1. Introduction of palm oil fractionation machinery
(1).P-acid degumming operation:
Drawing the filtered or settled crude oil into the neutral pot, control oil temperature 40 ° C, liquid level cover the neutral pot volume about 80 %.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:
After finish de-gumming process, at once add into lye carrying alkali refining deacid, lye concentration 16 ° Be ′,
super alkali is 0.1-0.3% oil weight, af-ter 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, see to that the rising temp speed should control at 1 degree per minute, not too fast.
Shut off neutral pot drive part, the oil settled in the pot 6-8 hours, make oilseparate from soap.
(3)water rinse operation:
Adjust the neutral pot oil temp to about 85 ° C, add into hot water whose temp higher oil temp 10-15° C, the water use
amount each time is 10-15% oil weight.Start neutral pot drive part, make the main shalf stirring washing at 30r/m-
in, make the oil and water fully contact, stirring time 5-10 min.If oil/soap separate not ideal, the oil contains relative
high left soap, the first time washing, better to use thin salt water evenly spray into oil.
After dehydrate, inhale 3-5% oil weight active clay into the de-color pot to carry absorb de-coloring.
Decolor pot main axis stirring speed 60r/min, time 20 min, vacuum degree 750mmHg, is the whole absorb decolor craft
process requirement. Shut off vacuum valve, open vacuum break valve, stirring non-stop, reduce the oil temp down
to 70 ° C, the de-color finished.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
Open the vacuum valve, make the pot inside vacuum degree gradually reach above 750mmHg.
Inhale the de-color oil after filter into the de-odor pot, see to that oil amount should
cover the pot volume 60% Control oil temp at 240 ° C - 260 ° C, use the direct steam
under 0.1 -0.3Mpa to distillate 3-4 hours.
Shut off steam, shut off heat source, when the oil temp cooling to below 80 ° C, shut off vacuum, release de-odor oil , the de-odor process has finished.
Until now, the product oil after de-odor is high cooking oil, there are some factories
carrying again one time fine filtering after de-odor to increase the oil qulity.
The salad oil refining process is same to the high cooking oil refining proc ess, just has
a little higher requirements in each section, for example, during alkali refining, the super amount alkali a little much, when de-coloring, the bleaching agent much, de-odor time properly longer, the temp relatively higher, add one fine filtering section.