Evaporation cylinder

The utility model provides an evaporation cylinder which comprises a cylinder body used for storing sewage, a detachable top cover is installed at the upper end of the cylinder body, a steam outlet pipe is fixedly connected to the top of the top cover, an air inlet pipe used for being connected with a hot air conveying pipe is installed on the outer surface of the lower end of the cylinder body, and a blow-down valve is installed in the middle of the bottom of the cylinder body. Two detachable threaded rods are symmetrically installed in the barrel, the two threaded rods are each sleeved with a plurality of baffles, the positions, making contact with the threaded rods, of the upper surfaces of the baffles are sunken downwards to form round holes, the threaded rods penetrate through the round holes, the baffles are of a semicircular structure, the baffles on the two threaded rods are alternately arranged, and the baffles on the two threaded rods are arranged in a staggered mode. The upper side and the lower si