METHOD AND DEVICE FOR DRYING LOOSE DIELECTRIC MATERIALS Russian patent published in 2005 - IPC

FIELD: drying solid materials.

SUBSTANCE: method comprises evacuating volume up to 2·10^-3 mm Hg, supplying dry air with simultaneous evacuation up to the pre-break down pressure, and switching on the microwave heating. During drying, the pressure inside the chamber is controlled thus providing continuous evacuation. The device comprises drying chamber made of the multi-mode resonator. The side of the resonator opposite to the microwave bus is provided with vacuum-tight detachable flange with the lid. The resonator receives pads arranged in rows and made of radioparent material the height of the side of which is equal to the double depth of penetration of the microwave energy at its working frequency for given material and initial humidity. The distance between the pads does not exceed 0.1 of the microwave wavelength for maximum coefficient of charging of the resonator which is connected with the vacuum system.

EFFECT: enhanced efficiency of drying.

2 cl, 1 dwg