Direct contact rotary tubular heat exchanger - has cylindrical turning scoops with section cut away on inner surface of tube

摘要

A tubular exchanger for direct contact between a gas and a granular solid has scoops for turning the solid that are cylindrical with circular cross section of radius between 0.15 and 0.33 the inner radius of the rotary tube. The scoops have an opening that forms an angle of between 130 and 160 degrees C at the centre. Used in the mining industry for cooling, drying, etc., of granular solid materials.