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In order to improve oil yielding rate and get high quality peanut oil, the peanut oil plant should consist of following processes: pretreatment, prepressing, extracting and refining section.
Refinery section of peanut oil plant
Here is a brief introduction of the peanut oil plant:
Ⅰ、Pretreatment section of the peanut oil plant
Pretreatment section is to remove the impurities in the raw material and change its structural characteristics, in order to make it accordance with the requirements of different oil producing process.
Magnitic seperating→ Metal impurities
Peanut cake→ Extracting Workshop
Peanut oil plant
1>Magnitic seperating：In order to remove the metal impurities, so that can prevent damaging the equipment and occuring safety accidents.
2>Cleaning: To remove the impurities in the raw matrial such as soil, stem and leaf, hull and moldy seeds.
3>Husking: In order to improve the oil yielding rate and the quality of crude oil and meal, reduce the wear to the equipment.
4>Crushing: To crush the peanut kernel into small sizes to improve pressing effect.
5>Flaking: To damage the oil cell, increase the surface of oilseeds, shorten the oil outflowing distance, in this way, it is beneficial to extract the oil and improve the cooking effect.
6>Cooking: This processing can improve prepressing oil yielding rate and the quality of the cake, adjust the moisture, temperature and plasticity of the flake.
7>Prepressing: To squeeze out part of the oil in the raw material, and improve extracting effect.
Peanut oil plant
Ⅱ、Extracting section of the peanut oil plant
Extracting section is to extract the oil by suitable organic solvent, this method can get the highest oil yielding rate.
Cake → Extracting→Wet Meal→Desolventising → Meal
Evaporating and stripping→ Solvent mixture →Condensing and Recovering
Crude Oil Solvent Recycling
1>Extracting：To extract the oil in the cake by solvent, the general solvent is 6# extraction solvent oil or commercial hexane.
2>Desolventising: To remove and recover the solvent in the meal; Dry and cool down the meal at the same time.
3>Evaporating and stripping: Heating the the miscella by indirect steam, so that can vaporize the solvent and concentrate the miscella.
4>Solvent recycling: This process is to recover the solvent, decrease solvent comsuption, keep safety prodution and improve product quality.
Ⅲ Refining section of the peanut oil plant
Refining section is to remove the impurities in the crude oil and improve oil quality.
Hot water→Degumming→ Oil Foot
Alkali liquor→ Deacidfying → Soap Stock
Activeted Clay→Decoloring → Waste Clay
Peanut oil plant
1>Degumming：To remove the gum impurities, and prepare for the subsequent refining processes.
2>Deacidfying：To remove the free fatty acid in the crude oil.
3>Decoloring: To remove the pigment in the crude oil by adding active clay, so that can improve the oil quality.
4>Deodorizing：To remove the odor in the oil, so that can improve the flavor, stability, color and quality of the oil.
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