超临界锅炉过热器炉内外壁温对比试验及分析

Contrast Experiment and Analysis of the Inner and Outer Wall Temperature of a Supercritical Boiler Superheater

在600 MW超临界锅炉机组上进行了过热器炉内外壁温测量对比试验,目的是为了全面掌握超临界锅炉过热器炉内壁温状况。试验中实时采集了炉内壁温及炉外壁温的实时数据,并将采集的各种数据分析对比,从而对过热器的炉内壁温分布、炉内外壁温关联规律等进行了分析研究,得到了600 MW超临界锅炉过热器炉内外温度特性即炉外与炉内的管壁温度波动趋势、过热器炉内外负荷、水煤比、主汽温度的波动与炉内外管壁温差波动趋势相同的规律,对于研究600 MW超临界锅炉过热器管壁壁温监测以及寿命诊断具有重要的意义。

On a 600 MW supercritical boiler,performed was an inner and outer wall temperature measurement contrast experiment of the boiler with a purpose to comprehensively grasp the infurnace wall temperature conditions of the boiler superheater.During the test,the data showing the change of the internal and external wall temperatures were real-time acquired,and compared and analyzed with each other.The in-furnace wall temperature distribution of the superheater and the correlation law governing the internal and external wall temperatures etc.were thereby analyzed and studied.The internal and external wall temperature characteristics of the above-mentioned boiler superheater were obtained,including the fluctuation tendency of the tube wall temperatures inside and outside the furnace,the inside and outside load of the superheater,water/coal ratio and an identical regularity governing the fluctuation of the main steam temperature and the fluctuation tendency of the tube wall temperature difference ΔT inside and outside the furnace.The foregoing is of major significance for tube wall temperature monitoring and life diagnosis of 600 MW supercritical boiler superheaters in the future studies.