The tank includes distillation kettle shell and head on the top of the distillation kettle shell and head on a gas outlet, the head below the demister, in addition to the bottom of the eliminator for storing material chamber, the upper part of the material storage chamber is feed, set up indoor evaporator, the lower part of the distillation kettle for solid like material and the high boiling point compound sedimentation chamber, in the sedimentation chamber is provided with a stirrer, stirrer shaft through the shaft seal with an external motor is connected, the bottom of the distillation kettle set solid substance and high boiling point material discharging outlet. The advantages are that the solid and the high boiling point can be discharged at any time, and the cleaning is not interrupted, so as to ensure the continuous production.