Experimental Study on Temperatures of Water Walls in a 1000 MW Ultra-Supercritical Boiler under the Condition of Flexible Peak Regulation

Liyun Yan (), Jiang Pu, Xueling Li, Cai Lv, Xuehong Wu, Liansheng Li and Xiaofeng Lu
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Liyun Yan: College of Building Environment Engineering, Zhengzhou University of Light Industry, Zhengzhou 450000, China
Jiang Pu: Henan Electric Power Generation Limited Company Pingdingshan Generation Branch, State Power Investment Corporation, Pingdingshan 467000, China
Xueling Li: College of Building Environment Engineering, Zhengzhou University of Light Industry, Zhengzhou 450000, China
Cai Lv: College of Energy and Power Engineering, Zhengzhou University of Light Industry, Zhengzhou 450000, China
Xuehong Wu: College of Energy and Power Engineering, Zhengzhou University of Light Industry, Zhengzhou 450000, China
Liansheng Li: Henan Electric Power Generation Limited Company Pingdingshan Generation Branch, State Power Investment Corporation, Pingdingshan 467000, China
Xiaofeng Lu: Key Laboratory of Low-Grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education of China, Chongqing 400044, China

Energies, 2024, vol. 17, issue 17, 1-16

Abstract: To meet the Chinese government’s energy-saving and emission-reduction policies, flexible peak regulation is necessary for traditional coal-fired boilers. Flexible peaking leads to large changes in boiler load, which affects the safety of the boiler water wall. In this paper, a 1000 MW ultra-supercritical unit was tracked for three years, and effective data were selected to study the temperature characteristics of the water wall under flexible peak regulation. The results show that the lower the load, the greater the temperature fluctuation of the water wall. The temperature distribution of the spiral water wall is more uniform. The position of the temperature valley value of the rear spiral water wall was found, and the load of more even temperature distribution was also found. The temperature change of the front vertical water wall was the most complex of all the water walls. The 643.9 MW load case showed different behavior to the temperature distribution of the water wall. The side water walls were heated evenly under the different loads. The characteristics of the temperature distribution of the side vertical water wall were found through statistical analysis. The fitting equation for the change rule of the temperature is presented. The higher the load, the better the equations. Finally, this paper gives some advice on how to avoid temperature deviation in the water wall, and the detailed research highlights the safe running of water walls.

Keywords: flexible peak regulation; 1000 MW ultra-supercritical boiler; spiral water wall; vertical water wall; wall temperature (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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