基于快速聚沉理论的燃煤颗粒物化学团聚模型  

Modelling of spray agglomeration of particles from coal combustion based on the rapid coagulation theory

作　　者：刘加勋[1] 高继慧[1] 高建民[1] 陈国庆[1] 吴少华[1] 

机构地区：[1]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001

出　　处：《煤炭学报》2009年第10期1388-1393,共6页Journal of China Coal Society

基　　金：国家高技术研究发展计划(863)基金资助项目(2007AA05Z307);"十一五"国家科技支撑计划基金资助项目(2006BAA01B04)

摘　　要：以快速聚沉理论为基础,结合喷雾团聚过程中雾滴和颗粒物的粒子群动力学分析,提出了扩散团聚模型以及喷雾团聚模型.根据模型计算了聚沉速度常数以及不同初始条件对团聚效果的影响.结果表明:当飞灰颗粒直径大于0.1μm时,可以不考虑颗粒的扩散效应;当飞灰颗粒粒径小于0.1μm时,扩散团聚比较明显;在相同雾滴直径时,随着团聚剂溶液流量的增加,团聚效率随之增大;在相同雾化质量的条件下,随着飞灰颗粒直径的增加,团聚率越高;相同飞灰颗粒粒径时,随着雾滴直径的减小,团聚效率升高.Based on the rapid coagulation theory, agglomerating models of fine particles during the diffusion and spray process were developed combining dynamic properties of particles and analysis of the interaction of droplets and particulates. Based on the model, coagulation rate constant and the influences of different original parameters were calculated. The final results show that the diffusion effect on agglomeration is obvious when the particle diame- ters are smaller than 0. 1 microns and if they are larger the diffusion effect need not be considered. Under the condition of the same droplets diameters, the agglomerate efficiency increases with the increase of the agglomerant solution rate. Under the condition of the same atomization quality, the agglomerate efficiency increases with the increase of the particle diameters. Under the same condition of the particle diameters, the agglomerate efficiency increases with the decrease of the droplet diameters.

关 键 词：快速聚沉 煤燃烧 团聚模型 微细颗粒 

分 类 号：TQ534[化学工程—煤化学工程]