300MW机组循环流化床锅炉外置床运行特性试验

Test on operation characteristics of fluidized bed heat exchanger of a 300 MW unit circulating fluidized bed boiler
HUANG Yuansheng1, ZHANG Lijun1, WANG Hu2, LU Xiaofeng3
第48卷第8期 2019年8月
热力发电 THERMAL POWER GENERATION
Vol.48 No.8 Au各 2019
300 MW机组循环流化床锅炉
外置床运行特性试验
黄元生1,张利君1,王虎彳，卢啸风彳
(1.华北电力大学经济与管理学院，河北保定071003; 2.国家能源集团循环流化床技术研发中心，陕西 西安710065;
设计时应重点考虑的关键问题之一Bl随着我国 CFB锅炉进入超临界时代，超(超)临界CFB锅
炉外置床内的气固流动、传热传质以及吸热份额等
运行特性引起高度关注BQ］。
的循环灰流量不同；通过建立外置床平衡方程或者直接测量外置床烟气成分均可获得满足
工程精度的外置床内燃烧释放热量。该研究结果可为超(超)临界CFB锅炉外置床设计与 运行提供参考。
［关键词］CFB锅炉；外置床；热力参数；烟气成分；运行特性；燃烧特性；循环灰流量 ［中图分类号］TK229.6 ［文献标识码］A ［DOI 编号］10.19666/j.rlfa.201904055
3.重庆大学能源与动力工程学院，重庆4台燃用贫煤的300 MW机组循环流化床(CFB)锅炉外置床热力参数及烟气成分
基础上，对大型CFB锅炉外置床运行特性进行了试验研究。结果表明：燃烧贫煤的CFB
锅炉外置床内存在燃烧现象；不同类型的外置床内吸热份额、燃烧释放热量及流经外置床
循环流化床(CFB)锅炉具有燃料适应性广和
污染物排放量低的特点，是公认的具有商业应用价
值的清洁煤发电技术之一【I】。为了更好地平衡炉内 床温和控制蒸汽参数，锅炉可采用外置床设计，在 床温控制、污染物排放控制、燃烧与脱硫效率方面 均具有较明显的优势ZU外置床内受热面的吸热份
额在某种程度上代表了外置床对炉内温度调节能力 的大小，是大型CFB锅炉及未来超超临界CFB锅炉
3. School ofEnergy and Power Engineering, Chongqing University Chongqing 400044, China)
Abstract: On the basis of measuring the thermodynamic parameters and flue gas components of the fluidized bed heat exchanger (FBHE) of a 300 MW CFB boiler fueled by lean coal under dififerent thennal loads, the actual operation characteristics of the FBHE were experimentally investigated. The results indicate that, post-combustion phenomenon exists in the FBHE of the CFB boiler firing lean coal. The heat absorption shares of the different FBHEs are quite different from each other, as well as heat released by char combustion and ash flow rates through the FBHE. The heat release by char combustion in the FBHE can be obtained by establishing equilibrium equation in the FBHE or directly measuring the flue gas composition at outlet of the FBHEs. These results can provide referential materials for design and operation of the FBHE in large-scale CFB boilers. Key words: CFB boiler, fluidized bed heat exchanger, thermodynamic parameter, flue gas component, operation characteristics, combustion performance, circulating ash flow rate
(1. School ofEconomics and Management, North Electric Power University Baoding 071003, China; 2. CHN Energy CFB Research and Development Center, Xi'an 710065, China;
［引用本文格式］黄元生，张利君，王虎，等.300 MW机组循环流化床锅炉外置床运行特性试验出.热力发电，2019, 48(8): 101-105. HUANG Yuansheng, ZHANG Lijun, WANG Hu, et al. Test on operation characteristics of fluidized bed heat exchanger of a 300 MW unit circulating fluidized bed boiler［J］. Thermal Power Generation, 2019,48(8): 101-105.