Which fires can be used by CO2 extinguishing systems

The commonly used gas fire extinguishing agent for gas fire fighting is carbon dioxide, halide alkanes), inert gases (Ig541, Ig55, Ig01, Ig100), and similar gas substitutes (HFC) for gas spraying and extinguishing fires. Where the outlet of the self-extinguishing agent injection device can spray out a gaseous medium and be used to extinguish the fire, in addition to the above-mentioned commonly used gas fire extinguishing agent, there are also materials such as water vapor, combustion exhaust gas, aerosol and other materials, which can be classified as gas fire extinguishing agent. If you want to know more about it, you can consult Shanghai Haiyue safety engineering equipment****, thank you!

The function of the foam fire extinguisher is: When using the foam fire extinguisher to extinguish the fire, it can spray a large amount of carbon dioxide and foam, which can adhere to the combustibles, so that the combustibles are isolated from the air to achieve the purpose of extinguishing the fire. Scope of the fire:

1. Class A solid fires, such as wood, cotton and other solid substances; Class B substances such as gasoline, kerosene, vegetable oil, etc. 2. Class B fires, such as gasoline, diesel and other liquid fires (high-multiples foam fire extinguishers) 3. Class E live equipment depends on the situation, if it is low-voltage electrical equipment, there is no problem, such as the computer system host room, general small equipment. Foam extinguishing agents are divided into high multiple foam and low multiple foam.

The foaming ratio of high-multiples foam fire extinguishing agent is high (201-1000 times), which can quickly fill the fire space in a short time, especially suitable for large-space fires, and has the advantages of rapid fire extinguishing; The low-multiples foam mainly relies on the foam to cover the surface of the fire object, isolate the air and extinguish the fire, and accompanied by water stains, it is powerless for the flowing fire, because there is water, if it is used to extinguish the live fire, then there is an electric shock and leakage disaster.

Types of fires that cannot be extinguished with CO2 fire extinguishers:

1. It cannot be used to extinguish the fire of Class B substances;

2. It cannot be used to extinguish Class C flammable gases;

3. It cannot be used to extinguish Class D light metals (including:

aluminum, sodium, potassium, magnesium, lithium, antimony, cadmium, uranium, plutonium and other metals) fires;

4. At the same time, it cannot be used for the extinguishing of live object fire (class E).

The types of fires are divided into six categories: ABCDEF.

1. Class A: solid matter fire, generally carbonaceous solid matter fire;

2. Category B: liquid fires and meltable solid matter fires;

3. Class C: gas fire;

4. Class D: metal fire;

5. Class E: fire of live equipment;

6. Category F: fire of animal and vegetable oils and fats in the pot.

Note: If the electricity is not electrified, it is a Class A fire, and if it is live, it is a Class E fire.

Answer]: C Diode carbon fire extinguishing system application site: (1) oil-immersed transformer room, high-voltage capacitor room equipped with fuel, multi-oil switch and generator room, etc.; (2) Precision instrument room and valuable equipment room of telecommunications, radio and television building, large and medium-sized electronic computer room, etc.; (3) Gas stations, archives, cultural relics reference rooms, library treasure rooms, etc.; (4) Large and medium-sized ship cargo holds and oil tanker oil tanks, etc.

Carbon dioxide non-nuclear deficit is suitable for extinguishing fires of reactive metals and their hydrides (such as lithium, sodium, magnesium, aluminum, sodium oxide, etc.), chemical fires that can supply oxygen by themselves (such as nitrocellulose and gunpowder, etc.), and chemical fires that can decompose and supply oxygen by themselves (such as hydrogen peroxide, etc.).

Carbon dioxide fire extinguishers are suitable for extinguishing Class B, Class C, Class C and other fires.

Among them, Class B fire refers to the fire caused by kerosene, diesel, methanol, ethanol, etc., Class C fire refers to the fire caused by gas, natural gas, methane, ethane, propane, etc., and Class E fire refers to the fire of the object with charged combustion, in addition to being used to extinguish the fire of books, archives, valuable equipment, etc.

Cooling fire extinguishing method is to directly spray the fire extinguishing agent to the burning object, to reduce the combustion temperature of the object, and below the ignition point, to achieve the purpose of combustion stop, this method is generally suitable for carbon dioxide fire extinguishers or water, belongs to the physical way of fire extinguishing, and can also avoid the radiation of flame heat to form a new fire point.

Carbon dioxide fire extinguishers are suitable for fighting Class A, B, C, and E fires, and are not suitable for Jinheng Dan fires. Class A fires refer to fires formed by the burning of solid materials, such as wood, cloth, plastic, etc. Class B fires refer to liquid fires and fires of soluble solid substances, such as fires formed by the combustion of flammable and flammable liquids and asphalt, paraffin, etc.

Class C fires refer to gas fires, such as fires formed by the combustion of coal gas, natural gas, hydrogen, etc. Category E fire refers to a fire in which an object is charged and burned.

How to use carbon dioxide fire extinguisher: 1. When using carbon dioxide fire extinguisher, you should first mention the fire extinguisher to the location of the jujube stop, put down the fire extinguisher, pull out the safety pin, hold the handle at the root of the horn barrel with one hand, and hold the pressure handle of the opening and closing valve with the other hand. For carbon dioxide fire extinguishers without a jet hose, the horn should be pulled up 70-90 degrees.

2. The cart-type carbon dioxide fire extinguisher is generally operated by two people, and when used, the two people push or pull the fire extinguisher to the burning place together, stop at about 10 meters away from the combustible, one person quickly removes the horn barrel and sprays the hose, the stool pin holds the handle at the root of the horn barrel, and the other person quickly rotates the handwheel in the counterclockwise direction, and drives to the largest position. The extinguishing method is the same as that of the portable method.

Precautions for carbon dioxide fire extinguishers: When using carbon dioxide fire extinguishers, do not directly grasp the outer wall of the horn barrel or the metal connecting pipe with your hands to prevent your hands from being frostbitten. When using carbon dioxide fire extinguishers, if they are used outdoors, they should be sprayed in the upwind direction; If it is used in a narrow indoor space, the operator should leave quickly after extinguishing the fire to prevent suffocation.

Second, the closed stove carbon oxide fire extinguisher is suitable for fighting Class B fires (such as kerosene, diesel, **, methanol, ethanol, asphalt, paraffin and other fires); Suitable for fighting Class C fires (such as gas, natural gas, methane, ethane, propane, hydrogen, etc.); Extinguishing Class E fires (fires in which objects are charged and burned). In addition, it can also be used to extinguish books, archives, valuable equipment, precision instruments, electrical equipment below 600 volts and oil.

Fire extinguishers are distinguished not by the color of the bottle, but by the extinguishing agent they are filled. There are five most common types of fire extinguishers, which are water-based fire extinguishers, foam fire extinguishers, dry powder fire extinguishers, halide fire extinguishers, and carbon dioxide fire extinguishers.

Precautions for the use of carbon dioxide fire extinguishers1. The open-air fire extinguisher is not effective in extinguishing the fire when there is wind.

2. Before spraying, you should first remove the sedan car pretend to be a danger device and then press the pressure handle.

3. Due to the small effective spray distance of the carbon dioxide fire extinguisher, it should not be too far away from the fire source when extinguishing the fire, and it is generally better to be about 2 meters.

4. Do not touch the metal part with your hands when spraying bending to prevent frostbite.

5. After spraying in a small confined space or underground tunnel, people should withdraw immediately to prevent suffocation.

The above content refers to Encyclopedia - Carbon dioxide fire extinguishers.