subject: Tips: The Principle Of Four Fire Extinguishers And How To Use [print this page] A carbon dioxide fire extinguishers fire fighting principles and use that?
Carbon dioxide fire extinguishing agent is a hundred years of history with the fire extinguishing agent, low cost, access, preparation is easy, its main role and part of the cooling depend on the role of suffocation fire. High density of carbon dioxide, about 1.5 times the air. Under normal pressure, liquid carbon dioxide will immediately vaporized, the general can produce 1kg of liquid carbon dioxide about 0.5 cubic meters of gas. Thus, fire, carbon dioxide gas can exclude air and surrounded by burning the surface of an object or distributed in a more confined space, the lower flammable or protective space around the oxygen concentration, resulting in a stifling effect on the fire. In addition, the carbon dioxide emitted from the storage container, the rapid evaporation from liquid into gas, which attracted some of the heat from the surrounding, play the role of cooling.
Carbon dioxide fire extinguisher put out expensive equipment used, the file information, apparatus, 600 V the following
Electric Early fire equipment and oil. In use, should first be referred to a fire extinguisher locations, fire extinguisher down, pull the pin, a hand holding a megaphone root handle, open and close the other hand grip
Valve Pressure to. The absence of carbon dioxide fire extinguisher spray hose should pull up the megaphone 70? 90 degrees. Use, can not directly hand to seize the megaphone outside wall or metal connecting pipe to prevent the hand was freezing. When using carbon dioxide fire extinguisher, in outdoor use, and should choose the direction of spray upwind; narrow space in the indoor use, the operator shall promptly after the fire left, to prevent suffocation. Portable fire extinguishers are filled generally Extinguishing agents within one minute of time, the only practical and effective extinguishing time of 10 to 20 seconds, in the actual use of the process, need to know to use, or can not fire not only destroyed, but also bungled the fire time.
Must be pointed out that the fire after the early use of fire extinguishers put out the fire in time, is to avoid the fire spreading, expanding and causing greater loss of effective measures. Also, once discovered fire, the fire department should immediately prompt
Alarm , Must not expect to fire extinguishers fire fighting without alarm, as fire extinguishers put out the fire area and capacity is limited, and only beginning to adapt to fighting the fire. After the fire, generally faster than the spread, alarm time delay and waste of the fire fighters, will inevitably lead to greater losses.
II Dry powder fire Principles and use of fire fighting device is what?
Fire extinguisher in filling the dry powder extinguishing agent. Dry powder fire extinguishing agent is used for drying and easy flow of fine powder from a fire performance of inorganic salts and small amounts of
Additive After drying, grinding, composed of a mixture of fine solid powder. It is a widely used fire extinguishing agent, and is mainly used in fire extinguishers. In addition to the special dry powder fire fighting metal chemical fire extinguishing agent, the dry powder fire extinguishing agent is generally divided into BC and ABC dry powder fire extinguishing agent into two categories. Such as sodium bicarbonate dry powder, dry powder modified sodium, potassium dry powder, dry ammonium dihydrogen phosphate, diammonium phosphate powder, phosphoric acid and amino dry powder extinguishing agent. Mainly by dry powder fire extinguishing agent under pressure exhaust gas and flame powder mist touch the mixing of physical and chemical reaction fire: first, from dry powder of the inorganic salts of volatile decomposition products, and fuel the combustion process free radicals or reactive groups on the chemical inhibition and vice catalyst for the interruption of the burning fire chain reaction; second is by dry powder falls on the surface of fuel, the chemical reaction and the formation of a layer under high temperature glassy coating, which cut off oxygen, and then suffocate fire. In addition, part of the dilution of oxygen and cooling.
Dry powder fire extinguishers most commonly used method for the pressure to open the law to fire extinguisher referred to an appropriate distance from the fire, the first upside down several times, so that cylinder with loose powder, then let the nozzle aligned the most severe burn Department, pull to the pin, pressure pressure to, fire extinguishing agent will be ejected. Another rotation method can also be used. Open dry powder fire stick, the left hand holding them, they will be aligned nozzle flame root, right hand pull the insurance card, open the knob clockwise to open the storage cylinder, Delay 1-4 seconds, dry powder fire fighting will be ejected .
3, water fire extinguisher fire fighting principles and use that?
Water for fire extinguishers in the fire extinguishing agent to clean water.
Tips: The Principle Of Four Fire Extinguishers And How To Use
