Animal fat refining equipment

Solutions for animal fat refining
The animal fat pre-treatment process includes animal fat shredding, cooking, oil residue separation, filtering, refining and other process.

In animal fat coarse extraction process, if handled properly, the grease products don't need further processing and can be used directly. But in practical production, due to the blood left in slaughtering process, or other reasons, the product obtained has high acid value level or there is collagen and other impurities. Therefore, these animals need to be further refined oil consumption.


Edible crude oil and fat must be refining and removing impurities, solvents and harmful elements in oils. Animal oil refining technology includes degumming and bleaching, dehydration, deacidification and deodorization.

The purpose of degumming is to remove the colloidal impurities in the crude oil, which mainly include protein, phospholipid and mocous substances. At present, We mainly use hydration degumming.

The purpose of bleaching is to remove the pigment in grease. This process adopts adsorption decolorization method, and accomplished by the addition of activated clay, or adding a small amount of activated carbon, which can adsorb pigments and some oil degradation products.

Bleached fat is continuously pumped from the input fat vessel through a recuperative heat exchanger into a drainage evaporator where water, gas and volatile matter are removed under vacuum.

The drained fat is pumped through the heat exchanger and the degassing system to the distillation apparatus. In the degassing system, under the influence of vacuum, water residues, other volatile substances and bonded gas are removed from the fat prior to entering the condensate divider.

The volatile components are partially removed in proportion to the pressure and temperature. These substances must not enter the molecular condensates.

Fatty acids and aromatics undesirably affecting the sensory aspects are removed from the fat in the condensates.

The fat is then pumped from the equalizing vessel through a recuperative heat exchanger. After cooling and filtration, the fat continues into the storage tanks.

Deodorization is to remove the dirt mixed from outside and the cleavage product of raw protein, and stink substances like aldehydes, ketones, lower acids, hyperoxide generated from oxidative rancidity of fats.

In a continuous process without the use of steam, deacidification and deodorization is carried out in one step. The process takes place on evaporation residues, i.e without the use of chemicals or live steam. The equipment works on the principle of heating the fat to a temperature of about 200°C for the shortest possible time. With such a short-term heat load with high temperature under reduced pressure, there is no undue long-term thermal load on the fat and the fat does not lose antioxidants.