What are the steps of using a dry chemical fire extinguisher?

pull out the insurance pin; Lift the fire extinguisher right and press the handle;

Hold the nozzle with the left hand and aim it at the root of the ignition; (About 3 meters away from the fire source; Pay attention to the distance during the drill, don't get too close, safety first).

Note: The use of portable dry powder fire extinguisher, should be carried out at a distance of about 3-5 meters from the combustible, the operator should first shake the fire extinguisher up and down and then remove the safety pin on the opening pressure handle, and then hold the root of the nozzle in front of the jet hose with one hand, and press down the opening handle with the other hand, and quickly aim at the root of the flame to spray dry powder to extinguish the fire. When extinguishing the fire, it is necessary to extinguish the fire quickly and thoroughly, and do not leave residual fire to prevent recurrence.

Outdoors, choose the upwind direction, and do not directly face the oil surface when extinguishing the oil, so as to prevent it from splashing outward and expanding the fire.

Dry powder fire extinguisher is a kind of fire extinguisher, which can be divided into according to the type of dry powder fire extinguishing agent filled:

ordinary dry chemical fire extinguisher;

Ultra-fine dry powder fire extinguisher.

Ordinary dry powder fire extinguishing agent is mainly composed of active fire extinguishing components, hydrophobic components and inert fillers, and the hydrophobic components mainly include silicone oil and hydrophobic silica.

There are many kinds of inert fillers, mainly to prevent vibration and agglomeration, improve the kinematic performance of dry powder, catalyze the polymerization of dry powder silicone oil, and improve the fire extinguishing agent with foam.

and other effects. This kind of ordinary dry powder fire extinguishing agent has been widely used at home and abroad.

The dry chemical fire extinguisher is filled with ammonium phosphate dry powder fire extinguishing agent. Dry powder fire extinguishing agent is a dry and easy-to-flow fine powder used to extinguish fires, made of inorganic salts with fire extinguishing efficacy.

It is composed of a small amount of additives that are dried, crushed and mixed into fine solid powder. It is a fire extinguishing agent that is widely used in fire fighting and is mainly used in fire extinguishers. In addition to the special dry powder chemical fire extinguishing agent for fighting metal fires, dry powder fire extinguishing agent is generally divided into BC dry powder fire extinguishing agent (sodium bicarbonate.

and ABC dry powder (ammonium phosphate).

One is the volatility of inorganic salts in dry powder.

decomposition products, and free radicals produced by the fuel during combustion.

or the active group undergoes chemical inhibition and negative catalysis, so that the chain reaction of combustion is interrupted and the fire is extinguished; Second, the powder of dry powder falls outside the surface of the combustible, and a chemical reaction occurs.

And under the action of high temperature, a glass-like covering layer is formed, so as to isolate oxygen, and then suffocate and extinguish the fire. In addition, there is a partial dilution of oxygen and cooling.

How to use the fire extinguisher and precautions How to use the fire extinguisher and precautions.

There are many types of fire extinguishers, suitable for extinguishing different types of disasters, and the use methods are not the same

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 to extinguish the fire.

Note: Do 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.

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

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: When extinguishing the fire, personnel should stand upwind.

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

After indoor use, ventilation should be strengthened.

3) Portable dry chemical fire extinguisher.

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

When using, first 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.

Maybe many people have seen how others use fire extinguishers in their lives, but I have never used them, in case of a fire, you may pick up a fire extinguisher but you can't start, in fact, if you can understand the correct way to use the fire extinguisher, it will play a great role in the critical time. So what are the steps for using dry chemical fire extinguishers?

1. In the first step, the fire extinguisher should be raised to a more appropriate distance from the fire source, generally speaking, about 5 meters, and it cannot be in its downwind position, but in its upwind position or close to the fire source.

2. Step 2, turn the dry powder fire extinguisher upside down several times, do not use dry powder for a long time, the dry powder in the fire extinguisher may accumulate together, and you need to shake it to make the dry powder loose pants inside throb.

3. In the third step, use the nozzle, and then aim at the place where the fire is most violent, and pull out the safety pin.

4. Step 4, hold its nozzle and aim at the position of the fire source.

5. Step 5, press the handle, and the fire extinguisher will be sprayed out directly for extinguishing the fire.

6. Step 6: After the fire is all extinguished, it should be cooled with water, and all the smoke should be extinguished to prevent recurrence.