Hexane is the chosen solvent for edible oil extraction from oilseeds and nuts. Solvent extraction is a dependable and effective method. Solvent extraction is a common stage in industrial oil processing for edible oil, which may or may not be followed by pressing. Processes based on hexane have been used in industry for a long time. In contrast to the 60% to 70% oil yield by mechanical expeller pressing, it is possible to produce oil yields of over 95% with a solvent recovery of over 95% for such methods. With the exception of a mere 0.5 percent of leftover oil, the solvent extraction method consumes less energy and requires less upkeep. It is the main method for separating massive amounts of oil from the protein pellets since it is comparatively effective and dependable.
The solvent extraction plant uses a counter-current flow of miscella at a predetermined operating temperature for a predetermined extraction period to extract the majority of the oil from the prepared raw material. A miscella feed flow rate design and a specially constructed wedge wire filter make optimal oil recovery possible.
After the moisture is eliminated, the solvent is recirculated. Miscella is fed to the distillation section, which includes an evaporator, heater, and vapor condensing unit, after hydro clones are used to separate the fines. Miscella is sent from the economizer to the evaporator where it is first heated and some of the solvents are recovered by using heat from vapors from the desolventizing unit.
With a straightforward and small design that uses less hexane, steam, and power, H K Solvent Extraction has three steam ejectors and three pressure-lowering stations that are essential for minimizing steam and power usage.
There are 8 steps in the fundamental oil extraction process
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- Process Preparatory
- Cleaning
- Toasting/ Cooking
- Pelleting
- Cooling
- Desolventizing
- Distillation
- Solvent Recovery
Our primary extraction is finished by a bed adjustable continuous H K extractor that has a bed limiting plate to adjust the bed height. Spraying is done at hood-type spray, which determines the maximum area of a material that is moving on a fixed cadre frame moving on a wire mesh for the best distribution of miscella. In addition, there is a high-quality cleaning system and a scrapper plate at the end of the extractor to clean the material that has become jammed.
The most up-to-date desolventizing toaster available today has a high thickness and meets the requirements for low oil residue, hexane content, and reduced urea activities for soybean in the extracted pellets. Hexane is prevented from coming into contact with the atmosphere by a hermetic plug, seal, and solvent-tight conveyor at the extractor’s discharge. Hexane is sprayed in an extractor using a specific device called a solvent heater, which raises the solvent’s temperature. This device is crucial for oil extraction.
Our distillation section’s core of the solvent extraction plant, which has a high hexane recovery rate, begins with the economizer, which takes the miscella from the miscella tanks. After passing through various stages of distillation, such as a flasher, second evaporator, miscella stripper, and intermediate heater, the concentrated miscella is sent to the latest three passes first evaporator, which recovers the most hexane from the beginning. Next, the miscella is sent to the oil dryer, where any remaining moisture and moisture vapor is transferred via ejector to the miscella stripper.
With years of manufacturing and processing experience, H K Consultant & Engineers Pvt. Ltd. offers you low maintenance and minimal UT rejection equipment for solvent extraction plants with a commitment to quality.
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- Nothing to maintain
- Little need for personnel
- Minimized solvent losses
- No impurities were suspended in the extracted oil
- Minimal oil color
- Maximum oil recovery as a result of the largest extraction area