临界流化风速是沸腾床一个很重要的流体动力特性参数,目前它的计算公式很多,这些公式的实验依据绝大部分是用粒度小,较均匀的料层所得,对于沸腾燃烧锅炉中宽筛分混合物料的沸腾床不一定适用. 在沸腾燃烧锅炉中,为了计算宽筛分料层的临界流化风速,必须应用平均颗粒直径.当前应用最普遍的是颗粒重量百分比平均直径与颗粒比表面积平均直径,但是对于同一 Critical fluidization velocity is a very important hydrodynamic characteristic parameter of fluidized bed. At present, it has many formulas. The experimental basis of these formulas is mostly obtained by using small particle size and uniform material layer. For the wide-screen In boiling boiler boilers, the average particle diameter must be applied in order to calculate the critical fluidization velocity of the wide-screen media. The most common applications at present are the ratio of the average particle weight percent diameter to the particle specific surface area Average diameter, but for the same