▎ 摘　　要

NOVELTY - The utility model model claims a denitration system for calcining aluminium oxide, relating to the field of denitration device, comprising a heat cavity, the inner part of the heat exchange cavity sleeved with a heat conducting oil pipe extending to the outer side of two ends of the heat exchange cavity the outer wall of the heat conducting oil pipe is sleeved with a sealing plate fixedly connected with the inner wall of the heat exchange cavity one side of the sealing plate located on the outer wall of the heat conducting oil pipe is sleeved with a graphene sheet, the other side of the sealing plate located on the outer wall of the heat conducting oil pipe is sleeved with a spiral pipe, one end of the spiral pipe is connected with an air inlet bucket passing through the sealing plate. The utility model model is provided with a sealing plate, graphene sheet, graphene strip spiral pipe, conduit, the heat conducting oil pipe and the air inlet hopper are matched with each other, the flue gas entering the heat exchange cavity blocked, the cross section area of the flue gas flow path is reduced, the flue gas is driven to have a long time in the heat exchange cavity so that the heat in the flue gas is fully connected with the heat conducting oil pipe contact fully using the heat in the flue gas.