600MW超临界循环流化床锅炉屏式受热面水动力及吸热量特性研究  

Research on Hydrodynamic and Heat Absorption Characteristics of Panel Heating Surface of the 600MW Supercritical CFB Boiler

作　　者：辛胜伟 牛田田 张伟强 王虎 杨冬[2] 谢国威 顾从阳 杜佳军 XIN Shengwei;NIU Tiantian;ZHANG Weiqiang;WANG Hu;YANG Dong;XIE Guowei;GU Congyang;DU Jiajun(National Energy Group CFB Technology R&D Center,Xi'an 710065,China;State Key Laboratory of Multiphase Flow in Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China;China Huaneng Clean Energy Research Institute,Xi'an 710049,China)

机构地区：[1]国家能源集团循环流化床技术研发中心,西安710065 [2]西安交通大学动力工程多相流国家重点实验室,西安710049 [3]中国华能集团清洁能源技术研究院有限公司,西安710049

出　　处：《动力工程学报》2022年第8期707-714,共8页Journal of Chinese Society of Power Engineering

基　　金：国家重点研发计划资助项目(2016YFB0600201);2030重大项目先导项目(GJNY2030XDXM-19)。

摘　　要：针对高参数循环流化床(CFB)锅炉高温受热面热偏差特性直接影响锅炉安全运行的问题,根据超临界CFB锅炉炉膛内屏式过热器建立的复杂流动网络系统的数学模型以及吸热量模型,对某600 MW超临界CFB锅炉满负荷以及100 MW负荷2种不同运行工况下压降、质量流速分布、出口汽温分布以及沿工质流动方向壁温分布特性进行了计算分析,并进一步计算得到受热面吸热量分布。结果表明:屏式受热面在600 MW以及100 MW负荷下质量流速偏差分别为12.71%和13.96%,全屏出口汽温偏差分别为33 K和58.4 K,偏差均在安全范围内。600 MW负荷下,最高外壁温度为616.5℃,在材料允许范围内,吸热量分布呈靠近侧墙水冷壁及炉膛中心线处低、受热面中间处高的分布趋势。Aiming at the problem that the thermal deviation characteristics of high temperature heating surface in high parameter circulating fluidized bed(CFB) boiler directly affect the safe operation, according to the mathematical model and heat absorption model of the complex flow network system established by the platen superheater in the furnace of supercritical CFB boiler, the characteristics of pressure drop, flow distribution, outlet steam temperature distribution, wall temperature distribution along the working medium flow direction and the heat absorption distribution were calculated and analyzed for the 600 MW supercritical CFB boiler under full load and 100 MW operating conditions.Results show that the flow deviations are 12.71% and 13.96% respectively, and the exit steam temperature deviations of the full screen are 33 K and 58.4 K in 600 MW and 100 MW loads, which are all within a safe range. The maximum outer wall temperature in 600 MW load is 616.5 ℃, which is within the allowable range of materials. The heat absorption distribution tends low near the side water wall and the furnace center line, and high at the middle of the heating surface.

关 键 词：超临界CFB锅炉 屏式受热面 流量分布 出口汽温 吸热量 

分 类 号：TK229[动力工程及工程热物理—动力机械及工程]