Pretreatment/Press Process

Oilseed pretreatment & pressing machines photo

Oil mill machinery pretreatment/press process
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Oilseed pretreatment & pressing machines


Our company is professional in manufacturing cooking oil plant with different oilseed, including pretreatment/prepressing plant, solvent extraction plant and oil refining plant.Pretreatment/prepressing plant is necessary for big capacity oil factory, which influences the following process.
 
Our common oilseeds are groundnut/peanut,soybean,sunflower seed,sesame,cottonseed, rice bran,corn germ,etc.
 common oilseed
Common oilseed

The following is different oilseed oil content:

Raw material Oil content
Peanut 44-55%
Camellia 58-60%
Castor seed 50-70%
Soybean 18-21%
Cotton seed 33-40%
Rapeseed 33-40%
Sesame seed 45-50%
Sunflower seed 40-50%
Rice bran 18-20%
Safflower seed 29-45%
Corn embryo/germ 30-40%
Walnut 40-65%
Flaxseed/Linseed 29-44%
Palm seed 50-55%
Coconut 35-45%


Oilseed pretreatment process includes the process section of cleaning, stones removal, magnetic selection, crushing, softening, flaking, drying and so on. Different oilseeds have different pretreatment process, they need different pretreatment machines.

Oilseed pretreatment is important section to remove impurity, regulate moisture and temperature, break oilseeds into small particles to change oilseed molecular structure,etc. Pretreatment standard is important for the following oilseeds solvent extraction process , which influences final oil quality.


main machines in pretreatment workshop
Main machines in pretreatment workshop

 
The followings are every pretreatment section for different oilseeds.

1.Cleaning section: Cleaning is the beginning of oilseeds pretreatment, which can influence the final oil quality and machine life time directly.  This section usually includes cleaing vibrating sieve,   gravity stoner, magnetic selection,etc. All oilseeds need this step to clean raw material and remove impurities.



cleaning section machine

Cleaning section machine
 
2. Husking/dehulling/shelling section : Husking/dehulling/shelling machine is to seperate shells from nuts. Some oilseeds like peanut/groundnut, sunflower seed,cotton seed,palm kernel have hard shells above nuts, they need shelling first. If pressing with shell, the residue oil rate is high, and final oil quality is not good. This section is for oilseed with shell.
Different raw material need different shelling machine, the following is peanut/groundnut shelling machine:


peanut shelling machine
Peanut shelling machine

3. Drying: Reducing oilseed moisture to proper moisture is drying. Oil seeds might be harvested in rainy season with a high moisture, which leads drying to be essential for storage and further processes. This machine is uncessary machine for every oilseeds.

Plate dryer
Dryer

4. Crushing: Mechanical size reduction process is also named crushing. For big-size or hard oilseeds, crushing reduces its size to benefit flaking, while for prepressed cake, crushing turns cake to proper size and creats better oil yeild for second press or solvent extraction. Crushing is always necessary for soybean, peanut, palm kernel, etc.

crusher
Crusher

5. Softening: Softening adjusts moisture and temperature of oil seeds, softens and increases plasticity of oil seeds. For low oil content oil seeds (soybean, rape seed/canola, cotton seeds, etc), softenning is an essential process for better flaking effect. For example, oil content of soybean is 18-22%, while soybean is hard, low-moisture and low-temperature, flaking will bring plenty of powders without softenning. However, this needs to be stressed that whether softenning is needed still depends on the properties of oil seeds.

Softening pot
Softening pot

6. Flaking: Flaking presses oil seeds from granulous to laminar, which brokes cell tissue of oil seeds and creats beneficial condition for cooking. Flaking also makes oil flows out smoothly when pressing or solvent extraction. Flaking roll is common for soybean.

flaking roll
Flaking roll


7. Puffing: Puffing turns oil seeds(cracked, flaked, or whole seed) to polyporous matters, which improves solvent permeability in extraction and increases leaching rate. Puffing is mainly for rice bran.

puffing
Puffing/Bulking  machine

 
8. Cooking: Cooking is to wet, heat, steam and to cook flakes to change the internal structure of flakes, including destorying cells, protein solidification and denaturation, etc. All these changes makes oil easy to isolate and also enhance crude oil quality. Cooking pot can be used for processing groundnut/peanut, canola seed,cottonseed, sunflower seed,etc.

cooker
Cooker

9. Pressing/prepressing: Pressing/prepressing is to press oil from oil seeds or cakes. In general, there are several oil press machine for this step. Pressing section is mainly for processing high oil content, as groundnut/peanut,sunflower seed, canola seed, cottonseed, corn germ etc.


oil seeds press machine   oil seeds press machine
 
Press machine

 
The above details are all pretreatment sections and machines, we can advise you proper machine according to your capacity and oilseed. Preteatment process is important for the following process, and influences final oil quality.
We can design prepressing/pretreament workshop according to your requirements. We also manufacture solvent extraction plant and oil refining plant. Please look through oil extraction process and oil refining process for more details if you need. If you are interested in oil production or want to know more about prepressing/pretreament workshop, please feel free to contact us.
We also have home use oil press machine for small capacity.
Home use oil press machine also name automatic screw oil press machine, it has three kinds, screw press machine, screw press machine with filters and hydraulic press machine.

home use oil press machine
Home use oil press machine
 
Advantages of home use oil press machine:
1. Save energy—it can save 40% electronic compared with the same machine in the machine.
2. Save both labor and money—it just need 1-2 people to operate the machine.
3. Wide applying range—this oil extractor machine can press various kinds of oil crops, such as peanut, soybean, flax, rapeseed, sunflower seeds, cotton seed.
4. The quality of oil is pure.
5. Occupied workshop area is small.
6. Mechanical and electrical are integral.
7. High hardness and strength, good abrasion resistance and long using life.
8. It can use in different season and different environment.


The main models of home use oil press machine:
Type 6YL-60 6YL-70 6YL-80 6YL-100 6YL-120 6YL-150
Screw diameter  (mm)  55 65 80 100 120 150
Screw speed (r/min)  52 48 63 43 36 33-42
Power (main frame) (KW)  2.2 3 5.5 7.5 11 15
Vacuum power (KW)  0.55 0.75 0.55 0.75 0.75 4
Heater (KW)  0.9  1.8  3 3.5 4 4.5
Handling capacity (kg/h)  30-60  50-80 80-150 150-250 250-350 300-450
Weight (kg)  220 280 500 850 1300 1950
Size (mm)  1200x780x1100 1400x860x1260 1650x1500x1700 1700x1600x1750 1800x1700x1750 2380x1850x2000


Please feel free to contact us if you need our small home use screw press machine. Oilseed pretreatment process includes the process section of cleaning, stones removal, magnetic selection, crushing, softening, flaking, drying and so on. Different oilseeds have different pretreatment process, they need different pretreatment machines.

Oilseed pretreatment is important section to remove impurity, regulate moisture and temperature, break oilseeds into small particles to change oilseed molecular structure,etc. Pretreatment standard is important for the following oilseeds solvent extraction process , which influences final oil quality.

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