基于光纤传感器的锅炉水冷壁多点温度分布在线监测研究  

Investigation of Online Monitoring Multi-point Temperature Array of Boiler Water-wall Based on Optical Fiber Sensor

作　　者：方久文 高宝生 毕树茂 娄春[2] 邹燕 FANG Jiuwen;GAO Baosheng;BI Shumao;LOU Chun;ZOU Yan(Tianjin China Energy Binhai Thermal Power Co.Ltd.,Tianjin 300459,China;State Key Laboratory of Coal Combustion,Huazhong University of Science and Technology,Wuhan 430074,China;Tianjin Firefly Creation Technology Co.Ltd.,Tianjin 300392,China)

机构地区：[1]天津国能津能滨海热电有限公司,天津300459 [2]华中科技大学煤燃烧国家重点实验室,湖北武汉430074 [3]萤火创世(天津)科技有限公司,天津300392

出　　处：《工业加热》2025年第3期64-68,共5页Industrial Heating

基　　金：国家自然科学基金项目(51827808);天津国能津能滨海热电有限公司科技项目。

摘　　要：水冷壁是锅炉最主要的受热面,实时在线监测水冷壁温度判断并预防水冷壁积灰结渣及超温具有重要意义。在锅炉水冷壁上串联布置了多个光纤光栅温度传感器,开展了锅炉水冷壁管壁温度分布测量的实验研究。首先,介绍了串联式光纤光栅测温技术原理,并对光纤光栅温度传感器的测温精度进行了检验,得到温度传感器的测温误差不到1%;然后,在一台350 MW发电机组锅炉上布置了240个光纤光栅温度传感器,建立了一套锅炉水冷壁多点组阵温度在线监测系统,最后,对机组稳负荷、变负荷运行工况下24h连续测量数据进行分析,结果表明:基于光纤测温获得的锅炉水冷壁管壁温度能反映机组运行工况的变化,表征锅炉在不同运行条件下水冷壁壁温分布及热负荷分布规律,有助于运行操作人员对水冷壁内汽水状态进行分析判断,为锅炉运行的安全经济性提供技术支持。Water wall is the most important heating surface of boiler.It is of great significance to monitor the temperature of water wall online in real time and to prevent ash and slag accumulation and overtemperature.A number of FBG temperature sensors are arranged in series on the boiler water wall,and an experimental study is carried out to measure the temperature distribution of the boiler water wall.Firstly,the principle of serial fiber grating temperature measurement technology was introduced,and the accuracy of temperature measurement of fiber grating temperature sensor was tested,and the error of temperature measurement was less than 1%.Then,240 FBG temperature sensors were installed on the boiler of a 350 MW generator set,and a multi-point array temperature online monitoring system for boiler water wall was established.Finally,24 h continuous measurement data of the unit under stable load and variable load operating conditions were analyzed,and the results showed that:The temperature of boiler water wall tube based on optical fiber temperature measurement can reflect the changes of unit operating conditions,characterize the distribution of water wall temperature and heat load under different operating conditions of boiler,and help operation operators to analyze and judge the state of water and water in the water wall,and provide technical support for the safety and economy of boiler operation.

关 键 词：锅炉水冷壁 管壁温度分布 光纤光栅测温 在线监测 

分 类 号：TK730.2[交通运输工程—轮机工程]