Rice Bran Oil Extraction Plant Introduction
Rice bran oil extraction plant produces rice bran oil using expansion extraction technology. The rice bran oil plant includes rice bran pretreatment & expanding workshop, rice bran oil solvent extraction workshop and rice bran oil refining workshop. Rice bran oil production line adopts rice bran expander to make the rice bran into porous expanded pellets, which improves solvent permeability and increases extraction efficiency. Adopts negative pressure evaporating system and mineral oil system, having the features of saving energy and good crude oil quality. Rice bran oil refinery plant adopts physical deacidification and deodorization technology, having high refining yield and the oil obtained has shallow color and good quality.
Advantages of Rice Bran Oil Plant
1. Rice bran oil processing plant adopts expansion technology, which increases extraction efficiency, reduces residual oil rate and improves the quality of the extracted oil.
2. Rice bran oil extraction plant adopts negative pressure evaporating system, having the low evaporating temperature, the extracted oil has good quality and shallow color, saving steam consumption.
3. Rice bran oil extraction plant adopts mineral oil system to reduce solvent consumption.
4. Rice bran oil refinery plant adopts physical deacidification and deodorization technology, having good deacidifying and thermal decoloring effect, high refining yield, good oil quality.
5. The decolorization process of the rice bran oil refinery plant combines premixing with steam stirring, having good decolorization effect. The negative pressure operation ensures the quality of the oil.
The Process of Rice Bran Oil Production Line
Rice Bran Pretreatment & Expanding Workshop
rice bran→rice bran cleaning→rice bran and broken rice separation→conditioning→expanding→drying and cooling→to solvent extraction workshop
1. Rice Bran Cleaning
First, the rice bran enters the cleaning screen in the rice bran oil plant to remove the impurities. Then roller magnetic separator is adopted to remove the iron impurities. Iron impurities can cause damage to the expander and influence the expansion effect.
2. Rice Bran and Broken Rice Separation
The rice bran goes through rice bran & broken rice separator to remove broken rice and whole rice. This process can ensure normal operation of the rice bran oil processing plant, reduce residual oil rate in the meal, reduce solvent consumption and increase the oil yield. The broken rice can be used for sugar and liquor making.
3. Rice Bran Conditioning
Conditioning is to preheat the rice bran and adjust the moisture content. The moisture content can decide the elasticity and plasticity of the expanded materials. Preheating can improve the expansion effect and increase the capacity. The rice bran enters the conditioner for conditioning process in the rice bran oil production line.
4. Rice bran Expanding
The conditioned rice bran enters the rice bran expander and direct steam is injected. By the rotating of the main worm shaft, the materials are extruded, heated, sheared and kneaded, the temperature and pressure increases and the materials are extruded out. With the sudden decrease of the pressure, the moisture evaporates rapidly and the materials expand and form the porous pellets.
Adopting expansion technology in the rice bran oil production line can increase extraction efficiency, reduce residual oil rate in the meal, increase the capacity of the oil extractor, reduce power consumption and improve the quality of the extracted rice bran oil.
5. Drying and Cooling
The expanded materials have high temperature and high moisture content and shall be dried and cooled to meet the requirement of the extraction process. Usually, chain dryer or pneumatic dryer is adopted in the rice bran oil processing plant for the drying and cooling of expanded rice bran.
Rice Bran Oil Solvent Extraction Workshop
rice bran→solvent extraction→wet meal desolventizing→evaporating and stripping→solvent recovery→crude extracted rice bran oil
1. Solvent Extraction
The expanded rice bran enters the rotocel extractor or loop extractor in the rice bran oil extraction plant to extract the oil with a solvent. The drained wet meal is sent to the DTDC desolventizer by the wet meal scraper conveyor. The thick miscella is pumped into the miscella centrifugal separator and continuous miscella filter to remove the solid impurities, and finally pumped into the miscella holding tank.
2. Wet Meal Desolventizing
The solvent containing wet meal discharged from the oil extractor enters the DTDC desolventizer to separate the solvent from the meal. The wet meal first enters the predesolventizing layer of the desolventizer to remove part of the solvent heated by indirect steam. After that, the meal enters the desolventizing layer to remove the rest solvent distilled by direct steam. The desolventized meal contains a large amount of water and falls into the drying later to remove water. The dried meal enters the cooling layer to lower down the temperature and is then sent to the meal storehouse for packaging. The mixed vapor from the desolventizer in the rice bran oil plant enters the shell pass of first long tube evaporator as the heat source.
3. Evaporating and Stripping
The miscella from the miscella holding tank enters the first evaporator, the second evaporator and the disk stripping column in the rice ban oil plant to separate solvent and crude rice bran oil. The solvent vapor enters the condensing system. The crude oil enters the crude oil holding tank. The rice bran oil extraction plant adopts negative pressure evaporation technology, saving steam consumption and the extracted crude oil has good quality.
4. Solvent Recovery
The solvent vapor in the rice bran oil extraction plant enters the condensing system. The non-condensing vapor from the evaporating condenser and stripping condenser is pumped out by the steam jet pump and pumped into the shell pass of the first evaporator, resulting in the negative pressure of the evaporating system.
The condensate from the condensing system enters the water separator. The solvent separated enters the solvent holding tank for recycling use. The water separated enters the boiling tank to strip the residual solvent by direct steam.
The solvent-carrying air in the rice bran oil extraction plant enters the vent gas condenser. The vent gas from the vent gas condenser enters the mineral oil system in the rice bran oil plant. The unabsorbed vent gas is vented into the atmosphere.
Rice Bran Oil Solvent Extraction Workshop
rice bran→solvent extraction→wet meal desolventizing→evaporating and stripping→solvent recovery→crude extracted rice bran oil
1. Solvent Extraction
The expanded rice bran enters the rotocel extractor or loop extractor in the rice bran oil extraction plant to extract the oil with a solvent. The drained wet meal is sent to the DTDC desolventizer by the wet meal scraper conveyor. The thick miscella is pumped into the miscella centrifugal separator and continuous miscella filter to remove the solid impurities, and finally pumped into the miscella holding tank.
2. Wet Meal Desolventizing
The solvent containing wet meal discharged from the oil extractor enters the DTDC desolventizer to separate the solvent from the meal. The wet meal first enters the predesolventizing layer of the desolventizer to remove part of the solvent heated by indirect steam. After that, the meal enters the desolventizing layer to remove the rest solvent distilled by direct steam. The desolventized meal contains a large amount of water and falls into the drying later to remove water. The dried meal enters the cooling layer to lower down the temperature and is then sent to the meal storehouse for packaging. The mixed vapor from the desolventizer in the rice bran oil plant enters the shell pass of first long tube evaporator as the heat source.
3. Evaporating and Stripping
The miscella from the miscella holding tank enters the first evaporator, the second evaporator and the disk stripping column in the rice ban oil plant to separate solvent and crude rice bran oil. The solvent vapor enters the condensing system. The crude oil enters the crude oil holding tank. The rice bran oil extraction plant adopts negative pressure evaporation technology, saving steam consumption and the extracted crude oil has good quality.
4. Solvent Recovery
The solvent vapor in the rice bran oil extraction plant enters the condensing system. The non-condensing vapor from the evaporating condenser and stripping condenser is pumped out by the steam jet pump and pumped into the shell pass of the first evaporator, resulting in the negative pressure of the evaporating system.
The condensate from the condensing system enters the water separator. The solvent separated enters the solvent holding tank for recycling use. The water separated enters the boiling tank to strip the residual solvent by direct steam.
The solvent-carrying air in the rice bran oil extraction plant enters the vent gas condenser. The vent gas from the vent gas condenser enters the mineral oil system in the rice bran oil plant. The unabsorbed vent gas is vented into the atmosphere.
