Biogas can be produced by anaerobic treatment of wastes containing a large amount of organic wastes, such as livestock and poultry wastes, sludge from municipal sewage treatment, municipal domestic waste and kitchen waste. Biogas is a kind of combustible gas produced by specific microorganisms degrading organic matter under anaerobic conditions. At present, the technologies widely used in the utilization of biogas resources are mainly the purification of biogas to produce natural gas and the generation of electricity by biogas. In this paper, the process of biogas purification of natural gas is analyzed, hoping to be helpful to everyone!
Purification of natural gas by biogas requires the following treatment:
1. Moisture removal: Avoid focusing water in equipment gas pipeline, and hydrogen sulfide will produce corrosive acid solution, causing corrosion. According to the analysis of the biogas composition on the upper surface, the following treatment is needed for the production of natural gas from biogas:
2. Removal of hydrogen sulfide: hydrogen sulfide is toxic and corrosive, which will corrode equipment and cause pollution by sulfur dioxide generated during combustion. Therefore, the concentration of hydrogen sulfide must be reduced until it meets the requirements of production equipment and relevant national standards for sulfur dioxide emission limits.
3. Carbon dioxide removal: increase the calorific value of biogas.
In order to purify natural gas from biogas, desulfurization and decarbonization processes should be adopted to reduce the content of H2S and CO2 in biogas and increase the content of CH4. The purified biogas contains more than 490% CH4, and its composition is similar to that of natural gas, so it can be used as natural gas. In addition, the way of biogas purification to produce natural gas has less investment and better economic benefits, which is worthy of being widely used.
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