The basic principle of the external circulation evaporator is to heat the dilute solution to boil, so that some of the water vaporized, and achieve the purpose of concentrated solution. During the operation of the equipment, the heating medium (boiler steam) enters the shell of the heater, and the material liquid enters the pipe of the heater. After the material liquid is heated, the liquid level rises, and the material liquid in the separator is sprayed into the separator from the circulation tube to the lower part of the heater for steam and liquid separation. The material liquid in the separator returns from the circulation tube to the lower part of the heater and is then heated and sprayed into the separator again to form a cycle and shrink to a certain extent. The material shall be discharged from the discharge port after the sample is confirmed to be qualified. After the secondary steam is removed from the foam by the defromer, it enters the shell of the tubular condenser, is cooled into liquid by the cooling water in the pipe, enters the condensate water collection tank, is discharged by the condensate pump, and the non-condensing gas is removed by the vacuum pump. In the double-effect or multi-effect evaporator, the secondary steam generated by the single-effect heater can enter the next effect heater as the heating medium, and the heat energy can be fully utilized, so as to realize the energy-saving effect.
Performance characteristics of traditional Chinese medicine extraction and concentration equipment:
1, external heating natural cycle and vacuum negative pressure evaporation want to combine, evaporation speed is fast, concentration ratio can reach about 1.3;
2, can be used for alcohol and other solvents recovery, recovery of alcohol concentration up to 80 degrees;
3, compared with other forms of evaporation and concentration equipment such as falling film evaporator, the equipment investment cost is relatively low;
4. The equipment is concentrated in natural circulation mode, without more power control units, and the production and operation cost is relatively low;
5, all equipment is made of 304 or 316L stainless steel, internal and external surface polishing treatment, in line with GMP;
6, the equipment stable performance, simple operation, beautiful appearance, clean health, easy to clean.
7, different effectors can concentrate different varieties of materials at the same time;
8, the equipment structure is compact, the user plant height and layout without too much requirements, easy to disassemble, shift and transport.
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