Are there any other ways to reduce the concentration of natural gas in the air, besides improving ventilation?
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We are going to conduct a natural gas fire drill, but we are not very familiar with natural gas. In the event of a leak, what can be used to dilute or reduce the concentration of natural gas, so that rescuers can enter the scene as quickly as possible to save those injured?
Reply 1# wwjlovewdm: Cut off the gas supply and enable forced ventilation
Generally, the only solution is to cut off the source; another option is to improve ventilation to dilute the air, as using N2 is too costly!
Reply to 1# wwjlovewdm: First, cut off the source of the leak; use fire sprinklers for protection, dilute it with fire water or steam, and contact a maintenance team as soon as possible for repairs. When working in the leak area, it is necessary to wear a positive-pressure air respirator and use copper tools to prevent sparks from being generated.
After a leak, there is a power outage, shutdown of operations, and interruption of gas supply. In open areas, natural gas rises upward due to its lower density than air； Ventilation should be provided in confined spaces, and the ventilation equipment must be equipped with explosion-proof motors
This post was last edited by qugd on 2011-7-2 21:26. Why not use an active oxygen-supplying respirator? Human lives are at stake – how can there be time to think about diluting it? By the time a solution is found, the people on site will already be dead. To save a life, it is necessary to reach the scene using the most reliable method in the shortest time possible; in such cases, an active oxygen-supplying respirator is used. Safety issues should of course have been taken into account, such as power outages, preventing all vehicles that do not meet safety standards from entering the site, and prohibiting the use of ferrous tools for operations. The boss there is really stupid.
In this situation, the only way to save people is by entering with an oxygen respirator; however, the previous step should have been to cut off the source of oxygen
When there is a large-scale leakage of natural gas, in addition to using high-power explosion-proof fans, fire suppression water is sprayed near the leakage site; this serves both to prevent fires from breaking out and to dilute the natural gas in the air using the water.
Natural gas is insoluble in water, but it is common to see firefighters spraying water into the air after a natural gas leak. This method also serves to accelerate air flow. But it always seems like it doesn’t have much effect. Those who know the answer, please reply. Be more detailed.
Why, when water is used, does natural gas absorb moisture, which increases its weight and causes it to settle to the ground in order to prevent excessive diffusion?
In fact, sometimes letting it burn while ensuring proper cooling is safer; leaks everywhere can lead to explosions