Drying installation for granular products in the suspension layer

Abstract

One of the main problems of wet plant products drying processes is the long duration of thermal tartarization, which consequently leads to the diminution of the quality indices. This problem is exacerbated in the case of oil products drying, high in fatty acids receptive to oxidation processes. For such products, especially granulation, as grape seeds are, drying in a suspended layer with microwave application is beneficial. This method allows automatic selection of already dried particles from the seed table and removing them from the heating zone, thus ensuring a maximum reduction of heat treatment time, so also favorable conditions for oxidation of fatty acids. The paper presents the construction of a laboratory installation for the study of the kinetics of drying processes in suspended layer with microwave application. The installation allows the online recording of the temperature, speed and humidity of the air in oilseeds and out and periodic recording of the mass decrease of the product.