FIELD: boiler equipment for air heating by flue gases. SUBSTANCE: the gas and air heat-exchange chambers, with holes for outflow of heat-transfer agent with spring-loaded locking members made between them, are provided with gratings, each feed hopper is provided with a distribution device made in the form of a horizontal slotted inlet port for inlet of air mixture and an outlet port for outlet of air located in the upper section of the opposite sides of the feed hopper; the locking members are positioned on the side of the air heat-exchange chamber, each of them is spring-loaded. EFFECT: prevented removal of fine-grained particles, uniform volume concentration of heat-transfer agent in all chambers. 4 cl, 3 dwg
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