At present, the preliminary investigation results show that Meng Xiangjian was doing hydrogen experiments in the laboratory at the time of the incident. A chemical expert who once participated in the formulation of the Regulations on the Safety Management of Hazardous Chemicals told the reporter of Beiqing Daily that there might be "leakage" in the laboratory at that time.
"Generally speaking, the hydrogen in the laboratory is stored in cylinders. There are valves, pressure gauges and flow meters above the steel cylinder. These all have interfaces. If these interfaces are not tightly closed before entering the laboratory or after the last use, there will be a' leakage point', which will lead to hydrogen leakage, gathering indoors and exploding after encountering an open flame. "
Experts say that the violent oxidation of hydrogen will produce a powerful shock wave. "If you are hit by a shock wave on a wall or other hard objects, you may die."
According to experts' analysis, the cause of the fire after the explosion in the laboratory may be that the high temperature generated after the hydrogen explosion met flammable substances in the laboratory, "such as wooden things, or documents and books piled up indoors."
In addition, chemical experts said that at present, the safety facilities of the laboratory may not be perfect. "As a dangerous chemical, hydrogen should be equipped with monitoring probes like flammable and toxic gases to give an alarm before reaching the explosion point. In addition, it should be equipped with an explosion-proof strong exhaust device to evacuate flammable and explosive gases indoors in time. "
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