首页>
外国专利>
Processing of biogas for supplying into natural gas network of the quality level of low-gas, comprises removing impurities such as ammonia, hydrogen sulfide, sulfur dioxide and organic sulfur compounds from the biogas
Processing of biogas for supplying into natural gas network of the quality level of low-gas, comprises removing impurities such as ammonia, hydrogen sulfide, sulfur dioxide and organic sulfur compounds from the biogas
The method for processing of biogas (1) for supplying into natural gas network of the quality level of low-gas (L-gas), comprises removing impurities such as ammonia, hydrogen sulfide, sulfur dioxide and organic sulfur compounds from the biogas impurities, completely separating carbon dioxide (5) contained in the biogas, splitting air into oxygen and nitrogen (95 vol.%) by change in pressure adsorption, compressing the nitrogen and then admixing to highly pure methane (2) for reducing heat output and dehumidifying the formed methane/nitrogen mixture (L-gas). The method for processing of biogas (1) for supplying into natural gas network of the quality level of low-gas (L-gas), comprises removing impurities such as ammonia, hydrogen sulfide, sulfur dioxide and organic sulfur compounds from the biogas, completely separating carbon dioxide (5) contained in the biogas, splitting air into oxygen and nitrogen (95 vol.%) by change in pressure adsorption, compressing the nitrogen and then admixing to highly pure methane (2) for reducing heat output in metered manner, and dehumidifying the formed methane/nitrogen gas mixture (L-gas). The methane and nitrogen are combined by a static mixing process. The water/methane/nitrogen mixture resulting from dehumidifying process is separated by condensation of the gas mixture (3) and then led back into the biogas flow and the water is led back into the wash process. The nitrogen of 10-35 m 3/m 3 of the methane is added for the reduction of the heat output of the methane to 1 kWh/m 3. The metered quantity is measured on nitrogen as a function of the carbon dioxide content of the methane. The separation of carbon dioxide from the biogas takes place by an amine wash on a carbon dioxide content of below 2 vol.%. The produced oxygen for the biocatalytic desulfurization of biogas is introduced into a fermenter of a biogas plant or a separate desulfurization plant. The carbon dioxide and sulfur from the biogas are separated by a wash with an amine containing washing solution (6) under normal pressure and standard temperature. An independent claim is included for a plant for the processing of biogas.
展开▼
机译：将沼气的质量水平提供给天然气网络的沼气处理方法（1），包括从沼气杂质中去除氨，硫化氢，二氧化硫和有机硫化合物等杂质，完全分离沼气中包含的二氧化碳（5），通过改变压力吸附将空气分解为氧气和氮气（95 vol。％），压缩氮气，然后与高纯甲烷（2）混合以降低热量输出并除湿形成甲烷/氮气混合物（L气）。沼气的处理方法（1），以低水平（L-gas）的质量水平供应到天然气网络，包括从沼气中完全去除诸如氨，硫化氢，二氧化硫和有机硫化合物的杂质。分离沼气中包含的二氧化碳（5），通过改变压力吸附将空气分成氧气和氮气（95 vol。％），压缩氮气，然后与高纯甲烷（2）混合以计量方式减少热量输出，使形成的甲烷/氮气混合物（L-气体）除湿。甲烷和氮气通过静态混合过程合并。除湿过程中产生的水/甲烷/氮混合物通过气体混合物（3）的冷凝而分离，然后被引回到沼气流中，而水被引回到洗涤过程。添加10-35 m 3> / m 3>的氮气以将甲烷的热输出降低至1 kWh / m 3>。所计量的量是根据氮气测量的，作为甲烷中二氧化碳含量的函数。通过胺洗涤在二氧化碳含量低于2体积％的条件下从沼气中分离二氧化碳。将产生的用于沼气的生物催化脱硫的氧气引入沼气厂或单独的脱硫厂的发酵罐中。通过在常压和标准温度下用含胺的洗涤溶液（6）洗涤，将沼气中的二氧化碳和硫分离。独立权利要求包括用于处理沼气的植物。
展开▼
