Title :
Root cause analysis and remedial renovation of one 350MW boiler made by Mitsubishi
Author :
Zhao Zhen-ning ; Zhao Zhen-zhou ; Zhang Qing-Feng ; Zhu Xie-ran ; Chen Liang
Author_Institution :
Inst. of Power Boiler Technol., North China Electr. Power Res. Inst. Co., Ltd., Beijing, China
Abstract :
When the fuel of two boilers in one Power Plant was changed to SHENHUA coal, a serial of problems were appeared, such as a lower temperature of the main steam, a larger deviation of the reheat steam temperature and a higher temperature of the flue gas, etc. Through a deep theoretical analysis, it was found that the insufficiency of heat exchange surfaces of superheaters was the main reason caused these problems. After adding heat delivery surface and changing normal Secondary Air burner AA to horizontally tilting OFA burner, all of these problems were solved.
Keywords :
boilers; flue gases; heat exchangers; heat transfer; steam power stations; Mitsubishi; OFA burner; SHENHUA coal; boiler; flue gas; heat delivery surface; heat exchange; power 350 MW; power plant; reheat steam temperature; remedial renovation; root cause analysis; secondary air burner; superheaters; Boilers; Coal; Furnaces; Heat transfer; Resistance heating; Temperature distribution; boiler renovation; flue gas temperature; heat delivery surface; main steam temperature; reheat steam temperature;
Conference_Titel :
Electric Information and Control Engineering (ICEICE), 2011 International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-8036-4
DOI :
10.1109/ICEICE.2011.5777048
