In the rising film evaporator, the liquid enters into the heating
tube for heatin by adopting the principle of siphon pump and flows
into the separator, after that, the liquid and steam are separated
and then return to the evaporator through the circulation pipe, and
closed circulation is formed. therefore , this evaporator is also
called external circulation evaporator. when it comes to the
evaporator selection, if the evaporation is higher the
multi-effect device can be adopted to achieve the pupose of saving
steam and reducing energy consumption.