摘要
本文从试验和数模计算两个方面研究了床面粒子抛撒对床内传热传质的影响.床面粒子抛撒量随着流化速度的增加而增加,同时也随床层高度的增高而增加.区间床面粒子抛撒量约占区间总传质量的50%～65%,因而对床内过程有较大影响.本文利用戎-范的浅床数模,并考虑区间床面粒子的抛撒,引出了一个动态数模,采用Sincover和Madson提出的“在线法”解非线性偏微分方程组,提高了精度.计算结果与试验结果吻合较好.
The effects of particles projection from a fluidized bed surface on the heat and mass transfer between two isothermal regions was investigated through experiment and mathematical modelling. The amount of particles projection increased with the increase of superficial velocity and the increase of the bed height. The amount of particles projection between the two regions was 50%-65% of the total amount of the mass transfer in the bed.
On the basis of the Rong-Fan shallow bed mathematical model and experimental conditions, a dynamic model was proposed. The 'On Line Method' derived by R. F. Sincover and N. K. Madson was used to solve the partial differentia] equations. The calculated results were in better agreement with the ex-perimental values.
出处
《化工学报》
EI
CAS
CSCD
北大核心
1991年第1期59-65,共7页
CIESC Journal
