TOWER GRAIN DRYER WITH IMPROVED HEAT RECLAMATION AND COUNTER-FLOW COOLING SECTION Russian patent published in 2018 - IPC F26B17/14 F26B21/04 

FIELD: drying.

SUBSTANCE: invention relates to grain drying towers. Tower dryer comprises a heater and blower separating a heating plenum and a cooling plenum. Dryer is provided with a heat reclamation/heat recycling system and/or counter-flow cooling to reduce the energy requirements of the tower dryer. Heat reclamation system comprises a chamber which is external to the outer wall of the tower and is located at a point along the drying path. Bottom of the chamber is open to the atmosphere. Hot exhaust air enters the heat reclamation chamber at the top of the chamber and is drawn back into the tower by the blower as the exhaust air exits the open bottom of the chamber. In the counter-flow, the walls defining the grain path of the in the cooling section are not air permeable, and air is drawn into the cooling section through outer wall ducts which are closed at the inner wall. Incoming air travels up through heated grain to be warmed, and then enters the plenum through inner wall ducts, which are closed at the outer wall of the tower.

EFFECT: invention reduces energy costs.

14 cl, 19 dwg