Method and device for removing high concentration hydrogen sulfide gas

Abstract

The invention relates to a method and device for removing high concentration hydrogen sulfide gas, and provides a method for removing high concentration hydrogen sulfide gas. The method comprises the following steps: simultaneously introducing high concentration hydrogen sulfide gas and a strong alkaline adsorption solution into a one-stage or multi-stage swirl injection adsorber; then delivering the adsorption solution that absorbs hydrogen sulfide in the one-stage or multi-stage swirl injection adsorber to a circulation liquid groove, heating the adsorption solution by a coil pipe of the circulation liquid groove, then pumping the adsorption solution into a desorption reactor by a solution circulation pump; in the desorption reactor, oxidizing the adsorption solution in the presence of a metal ion catalyst to carry out desorption so as to separate simple substance sulfur, recovering the separated sulfur; and delivering the effluent generated in desorption reactions into an adsorption solution regenerator, wherein in the regenerator, polyphenol carries out reactions with oxygen in the air to generate quinone, quinone oxidizes reduced metal ion catalysts in the regenerator to recover the catalysts, the oxidation and desulfurization performance of catalysts is recovered, and the adsorption-desulfurization-regeneration circulation is accomplished. The invention also provided a device for removing high concentration hydrogen sulfide gas.

Description

technical field [0001] The invention belongs to the field of petrochemical industry and environmental protection, relates to a method for removing high-concentration hydrogen sulfide gas, and is suitable for the recovery process of high-concentration hydrogen sulfide gas. Specifically, the invention provides a method and device for removing high-concentration hydrogen sulfide gas. Background technique [0002] h 2 S is a colorless irritating gas with a strong smell of rotten eggs, a polar molecule with a relative molecular mass of 34.08, an olfactory threshold of about 0.00041ppm, a relative density of 1.19 (air density is 1), and a melting point of -85.5°C , with a boiling point of -60.4°C, easily soluble in water and ethanol. [0003] Hydrogen sulfide exists in petrochemical, papermaking, textile and other production processes, which is very harmful and can cause corrosion of equipment and cause great harm to the environment and human health. In industrial production,...

AI Technical Summary

Problems solved by technology

The physical absorption method in wet desulfurization uses the absorption liquid to dissolve hydrogen sulfide, but it is difficult to completely remove it, and the tail gas still contains hydrogen sulfide

Although the conventional chemical absorption method has a fast removal rate and a high absorption rate, it is very easy to corrode the equipment; in the dry desulfurization process, the activated carbon pores of the physical adsorption method are easily blocked, and the adsorbent needs to be replaced regularly

There is a certain market for the production of elemental sulfur by the Claus process, but the operation of the Claus process is not stable when the hydrogen sulfide content is lower than 60%, and the process is relatively complicated, with many online instruments, a large number of equipment, and difficult operation. It occupies a large space and requires high process investment, so it is not suitable for small-scale gas treatment devices; the LO-CAT process method is technically reliable, and the sulfur recovery rate reaches 99%, but the main patented technology needs to be introduced, which requires a large space and high investment in equipment ; The ADA process has good selectivity to hydrogen sulfide, and the sulfur content of the purified gas can be lower than 1×10 -6 , but the oxidation speed of the process solution is too slow after absorbing hydrogen sulfide, and there are many by-products

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