Main economic and technical parameters of rapeseed extraction machinery :
|Residual oil in meal||≤1% (rapeseed)|
|Solvent consumption||≤3Kg/T(6#solvent oil)|
|Crude oil moisture and volatile matter||≤ 0.30%|
|Power consumption||≤ 15KWh/T|
|Steam consumption||≤280Kg/T (0.8MPa)|
|meal moisture||≤ 10-13% (adjustable)|
|Residual solvent in meal||≤ 300PPM (qualified detonated experiment)|
Technology process of rapeseed oil solvent extraction equipment :
The pre-pressed cake or flake, firstly enter into the sealed scraper blade to avoid the solvent gas escaping because of the section without screw blade in the sealed auger. Rapeseed seeds enter into the box-chained loop type extractor counter-currenting with the solvent, the grease is extracted. Miscella condensity increase from 2% to more than 25%. Miscella discharged from extractor and into miscella filter, then the leached meal in the miscella tank enter into evaporation system through 1st evaporation feed pump and finally drop-in DTDC out from wet meal drag conveyor.
Using the secondary steam desolventized from DTC desolventizer and produced by steam-jet pump to heat and evaporate micella in the first long-tube evaporator. Export temperature reaches to 58-62℃ and condensity reaches to more than 65%. Then, micella enters into the second long-tube evaporator in which the temperature is heated to 105-110℃ by indirect steam and the condensity reaches to more than 95%. Then miscella enters into stripper in which residual solvent in oil will be removed, the export temperature reaches to about 105℃ and the general volatile of the extracted crude oil is less than 0.30%.
Rapeseed Wet meals discharged from the bottom of extractor enter the top of DTDC and land on the predesolventizing trayers where they are heated by the indirect steam, thus, some solvent in meal is evaporated and meal temperature is risen; Predesolventized meals land on predesolventizing trayers where they use the second steam in desolventizing trayers to predesolventize solvent from meal, then, meals enter desolventizing layers in which direct steam is injected.
4.Condensation recovery process
Extractor is equipped with a separate condenser, 1st and 2nd evaporation share one condenser. Low and high temperature of solvent gas both from 1st and 2nd evaporation enter into the condenser after its neutralization, which greatly reduces the load of condenser and improves the efficiency of condensing. Stripping and analyzing share one condenser, the non-condensable gases from extractor and other condensers enter into the vent gas recovery system through the final condenser.
Brief description of rapeseed extraction machine and its advantages:
1.Absorbing the world’s leading core extraction technology, design and develop a process which is efficient, economical and reliable.Adopting box-chained loop type extractor can effectively achieve low residual oil, low solvent consumption and low failure rate of equipment.
2.Full automatic computer control system is adopted in extracting process, adjust automatically and operate stably.
3.Negative pressure technology is adopted in condensate system.
4.Stainless steel heat exchange tubes and multistage baffling make the condenser have a high heat transfer efficiency, also the water consumption is low.