DSS2205 MVR Evaporator Horizontal Tube Evaporator 5T/HR For NaCl

DSS2205 Tube Falling Film Evaporator Used For NaCl Evaporation and Crystallation

Introduction

Falling film evaporation means that the feed liquid is added from the upper tube box of the heating chamber of the falling film evaporator, evenly distributed into each heat exchange tube through the liquid distribution and film forming device, and flows in a uniform film from top to bottom under the action of gravity and vacuum induction and airflow. In the process of flowing, it is heated and vaporized by the shell-side heating medium, and the generated steam and liquid phase enter the separation chamber of the evaporator together. After full separation of the steam and liquid, the steam enters the condenser for condensation (single-effect operation) or enters the next-effect evaporator as the heating medium, thus realizing multi-effect operation, and the liquid phase is discharged from the separation chamber

Advantage

1) The feed liquid of the falling film evaporator is added from the top of the evaporator, and falls along the tube wall in a film shape under the action of gravity, and in this process, it is evaporated and concentrated to obtain concentrated solution at the bottom. Falling film evaporator can evaporate materials with high concentration and viscosity.

2) Because the solution flows in a film shape in the one-way evaporator, the heat transfer coefficient is high.

3) The residence time is short, which is not easy to cause deterioration of materials, and it is suitable for treating heat-sensitive materials.

4) The liquid retention is small, and the falling film vaporizer can operate quickly according to the changes of energy supply, vacuum degree, feed rate and concentration. Near constant,

5) Because the process fluid only flows under the action of gravity, instead of being driven by high temperature difference, low temperature difference evaporation can be used.

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