The utility model discloses a
combustion-supporting air inlet structure of a
rotary kiln, and relates to the technical field of rotary kilns. The device comprises a fixing plate and a
centrifugal fan, an air inlet
assembly is arranged on the fixing plate, the air inlet
assembly comprises a flow dividing disc fixedly connected to the side, away from the
centrifugal fan, of the fixing plate and a sleeve penetrating through the fixing plate, and the flow dividing disc is fixedly communicated with a plurality of telescopic joints through
branch pipes. And the interior of the sleeve is in threaded connection with a
threaded rod, and a pretreatment
assembly is arranged on the side, away from the fixing plate, of the
centrifugal fan. The movable plate and the air inlet spray head are driven to move through the sleeve and the
threaded rod, so that the air inlet position of the
rotary kiln is adjusted, the problem that the air inlet position is inconvenient to adjust in the prior art is solved,
combustion-supporting air is dehumidified through the filling frame, the
combustion-supporting air is oxygenated and preheated through the
oxygenation pipe and the serpentine
pipe, and the air inlet position is adjusted. The problem that combustion-supporting air is inconvenient to pretreat in the prior art is solved.