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Rice bran oil extraction machine

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Rice bran oil extraction machine:Pretreatment of rice bran with rice bran oil extraction machine: The raw rice bran may contain a small amount of impurities an

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 Rice bran oil extraction machine:

Pretreatment of rice bran with rice bran oil extraction machine: The raw rice bran may contain a small amount of impurities and is removed by screening; the rice bran and glutinous rice are separated, and then the tempering system is introduced to pass a small amount of steam into the raw material (about 2% of the raw material amount). ), make it quenched and tempered to facilitate subsequent puffing or granulation. After the pretreatment, the rice bran directly enters into the granulator or the extruder, the expanded or granulated rice bran is cooled, and then the rice bran oil extraction machine extracts the rice bran oil.

Rice bran oil extraction machine:

Pretreatment of rice bran with rice bran oil extraction machine: The raw rice bran may contain a small amount of impurities and is removed by screening; the rice bran and glutinous rice are separated, and then the tempering system is introduced to pass a small amount of steam into the raw material (about 2% of the raw material amount). ), make it quenched and tempered to facilitate subsequent puffing or granulation. After the pretreatment, the rice bran directly enters into the granulator or the extruder, the expanded or granulated rice bran is cooled, and then the rice bran oil extraction machine extracts the rice bran oil.

Rice bran oil extraction machine extraction workshop process: the pancake enters the rice bran oil leacher, and the solvent n-hexane is added to the pan, so that the grease in the pancake is dissolved in the solvent to form a mixed oil, and the mixed oil passes through the filter medium (screen), which contains The solid smut is trapped and a clean oil is obtained, which is sent to the evaporation process.

Rice bran oil extraction machine blended oil evaporation: the use of oil almost no volatilization, and the low boiling point of the solvent, easy to volatilize, the use of split tube steam heating to vaporize most of the solvent evaporated, so that the concentration of grease in the mixed oil greatly increased.

The mixed oil phase enters the first long tube evaporator tube stage from the mixing tank and the evaporated solvent passes through the separation chamber into a steam condenser; the concentrated mixed oil enters the second long tube evaporator for evaporation, and the vaporized solvent vapor is separated. The chamber enters the two steam condensers. The solvent vapor from the first and second evaporators contains no water, and is directly cooled to the circulating solvent tank after being cooled by the cold exchanger.

This process mainly uses a long tube evaporator, which is characterized by a long heating pipe. After the preheated mixed oil enters the heating pipe from the lower part, it rapidly boils, generating a large amount of steam bubbles and rapidly rising. The mixed oil is also driven by the rising vapor bubbles and pulled as a layer of liquid film rises along the tube wall, and the solvent continues to evaporate during this process. Since the heat transfer is performed in the thin film state, the evaporation efficiency is high.

The stripping stage of the rice bran oil extraction machine: The concentration of the blended oil is greatly increased by evaporation, but it still contains a small amount of solvent oil and is removed by stripping. The mixed oil is immiscible with water, and direct steam with a certain pressure is introduced into the high boiling point mixed oil (the direct steam flux is about 2% of the mass of the material), and indirect steam is introduced into the jacket of the equipment. Heating, so that the direct steam introduced into the mixed oil does not condense, the sum of the direct steam and the solvent vapor pressure is balanced with the external pressure, the solvent boils, thereby lowering the boiling point of the high-boiling solvent, and the uncondensed direct steam entrains the distilled solvent together Into the condenser for condensation recovery. After stripping, the obtained crude oil is refined into a physical refining plant.

The wet pick-up desolvation section of the rice bran oil extraction machine: the rice bran oil extraction machine contains a certain amount of solvent in the wet mash filtered by the machine, and steam is degassed to remove the solvent therein, and the principle is basically the same as that of the mixed oil stripping. After steaming off the indirect steam heating, the rice bran is dried. Delivered to the warehouse.

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