关键词: 锥形流化床, 水平射流, 最小流化速度, 最大压降

Abstract: The influences of two sides horizontal jet on the fluidization characteristics of three different-sized particles were studied by using a two-dimensional conical fluidized bed with the size of 160 mm × 300(20) mm× 30 mm (height × width × thickness) and cone angle of 60°. The critical fluidization curve showed that pressure drop increased rapidly with increasing flow rate and decreased slightly after reaching a maximum. On the other hand，the hypothesis of “boiling core” was proposed based on experimental observations，and the change of flow rate with variation of bed height when the particles reached an incipient fluidization state was deducted. Based on the hypothesis，the calculation equation of maximum voltage drop was deducted according to the Ergun equation，and the calculation results showed that the calculated values were slightly higher than the experimental values. In addition，the minimum fluidization velocity of the two-dimensional conical fluidized bed increased with increasing particle size，but increased slightly with increasing filler volume.

Key words: conical fluidized bed, horizontal jet, minimum fluidization velocity, maximum pressure drop