1, fire extinguishing principle
Dry powder fire extinguisher mainly uses dry powder fire extinguishing agent to form a layer of diaphragm on the fire source, thus preventing oxygen from entering the fire source, which can effectively achieve the purpose of fire extinguishing. Carbon dioxide fire extinguisher uses high pressure to inject carbon dioxide gas into the fire source to squeeze out oxygen from the fire source and finally extinguish the flame.
Step 2 use the scene
Dry powder fire extinguishers are suitable for extinguishing solid, liquid and gas fire sources, such as oil, wood and paper. Carbon dioxide fire extinguishers are mainly used to extinguish fire sources such as electrical equipment and precision instruments.
3. Safety
Dry powder fire extinguisher may be sprayed on human body or eyes during use, causing discomfort or injury. The carbon dioxide fire extinguisher is relatively safe, because it does not contain harmful chemicals and will not spray on the human body or eyes.