摘要
温度是燃煤电站锅炉安全运行中最重要的参数之一,锅炉的高温过热器所处环境十分恶劣,需要承受很高的温度和压力,其壁面温度的精确测量一直都是锅炉技术中的难点。基于红外图像法获取壁面温度的原理,考虑了发射率和飞灰等颗粒物对温度测量的影响,针对测量仪器高温和粉尘防护的需求,开发了一种高温过热器壁面温度的非接触式在线测量系统。成功将开发的测温系统应用于某电厂1000 MW机组,实现了第二屏高温过热器第一根管道壁面温度的测量,并对机组从冷启动到并网发电过程中过热器壁面温度变化进行了分析讨论。结果表明:红外测温法可有效实现高温过热器壁面温度测量。
Temperature is one of the most important parameters for the safe boiler operation in coal-fired power station.The superheater of the boiler works in a very harsh environment and withstands high temperature and high pressure.The accurate measurement of its tube wall temperature has always been a difficult issue in boiler technology.Based on the principle of infrared imaging temperature measurement,a non-contact on-line measurement system is developed for measuring the superheater tube wall temperature with the impacts of the emissivity and fly ash on the measurement corrected.Taking the influence of environmental factors inside and outside the furnace on the measurement system into consideration,a cooling system is integrated to ensure the measurement system works regularly.The developed temperature measurement system is successfully applied to a 1000 MW generator unit,where the first tube wall surface temperature measurement of the second platen superheater is realized.The temperature change of the superheater tube wall surface when the unit starts from cold state to grid-connected power generation is recorded and analyzed.The results show that the developed infrared temperature measurement system can effectively achieve the superheater tube wall temperature measurement.
作者
王煜伟
张禹
任建新
李健
许传龙
WANG Yuwei;ZHANG Yu;REN Jianxin;LI Jian;XU Chuanlong(Jianbi Power Plant of China Energy Group, Zhenjiang 212006, China;School of Energy and Environment, Southeast University, Nanjing 210096, China)
出处
《锅炉技术》
北大核心
2020年第5期5-10,共6页
Boiler Technology
基金
国家能源集团总部科技项目(GJNY-18-01)。
关键词
过热器
管壁温度
在线测量
红外辐射
superheater
tube wall temperature
on-line measurement
infrared radiation
