FIELD: process engineering.
SUBSTANCE: invention relates to cement industry. This kiln comprises body, dual drive, slime feed pipe, head to feed fuel and air into kiln, iterative filter-heater, heat exchangers, fire grate-displacing refrigerator, water cooling unit and central lubing system. Body perimeter is composed by multistart helical surface of three or more identical rectangular strips twisted in lengthwise direction relative to lengthwise axis and bent in helical line in crosswise direction at cylindrical mandrel. Sais strips are connected to make three or more helical grooves shaped to curved pockets with centre of curvature inside cross-section of said body and lap joints there inside as screw blades over the entire length of the body from inlet to outlet.
EFFECT: high-intensity heat exchange, simplified operation.
7 dwg
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