高技术通讯2025，Vol.35Issue(2)：214-226,13.DOI:10.3772/j.issn.1002-0470.2025.02.011
印染污泥-煤粉混烧流化床锅炉内颗粒流化行为数值模拟研究
Numerical simulation of particle fluidization behaviors in a dyeing sludge-coal powder mixing fluidized bed boiler
摘要
Abstract
A simulation study based on computational fluid dynamics-discrete element method(CFD-DEM)is carried out to investigate the characteristics of gas-solid two-phase flow dynamics in a buried tube fluidised bed containing printing and dyeing sludge and coal powder particles.The mixing index,velocity distribution,number ratio,solid content distribution,and average kinetic energy distribution of the particles in the fluidisation process are statistical-ly analyzed and discussed.The experimetal results show that the separation of coal sludge particles is intensified with the increase of gas velocity when the initial top sludge is filled down with coal powder,and the phenomenon of localised complete separation occurs with too large gas velocity.When the gas velocity reaches 3.0m·s-1,the separation phenomenon is less likely to occur when the bed is filled with mixed coal sludge compared with layered filling.When changing the ratio of the number of the two types of particles in the fluidised bed,it is found that in-creasing the number of coal powder could lead to a more uniform sludge distribution,and that the average kinetic energy of the particles above the buried tube differes greatly from that below.关键词
气固两相流/计算流体力学-离散单元法/流化床/印染污泥/混合Key words
gas-solid flow/computational fluid dynamics-discrete element method(CFD-DEM)/fluidized bed/dyeing sludge/mixing引用本文复制引用
郑小腾,陈星晨,余焕伟,竺哲明,杜锡勇,许磊..印染污泥-煤粉混烧流化床锅炉内颗粒流化行为数值模拟研究[J].高技术通讯,2025,35(2):214-226,13.基金项目
国家自然科学基金(52205172)和浙江省自然科学基金(LY23E050015,LTGS24E010002)资助项目. （52205172）
