公开(公告)号：US20220389337A1

公开(公告)日：2022-12-08

申请号：US17755418

申请日：2020-09-24

申请人： CHINA PETROLEUM & CHEMICAL CORPORATION ,  BEIJING RESEARCH INSTITUTE OF CHEMICAL INDUSTRY, CHINA PETROLEUM & CHEMICAL CORPORATION

发明人： Huawei SHAO ,  Dongfeng LI ,  Yi ZOU ,  Zhixin LIU ,  Chunfang LI ,  Liang GUO ,  Jingsheng ZHANG ,  Zhiyan HU

IPC分类号： C10G70/06 ,  C10G70/04 ,  C10G5/04 ,  C10G5/06 ,  F25J3/06 ,  B01D53/00 ,  B01D53/14 ,  B01D53/18

摘要： A method for recovering C2 components in a methane-containing industrial gas includes the steps of (1) cooling a compressed methane-containing industrial gas and performing gas-liquid separation; (2) absorbing C2 components in the gas phase by using an absorbent to obtain an absorption rich liquid; (3) returning the absorption rich liquid to the compression in step (1) or mixing the absorption rich liquid with the liquid phase obtained in step (1) to obtain a mixed liquid, and depressurizing the mixed liquid or the absorption rich liquid; (4) performing methane desorption on the depressurized stream to obtain a rich absorbent, or performing second gas-liquid separation on the depressurized stream, followed by methane desorption on the second liquid phase to obtain a rich absorbent; and (5) desorbing and separating the rich absorbent to obtain a lean absorbent and an enriched gas, and recycling and reusing the lean absorbent.