The multi-effect falling film evaporator is a kind of equipment used for low-temperature continuous evaporation and concentration. It is composed of various effects heating evaporator, various effect separators, condensers, hot pressure pumps, sterilizers, insulation pipes, vacuum systems, various effects of material and liquid transfer pumps, condensate drainage pumps, operating platforms, electrical instrument control cabinets, valves, pipelines and other systems.
The working principle of the multi-effect falling film evaporator is: the material solution enters the suction port of the circulating pump from the material pump, the pump is pressurized at this time, the solution enters the feed chamber of the evaporator after preheating, and then enters the heating tube for evaporation, and enters the separation chamber after evaporation, separating the steam from the liquid material, and the solution will flow into the suction port of the pump for recycling, and the evaporated steam is separated from the concentrate, and the secondary steam is reused by the condenser. In the counter-current operation, the operation is about the same, and the discharge port of the concentrate should be placed in the first calibration, because the temperature of the first calibration is higher, which will reduce the viscosity of the solution, so as to obtain a higher concentration of concentrate.
The characteristics of the multi-effect falling film evaporator are that its structure is relatively compact, the layout is also reasonable, and the footprint is small, which is easy to install. In addition, it has a high production efficiency and a huge amount of evaporation. In terms of energy use, the energy-saving effect of multi-effect falling film evaporator is very significant, and the energy consumption is about one-third of that of general falling film evaporator.
In general, the multi-effect falling film evaporator is a high-efficiency and energy-saving equipment, which is suitable for the evaporation and concentration of a variety of materials.