Oil Pretreament&Pressing
Section Introduction:Pre-treatment section 1. Metering process: With special equipment, the stable measuring scale is used to regulate the flow and measure total production. Moreover, it can achieve accumulated measurement, transient measurement and cost accounting, with accurate measurement and high precision.
Oil Pretreament&Pressing
1.Oil Seed Cleaning Section
Oilseed cleaning section can remove all contained impurities in oilseeds. Oilseed cleaning requires strict control of impurity content in oilseeds, and oil content in waste after cleaning process. And different kinds of oil seeds will adop different equipments. More informations you want please leave us a message.
Oilseeds limited impurity content after cleaning up is as below:
Cold oil pressing soybean: < 0.05
High temperature oil pressing soybean: < 0.1
Sunflower kernels (with shell) : <10
Sesame: < 0.1
Peanuts: < 0.1
Rapeseed: < 0.5
Rice bran: < 0.05
2.Oilseed Crushing section
Crushing section uses crusher to crush oilseeds into small broken particles, which is very important process during oil press machine. The purpose of crushing is to change big raw oilseeds materials into particles for convenience of further step flaking.
This process reduces larger seeds to a smaller particle size prior to subsequent rolling and conditioning. Equipment used for the operation basically falls into two categories depending on the material being processed. Swing or fixed hammer grinders are used for hard seeds like palm kernel and copra which require a hammer mill pulverising action.
Breaker rolls can be arranged in vertical pairs with spiral flutes on their faces. The number of rolls and size of corrugations depend on the size of pieces to be broken and the fineness required in the broken material.
3.Oilseed Flaking Section
Oilseeds flaking section utilizes mechanical action to press oilseeds into tablets or slice. Flaking can destroy tissue of oilseeds and creates favorable conditions for oilseeds steaming and roasting in oil pressing process. Oilseeds flaking make efficient separation of oil from oil pressing machine or oil extraction process.
The flaking section is the process of making oil pellets into slice by mechanical principle. It can destroy cell tissue of oil seed, and create favorable cooking conditions so that oil can be successfully separated when oil pressing or extraction.
The flaking cakes requires thin, uniform surface, less powder, no reveal of oil. The embryo thickness for oil press machine is as below:
Soybean: less than 0.3mm
Cottonseed: less than 0.4mm
Peanuts: less than 0.5mm
4.Oil Pretreatment Drying Section
Oilseed drying section can reduce moisture of oilseeds to suitable moisture through dehydration process. Sometimes when oilseeds harvest is during the rainy season with high moisture content, oilseeds drying process is necessary for further oil pressing.
Drying section can preheat oilseeds, wherein part of water can be vaporized, oilseeds moisture can gradually vaporize and escape into atmosphere. Drying device uses hot air drying apparatus for drying and achieves fast dehydration of oilseeds.
Drying equipment during oil press machine processing line contains rotary dryer, vibrating fluid dryer and flat layer.
5.Oilseed Extrusion Section
Modern expanding technology greatly improves oil yield of oil seeds. After pretreatment process, some oil seeds are of large-sized powder and oil impassability, the extraction process will be hard with high solvent consumption and residual oil. Expanding technology is adopted in order to solve the problem. After expansion, the material becomes larger, more permeable, and the inner oil channel is fully opened, which makes the extraction much easier. Under the same conditions, residual oil and solvent consumption will decrease greatly, and the yield will improve 50-80%. Expansion can also passivate antinutritional factors in soybean—urease, improve palatability and nutritive value. Expanding technology is an important means of energy conservation in modern oil production industry.