Filters and dryers
A dryer is used for the evaporation of liquids from solids.  Most types of dryers are indirectly heated with either an internal exchanger coil or an external heat transfer jacket.  This allows the use of remote heating and cooling utilities such as water or oil to precisely control temperatures inside the dryer.  A moisture-laden product is introduced into the drying chamber and is heated to a temperature required to drive off liquid from the product.   Many dryers operate under a vacuum to facilitate this evaporation.  There are a wide range of indirectly heated process dryers available.
Industrial filter is a filtration technique used in applications such as dye, paint, and pharmaceutical production[1] and waste water treatment.[2] Safety requirements and environmental concerns due to solvents evaporation led to development of this type of filter wherein filtration under vacuum or pressure can be carried out in closed vessels and solids can be discharged straightaway into drier.
A typical unit consists of a dished vessel with a perforated plate. The entire vessel can be kept at desired temperature by using a limpet jacket, jacketed bottom dish & stirrer (blade & shaft) through which heat transfer media can flow. The vessel can be made completely leak proof for vacuum or pressure service.