摘要
在前人研究的基础上,进一步地考虑了离心流化床在初始流化后气速增大引起的床层膨胀,通过引入气速与空隙率变化函数关系建立了离心力场气固流态化的动力学模型,得出了空隙率和床层膨胀关系式,从而得出床层压降的计算公式。理论预测的针对不同转速、不同颗粒的床层压降与临界速度的关系与实验数据吻合良好,能更准确地预测实验结果。
Based on previous researches, a further consideration was made of the inflation of bed layer induced with the increase of gas velocity after the initial fluidization of the centrifugal fluidized beds. A dynamic model was founded of the gas-solid fluidization of the centrifugal force field by introducing the function relation of gas velocity and void rate change, and the correlative equation of void rate and inflation of bed layer was derived, and the calculation equation of the pressure drop of bed layer was obtained. The relations predicted with theory for various rotating speeds, for the bed layer pressure drop of various-sized particles, and for the critical speeds were in a good agreement with experimental data, the equation could more correctly predict experimental result.
出处
《化工机械》
CAS
2005年第4期211-213,247,共4页
Chemical Engineering & Machinery
关键词
离心流化床
流态化
压降
动力学
Centrifugal Fluidized Bed, Fluidization, Pressure Drop, Dynamics
