High-low differential bed air distribution structure

The utility model discloses a high-low differential bed air distribution structure. The structure comprises a main bed, a secondary bed air chamber, a buried pipe and a partition, and is characterized in that the 300-1000mm height difference between the main bed and the secondary bed air chamber is good for the circulating of the material, and one partition is connected between the main bed and the secondary bed air chamber, a reflowing hole is formed at the lower end of the partition, and the buried pipe is arranged at the upper end of the secondary bed air chamber. The air distribution structure disclosed by the utility model has the technical effect that the fluidization of different material particle sizes are finished through the structure of the main bed and the secondary bed air chamber, and the requirement on different fluidization rate difference of the main bed and the secondary bed air chamber is satisfied, thereby realizing the circulating combustion between the main bed and the secondary bed air