基于自发辐射分析的高碱煤燃烧炉内在线监测技术研究进展
Research progress on online in-furnace monitoring techniques during high-alkali coal combustion based on spontaneous emission radiation analysis
陈装 1黄华汉 1傅勇强 1李华鸿 1方顺利 2王志超 2陈端 3张冲 3王浩帆 3马帅 3姚斌 3娄春3
作者信息
- 1. 湛江中粤能源有限公司,广东 湛江 524000
- 2. 西安热工研究院有限公司,陕西 西安 710054
- 3. 华中科技大学煤燃烧国家重点实验室,湖北 武汉 430074
- 折叠
摘要
准东煤等高碱煤在新疆地区储量巨大,但其富含的碱金属元素极易导致炉膛受热面沾污、结渣等问题,会影响锅炉运行的安全性,研发高碱煤高效清洁燃烧发电技术对实现"双碳"目标有重要意义.总结了基于自发辐射分析的高碱煤燃烧炉内在线监测技术的研究进展,重点介绍了发射光谱技术、自发辐射图像处理及成像技术在高碱煤燃烧监测领域的研究现状及应用情况,进而对其发展趋势和动态进行探讨.发射光谱技术通过对火焰发出的不同波长光谱辐射信号进行处理获取温度与组分,近期,已广泛用于测量工业炉膛燃烧火焰温度和气相碱金属质量浓度,并基于此对炉内结渣趋势进行定性判断.自发辐射图像处理及成像技术具备信号空间分布的解析能力,利用CCD、CMOS等面阵传感器获取炉内自发辐射图像,基于图像处理与热辐射成像原理,结合辐射反问题求解方法,可以获得燃烧场在三维空间的温度分布以及二维壁温分布,使结渣的三维可视化监测成为可能.未来需基于发射光谱技术、自发辐射图像处理及成像技术对二维或者三维的受热面结渣沾污进行监测,结合炉内燃烧温度与气相碱金属质量浓度等参数分布,建立高碱煤燃烧受热面结渣沾污的定量判断指标,最终达到对受热面结渣沾污在线预测的目标.
Abstract
High-alkali coal such as Zhundong coal has huge reserves in Xinjiang,in which rich alkali metal elements can easily lead to fouling and slagging problem on heating surface of the furnace,thus to decrease the safety of boiler.It is of great significance to develop efficient and clean combustion power generation technology for high-alkali coal to achieve the"double-carbon"goal.The research progress of the online monitoring technology in high-alkali coal combustion furnace based on spontaneous emission radiation analysis is summarized.The development trend and dynamics are discussed focusing on the research status and application of emission spectrum technology and spontaneous emission radiation imaging and image processing technology in high-alkali coal combustion monitoring.Emission spectroscopy can obtain the temperature and component concentration by processing the spectral radiation signal emitted by the flame at different wavelengths.Recently,it has been widely used to measure the combustion temperature and the gaseous alkali metal concentration in the industrial furnace and judge the slagging trend in the furnace qualitatively.Different from emission spectroscopy technology,spontaneous emission radiation imaging and image processing technology has the ability to analyze the spatial distribution of signals.The technology obtains the spontaneous radiation image in the furnace via CCD,CMOS and other surface array sensors.Based on image processing technology and thermal radiation imaging theory,the temperature distribution of the combustion field in three-dimensional space can be obtained combining with solving radiation inverse problem,which makes it possible to monitor the three-dimensional visual of slagging formation.In the future,monitoring of the fouling and slagging on the heating surface in two or three dimensions should be carried out based on emission spectroscopy technology,spontaneous emission radiation imaging and image processing technology.Combined with the distribution of parameters such as combustion temperature and gaseous alkali metal concentration in the furnace,a quantitative judgmental index of fouling and slagging on the heating surface of high-alkali coal combustion should be established to achieve the goal of online prediction of fouling and slagging on the heating surface.
关键词
高碱燃料/自发辐射分析/火焰发射光谱/图像处理/热辐射成像Key words
high-alkali fuel/analysis of spontaneous emission radiation/flame emission spectroscopy/image processing/thermal radiation imaging引用本文复制引用
基金项目
中国华能集团有限公司总部科技项目(HNKJ22-H34)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据