The invention discloses a method for enriching carbon disulfide and hydrogen sulfide in viscose fiber waste gas. The method comprises a step A of collecting the viscose fiber waste gas, and using absorption liquid composed of alkali liquor and alkali cellulose; a step B of adding acid wastewater into solution after spraying reaction, and performing degassing after reaction; a step C of cooling and dewatering the degassed waste gas, and obtaining waste gas with the carbon disulfide concentration content larger than or equal to 25%, the hydrogen sulfide concentration content larger than or equal to 23% and the moisture content equal to or smaller than 0.5%. Through matched processing of absorption liquid spraying and acid-containing wastewater, carbon disulfide and hydrogen sulfide in viscose production waste gas are enriched; by applying the obtained high-concentration waste gas to a follow-up separation method, the recycling rate of carbon disulfide can be improved, the treatment of the viscose fiber waste gas is facilitated, and environmental protection pressure is reduced.

Method for enriching carbon disulfide and hydrogen sulfide in viscose fiber waste gas

The invention relates to a system and a method for advanced treatment of low-concentration CS2 by a heterogeneous catalytic oxidation technology. The system comprises an induced draft fan and at leastone multiphase catalytic oxidation tower, and each multiphase catalytic oxidation tower corresponds to one fan; the induced draft fan is connected with the bottom end of the side surface of the multiphase catalytic oxidation tower through a gas inlet pipeline, a waste gas outlet is formed in the top end of the multiphase catalytic oxidation tower, and the waste gas outlet is connected with the bottom end of the side surface of the next multiphase catalytic oxidation tower through a pipeline; two filler supports are arranged in the multiphase catalytic oxidation tower; the low-concentration waste gas is sent to a first-stage multiphase catalytic oxidation tower through an induced draft fan to complete pre-oxidation of CS2 and then sent to a second-stage multiphase catalytic oxidation tower, residual CS2 is removed through multiphase oxidation, and up-to-standard emission is achieved; after the spraying liquid circulating liquid is saturated, a sulfate byproduct is prepared through evaporative crystallization. The method has the advantages of low operation cost, no wastewater discharge, no secondary pollution and the like; pollutants are converted into by-products, so that the treatment problem of the low-concentration CS2 waste gas is fundamentally solved.

System and method for advanced treatment of low-concentration CS2 by heterogeneous catalytic oxidation technology

The invention discloses a treatment method for waste gas in the production process of sponge titanium, and relates to the technical field of sponge titanium smelting. The method includes the steps of (1) connecting a dismountable pipeline with a waste gas pipe of a reactor; (2) connecting a process pipeline with the dismountable pipeline; (3) connecting a secondary washing system with the process pipeline; (4) connecting a blower with the secondary washing system. The method can achieve the effect of treating 70 km3/ h of the maximum waste gas displacement in a short time; on the basis of meeting the requirements of environmental protection, low concentration hydrochloric acid can be recovered, and the cost is reduced.

Treatment method for waste gas in production process of sponge titanium

The present invention relates to a viscose fiber production process exhaust gas treatment method, and belongs to the technical field of textile industry exhaust gas treatment. Viscose fiber production process exhaust gas is washed with a first-stage alkali spray tower, then enters a low-temperature plasma apparatus for treatment, then enters a catalytic oxidation treatment bed for exhaust gas catalytic oxidation treatment, and finally is introduced by a glass fiber reinforced plastic centrifugal fan into a second-stage alkali spray tower for absorption of residual small molecules in the exhaust gas. Through the above process, carbon disulfide and hydrogen sulfide exhaust gases can be decomposed into CO2, H2O, N2 and other harmless substances, and are discharged up to standards.

Viscose fiber production process exhaust gas treatment method

The utility model relates to a treatment system of waste gas in viscose fiber production process belongs to textile industry waste gas pollution control and treatment technical field. Treatment system of waste gas in viscose fiber production process include one -level alkali spray column, one -level alkali spray column passes through path connection to low temperature plasma device, the low temperature plasma device passes through path connection to catalytic oxidation processing bed, catalytic oxidation handles the bed through path connection to second grade alkali spray column. Through the processing procedure of above -mentioned system, can resolve into innoxious materials such as CO2, H2O, N2 with carbon disulfide and hydrogen sulfide waste gas, discharge to reach standard carries out.

Zhang Renyou

Papers

Viscose fiber production process exhaust gas treatment method

Treatment system of waste gas in viscose fiber production process