R FOR LOOSE MATERIALS Russian patent published in 2004 - IPC

FIELD: equipment for microwave drying of loose materials; food-processing, chemical and other industries. SUBSTANCE: proposed drier has drum rigidly secured in metal cylindrical housing for rotation in two anti-friction bearings secured in immovable covers; housing has line of transmission of surface wave made in form of finned structure on inner cylindrical surface; it is made in form of alternating concentric grooves at width of (0,04-0,05)λ and fins at thickness of (0,02-0,03)λ; perforated cylindrical walls of drum are made from radio-parent material; supply of microwave energy to transmission line is performed from separate microwave oscillator at frequency different from frequency of microwave oscillator connected with system of wave-guide slotted radiators. EFFECT: smooth distribution of microwave energy in volume of product at high degree of loading. 2 cl, 3 dwg