气体可燃浓度极限测试系统的优化设计

Design of an Experimental System for Flammability Limit Measurement of Gases

可燃浓度极限是影响可燃气体危险等级和安全管理的关键物性参数。基于“球型玻璃烧瓶”测试法,结合科研教学实践需求,优化设计了一套气体可燃浓度极限测试系统。通过优化系统布局、点火源、待测样气配置、反应条件调控、及实验后处理流程,使得整套测试系统在实操中表现出具有良好性能。以二甲醚为标定对象,该研究实测可燃浓度极限值与六篇参考文献值的平均相对误差仅2.19%。

The flammability limit of a flammable gas is the key property that influences the hazard level and security management of the gas.An experimental system for flammability limit measurement of gases is designed based on the“glass flask”experimental method,as the practical requirements of teaching and researching.The overall layout,ignition resource,sample preparation,reaction condition adjustment,and the postprocessing are improved.Consequently,the whole experimental system shows a good performance during the applicatory operation.Taking dimethyl ether as the testing object to calibrate the experimental system,and it is resulted that the average relative error is only 2.19%between the measured flammability limit and the data from six references.