Hydrogen sulfide tail gas treatment system and method

Abstract

The invention relates to a hydrogen sulfide tail gas treatment system and a hydrogen sulfide tail gas treatment method. The hydrogen sulfide tail gas treatment system comprises an absorption tank, a settling tank, an electrolytic tank and a circulating pump, wherein an oxidant solution is filled into the absorption tank; a first overflow pipe is arranged on the upper part of the side wall of the absorption tank and is communicated with the settling tank; tail gas discharge pipes are arranged on the top of the absorption tank and the top of the settling tank respectively; a second overflow pipe is arranged on the upper part of the side wall of the settling tank and is communicated with the electrolytic tank; the inlet end of the circulating pump is communicated with the electrolytic tank by a first pipeline; and the outlet end of the circulating pump is communicated with the absorption tank by a second pipeline. According to the hydrogen sulfide tail gas treatment system, hydrogen sulfide is converted into a sulphur simple substance and hydrogen by oxidation reduction reaction, so that the hydrogen sulfide is utilized fully, reaction liquid is recycled, a treatment effect is stable, precious hydrogen resources can also be produced, and the hydrogen sulfide tail gas treatment system has the great economic significance on a large-scale treatment device; and the hydrogen sulfide in tail gas can be absorbed economically, efficiently, conveniently and stably.

Description

technical field [0001] The invention relates to the field of chemical tail gas treatment, in particular to a hydrogen sulfide tail gas treatment system and method. Background technique [0002] Existing hydrogen sulfide tail gas treatment equipment mainly adopts Claus furnace treatment (industrial scale) or alkali absorption treatment. Claus furnace treatment uses sulfur recovery catalyst at high temperature to obtain elemental sulfur, and hydrogen atoms are converted into water, which cannot comprehensively utilize valuable hydrogen resources and is suitable for larger industrial scales; alkali absorption treatment uses alkaline substances (hydrogen oxidation Sodium solution, ammonia water, etc.) to neutralize hydrogen sulfide (such as patent number: 200720123284.9, named: hydrogen sulfide tail gas treatment device), to produce alkali sulfide with low utilization value, and with the consumption of alkaline substances, the treatment effect is unstable. The above two types o...

AI Technical Summary

Problems solved by technology

Claus furnace treatment uses sulfur recovery catalyst at high temperature to obtain elemental sulfur, and hydrogen atoms are converted into water, which cannot comprehensively utilize valuable hydrogen resources and is suitable for larger industrial scales; alkali absorption treatment uses alkaline substances (hydrogen oxidation Sodium solution, ammonia water, etc.) to neutralize hydrogen sulfide (such as patent number: 200720123284.9, named: hydrogen sulfide tail gas treatment device), produce alkali sulfide with low utilization value, and with the consumption of alkaline substances, the treatment effect is unstable

The above two types of methods limit the promotion and application of hydrogen sulfide treatment and recovery facilities, and some enterprises can only use the method of tail gas incineration treatment, resulting in excessive sulfur dioxide emissions and air pollution

Images