Alumina calcining furnace feeding heat exchange device capable of improving mixing degree of material and hot air

Abstract

The utility model discloses an alumina calcination furnace feeding heat exchange device that can improve the mixing degree of material and hot air, which comprises a venturi dryer, the venturi dryer comprises a venturi throat pipe, the upper part of the venturi throat pipe is connected with a drying part, and the lower part is connected with a gas feeding part, the side wall of the drying part close to the venturi throat pipe is vertically connected with a spiral feeder, a cyclone flow guide structure is arranged in the venturi throat pipe, the cyclone flow guide structure comprises a plurality of flow guide blades, the plurality of flow guide blades are uniformly and interval arranged on the inner wall circumference of the venturi throat pipe and are all inclined to the clockwise direction or the counterclockwise direction of the venturi throat pipe, the device forcibly converts the axial flow of the hot air entering the venturi throat pipe into a rotating upward airflow by arranging the plurality of inclined flow guide blades, improves the wind speed and the residence time of the material, prolongs the mixing time of the material and the hot air, improves the mixing uniformity of the material and the hot air, and improves the heat exchange effect.

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