Abstract: In this paper Markov theory is employed to discuss the behavior of bubbles in gas-liquid-solid fluidized bed. The phase holdu pdistribution is thought as a stochastic probability, A simplified stochastic model of gas holdup distribution is developed. The calculation relation of model parameters in the stochastic model are analysed according to the physical mechanism. In order to deeply study the phase holdup distribution of three-phase fluidized bed by the stochastic model, the RTD of gas or solid phases should be given as follows: The results show that the calculation values of εg from the stochastic models were very close to the experimental data.

摘要： 本文利用Markov过程原理获得了描述三相流化床中局部相含率的随机模型,并进行了实验验证,发现拟合很好.