Modeling of block-modular grain cleaning technology based on centrifugal sieve separation

Abstract

Rational construction of the technological process of grain cleaning requires a thorough study of the initial grain material that should be cleaned. As practice shows, the cleaning process is very often built on the principle of repeated grain passage through the unit until the grain is brought to the required conditions (this situation is typical for standard units). However, the quality of grain cleaning and especially seeds does not depend on the number of times they are passed through the machines of the production line, but on how correctly the divisibility characteristics of a given grain mixture, the technical means of its separation and the operating mode of the working parts are chosen. It should be admitted that the separators used with a flat oscillating separating surface and punched calibrating holes have reached their maximum capabilities in their development. This is evidenced by the large number of research and development works carried out. One of the promising areas of research and practical creation of machines for grain cleaning is centrifugal sieve separation. Cleaning efficiency that meets the standards and high productivity of centrifugal screen separators is ensured by the integrated use of all components of the inertial-gravity field and the rational design of the working bodies. The use of such separators which do not have oscillating working bodies and are not subject to vibration makes it possible to switch to the block-modular principle of constructing production lines for grain cleaning. This separator uses fundamentally new working elements that make it possible to reconfigure the technological operating schemes creating the possibility of implementing fractional technology based on centrifugal screen separation. All of the above technical and technological provisions are partially implemented in the proposed technology.