Application of Varnish Potential Rating on Deterioration Analysis of Phosphates Ester Fire Resistant Oil

doi:10.11930/j.issn.1004-9649.201711139

Abstract

Abstract: The flash point, volume resistivity and foaming properties of phosphates ester fire resistant oil of unit 5 of a large power plant were found exceeding the standards. To find out the cause of deterioration, many indicators of operating phosphates ester fire resistant oil (operating oil) and new phosphates ester fire resistant oil of unit5 were tested according to DL/T 571-2014 "Guide for operation and maintenance of phosphates ester fire-resistant fluid used in power plant". The results indicated that there was nothing abnormal detected in the chlorine content, elemental analysis or mineral oil, which made it difficult to identify the real cause of deterioration. Then after the varnish potential rating was innovatively applied to the cause analysis of deterioration of phosphates ester fire resistant oil, it was noticed that the varnish potential rating of fire resistant oil of unit 5 was 43.4, while the varnish potential rating of new oil of unit 5 was 0.1. By taking account of the oil color change, it was concluded that the aging of oil was serious and urgent treatment was needed. As a result suggestions to change the oil and strengthen the daily supervision of fire-resistant oil were proposed. Therefore it is of great importance to apply the varnish potential ratings in oil analysis.

Key words: power plant, fire-resistant oil, deterioration causes, analysis of oil, varnish potential rating

CLC Number:

ZHU Zhiping, WANG Deng, ZHANG Li, LIN Yongping, QIAN Yihua, CHEN Tiansheng, FAN Shengping, SU Wei, FU Qiang. Application of Varnish Potential Rating on Deterioration Analysis of Phosphates Ester Fire Resistant Oil[J]. Electric Power, 2018, 51(7): 108-112,144.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201711139

https://www.electricpower.com.cn/EN/Y2018/V51/I7/108

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