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利用镍铬-镍硅铠装热电偶测量了两台同类型600 MW自然循环亚临界参数锅炉部分屏式过热器、高温过热器和高温再热器管段的炉内管壁温度,测量时对热电偶与管壁的接触点处进行了防磨和保温处理,介绍了测点的布置工艺。在锅炉不同稳定负荷下对上述管壁温度进行了测量,结果证明在炉内的实测温度高于炉外测量的温度。在低负荷下,实测温度可以与表盘显示温度保持较好的一致,二者的测量偏差在10～40℃范围内;然而在锅炉较高负荷下,虽然由于时间过久多数测点已经失效,但在高温再热器处仍然测得炉内壁温与炉外壁温的差值约在60～100℃范围之内,且随着负荷增加其差值有增加的趋势。中高负荷下必须更加重视锅炉受热面壁温的检测。
The wall temperatures of furnace tubes in two 600 MW natural circulation subcritical partial boiler superheaters, high temperature superheater and high temperature reheater tubes were measured by nickel-chromium-nickel-silicon armored thermocouples. During the measurement, Even the contact point with the wall of the anti-wear and heat treatment, measuring point of the introduction of the process. The tube wall temperature was measured at different stable loads of the boiler and the results showed that the measured temperature in the furnace was higher than the temperature measured outside the furnace. Under low load, the measured temperature can be kept in good agreement with the temperature of the dial. The measurement deviation between the two is within the range of 10-40 ° C .; however, under the high load of the boiler, although the measurement points have expired due to the long time, However, the difference between the temperature inside the furnace and the temperature outside the furnace measured at the high temperature reheater is still within the range of 60-100 ° C, and the difference tends to increase as the load increases. In the high load must pay more attention to the detection of boiler heating surface temperature.