沼气的净化提纯技术是沼气资源化利用中非常重要的一个环节.介绍了农村沼气的组成,并总结了现有的沼气净化提纯的主要方法及其特点.目前沼气的净化提纯技术主要是脱硫、脱碳、脱水及脱除其它不助燃的杂质.其中,脱硫技术主要有干法、湿法及生物法脱硫等;脱碳主要有液体吸收法、固体吸附法和膜分离法等;脱除水分主要有冷凝法、溶剂吸收和固体吸附3种方法.此外,还总结了脱除硅氧烷、卤化烃及氮气等杂质的方法.在此基础上,提出了我国农村地区沼气资源化利用的方向--根据沼气利用方式的不同,选择不同的净化利用技术.%Purification of biogas is an important process in the utilization of biogas resources. This paper introduces the composition of biogas in rural areas, and the existing primary metheds and characteristics of the purification of biogas are summarized. At present the purification technology of biogas mainly is to remove carbon dioxide, hydrogen sulphide and water vapor (H2O). Desulphurization technology mainly includes dry desulfurization, wet desulfurization and biological desulfurization, etc. , the removal of carbon dioxide mainly have three kinds of method, such as liquid absorption, solid adsorption and membrane separation, and the removal of water vapor in biogas mainly have condensation method, liquid absorption and solid adsorption and so on. In addition, some methods of the removal of siloxane,halogenated hydrocarbons, and nitrogen and other impurities were introduced. With the actual situation,a direction of resource utilization of biogas in rural areas is put forward: According to the different methods of using biogas, a different technology of purification and utilization should be ehoosen so that biogas can be used efficiently.
展开▼
