Refinery

Oil refining plant is the last step in cooking oil production line. The purpose of cooking oil refinery is to remove harmful impurities and useless substances from crude oil, thereby improving the storage stability of cooking oil and making the oil's smell and color comply with national standards. Oil refinery plant includes degumming, deacidification, decolorization, deodorization, dewaxing and fractionation. The specific refining process should be designed according to the characteristics of the crude oil.

Main components in crude oil: 

1) Triglyceride fatty acid ester (neutral oil) --- refined oil

2) Colloidal impurities (phospholipids)---degumming

3) Fat-soluble impurities (free fatty acids FFA) --- deacidification

4) Mechanical impurities (insoluble solid impurities) --- Filtration

5) Wax: Wax fat composed of higher fatty acids and higher fatty alcohols, which reduces the transparency of the oil and has a poor taste (crude sunflower seed oil,  crude rice bran oil, crude corn germ oil, etc.)

1. Degumming: Hydration degumming (using the hydrophilicity of phospholipids) ---α phospholipids

                          Acidification degumming (phosphoric acid, non-hydrated phospholipid) ---β phospholipid

2. Deacidification: Alkali refining deacidification (caustic soda, chemical refining) --- By-product: soap stock

                              Deacidification by distillation (steam, physical refining) --- by-product: fatty acids

3. Decolorization: Adsorption decolorization (white clay, activated carbon and other adsorption materials)

4. Deodorization: Distillation method, vacuum stripping principle (physical refining-deacidification/deodorization at the same time)

5. Dewaxing: cooling, crystallization, filtration

Refining equipment: Oil refining pot, decolorization pot/tower, deodorization pot/tower

Continuity of each process: degumming, deacidification, decolorization, deodorization

1. Intermittent refining: Each process is not continuous; suitable for small scale and needs to process different cooking oil

2. Continuous refining: Each process is carried out continuously; suitable for large scale and high production efficiency

3. Semi-continuous refining: Degumming and deacidification in batches, decolorization or deodorization continuously

GREAT provides 50-3,000TPD cooking oil refinery plant and provides professional oil refining solutions for different crude oil. Our engineering experience includes soybean oil, rapeseed oil, corn germ oil, peanut oil, sunflower seed oil, cottonseed oil, linseed oil, rice bran oil, palm oil, etc.