The technology in edible oil refining process
Semi Continuous Edible Oil Refinery / Chat on line / Give me a price / Date:Aug 29, 2018
The purpose of edible oil refining process is to remove undesirable substances and components while maintaining the nutritional quality and stability of the refined oil with characteristics that consumers desire such as bland flavour and odour, clear appearance, light colour, stability to oxidation and suitability for frying. Two kinds of technology are used in edible oil refining process, alkaline refining and physical refining (steam stripping, distillative neutralisation) to removing the free fatty acids.
Major machine function in edible oil refining process:
Edible oil refining process is as below:
Crude edible oil – degumming – deacidification – decolorization – deodorization – edible oil product
Edible oil refining process
Introduction of edible oil refining process line:
Impurity removal
Impurity of extracted edible oil must be removed in order to reduce losses and increase yield of edible oil in edible oil refining process. Crude oil filter can remove impurities, control impurity of extracted edible oil under 0.2%, thus improve degumming efficiency.
Degumming
Intermittent process preheats crude edible oil to 80 ~ 85 ℃. The amount of water in crude oil bases on colloid content, and generally 3-5 times of the gum content, water temperature at 85 ~ 90 ℃ (5 ℃ higher than oil temperature). Finish water adding in 40-60min, along with 60-70r/min stirring, continue stirring 3-5min after adding water, and stand for precipitation 2-4h.
Vacuum drying
Heat degummed edible oil to 25 ~ 135 ℃, dehydrated into a vacuum dryer 20 ~ 30 min. Moisture of dehydrated oil is less than 0.1% (after degumming of crude oil via the oil contained in the 0.3% to 0.5 % of the water will affect the adsorption capacity of bleaching clay section).
Decolorization
Degumming of edible oil can remove grease in oil pigment to improve oil color, adsorption of aflatoxin and trace metals, phospholipids, other gum and other impurities. It ensures high quality of edible oil and improves oil stability.
Deodorization
Control oil temperature to 250 ~ 270 ℃ when decolorized edible oil enters into deodorizer, in direct steam injection, the free fatty acids, ketones, aldehydes and other impurities are removed from the oil, the thermal decolorized action also occurs, and the pigment composition is cleaved distilled from the oil. Deodorized vacuum (absolute pressure) controlled at 266 Pa, the deodorization time is about 2h.
Our edible oil refining machine is designed with own heat source, electric control system. User only need to prepare power, water, fuel, caustic soda, phosphoric acid and clay etc to complete the edible oil refining process.
Major machine function in edible oil refining process:
| Neutralization pot: | For acid refining, alkali refining and water washing. |
| Decolorization pot: | Bleach oil and remove pigment. |
| Deodorization pot: | Remove odor of oil(Made of stainless steel). |
| Heat conduction oil furnace: | Provide heat energy for production,the temperature can reach 280℃. |
| Vacuum pump: | Provide vacuum degree for decolorization and deodorization,up to above 755mgHg. |
| Air compressor: | Dry decolorized bleaching clay. |
| Filter press: | Filter bleaching clay. |
| Steam generator: | Provide steam for deodorization & distillation. |
Edible oil refining process is as below:
Crude edible oil – degumming – deacidification – decolorization – deodorization – edible oil product
Edible oil refining process
Impurity removal
Impurity of extracted edible oil must be removed in order to reduce losses and increase yield of edible oil in edible oil refining process. Crude oil filter can remove impurities, control impurity of extracted edible oil under 0.2%, thus improve degumming efficiency.
Degumming
Intermittent process preheats crude edible oil to 80 ~ 85 ℃. The amount of water in crude oil bases on colloid content, and generally 3-5 times of the gum content, water temperature at 85 ~ 90 ℃ (5 ℃ higher than oil temperature). Finish water adding in 40-60min, along with 60-70r/min stirring, continue stirring 3-5min after adding water, and stand for precipitation 2-4h.
Vacuum drying
Heat degummed edible oil to 25 ~ 135 ℃, dehydrated into a vacuum dryer 20 ~ 30 min. Moisture of dehydrated oil is less than 0.1% (after degumming of crude oil via the oil contained in the 0.3% to 0.5 % of the water will affect the adsorption capacity of bleaching clay section).
Decolorization
Degumming of edible oil can remove grease in oil pigment to improve oil color, adsorption of aflatoxin and trace metals, phospholipids, other gum and other impurities. It ensures high quality of edible oil and improves oil stability.
Deodorization
Control oil temperature to 250 ~ 270 ℃ when decolorized edible oil enters into deodorizer, in direct steam injection, the free fatty acids, ketones, aldehydes and other impurities are removed from the oil, the thermal decolorized action also occurs, and the pigment composition is cleaved distilled from the oil. Deodorized vacuum (absolute pressure) controlled at 266 Pa, the deodorization time is about 2h.
Our edible oil refining machine is designed with own heat source, electric control system. User only need to prepare power, water, fuel, caustic soda, phosphoric acid and clay etc to complete the edible oil refining process.
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