摘要
使用多相流模型计算了灰熔聚流态化粉煤气化器中双组分的射流穿透深度。较科学地讨论了模拟计算中射流边界的定义；提出在工业气化器的操作条件下，用基于颗粒个数的算术平均法求混合物的平均直径，从而将双组分问题简化为单组分的计算，求出的射流穿透深度与实验值或文献值比较吻合，并发现床层表观气速的影响较大。
The fluidization of binary mixture( fine coal powders and large ash partiles)in an ash-agglomerating coal gasifier was simulated by using the multiphase medel which was solved bythe modified IPSA method. The definition of the boundary of the computed jet was discussedrigorously. The arithmetical mean based on particle number,was adopted to represent themean diameter of the mixture under the operation condition of the industrial plant.Thus theproject of simulating the flow in the fluidized bed containing binary components was simplifiedto that of the single component.The computed jet penetration heights of the binary mixture inthe bed were reasonably compared with experiment's or reported data. It was also found thatthe superficial gas velocity of the bed has significant influence on the jet penetration heightwhich was not reported previously.
出处
《化学反应工程与工艺》
CAS
CSCD
北大核心
1995年第1期65-72,共8页
Chemical Reaction Engineering and Technology
关键词
射流穿透深度
多相流模型
混合物
物料输送
Fluidization,Jet penetration height, Arithmetical mean, Harmonic mean,Multiphase model
