The column is reboiled by a falling film evaporator provided with a recirculation pump, and fed by steam under flow control reset by the temperature in the column itself.

• 塔由下降蒸汽膜(提供热量)再沸腾；其蒸汽膜由一个通过塔自身内部的温度；来控制流量设定的循环泵泵入蒸汽(而形成的).