通过脱碳剂将沼气中的CO₂吸收，脱碳剂再生回收循环利用，脱碳剂与再生剂生成高纯纳米碳酸钙售出，以达到提纯沼气的目的。装置具有投资省、运行成本低、安全可靠、副产品价值高等特点。

By using decarbonizers to absorb CO2 from biogas, the decarbonizers are regenerated, recycled, and reused, and the decarbonizers and regenerators generate high-purity nano calcium carbonate which can be sold, and achieve the goal of purifying biogas. The device has the characteristics of low investment, low operating costs, safety and reliability, and high value of by-products.