泡沫灭火剂的作用以及灭火原理
来源：http://www.cx-fire.com/ 日期：2022-11-18
泡沫灭火剂您见过吗？使用过吗？对该产品了解多少呢？实际上，我们几乎不会使用到它，但我们要提前了解它，以避免意外事故的发生。下面
川消小编为您介绍泡沫灭火剂的作用以及灭火原理。
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.
泡沫灭火剂的作用是：
The functions of foam extinguishing agent are:
1.灭火泡沫在燃烧物表面形成的泡沫覆盖层可以使燃烧物表面与空气隔离。
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.泡沫层可以封闭燃烧物表面，切断火焰对燃烧物的热辐射，防止燃烧物蒸发或热解挥发，防止可燃气体进入燃烧区域。
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.析出的泡沫液对燃烧表面温度具有冷却降温作用。
3. The separated foam liquid can cool the combustion surface temperature.
4.泡沫遇火后蒸发产生的水蒸气具有稀释燃烧区氧浓度的作用。
4. Water vapor generated by evaporation of foam after encountering fire has the effect of diluting oxygen concentration in combustion zone.
泡沫灭火剂的灭火原理：
Fire extinguishing principle of foam extinguishing agent:
①灭火时，在可燃液体表面，泡沫隔离层的产生取决于两个方向相反过程的速度比：一个是可燃液体表面泡沫损伤的速度；另一个是泡沫的喷射强度。如果喷射泡沫的强度超过其损伤速度，泡沫隔离层将立即在表面生成。由于可燃液体被泡沫冷却，泡沫损伤速度也随着时间的增长而降低。同时，泡沫层厚度的增长速度也增加，泡沫在可燃液体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.
相反如果泡沫供应强度小于泡沫损伤速度，则泡沫隔离层不会立即形成，但可燃液体温度会降低到泡沫供应强度开始超过泡沫损伤速度一段时间。可燃液体的加热层被泡沫冷却，降低了液体的蒸发速度，降低了燃烧区的可燃物浓度，降低了化学反应速度和放热率，有助于降低燃烧温度。
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可燃液体表面的泡沫隔离层一旦形成，就可以阻止火焰热流辐射流向可燃液体表面，冷却受热的液体表面。这将导致受热的可燃液体温度下降，减少进入燃烧区域的蒸发数量，降低氧化反应速度，减少热量释放，降低燃烧温度。
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当液体表面的泡沫层达到一定厚度时，泡沫层可以阻止可燃液体蒸汽进入燃烧区域，因此泡沫灭火剂将可燃液体与燃烧区域隔离，停止燃烧。
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.cx-fire.com Ask about it!
