泡沫滅火劑的作用以及滅火原理
來源：http://www.xintli.net/ 日期：2022-11-18
泡沫滅火劑您見過嗎？使用過嗎？對該產品了解多少呢？實際上，我們幾乎不會使用到它，但我們要提前了解它，以避免意外事故的發生。下面
川消小編為您介紹泡沫滅火劑的作用以及滅火原理。
Have you seen foam extinguishing agent? Have you used it? How much do you know about this product? In fact, we hardly use it, but we should know it in advance to avoid accidents. The following section of Chuanxiao will introduce the function of foam fire extinguishing agent and fire extinguishing principle.
泡沫滅火劑的作用是：
The functions of foam extinguishing agent are:
1.滅火泡沫在燃燒物表面形成的泡沫覆蓋層可以使燃燒物表面與空氣隔離。
1. The foam covering layer formed by the extinguishing foam on the surface of the combustor can isolate the surface of the combustor from the air.
2.泡沫層可以封閉燃燒物表面，切斷火焰對燃燒物的熱輻射，防止燃燒物蒸發或熱解揮發，防止可燃氣體進入燃燒區域。
2. The foam layer can seal the surface of the combustor, cut off the heat radiation of the flame to the combustor, prevent the evaporation or pyrolysis volatilization of the combustor, and prevent the combustible gas from entering the combustion area.
3.析出的泡沫液對燃燒表面溫度具有冷卻降溫作用。
3. The separated foam liquid can cool the combustion surface temperature.
4.泡沫遇火后蒸發產生的水蒸氣具有稀釋燃燒區氧濃度的作用。
4. Water vapor generated by evaporation of foam after encountering fire has the effect of diluting oxygen concentration in combustion zone.
泡沫滅火劑的滅火原理：
Fire extinguishing principle of foam extinguishing agent:
①滅火時，在可燃液體表面，泡沫隔離層的產生取決于兩個方向相反過程的速度比：一個是可燃液體表面泡沫損傷的速度；另一個是泡沫的噴射強度。如果噴射泡沫的強度超過其損傷速度，泡沫隔離層將立即在表面生成。由于可燃液體被泡沫冷卻，泡沫損傷速度也隨著時間的增長而降低。同時，泡沫層厚度的增長速度也增加，泡沫在可燃液體表面的分散速度也加快。
① During fire extinguishing, on the surface of combustible liquid, the generation of foam isolation layer depends on the speed ratio of two opposite processes: one is the speed of foam damage on the surface of combustible liquid; The other is the spray strength of foam. If the strength of sprayed foam exceeds its damage speed, the foam isolation layer will be immediately generated on the surface. As the combustible liquid is cooled by foam, the damage rate of foam also decreases with time. At the same time, the growth rate of foam layer thickness also increased, and the dispersion rate of foam on the surface of combustible liquid also accelerated.
相反如果泡沫供應強度小于泡沫損傷速度，則泡沫隔離層不會立即形成，但可燃液體溫度會降低到泡沫供應強度開始超過泡沫損傷速度一段時間。可燃液體的加熱層被泡沫冷卻，降低了液體的蒸發速度，降低了燃燒區的可燃物濃度，降低了化學反應速度和放熱率，有助于降低燃燒溫度。
On the contrary, if the foam supply strength is less than the foam damage speed, the foam isolation layer will not be formed immediately, but the temperature of combustible liquid will decrease until the foam supply strength starts to exceed the foam damage speed for a period of time. The heating layer of combustible liquid is cooled by foam, which reduces the evaporation rate of liquid, the combustible concentration in the combustion zone, the chemical reaction rate and heat release rate, and helps to reduce the combustion temperature.
②可燃液體表面的泡沫隔離層一旦形成，就可以阻止火焰熱流輻射流向可燃液體表面，冷卻受熱的液體表面。這將導致受熱的可燃液體溫度下降，減少進入燃燒區域的蒸發數量，降低氧化反應速度，減少熱量釋放，降低燃燒溫度。
② Once the foam isolation layer on the surface of combustible liquid is formed, it can prevent the flame heat flow radiation from flowing to the surface of combustible liquid to cool the heated liquid surface. This will cause the temperature of heated flammable liquid to drop, reduce the amount of evaporation entering the combustion area, reduce the rate of oxidation reaction, reduce heat release, and lower the combustion temperature.
③當液體表面的泡沫層達到一定厚度時，泡沫層可以阻止可燃液體蒸汽進入燃燒區域，因此泡沫滅火劑將可燃液體與燃燒區域隔離，停止燃燒。
③ When the foam layer on the liquid surface reaches a certain thickness, the foam layer can prevent the flammable liquid vapor from entering the burning area, so the foam extinguishing agent will isolate the flammable liquid from the burning area and stop burning.
So far we have explained the function of foam extinguishing agent and the fire extinguishing principle. If you have any questions or needs, please come to our website at any time http://www.xintli.net Ask about it!
