基于全域红外热成像的空预器积灰监测技术  

Ash deposition monitoring technology of air preheater based on full domain infrared thermal imaging

作　　者：邓永强 毛梦婷 林福海 张员根 邱秀婷 习伯泉 许志浩 DENG Yongqiang;MAO Mengting;LIN Fuhai;ZHANG Yuangen;QIU Xiuting;XI Boquan;XU Zhihao(Electric Power Research Institute of State Grid Jiangxi Electric Power Co. , Ltd.;Nanchang Kechen Electric Power Test and Research Co. , Ltd. , Jiangxi Nanchang 330096,China;Nanchang Institute of Engineering, Jiangxi Nanchang 330099, China)

机构地区：[1]南昌科晨电力试验研究有限公司 [2]国网江西省电力有限公司电力科学研究院,江西南昌330096 [3]南昌工程学院电气工程学院,江西南昌330099

出　　处：《工业仪表与自动化装置》2022年第1期66-70,共5页Industrial Instrumentation & Automation

基　　金：南昌科晨电力试验研究有限公司资助项目(kc2006)。

摘　　要：空气预热器是燃煤火力机组的核心换热元件,由于氨逃逸引起的空预器堵灰现象,对其安全稳定运行会产生严重影响。针对堵灰问题,提出了一种基于全域红外热成像的空预器换热元件局部堵塞状态监测方法,运用高分辨率红外热成像测温技术实现换热元件温度的准确观测,同时采用多点协同观察和视角优化设计方法,达到换热元件全域观察能力,并设计集成边缘计算监测系统,对多点全域红外热像图进行实时智能识别与积灰诊断,红外画面与诊断结果经光纤通讯传输至机组监控中心。该方法可有效解决火力发电机组空预器积灰监测精准难题,确保机组空预器安全稳定运行。Air preheater is the core heat exchange element of coal-fired thermal power unit.The ash blockage of air preheater caused by ammonia escape will have a serious impact on its safe and stable operation.Aiming at the problem of ash blockage,a local blockage state monitoring method of air preheater heat exchange element based on global infrared thermal imaging is proposed.The high-resolution infrared thermal imaging temperature measurement technology is used to realize the accurate observation of heat exchange element temperature.At the same time,the multi-point collaborative observation and angle optimization design method are adopted to achieve the global observation ability of heat exchange element,and an integrated edge calculation and monitoring system is designed,Carry out real-time intelligent identification and ash accumulation diagnosis for multi-point global infrared thermal image,and the infrared image and diagnosis results are transmitted to the unit monitoring center through optical fiber communication.This method can effectively solve the problem of accurate ash deposition monitoring of air preheater of thermal generator unit and ensure the safe and stable operation of air preheater of unit.

关 键 词：空气预热器 堵灰 换热元件 监测 

分 类 号：TN215[电子电信—物理电子学]