Principle of forced circulation evaporator

The forced circulation evaporator is an evaporator that relies on external power to circulate. The forced circulation evaporator is more suitable for the evaporation of crystallinity, fouling, high concentration, high viscosity, and insoluble solidified waste water and waste liquid. concentrate. This is because of the characteristics of the forced circulation evaporator principle.

The principle of the forced circulation evaporator is to rely on a forced circulation pump to force the solution to pass through the heating tube at a speed of 2~5m/s in one direction for evaporation, concentration or crystallization. The circulation of the solution in the equipment mainly depends on the forced flow generated by the external power. The circulation speed in the forced circulation evaporator can reach 1.5~3.5 m/s, and the heat transfer efficiency and production capacity are relatively large.

The raw material liquid of the forced circulation pump is pumped in from bottom to top by the circulation pump, and flows upward along the tube of the heating chamber. The mixture of steam and liquid foam enters the evaporation chamber and separates. The steam is discharged from the upper part, and the fluid is blocked from falling, and is sucked by the circulating pump through the conical bottom, and then enters the heating pipe to continue the circulation.

The forced circulation evaporator has large heat transfer coefficient, anti-salt precipitation, anti-scaling, strong adaptability, and easy to clean.

The forced circulation evaporator is mainly used to avoid the product boiling on the heating surface, which may cause fouling or crystallization. For this reason, the flow velocity in the tube must be high. When the circulating liquid flows through the heat exchanger and is heated, when the pressure in the separator decreases, it partially evaporates, thereby cooling the liquid to the boiling temperature under the corresponding pressure.

During the crystallization process, the circulating flow rate can be adjusted and a special separator design can be used to adjust the crystals and crystallize them according to the required size.


Post time: Sep-06-2020