干粉灭火器内充装的是磷酸铵盐干粉灭火剂。干粉灭火剂是用于灭火的干燥且易于流动的微细粉末，由具有灭火效能的无机盐和少量的添加剂经干燥、粉碎、混合而成微细固体粉末组成。它是一种在消防中得到广泛应用的灭火剂，且主要用于灭火器中。除扑救金属火灾的专用干粉化学灭火剂外，干粉灭火剂一般分为BC干粉灭火剂（碳酸氢钠等）和ABC干粉（磷酸铵盐等）两大类。
The dry powder extinguisher is filled with ammonium phosphate dry powder extinguisher. Dry powder extinguishing agent is a kind of dry and flowable fine powder used for extinguishing fire. It consists of mojugl.37ix.com.cnmojugt.37ix.com.cnmojuhfc.37ix.com.cnmojugsa.37ix.com.cn liuliangwl.37ix.com.cnpeidianjl.37ix.com.cninorganic salts with extinguishing efficiency and a small amount of additives which are dried, crushed and mixed to form fine solid powder. It is a widely used fire extinguishing agent in fire fighting, and is mainly used in fire extinguishers. In addition to special dry powder chemical fire extinguishers for metal fires, dry powder fire extinguishers are generally divided into BC dry powder extinguishers (sodium bicarbonate, etc.) and ABC dry powder (ammonium phosphate, etc.).
一是靠干粉中的无机盐的挥发性分解物，与燃烧过程中燃料所产生的自由基或活性基团发生化学抑制和负催化作用，使燃烧的链反应中断而灭火；
Firstly, the volatile decomposition of inorganic salts in dry powder can cause chemical inhibition and negative catalysis with free radicals or active groups produced by fuel during combustion, which can interrupt the chain reaction of combustion and extinguish fire.
二是靠干粉的粉末落在可燃物表面外，发生化学反应，并在高温作用下形成一层玻璃状覆盖层，从而隔绝氧，进而窒息灭火。另外，还有部分稀释氧和冷却作用。
The second is that the powder of dry powder falls on the surface of combustible material, reacts chemically, and forms a glass-like covering layer under the action of high temperature, thus isolating oxygen and suffocating fire extinguishing. In addition, there are some dilution of oxygen and cooling effect.
分类
classification
干粉灭火器可分为ABC类和BC类二种。
Dry powder fire extinguishers can be divided into ABC and BC categories.
按操作方式分手提式干粉灭火器和推车式干粉灭火器。
Separate the portable dry powder extinguisher and the cart dry powder extinguisher according to the operation mode.
按充装干粉灭火剂的种类可以分为普通干粉灭火器和超细干粉灭火器。
According to the types of filling dry powder extinguishers, they can be divided into ordinary dry powder extinguishers and ultra-fine dry powder extinguishers.
NaOH+AlCl3+2NaHCO3====Al(OH)3↓+2CO2↑+3NaCl
NaOH+AlCl3+2NaHCO3====Al(OH)3+2CO2+3NaCl