摘要
针对燃煤电厂锅炉因受热面积灰结渣而造成机组安全性和经济性下降问题,进行受热面积灰结渣监测研究。基于广东某300 MW机组,运用热平衡和传热原理建立了一套燃煤电厂锅炉受热面积灰结渣的监测模型。模型运行前对监测模型进行敏感性分析。结果表明:在负荷、燃煤低位发热量、过量空气系数处于稳定时,模型能获得较好的监测效果。输入机组DCS系统的热工参数,计算锅炉各对流受热面的清洁因子,以监测对流受热面积灰结渣的严重程度。将监测结果结合实际运行要求,可在线得到合理的吹灰策略。
In coal-fired power plant, the fouling and slagging on the heating surface cause the efficiency decline, even jeopardize the boiler＇ s safety. A thermal calculation model was built to monitor the fouling and slagging of one 300 MW output boiler in GuangDong. In this model, the thermal balance and heat transfer theory have been used and sensitivity analyses of four main parameters were made before the run of the model. The results show that the model works well on condition that the load, LHV of the fuel and the excess air coefficient are steady. By using DCS operational and measured data, the cleanness factor was introduced as an indicator for fouling and slagging on the convection heating surfaces. The model seems to be a promising tool for real-time monitoring of the fouling and slagging, when combined with the operational demands, can be used to guide the sootblowing in real time.
作者
黎华
张振顶
谭超
刘定波
叶向荣
卢志民
姚顺春
LI Hua ZHANG Zhending TAN Chao LIU Dingbo YE Xiangrong LU Zhimin YAO Shunchun(Guangzhou Special Pressure Equipment Inspection and Research Institute, Guangzhou 510663,China Power Electric College, South China University of Technology, Guangzhou 510640, China Xi＇ an Thermal Power Research Institute Co. , Ltd. , Xi＇ an 710032, China)
出处
《锅炉技术》
北大核心
2017年第5期46-52,共7页
Boiler Technology
基金
国家自然科学基金(51676073)
"广东特支计划"科技青年拔尖人才(2014TQ01N334)
关键词
锅炉受热面
积灰结渣
在线监测
热力计算
清洁因子
heat transferring surface
fouling and slagging
online monitoring
heating calculation
clean factor
