Rapeseed oil refinery plant is very important equipment in the rapeseed oil production line, it refers to remove the harmful impurity from the crude rapeseed oil. After rapeseed oil refinery plant is thinner without FFA, colorless and odorless, and also, it is good for human health and easy to storage.
Continuous Rapeseed Oil Refinery Plant Process:
Crude Rapeseed oil → degumming → deacidification(Alkali refining) → decoloration → deodorization → refined rapeseed oil
1) Degumming and deacidification refining
Degumming is to remove the phospholipids in the crude rapeseed oil. The crude oil is preheated and phosphoric acid is added.
2) Alkali refining
Alkali refining is to remove the free fatty acids in the crude oil. Alkali acid is added to reacts with free fatty acid. When the soapstocks precipitate obviously, stop stirring and settle for several hours. Then remove the soapstocks. Preheat the clean oil and add hot saline-alkaline water. Settle and discharge the wastewater. Wash with hot water for several times.
3) Decolorization
Decolorization is to remove the pigments in the canola oil. Pump the oil into the decolorization tank and dehydrate under vacuum. Add bleaching clay and stir for 20 minutes. Then the oil is cooled and filtered.
4) Deodorization
Deodorization is to remove the odor substances in the oil. The decolorized oil is pumped into the deodorization tank for vacuum deodorization by steam distillation. The oil is then cooled and filtered.
1) After heat exchanging, decolored crude oil will be heated to a required temperature and delivered to deodorizing tower.
2) When deodorizing, crude oil is flowing from the top of deodorizing tower layer by layer, on every layer crude oil will be contacted with direct steam and be removed bad smells under high temperature vacuum conditions.
3) Gas will be discharged from top and be caught by fatty acid catcher. Non-condensable gases is drew off by vacuum pump. Part of caught fatty acid continues cycling to catch more impurities, other part is pumped to storage.
4) At the bottom of deodorizing tower of rapeseed oil refining machine, there is a level control system to control liquid level.
5) After oil-oil heat exchanging, crude oil will be cooled down to safe temperature, and filtered to be edible oil.