To overcome the shortcomings of phosphorus-containing compounds (PCCs, not widely used) in fire suppression, the dry water powder containing phosphoric acid was analyzed for a new fire suppressant (SiO₂-P). First, the fine conditions (solid-to-liquid ratio, stirring time and stirring speed) were determined to prepare the new powder. The particle size distributions and XPS of SiO₂-P powder were analyzed. The TG tests were conducted to study the decomposition of powder, and there was a major decomposition peak. Second, the extinguishing time of SiO₂-P powder was tested, which showed that the SiO₂-P powder containing phosphorus species could significantly improve the fire suppression ability. In addition, the kinetic parameters of powder decomposition reaction were determined by genetic algorithm based on TG results. Last, based on the decomposition products and kinetic parameters, the burning velocity and mass fraction of free radicals of CH₄/air flame with SiO₂-P powder addition were studied theoretically. The results indicated that SiO₂-P powder had great ability of reducing the burning velocity and scavenging free radicals. Furthermore, the suppression effects were analyzed, which indicated that the cooperation of H₂O and P suppression effect dominated the suppression mechanism and resulted in the good suppression efficiency.

为了克服含磷化合物（PCC，未广泛使用）在灭火中的缺点，分析了含磷酸的干水粉作为新型灭火剂（SiO ₂ -P）。首先，确定精细条件（固液比，搅拌时间和搅拌速度）以制备新粉末。分析了SiO ₂ -P粉末的粒度分布和XPS 。进行了TG测试以研究粉末的分解，并且存在主要的分解峰。其次，测试了SiO ₂ -P粉末的熄灭时间，结果表明SiO ₂含磷物质的-P粉末可显着提高灭火能力。另外，基于TG的结果，通过遗传算法确定了粉末分解反应的动力学参数。最后，基于分解产物和动力学参数，从理论上研究了添加SiO ₂ -P粉体的CH ₄ /空气火焰的燃烧速度和自由基的质量分数。结果表明，SiO ₂ -P粉末具有降低燃烧速度和清除自由基的能力。此外，分析了其抑制作用，表明H ₂的协同作用O和P的抑制作用主导了抑制机理，并产生了良好的抑制效率。