BATCH DRYING UNIT COOLING TOWER NATURAL COOLING TOWER VACCUM CRYSTALLISER BATCH CRYSTALLISER FLUDISED BED DRIER HUMIDIFICATION & DEHUMIDIFICATION LONG TUBE CLIMBING EVAPORATOR TRIPLE EFFECT EVAPORATOR SHORT TUBE EVAPORATOR OPEN PAN EVAPORATORS VACCUM DRYER ANNULAS FLOW THROUGH FLUIDISED BED HEAT TRANSFER IN PACKED BED