Introduction to oilseed cleaning
Pretreatment process of oilseed
The pretreatment process of oilseed includes process such as cleaning, delinting, hulling, drying, crushing, softening, flaking, and cooking.
Oilseed cleaning
The first step of oilseed pretreatment is oilseed cleaning,the oil will be mixed with some impurities such as sand, soil, stems and leaves and ironware in the process of harvesting, drying, transportation and storage.If it is not removed before production, it is very unfavorable to the production process. The impurities contained in the oil can be divided into three categories: inorganic impurities, organic impurities and oil-containing impurities.
The pretreatment process of oilseed includes process such as cleaning, delinting, hulling, drying, crushing, softening, flaking, and cooking.
Oilseed cleaning
The first step of oilseed pretreatment is oilseed cleaning,the oil will be mixed with some impurities such as sand, soil, stems and leaves and ironware in the process of harvesting, drying, transportation and storage.If it is not removed before production, it is very unfavorable to the production process. The impurities contained in the oil can be divided into three categories: inorganic impurities, organic impurities and oil-containing impurities.
1. The limit of impurities in the oilseed after cleaning (%)
Cold pressed soybeans <0.05
Hot pressed soybeans <0.1
Sunflower kernels (including hulls) <10
Sesame seeds <0.1
Peanut kernels <0.1
Rapeseed <0.5
Rice bran < 0.05
2. Limitation of oil content in scraps after cleaning
①The oil content in the scraps of soybeans is less than or equal to 0.5%, and the inspection sieve specifications: sieve 4.72 mesh/cm, metal wire diameter: 0.55 mm. diameter of round hole screen: 1.70 mm.
② The oil content in sunflower shells (including kernels) is ≤1.0, inspection sieve specifications: metal wire diameter 0.55 mm, diameter of round hole screen:1.70 mm.
③The oil content in the scraps of sesame seeds is less than or equal to 1.5, and the inspection sieve specifications: screen 11.81 mesh/cm, metal wire diameter:0.28 mm, diameter of round hole screen:0.70 mm.
④The oil content in the scraps of the cottonseed is ≤0.5. The inspection sieve specifications: sieve 5.51 mesh/cm, metal wire diameter:0.50 mm, diameter of round hole screen:1.40 mm.
⑤The oil content in the scraps of the rapeseed is ≤1.5. The inspection sieve specifications: screen 11.81 mesh/cm, wire diameter 0.28 mm, diameter of round hole screen: 0.70 mm.
