About the Journal

Authors:

V. N. NIKOLAEV, candidate of technical science, associate professor,

M. S. AKHMETVALIEV, engineer,

A. V. LITASH, engineer,

SOUTH URAL STATE AGRARIAN UNIVERSITY (75 Lenin Avenue, 454080, Chelyabinsk)

Abstract. This article touches upon the problem of utilization of beer grains for the purpose of obtaining highly concentrated feed for farm animals, which is an actual problem for today. Based on the analysis of designs of centrifuges, developed a vibration-centrifugal unit for the separation of brewer's grains on a liquid and thick fraction. Improving the efficiency of the process and lifetime of the device is achieved through the use of differentiation (distribution) of the fluid stream in the separation process of brewer's grains on liquid and dense fraction and on that basis still thickened layer of filtered material on the surface of the blades of the rotor rotating with axial vibration, as well as reverse movement of the rotor will improve the filtration efficiency. Conducted preliminary research to identify the zero (baseline) values of kinematic parameters: frequency of rotation of the rotor, the amplitude of oscillation of the rotor, the oscillation frequency of the rotor affecting the final sludge moisture content. The assessment of the impact of each factor on the sludge dewatering in centrifugal rotor vibration and centrifugal installation planned four factor experiment at 3 levels of variation. The resulting nonlinear equation of multiple regression of the second order, which is a mathematical model based on the sediment's moisture spent grains from the main parameters of vibration-centrifugal setting specifying management settings: rotation frequency of the rotor = 500 rpm; amplitude of vibration of the rotor = 4 mm; the oscillation frequency of the rotor = 600 rpm; the area of the discharging flow = 0,00072 m2, in which the sludge moisture content of brewer's grains is 56 – 58%.