METHOD AND DEVICE FOR AUTOMATIC CONTROL OF DRYING Russian patent published in 2007 - IPC F26B25/22 

FIELD: drying.

SUBSTANCE: method comprises preliminary drying of initial product in the zone of the preliminary drying by heated air, drying the product by overheated steam in the drying zone, measuring flow rate and humidity of the initial product, flow rate and temperature of the preliminary dried product entering the drying zone thus correcting the flow rate and temperature of the overheated steam at the entrance to this zone, flow rate and humidity of the dried product, flow rate and temperature of the overheated steam at the entrance to the drying zone, flow rate of the air supplied for preliminary drying and humidity of air at the exit from the preliminary drying zone, and determining excess portion of the overheated steam from the current data on the flow rate of the preliminary dried and dried products. The device comprises heat pump plant composed of compressor, condenser, heat control valve, two-way switch, and evaporator that has operation and reserve section.

EFFECT: enhanced efficiency and expanded functional capabilities.