The utility model relates to the technical field of
rotary kiln combustion-supporting, in particular to a
rotary kiln combustion-supporting air inlet structure, which comprises a heat exchange bin, a plurality of
heat conducting pipes are fixedly installed inside the heat exchange bin, a gas distribution
assembly is arranged at the lower end of the heat exchange bin, and a stirring
assembly is arranged inside the heat exchange bin, wherein the stirring
assembly comprises a supporting ring fixedly installed at the upper end inside the heat exchange bin, and stirring blades are fixedly installed on the outer surface of the rotating frame. In the utility model, the secondary air flows through the plurality of
heat conducting pipes, so that the pulverized
coal exchanges heat when flowing through the heat exchange bin, part of the heat in the secondary air preliminarily heats the pulverized
coal, the heat of the secondary air is fully utilized, the heated pulverized
coal is then mixed into the
tertiary air, the
tertiary air heats the pulverized coal, the temperature of the pulverized coal before
combustion is further improved, the pulverized coal is more convenient to burn, the time required for heating the pulverized coal inside the
combustion chamber is reduced, the influence of the time on combustion is reduced, and the combustion effect of the material is improved.