Method and apparatus for managing hydrogen sulfide tail gas

Abstract

A process for treating the tail gas containing hydrogen sulfide includes such steps as introducing said tail gas to the solution of sodium hydroxide, reacting at 50-80 Deg C. until the sodium hydroxide and hydrogen sulfide become saturated solution of sodium thiohydride for recovering it, and condensing CS2 gas into liquid in condenser for recovering it. Its apparatus is composed of a stage-one reactor with tail gas inlet and outlet tubes, liquid draining valve and steam heating tube, a stage-two reactor with tail gas inlet and outlet tubes, liquid draining valve and water jetter, and a condenser between said two reactors.

Description

technical field [0001] The invention relates to the purification and treatment of industrial waste gas, in particular to a method and equipment for treating hydrogen sulfide tail gas. Background technique [0002] Viscose fiber produces a large amount of industrial waste gas containing carbon disulfide and hydrogen sulfide in the production process. Due to the low content of carbon disulfide and hydrogen sulfide, these waste gases are treated with high operating costs and poor effects by conventional treatment methods. At present, most of them are discharged at high altitudes, which is harmful to the environment produce some pollution. There are three existing methods for treating hydrogen sulfide tail gas. One is the catalyst desulfurization method, which is to contact the mixed exhaust gas with the catalyst liquid phase to make hydrogen sulfide into sulfur and eliminate it. However, due to the lack of catalyst sources, high price, and high operating costs, it is difficult...

AI Technical Summary

Problems solved by technology

However, due to the lack of catalyst sources, high price, and high operating costs, it is difficult to promote; the second is the combustion method, which has strict requirements on the concentration of each component in the exhaust gas, requiring the concentration of hydrogen sulfide and carbon disulfide to be above 5 g / m3 , the oxygen content should be lower than 6%, otherwise it will explode easily, the operation safety factor will be low, and some sulfur dioxide will still be discharged into the atmosphere to cause secondary pollution; the third is microbial biochemical treatment, because microbial strains are difficult to cultivate and easy to mutate, other Low hydrogen sulfide removal efficiency and high power costs

At present, these three methods are relatively difficult to implement, and they cannot effectively recover useful substances during the treatment process.

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