The application of various fire extinguishers, five common fire extinguishers

To put it simply, Class A, B, C, D, and E fires refer to solid, liquid, gaseous, metal, and live fires, respectively.

Water-type, foam, ammonium phosphate dry powder, and halide type fire extinguishers should be used to extinguish Class A fires;

Dry powder, foam, halide alkanes, and carbon dioxide fire extinguishers should be used to extinguish Class B fires, and chemical foam fire extinguishers should not be used to extinguish Class B fires with polar solvents;

Dry powder, halide alkyl and carbon dioxide fire extinguishers should be used to extinguish Class C fires;

The fire extinguishing equipment for fighting Class D fires shall be resolved through consultation between the design unit and the local public security and fire supervision department.

Dry powder, halide alkyl and carbon dioxide fire extinguishers should be used to extinguish Class E live fires;

Ammonium phosphate dry powder and halide type fire extinguishers should be used to extinguish Class A, B, C fires and live fires;

The five common fire extinguishers are: carbon dioxide fire extinguishers, foam fire extinguishers, water-based fire extinguishers, water-type fire extinguishers, and dry powder fire extinguishersDifferent fire extinguishers have different effects.

1. Carbon dioxide fire extinguisher: liquid carbon dioxide is used as a fire extinguishing device, which needs to be pressurized first and then sprayed out when used, so that the fire can be isolated from the air, so as to achieve the purpose of fire extinguishing, and can be used for archives and initial disasters of electrical equipment below 600 volts.

2. Foam fire extinguisher: sodium bicarbonate and aluminum sulfate are used as refrigerants, and the fire extinguisher needs to be turned upside down when used, so that the two substances are fully mixed to produce foam, and finally sprayed out, which has a wide range of use, but cannot be used to extinguish live equipment.

3. Water-based fire extinguisher: The internal fire extinguishing agent is to stir the surfactant and pure water, and the tank is in a liquid form, but it will become a water mist after spraying, which can quickly evaporate the heat in the fire field and form a water film to achieve the purpose of extinguishing the fire.

4. Water-type fire extinguisher: The fire extinguisher is filled with water-forming foam fire extinguishing agent and nitrogen, which can play a double fire extinguishing effect, and has a long validity period, which can be used to extinguish both solid and liquid initial disasters.

5. Dry powder fire extinguisher: one is an ordinary dry powder fire extinguisher, with a large particle surface area and limited fire extinguishing ability, and the other is an ultra-fine dry powder fire extinguisher, with a small internal particle surface area, so the fire extinguishing efficiency is higher.

Choice of fire extinguisher

1. Fire extinguishers such as water-type, foam, dry powder, and halide should be used to extinguish Class A fires.

2. Dry powder, foam, halide alkanes, carbon dioxide, etc. should be used to extinguish Class B fires, and chemical foam fire extinguishers should not be used to fight water-soluble Class B fires.

3. Dry powder, halide alkane and carbon dioxide fire extinguishers should be used to extinguish Class C fires.

4. Extinguishing live equipment fires should use alkyl halides, carbon dioxide, and dry powder fire extinguishers.

5. Dry powder and halide fire extinguishers should be used to extinguish fires of A, B, C, and live equipment.

6. Special dry powder fire extinguishers should be used to extinguish Class D fires.

The five common types of fire extinguishers are as follows:

1. Carbon dioxide fire extinguisher.

Liquid carbon dioxide is used as a fire extinguishing device, which needs to be pressurized first and then sprayed out, so that the fire can isolate the air, so as to achieve the purpose of extinguishing the fire, and can be used for archival materials, initial fires of electrical equipment below 600 volts, etc.

2. Foam fire extinguisher.

Sodium bicarbonate and aluminum sulfate are used as refrigerants, and the fire extinguisher needs to be turned upside down when used, so that the two substances are fully mixed to produce foam, and finally sprayed out, which has a wide range of use, but cannot be used to extinguish live equipment.

3. Water-based fire extinguisher.

The internal fire extinguishing agent is to stir the surfactant and pure water, and the tank is in a liquid form, but after spraying, it will become a water mist, which can quickly evaporate the heat in the fire field and form a water film to achieve the purpose of extinguishing the fire.

Types of fire extinguishers.

There are many types of fire extinguishers (three categories): according to their way of moving, they can be divided into: portable and trolley.

Foam, dry powder, alkyl halide, carbon dioxide, acid and alkali, water, etc.

A fire extinguisher, also known as a fire extinguisher, is a portable fire extinguishing tool. Chemicals are hidden in fire extinguishers to extinguish fires. Fire extinguishers are one of the common fire prevention devices and are stored in public places or places where fires may occur.

Different types of fire extinguishers contain different ingredients and are designed for different fire alarms. Care must be taken when using it to avoid counter-effects and dangers.

The following are the commonly used types of fire extinguishers:1Dry chemical fire extinguisher:

It is suitable for solid, liquid, gas and electrical equipment fires, can quickly and effectively suppress fires, and is the most versatile fire extinguisher. 2.CO2 fire extinguisher:

It is suitable for electrical fires and flammable liquid fires, and it is necessary to keep a safe distance when using it to avoid the harm of carbon dioxide to the human body. 3.Foam fire extinguisher:

It is suitable for liquid and solid fires, which can quickly cover the fire source and effectively suppress the fire, but it cannot be used for oil fires. 4.Compressed air foam fire extinguisher:

It is suitable for flammable liquids, flammable solids and electrical fires, and should be used to keep a safe distance and avoid inhaling foam and air. 5.Chlorinated alloy fire extinguisher:

It is suitable for lithium battery fire and metal fire, and can quickly suppress fire, but cannot be used for liquid and electrical fire.

1. Portable foam fire extinguisher.

Foam fire extinguishers are suitable for extinguishing the initial disaster of oil and general substances.

When using, hold the lifting ring of the fire extinguisher with your hand, and lift it to the fire scene smoothly and quickly, do not carry it horizontally or horizontally. When extinguishing the fire, hold the ring with one hand and the bottom edge of the barrel with the other hand, turn the fire extinguisher upside down, aim the nozzle at the fire source, and shake it vigorously a few times, that is, it can extinguish the fire.

Note:1Do not put the cover and bottom of the fire extinguisher against the human body to prevent the cover and bottom from popping out and hurting people.

2.Do not spray together with water at the same time to avoid affecting the extinguishing effect.

3.When extinguishing electrical fires, try to cut off the power supply first to prevent personnel from being electrocuted.

2. Portable carbon dioxide fire extinguisher.

Carbon dioxide fire extinguishers are suitable for extinguishing the initial disaster of precision instruments, electronic equipment and electrical appliances below 600 volts.

Portable CO2 fire extinguishers can be used in two ways, namely handwheels and duckbills.

Handwheel: Hold the handle of the spray canister with one hand, tear off the lead seal with the other hand, rotate the handwheel in an anticlockwise direction, turn on the switch, and carbon dioxide gas will be ejected.

Duckbill type: Hold the handle of the spray canister with one hand, pull out the safety pin with the other hand, and press down the duckbill on the handle to extinguish the fire.

Note:1When extinguishing a fire, personnel should stand upwind.

2.The hand holding the spray canister should be held at the gum nozzle to prevent frostbite.

3.After indoor use, ventilation should be strengthened.

3. Portable dry powder fire extinguisher.

Dry powder fire extinguishers are suitable for extinguishing initial disasters such as oil, clear traces of combustible gas, and electrical equipment.

When using, first call Huaizheng to open the safety pin, hold the nozzle with one hand, aim at the fire source, and pull the pull ring with the other hand to extinguish the fire source.

4. Portable 1211 fire extinguisher.

The 1211 fire extinguisher is suitable for extinguishing the initial disaster of valuables such as oil, instruments and cultural relics files.

When using, first tear off the aluminum seal, pull out the safety safety pin, hold the bottom of the fire extinguisher with one hand, hold the pressure handle switch with the other hand, aim the nozzle at the fire source spray, release the pressure handle, and the spray will stop.

5. Small household fire extinguishers.

Household fire extinguishers are suitable for extinguishing initial small fires in kitchens, living rooms, and living rooms, and there are two types: spray type and throwing type.

When in use: Jet type - press the spring button at the top of the fire extinguisher, aim the nozzle at the fire, and spray to extinguish the fire.

Dear, here are five common fire extinguishers and their use scenarios. 1.Dry chemical fire extinguisher:

It is suitable for many types of fires such as electrical appliances, liquids, gases, etc. Dry chemical fire extinguishers can inhibit oxygen and prevent chemical anti-limb destruction, so they are suitable for many types of fires. However, it is necessary to clean up the residual powder in time after using a dry chemical fire extinguisher, otherwise it will adversely affect equipment and personnel.

2.Carbon dioxide fire extinguisher: suitable for liquid, gas, electrical appliances and other types of fire.

Carbon dioxide fire extinguishers can quickly extinguish fires, but you need to pay attention to the safety of personnel when using them, because carbon dioxide can reduce the oxygen content of the surrounding air, which can be harmful to personnel. 3.Foam fire extinguisher:

Suitable for liquid type fires. Foam fire extinguishers extinguish flames on liquid surfaces, creating a protective layer to prevent the fire from spreading. After using the fingers, it is necessary to clean up the residual foam in time.

4.Water fire extinguisher: suitable for ordinary solid material type fires, such as wood, paper, etc.

Water fire extinguishers can quickly extinguish fires, but when using them, you need to pay attention to whether the fire source is connected to the power supply to avoid electric shock accidents. 5.Freon fire extinguisher:

Suitable for electrical fires. Freon fire extinguishers can extinguish electrical fires without causing damage to the equipment. However, Freon is a toxic and harmful gas, and it is necessary to pay attention to the safety of personnel when using it.