Abstract: This paper deals with a computing method for the design of the commercial rotary driers. The method has been proven in certain commercial rotary driers for the drying of different complex fertilizers. In the study of the heat transfer for particles, to be dried, a volume distribution frequency function of particle groups is introduced for the estimation of the interactions among particles during heat transfer. Parameters of this function are determined by employing a parameter estimation technique. Data collected in a pilot rotary drier serve for the estimation of the mentioned parameters. The suspension time of a particle in a rotary drier is defined to be equal to the drying time of the particle. To obtain the suspension time, mathematical methods, Monte Carlo method and Markov chain inclusive, are applied to simulate particle group transfer in the rotary drier.

摘要： 本文介绍了一个计算工业规模的回转筒干燥机的方法.此方法已在干燥复合肥料的回转筒中得到了验证.在讨论回转筒中颗粒的干燥传热过程时,采用了颗粒群为容积分布密度函数来估计颗粒间传热过程的相互影响,并且用中间试验的实测数据对该密度函数的四个参数进行了参数估计.又定义颗粒的悬浮态时间作为颗粒的干燥时间,为求取悬浮态时间,应用了蒙特卡罗法,马尔可夫链等数学方法来模拟在回转筒中颗粒群的传输过程.