不同滅火器的滅火原理有關內容點
來源：http://m.xintli.net/ 日期：2022-05-24
泡沫滅火器
Foam fire extinguisher
泡沫滅火器主要依靠二氧化碳泡沫滅火。滅火器內裝有飽和碳酸氫鈉溶液和飽和硫酸鋁溶液。使用前需要將滅火器倒置，使兩種溶液接觸并發生水解反應，從而產生大量二氧化碳和氫氧化鋁。降水、二氧化碳不助燃，比空氣重。當二氧化碳附著在燃燒物表面時，會隔絕外界氧氣，阻止燃燒物燃燒。水解反應產生的氫氧化鋁還可以覆蓋燃燒物，提高滅火效果。
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.
水式滅火器
Water fire extinguisher
水式滅火器主要部署在甲類火場，即固體物質火場。燃燒材料通常包括木材、干草、棉花、羊毛、麻、紙等。
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.
水式滅火器包括清水滅火器和酸堿滅火器。清水滅火器主要依靠冷卻和窒息，即液態水汽化時，吸收大量熱量，使環境溫度下降，冷卻燃燒物來滅火。另外，液態水汽化后的水蒸氣是一種惰性氣體，其體積會膨脹約1700倍，水蒸氣可以稀釋燃燒物周圍的氧氣含量，隔絕外界氧氣，從而達到滅火的目的。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.
干粉滅火器
Dry powder fire extinguisher
根據滅火器的不同，干粉滅火器可分為磷酸銨干粉滅火器和碳酸氫鈉干粉滅火器。磷酸銨干粉滅火器可用于撲滅A、B、C、E類火災。撲滅B級、C級和E級火災；干粉滅火器的滅火原理是：干粉很細，可以附著在燃燒物體的表面來控制燃燒。使用干粉滅火器時，需要近距離噴射火焰，因為干粉易分散，不適合逆風噴射。
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.
其他專用滅火器
Other special fire extinguishers
D類火災場所（金屬火災場所）需要使用專用滅火器撲滅金屬火災。一些金屬，如鈉和鉀，會與水發生劇烈反應并產生可燃氣體。因此，不應使用含水量高的泡沫滅火器。
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.
金屬火災專用滅火器主要使用7150滅火劑。7150滅火劑本身是易燃的。發生火災時，7150滅火劑消耗氧氣分解生成硼酸酐，在高溫下熔化成玻璃狀液體，覆蓋在金屬表面，其縫隙形成一層薄膜，將金屬與氧氣隔絕，窒息而死。燃燒。
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.
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 m.xintli.net Com keep abreast of new information!
