Corn germ oil production line manufactured by GREAT has 1VS1 guidance to customers and provides you with a full automatic control "turnkey project" with 30-2000TPD capacity.
Corn germ oil is extracted from corn germ, which is one of the most commonly used cooking oil. A complete corn germ oil production line includes corn germ pretreatment and prepressing machine, corn germ cake solvent extraction plant and crude corn germ oil refinery plant.
Corn germ pretreatment and prepressing plant: Corn germ→cleaning→softening→flaking→cooking→prepressing→crude corn germ oil + corn germ cake
Major Equipment: vibrating screen, magnetic separator, softening equipment, flaking roll, vertical cooker, screw oil press.
1. Cleaning
The corn germ extracted contains starch which can affect the oil yield and oil quality. Corn germ pretreatment and prepressing plant adopts vibration screen to remove the starch and bran in the corn germ to improve the purity. Adopts magnetic separator to remove the metal impurities to protect the equipment.
2. Softening
The cleaned corn germ enters the softening equipment to adjust the moisture content and temperature to increase the plasticity.
3. Flaking
The softened corn germ enters the flaking roll in the corn germ pretreatment and prepressing plant to be made into 0.3-0.4 mm flakes. Flaking is to destroy the cell wall, which is good for oil yielding.
4. Cooking
The corn germ flakes enter the vertical cooker for the cooking process. Cooking can denature the protein and make it solidify, agglutinate the oil and reduce the viscosity, which is good for oil pressing.
5. Prepressing
The cooked corn germ flakes enter the screw oil press which integrates adjusting cooker to adjust the moisture content and temperature of the cooked materials. The crude oil is filtered to remove the impurities and then enters the refining workshop. The pre-pressed cake is sent to the solvent extraction workshop for oil extraction.
Corn germ cake solvent extraction plant:
Corn germ cake solvent extraction plant uses the organic solvent to extract oil from the corn germ cake through soaking or spraying methods. There is only less 1% oil content in the meal after solvent extraction. This section includes corn germ oil extraction, wet meal desolventizing, miscella evaporation and stripping, solvent condensation and vent gas recovery.
Major Equipment: Oil extractor, D.T.D.C desolventizer-toaster, evaporator, stripping tower, condenser, recovery system
1. The corn germ cake from the prepressing plant enters the oil extractor, where the solvent is used to extract oil from the cake. The wet meal discharged from the oil extractor is sent into the desolventizer to remove the solvent. The dried meal obtained is sent to the meal warehouse for packaging. The mixed vapor discharged from the desolventizer enters the shell pass of the first evaporator as the heat source.
2. The miscella from the oil extractor is pumped into the first evaporator, the second evaporator and the disk stripping tower in the corn oil extraction plant to remove the solvent. The crude extracted oil obtained enters the refining workshop.
3. The solvent vapor in the corn oil plant enters the condenser. The condensate enters the water separator. The solvent separated enters the solvent holding tank. The water separated is boiled to recover the solvent.
4. The vent gas in the extraction plant enters the last condenser. The vent gas from the last condenser enters the mineral oil system in the corn oil solvent extraction plant to recycle the solvent.
Corn germ oil refinery plant:
Corn oil refinery plant is to remove the unneeded and hazardous substances such as phospholipids, free fatty acids, wax, pigment and unpleasant smell in the crude corn germ oil to obtain qualified refined oil. The process of corn germ oil refinery plant: Crude corn germ oil→degumming→deacidification→decolorization→dewaxing→deodorization→finished oil
Major Equipment: Degumming tank, nentralizing tank, decolorizing tank, crystalizer, deodorization tower, centrifuge, filter, vacuum pump, heat conducting oil furnace.
1. The filtered crude corn germ oil is preheated and mixed with phosphoric acid in the corn oil refinery. The colloids such as phospholipids absorb water and expand to form the emicelle which are precipitated to be removed.
2. The degummed oil enters the alkali refining tank and alkali liquid is added which reacts with free fatty acid to form soapstocks. The soapstocks are precipitated to be removed. Part of the impurities like pigment, phospholipids, protein and mucus are also adsorbed on the soapstocks to be removed.
3. The neutral oil is heated and soft water is added for water washing. Then the oil is centrifuged to remove the wastewater.
4. The water washed oil enters the decolorizing tank and is heated and dried under vacuum. The oil is then fully mixed with bleaching clay. After bleaching, the mixture is filtered to remove the waste clay. The decolorized oil enters the crystalizer in the corn oil processing plant and filter aid is added. Then the oil is cooled rapidly for crystallization. The mixture is filtered to remove the wax.
5. The dewaxed oil enters the deaerator to remove the air and then enters the deodorization tower for deodorization.The deodorized oil is filtered to obtain the refined corn germ oil.
