Oil Refining Machine

Oil refining is to remove impurities and reach the standard of finished edible oil. The main process of palm oil refining machine process is: crude oil - degumming - neutralization - decolorization - deodorization - fractionation. Palm crude oil is hydrated and degummed by adding water, neutralized by adding alkali or deacidified by steam distillation, decolorized by adding adsorbent activated clay or activated carbon, and deodorized by high temperature and negative pressure while removing low-boiling volatiles that produce oil fume.

Crude Oil Filtration Section of Palm Oil Refining Machine

     The purchased crude oil needs to be filtered to remove suspended particles and other impurities before the following production can be carried out.

Degumming section of palm oil refining machine

Main process flow: crude oil → heat exchanger → (acid addition) mixer → intermediate tank → (alkali addition) mixer → centrifuge → (water addition) mixer → intermediate → centrifuge → refined oil This method is heated to 90 Add phosphoric acid to the crude oil at ~105 ℃ and stir vigorously for about 3 minutes, neutralize part of the phosphoric acid with dilute alkali, separate all the oil in a centrifuge, heat water and let it stand still, and use a particularly high acceleration of gravity for centrifugation. The content of phospholipids in the final degummed oil can be below 5×10 - 6 .

 

 

Neutralization section of palm oil refining machine

Neutralization and deacidification is a process that has a great impact on product quality and price. If there is a problem in the neutralization process, it will bring difficulties to the various processes after decolorization and reduce product quality and yield. There are usually two methods for neutralization, namely physical and chemical methods. In principle, the physical refining method, that is, the air stripping distillation deacidification method, should be the preferred process for oil refining. The chemical neutralization method is to use sodium hydroxide to neutralize the free fatty acids in crude oil. Deacidification produces soapstock and wastewater. However, the choice of physical refining or chemical refining mainly depends on the quality of crude oil. In view of many problems in reality, the current oil processing plants are often equipped with two sets of devices, and chemical refining is still indispensable. Add caustic soda or soda ash to the oil to neutralize the free fatty acids in the oil. This is a very important operation. Because caustic soda can not only react with fatty acids to form soapstock, but also react with neutral oils. The content of free fatty acids is about doubled. The use of soda ash in intermittent caustic refining can reduce refining consumption, but its reaction performance is weak, so it It cannot remove some impurities that only work on caustic soda, such as pigments, proteins, chlorophyll and heavy metals. Centrifugation is generally used for the separation of soapstock.

Decolorization section of palm oil refining machine

Decolorization is one of the very important processes in the oil refining process. In addition to removing the pigment in the oil, it can also reduce the content of phospholipids, peroxide value, soap content and metal ion content, thereby improving the color of the oil, Flavor and improved oxidation stability provide good conditions for further refined hydrogenation and deodorization of oils and fats. At present, the most commonly used method for oil decolorization is activated clay adsorption decolorization method, which uses clay, a substance with strong selective adsorption, to remove pigments dissolved in oil under certain conditions or disperse them in oil with colloidal particles. pigments and other impurities.