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Introduction
In the oil seed industry, meal is separated from solvent using a desolventiser toaster, or, desolventiser toaster dryer cooler. Often the desolventiser toaster, dryer cooler, and desolventiser toaster dryer cooler, are abbreviated simply as ‘DT', ‘DC’ and ‘DTDC’ respectively. A DTDC is simply a DT and DC combined into one cylindrical column.
The DTDC consists of a long cylindrical shell with trays separating the various stages. The first trays are known as the predesolventizing trays. Below these trays are the counter-current trays, sparge tray and steam drying tray. Each tray has rotating agitators known as sweeps or arms. The agitators move the meal across the tray until it exits through a discharge port and onto the next tray. The agitator arms are fixed to a central shaft that is driven by a large electric motor via a single gearbox.
This 3D model shows all major components associated with a typical DTDC, these include:
- Cylindrical Shell
- Sweeps/Arms
- Gearbox
- Electric Motor
- Predesolventising Trays
- Counter-Current Trays
- Steam Sparge Tray
- Warehouse (Crush Seed Extraction Building)
Additional Resources
http://www.crowniron.com/wp-content/uploads/2018/01/DTDC.pdf
http://www.crownironasia.com/Sections.asp?ID=40
https://lipidlibrary.aocs.org/edible-oil-processing/meal-desolventizing-toasting-drying-and-cooling
http://www.cnoiltreatment.com/desolventizer-toaster-dryer-cooler.html