Safety Life Cheaper Option Fire Extinguisher Powder Used in Classroom

Due to its large specific surface area and high activity, ultrafine fire extinguishing particles can be suspended in the air for several minutes to form relatively stable aerosols. Therefore, not only the fire extinguishing efficiency is very high, but also the use method is completely different from the general traditional dry powder fire extinguishing agent, which is similar to the haloalkane flooding fire extinguishing. For example, the extinguishing concentration of KHCO3 aerosol is only 2.0% of 1301 halogenated alkane, but its extinguishing efficiency is 50 times that of it, and the sediment after extinguishing is not obvious, causing little pollution to the fire site. KHCO3, NaCl, KCl, K2SO4, NH4H2PO4 and NaHCO3 can be used to prepare aerosol fire extinguishing agent. The particle size of aerosol fire extinguishing agent shall be less than<5 μ m. Better less than 0.5 μ m. Aerosol has become an independent new research field.

Ordinary dry powder extinguishing agent is mainly composed of active extinguishing component, hydrophobic component and inert filler. The hydrophobic component mainly includes silicone oil and hydrophobic white carbon black. There are many kinds of inert filler, which mainly play the role of anti vibration compaction, caking, improving the movement performance of dry powder, catalyzing the polymerization of dry powder silicone oil and improving the compatibility with foam extinguishing agent. This kind of common dry powder fire extinguishing agent has been widely used at home and abroad.