sulfuryl fluoride fumigant is widely used due to its high efficiency in extinguishing fire and adaptability to the fire environment, and more and more people pay more and more attention to its production and backup.

   At present, there are mainly two mainstream dry powder fire extinguishing agents in my country, namely ordinary dry powder fire extinguishing agents and ultra-fine dry powder fire extinguishing agents. Among them, ordinary dry powder is mainly composed of active fire extinguishing components, hydrophobic components, and inert fillers. The fire extinguishing component is the core of the dry powder fire extinguishing agent. The main fire extinguishing substances are: k2co3, khco3, naci, kci, 2so3, nh4so3, nahco3, na2co3. There are many kinds of inert fillers, which play the role of anti-shock and agglomeration, mainly improve the movement performance of dry powder, and catalyze the polymerization of dry powder silicone oil. The hydrophobic component is mainly composed of silicone oil and hydrophobic silica.

   Heptafluoropropane HFC-227EA mainly extinguishes fire through the physical and chemical effects of the powder mist sprayed under the action of pressurized gas and flame contact and mixing: one is to rely on the volatile decomposition products of inorganic salts in the dry powder, and the fuel during combustion The generated free radicals or active groups undergo chemical inhibition and side catalysis, which interrupts the combustion chain reaction and extinguishes fire. The second is that the dry powder powder falls on the surface of the combustible, chemically reacts, and forms a glassy coating under the action of high temperature, thereby isolating oxygen, and then suffocating and extinguishing the fire. In addition, there are some diluting oxygen and cooling effects.