Study of feed drying in a combined crushing-drying and mixing device

Abstract

Background and Aim. When operating feed preparation equipment, there are such problems as bulkiness and increased costs, which increases the cost of feed. It is relevant to conduct research on combined devices with several technological processes in one device using a screw and a leveling device. The leveling device moves the raised feed mass to the end walls of the bin. When the fingers of the leveling device work, an excessively high rise of the feed mass is eliminated and the mixing process is accelerated due to the uniform movement of the feed mass across the entire width of the bin. Acceleration of the drying process of wet feed is explained by the fact that new portions of wet feed are constantly exposed to hot air.
Materials and Methods. To conduct research on the drying process, a developed grinding, drying and mixing device was used. Eggshells and waste yolks of chicken eggs served as the object of drying. When conducting experimental studies, a method of conducting single-factor experimental studies and control and measuring devices were used.
Results. As a result of experimental studies and processing  of experimental data, a mathematical model of the drying process of feed meal particles was obtained, i.e. a model of intensive heat and mass transfer was obtained due to convective drying, screw-finger mixing and simultaneous grinding in a combined grinding-drying and mixing device.
Conclusion. The developed design and technological scheme of a combined grinding-drying and mixing device ensures stable implementation of the processes of grinding, drying and mixing of feed. The originality of the technical solution is confirmed by the issuance of a patent of the Republic of Kazakhstan for invention No. 36486.