SEED AND GRAIN DRYING METHOD AND DEVICE Russian patent published in 2014 - IPC F26B3/14 F26B17/12 

FIELD: heating.

SUBSTANCE: seed and grain drying method, at which they are loaded, gravitationally moved in a downward direction through an upper and lower drying and cooling zones of a drier, ventilated with a drying agent and cooling gas respectively and unloaded. A new feature is that some part of the cooling gas is supplied to the upper drying zone, which is calculated as per the following equation: $$Q_{cool}=Q_1(\frac{t_1-t_{в}}{t_1-2t_0}),$$ where t_B, t₁, t₀ - temperatures of mixture of gases, a drying agent and ambient air respectively, °C, Q₁, Q_cool - flow rate of the drying agent and the cooling gas, which are supplied to the upper zone, m/h; besides, the gas mixture is reversed. The device includes above-drying and under-drying 13 hoppers, upper 2, lower 3 drying and cooling 4 chambers, fans 10, 12 of the drying agent and the cooling gas, furnace 11, means of material loading 15 and unloading 14. A new feature in the device is that it is equipped with air duct 6 for connection of upper drying chamber 2 to cooling gas fan 12 and with casing 19 to perform a reversing motion of the mixture of gases of the drying agent with the cooling gas to upper drying chamber 2.

EFFECT: drying efficiency improvement.

2 cl, 1 dwg