Where dry powder fire extinguisher?
. Such as sodium bicarbonate dry powder, modified sodium salt powder, potassium salt dry powder, phosphoric acid two ammonium hydrogen dry powder, diammonium phosphate dry powder, phosphoric acid dry powder and amino powder fire extinguishing agent, etc.. Dry powder extinguishing agent mainly through under the action of pressurized gas sprayed powder and mixed flame contact, occurs when the physical and chemical action: one is to rely on the inorganic salt powder volatile decomposition, and fuel combustion in the process of free radicals or reactive group chemical inhibition and side catalytic effect, the the interruption of the chain reaction of combustion fire; two is in the combustible surface by dry powder, chemical reaction, and the formation of a layer of high temperature glass layer to isolate oxygen, then smothering. There is also partial dilution of oxygen and cooling action.
Dry powder extinguisher is filled with dry powder extinguishing agent. Dry powder extinguishing agent is a kind of dry and easy to flow micro powder used for fire extinguishing. It is composed of fine solid powder which is dried, crushed and mixed by inorganic salts and a small amount of additives with extinguishing effect. It is a fire extinguishing agent widely used in fire fighting, and is mainly used in fire extinguishers. In addition to extinguishing the metal fire special dry chemical fire extinguishing agent, dry powder fire extinguishing agent is generally divided into two categories: BC dry powder extinguishing agent and ABC dry powder.
The most commonly used method for powder extinguishing opening for the method, will be away from the fire extinguisher to the appropriate distance, first upside down several times, the barrel of loose powder, and then let the combustion nozzle at the most violent, to pull the pin and press down and emit fire extinguishing agent. In addition, the rotation method can also be used. Open dry powder, left hand hold one department, the nozzle at the bottom of flames, right hand pull card, open knob clockwise, open the bottle, the lag time of 1-4 seconds, dry and emit fire.
