The role of axial flow pump in multi-effect evaporation

1. Introduction to multi-effect evaporation

Multi-effect evaporation is a technology that efficiently uses heat energy for evaporation and concentration, which is widely used in chemical, food, pharmaceutical and other fields. In multi-effect evaporation processes, where the liquid needs to be pumped into an evaporator for evaporation, horizontal axial flow pump is a very common option.

2. the role of axial flow pump in multi-effect evaporation

① Fluid Transfer: The axial flow pump in multi-effect evaporation transports the liquid from the low-pressure area to the high-pressure area through the rotation of the rotor, so that the liquid flows. In this way, the axial flow pump in the multi-effect evaporation center can realize the transfer of a large amount of liquid to meet the needs of multi-effect evaporation.

② Pressure increase: In multi-effect evaporation, the liquid needs to be sent to an evaporator at high temperature and high pressure for evaporation. The multi-effect evaporation axial flow pump can increase the pressure of the liquid to meet this demand.

③ Energy conversion: In the process of converting electrical energy into mechanical energy, the axial flow pump in the multi-effect evaporation will generate a certain amount of heat. This part of the heat can be applied to the multi-effect evaporation process to improve the efficiency of evaporation and save energy.

The selection of circulating pumps for multi effect evaporators during the crystallization process generally chooses the form of axial flow pumps, which are divided into vertical axial flow pumps and horizontal axial flow pumps according to different installation forms. The characteristics of axial flow pumps are high flow rate, low head, slow speed, and low power consumption;

For those with high head and small circulation, mixed flow pumps can be chosen. Some manufacturers choose the form of centrifugal pumps when designing circulating pumps, and try to use multi-stage motors to reduce impeller speed. The impeller should be an open impeller to reduce damage to the grains and prevent blockage.

As the crystallization discharge pump belongs to solid-liquid mixture, it is generally recommended to choose screw pump or diaphragm pump. For those who do not have strict requirements for crystal particle size, centrifugal pump can also be used.