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.   Shown above is a Shelf Dryer. 

Please click on Types of Dryers to see other types of indirectly heated dryers.

Dryers are used to remove moisture from almost any material from powders and flakes in pharmaceutical and chemical processes to pellets, sheets, and fibers in the plastics and textile industries.   There are applications for dryers in the mining, food, printing, and paper industries as well; many materials need to be dried as part of their finishing operations.  

Please select the Critical Data tab to review specific data required to properly design a drying process.

In order to accurately size a heating system for a Dryer, the process should be analysed for specific data, such as:

• The amount of material to be heated, including the mass of the process equipment itself, along with the temperatures and time required, will help determine the size of the heater in the HEAT system
• Thermal fluid flow rate must be considered; the dryer manufacturer can specify the flow rate, the pressure drop and pressure rating of the jacket
• Also, the total volume of thermal fluid media in the piping and the jacket will help determine the system Expansion Tank capacity.

Click on the Inquiry Forms link for complete system design information.