The forced circulation evaporator utilizes external power for circulation, employing a pump to force the solution to pass through the heating tubes at a velocity of 2-5m/s in one direction. This is done to prevent the formation of fouling or crystallization due to boiling products on the heating surface. To achieve this, the flow velocity within the tubes must be high. As the circulating liquid flows through the heat exchanger, it is heated, and then partially evaporates when the pressure in the separator is reduced, cooling the liquid to its boiling point temperature corresponding to that pressure. Due to the circulation pump, the operation of the evaporator is largely independent of temperature differences. The recirculation rate of the material can be precisely adjusted, and the evaporation rate is set within a certain range. In crystallization applications, crystals can be separated from the circulating slurry by adjusting the circulation flow rate and using a special separator design. The equipment employs a pump for forced circulation, resulting in high evaporation rates and high concentration ratios, making it particularly suitable for the evaporation of materials with high concentrations or viscosities.