Foam fire extinguisher 1211 fire extinguisher Dry powder fire extinguisher What kind of fire can car

According to the usual form, fire extinguishing agents can be divided into three categories, namely liquid fire extinguishing agents, gas fire extinguishing agents and solid fire extinguishing agents.

Liquid fire extinguishing agents mainly include: 1. Water and water additives, which are mainly suitable for extinguishing Class A fires. 2. Foam fire extinguishing agent, this kind of fire extinguishing agent is composed of chemicals, hydrolyzed proteins or surfactants.

Composed of aqueous solutions with other additives, in a concentrated form. It is mixed with water by special equipment, diluted and then mixed with air to form countless bubbles, and finally extinguished in the form of foam. Extinguishing oil fires Fire extinguishing agent is a special fire extinguishing agent, which is suitable for extinguishing mouth fires.

Its main component is trimethyl metaborate.

Gas fire extinguishing agents mainly include: 1. Non-flammable gases, mainly carbon dioxide, nitrogen, etc. and other inert gases.

2. Alkyl halide fire extinguishing agent, which is obtained by replacing hydrogen in low-level alkane molecules with halogen atoms such as fluorine, chlorine, and Australia. Gas fire extinguishing agents are stored in gaseous or liquid form, and extinguished in gas form, they can be used for A, C fire and live equipment fire.

The standard state of solid fire extinguishing agent is solid, which is a mixture of some solid powders, and it has three types. 1. Dry powder fire extinguishing agent, which is made of fine and dry inorganic salt.

Composition of powder and additives. 2. Powder fire extinguishing agent, it is a powder foam solid mixture, its powder particles are larger than dry powder fire extinguishing agent powder, mainly used to extinguish metal fires, is a special fire extinguishing agent. 3. Smoke fire extinguishing agent is a special fire extinguishing agent, which is suitable for heavy petroleum product fires.

Foam fire extinguisher.

It is suitable for fighting general Class B fires, such as oil products, grease and other fires, and can also be applied to Class A fires, but cannot extinguish water-soluble flammable and flammable liquids in Class B fires.

fires, such as alcohols, esters, ethers, ketones and other substance fires; It is also not possible to extinguish live equipment and Class C and D fires.

1211 fire extinguisher.

It is mainly suitable for extinguishing flammable and flammable liquids, gases and live equipment; Extinguishing precision instruments, meters, valuable materials, precious cultural relics, books and archives and other initial disasters; Extinguish the surface of solid substances in aircraft, ships, vehicles, oil depots, hotels and other places.

Dry chemical fire extinguishers.

It is suitable for the initial disaster of flammable and combustible liquids, gases and live equipment; In addition to the above-mentioned types of fires, portable dry powder fire extinguishers can also be used to extinguish the initial disaster of solid substances. But none of them can extinguish metal burning fires.

CO2 fire extinguisher.

It is mainly used to extinguish the initial disaster of valuable equipment, archives, instrumentation, electrical equipment below 600 volts and oil.

According to the type of fire extinguishing agent: dry powder fire extinguisher 1211 fire extinguisher carbon dioxide fire extinguisher foam fire extinguisher Second, the fire extinguisher cannot be reversed when used, nor can it lie horizontally, otherwise the fire extinguishing agent will not be sprayed. 3.Carbon dioxide extinguishing fires.

Type of fire:

Category A fires are fires of solid combustible materials, including wood, cloth, paper, rubber and plastic.

Class B fires are flammable and flammable liquids, flammable gases and grease fires.

Class C fires are fires of live electrical equipment.

Class D fires are fires from some combustible metals, such as magnesium, sodium, potassium and their alloys.

Generally, fire extinguishers are marked with signs indicating the type of fire extinguished and the level of fire extinguishing. For example, A, B, etc., the user can immediately identify which type of fire the fire extinguisher is suitable for extinguishing at a glance.

Foam fire extinguisher, dry powder fire extinguisher, carbon dioxide fire extinguisher, alkane halide (1211) fire extinguisher.

Foam fire extinguisher: generally can extinguish class A and B fires, when the electrical fire occurs, the power supply is cut off, foam fire extinguishers can also be used to extinguish.

Dry chemical fire extinguisher: Dry chemical fire extinguisher is suitable for extinguishing Class B and C fires.

Carbon dioxide fire extinguisher: suitable for extinguishing Class B and C fires.

Alkyl halide (1211) fire extinguishers are mainly used to extinguish fires in flammable liquids, live electrical equipment and precision instruments, and computer rooms. The fire extinguishing agent contained in this fire extinguisher is not corrosive, does not leave traces after extinguishing the fire, and the effect is also better.

Generally, the spray fire extinguishing time of the portable fire extinguisher contained in the agent is within one minute, and the actual effective fire extinguishing time is only 10 to 20 seconds, so it is necessary to correctly grasp the use method according to the instructions for use at ordinary times, otherwise it cannot be used when it is **, and the fire extinguishing time is delayed.

Foam fire extinguishers should not be used because foam fire extinguishers contain moisture, which conducts electricity, thus forming risk factors.

The principle of foam fire extinguisher fire extinguishing is that when extinguishing the fire, a large amount of carbon dioxide and foam can be sprayed, which can adhere to the combustibles, so that the combustibles are isolated from the air to achieve the purpose of extinguishing the fire. Ordinary foam fire extinguishers should not be used to extinguish fires with live equipment, otherwise they will threaten personal safety. However, if an atomizing nozzle or an intermittent nozzle is used, the air between the water mist can be insulated, and the live fire below 1000V can be extinguished.

Precautions for the use of fire extinguishers

If the dry chemical fire extinguisher used is a built-in gas cylinder or a pressure storage type, the operator should first remove the safety pin on the opening handle, then hold the nozzle at the front end of the spray hose, and press down the opening pressure handle with the other hand to open the fire extinguisher to extinguish the fire. When using a fire extinguisher or a pressure storage fire extinguisher with a jet hose, one hand should always press down the pressure handle and not let go, otherwise the spray will be interrupted.

Foam fire extinguisher 1, portable use method: you can carry the ring on the upper part of the cylinder to quickly rush to the fire. At this time, care should be taken not to tilt the fire extinguisher too much, let alone hold it horizontally or upside down, so as not to mix the two agents and spray out in advance.

When about 10 meters away from the ignition point, the cylinder can be turned upside down, one hand holds the lifting ring, and the other hand holds the bottom ring of the cylinder, and the jet is aimed at the combustible.

Foam fire extinguishers cannot be used.

Dry chemical fire extinguishers, carbon dioxide fire extinguishers, and foam fire extinguishers are suitable for the following types of fires:

1. Dry powder fire extinguisher:

Dry powder fire extinguishers can extinguish general fires, and can also extinguish fires caused by the combustion of oil, gas, etc. Dry powder fire extinguisher uses carbon dioxide gas or nitrogen gas as the power to spray out the dry powder in the cylinder to extinguish the fire.

Dry powder is a dry, easy-to-flow fine solid powder, composed of a base material that can extinguish fires and additives such as moisture-proof agents, flow accelerators, and anti-caking agents. It is mainly used to extinguish the initial fire of flammable liquids such as petroleum and organic solvents, combustible gases and electrical equipment.

2. Carbon dioxide fire extinguisher:

It is used to extinguish the initial disaster of books, archives, valuable equipment, precision instruments, electrical equipment below 600 volts, and oil. It is suitable for fighting Class B fires, such as kerosene, diesel, proto-sensitive oil, methanol, ethanol, asphalt, paraffin, etc. 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).

3. Foam fire extinguisher:

It can be used to extinguish Class A fires, such as fires caused by the burning of solid substances such as wood and cotton; It is most suitable for fighting Class B fires, such as gasoline, diesel and other liquid fires; It cannot extinguish fires of water-soluble flammable and flammable liquids (such as alcohols, esters, ethers, ketones and other substances) and Class E (electrified) fires.

The use of dry chemical fire extinguishers.

Fighting: general solid fire (a), combustible liquid (b), combustible gas (c) and live equipment.

The use of carbon dioxide fire extinguishers.

Flammable and combustible liquids, combustible gases and low-voltage electrical equipment, instruments and meters, books and archives, handicrafts, displays, etc.

Uses of foam fire extinguishers:

Generally auspicious solid, and flammable liquid fires.

Scope of application of dry powder fire extinguisher: suitable for flammable, combustible liquid, gas and live equipment for initial disasters; In addition to being used for the above-mentioned types of stove liquid fires, ammonium phosphate dry powder fire extinguishers can also extinguish the initial disaster of solid substances. But none of them can extinguish metal burning fires.

Scope of use of foam fire extinguisher: It is suitable for fighting general Class B fires, such as oil products, grease and other fires, and can also be applied to Class A fires, but cannot extinguish fires of water-soluble flammable and flammable liquids in Class B fires, such as alcohol, esters, ethers, ketones and other substance fires; It is also not possible to extinguish live equipment and Class C and D fires.

Fire classification attached:

Class A fire: refers to a fire of solid matter. This substance is usually organic in nature and can produce scorching embers when burned. Such as wood, hay, coal, cotton, wool, hemp, paper and other fires.

Category B fire: refers to a fire of liquids or meltable solid substances. Spring calls such as kerosene, diesel, **, methanol, ethanol, asphalt, paraffin, plastic and other fires.

Class C fire: refers to a gas fire. Such as gas, natural gas, methane, ethane, propane, hydrogen and other fires.

Category D fire: refers to a metal fire. Such as potassium, sodium, magnesium, aluminum-magnesium alloy and other fires.

Class E fire: refers to a live fire. A fire in which an object burns with electricity.

Category F fire: refers to a fire of cooking objects (such as animal and vegetable fats) in cooking utensils.

The 1211 fire extinguisher is a dry powder fire extinguisher that is incorrect.

The 1211 fire extinguisher is not a dry chemical fire extinguisher. 1211 refers to "BCF-1211" and is a clean gas fire extinguishing agent used in fires. BCF-1211 is an alkyl halide compound, the full name of which is bromomethane hexafluoride, also known as CBRCLF2.

The 1211 fire extinguisher is mainly used for extinguishing Class B (i.e., combustible liquid fire) and Class C (i.e., combustible gas fire) fires. It is non-toxic, non-polluting, and non-conductive, and can effectively extinguish fire sources without causing harm or danger to people.

The dry chemical fire extinguisher is a common multi-purpose fire extinguisher, which is suitable for Class A, B, and C fires. Dry chemical fire extinguishers use dry chemical powders, such as ABC dry powder, to suppress flame spread, reduce ignition temperature, and isolate oxygen to extinguish fires. Therefore, 1211 fire extinguishers and dry chemical fire extinguishers are different types of fire extinguishers that differ in fire extinguishing applications and usage scenarios.

How does a fire extinguisher work? Why was the fire extinguished?

A fire extinguisher is a common fire extinguishing tool that is effective in extinguishing various types of fires. How it works is mainly based on the following aspects:

1. Fire extinguishing agent

Fire extinguishers contain specific types of extinguishing agents, such as dry powder, carbon dioxide (CO2), foam, etc. These extinguishing agents have different chemical properties and are able to interact with the combustion process in the flame, thus achieving the effect of sun-lee infiltration into the extinguishing of the fire.

2. Asphyxiation

A common working principle is to suffocate the flame by consuming the oxygen around the flame. For example, a CO2 fire extinguisher releases a large amount of CO2 gas, which can quickly diffuse and squeeze oxygen out when it comes into contact with the flame, reducing the oxygen concentration around the flame, so that the flame loses the conditions for combustion.

3. Cooling effect

Another working principle is to achieve cooling by absorbing the heat of the flame and reducing the temperature of the flame below the ignition point. For example, water and foam fire extinguishers are able to spray water or foam onto the fire scene, absorb the heat energy generated by combustion, and reduce the temperature of the flame, thereby suppressing or extinguishing the fire.