How to handle a hydrogen fire
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This post was last edited by sunjl1981 on 2013-1-6 23:45. How to deal with a hydrogen fire? # + + .
The ignition point of hydrogen has not been determined, and the pressure at which it is released is unknown; it’s difficult to say for sure… For example, things such as the exhaust flues at hydrogen stations, hydrogen dehydration tanks, and pipeline corridors that carry hydrogen gas – in short, it’s crucial to maintain a positive pressure to prevent backflow. “For those that are “simple,” the valve can be closed directly; for more complex cases, coordination between different processes is required. The hydrogen supply unit is responsible for initiating the shutdown process, while the hydrogen delivery unit slowly reduces the pressure. At the same time, nitrogen is introduced to prevent backfire, after which the delivery valve is closed. Being bold, meticulous, and decisive should make things easier to handle.
The key is to continue the circulation while maintaining positive pressure, and then extinguish the fire in case of a power outage.
There are many different scenarios in which hydrogen can catch fire: 1) diaphragm and ion exchange membranes; 2) electrolysis processes, or operations involving hydrogen chloride or hydrochloric acid; 3) whether it’s in pipes, equipment, or vent openings. The general principle in such cases is that the current during electrolysis must not be reduced, and no negative pressure should be created at the site of the fire. High-pressure water should be used, as well as nitrogen or steam valves, until the fire is extinguished (to prevent re-ignition)
You’re all right; it depends on the location. It’s normal for the synthesis furnace to catch fire. Just kidding – it’s essential to prevent backfire. Apart from areas that are still under voltage, water and foam should not be used, and carbon dioxide shouldn’t be used for voltages above 600V. In all other cases, it’s possible to put out the fire first and then shut down the equipment. For things like vent pipes, steam can be used, and asbestos blankets can be applied to flanges, etc
Typically, hydrogen pipelines are equipped with nitrogen purge lines, and the discharge outlets are also connected to steam fire suppression lines.