Line for processing brewer's grain into a dry fodder additive for farm animals

The purpose of the study is to intensify the process of drying brewer's grains by reducing energy consumption for its processing. Tasks: development of a line for processing brewer's grains into a dry feed additive for farm animals. The object of the study is the existing and proposed lines for processing brewer's grains into a dry feed additive for farm animals. The subject of research is fresh brewer's grains. The research method is based on the analysis of experimental data obtained by the authors on the kinetics of drying spent grains, which is a waste product of the Belorechensky and Maikop breweries. Brewer's grain is a high-protein product that meets safety standards. The use of a protein supplement in animal diets helps to increase the nutritional value of feed. Raw brewer's grains do not refer to either dispersed materials or fine suspensions, but is a colloidal body that has a solid base with a high moisture content located in cells, pores and capillaries, and consists of crushed kernels and shells of grain with a particle size of 6-9 mm. Humidity of raw spent grains depends on the pneumatic or hydraulic method of grains transportation and varies within 80-90 %. The analysis of variants of intensification of the process of drying brewer's grains is carried out. Increasing the speed or temperature of the drying agent in order to intensify the process of convective drying of brewer's spent grains is unacceptable, as it can lead to protein denaturation and carryover of the fine dry fraction. It is proposed to install a roller crusher after the screw separator to destroy the compressed zones, which contributes to an increase in the mass transfer surface between the drying agent and the material being dried and the transfer of part of the bound moisture into free moisture when the cells of the material are destroyed. A line for processing brewer's grains into a dry feed additive for farm animals has been developed, including a screw separator, a roller crusher, a decanter centrifuge and a drum dryer installed in series.