CAJ | 학술논문

根据300MW循环流化床（CFB）锅炉现场测试数据并结合以往CFB锅炉传热系数的研究成果，建立了屏式受热面烟气侧的传热模型，包括辐射传热模型和对流传热半经验公式．利用该模型对某300MWCFB锅炉在94％锅炉最大连续蒸发量（BMCR）工况下炉膛内屏式受热面的传热系数进行了计算，分析了屏式受热面管间节距、炉膛温度、工质温度、壁面黑度及烟气速度等因素对传热系数的影响．结果表明：烟气速度、炉膛温度和壁面黑度对传热系数的影响较大，所建立的传热模型能够合理地反映主要因素对CFB锅炉屏式受热面传热的影响．
근거300MW순배류화상（CFB）과로현장측시수거병결합이왕CFB과로전열계수적연구성과，건립료병식수열면연기측적전열모형，포괄복사전열모형화대류전열반경험공식．이용해모형대모300MWCFB과로재94％과로최대련속증발량（BMCR）공황하로당내병식수열면적전열계수진행료계산，분석료병식수열면관간절거、로당온도、공질온도、벽면흑도급연기속도등인소대전열계수적영향．결과표명：연기속도、로당온도화벽면흑도대전열계수적영향교대，소건립적전열모형능구합리지반영주요인소대CFB과로병식수열면전열적영향．
According to the test data obtained on site of a 300 MW CFB boiler and previous research a chievements concerning heat-transfer coefficients of CFB boilers, a heat-transfer model of platen heating surface at flue gas side was established, including a radiation heat-transfer model and a semi-empirical for- mula of convection heat transfer. Based on heat transfer coefficient calculation of platen heating surface on a 300 MW CFB boiler at 94~ boiler maximum continue rate（BMCR） load, the impact of following factors on the heat transfer coefficient was analyzed, such as the tube pitch of platen heating surface, the furnace temperature, the steam temperature, the emissivity of tube wall and the flue gas velocity, etc. Analysis results show that the flue gas velocity, the furnace temperature and the emissivity of tube wall are the leading factors influencing the heat-transfer coefficient. The heat-transfer model can reasonably reflect how the main factors affect the heat transfer of platen heating surface of CFB boilers.