臭氧对煤粉燃烧的影响

Effect of ozone on coal combustion

根据强紫外线辐射空气可产生臭氧的原理,将经紫外辐射后的空气通入热天平与煤粉发生燃烧反应,采用热分析方法研究臭氧对煤粉燃烧的影响.实验表明紫外辐射空气得到的少量臭氧使煤粉燃烧的失重和放热时间提前.对煤粉燃烧的动力学进行分析,结果显示臭氧使煤粉燃烧反应的活化能降低.紫外线激发高温氧气产生氧原子的热力学计算结果表明:温度越高,氧分子越容易被紫外线激发为氧原子.提出了使用强紫外线辐射热风促进高炉喷煤燃烧的设想.

With the principle that ozone generates when air is exposed to strong UV radiation, UV-radiated air flowed into a thermobalance to react with pulverized coal. The thermal analysis method was used to study the effect of ozone on coal combustion. It is showed that small amount of ozone can advance the burning time and the weightlessness time of pulverized coal. Dynamics analysis reveals that ozone decreases the activation energy of pulverized coal combustion reaction. Thermodynamic calculations show that the higher the temperature is, the more easily the oxygen atoms are stimulated by oxygen molecules exposed to UV radiation. The idea is proposed that strong UV-radiated hot blast air flow should be used to increase the combustion efficient of injected coal for a blast furnace.