Effect of transformer oil on foam properties of fluorocarbon and hydrocarbon surfactant systems

doi:10.16265/j.cnki.issn1003-3033.2024.10.1888

Abstract

Abstract:

In order to prevent transformer fire accidents, short-chain fluorocarbons (FS-50) were combined with non-ionic (Alkyl Polyglucoside(APG)-0810), zwitterionic (Disodium Cocoamphodiacetate(CAD)-40) and anionic (Sodium Dodecyl Sulfate(SDS) )three kinds of foam solutions, APG-0810/FS-50, CAD-40/FS-50 and SDS/FS-50 were prepared. The basic properties, foamability, foam and liquid film stability of the foam solution in the presence of transformer oil were systematically studied. The curves of foam drainage, volume decay, oil volume and film thickness were obtained over time. The results show that oil has a significant influence on foam properties. Under the action of transformer oil, the foaming ability of the foam solutions decreased significantly, and the foaming ability of APG-0810/FS-50, CAD-40/FS-50 and SDS/FS-50 were reduced by 16.9%, 18.4% and 18.8% respectively. The volume of drainage in 60 min increased by 13.6%, 74.6% and 15.5%, respectively. Foam volume decay increased by 2.5%, 9.8% and 17.9%; The stability of liquid film decreased, and the film thickness decreased by 276.5, 414.7 and 552.9 nm, respectively, at 100 s. Among the three foam solutions, the mixture of APG-0810/FS-50 has the best inhibition ability to transformer oil, and the stable foam of this system has the best oil resistance to transformer oil. The research results of this paper can provide a theoretical basis for the development and selection of special extinguishing agent for transformer oil fire.

Key words: transformer oil, surfactant, foam properties, oil resistance, foam stability

CLC Number:

X932爆炸安全与防火、防爆

ZHANG Jiaqing, SHANG Fengju, MA Wenzhi, SHENG Youjie, GUO Yi. Effect of transformer oil on foam properties of fluorocarbon and hydrocarbon surfactant systems[J]. China Safety Science Journal, 2024, 34(10): 95-104.

Figures/Tables 12

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样品	表面张力/ (mN·m^-1)	电导率/ (μS·cm^-1)	黏度/ (mPa·s)
AF	16.24	287	1.26
AFO	22.38	280	2.56
CF	15.32	450	4.47
CFO	21.47	443	2.43
SF	20.04	1005	1.22
SFO	26.38	974	2.83