Concentration device for concentrating alkali liquor

The concentration device comprises a concentrator body and a sealing tank, the concentrator body comprises a support, a gas-liquid separation tank and a plurality of heat exchange pipes, the gas-liquid separation tank is horizontally arranged on the support, the upper portion of the gas-liquid separation tank is provided with a steam outlet and material receiving ports, and the number of the material receiving ports is consistent with that of the heat exchange pipes. A liquid alkali outlet is formed in the bottom of the gas-liquid separation tank; the heat exchange tube is of a sleeve type structure, the two ends of an inner tube of the heat exchange tube are open and are respectively a liquid alkali inlet and a liquid alkali outlet, and a heating medium inlet and a heating medium outlet are formed in an outer tube of the heat exchange tube. The heat exchange tube is vertically arranged at the upper part of the gas-liquid separation tank, the heat exchange tube is fixedly connected with the bracket, and a liq