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RF DRYING SYSTEM A new RF drying system for rapidly drying temperature sensitive materials such as filter cake and granular or pelletized materials is available from Radio Frequency Co., Inc. of Millis, Massachusetts.
Rapidly removing water from material at bed depths up to 6", the Macrowave™ RF Drying System applies radio waves at a frequency of 40.68 MHz. Typically requiring one-fifth the floor space of conventional dryers, this system can reduce labor and energy costs by up to 60%, claims the firm. Related applications include crystallization and the solid-stating of polymers. The Macrowave™ RF Drying System is priced from $195,000 up, depending upon configuration. Literature and fee-based sample testing are available.
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The Macrowave™ RF Drying System employs volumetric heating which keeps the temperature uniform throughout temperature-sensitive materials, reduces the moisture content to levels as low as 200 PPM, and eliminates the long dwell times required by conventional surface heating methods. Providing instant ON/OFF control, this conveyorized RF drying system is a suitable replacement for tumble-, spray-, tray-, spin flash-, and belt/tunnel dryers.