FIELD: feed production, in particular, commercial production of combined feed for farm poultry.
SUBSTANCE: method involves separating bulk combined feed and ground pellets into large-sized, average-sized and small-sized fractions with following separating of average-sized fraction as ready product; pelletizing small-sized fraction of bulk combined feed with hot pellets; holding layer of resultant mixture in heat-exchanger; cooling with air and grinding; returning large-sized fraction for additional grinding and discharging small-sized fraction for pelletizing. Mixture of bulk combined feed and hot pellets is held in heat-exchanger and further cooled with air having temperature of 4-7°C. After fractionation, average-sized fraction is coated with 0.5-1.0 mm thick fat layer in blade-type mixer under pressure of 0.3-0.4 MPa by means of nozzles, with fat being preliminarily heated to temperature of 55-65°C. Fat content is provided within the range of 3-5% by volume of resultant average fraction. Before supplying of air for cooling of mixture of bulk combined feed and hot pellets, air is preliminarily cooled in evaporator-cooler of heat pump unit by recuperative heat exchanging between boiling coolant and air. Air in then returned to evaporator-cooler and is newly supplied in closed-cycle mode for cooling said mixture. Heat generated by condensation of coolant in condenser-heater of heat pump plant is utilized for heating of fat before feeding it into blade-type mixer.
EFFECT: improved quality of ready product and reduced power consumed for preparing of combined feed.
2 cl, 1 dwg, 1 tbl
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