Solvent extractor DT

Our DT has six stages (can vary according to plant capacity orrequirement) with top two stages for de-solventizing and subsequentstages for toasting without over heating to give light colored meal free ofsolvent and high in protein content. The meal exiting the extractor contains30-35% solvents by weight. The meal is thus heavily solvent-laden and thepurpose of the de-solventizing process is to remove the solvent. The goalis also to toast the meal so that antinutritional factors are controlled, andthe moisture and temperature of the meal is reduced to levels appropriatefor storage and transport. Live steam is condensed and latent heat is usedto supply most of the heat supplied for evaporating the solvent from themeal. This simultaneously increases the moisture in the meal to facilitatetoasting. Air is passed through a fluidized bed of meal and this way, dryingand cooling of the meal is accomplished. Before passing on to distillationfor heat recovery, the solvent and water vapours exiting the de-solventizingprocess, pass through a scrubber to remove meal particles. In our DT, the steam provided within DT chambers are controlled byautomatic controlled valve. Hence chances of over heating and incompleteheating is reduced to meal. At each stage, the bed heights are controlledby vapor tight, carbon steel construction with numerous stages; and abottom driven drive-mechanism with mechanical float and door system.The shaft is centrally driven with specially designed scrapper with ahardened face.