Can improper use of carbon dioxide fire extinguisher frostbite fingers?

Yes, because dry ice (solid carbon dioxide) absorbs a lot of heat during gasification, resulting in local low temperature.

At normal pressure, liquid carbon dioxide will vaporize immediately. Generally 1kg liquid carbon dioxide can produce about 0.5 cubic meters of gas. Therefore, when putting out a fire, carbon dioxide gas can exclude air and surround the surface of the combustion product or distribute in a relatively closed space, thus reducing the oxygen concentration around the combustible or in the protective space, causing suffocation and extinguishing the fire.

In addition, when carbon dioxide is ejected from the storage container, it will quickly vaporize from the liquid into gas, and absorb some heat from the surrounding area to cool down.

Extended data:

1, fire extinguishing principle

When pressurized, liquid carbon dioxide is compressed in a small steel cylinder, and then sprayed out when extinguishing fire, which plays the role of cooling and isolating air, and finally achieves the role of extinguishing fire.

2. How to use it

Pull out the safety pin first, then press the handle, aim the nozzle at the root of the flame and spray.

3. Preventive measures

When using, try to avoid skin frostbite caused by direct contact with the nozzle and spray hose. When putting out an electrical fire, if the voltage exceeds 600 volts, remember to cut off the power supply before putting out the fire.

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