Tail gas reclaiming device in polyimide film producing process

The utility model discloses a tail gas reclaiming device in a polyimide film producing process in the field of tail gas reclaiming devices. The tail gas reclaiming device comprises a condenser and an absorption tower, wherein one end of the shell of the condenser is connected with a tail gas inlet pipe, and the other end of the shell of the condenser is connected with the absorption tower through an intermediate connecting pipe; the absorption tower comprises a vertically arranged tower body; a tail gas exhaust port is formed on the top of the tower body; the upper part of the absorption tower is provided with a spray distributor; a grid tray is arranged under the spray distributor; a packing layer is arranged on the grid tray; the packing height of the packing layer is lower than that of the spray distributor; a plurality of slow flow distribution plates are horizontally arranged under the grid tray; a condensate discharge port on the lower part of the tower body is connected with the inlet of a circulating pump; and the outlet of the circulating pump is divided into two paths, one path is connected with the spray distributor through an absorption liquid inlet, and the other path is connected with an absorption liquid storage tank. According to the tail gas reclaiming device, the reclamation rate of dimethylacetamide is over 98 percent, the tail gas emission pollution can be effectively reduced, and the dimethylacetamide can be reclaimed and recycled.