Recovery and concentration process and device for dimethyl carbonate

The invention discloses a dimethyl carbonate recovery and concentration process in the technical field of petrochemical engineering, which comprises the following steps: 1) introducing a DMC-containing gas phase feed into an absorption tower from the bottom, taking methanol as an absorbent at the tower top, taking DMC concentration liquor as an absorbent at the middle part of the tower, extracting inert components from the top of the absorption tower, and collecting the DMC-containing gas phase feed from the top of the absorption tower; a DMC-methanol solution containing light components is extracted from the bottom of the tower; (2) introducing a product extracted from the bottom of the absorption tower in the step (1) into a light component removal tower, wherein a product in the bottom of the light component removal tower is DMC concentrated liquor, and a product in the top of the light component removal tower is light components; and (3) feeding one part of the DMC concentrated solution in the step (2) as