A recovery device for carbon disulfide in viscose fiber production

Abstract

The invention relates to the exhaust gas recovery field in the viscose fiber industry, and provides a device for recovery of carbon disulfide in viscose fiber production. The device is characterized in that: it comprises an alkali spray tower, an absorption tower, a heat exchanger, a desorption tower, a condenser and a gas-liquid separator. The spray tower is connected to the absorption tower, the absorption tower is in connection with the heat exchanger, the heat exchanger is connected to the desorption tower, the desorption tower is connected to the condenser, which is in connection with the gas-liquid separator. The device provided in the invention has the characteristics of simple structure, high absorption rate, low investment and operation cost, and suitability for industrialized application.

Description

technical field [0001] The invention relates to the field of waste gas recovery in the viscose fiber industry, in particular to a recovery device for carbon disulfide in viscose fiber production. Background technique [0002] The production of viscose fiber generally adopts alkaline yellowing glue making and acid coagulation forming process. Therefore, the waste gas generated in the production process of viscose fiber contains a large amount of H 2 S and CS 2 . CS in the exhaust 2 It mainly comes from the yellowing, coagulation forming and plasticizing stretching process of viscose fiber, and is produced by the by-product of the yellowing reaction of alkali cellulose. The main reaction formula is: [0003] Na 2 CS 3 +H 2 SO 4 →Na 2 S+CS 2 ↑+H 2 S↑ [0004] C 6 h 7 o 2 (OH) 3-X (OCSSH) X +H + →C 6 h 10 o 5 +XCS 2 ↑ [0005] Carbon disulfide is a colorless liquid at room temperature, volatile, extremely flammable and irritating. The existence of carbon di...

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Problems solved by technology

[0005] Carbon disulfide is a colorless liquid at room temperature, volatile, extremely flammable and irritating. The existence of carbon disulfide not only pollutes the environment, but also brings serious safety hazards to production. Therefore, carbon disulfide waste gas must be treated.

The device in this patent uses activated carbon adsorption to remove carbon disulfide, which is not suitable for solvent adsorption. The operating cost and investment cost of activated carbon adsorption are relatively high, and the mass and heat transfer between gas and solid is lower than that between gas and liquid. , the absorption rate is slow, and the absorption effect is not as good as solvent adsorption

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