... ,blender,transfer pump;2,Blending system:catalyzing treatment tank,blender,vacuum system;3,Distillation system:distillation tower,distillation kettle,circulation ... ,first stage cooler,second stage cooler;5,Vacuum system:vacuum cooler,vacuum water tank,vacuum pump set; ... system:Instruments and control cabinet;V,Oil quality after treatment:1,The characteristics of domestic oil after treatment:Oil analysis ...