1000MW超超临界锅炉水冷壁工质温度计算研究  

Study of the Temperature Calculation of the Working Medium in the Water Walls of a 1000 MW Ultra-supercritical Boiler

作　　者：滕叶[1] 张忠孝[1] 董建聪[2] 刘旭聃 

机构地区：[1]上海理工大学能源与动力工程学院,上海200090 [2]上海交通大学机械与动力工程学院,上海200240

出　　处：《热能动力工程》2014年第6期714-718,763,共5页Journal of Engineering for Thermal Energy and Power

基　　金：国家科技支撑计划资助项目(2012BAA12B02)

摘　　要：以某台1 000 MW超超临界塔式锅炉作为研究对象,采用分区计算简化高参数超超临界锅炉炉内对流与辐射传热模型,分析不同锅炉负荷条件下膜式水冷壁工质温度的分布规律,将计算结果与实测数据进行比较,最大偏差为1.66%,认为该模型可以预测水冷壁工质温度分布。研究表明:超临界压力下工质由液态直接过渡为汽态,相变区内工质温度变化很小;亚临界压力下存在汽液共存区,其中的工质温度保持不变,当负荷达到662 MW时工质温度为362.5℃,当负荷达到507 MW时工质温度为344.8℃;计算得到工质温度波动在2.8℃以内,螺旋管圈表现出优越的平衡燃烧扰动能力,水冷壁出口最高工质温度为458.0℃。With a 1000 MW ultra-supercritical tower type boiler serving as the object of study,simplified were the aerodynamic and radiation heat transfer model for furnaces under ultra-supercritical pressures by using a zone division calculation method.The distribution of medium 's temperature was calculated under different boiler load conditions.Compared with the measured data,the maximum deviation is 1.66%,indicating that the model can be used to predict the distribution of the working medium temperature.The research results show that the working medium under the supercritical pressure changes directly from the liquid to a vapor state,working medium temperature changes slowly in phase transition zone.There is gas-liquid coexistence zone under subcritical pressure,in which state the working medium temperature remains constant.The saturated water and steam temperature is 362.5 ℃ at the load of 662 MW and 344.8 ℃ at the load of 507 MW.The fluctuation of the working medium temperature is within a range of 2.8℃ and the spiral coil tubes exhibit an excellent ability to withstand any disturbance in combustion.The highest steam temperature at the outlet of the water walls is 458.0 ℃.Furthermore,to control the working medium temperature at the outlet of water walls will be favorable to the safety of the water walls.

关 键 词：超超临界锅炉 炉膛传热 膜式水冷壁 工质温度 

分 类 号：TK229.2[动力工程及工程热物理—动力机械及工程]