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Research on the Causes and Prevention Technologies of Stall and Surge in Induced Draft Fans of Large Thermal Power Units

Jin Li （ Guoyang Guohuai New Energy Co., Ltd., Bozhou, Anhui 233663, China ）

Li Jia （ Guoyang Guohuai New Energy Co., Ltd., Bozhou, Anhui 233663, China ）

https://doi.org/10.37155/2972-483X-0304-6

Abstract

In large thermal power units, induced draft (ID) fans are critical auxiliary equipment for maintaining stable and reliable operation. Owing to their complex operating conditions, ID fans are prone to stall and surge phenomena, which can reduce operational efficiency, increase energy consumption, and even cause equipment damage, thereby threatening unit safety. This study systematically analyzes the operating principles and characteristics of ID fans in large thermal power units, elucidates the mechanisms of stall and surge, and investigates monitoring and diagnostic technologies. Furthermore, prevention and control measures are proposed from the perspectives of design optimization, operational adjustment, installation of auxiliary devices, and control strategy improvement. By integrating multi-parameter monitoring with intelligent control methods, the probability of stall and surge can be effectively reduced, enhancing the operational stability and economic performance of power units. The findings provide a valuable technical reference for the safe and stable operation of large thermal power units.

Keywords

Large thermal power units; induced draft fan; stall and surge; monitoring and diagnosis; prevention and control technologies

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References

[1] Shi Cheng. Analysis and Preventive Measures for Stall in Axial Flow Induced Draft Fans of 300MW Units[J]. Fluid Measurement & Control, 2022, 3(01): 10-12.
[2] Luo Renda, Wang Zhengxian, Guo Ronghe, et al. Vibration Fault Diagnosis and Field Dynamic Balancing of Induced Draft Fans in Thermal Power Plants[J]. Light & Lighting, 2021(4): 74-75.

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