In view of the depletion crisis of fossil fuels, the development and application of biomass fuels have become the focus of attention. Among them, biogas, as a renewable energy, has the characteristics of low utilization cost and no pollution to the environment. They are high-quality environment-friendly fuels and can replace traditional fossil energy. With the rapid development of large-scale biogas and biogas projects, the demand for biogas purification equipment for high value-added biogas is becoming more and more urgent. Biogas purification technology has been applied and developed to varying degrees.
Anaerobic reaction will produce biogas, which usually contains a certain amount of hydrogen sulfide. The content of hydrogen sulfide in biogas is different in different industrial wastewater. If the content of hydrogen sulfide is too high, the hydrogen sulfide in biogas must be removed before entering the boiler to avoid corroding the pipeline and boiler. Are you clear enough about these characteristics of biogas purification equipment?
This is a method of using biological strains to remove highly corrosive and highly toxic hydrogen sulfide gas from biogas. The process has the advantages of high degree of automation, simple process and low operation cost. The biogas generated by anaerobic fermentation enters the washing tower and absorbs reaction with the basic circulation sprayer to remove hydrogen sulfide from the biogas. The hydrogen sulfide absorbed from the rich solution is returned to the bioreactor. After biotransformation, hydrogen sulfide is converted into solid sulfur, and the solution is regenerated into alkaline absorption solution, which can be used to wash biogas, and then complete the recycling of absorbent. The separation of sulfur solids is completed by sulfur precipitator.
The purification equipment of biogas purification combines the physical and chemical absorption of hydrogen sulfide under weak alkaline conditions with the biological regeneration of alkaline solution in the air. Biogas without hydrogen sulfide escapes from the top of the scrubber, and the solution containing hydrogen sulfide flows into the bioreactor. Under the condition of limiting oxygen supply, it is oxidized to elemental sulfur and alkali. A small amount of wastewater and by-product sulfur do not contain sulfide and can be discharged directly.
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2021-07-28
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