Analysis and Elimination of the Cause of Furnace Slagging in a Supercritical Slit Type Burner W-Flame Boiler
Pengzhi XU,
Pengyuan LIU,
Jiajia GAO,
Jianping HUANG,
Guifu WU,
Wen TANG
Affiliations
Pengzhi XU
China Huadian Electric Power Research Institute Co., LTD, Hangzhou 310001, Zhejiang Province, China
Pengyuan LIU
Key Laboratory for Thermal Science and Power Engineering of Ministry of Education(Department of Energy and Power Engineering, Tsinghua University), Haidian District, Beijing 100084, China
Jiajia GAO
China Huadian Electric Power Research Institute Co., LTD, Hangzhou 310001, Zhejiang Province, China
Jianping HUANG
China Huadian Electric Power Research Institute Co., LTD, Hangzhou 310001, Zhejiang Province, China
Guifu WU
China Huadian Electric Power Research Institute Co., LTD, Hangzhou 310001, Zhejiang Province, China
Wen TANG
China Huadian Electric Power Research Institute Co., LTD, Hangzhou 310001, Zhejiang Province, China
In order to study the slagging reason of a 600 MW supercritical W-flame boiler, a test study is carried out. The content includes the slagging position detection, gas composition measurement, the temperature distribution measurement and numerical simulation calculation. The results show that the upper part of the down furnace area's temperature is above 1 300 degrees and higher than the softening temperature of the coal; oxygen concentration is low, the concentration of CO is above 10 000 μL/L, showing a strong reducing atmosphere, where is obvious tendency of slagging; the special flow field are also analyzed. According to the analysis of the test results, targeted measures are taken to solve the slagging problem of this W-flame boiler furnace, and the boiler's reliability has been improved obviously.
