Welcome to RSP Processing

Beans are transferred from the main bulk storage silos to the Daybin.

Beans are sent through the VSC (Vertical Seed Conditioner) to uniformly heat the whole beans, forcing the moisture to the surface, softening the hull.

Soybeans are conveyed to be heated to coagulate the soy proteins, making oil extraction easier. The Jet Dryer assures even air heating and drying. In a short time the surface temperature of the hull increases, causing the hull to shrink and loosen itself from the bean.

The Hull Screener is a two-deck reciprocating separator. Solids are removed by cyclones into “Overs”, “Mids” and “Fines”.

Cracking rolls split the beans into smaller pieces and simultaneously releasing any remaining hulls from the beans. Beans are then prepared for Expanding / Flaking.

The Secondary Dehulling Aspirator devides the “Mids” from the Hull Screener into hull and meat pieces based on their different density. Meats fall through the aspirator towards the Flaking rolls.

In the flaking rolls the cracked and conditioned beans are rolled to a flake thickness to suite the customer’s specifications.

Expanding is the pre-treatment for direct extraction. Flakes are compressed in the Expander barrel by an interrupted worm and additional live steam. During this discharge of the material, the oil “boils” to the surface with the steam which flashes out and makes expanded collets.

The Collets are introduced into a bath of solvent (Hexane). Solvent soaks into the structure of the collet. Solvent goes into solution with the oil within the collet forming what is commonly referred to as Miscella. The miscella, heavily concentrated with oil, migrates out of the collet and into the solvent bath

The solvent is separated from the meal stream using a stacked tray-type Desolventiser-toaster (DT). The solvent is vaporised via heat transfer from steam-heated trays. A meal Dryer Cooler (DC) is used to dry the moisture from the meal and lower its temperature. This process can be referred to as a desolventiser-toaster dryer cooler (DTDC).

Once the solvent is separated from the meal and oil streams, it is a vapor that must be condensed. This condensation is typically accomplished in the shell-side of the First Stage Evaporator, in the vapor contactor and in shell and tube-type condensers using water as the cooling medium. The First Stage Evaporator utilises DT exit vapors as the heating medium.

The Second Stage is typically rising or falling film evaporator using steam as the heating medium.

The final stage of solvent separation from the oil stream is accomplished in a falling film disk and donut stripping column held under vacuum with super-heated steam as a stripping medium.

The condensed solvent contains significant water. Fortunately, solvent is not soluble in water. As a result, the lighter solvent fraction can simply be decanted from the heavier water fraction in a tank. Once separated, the water is heated to remove trace amounts of solvent prior to exiting the process.

The meal is then milled through a hammer-mill
to a specific granulation.

The final product is then conveyed to the bulk storage facilities.