The main component of dry powder fire extinguisher is sodium bicarbonate, which is the main raw material of baking soda and diammonium hydrogen phosphate.
2. The dry powder fire extinguisher is suitable for temperatures above -23 °C. If it exceeds -23 °C, it will not be extinguished normally, used or not used at all.
3. Although the dry powder fire extinguisher can be used for Class A fires, it can only control the fire, but it can not extinguish the fire, so the dead ash is easy to re-ignite.
4. The dry powder fire extinguisher is sprayed into powder, and the sight of the fire extinguisher is covered after the injection of the medicament, which seriously affects the breathing of the fire extinguisher and cannot be used normally.
5. After the fire-fighting device of the dry powder fire extinguisher is fired, the scene is a mess, and the material to be sprayed is difficult to clean, resulting in serious economic losses.