| Customization: | Available |
|---|---|
| After-sales Service: | 1 Year |
| Warranty: | 12 Months |
| Shipping Cost: | Contact the supplier about freight and estimated delivery time. |
|---|
| Payment Methods: |
|
|---|---|
| Support payments in USD |
| Secure payments: | Every payment you make on Made-in-China.com is protected by the platform. |
|---|
| Refund policy: | Claim a refund if your order doesn't ship, is missing, or arrives with product issues. |
|---|
Suppliers with verified business licenses
Audited Supplier Audited by an independent third-party inspection agency
Oilseed solvent extraction, also known as "extraction", is the process of extracting oil from oilseed with organic solvent.
The solvent extraction of oilseed can be regarded as solid-liquid extraction, which is a process of separating the relevant components from solid materials by using n-hexane and other solvents to separate the relevant components from different substances. During leaching, the oil is treated with a solvent, in which the soluble components (mainly oils) are dissolved in the solvent. When the oil leaching is carried out at rest, the oil is transferred in the form of molecules, which belongs to molecular diffusion. However, most of the leaching process is carried out in the case of relative movement between solvent and particle. Therefore, in addition to molecular diffusion, there is also a "convective diffusion" process that depends on solvent flow.
Basic process: immerse the oil embryo (or prepressed cake) in the selected solvent, dissolve the oil in the solvent (to form the mixed oil), then separate the mixed oil from the solid residue (meal), evaporate the mixed oil according to different boiling points, stripping, vaporize the solvent into vapor and oil, so as to obtain the oil (leached crude oil). The solvent vapor is condensed and continues to be used after cooling and recovery. The meal also contains a certain amount of solvent. After desolubilization and drying, the dry meal is obtained. The solvent vapor volatilized in the process of desolubilization and drying is still condensed, cooled and recycled.
Batch type solvent extraction
The process operation of material embryo entering extractor, meal unloading from extractor, injection of fresh solvent and extraction of concentrated mixed oil are batch, intermittent and periodic leaching process. Mainly suitable for small-scale oil plants.
This kind of oil making equipment is mainly leaching tank, condenser, long tube evaporator, stripping tower, absorption tower and so on.
Batch leaching process:
1.The pre-pressed cake is fed into the leaching workshop through the conveyor, and raised to the conveyor through the bucket hoist. Then enter the inclined storage box or directly into the leaching tank in order to shorten the charging time of the leaching tank.
2.Open the top cover of the immersion tank, fill the material, and then seal the top cover tight.
3.Start feeding into the fresh solvent, first open the solvent pump and valves from the solvent swing tank, open the steam valve, so that the steam into the solvent preheater to heat it up. When the solvent temperature reaches 45-50 ºC, solvent pass the spray tube to enter the leaching tank and fills it up. (the solvent exceeds the cake plane 20-50 mm). open the free gas valve for normal immersion.
4.The soaking time is 10-15 minutes. Under the leaching tank of the mixed oil pump, the pump can be recycled into the tank for 5 minutes or directly pumped into the No. 2 leaching tank to fill the solvent oil. If the solvent is insufficient, the fresh solvent oil can be added.
5.Soak the mixed oil pump in No. 2 leaching tank for 15 minutes, soak the mixed oil pump in No. 3 tank for 10 minutes, soak the mixed oil pump in No. 4 tank for 10 minutes, and cycle the mixed oil 3 times for 4 times. If the concentration of the mixed oil is not enough, it can be recycled into the temporary storage tank of the mixed oil, and so on.
6.The mixed oil in the tank is collected under the leaching tank through a filter, and pumped into the temporary storage tank of the mixed oil. At the same time, the concentration of 60 be' brine is pumped from the brine tank into the temporary storage tank of the mixed oil, and fine chips are precipitated with brine in the tank.
Capacity :
1-15 tons/day, especially the extraction of small varieties of oil and precious oils.
Continuse solvent extraction process
The process of the extraction of the material embryo into the extractor, the removal of the meal from the extractor, the injection of the fresh solvent and the extraction of the rich mixed oil is a continuous leaching process.
It mainly includes the following four processes.
Solvent extraction process
Adopt this kind of Extractor in oil extraction system better. This kind of extractor is popular for good extraction effect, less trouble and less solvent residue in the wet meal. Equip with pneumatic sealing valve at the Cake Conveyer outlet to ensure no solvent leakage when there is no cake in Material Vessel before starting up and shutdown. Keep constant material level in the Material Vesse, which works for material sealing and make the material flow consistent. Fan on the Cake Conveyor avoids solvent entering into the pressing workshop.
For the Wet Meal Conveyor, adopt Extroversion-type driving bearing to reduce solvent corrosion and mechanical trouble.Adopt Hydro-cyclone to separate meal in miscella.
Wet Meal Desolventizing System:
The Desolventizer (D.T.D.C.) is made up of 7layers. The 1st and 2nd layers are designed for pre-heating wet meal to reduce moisture condensing. The 3rd layer and 4th layer are for pre-desolventizing. Mixture of steam and solvent vapor will pass through wet meal, which can not only make heat exchange but also remove some solvent in wet meal. The 5th is desolventizing layer. Fresh steam (let in) removes solvent in wet meal completely. In the 6th layer, blow in hot air to remove moisture in the meal. Then remove moisture and cool the meal to meet safety requirements in the 7th layer. After all these steps, the meal is sent outside of the extraction workshop to Meal House by Meal Conveyor.
Hot air used in Desolventizer (DTDC) is heated by Hot Air Heater (E304).
Features of Desolventizer (DTDC) supplied by us: good meal quality, thorough desolventizing, reasonable structure and stable performance.
Miscella Evaporation: Miscella is pumped to 1st-stage Evaporator (Heat Source:Indirect steam) to evaporate solvent in Miscella. Pressure in 2nd-stage Evaporator is the same as that in 1st-stage Evaporator. Miscella in1st-stage Evaporator overflows to 2nd -stage Evaporator (Heat Source: Indirect steam) for further evaporation.Then the miscall overflow to Oil Stripper (Pressure: 20Kpa). Reduce volatiles in oil to less than 0.2% in Oil Stripper.
The Miscella enters into the Oil Stripper from the top and contact counter-currentlywith the rising direct steam to remove the solvent residue.The Oil Stripper combines conventional oil stripper and crude oil vessel. Special spherical baffle plate disperses the oil to uniform, and makes the oil contact uniformly & thoroughly with the steam. Solvent and volatiles in Miscella are removed completely.The Oil Stripper is reasonable in structure and easy for cleaning and
disassembly/assembly.
Solvent Condensing System: Solvent condensing system is closely connected with evaporation system.The un-condensed vapours from Desolventizer (DTDC) enter into DT Condenser,where most of the vapours are condensed into liquids. Un-condensed vapours from 1st-stage Evaporator, 2nd -stage Evaporator, Oil Stripper enter into Condenser (E308).The vent vapours enter into Vent Condenser. In addition, solvent-carrying vapours from Combined Solvent-water Separator, Underground Solvent Tank, and Miscella Tank enters into the Vent Condenser to recover solvent by cold water. To make the gas discharged not harmful to environment and recover the solvent, solvent in tail vapour is further recovered by mineral oil.
Recovering Solvent with Mineral Oil: The vent gas firstly enters into the Mineral Oil Absorber (the mineral oil absorption temperature is less than 35ºC) . The mineral oil and vent vapors contact counter-currently. It is Paul Ring, whose surface area is big, in the Mineral Oil Absorber that ensures ideal absorption effect. Details are as follows:
Pump the rich mineral oil into the Heat Exchanger to make heat exchange between rich mineral oil and lean mineral oil. Then heat rich mineral oil in the Mineral Oil Heater by steam. Finally the rich oil enters into Mineral Oil Stripper, where gas-liquid heat exchange is made on the surface of Paul Ring between direct steam and mineral rich oil to remove solvent in the mineral oil. Then the mineral lean oil enters into Mineral Oil Absorber for reuse. Vent vapor is discharged of the workshop by Fan. If there is still some solvent in waste water, boil the waste water to make it meeting requirements as stipulated in National Standard.
Product quality:
1 the total volatile matter of crude oil is less than 0.2%.
2 the residual oil rate of meal is less than 1% (less than 2% of powder) and the moisture content is less than 12%.
3 the crude oil is generally required to meet the following standards: color, smell, taste normal; moisture and volatile 0.5%; impurity 0.5%; acid value refer to raw material quality standard, not higher than the prescribed requirements.
4 the quality of prepressed cake, tested at the outlet of prepress, requires: cake thickness 12 mm; cake moisture 6%; cake residual oil; 13 ≤ 18%.
Consumption index:
1 steam consumption 380 kg / ton;
2 electricity consumption 15 kW / t / ton;
3 cooling water 20 t / t;
4 solvent consumption < 2 kg / ton
){kind=link}