Solvent Extraction Process



Towline Extractor Advantages:

1) The material is divided into several independent units on the material bed, which can effectively prevent miscella at all levels from fleeing hither and thither on the material layer and ensure the concentration gradient between several sprays.
2) Immersion area appears in each lattice, which can help achieve better immersion effect.
3) The chain box is supported by track and can prolong the service life of screen deck by not touching it.
4) The towline extractor is driven by world leading double-shaft hydraulic motor, with balance force, reliable operation and less maintenance cost.
5) Specialty suitable for the extraction of high oil and high power materials, and better immersion effect can be expected for ordinary oil plants.

Our company adopts the new high efficiency DTDC series desolventizer toaster.
Desolventizer toaster is the key equipment for wet meal desolventizing and passivation of anti-nutritional factors in the meal. Under the guidance of many years' of practice, our company has developed the new high efficiency desolventizer toaster, which sets desolventizing, drying and cooling in one, with simple operation, stable product quality

Desolventizer toaster advantages:

1. Passivate and damage the anti-nutritional components such as the urea enzyme and trypsin in the meal, and improve meal value in use.
2. Control the protein denaturation degree in the meal , and improve the NSI index effectively.
3. It can better regulate the color, flavor and taste of the meal.
4. It can better reduce residual solvent in the meal and regulate the meal moisture, so as to guarantee the minimum solvent consumption and safe use of the meal.

Vacuum Evaporation Advantages:

a) Vacuum evaporation features high efficiency, thorough de-solvation and low solvent consumption in crude oil.
b) Use the second steam of desolventizer toaster and remaining steam from steam jet pump as the heat source of the first steam, which can save energy, reduce the condenser configuration area and save investment.
c)Due to the low temperature of the steam, the crude oil features light color, good quality and low residual solvent.

Solvent condensation & recovery process：

Solvent condensation system combines with evaporation system closely, and evaporative condenser and steam stripping condenser all work under negative pressure. Non-condensable gas enters the energy saver from the shell of the first evaporator. In energy saver, non-condensable gas exchanges heat with condensate from the evaporative condenser. Finally, the condensate temperature discharged from energy saver is increased, and the solvent separated from water goes to solvent holding tank. The high temperature makes it unnecessary to be reheated for the recycling, so as to save energy.

Non-condensable gas from energy saver enters desolventizing condenser, in which a great deal of gas is condensed, and the tail gas is discharged into the final condenser. The solvent gas from the extractor enters extraction condenser, and the non-condensable tail gas enters the final condenser. For the free gas in final condenser, diversion box, holding tank, underground solvent library and miscella tank, cool them with low-temperatured cold water to recycle most of solvent gas. The tail gas with little solvent goes to paraffin recovery process.