超超临界660 MW塔式锅炉末级过热器炉内外壁温对比分析

利用超超临界660 MW塔式锅炉末级过热器炉内外壁温测点数据,分析在不同负荷下炉内壁温与炉外壁温的关系。结果表明:机组运行过程中,要关注管屏以及同屏管间热负荷分布情况,以便及时通过燃烧调整消除热偏差;随负荷变化,炉内外壁温变化趋势相同,炉外壁温经估算后能够反映炉内管壁的实际温度;壁温监测需要炉内外壁温测点相互配合,以防炉内温度测点所在位置不是热负荷高的区域。

Contrastive Analysis of the Inner and Outer Wall Temperature of the Final Superheater of Ultra-supercritical 660 MW Tower Boiler

The relationship between the inner and outer wall temperature of the final superheater of a 660 MW ultra-supercritical Tower Boiler under different loads is analyzed by using the measured data of the inner and outer wall temperature of the furnace at different loads. The results show that during the operation of the unit, attention should be paid to the distribution of heat load between the tube panels and the same screen tubes so as to eliminate the thermal deviation in time through combustion adjustment. With the change of load, the change trend of inner and outer wall temperature is the same. The estimated outer wall temperature can reflect the actual temperature of inner wall of furnace. Wall temperature monitoring needs the cooperation of temperature measuring points inside and outside the furnace, so as to prevent the location of temperature measuring points in the furnace from being in the area of high heat load.