摘要
针对高温炉膛燃烧温度分布检测很难采用热电偶和辐射高温计测量,以及用红外热像仪测量时结果偏差大、易受环境影响等问题,以彩色CMOS作为可见光传感器,研制了一套基于可见光高温热成像测温原理的燃烧测温装置。对装置进行了高温黑体炉的热辐射标定,经过标定后的燃烧测温装置误差小于1%;可以实时测量高温炉膛火焰的温度分布。在实验室标准燃烧器和工业窑炉内进行了燃烧火焰温度测量,并与红外热像仪、热电偶等测温结果进行了对比,实验表明,红外热像仪在测量未知发射率的目标时测温结果与热电偶测温结果偏差较大;而经过热辐射标定的该燃烧测温装置无论是否已知测量目标的发射率,其现场测温结果与热电偶测温结果相差都不大,且对于发射率已知的测量目标,该燃烧测温装置测量结果能够达到与红外热像仪相同的精度。
In view of the problems that it is difficult to measure the combustion temperature distribution in the high-temperature furnace by thermocouple and radiation pyrometer,and the results measured by infrared thermal imager have large deviation and are easily affected by the environment,a temperature measurement device for combustion based on visible high-temperature thermography was developed by using color CMOS as the visible sensor.Its thermal radiation calibration was carried out by a high-temperature black body furnace,and the error of the calibrated temperature measurement device was less than 1%.And the temperature measurement software for combustion in the furnace was developed,which can measure the temperature distribution of the high-temperature furnace flame in real-time.The flame temperature was measured in a laboratory standard burner and an industrial kiln,and the results were compared with the thermocouple and infrared thermal imager.The results show that the temperature results of the infrared thermal imager deviated significantly from the results of the thermocouple for the target with unknown emissivity,while this device can measure more accurate results regardless of whether the emissivity of the measurement target is known or not.
作者
闫慧博
唐广通
汪潮洋
李智聪
娄春
YAN Huibo;TANG Guangtong;WANG Chaoyang;LI Zhicong;LOU Chun(State Grid Hebei Energy Technology Service Co.,Ltd.,Shjiazhuang 050021,China;School of Energy and Power Engineering,Huazhong University of Science and Technology,W uhan 430074,China)
出处
《河北电力技术》
2022年第6期85-90,共6页
Hebei Electric Power
基金
国网河北能源技术服务有限公司科技项目(TSS2021-01)。
关键词
锅炉
燃烧温度测量
可见光高温热成像
火焰图像
温度分布
红外热成像
boiler
combustion temperature measurement
visible high-temperature thermography
flame image
temperature distribution
infrared thermography
