Cooking Oil Negative Pressure Solvent Extraction Desolventizing and Condensation Equipment
Solvent extraction
The processing of vegetable oil in commercial applications is commonly done by chemical extraction, using solvent extracts,
which produces higher yields and is quicker and less expensive. The most common solvent is petroleum-derived hexane.
This technique is used for most of the "newer" industrial oils such as soybean and corn oils
Solvent Extraction Flow Chart
A Continuous extraction
Material enters the buffer bin on the extractor firstly,the buffer bin is equipped with automatic material level control system, use
variable frequency feeding screw conveyor to feed materials into extractor quantitatively .The materials run a circle from feed inlet
to outlet in extractor, and spray with miscella with descending concentration between inlet and outlet, before entering drain section,
spray with fresh solvent again, at last the wet meal discharges from the bottom of extractor, enters wet meal scraper. Concentrated
miscella is pumped to cyclone hydraulic separator by pump to remove meal powder, then enter the miscella tank to further
remove the impurities.
B .DTC desolventizing DTC
The wet meal discharged from the bottom of extractor is conveyed into upper part of the pre-desolventizing layer of DTC with scraper,
heating with indirect steam, make part of solvent evaporate, meal temperature rises; pre-desolventized meal falls into desolventizing
layer, utilize secondary steam from desolventizing layer to remove the solvent from the meal, later meal falls into desolventizing layer,
feed direct steam, the steam is injected into meal from small holes at the bottom for steam distillation of solvent in meal,to remove the
solvent,part of steam condenses in the meal, play a role in destroying active enzyme in the meal;the desolventized meal falls to
the bottom of drying layer by discharge valve for drying,the dried meal is cooled in the cold air layer and then discharged by scraper
and sent to the meal warehouse by the horizontal scraper.,
C.Evaporation, steam stripping
The miscella through the cyclone hydraulic separator go into the No. 1 evaporator, the DT vent can be used as the heating source
of the NO. 1 evaporator. The evaporated solvent discharge into the evaporator condenser through the top of No. 1 evaporator separator,
the vacuum of evaporator condenserkeep by the steam ejector. The concentrated miscella discharge from the No. 1 evaporator
separator at the bottom, heated by the miscella heat exchanger and entered into the No. 2 evaporator. The No.2 evaporator use the
indirect steam heating. The evaporated solvent gas go into the evaporation condenser with the solvent gas evaporated by the No.1
evaporator. The No.1 and No.2 evaporator are in the same vacuum. The second concentrated miscella flow out from the No.2
evaporator separator, pumped into the upper of oil stripper. The steam go into the oil stripper from bottom, remove the residue
solvent in the miscella. The vents go into the stripper condenser,the vacuum in the oil stripping condenser maintained by high
vacuum jet pump. At the bottom of the steam stripping tower, there is alevel control apparatus, which can guarantee the steady
flow of the liquid seal and finished oil. The crude oil draw out by the stripper pump,after cooling, the crude oil pump into the
oil storage tank.
,
.D.Solvent cooling and water separation section
Uncondensed vapor of the stripping condenser is pumped into the shell pass of No.1
evaporator by vacuum jet pump, uncondensed vapor of the evaporation condenser is pumped
into the shell pass of No.1 evaporator by vacuum jet pump, uncondensed vapor of shell pass
of No.1 evaporator enters the bottom of energy saver, heat exchange with fresh solvent, the vapor that has not been condensed
enters the atmospheric condenser for further condensate. Condensate of evaporation condenser and steam-stripping condenser
is pumped to water separation tank.The condensate of the first evaporator, the economizer shell condensate and other condensers
flows into the water separator, and after the water is separated, the solvent enters the solvent turnover library.The fresh solvent
pumped to the economizer to heat exchange and enter the extractor for recycling. The wastewater separated by the water
separator enters the steaming water tank,after evaporated the residual solvent and discharged into the water sealing tank.
2.2.5 Tail gas absorption
Uncondensed vapor out from vent condenser enters from the bottom of absorber, lean
oil sprays down from the upside of the absorber, counter currently contact vent through packing
layer to absorb solvent, absorbed vent discharges into atmosphere by vent fan through flame
arrester from the top of absorber .
Rich oil which absorbs solvent is pumped into the heat exchanger between lean oil and rich oil, then heated by rich oil heater,
and enters tower from the upside of desorber, inject direct steam from the bottom of oil stripper to desorber, desorpted gas
enters evaporator condenser, lean oil enters absorber to recycle after heat exchanging and cooling.
.
2.3 Process features
1.
Adopt loop extractor and big capacity recycle pump, with advantages of good permeation effect and lower solvent rate in the meal,
make sure the residual oil in meal not more than
1.0% under the circumstance of smaller material-solvent ratio. It can improve theconcentration
of the miscella, reduce the solvent in the meal,and reduced solvent evaporation greatly.
2.
Adopt negative pressure evaporation, reduce evaporation temperature, use DT vent from DTDC and the steam from steam-jet
pump to heat No. 1 evaporator,saved heating steam of No. 1 evaporator.
3.
Use heat exchanger in paraffin recovery process, exchange heat between high temperature paraffin lean oil and low
temperature paraffin rich oil, which saves part of heating.
4.
Adopt superior steam trap to reduce steam consumption in workshop, at the same time, collect all the steam condensate and
pump into it to the boiler room for recycling, economize soft water and thermal energy.
Crude extraction oil Quality:
| Item |
Quality index |
| Moisture and volatile matter ≤ |
≤0.2% |
| Insoluble impurities≤ |
≤0.2% |
| Residue solvent in crude oil ≤ |
≤100ppm |
Consumption index :
| Item |
Consumption index |
| Electricity consumption ≤ |
≤17.5kwh/t (including forbidden area facility) |
| Steam consumption ≤ |
≤250kg/t |
| Solvent consumption≤ |
≤1.6kg/t |
| Cooling water consumption |
The 1%-3% of circulating water quantity |
Note:
- Electric consumption , not include the outside equipment of extraction plant (such as the
cooling water tower, cooling water recycle pumps).
- steam consumption is based on steam gauge pressure 8-10bar(G), and environment
temperature≥20ºC.
- Solvent consumption is based on commercial n-hexane, and boiling point range 66-69ºC
Company information
Our company was estabished in 1950s ,now is one of the big oil equipment supplier in China .We have our own R&D department
and installation service team with richexperience.We have successfully obtained 27 national patents (7 invention patents),
6 international medals, 2 state awards, 2 provincial prizes.
Our main project scope include
--10~5000TPD oilseed pretreatment project
--20~5000TPD solvent extraction project
--10~500TPD oil refining project
--10~500TPD oil fractionation project
--Protein and phospholipid project
--Grain processing project
Typical project
--10~1000TPD rice bran pretreatment & expansion and rice bran oil extraction project
--10~600TPD grade 1 rice bran oil refining project
--150~1000TPD cottonseed protein dephenolization project
--10~100TPH palm oil project
--10~2000TPD corn processing project
--10~500TPD non-acid catalysis biodiesel project
Latest Technology
--Oil deodorization and vacuum energy-saving technology
--Protein concentrate extraction technology
--Miscella refining technology
--Molecular distillation technology
--Extracting sugar from broken rice technology
--Fully-continuous lignite wax extraction technology (the first production line in Asia)
Packing and shipping
Partical Case
Egypt |
100TPD Soybean Pretreatment and Soybean Oil Extraction Equipment With Egypt Customer |
Swaziland |
30T Soybean Oil Refining Equipment Sent to Swaziland |
Nigeria |
50TPD Peanut pretreatment and 15TPD Peanut Oil Refining Equipment With Nigeria Customer |
Russia |
50TPD Soybean Oil Production Line With Russia Customer |
Ethiopia |
50TPD Fully Continuous Sunflower Oil Refining Equipment With Ethiopia Customers |
Uzbekistan |
50T oilseeds pretreatment and oil extraction and oil refining with Uzbekistan Customer |
Nigeria |
20T Semi-continuous Palm Oil Physical Refining Equipment With Nigeria Customer |
Peru |
Palm Oil Physical Deacidification and Deodorization Equipment Sent to Peru |
Installation
Business scope
Our machines sell well in more than 30 provinces, and exported to Egypt, Sudan, Tanzania, Rwanda,Nigeria,
Estonia,Russia,Kazakhstan,Uzbekistan,Tajikistan,Bangladesh,Thailand,Malaysia,Indonesia, Bolivia,Peru and so on.
Now we have developed into a major oil machinery manufacture base in China.
FRQ:
Q:Are you a manufacturer or a trading company?
A:We are a factory with more than 30 years experience.
Q:What is your after-sale service ?
A:Our machine operation video and manual are for your reference. If necessary, we will send engineers to train your workers.
Q:How to ask quotation?
A:Please note us what tpye of raw seeds , and how many tons of raw seeds you want to treat per day, requirement of end oil.
then we will send you quotation as soon as we can.
Q:How to place an order?
A:First send us the enquiry below, including the device name, daily production, work hours, main processing materials, etc.,
then our sales manager will send you the information for your reference.
Q:How long does it take to receive my product?
A:As a general rule, it will take 1-2 Month for us to produce.
Q:Do you offer oversea installation?
A:Yes, we can send professional installation engineer to help you install the equipment, as well as training your workers freely.
Q:Can I visit your factory to check the machines and talk with your engineer?
A;Yes,of course,welcome for coming!!
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