Comparative analysis of microwave granulators implementing electrophysical methods for processing secondary agricultural raw materials

Abstract

Introduction. A promising direction for granulation of combined secondary raw materials of animal and vegetable origin is high-temperature molding of granules under the influence of an electromagnetic field of super highfrequency (SHF-EMF), which improves the microbiological parameters of protein feed.Results. Microwave granulators of multicomponent raw materials containing different design versions of resonators have been developed— for example, toroidal, cylindrical and ellipsoidal resonators. The electrodynamic parameters of these resonators are determined and the technical characteristics of the granulators are described. The required specific heat for the processing of secondary fat-containing raw materials has been calculated. With a granulator capacity of 200 kg/h and a specific power of the microwave generator of 1.4–2 W/g, the duration of exposure to the raw material weighing 0.8–1 kg in the resonator chamber should be 10–12 s. This ensures the minimum specific energy costs of 0.06 kW·h/kg.