Membrane separation technology is considered to be an extremely important technology in the industrial technological transformation in the 21st century. With the emergence of new membrane materials with excellent performance, further development of high-efficiency and low-cost membrane separation technology for biogas decarbonization will be helpful to recommend the development of biogas industry.
Biogas membrane separation refers to the separation and purification of CH4 by using the different permeation rates of components in biogas in the gas separation membrane under the driving force of pressure difference.
When the compressed biogas without liquid water and oil flows along the inner cavity of the hollow fiber tube, the partial pressure of various gases is formed by the driving force differential pressure between the high-pressure side (raw material side) and the low-pressure side (permeation side) of the hollow fiber tube, and the gas with large dissolution coefficient and diffusion coefficient (such as CO2) preferentially passes through the tube wall, and the other gases (CH4) are relatively blocked, so as to achieve the partial pressure The purpose of departure.
At present, the most suitable membranes for biogas purification are polyamide membrane and EC membrane. A large number of biogas projects at home and abroad have used membrane methods to propose technologies. The more widely promoted and applied ones are medal in the United States, DMT in the Netherlands, Evonik in Germany, memfoact in Norway and Ube in Japan.
膜法分離的特點：
Characteristics of membrane separation:
除電耗外，無額外輔助材料，沒有二次污染；
Except for power consumption, there is no additional auxiliary material and no secondary pollution;
工藝流程簡單、可靠性高；
The process is simple and reliable;
投資及運行費用低；
Low investment and operation cost;
占地面積小、開停車簡單、使用壽命長；
The utility model has the advantages of small floor area, simple start and stop, and long service life;
產品CH4純度可達≥95%；
The CH4 purity of the product can be more than 95%;
企業二維碼
2019-12-19
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