ANALYSIS OF MULTI-DISC GRINDING PROCESS OF RICE GRAINS

Abstract

Grinding process is one of the major steps in production of powders for food, chemical and energy use. It still characterized by insufficient operation indicators such as efficiency, energy consumption, quality of product. Bering it in mind the aim of the work is to analyze the multi-disc grinding process of grainy biomass and search the dependence between operation parameters, like angular speed of cutting edge, feeding speed, and operation indicators. Research problem formulated as a question: how the angular speed of cutting discs affects real efficiency, energy consumption and grinding product quality? To resolve the problem an experiment on five disc mill was done considering variable disc angular speed and measuring in real time the changes of power demand and angular speed of each disc, product weight increase. The test allows to say that disc speed has an influence on the energy consumption and the product quality. It was observed that the lower disc speed the lower energy consumption and bigger the product particles. For real efficiency, based on the results obtained, the dependence on the angular discs speed cannot be clearly determined.