动力工程学报
動力工程學報
동력공정학보
JOURNAL OF POWER ENGINEERING
2012年
3期
182-186
,共5页
增压富氧燃烧%流化床锅炉%传热系数%模型
增壓富氧燃燒%流化床鍋爐%傳熱繫數%模型
증압부양연소%류화상과로%전열계수%모형
pressurized oxy-fuel combustion%fluidized bed boiler%heat-transfer coefficient%model
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.
建立瞭增壓富氧燃燒流化床鍋爐爐內傳熱模型.通過模型計算,分析瞭顆粒粒徑、空隙率、床層溫度及繫統壓力等因素對爐內傳熱特性的影響.結果錶明：隨著顆粒粒徑增大,傳熱繫數減小;隨著空隙率增大,傳熱繫數減小;隨著溫度升高,傳熱繫數增大;隨著壓力升高,傳熱繫數增大,但增加的幅度明顯變小,說明噹壓力升高到一定程度時,繼續升高壓力對傳熱沒有太大影響.
건립료증압부양연소류화상과로로내전열모형.통과모형계산,분석료과립립경、공극솔、상층온도급계통압력등인소대로내전열특성적영향.결과표명：수착과립립경증대,전열계수감소;수착공극솔증대,전열계수감소;수착온도승고,전열계수증대;수착압력승고,전열계수증대,단증가적폭도명현변소,설명당압력승고도일정정도시,계속승고압력대전열몰유태대영향.
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.
