基于冷冻干燥共结晶工艺的热气溶胶灭火剂

利用冷冻干燥共结晶工艺改善热气溶胶灭火剂的燃烧与灭火性能.将硝酸钾按照45％～60％递增、乳糖按照55％～40％对应递减的8组比例进行共结晶工艺处理,并与机械混合的同样比例成份的热气溶胶灭火剂进行灭火效率对比分析.灭火性能测试结果表明,共结晶工艺可以使热气溶胶灭火剂的喷射时间和灭火时间显著缩短,硝酸钾和乳糖质量比为4....

Hot aerosol extinguishing agent based on freeze-drying co-crystallization process

Toimprove the combustion and fire- extinguishing performance of hot aerosolextinguishing agents (HAEAs), a new type of HAEA was prepared by freeze-dryingco-crystallization process in this paper. Eight groups of HAEAs with anincreasing mass ratio of 45% ~ 60% potassium nitrate and a decreasing massratio of 55% ~ 40% lactose were co- crystallized and compared with themechanically mixed HAEAs of the same composition and proportion. The results offire- extinguishing performance test show that the co- crystallization processcan significantly shorten the extinguishing time of the HAEAs. The fire-extinguishing effect was best when the ratio of potassium nitrate to lactosewas 4.75:4.25, and the fire-extinguishing time was shortened from 6.91s to 1.00s. The co- crystallized products were characterized by scanning electronmicroscope (SEM), thermal analysis (TG/DSC), powder X- ray diffraction (PXRD),and Fourier transform infrared reflection (FTIR). The results indicated thatthere were co-crystallized products different from raw materials.