Difference between carbon dioxide fire extinguisher and dry powder fire extinguisher
The pressurized liquid carbon dioxide compression in Xiaogang bottle, when the fire extinguishing spray, has the effect of cooling and air isolation.
One is the volatile decomposition of inorganic salts by dry minutes, which is chemically inhibited and negatively catalyzed by free radicals or active genes produced by fuel during combustion, so that the combustion chain reaction is interrupted and the fire is put out. Two is the powder that relies on the powder that falls on the surface of the fuel. A chemical reaction occurs and a glassy coating is formed under high temperature to isolate oxygen and then to smother fire. There is also partial dilution of oxygen and cooling action.
Dry powder fire extinguisher：Dry powder fire extinguishers can extinguish general fires, and can also extinguish fires caused by oil, gas, and other fires. The utility model is mainly used for fighting the initial fire of flammable liquids, combustible gases and electrical equipment such as petroleum, organic solvent, etc..Carbon dioxide extinguisher:It is suitable for fighting B fire, such as kerosene, diesel oil, crude oil, methanol, ethanol, bitumen, paraffin and so on C fires (such as gas, natural gas, methane, ethane, propane, hydrogen, etc) are suitable for fighting fires Fire E fire.
Dry powder fire extinguisher：The most common opening method of dry powder fire extinguishers is press handle. The fire extinguisher to distance from the appropriate location, first upside down several times, the barrel of loose powder, and then make the most violent on burning nozzle, pull out the pin and press down and emit fire extinguishing agent. When the powder fire extinguishing rod is opened, the left hand holds the part, the nozzle is aimed at the root of the flame, the right hand is pulled out the safety card, the rotary turning knob is opened, and the gas storage bottle is opened, and the stagnation time is 1-4 seconds. Dry powder will spray fire.Carbon dioxide extinguisher:Bring the extinguisher to the fire place, put down the fire extinguisher, pull out the safety pin, one hand holding the microphone root of the handle, the other hand hold the valve opening and closing pressure. No spray hose carbon dioxide extinguisher, should pull 70-90 megaphone online. When in use, can not directly use the hand to hold the outer surface of the cylinder or the metal connecting pipe, to prevent hand frostbite. In the use of carbon dioxide fire extinguishers, outdoor use, should choose upwind direction spray; in indoor narrow space use, after fire, the operator should leave quickly, in case of suffocation.
