Oilseed processing generally refers to the process of extracting oil from oil seeds. The whole processing begins with oilseed harvesting, and ends with oil exaction. The oilseeds pretreatment and prepress plant include cleaning section, breaking section, flaking section, softening section, cooking section and oil press section.

Different vegetable oil has different process requirements in the oil production process. Therefore, the oil should be subjected to a series of treatments before oil production, so that the oil can achieve the best oil production quality to meet the requirements of different oil production processes.

Cleaning: Remove impurities such as leaves, sticks, stones, sand, dirt, spoiled seeds and metal contaminants. This process is commonly referred to cleaning and scalping equipment including sieve, destoner, peeling machine, magnetic devices, and beltconveyor etc.

 Dehulling: Most oilseeds need to remove the abrasive shells before oil extracting, since the oil content of shells and hulls is less than 1%. Besides, shelling can not only improve the capacity of oil extraction equipment, increases the efficiency of oil production, but also can reduce wear of oil expeller. Dehuller is commonly used in this process.

 Crushing & Flaking: Most oilseeds require size reduction prior to oil extraction. Crusher and flaker are used in this process. Some small seeds such as corn germ, rapeseed and canola don’t need to be cracked.

 Cooking: Heating the seed is an option, but not necessary. It can increases efficiency of extraction and protein availability.

 Extruding/Puffing (optional):Through extrusion (puffing) by means of expander (extruder), the oilseeds materials will be expanded because of sudden pressure-relief, Meanwhile steam in the material is evaporated all of a sudden, so the material become microporous structure and expanded to irregular particles.

pretreatment includes Seed Cleaning & Weighing, Cracking & Dehulling, Flaking, Cooking, Pre-Pressing, Oil Residue Separation.