摘要
快速流态化作为一种新型高效的气固接触技术,现广泛应用于各行各业。以快速流态化统一动力学模型为基础,分别探究了床料物性参数、操作运行条件以及床层直径大小对床层上部稀相区固体颗粒浓度分布规律的影响,并对相关结果进行了分析,以期为快速流态化统一动力学模型的工程推广应用提供进一步的指导。结果表明:在其他参数不变的条件下,快速床上部稀相固含率随颗粒密度的增大而减小;随颗粒直径的增大而减小;随床层直径的增大而增大;随固体循环流率的增大而增大;随操作风速的增大而减小。
As a new and efficient gas-solid contacting technology,fast fluidization has been applied in many fields.Based on the type-A-choking-oriented unified model for fast fluidization dynamics,we study the influences of solids characteristics,operating conditions and riser diameter on the solids holdup in the upper dilute region in fast fluidized beds,respectively.The results show that solids holdup in the upper dilute region increases with increasing solids diameter and solids density.When the circulated solid flux increases or the superficial gas velocity decreases,solids holdup in the upper dilute region increases.The solids holdup in the upper dilute region should be greater in a larger riser than in a smaller one.We hope the above results can give some instructions to the type-A-choking-oriented unified model to be used for engineering practice.
作者
熊加恩
郭道川
范浩杰
章明川
XIONG Jia’en;GUO Daochuan;FAN Haojie;ZHANG Mingchuan(SJTU-Paris Tech Elite Institute of Technology,Shanghai Jiaotong University,Shanghai 200240,China;School of Mechanical Engineering,Shanghai Jiaotong University,Shanghai 200240,China)
出处
《锅炉技术》
北大核心
2019年第1期32-39,60,共9页
Boiler Technology
