Authors:
M. S. AKHMETVALIEV, engineer,
V. N. NIKOLAEV, candidate of technical sciences, associate professor
A. V. LITASH, engineer,
SOUTH URAL STATE AGRARIAN UNIVERSITY (75 Lenin Avenue, 454080, Chelyabinsk)
Abstract. The article reflects the process of dewatering of brewer's grains as one of the ways to solve the problem of disposing with the aim of obtaining a highly concentrated feed for farm animals which is an actual problem. The process of dewatering of brewer's grains is considered by means of an effective design of vibration-centrifugal centrifuge. The aim of the research is the theoretical substantiation of links between technological and physical properties of brewer's grains to determine the rational of the main parameters of vibration-centrifugal centrifuge. The scheme of separation of brewer's grains on liquid and thick fraction with the perforated rectilinear and curvilinear blades on each other in the direction of rotation of the rotor, making axial vibration in a vertical plane, which is due to differentiation (distribution) of the initial mass of the fluid stream and providing on this basis of equilibrated layer of filtered material on the surface of the blades is developed to establish the basic parameters of rotor blade vibration and centrifugal centrifuges. The straight blade has a rectangular holes up to 2 mm, and the curved one – holes up to 0.25 mm. Moisture content is one of the most important characteristics of any feed, that determines not only its state of aggregation and structural-mechanical properties, but also the nature of interaction with the working bodies of machines. As a result of the research with application of an analytical method technological and physical properties of a beer pellet in the interaction with the perforated rotor blades vibration and centrifugal centrifuges are determined. The equations for the yield of the liquid fraction of brewer's grains through the straight and curved blades of the rotor are obtained. It indicates the relationship of the technological and physical properties of brewer's grains, which are necessary to determine rational major parameters of the proposed vibration- centrifugal centrifuge in which the sludge moisture content of brewer's grains is 56–58 %.
Keywords: brewer's grains, vibratory centrifuge, blade rotor, filtration, dewatering, vibration.
