Biological fine desulfurization treatment system for biogas

Abstract

A biological fine desulfurization treatment system for biogascomprises a desulfurization washing tower, a regeneration reactor, a sulfur precipitator, a refining washing tower and a refining washing liquid circulating tank; the exhaust pipeline of the desulfurization washing tower is communicated with the refining washing tower, the liquid inlet pipeline of the desulfurization washing tower is communicated with the regeneration reactor, and the rich liquid discharge pipeline of the desulfurization washing tower is communicated with the regeneration reactor; the sulfur discharge pipeline of the regeneration reactor is communicated with the sulfur precipitator, and a liquid discharge pipeline of the sulfur precipitator is communicated with the regeneration reactor; and the refining washing liquid circulating tank is respectively communicated with the refining washing tower and the regeneration reactor. The further purification effect is achieved while efficient and low-cost desulfurization is achieved, the failed washing liquid is treated by the halophilic desulfurization bacillus to participate in circulation, and the purification capacity of the washing liquid for further removing hydrogen sulfide is improved by using better physical and chemical conditions.

Description

technical field [0001] The invention relates to the technical field of biogas desulfurization, in particular to a biogas desulfurization treatment system. Background technique [0002] Biological desulfurization is a new environmental protection technology developed in recent years. It is a specific application of biotechnology in the field of environmental protection and renewable energy utilization. It has low cost, good desulfurization effect, no need to add expensive chemical catalysts and high temperature High pressure and other conditions, so it is now widely used in industry, agriculture, animal husbandry, urban kitchen waste treatment, and landfill treatment. [0003] At present, there are some problems in the biological desulfurization technology, which generates elemental sulfur, and its source of electron donation is provided by the oxygen in the air blown into the air, but it is unavoidable in the process of oxygen supply that it will lead to excessive oxidation ...

AI Technical Summary

Problems solved by technology

Sulfur-containing gas emissions are also subject to stricter index requirements than this. The existing biological desulfurization process is difficult to meet such requirements, so that other methods need to be added, such as using solid chemical desulfurization in series, etc.

However, the service life of solid chemical desulfurization is very short, and it will soon fail to meet the standard

This is because solid desulfurization has many disadvantages: a. The efficiency is not high, and it is very easy to be saturated; b. The cost of replacing the desulfurizer is high, the labor intensity is high, there is dust, the risk of spontaneous combustion and explosion during the replacement work, and the working environment is harsh

Images