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Oil refinery

The crude vegetable oil from above mentioned two ways of extracting, oil pressing and/or solvent extraction, will be pumped into oil refinery unit to produce cooking oil at various grades. The main equipment of oil refinery is various kinds of pot and tanks carrying on different tasks with additives. These tasks may include sedimentation/filtering, neutralization (removing free fatty acid), degumming, decolorization (bleaching), deodorization, dewax etc. Different combination of steps and the treating degree of each step result in different grade cooking oil and salad oil.

Oil refinery

Neutralizing process for oil refinery

There are 2 methods according to adding different quantity alikali and different oil temperature.
One is weak alkali(10-16 Be) and high oil temperature (75 degrees), who is only used for weak colour and low acidity; The other is low temperature(20 degrees orso ) and density alkali(20 Be orso), whose is used more.

Low temperature(20 degrees or so ) and density alkali(20 Be or so)
Adjust the tempetature of oil to 20-30degrees, then put alkali water of 20-30 Be into oil within 5-10 mins, mixing and rise temperate for 20- 60 mins. When the temperature of oil rise to 60 degrees orso, to stop adding heats and immobility for 6-8 hrs to out of the soap particle.
Weak alkali(10-16 Be) and high oil temperature (75 degrees) (Omission)
Washing by water for oil refinery

After be out of the soap paticle from the under of refiner, then continustly adding the heats to 90degrees, then add some hot water to washing the oil, note the temperature of water is higher for 5-10degrees than oil temperature. Then mixing them for 5 mins, then immobility for 4 hrs, put off the soap water, so for 2-3 times which is confirmed as the oil quality.

Oil washed is added heat to 105 degrees orso, to mix then dehydrate for 1 hour, also directly is pumped into decolorizer vessel for dry for 30 mins in the vacuum condition.

Decolorizer process for oil refinery

Pump the oil netralized into decolorizer vessel, samely mixing to rise its temperature to 90 degrees, then mixing for 30 mins, to reduce water to 0.1%, then put a little clay (decoloring media) 2-4 % of total oil, mixing for 30 mins, to reduce the temperature to 70 degrees, then filte the clay with oil filter, to get the oil decolorized.

Deodorizer process for oil refinery

Pump the oil decolorized into deodorizer vessel in 755mmHg of vacuum, 240 degrees -260degrees, to distillate for 4hrs wit steams. Then turn off the steams to open the cooler to reduce the temperature to 40-80 degrees, and then check a little oil, if ok to pack it.

De-waxing/winterization process for oil refinery

The standard Bleached Oil enters into the Crystallizing Tanks after heat exchange and cooling. The oil crystallizes and the crystal grows at design temperature. Crystallization speed should be slow and even and the oil should be agitated at the same time. The crystallized oil is sent to the Filter by screw pump to remove wax. Wax is sent to the Wax Tank and then sent to the Wax Storage Tank. Adopt Refrigerating Machine for refrigeration.

This technology adopts mechanical method to dewaxing from the sunflower oil. It is easily operating and the technology is mastered easily, small occupy area, also its cost is lower.

Equipment process workshop