In the event of a fire in electrical equipment, which fire extinguisher cannot be used to extinguish
In the event of a fire in electrical equipment, ordinary foam fire extinguishers cannot be used to extinguish fires without power failure. 636f70797a6431333431363031
Ordinary foam fire extinguishers cannot be used to extinguish fires of live equipment, otherwise it will threaten personal safety.
The foam fire extinguisher uses the acid solution and the alkaline solution in the cylinder to produce a chemical reaction, and presses the generated foam out of the nozzle and sprays it out to extinguish the fire. In addition to fighting fires of general solid materials, it can also fight fires of combustible liquids such as oils, but it cannot fight fires caused by charged equipment (except special nozzles) and organic solvents such as alcohol, ketones, esters, and ethers (resistant foam Except fire extinguishing agent).
Extended information:
Fire extinguisher classification
There are many types of fire extinguishers, which can be divided into portable type and cart type according to their movement mode; according to the power source of driving fire extinguishing agent, they can be divided into: gas cylinder type, pressure storage type, chemical reaction type; Agents can be divided into: foam, dry powder, alkyl halide, carbon dioxide, water and so on.
1. Dry powder fire extinguisher
Principle: The dry powder fire extinguisher is filled with dry powder fire extinguishing agent. The dry powder fire extinguishing agent is a dry and easy-to-flow fine powder used for fire extinguishing. It is composed of an inorganic salt with fire extinguishing effect and a small amount of additives after drying, crushing and mixing to form a fine solid powder. Use compressed carbon dioxide to blow out dry powder (mainly containing sodium bicarbonate) to extinguish the fire.
Structure: The dry powder fire extinguisher uses carbon dioxide gas or nitrogen gas as the power to spray the dry powder in the bottle to extinguish the fire. Dry powder is a dry, easy-to-flow fine solid powder composed of a base material capable of extinguishing fire, a moisture-proof agent, a flow accelerator, a caking preventive agent and other additives.
2. Foam fire extinguisher
Principle: There are two containers in the foam fire extinguisher, each containing two liquids. They are aluminum sulfate and sodium bicarbonate solutions. The two solutions do not contact each other and do not undergo any chemical reaction. (Do not knock down the foam fire extinguisher at ordinary times.) When the foam fire extinguisher is needed, put the fire extinguisher upside down, and the two solutions are mixed together, and a large amount of carbon dioxide gas will be generated.
In addition to the two reactants, some blowing agents were added to the fire extinguisher. When the switch is turned on, the foam is ejected from the fire extinguisher, covering the burning item, isolating the burning substance from the air, and reducing the temperature to achieve the purpose of extinguishing the fire.
3. Carbon dioxide fire extinguisher
Principle: The liquid carbon dioxide is stored in the bottle of the fire extinguisher. When working, when pressing the handle of the bottle valve. The internal carbon dioxide fire extinguishing agent will be sprayed from the siphon through the bottle valve to the spray cylinder, so that the oxygen concentration in the combustion area will quickly drop. When the carbon dioxide reaches a sufficient concentration, the flame will suffocate and extinguish.
At the same time, liquid carbon dioxide will quickly vaporize and absorb a large amount of heat in a short time, so it has a certain cooling effect on the combustibles and also helps to extinguish the fire. The cart-type carbon dioxide fire extinguisher is mainly composed of a bottle body, a head assembly, a nozzle assembly, a frame assembly, etc. The extinguishing agent inside is a liquid carbon dioxide extinguishing agent.
Structure: The carbon dioxide fire extinguisher barrel is made of high-quality alloy steel through a special process, and the weight is reduced by 40% compared with carbon steel. It has the characteristics of convenient operation, safe and reliable, easy to save, light and beautiful.
Applicable occasions: It is suitable for extinguishing the first fire of flammable liquid and gas, and it can also extinguish the fire of live equipment. It is often used in laboratories, computer rooms, substations, and places with high requirements for the maintenance of precision electronic instruments, valuable equipment, or articles.
Reference source: Baidu Encyclopedia-Foam Fire Extinguisher
Reference source: Baidu Encyclopedia-Fire Extinguisher
Do not use water-based fire extinguishers, it is recommended to use dry powder fire extinguishers and carbon dioxide fire extinguishers!
In the event of a power failure, all fire extinguishers are applicable. The main danger above 600 volts is to prevent electrical breakdown, even carbon dioxide fire extinguishers will conduct electricity and cause accidents!
The principle of fire fighting for electrical fires: first cut off the power and extinguish the fire. The fire extinguisher is configured as a dry powder fire extinguisher or a carbon dioxide fire extinguisher according to the specifications; the power must be cut off before 600 volts or more, and the fire extinguishing is being carried out!
1. Do not use water to extinguish the fire
2. If it is a computer with a display screen, such as a computer or a TV, it cannot be extinguished with carbon dioxide. The temperature of the spray will be minus 73 degrees Celsius and it will explode.
3. Do not spray dry powder on the display screen, spray from the side. Prevent the danger of explosion.
Ordinary foam fire extinguishers cannot be used to extinguish fires of live equipment, otherwise it will threaten personal safety.
The foam fire extinguisher uses the acid solution and the alkaline solution in the cylinder to produce a chemical reaction, and presses the generated foam out of the nozzle and sprays it out to extinguish the fire. In addition to fighting fires of general solid materials, it can also fight fires of combustible liquids such as oils, but it cannot fight fires caused by charged equipment (except special nozzles) and organic solvents such as alcohol, ketones, esters, and ethers (resistant foam Except fire extinguishing agent).
Extended information:
Fire extinguisher classification
There are many types of fire extinguishers, which can be divided into portable type and cart type according to their movement mode; according to the power source of driving fire extinguishing agent, they can be divided into: gas cylinder type, pressure storage type, chemical reaction type; Agents can be divided into: foam, dry powder, alkyl halide, carbon dioxide, water and so on.
1. Dry powder fire extinguisher
Principle: The dry powder fire extinguisher is filled with dry powder fire extinguishing agent. The dry powder fire extinguishing agent is a dry and easy-to-flow fine powder used for fire extinguishing. It is composed of an inorganic salt with fire extinguishing effect and a small amount of additives after drying, crushing and mixing to form a fine solid powder. Use compressed carbon dioxide to blow out dry powder (mainly containing sodium bicarbonate) to extinguish the fire.
Structure: The dry powder fire extinguisher uses carbon dioxide gas or nitrogen gas as the power to spray the dry powder in the bottle to extinguish the fire. Dry powder is a dry, easy-to-flow fine solid powder composed of a base material capable of extinguishing fire, a moisture-proof agent, a flow accelerator, a caking preventive agent and other additives.
2. Foam fire extinguisher
Principle: There are two containers in the foam fire extinguisher, each containing two liquids. They are aluminum sulfate and sodium bicarbonate solutions. The two solutions do not contact each other and do not undergo any chemical reaction. (Do not knock down the foam fire extinguisher at ordinary times.) When the foam fire extinguisher is needed, put the fire extinguisher upside down, and the two solutions are mixed together, and a large amount of carbon dioxide gas will be generated.
In addition to the two reactants, some blowing agents were added to the fire extinguisher. When the switch is turned on, the foam is ejected from the fire extinguisher, covering the burning item, isolating the burning substance from the air, and reducing the temperature to achieve the purpose of extinguishing the fire.
3. Carbon dioxide fire extinguisher
Principle: The liquid carbon dioxide is stored in the bottle of the fire extinguisher. When working, when pressing the handle of the bottle valve. The internal carbon dioxide fire extinguishing agent will be sprayed from the siphon through the bottle valve to the spray cylinder, so that the oxygen concentration in the combustion area will quickly drop. When the carbon dioxide reaches a sufficient concentration, the flame will suffocate and extinguish.
At the same time, liquid carbon dioxide will quickly vaporize and absorb a large amount of heat in a short time, so it has a certain cooling effect on the combustibles and also helps to extinguish the fire. The cart-type carbon dioxide fire extinguisher is mainly composed of a bottle body, a head assembly, a nozzle assembly, a frame assembly, etc. The extinguishing agent inside is a liquid carbon dioxide extinguishing agent.
Structure: The carbon dioxide fire extinguisher barrel is made of high-quality alloy steel through a special process, and the weight is reduced by 40% compared with carbon steel. It has the characteristics of convenient operation, safe and reliable, easy to save, light and beautiful.
Applicable occasions: It is suitable for extinguishing the first fire of flammable liquid and gas, and it can also extinguish the fire of live equipment. It is often used in laboratories, computer rooms, substations, and places with high requirements for the maintenance of precision electronic instruments, valuable equipment, or articles.
Reference source: Baidu Encyclopedia-Foam Fire Extinguisher
Reference source: Baidu Encyclopedia-Fire Extinguisher
Do not use water-based fire extinguishers, it is recommended to use dry powder fire extinguishers and carbon dioxide fire extinguishers!
In the event of a power failure, all fire extinguishers are applicable. The main danger above 600 volts is to prevent electrical breakdown, even carbon dioxide fire extinguishers will conduct electricity and cause accidents!
The principle of fire fighting for electrical fires: first cut off the power and extinguish the fire. The fire extinguisher is configured as a dry powder fire extinguisher or a carbon dioxide fire extinguisher according to the specifications; the power must be cut off before 600 volts or more, and the fire extinguishing is being carried out!
1. Do not use water to extinguish the fire
2. If it is a computer with a display screen, such as a computer or a TV, it cannot be extinguished with carbon dioxide. The temperature of the spray will be minus 73 degrees Celsius and it will explode.
3. Do not spray dry powder on the display screen, spray from the side. Prevent the danger of explosion.
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