Fire extinguisher use method
1. Lift dry powder fire extinguisher
Extract the fire extinguisher upside down twice to the fire extinguishing site, unplug the safety pin, hold the nozzle in one hand and aim at the root of the flame, and press the pressure handle with one hand. When extinguishing fire, it should be abandoned once; when using it outdoors, it should stand at the upwind of the fire source, from near to far, sweeping left and right, and pushing forward to prevent the flame from returning.
2, portable 1211 fire extinguisher
First remove the safety pin, then open the pressure handle with one hand, and hold the handle of the horn spray barrel with the other hand.
The fire extinguisher can be sprayed out using the method. (Currently, the country gradually restricts its use, mainly because halogenated alkane pollutes the atmosphere and is harmful to humans.) Now carbon dioxide fire extinguishers are gradually replacing 1211 fire extinguishers in the same way as the 1211 fire extinguishers. However, in the use of carbon dioxide, you must take care not to hold the nozzle or touch the mouth to prevent frostbite.
3, 35kg trolley type dry powder fire extinguisher
Two people operate, one removes the spray gun, unfolds the hose, and then holds the trigger by hand; the other pulls out the safety pin of the opening mechanism and quickly opens the opening mechanism of the fire extinguisher.
4, foam fire extinguisher
The fire extinguishing fluid of the foam fire extinguisher consists of aluminum sulfate, sodium hydrogencarbonate and liquorice. When the fire is extinguished, the foam fire extinguisher is turned upside down, and the foam can be sprayed out to cover the fire to achieve the purpose of fire extinguishing. Suitable for extinguishing fires in barreled oil, pipelines and floors. Not suitable for fires in electrical equipment and precision metal products.
5, carbon tetrachloride fire extinguisher
After gasification of carbon tetrachloride, it is a gas that is colorless, transparent, non-conductive, and denser than air. When extinguishing the fire, turn the fuselage upside down, the nozzle down, and open the hand valve to spray it to the flame to extinguish it. Suitable for extinguishing fires in electrical equipment and valuable equipment. Carbon tetrachloride is very toxic, and users should stand on the upper vent. Indoors, ventilation should be carried out in time.
6, carbon dioxide fire extinguisher
Carbon dioxide is a non-conductive gas that has a higher density than air and is liquid at high pressures inside the cylinder. When extinguishing a fire, simply turn the switch, and the carbon dioxide is sprayed on the fire object in a state of airflow to isolate the air and extinguish the flame. Suitable for small-area fires in precision instruments, electrical equipment, and oil testing laboratories. When carbon dioxide changes from a liquid state to a gaseous state, it absorbs a lot of heat, and the temperature is extremely low (up to -80 ° C), and frostbite should be avoided. At the same time, although carbon dioxide is non-toxic, it has a suffocating effect and should be avoided as much as possible.
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