Oilseeds pretreatment is an important link in oil processing. The following are some precautions:

Raw material cleaning

Thorough impurity removal: Oilseeds often contain impurities, such as mud, sand, metal, etc., which will affect the normal operation of subsequent processing equipment and may also reduce the quality of oilseeds, and must be completely removed by screening and magnetic separation.

Prevent oilseeds from being damaged: During the cleaning process, it is necessary to avoid excessive crushing or squeezing of oilseeds, so as not to damage the integrity of oilseeds, increase the fineness of oilseeds, and lead to problems such as oilseeds spill and blockage in subsequent processing.

Oilseeds crushing

Control the degree of crushing: The degree of crushing should be moderate, too fine will increase the degree of powder, resulting in poor air permeability of the blank during steaming and cooking, which will affect the extraction of oilseeds; Too thick is not conducive to the subsequent rolling and steaming, and the size of crushed oilseeds particles should generally meet the technological requirements.

Uniform crushing: Ensure uniform crushing of oilseeds, so that all parts of oilseeds can be evenly heated and absorb moisture in subsequent processing, which is beneficial to improve oilseeds yield and oilseeds quality.

Slab rolling

Control the thickness of the blank: The thickness of the blank directly affects the extraction effect of oilseeds, and generally requires the blank to be thin and uniform. The thickness is too large, and the oilseeds are difficult to seep out; If the thickness is too small, the blank will be easily broken and the powder degree will increase.

Prevention of oxidation: In the process of billet rolling, the contact area between oilseeds and air increases, which is prone to oxidation reaction. The storage time after rolling should be shortened as far as possible to avoid long-term exposure of oilseeds to air, and protective measures such as nitrogen filling can be taken when necessary.

Cooking

Temperature and moisture control: Strictly control the cooking temperature and moisture, too high temperature will make the oilseeds burnt and affect the oilseeds quality; Too low temperature is not conducive to protein denaturation and oilseeds coagulation. Too high moisture will cause the blank to be sticky and affect the air permeability; If the water content is too low, the blank will be fragile, which will also affect the oilseeds output effect.

Uniform steaming and cooking: Ensure that the oilseed is heated evenly in the cooking equipment, avoid local overheating or supercooling, and make the whole blank reach a suitable processing state.

Other aspects

Equipment maintenance: All kinds of equipment used in the pretreatment process, such as screening machine, crusher, blank rolling machine, steam pan, etc., should be maintained regularly to ensure the normal operation of the equipment and the stable pretreatment effect.

Hygiene management: Keep the pretreatment workshop clean and hygienic to prevent oilseeds pollution. Clean up the impurities in time to prevent them from rotting and deteriorating, which will affect the quality of oilseeds.

The above are the precautions for oilseed pretreatment, I hope it will help you!