PROCESS DESCRIPTION1),Waste engine oil Pre-processing
Settling tank. Put waste engine oil into the settling tank, separate the water first,then go through the 200 mesh filter to remove those impurities such as solid and suspended solid.
2),High temperature flocculation to neutralize the tops
Reboiler. Pump the waste oil that have been pro-processed into the reboiler,in the condition of vacuum catalyzing and heat-exchanging to raise the temperature to 310℃ to 320 ℃
3),Distillation by using vacuum film evaporator
After the temperature raised to 310℃ to 320 ℃ through reboiler,the oil will be absorbed into the first level taber type film evaporator(vacuum degree -0.096--0.098MPa),and can generate a flash vaporization distillation process,gasifying to distill the light oil components,the first level oil come out.
Those pre-processed oil that can not be flash gasified distillation,will be equably distributed to the upper of vacuum evaporation surface in the effort of the evaporator distributor.Then goes to the second level taper type vacuum film evaporator.When the temperature of evaporation surface reach 375 ℃--385℃,vacuum degree(-0.096--0.098),the second level flash evaporation gasifying process begins.By gasifying and distilling the light base oil components,the second level oil come out.
The other oil that failed to be gasified and distilled will go into the third level taper type vacuum film evaporator.When the temperature of evaporation surface reach 430 ℃--450℃,vacuum degree(-0.096--0.098),the third level flash evaporation gasifying process begins.By gasifying and distilling the heavy base oil components,the third level oil come out.
Those heavy residue oil(asphaltene,colloid) that by no means cannot be gasified and distilled,in the end will produce a little waste materials(1%-3%) into the receiver tank,then be discharged.
4),Refining (Distillation sites)
The first level oil ,second level oil,third level oil that come out through the vacuum film evaporator,will go through the rotating wire mesh demister/skimmer(on top of the evaporator),to remove and purify the heavy residue oil foam drops.Those more purifier oil goes into the distillation tower to divide;According to the amount ,the receiver oil goes into the high temperature vacuum clay adsorption to refine.
The after refining base oil will go into their own storage tank after filtering and cooling down(temperature 50℃--60℃)