Vinprocess Technologies India Pvt Ltd

Technology

Continuous / Batch type Solvent Extraction Plant

Continuous / Batch type Solvent Extraction Plant 3D Visualization

Solvent extraction is the process of extracting oil from seeds and other oil-containing materials using a solvent. At VINPROTECH, we specialize in manufacturing and exporting solvent extraction plants. Our plants utilize food-grade n-Hexane solvent, derived from petroleum, ensuring the highest quality extraction.

Renowned for our well-established design, our solvent extraction plants are cost-effective, robust, and user-friendly. They offer flexibility for seamless transition of process materials, all while integrating advanced safety features.

The final product of our solvent extraction plants is low-temperature oil, prized for its excellent color and high bleach-ability properties. This makes it the perfect choice for subsequent refining processes. Trust VINPROTECH for top-tier solvent extraction solutions The solvent extraction process involves three main stages

1- Preparatory section

The preparatory phase in a solvent extraction plant is crucial for enhancing extraction efficiency. It encompasses receiving raw materials, eliminating impurities through cleaning, reducing particle size to boost surface area, and potentially applying thermal treatments like cooking or steaming to aid oil extraction. Mechanical pressing might also be utilized when necessary. The objective is to prime the material for extraction by loosening oil from its cellular structure, thereby optimizing yield while upholding product quality and safety standards.

2- Continuous / Batch type Solvent Extraction Plant

Extractor

In Extractor, Oil is extracted (yielded) from oil bearing materials (Rice bran, oilseed flakes, oil cakes, and herbs). While the feed Material moves on perforated articulated band conveyer from feed point to discharge point. Hexane (solvent) is sprayed on the material. The hexane while passing through the material and draining to the hexane collective hopper, extracts oil from material. Here after the hexane and oil mixture is called as miscella. From miscella (oil and Hexane) are separated in distillation section. The material by the time it reaches the discharge hopper of the extractor, will be totally deoiled.

Desolventising Toaster/Drier

Even though the oil is extracted from material, the discharged material from extractor contains 30-35% hexane. To leave large quantity of hexane in material is not safe and economical (hexane is a highly inflammable liquid). So the hexane from deoiled material is removed and recovered. The de oiled material is heated up to 105-1070C in vertical desolventising toaster or horizontal cylindrical dryers. In desolventiser the material is heated by both jacket steam and open steam. The desolventised material is then sent to bag filling section, where the material is cooled to room temperature and filled in bags, and stitched.

Distillation Section

As stated earlier, hexane after extraction of oil is called ‘miscella’ ( mixture of oil + hexane). In distillation section the miscella is separated. The distillation is carried under vacuum to protect oil color and bleachability. The distillation under vacuum reduces the boiling point of hexane. Since the distillation is done at lower temperature, the steam consumption to heat miscella is reduced. The distillation unit consists of one Economizer with separator, one Heater with separator and one set of stripping column ( 3 piece design). In the 1st Economizer miscella is heated up to 55-600C and sent to separator. Here a low quantity of solvent from miscella is evaporated (40%). There after in the heater the miscella is heated to 75-850C and sent to the separator. Here most of the quantity of solvent from miscella is evaporated (97%). Finally in the stripping column the last traces of hexane from oil is removed in the support with high vacuum along with low temperature. Now the final oil from stripping column is collected by vacuum cooler and after cooling down the temperature of the final oil and it is sent to semi storage tank and from there to Bulk oil storage tank.

Condensation Section

In condensation section the solvent vapors which are formed in meal desolventising section and distillation section are condensed as liquid in condensers. Usually the condensers are shell and tube floating head surface condensers. Cold water is circulated in tubes and solvent vapors in shell side. The condensed hexane from condensers is collected in hexane / water separator. After separating water from hexane the hexane is pumped to extractor again to extract oil from material.

Recuperation Section

The un condensed hexane vapors from condensers are sent to recuperation section and recovered. All un condensed hexane vapors (vent gases) are diverted to recuperation section, here first the uncondensed hexane traces are washed with cold water in vapor cooler to reduce vent temperature and dissolve air in spraying water. Later cold mineral oil is sprayed on vent gases where the hexane traces are dissolved in mineral oil. The absorbed hexane vapors is removed from mineral oil in stripper and then condensed. The stripped mineral oil is cooled and re sprayed.

3- Meal bagging section

After the extraction and desolventization process, the resulting meal is moved to the meal conditioning area. This is where moisture is introduced, and the temperature of the de-oiled cake is lowered from 100°C to 45°C using a cooler. This cooling step is crucial for stabilizing the meal and making it suitable for subsequent processing or storage. Once the desired temperature and moisture levels are reached, the final product is packaged into small bags using bagging conveyors. This packaging step ensures that the product is conveniently prepared for distribution or storage, ready for shipment.

Continuous / Batch type Solvent Extraction Plant

Continuous / Batch type Solvent Extraction Plant

Continuous / Batch type Solvent Extraction Plant 3D Visualization

1- Preparatory section

2- Continuous / Batch type Solvent Extraction Plant

Extractor

Desolventising Toaster/Drier

Distillation Section

Condensation Section

Recuperation Section

3- Meal bagging section

Solvent extraction consists of following three stages