Shale gas impurity removal, rectification, separation and liquefaction equipment

The utility model relates to a gas separation device, in particular to shale gas impurity removal, rectification, separation and liquefaction equipment. The shale gas impurity removal, rectification separation and liquefaction equipment comprises a shale oil washing condensation recovery system, a crude benzene recovery system and a rectification separation system which are connected in sequence, wherein the shale oil washing condensation recovery system comprises a heavy oil washing tower, a middle oil washing tower and a water washing tower which are connected in sequence; the crude benzene recovery system comprises a benzene washing tower; the rectification separation system comprises a rectification separation unit and a liquefaction unit; shale gas treated by the shale oil washing condensation recovery system and the crude benzene recovery system can have higher efficiency and gas quality in the subsequent rectification treatment process, harmful gas in the shale gas can be effectively removed, and the e