rice bran oil extraction
---Flow Chart:
Evaporation and Steam Stripping
↑
Sunflower Flakes→Oil extraction→Mixed oil processing→Crude oil
↓
Solvent collection←Wet cake desolventizing→Finished cake
---Process Description of equipment for oil extraction:
1). Solvent Extraction Procedure
The sunflower meal gets into the extractor through feeding scraper, the materials
run a circle from the feed inlet to discharge outlet in the extractor.
Spraying the extruded rice bran with the concentrate diminishing miscella
between the feed inlet to discharge outlet. Then before getting into the drain
off section, spraying again with fresh solvent, the drained wet meal discharges
into the wet meal scraper from the extractor’s discharge grid through kick-out device.
The concentrated miscella gets into the two-stage hydrocyclone from the pump,
to remove the powder impurities, finally get into the miscella tank.
This is preparation for oil press machine and cold press oil machine.
2). Desolventizing Procedure
The solvent contain wet meal that from the extractor are sent to the
DTDC desolventizer’s pre-desolventizing layer by scraper through air locker,
the bottom is heated by indirect steam to remove part of solvent;
then the predesolventized wet meal get into the desolventizing layer,
there are automatic control on the desolventizing layer to keep certain
thickness of materials, then the bottom gets into the direct steam to remove
all the solvent, at same time some steam condense in the meal,
the moisture content of meal will sectional rise after sunflower oil production line.
The desolventized meal falls onto the drying layer quantitative through rotary valve,
the drying layer keeps certain materials level, then process the drying procedure,
after drying get into the cooling layer to lower down the temperature,
finally discharge the finished meal through automatic flow controlling gate,
then though the scraper to transport the meal to warehouse for oil press machine
and cold press oil machine.
3). Evaporation Procedure
The miscella gets into the first long tube evaporation pass from the miscella tank,
the evaporated solvent gets into the evaporation condenser through separation
chamber, there are liquid level controlling device on the separation chamber’s outlet
pipeline to keep the liquid seal, the miscella that after first evaporation concentration
gets into the second long tube evaporator for evaporating process.
The shell pas is heated by indirect steam, the evaporated solvent vapor gets into
evaporation condenser through separation chamber, there are liquid level controlling
device on the separation chamber’s outlet pipeline to keep the liquid seal.
The miscella gets into the stripping tower’s disks from the top of the tower,
then fall down layer by layer, meanwhile jet direct steam from the bottom of
tower to remove the residue solvent of sunflower oil production line.
The top exit connects evaporation condenser, the high vacuum jet pump
keep the stripping tower working at negative pressure condition,
also there are liquid level controlling device in the bottom of stripping tower to
keep the liquid seal and steady flow quantity of product oil,
the crude oil are extracted out from the bottom of tower through
extraction pump, after cooling then get into crude oil tank for
sunflower seeds oil press machine.
4). Solvent Condensation and Water Separation Procedure
The liquor condensate that from evaporation condenser, energy saver
condenser and steam stripping condenser is collected together then
through recovery pump to inject them into water segregator.
The end condensed steam enter into the energy saver condenser,
the energy saver’s liquor condensate and first evaporation shell
pass’s liquor condensate get into the water segregator directly.
The free gas of energy saver condenser,tripping condenser, water segregator
and solvent library together enter into the final condenser, the end steam from
final condenser is absorbed by paraffin recovery device of oil press machine
and cold press oil machine.
The solvent phase of water segregator flows into solvent library for partial recycling,
the water phase discharged into steam tank, the direct steam gets into the steam tank
from the bottom to evaporate residue solvent, after this the water phase
discharged into water seal tank.
5). Tail Gas Absorption Procedure
The non condensed vapor from extraction evaporator, DT evaporator, oil stripper,
cooking pot, water segregator and underground solvent tank, get into the final condenser
for recovering the solvent, the non condensed vapor from the final condenser gets into
the mineral oil recovery device, the free gas are discharged into air through fire barrier.
The above is our technology introduction, if you are in the market for rice bran oil extraction, don't hesitate to contact with Joanna.
Mobile: +86 13526828605 (welcome to add my whatsapp&viber) Skype: joanna.lu10