东南大学学报（自然科学版）2012，Vol.42Issue(3)：447-452,6.DOI:10.3969/j.issn.1001-0505.2012.03.010
固废流化床异型颗粒与床料共流化特性
Co-fluidization of irregular particles with bed material in solid waste fluidized bed
摘要
Abstract
Co-fluidization characteristics of irregular particles with bed material have been investigated. Experimental were carried out in a solid waste fluidized bed with a cross section of 0.2 m × 0.2 m and a height of 1.2 m. Four particles with different sharps, sizes and densities were used as simulative solid waste, and silica sand was employed as fluidization medium. The pressure drop, flow pattern and minimum fluidization velocity (Umf) under different operating condition were tested through pressure signal and fluidization images. Correlation for predicting the Umf was also developed. The results show that with mixture of irregular property particles and bed material, the pressure curve measured with increasing flow rate is remarkably fluctuant and always results in underestimation of Uml value. While like fluidization of pure regular particles, the pressure curve with decreasing flow rate is smooth and reasonable to determine the value of Uml. Besides, Umf is found to be increased with the increasing of volume proportion and effective particle diameter density, but it is not affected by the change of static bed height. Comparisons show that predicted Umf by the present correlation corresponds well to the experimental data and those in literatures. It is found that the correlation can satisfactorily predict Um, in fluidizing of irregular particles with bed material with a mean relative error of 14. 7%.关键词
流化床/固体废弃物/气固流动/异型颗粒/最小流化速度Key words
fluidized bed/ solid waste/ gas-solid flow/ irregular particles/ minimum fluidization velocity分类
能源科技引用本文复制引用
邵应娟,胡颢,金保昇,钟文琪,陈曦,任冰,沙春发..固废流化床异型颗粒与床料共流化特性[J].东南大学学报（自然科学版）,2012,42(3):447-452,6.基金项目
国家重点基础研究发展计划(973计划)资助项目(2011CB201505)、国家自然科学基金资助项目(50976025). （973计划）
