泡沫灭火器

Foam fire extinguisher

泡沫灭火器主要依靠二氧化碳泡沫灭火。灭火器内装有饱和碳酸氢钠溶液和饱和硫酸铝溶液。使用前需要将灭火器倒置，使两种溶液接触并发生水解反应，从而产生大量二氧化碳和氢氧化铝。降水、二氧化碳不助燃，比空气重。当二氧化碳附着在燃烧物表面时，会隔绝外界氧气，阻止燃烧物燃烧。水解反应产生的氢氧化铝还可以覆盖燃烧物，提高灭火效果。

Foam extinguishers mainly rely on carbon dioxide foam for fire extinguishing. The fire extinguisher is equipped with saturated sodium bicarbonate solution and saturated aluminum sulfate solution. Before use, the fire extinguisher needs to be inverted to make the two solutions contact and hydrolyze, so as to produce a large amount of carbon dioxide and aluminum hydroxide. Precipitation and carbon dioxide do not support combustion and are heavier than air. When carbon dioxide is attached to the surface of the combustor, it will isolate the external oxygen and prevent the combustor from burning. The aluminum hydroxide produced by hydrolysis reaction can also cover the combustibles and improve the fire extinguishing effect.

水式灭火器

Water fire extinguisher

水式灭火器主要部署在甲类火场，即固体物质火场。燃烧材料通常包括木材、干草、棉花、羊毛、麻、纸等。

Water type fire extinguishers are mainly deployed in class a fire sites, i.e. solid material fire sites. Combustion materials usually include wood, hay, cotton, wool, hemp, paper, etc.

水式灭火器包括清水灭火器和酸碱灭火器。清水灭火器主要依靠冷却和窒息，即液态水汽化时，吸收大量热量，使环境温度下降，冷却燃烧物来灭火。另外，液态水汽化后的水蒸气是一种惰性气体，其体积会膨胀约1700倍，水蒸气可以稀释燃烧物周围的氧气含量，隔绝外界氧气，从而达到灭火的目的。火。

Water fire extinguishers include water fire extinguishers and acid-base fire extinguishers. Clear water fire extinguishers mainly rely on cooling and suffocation, that is, when liquid water vaporizes, it absorbs a lot of heat to reduce the ambient temperature and cool the combustibles to put out the fire. In addition, the water vapor after the vaporization of liquid water is an inert gas, and its volume will expand about 1700 times. The water vapor can dilute the oxygen content around the combustor and isolate the external oxygen, so as to achieve the purpose of fire extinguishing. Fire.

干粉灭火器

Dry powder fire extinguisher

根据灭火器的不同，干粉灭火器可分为磷酸铵干粉灭火器和碳酸氢钠干粉灭火器。磷酸铵干粉灭火器可用于扑灭A、B、C、E类火灾。扑灭B级、C级和E级火灾；干粉灭火器的灭火原理是：干粉很细，可以附着在燃烧物体的表面来控制燃烧。使用干粉灭火器时，需要近距离喷射火焰，因为干粉易分散，不适合逆风喷射。

According to different fire extinguishers, dry powder fire extinguishers can be divided into ammonium phosphate dry powder fire extinguishers and sodium bicarbonate dry powder fire extinguishers. Ammonium phosphate dry powder fire extinguisher can be used to extinguish class A, B, C and e fires. Extinguish class B, C and e fires; The fire extinguishing principle of dry powder fire extinguisher is that the dry powder is very fine and can be attached to the surface of the burning object to control the combustion. When using the dry powder fire extinguisher, it is necessary to spray the flame at a short distance, because the dry powder is easy to disperse and is not suitable for upwind spraying.

其他专用灭火器

Other special fire extinguishers

D类火灾场所（金属火灾场所）需要使用专用灭火器扑灭金属火灾。一些金属，如钠和钾，会与水发生剧烈反应并产生可燃气体。因此，不应使用含水量高的泡沫灭火器。

Class D fire places (metal fire places) need to use special fire extinguishers to put out metal fires. Some metals, such as sodium and potassium, react violently with water and produce combustible gases. Therefore, foam extinguishers with high water content should not be used.

金属火灾专用灭火器主要使用7150灭火剂。7150灭火剂本身是易燃的。发生火灾时，7150灭火剂消耗氧气分解生成硼酸酐，在高温下熔化成玻璃状液体，覆盖在金属表面，其缝隙形成一层薄膜，将金属与氧气隔绝，窒息而死。燃烧。

The special fire extinguisher for metal fire mainly uses 7150 fire extinguishing agent. 7150 fire extinguishing agent itself is flammable. In case of fire, 7150 fire extinguishing agent consumes oxygen and decomposes into boric anhydride. It melts into glassy liquid at high temperature and covers the metal surface. Its gap forms a thin film to isolate the metal from oxygen and suffocate to death. Burning.

以上就是川消厂家为您介绍的是不同灭火器的灭火原理，希望对大家有所帮助，可以关注我们www.cx-fire.com随时了解有关新资讯！

The above is the fire extinguishing principle of different fire extinguishers introduced by Chuanxiao manufacturer. I hope it will be helpful to you. You can pay attention to us at www.cx-fire.com Com keep abreast of new information!