Soybean Solvent Extraction Plant
GOYUM GROUP is a trusted name in the field of Soybean Solvent Extraction Plant Manufacturing & Exporting on Turnkey Basis based in Ludhiana, ( Punjab ) India. We provide end-to-end solutions for our customers i.e. Plant Design, Machines & Equipment Manufacturing, Supplying, Installation & Commissioning and After-Sale Support.
Soybean or soya bean is a legume originated from East Asia and moved to South and North America.
It has numerous applications and edible uses. Soya is used to produce edible protein, soya milk, soy sauce, soya bean oil and many other applications. Soya bean is the main ingredient of and resource of protein in feed milling industry. Texturized vegetable protein produced from soya is main dietary supplement and meat substitute. The largest producer of soya beans is brazil, followed by USA, Argentina, China, India and Paraguay.
Althrough earlier soya beans mainly used for protein source it contains 18% to 20% oil. Due to the specific qualities like Unsaturation and highly suitable cooking oil, salad oil and in the production of mayonnaise.
Sunflower Seed Oil Extraction
Soya bean Oil Extraction by Solvent extraction method is most popular and commercially viable economic solution and accepted world wide.
Commercial standards of Soya beans
| S.N | Description | Specifications |
|---|---|---|
| 1 | Foreign Matter / Impurities / Sand Silica | 2% Max |
| 2 | Damaged Seeds | 2% Max |
| 3 | Moisture | 10% – 12% |
| 4 | Oil | 18% – 20% |
| 5 | Protein | 34% – 38% |
The Standard process of Solvent extraction of Soya beans will be done with the following steps:
Soybean Preparation
Cleaning
The soya beans contain some legume shells, impurities, sand and stones etc. These materials are followed during the harvest at the time of collection. These impurities are to be removed for smooth Operation of the plant. A rotary drum sieve in combination with vibratory cleaner followed by aspiration channel will be used to remove major impurities.
Magnetic Separation
The incoming soya may contain some kind of magnetic items during the processing of the harvest like nut bolts or any other magnetic impurities are separated from soya with help of magnetic drum.
De Stoning
The soya beans may contain the same size of stones as that of soya beans, it will be difficult to remove the stones through normal seed cleaning operations. These stones will be separated gravity separator under vacuum will be separated with the help of aspiration using density as the factor. The destoner removes complete stones of same size of soya beans. This will help the machines to reduce the maintenance cost.
Cracking
Soya beans are very hard beans and tough process to obtain oil directly. To make it facilitate the beans are passed through the cracker where the soya beans break into 2 to 8 pieces of size. Chilled cast iron rolls with grooves suitable to crack soya beans will be used with Brinell Hardness 450 – 500.
Partial De Hulling
The cracked beans could be directly used for conditioning to further processing. However, loosely bound hulls will be removed. As such the Soya beans contains hulls of more than 6% with a Fiber content up to 5% to 6%. With the help of Partial Dehulling process some quantity of hulls will be removed making it to 2.5% to 3% fiber through which the proportionate protein content will be increased. This step will be used to produce special de-oiled meal than normal de-oiled meal with a higher protein to 47.5% to 48%.
Conditioning / Cooking
As explained soya beans are very hard beans required to condition to make it soften. A vertical stack cooker or horizontal rotary cookers are used to condition the soya beans by heating with jacketed and live steam to 65°C to 70°C and increasing the moisture to 11% to 12%. This process will soften the cracked beans make it suitable to good flaking.
Flaking
The cooked and conditioned cracked soya beans passed through a pair of chilled cast iron rolls fixing specific gap of 0.2mm to 0.35mm to rupture the oil cells where the it will come on the surface and then used to extract with use of solvent. The much thinner flakes will be come power and thicker flakes will not allow to penetrate the solvent into the flakes and in turn leaving more oil in the Meal. Hence it is required to maintain the optimum flake thickness to achieve best recovery of oil.
Expander
The Solvent Extraction Plant of lower capacities can be processed with flakes upto 100 to 150 tons per day. The Bigger capacities are to handle with expanded collets as the density of the flakes are very low. The density of the collets is with 35% more than the flakes. The flakes will be conditioned in horizontal flake conditioner allowed to expander where the flakes are compressed and expanded to increase the bulk density and also porosity to enhance solvent percolation through which higher yield of oil and capacity enhancement occurs making the plant more efficient.
Collet Drier Cooler
The collets discharged from expander are at 105°C with 12% to 13% moisture not compatible for solvent extraction process. These collets are dried and cooled with help of hot and cold air radiators make them suitable for extraction process of 55°C and below 10% Moisture. The aspiration channels remove the excess moisture sent to atmosphere during the process of aspiration the fines are collected and re cycled to the process.
From here the Collets will be transferred to Solvent Extraction Process.
Soya Solvent Extraction Process
Prepared Soya flakes/soya collets from preparatory section is carried by Redler Conveyor and fed to Extractor Either through rotary valve or Plug O Seal to extractor feed hopper incorporated with high and low level arrangement to ensure proper level of material filled in the Hope and seal for the system.
The material through the intake hopper moves on the endless band conveyor chain of moving deep bed extractor and the Hexane is sprayed counter currently over the moving bed material. The solvent percolates n penetrates through the bed and dissolves oil with it.
The solvent oil mixture is called as Miscella. Miscella from last hoper will be transferred to miscella holding tank through miscella filter or hydro cyclones fixed above Extractor. The de oiled seed material with solvent is discharged from extractor discharge hopper and is transferred to desolventisor toaster through leak proof sealed solvent tight conveyor.
Meal Conditioning and Bagging
The Soya meal obtained from the DT discharged at 110°C will be cooled to 10°C above the ambient temperature. This cooled meal contains some quantity of lumps around 10% to 15% based on the operation and quality of steam. These lumps are sieved out and grinded to the specific size of sieve. This is the final product which called de oiled soya meal. This will be bagged in 50 to 75 kg through an automatic bagging machine.
The bags are stacked and will sold to the end user either for poultry feed or another feed manufacturer etc.
The Specifications of Solvent Extracted Soya Bean Oil
| MIV | 0.2% |
| Impurities | 0.1% |
| Peroxide Value ( Based on seed quality) |
5 – 10 meq/kg |
| Un-saponifiable | 1.5% |
| Phosphatides | 800-1000 ppm |
| FFA( Based on seed quality) | 2% |
The Specifications of De Oiled Soya bean Meal:
| Residual oil in de-oiled cake | 1% maximum |
| Moisture in de-oiled cake | 10 – 12.5% |
| @ bagging | 5 – 10 meq/kg |
| Protein content in de-oiled cake | 43 – 44% |
| Hexane ppm in de-oiled cake | 300 – 400 |
| (After Meal Cooling) | 800-1000 ppm |
| Crude fiber in de-oiled cake ( Based on seed quality) |
5 – 6% |
Soybean Solvent Extraction Plant Process
- Meal Desolventization
- Miscella Distillation System
- Condensation and Solvent Recovery
- Recuperation (Absorption and Desorption) Unit
