增压富氧燃烧流化床炉内传热特性  

Heat Transfer Characteristics in a Pressurized Oxy-fuel Fluidized Bed Boiler

作　　者：王春波[1] 霍志红[2] 邢晓娜[1] 

机构地区：[1]华北电力大学能源动力与机械工程学院,保定071003 [2]河北省电力勘测设计研究院,石家庄050031

出　　处：《动力工程学报》2012年第3期182-186,共5页Journal of Chinese Society of Power Engineering

基　　金：教育部新世纪优秀人才支持计划资助项目(NCET-08-0770);中央高校基本科研业务费专项(重点)资金资助项目(11ZG12)

摘　　要：建立了增压富氧燃烧流化床锅炉炉内传热模型.通过模型计算,分析了颗粒粒径、空隙率、床层温度及系统压力等因素对炉内传热特性的影响.结果表明:随着颗粒粒径增大,传热系数减小;随着空隙率增大,传热系数减小;随着温度升高,传热系数增大;随着压力升高,传热系数增大,但增加的幅度明显变小,说明当压力升高到一定程度时,继续升高压力对传热没有太大影响.A model of pressurized oxy-fuel fluidized bed boiler was established,with which the in-furnace heat-transfer characteristics were studied by analyzing relevant influencing factors such as the particle size,the porosity,the bed temperature and the pressure,etc.Results show that the heat-transfer coefficient increases with reducing particle size,decreasing porosity,rising temperature and elevating pressure.However,when the pressure gets up to a certain value,the heat-transfer coefficient will tend to remain stable even if the pressure continues to be elevated.

关 键 词：增压富氧燃烧 流化床锅炉 传热系数 模型 

分 类 号：TK229.66[动力工程及工程热物理—动力机械及工程]