Study On Basic Application Of Fire Extinguishing Agen-Superfine Ammonium Phosphate Dry Chemical

As The behalon extinguishing agent could destroy The Ozonosphere, in dire need of supersession, Fire Extinguishing Agen-Superfine Ammonium Phosphate Dry Chemical(FEASAPDC)is one of the best substitutes.In this dissertation, the key technologies studied were related to engineering application of FEASAPDC:It was studied in this dissertation that the ejection rate of FEASAPDC influenced by the extinguisher structure, the fluidity of extinguishing agent, the storage pressure and the nozzle size. It is shown that the fluidity of extinguishing agent takes the strongest effect on ejection rate. The extinguisher structure and the storage pressure take stronger effect on it. The nozzle size almost has no effect.It was also studied that the distribution character of FEASAPDC in the fire-extinguishing room without fire and the influence of a series of different nozzle hole diameter and ejection pressure by systematically measuring the mass distribution of FEASAPDC in fire-extinguishing room after ejection. The. results show that FEASAPDC make a regular distribution in fire-extinguishing room and the FEASAPDC distribution is more homogeneous when the extinguisher is equipped with smaller nozzle size or higher pressure .It was studied that the fire extinguishing ability of several FEASAPDC in different particle size and its extinguishing rate with different ejection conditions. It is shown that the fire extinguishing ability of FEASAPDC improves with decrease of its particle size. The different ejection conditions have different effect on extinguishing rate. FEASAPDC is most effective for fire extinguishing only in the proper ejection condition.