。在常壓下，液態(tài)的二氧化碳會(huì)立即汽化 二氧化碳滅火劑GB 4396-2005 測試譜圖：




Carbon dioxide fire extinguishing agent GB 4396-2005
Carbon dioxide fire extinguishing agent GB 4396-2005 detailed information:

Name: Capillary Column
Specification: 15m*0.53mm*50um
Model: HH-PLOT molecular sieve 5A


The carbon dioxide fire extinguishing agent is pressurized and filled in the fire extinguisher in liquid form. Due to the high equilibrium vapor pressure of carbon dioxide, as soon as the bottle valve is opened, the liquid immediately passes through the siphon, pipe and nozzle and sprays out through the nozzle, and the liquid carbon dioxide is quickly vaporized. It absorbs a lot of heat from the surrounding air, (578KJ of heat is required for the gasification of 1 kg of liquid carbon dioxide). However, because the spray tube isolates the heat conduction to the outside, when the carbon dioxide is gasified, it can only absorb its own heat. As a result, the temperature of the liquid itself drops sharply. When its temperature drops to minus 78.5 degrees Celsius (sublimation point), fine snowflake-like carbon dioxide solids appear. Therefore, the low-temperature gas and solid carbon dioxide sprayed out by the fire extinguishing agent, although the temperature of carbon dioxide is very low, has a certain cooling effect on the burning material, but this effect is far from enough to extinguish the flame.
Its fire extinguishing effect is mainly to increase the non-combustible and non-combustible components in the air, and reduce the oxygen content in the air. Experiments show that the concentration of oxygen in the air in the combustion zone is less than or equal to 12%, and the concentration of carbon dioxide is% At 30 to 35 percent, most of the combustion will go out.
Carbon dioxide has a higher density, about 1.5 times that of air. Under normal pressure, liquid carbon dioxide will vaporize immediately. Generally, 1kg of liquid carbon dioxide can produce about 0.5 cubic meters of gas. When extinguishing a fire, carbon dioxide gas can exclude air and surround the surface of the burning object or distribute it in a more confined space, reducing the oxygen concentration around the combustible or in the protective space, resulting in asphyxiating effect and extinguishing the fire. In addition, when carbon dioxide is ejected from the storage container, it will quickly vaporize from the liquid into a gas, attracting part of the heat from the surroundings, and play a cooling role.

Haohan Chromatography (Shandong) Applied Technology Development Co., Ltd. keeps pace with the times and uses capillary columns to determine carbon dioxide fire extinguishing agents. The area normalization method is used for quantification, and the results are accurate and reliable.

Carbon dioxide fire extinguishing agent GB 4396-2005 test spectrum: