In recent years, due to the increasingly serious environmental problems and energy pollution problems, biomass energy has gradually become one of the research ways of new energy, which also derived the relevant research on biogas energy purification. At present, vigorously developing the natural gas industry has become an important strategic way to optimize the energy structure and realize low-carbon development in our country, and it is a very important measure. Because China's natural gas is in a stage of rapid development, supply and consumption are rising rapidly, so there is often a shortage of natural gas. In order to deal with this situation, and from a theoretical point of view, out of the dual consideration of energy and environmental problems, the research and development of biogas purification to produce biological natural gas can not only achieve high-yield natural gas resources, but also achieve a more prominent role in environmental protection. The economic value and social value are more prominent, and the development of renewable energy such as biomass energy can be improved It has aroused great concern. As a new type of renewable energy, the development and utilization of biogas is in line with the national industrial policy, with huge commercial value and broad development and utilization prospects.
Biogas is a mixture of many gases, mainly containing methane and carbon dioxide. Methane accounts for 55% ~ 70% and carbon dioxide accounts for 30% ~ 45%. Biogas purification to produce biogas (hereinafter referred to as biogas purification) refers to the biogas produced by anaerobic fermentation. After desulfurization, decarbonization, dehydration, pressurization and other processes, biogas becomes biological natural gas (bng) for efficient utilization. It can not only fully utilize waste, but also save energy and environmental protection. It is a kind of green energy and has great development prospects.