Biogas is a kind of clean energy, which can be obtained by fermentation of a variety of biomass. China has huge reserves of biomass resources, including agricultural, industrial and municipal solid waste, as well as by-products of other related industries. For example, there are many ways to use natural gas for heating, purification and chemical co generation after vehicle combustion, or directly use natural gas as heating raw materials. Biogas prepared by purification of biogas can completely replace petrochemical natural gas. According to the existing technical level and economic feasibility, China can convert 120 billion cubic meters of equivalent biological natural gas, which can greatly reduce China's dependence on Petrochemical Natural gas.

沼气提纯精制生物天然气是沼气提纯净化制备高品质生物天然气、大幅提升甲烷利用品质的技术。目前沼气脱碳的主要工艺包括有机胺吸收法、压力水洗法、膜分离方法、变压吸附法、物理吸收法、深冷分离法等。而本项目开发的沼气加压水洗技术集成了水洗脱碳过程中闪蒸技术的合理有效利用技术、吸收塔解吸塔内部核心部件的开发、同步回收二氧化碳技术、沼气工程的能量集成系统设计和自动化控制系统设计等多个方面进行优化设计和开发。本项目开发的沼气加压水洗技术结合撬装设备的设计理念，可在各种处理规模的沼气工程中加以应用推广。

Biogas purification and purification of biological natural gas is a technology of biogas purification and purification to prepare high-quality biological natural gas and greatly improve the utilization quality of methane. At present, the main processes of biogas decarbonization include organic amine absorption method, pressure washing method, membrane separation method, pressure swing adsorption method, physical absorption method, cryogenic separation method, etc. The biogas pressurized water washing technology developed in this project integrates the reasonable and effective utilization technology of flash technology in the process of water washing and decarbonization, the development of core components in the absorption tower and desorption tower, the technology of synchronous carbon dioxide recovery, the design of energy integration system and automatic control system of biogas engineering. Combined with the design concept of skid mounted equipment, the biogas pressurized water washing technology developed in this project can be applied and popularized in biogas projects of various treatment scales.

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