北京科技大学赵洪亮团队报道了CPFD法模拟铝土矿循环流化焙烧过程中的气固流动。相关研究成果发表在2023年12月22日出版的《颗粒学报》。

采用计算粒子流体动力学方法对循环流化床(CFB)进行了全循环数值模拟。探讨了有无二次风、不同二次风位置和不同二次风比对气固流动特性的影响。结果表明，二次风的存在使流化床中颗粒的速度分布形成了核心环形结构，增强了颗粒分布的均匀性和流化的稳定性。

二次风的位置和比例对流化床中的颗粒分布、颗粒流速和气体流速有显著影响。二次风位置和比例最优，循环流化床中颗粒、颗粒流量和空气流量分布均匀，气固流动状态良好，循环流化床能够稳定运行。

附：英文原文

Title: Numerical simulation on gas-solid flow during circulating fluidized roasting of bauxite by a CPFD method

Author: Chengming Xie , Rongbin Li , Qijin Wei , Fengqin Liu , Hongliang Zhao , Yongmin Zhang , Hong Yong Sohn 

Issue&Volume: 2023/12/22

Abstract: A full-cycle numerical simulation of a circulating fluidized bed (CFB) by the use of the computational particle fluid dynamics (CPFD) method has been developed. The effects of the presence or absence of the secondary air, different secondary air positions and different secondary air ratios on the gas-solid flow characteristics were explored. The results show that the presence of the secondary air makes a core-annular structure of the velocity distribution of particles in the fluidized bed, which enhances the uniformity of particles distribution and the stability of fluidization. The position and the ratio of the secondary air have a significant impact on the particle distribution, particle flow rate and gas flow rate in the fluidized bed. The secondary air position and ratio are optimal, the particles, particle flow rate and air flow rate in the CFB are evenly distributed, the gas-solid flow state is good, and the CFB can operate stably.

DOI: 10.1016/j.partic.2023.12.007

Source: https://www.sciencedirect.com/science/article/abs/pii/S1674200123003243