Drawing the filtered or settled crude oil into the neutral pot, control oil temp 40 °C, liquid level about 80 % ofneutral pot volume.Add into the neutral pot P-acid with 85% concentration, 0.1-0.2% oil weight. Start up neutral pot, make main shalf stirring at 60-70 r/min, finish de-gumming in 30 min.
(2)Alkali de-acid operation of crude oil refinery
After finish de-gumming process, at once add into lye carrying alkali refining de-acid, lye concentration 16 °C, super alkali is 0.1-0.3% oil weight, after finish adding, continuous stirring 30min, when soap particles accumulated condensing, should reduce stirring speed, 30r/min avoid emulsion. After adding alkali, gradually rising temp to the end temp 65 °C, the rising temp speed should be 1 degree per minute. Shut off neutral pot drive part, the oil settled in the pot 6-8 hours, make oil separate from soap.
(3).De-watering of crude oil refinery
Starting vacuum, open the vacuum valve, make the pot inside vacuum above 750mmHg , inhale the clear oil after water rinse into the de-color pot. Start up de-color pot main axis, stirring at 30r/min, and make the pot inside oil temp reach 90 - 95 °C, carrying vacuum dry hydrate.after 30 min, no frog in the pot, indicate that the dehydrate finished.
(4).De-coloring of crude oil refinery
After dehydrate, inhale 3-5% oil weight active clay into the de-color pot to carry absorb de-coloring. De-color pot main axis stirring speed 60r/min, time 20 min, vacuum degree 750mmHg, is the whole absorb de-color craft process requirement. Shut off vacuum valve, open vacuum break valve, stirring non-stop, decreasing the oil temp to 70 °C.Continuous stirring, open oil outlet valve, press the de-color oil into the press filter, filter away waste clay, the last use air compressor blow clean and dry.
(5).De-odor operation of crude oil refinery
Open the vacuum valve, make the pot inside vacuum degree gradually reach above 750mmHg.
Inhale the de-color oil after filter into the deodor pot, see to that oil amount should cover the pot volume 60%.Control oil temp at 240 °C - 260 °C, use thedirect steam under 0.1 -0.3Mpa to distillate 3-4 hours.
Shut off steam&heat source, when the oil temp belows 80 °C, shut off vacuum, release deodor oil. Until now, the product oil after deodor is high cooking oil, there are somefactories carrying again one time fine filtering after deodor to increase the oil qulity.
