Study on Testing Method and Application of Water Wall Tube Temperature for Ultra-Supercritical Boiler

doi:10.11930/j.issn.1004-9649.201807038

Abstract

Abstract: The measurement and control of water wall tube temperature has been a tough issue in thermal power plants. By virtue of some testing devices which are installed at special locations in the water wall tubes, the temperatures of fireside tube, backside tube and working medium inside the tube are measured and monitored on-line under various operating conditions for the analysis of the impacts of the relevant factors on the water wall temperature in daily operations. The study results show that the ramping up process after startup, the soot blowing during the load variation period and the water-coal ratio imbalance can cause or even aggravate the sharp rise of water wall tube temperature, while the ramping down process or the procedure change of coal mills do not affect much on the water wall tube temperature. The testing device and the study results can provide some guidance for the safe operation of the water wall in thermal power plants.

Key words: ultra-supercritical boiler, water wall tube, temperature monitoring, application study

CLC Number:

TK223.3

WANG Yang, WANG Huajian, ZHOU Hongguang, YAN Xianglin, BAI Peng, LU Qi. Study on Testing Method and Application of Water Wall Tube Temperature for Ultra-Supercritical Boiler[J]. Electric Power, 2019, 52(1): 166-173.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201807038

https://www.electricpower.com.cn/EN/Y2019/V52/I1/166

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