... ,blender,transfer pump;2,Blending system:catalyzing treatment tank,blender,vacuum system;3,Distillation system:distillation tower,distillation kettle,circulation ... reservoir,first stage cooler,second stage cooler;5,Vacuum system:vacuum cooler,vacuum water tank,vacuum pump set; ... 6,Oil storage system:Receiving tanks for all distilled fractions;7,Control system:Instruments and control cabinet;V,Oil ...