Experimental investigation of foam spread and extinguishment of the large-scale methanol pool fire

This article analyzes the fire extinguishing efficiency of hydrocarbon and fluorinated film-forming foaming agent. It was revealed that fluorinated blowing agents have a number of significant advantages over hydrocarbon. The main ones are: ensuring inertness when feeding from foam of various heights and distances, long-term prevention of reignition, extinguished petroleum product, the possibility of extinguishing hydrocarbon flames by supplying foam to the base of the tank, directly into the fuel layer

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“…The higher the spreading coefficient value is, the more efficient is the foam in extinguishing petroleum products [13][14][15][16][17].…”

Section: Resultsmentioning

confidence: 99%

Fire extinguishing efficiency of hydrocarbon and fluorinated film-forming foaming agent

Vlasov

Melnikov

2019

E3S Web Conf.

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“…Êîíêðåòíóþ ôîðìóëó âåùåñòâà ïðîèçâîäèòåëè ïåíîîáðàçîâàòåëÿ äåðaeàò â ñåêðåòå, íî îáùèé âèä ìîëåêóëû îïèñàí â ðàáîòàõ [16][17][18]. Ïðîèçâîäñòâî ýòîãî êîìïîíåíòà îãðàíè÷åíî â ñâÿçè ñ åãî îòðèöàòåëüíûì âëèÿíèåì íà îêðóaeàþùóþ ñðåäó [19,20].…”

Section: ñðåäñòâà è ñïîñîáû òóøåíèß ïîAeàðîâunclassified

Influence of Interfacial Tension on Flow Rate and Specific Consumption of Fluorinated Foaming Agent, Containing Added Ammonium Chloride

Melnikov¹

2018

PVB

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Â ðåçóëüòàòå ýêñïåðèìåíòàëüíûõ èññëåäîâàíèé ïðîöåññà òóøåíèÿ ïëàìåíè ãîðþ÷èõ aeèäêîñòåé îïðåäåëåíà êà÷åñòâåííî îñîáàÿ çàâèñèìîñòü ìåaeäó ïîâåðõíîñòíûì è ìåaeôàçíûì íàòÿaeåíèåì è îïòèìàëüíîé èíòåíñèâíîñòüþ ïîäà÷è ïåíû èç âîäíîãî ðàñòâîðà ôòîðèðîâàííîãî ïåíîîáðàçîâàòåëÿ ñ äîáàâêàìè õëîðèäà àììîíèÿ. Âûÿâëåíû çàâèñèìîñòè óäåëüíîãî ðàñõîäà ïåíîîáðàçîâàòåëÿ è èíòåíñèâíîñòè ïîäà÷è ïåíû îò êîýôôèöèåíòà ðàñòåêàíèÿ âîäíî-ñîëåâîãî ðàñòâîðà ïî ïîâåðõíîñòè ãåïòàíà è ãåïòàíà ïî âîäíî-ñîëåâîìó ðàñòâîðó ïåíîîáðàçîâàòåëÿ ñ ñîäåðaeàíèåì õëîðèäà àììîíèÿ. Îïðåäåëåíî âëèÿíèå êîýôôèöèåíòà ðàñòåêàíèÿ âîäíî-ñîëåâîãî ðàñòâîðà íà âðåìÿ òóøåíèÿ ãåïòàíà. Ïðåäñòàâëåíà çàâèñèìîñòü âðåìåíè òóøåíèÿ ïëàìåíè ãåïòàíà îò èíòåíñèâíîñòè ïîäà÷è ïåíû, ïîëó÷åííîé èç âîäíî-ñîëåâîãî ðàñòâîðà ïåíîîáðàçîâàòåëÿ. Îïðåäåëåíà çàâèñèìîñòü îïòèìàëüíîé èíòåíñèâíîñòè è ìèíèìàëüíîãî óäåëüíîãî ðàñõîäà ïåíîîáðàçîâàòåëÿ îò âåëè÷èíû êîýôôèöèåíòà ðàñòåêàíèÿ âîäíî-ñîëåâîãî ðàñòâîðà ïî ïîâåðõíîñòè ãåïòàíà. Óñòàíîâëåíî âëèÿíèå èçìåíåíèÿ êîíöåíòðàöèè ýëåêòðîëèòà-õëîðèäà àììîíèÿ íà ïîâåðõíîñòíîå è ìåaeôàçíîå íàòÿaeåíèå è îãíåòóøàùóþ ýôôåêòèâíîñòü ïåíû. Âûÿâëåíî, ÷òî ñíèaeåíèå ñïîñîáíîñòè ãîðþ÷åãî ðàñòåêàòüñÿ ïî ðàñòâîðó ïåííûõ ïëåíîê ïðèâîäèò ê ïîâûøåíèþ îãíåòóøàùåé ýôôåêòèâíîñòè, ÷òî âûðàaeàåòñÿ â ñíèaeåíèè ìèíèìàëüíîãî óäåëüíîãî ðàñõîäà ðàñòâîðà ïåíîîáðàçîâàòåëÿ è îïòèìàëüíîé èíòåíñèâíîñòè ïîäà÷è ïåíû, ïîëó÷åííîé èç ýòîãî ðàñòâîðà. Êëþ÷åâûå ñëîâà: îãíåòóøàùàÿ ýôôåêòèâíîñòü; ôòîðèðîâàííûé ïåíîîáðàçîâàòåëü; êîýôôèöèåíò ðàñòåêàíèÿ; îïòèìàëüíàÿ èíòåíñèâíîñòü ïîäà÷è; ìèíèìàëüíûé óäåëüíûé ðàñõîä.

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“…At the same time, when the foaming multiple increases, the density of foam declines. The fierce burning of fire produces the fire plume, blowing some foam out of the combustion area, which has nothing to do with the fire extinguishing (Zhang et al 2015). Furthermore, the coal fire belongs to three-dimensional combustion, though the foamed gel extinguishes the surface of coal heap fire and prevents the contact of coal and oxygen, the coal inside is not affected and remains in the smoldering fire state.…”

Section: Effect Of Foaming Multiple On Fire Extinguishing Propertymentioning

confidence: 99%

The fire extinguishing performances of foamed gel in coal mine

et al. 2016

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Experiments have been made to investigate how mass concentrations of thickener and crosslinker blends and foaming multiple affect temperature resistance of foamed gel. The results show that, at 100°C, the time for temperature tolerance of common foam is only 196 s, while the time of foamed gel formed by thickener and crosslinker with the mass fractions of both 0.3, 0.4 and 0.5 % is 570, 604 and 780 s, respectively. When the foaming multiple is 5, the time for temperature resistance is 620 s. But the time reduces to 360 s as the foaming multiple increases to 30. Furthermore, researches are also conducted on the extinguishing effect of foamed gel. It can be known from the results that, when putting out the coal fire with similar size, the volume of foamed gel used is only one-ninth of that of common foam and the extinguishing time is less than half of common foam. With increasing in the mass concentration of thickener and crosslinker blends, the extinguishing time first shortens and then prolongs. When the mass fraction of complex solution mixed by thickener and crosslinker is 0.6 %, the extinguishing efficiency is the highest. If the foaming multiple is 5, the extinguishing time is the shortest. However, the time remains constant when the foaming multiple is over 20.

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Experimental investigation of foam spread and extinguishment of the large-scale methanol pool fire

Cited by 45 publications

References 6 publications

Fire extinguishing efficiency of hydrocarbon and fluorinated film-forming foaming agent

Fire extinguishing efficiency of hydrocarbon and fluorinated film-forming foaming agent

Influence of Interfacial Tension on Flow Rate and Specific Consumption of Fluorinated Foaming Agent, Containing Added Ammonium Chloride

The fire extinguishing performances of foamed gel in coal mine

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