What types of fires can be extinguished by water, and what are the fires that can be extinguished wi

In the consciousness of ordinary people, as long as it is a fire, it should be extinguished with water. This kind of thinking is wrong and even dangerous. Chongqing Changshou Fire reminds which of the following fires cannot be extinguished with water.

1. Electrical appliances, fire appliances.

In the event of a fire, the first thing to do is to cut off the power supply, and if the power cannot be cut off, it must not be extinguished with water or foam, because both water and foam can conduct electricity. Use carbon dioxide, dry chemical fire extinguishers.

or dry sand and soil for extinguishing, and keep a distance of more than 2 meters from electrical equipment and electrical wiring.

2. Oil pan fire.

When the oil pot is **, never pour it with water. Because the water meets the hot oil, it will form a "fryer", which will make the oil fire splash everywhere. The way to extinguish the fire is to quickly pour the cut cold vegetables into the pot along the edges, and the fire will be extinguished automatically.

Another method is to cover the oil pan with a pot lid or a large wet cloth that can cover the oil pan, so that the burning oil fire can not contact the air and suffocate due to lack of oxygen.

3. Gasoline fires.

In case of gasoline fire, fire extinguishing tools such as foam, carbon dioxide and dry powder fire extinguishers should be used immediately to extinguish the fire, and it is strictly forbidden to extinguish it with water.

4. Paint fire.

Paint should never be poured with water. Foam, dry powder or 1211 fire extinguishing appliances or sand should be used for extinguishing.

5. Chemical dangerous goods fire.

Chemical dangerous substances are often stored in school laboratories with a certain amount of sulfuric acid and nitric acid.

Hydrochloric acid, alkali metals.

Potassium, sodium, lithium and flammable metal aluminum powder, magnesium powder, etc. These items are very easy to react or burn when exposed to water, and must not be extinguished with water.

6. Alkali metal fire.

Alkali metals (e.g., potassium, sodium, zinc powders.)

Fire: Because water encounters alkali metals, a violent chemical reaction occurs.

A large amount of hydrogen is generated, which releases a large amount of heat, which is easy to cause**. For this kind of fire, it is necessary to correctly select the fire extinguishing agent and make rational use of local resources.

7. Metal carbide and hydrogen fires.

Such as carbide (calcium carbide.

When exposed to water, it decomposes and releases a large amount of heat, which is easy to expand or occur.

8. Sulfuric acid, nitric acid, hydrochloric acid fire.

This kind of fire should not be extinguished by a strong flow of water, because the acid is impacted by water, causing splashing, flowing out and injuring people, and the acid flowing out is in contact with combustible substances, which has the risk of combustion. Flammable liquids that are lighter than water or do not tolerate water.

Fire: In principle, this type of fire cannot be extinguished with water, but heavy oil can be extinguished with spray water.

9. Molten iron and molten steel fire.

Because the hot object comes into contact with water, there is a danger of causing **. Because the water encounters a high temperature of 1,000 degrees, it quickly vaporizes, and the volume suddenly expands to more than 5,000 times, causing physical **. At the same time water vapor.

At more than 1000 degrees, it can be decomposed into hydrogen and oxygen, causing chemical properties**.

10. High-voltage electrical device fire.

In the absence of good grounding equipment or without cutting off the power supply, it is generally not possible to extinguish with water. First, water is conductive, which is easy to cause short circuit and burn of electrical equipment; Second, it is easy to cause high-voltage current to be transmitted to the fire-fighting equipment along the water column to make the firefighters.

Caused by contact with electricity**.

Water can extinguish five types of fires, the first is liquid fires, such as gasoline, diesel, etc.;

The second is gas fires, such as liquefied gas;

the third is metal fires, such as potassium and sodium;

Fourth, some chemical fires, such as phosphorus, are burned when exposed to water;

The fifth is a live fire, such as a live wire on fire, mainly for fear of electric shock.

In a fire where the density is less than that of water or a flammable liquid that is insoluble in water, it cannot be extinguished with water. For example, when gasoline, kerosene, diesel, benzene, alcohols, ethers, esters, etc. are burned, water cannot be used to extinguish the fire, otherwise a large amount of flammable liquid will flow with the water, which is easy to cause the spread of fire.

Fires that can be extinguished with water are quilts**.

Solid matter fires, which are usually organic in nature and produce scorching embers when burned. Such as wood, hay, coal, cotton, wool, hemp, paper, plastic (there are ashes after burning) and other fires. Such fires can be extinguished with water.

A fire in which a flammable liquid is less dense than water and is insoluble in water. For example, when gasoline and kerosene catch fire, if it is extinguished with water, a large amount of burning oil will float in sleep and flow with the water, which will easily cause the fire to spread.

In a fire, trapped people should have a good psychological quality, stay calm, do not panic, do not act blindly, and choose the correct escape method. It is important to note that the temperature at the scene of the fire is staggering, and the smoke can block your view.

When we see the fire scene in movies and TV, everything is very clear, it is filmed outside of the smoke on the fire field When you are at the scene of a fire, the visibility is very low, and even in the room where you have lived for a long time, you can't figure out the location of the windows and doors, in this case, you need to stay calm and not panic.

If you are trapped in a fire, you should use all the available conditions around you to escape, you can use the fire elevator, indoor stairs to escape, ordinary elevators must not be taken, because ordinary elevators are very easy to lose power, there is no smoke effect, the possibility of being stuck in the air when the fire occurs is very high At the same time, you can also use the water pipes on the outer wall of the building to escape.

There are six types of fires that cannot be extinguished with water1, live fires2, grease and alcohol fires. 3. Gas combustion fire 4, metal fire 5, combustible dust, such as flour, aluminum powder, sugar powder, coal powder and other fires 6, storage of a large amount of sulfuric acidConcentrated nitric acid, hydrochloric acid and other items of the place fire.

1. Electrified fires cannot be directly extinguished with water. Because it may cause electric shock or great damage to electrical equipment, dry powder fire extinguishers such as ammonium phosphate and carbon dioxide fire extinguishers should be used.

Fire suppression. 2. Oil and alcohol fires. Because oil and alcohol are lighter than water, the former will float on the surface of the water when splashed with water, increasing the burning area and thus increasing losses.

To extinguish grease and alcohol fires, the air isolation method should be used to quickly cover the burning object with an object to achieve the effect of isolating the air to extinguish the fire. 3. Dry powder and carbon dioxide fire extinguishers should generally be used for fire fighting with gas combustion. 4. Metal fires are generally extinguished by dry sand or soil covering.

5. Combustible dust, such as flour, aluminum powder, powdered sugar, pulverized coal and other fires, cannot be extinguished with water to prevent the formation of high-quality mixtures. 6. When a fire occurs in a place where a large amount of sulfuric acid, concentrated nitric acid, hydrochloric acid and other items are stored, it cannot be extinguished with water to prevent more violent combustion caused by exothermy.

After a fire, many people's first reaction is to extinguish the fire with water, but in fact, this idea is wrong. In the face of sudden fire, the type of fire should be analyzed calmly and symptomatically extinguished.

The principle of fire extinguishing: remove combustibles or isolate combustibles from other items Isolate oxygen or air Lower the temperature below the ignition point of combustibles; Oil cannot be extinguished with water, because the density of oil is smaller than that of water, and the burning oil will float on the surface of the water and cannot be isolated from the air Charged fires cannot be extinguished directly with water.

In the event of an electrical fire, the first thing to do is to cut off the power supply. If the power cannot be cut off, it is important not to extinguish it with water or foam fire extinguishers, because both water and foam can conduct electricity.

Correct approach: Use carbon dioxide, dry chemical fire extinguishers or dry sand to extinguish, and keep a certain safety distance from live equipment.

Oils and fats**.

Because oil is lighter than water, extinguishing a fire with water, the former will float on the water surface and continue to burn, and at the same time, the oil will increase the burning area with the flow of water, and the water will also form a "fryer" phenomenon when it encounters hot oil, making the oil fire splash everywhere.

Correct approach: To extinguish grease fires, you can use the air isolation method to quickly cover the burning object with an object to achieve the effect of isolating the air to extinguish the fire, or use a foam fire extinguisher, carbon dioxide fire extinguisher and dry powder fire extinguisher to extinguish the fire.

Gas burning fires.

Dry powder and carbon dioxide fire extinguishers should generally be used for fire fighting of gas combustion, such as liquefied gas tank combustion, which can be washed and cooled with water to prevent gas from being heated.

Metal-based fires.

Metal fires such as titanium, potassium, sodium, magnesium, aluminum-magnesium alloys, alkyl bases, liquid metal and other fires are prohibited from using water, carbon dioxide and foam fire extinguishers.

Correct approach: It can be extinguished with dry sand or soil covering.

Chemical fires that react violently when exposed to water.

For example, when a fire occurs in sulfuric acid, concentrated nitric acid, hydrochloric acid and other items that will react violently when exposed to water, it cannot be extinguished with water to prevent more violent combustion caused by exothermy.

For extinguishing fires.

The importance of water speaks for itself!

But blindly taking water to fight can be counterproductive.

Turns water into an "accelerant" for fires

What kind of fire can water extinguish. Flame. Building. Dry wood forest. But. To gasoline fuel oil is. Individual income tax. Those who can't get tired must have. This uses a fire extinguisher to extinguish the oil in the fire.

Fires that are not caused by electrical appliances or liquids can be extinguished.

The type of curtains in your house that are on fire.