... ,blender,transfer pump;2,Blending system:catalyzing treatment tank,blender,vacuum system;3,Distillation system:distillation tower,distillation kettle,circulation ... pump,heat exchanger;4,Cooling system:water pump,cooling water reservoir,first stage cooler, ... second stage cooler;5,Vacuum system:vacuum cooler,vacuum water tank,vacuum pump set;6 ...