微粒浓度对三相泡沫灭火剂性能影响研究
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摘要
针对水成膜泡沫灭火剂稳定性差的问题,在水成膜泡沫灭火剂中分别添加球状膨胀玻化微珠、片状滑石粉、纤维状硅灰石粉,形成三相泡沫灭火剂,试验研究三种微粒的浓度对泡沫灭火剂发泡倍数、析液时间、抗烧时间的影响。结果表明:固体微粒的加入能够显著提高水成膜泡沫灭火剂的稳定性,且含硅灰石粉泡沫灭火剂的稳定性、抗烧性均明显优于含滑石粉泡沫灭火剂和含膨胀玻化微珠泡沫灭火剂;硅灰石粉浓度为0. 3 g·mL~(-1)的泡沫灭火剂50%析液时间达到18. 9 min,抗烧时间达到50 min。
Three-phase foam was formed by adding expanded and vitrified small ball,plate-like talcum powder or fiber wollastonite particles into aqueous film forming foam to deal with the unstability of aqueous film-forming foam.The effect of particles concentration on the foam ability,drainage time and fire resistance property of three-phase foam was studied. The results showed that: particles were helpful for foam stability; both foam stability and fire resistance property of fire foam with fiber wollastonite particles were better than that with expanded and vitrified small ball or plate-like talcum powder; when fiber wollastonite particle concentration was 0.3 g·mL~(-1),50% drainage time of foam was 18.9 min. And the foam fire resistance time is 50 min.
Three-phase foam was formed by adding expanded and vitrified small ball,plate-like talcum powder or fiber wollastonite particles into aqueous film forming foam to deal with the unstability of aqueous film-forming foam.The effect of particles concentration on the foam ability,drainage time and fire resistance property of three-phase foam was studied. The results showed that: particles were helpful for foam stability; both foam stability and fire resistance property of fire foam with fiber wollastonite particles were better than that with expanded and vitrified small ball or plate-like talcum powder; when fiber wollastonite particle concentration was 0.3 g·mL~(-1),50% drainage time of foam was 18.9 min. And the foam fire resistance time is 50 min.
引文
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[2]WANG B Q. Study on the cause of oil tank fire and fire prevention countermeasure[J]. Advanced Materials Research,2014,864-867:866-870.
[3]MIKE W. Selecting the right foam for storage tank fire fighting[J]. International Fire Protection,2005,11:15.
[4]ZHAO B. Radiation thermal transfer of the LPG tank under the pool fire[J]. Recent Patents on Engineering,2014,8:33-40.
[5]ALARGOVA R G,WARHADPANDE D S,PAUNOV V N,et al. Foam superstabilization by polymer microrods[J]. Langmuir,2004,20(24):10371-10374.
[6] MOHAMEDI G,AZMIN M,Pastoriza-Santos I,et al.Effects of gold nanoparticles on the stability of microbubbles[J]. Langmuir,2012,28:13808-13815.
[7]傅柄棋,唐宝华.不同粒径二氧化硅对抗醇泡沫灭火剂性能影响实验研究[J].消防科学与技术,2016,35(3):407-410.
[8] HOROZOV T S. Foams and foam films stabilised by solid particles[J]. Curr. Opin. Colloid&Interface Sci.,2008,13(3):134-140.
[9]蒋新生,翟琰,尤杨,等.防灭火三相泡沫流体特性及油面铺展性能研究[J].中国安全科学学报,2016,26(2):44-49.
[10]TIAN H F,YAO Y Y,MA S B,et al. Enhanced thermal stability and flame resistance of polyurethane-imide foams by adding silicon carbide[J]. Advances in Polymer Technology,2017,00:1-8.