METHOD OF HEAT RECYCLING AND RECOVERY IN FLOUR MILLING USING VAPOR COMPRESSION HEAT PUMP Russian patent published in 2017 - IPC B02B1/00 F26B3/00 

FIELD: agriculture.

SUBSTANCE: wet grain is preliminary heated, dried, cooled, fed to the storage with further feed into the preparatory department of the flour milling plant to extract impurities and clean the surface of the grain, followed by moisturizing, binning and grinding in thegrinding mill. Then the mixture of the processed drying agent is fed after drying, cooling and storing of grain into cyclone cleaner for cleaning from contained suspended solid particles, followed by further feeding of the mixture into evaporator of vapor compression heat pump for cooling and drying. The drained mixture is divied into three streams, one of which is initially fed into the heat exchanger, then into the condenser of vapor compression heat pump and further into the shaft grain dryer, the second stream is fed into a cooler for cooling the grain after drying, and the third stream is fed for the active ventilation of the grain during its storage in tankers. The resulting condensate is disposed from the evaporator of vapor compression heat pump into the intensive moisturizing machine, water is cooled in the heat exchanger, used for heat removal from a fast-rotating roller of the grinding mill, which is released during grain grinding. Waste water is returned for cooling along the recirculation loop after the grinding mill.

EFFECT: improved flour quality.

1 dwg