Methyl acetate production waste gas recovery equipment and use method thereof

The invention discloses methyl acetate production waste gas recovery equipment and a use method thereof, and relates to the technical field of waste gas recovery, the waste gas input process and the waste gas discharge process are separated, the waste gas is subjected to primary condensation in the waste gas input process to obtain liquid and gas, the gas discharge process mainly aims at the gas, and on the basis, the waste gas is recycled. Three gas/liquid flowing directions are formed through a movable piston rubber block, and the purposes are that the piston rubber block is matched with the treatment capacity of the treatment tower, the gas amount in the discharging process is automatically switched according to the treatment capacity, and the situation that the treatment effect of the treatment tower is affected by the input process of waste gas with different yields is avoided. The arrangement position of a piston rubber block is switched by combining gas change in the transfer bin, gas stored in the tra