Peanut oil production process mainly includes peanut oil press process, peanut oil extraction process, and refining peanut oil production process. The following is an introduction to peanut oil refining production process.
Crude peanut oil → degumming → deacidification → decolorization → deodorization → refineried oil
Peanut oil refining machine
Refined peanut oil production process:
1, coarse filter
The leached peanut oil in the tank was filtered and slag removed using a 120 mesh/inch coarse oil filter.
2, warming up
The crude leachate after rough filtration is heated up to about 85°C using a plate heat exchanger.
3, acid refining degumming
Adding a concentration of 85% food grade phosphoric acid, 0.05 to 0.1% oil, effectively reduces the content of colloidal and trace metals in peanut oil, and at the same time converts chlorophyll into light pheophytin. The reaction time is approximately 25-30. minute.
4, alkaline deacidification
Bases are used to neutralize free fatty acids and free fatty acids are generated soapstock. Soap foot has a good adsorption, can absorb a considerable amount of pigments, proteins, phospholipids and other impurities.
5, the first centrifugal separation
The first centrifuge separates the oil from the soap, the oil enters the second centrifuge in a light phase, and the soapy foot enters the soap bowl as a heavy phase.
6, the second centrifugal separation
The first centrifuge oil is added to the soft water, mixed by a mixing pump, and then separated into a second centrifuge oil and water. The oil is light phase and enters the drying process.
Neutral oil was dried at a vacuum degree ≥0.08Mpa and a temperature of about 103°C, and the time was about 10 minutes.
After the dried neutral oil is added to citric acid, the heat exchange oil (110°C-115°C) of the heat exchanger enters the decolorization tower, the decolorization vacuum degree is 0.09Mpa, and the reaction time is 30-45 minutes.
The oil/white clay mixture is pumped into the filter through the decolorization tower for filtration, and the filtered oil is passed into the filtrate tank.
10, fine filter
The filter is used to remove the unfiltered impurities from the previous process and then enter the next process.
By using the difference in the volatility of the odor substances and triglycerides in the oil and fat, the odor substances are removed by steam distillation under high temperature and high vacuum conditions.
12, fine filter
After being filtered by a filter, the plate heat exchanger is cooled by using the cooling tower water.