In view of the crisis of fossil fuel depletion, the development and application of biomass fuel has become the focus of attention. As a renewable energy, biogas has the characteristics of low cost and no pollution to the environment. They are high-quality environmental protection fuels, which can replace the 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 increasingly urgent. Biogas purification technology has been applied and developed in different degrees.
Anaerobic reaction will produce biogas, usually containing 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, hydrogen sulfide in biogas must be removed before entering the boiler to avoid corrosion of pipes and boilers. Are you clear enough about these characteristics of biogas purification equipment?
This is a method of using biological strains to remove highly corrosive and toxic hydrogen sulfide gas from biogas. The process has the advantages of high 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 liquid 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 recycle the absorbent. The separation of sulfur solids is accomplished by sulfur precipitator.
Biogas purification equipment combines physical and chemical absorption of hydrogen sulfide under weak alkaline conditions with biological regeneration of alkaline solution in air. The 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 limited oxygen supply, it is oxidized to elemental sulfur and alkali. A small amount of waste water and by-product sulfur do not contain sulfide and can be directly discharged.
1. Automatic unattended, stable and reliable operation process.
2. The sulfur in biogas can be removed by deep layer.
3. The gas flow does not fluctuate much.
4. Biogas is not diluted by air.
5. There is no risk of clogging and scaling, and long-term maintenance is not required.
6. Normal temperature and pressure operation.