destruction, photocatalytic oxidation, plasma and biodegradation; the other is recovery methods, such as adsorption and absorption. [0004] Under the background of advocating low-carbon life and resource conservation, the absorption method can not only control environmental pollution, but also create economic added value, and achieve a development model of clean production and circular economy. Treasure, recycling, using absorption method to treat benzene series waste gas, the choice of absorption method is extremely critical. [0005] The absorption method is to ...

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Problems solved by technology

[0006] The absorption liquid can usually be divided into water-based absorption liquid composed of organic solvent, water-surfactant or water-organic solvent. Among them, 1) organic solvent: biodiesel is used as the organic waste gas absorption solvent, but relatively simple adsorption and saturated The time is short and cannot be recovered; 2) Water-surfactant: the absorption liquid prepared with Tween series surfactants and co-surfactants; or use sodium citrate as the absorbent, add citric acid, inorganic salt additives and poly Ethylene glycol and additives composed of the three, but the absorption capacity of sodium citrate to benzene series gas is very small, it is difficult to be applied in the middle of the actual treatment; 3) water-organic solvent-surfactant: biodiesel, water The emulsion prepared with surfactant is used as the absorption liquid, but the absorption effect of the water-organic solvent-surfactant type absorbent used to remove VOC waste gas on the market is not good, and the waste absorption liquid discharged has poor biochemical properties, which is easy to cause environmental damage. Pollution

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