高原低气压环境室内富氧的安全氧气体积分数上限

Maximum safe concentration of oxygen-enriched atmosphere in high altitude

为了解决高海拔地区的富氧安全问题,通过实验模拟高原低气压环境,研究了滤纸、棉布和涤卡在富氧环境下燃烧速度的变化情况.由实验可得,氧分压不变时,随着海拔的升高,材料的燃烧速度显著加快.结果表明,在高海拔地区,富氧到与一个标准大气压中氧分压一致,会产生火灾危险.通过对实验数据的分析,得出了高原低气压环境下室内富氧的安全氧浓度上限.

In order to reduce the possibility of fire hazards in oxygen-enriched atmosphere, the burning rate of thin materials such as filter paper, cotton fabric and Dacron khaki in low barometric pressure and oxygen-enriched atmosphere was studied experimentally. The results show that the burning rate increases significantly with increasing altitude when the partial pressure of oxygen is constant. It is indicated that fire hazards will be caused in high altitude if the oxygen partial pressure is increased up to the oxygen partial pressure under the condition of the standard atmospheric pressure. The maximum safe concentration for oxygen-enrichment in high altitude was obtained from the analysis of experiment results.