METHOD OF CONTROLLING MIXED FODDER PRODUCTION PROCESS Russian patent published in 2004 - IPC

FIELD: mixed fodder production and biotechnology. SUBSTANCE: invention aims at automating mixed fodder production process and comprises grinding and fractioning loose mixed fodder by sieving it through vibrosieve into coarse, middle, and fine fractions. Middle fraction is collected as final product. Fine fraction is granulated being subjected to heat treatment with steam, whereupon hot granules are mixed with loose mixed fodder. This procedure includes temperature and moisture equilibration of mixture before its cooling. Coarse fraction is recycled. During mixed fodder production process, one additionally measures consumption of loose mixed fodder as well as consumption of coarse, middle, and fine fractions and uptake and pressure of steam utilized in heat treatment of fine fraction. Also measured are: granulator drive power, temperature and consumption of hot granules, air uptake on cooling of mixture of hot granules with loose mixed fodder, moisture content and consumption of the mixture prior to be ground, rotation frequency of rolls and distance between mill rolls, amplitude, vibration frequency, and horizontal inclination of vibrosieves. From summary consumption of hot granules and loose mixed fodder to be mixed, heat and moisture exchange time is found. From moisture content of the mixture and its consumption before grinding, distance between mill rolls and their rotation frequency are found, respectively. Granulator drive power is found from consumption of fine fraction, and steam intake corrected taking into account hot granule temperature is found from pressure of steam used in heat treatment of fine fraction. Current ratio of coarse and middle fraction consumptions is continuously monitored. When this ratio deviates from specified values toward higher values, one raises amplitude and rotation frequency of vibrosieves and lowers their horizontal inclination. When above ratio deviates from specified values toward lower values, one lowers amplitude and rotation frequency of vibrosieves and raises their horizontal inclination. EFFECT: improved quality of produce thanks to increased process control precision and reliability. 1 dwg