natural circulation evaporator

Natural circulation evaporator: Product overview and features: The solution in the natural external circulation evaporator circulates based on the density difference between the material and liquid. To prevent scaling and crystallization, the heating tubes should be operated completely submerged. This type of evaporator is suitable for concentrating solutions with less severe scaling and less corrosiveness. Its advantages are simple structure, easy manufacturing and low power consumption. The disadvantage is that the solution circulation speed is slow and it is not suitable for materials with high viscosity and a large number of crystals. It cannot be cleaned on the spot. The material is heated for too long, so it is not suitable for heat-sensitive materials.
Working principle: Externally heated natural circulation evaporator: The liquid is heated in the heating chamber tube, the temperature rises, and the density becomes smaller. The density difference with the cold solution in the circulation pipe causes the liquid to move upward in the heating tube and inward in the circulation tube. circulating flow below. The heated solution enters the evaporation chamber to flash and cool down in the form of sensible heat. Then it goes down into the circulation tube and is heated and evaporated by circulation. The circulation speed of the solution in the equipment is not large, generally less than meters/second.