Electric Power ›› 2014, Vol. 47 ›› Issue (5): 32-34.DOI: 10.11930/j.issn.1004-9649.2014.5.32.2

• Security Column • Previous Articles     Next Articles

Tracing the Source of Black Particles in Fire-Resistant Oil of Unit 2 in a Power Plant

WANG Xiao-wei1, ZHAO Ping-zhong2, WANG Juan1, TANG Jin-wei1   

  1. 1. Xi’an Thermal Power Research Institute Co. Ltd., Xi’an 710032, China;
    2. Jiutai Power Plant, Huaneng Jilin Power Generation Co., Ltd., Jiutai 130501, China
  • Received:2014-02-05 Online:2014-05-31 Published:2015-12-21

Abstract: Black particles are observed in the fire-resistant oil of Unit 2 in a power plant. Even after the oil treatment with the fire-resistant oil treatment equipments, the black particles still come up occasionally. Through the analysis by SEM, X-Ray energy spectrum and overheat spot searching in turbine regulating system, the black particles are determined to be the coke generated from the fire-resistant oil under the local long-term overheating environment. Therefore, preventive measures are put forward, such as enhancing oil filtering, to remove the carbides and impurity particles from the oil in time, isolating and removing the overheat spots as soon as possible to eradicate the root cause of any potential carbonization from local overheating.

Key words: fire-resistant oil, black particle, governing system, overheat spot, carbonization

CLC Number: