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The liquid raw materials solution is charged into the distributor of device which distributes the liquid evenly into every heating tube and make the liquid film falling down along the inside of tube, then the liquid film will be evaporate vaporization by the heat from tube wall outside. When heat transfer temperature difference is not too much, the evaporation happens not in the surface of inside tube wall, but on the surface of strongly disturbance film, so it is not scaled easily. the steam usually falling down with liquid film. Because of the big surface of vaporization, there is little liquid in steam. To prevent scaled, it is requested that all the heating surface should be evenly wet, and the distributor should be functional and not easily be blocked.
This kind of evaporator can resolve the problem of effective heat transfer temperature difference loss caused by static pressure, and the pressure reduce is very little, so it can be effectively transfer heat on the condition of small temperature difference. It also be used in multi-effective evaporation system.
We can supply product customization according to your process and design the product.