In order to effectively prevent fire accidents in public places, we must understand the attempts and methods of extinguishing fires. Below, the fire alarm system manufacturer's editor will organize some fire extinguishing methods and common knowledge for you

1、 According to the principle of combustion, the principle of all fire extinguishing methods is to directly spray the extinguishing agent onto the burning object. Alternatively, the fire extinguishing agent can be sprayed on materials near the fire source to prevent the formation of new fire points due to the thermal radiation of the flame.

1. The principle of cooling fire extinguishing method is to directly spray the extinguishing agent onto the burning object, in order to lower the combustion temperature below the ignition point and stop the combustion. Alternatively, the fire extinguishing agent can be sprayed on materials near the fire source to prevent the formation of new fire points due to the thermal radiation of the flame. Cooling fire extinguishing method is a major method of extinguishing fires, commonly using water and carbon dioxide as extinguishing agents to cool and extinguish fires. Fire extinguishing agents do not participate in chemical reactions during the combustion process during the fire extinguishing process. This method belongs to the physical fire extinguishing method.

2. Isolation and fire extinguishing method

Isolation and fire extinguishing method is to isolate or remove burning materials from surrounding unburned combustible materials, interrupt the supply of combustible materials, and stop combustion due to the lack of combustible materials. The specific methods include:

(1) Remove combustible, flammable, explosive, and combustible materials near the fire source;

(2) Close the valves of combustible gas and liquid pipelines to reduce and prevent the entry of combustible substances into the combustion zone;

(3) Try to block the spread of flammable and combustible liquids;

(4) Dismantle flammable buildings adjacent to the fire source to form a space zone to prevent the spread of the fire.

3. Suffocation fire extinguishing method

The suffocation fire extinguishing method is a fire extinguishing method that prevents air from flowing into the combustion area or dilutes the air with non combustible materials, so that the combustion material does not receive enough oxygen and is extinguished. The specific method is:

(1) Cover combustible materials with non combustible or non combustible materials such as sand, cement, wet burlap bags, and wet cotton quilts;

(2) , spray fog water, dry powder, foam and other extinguishing agents to cover the combustibles;

(3) Containers and equipment that are filled with inert gases such as water vapor or nitrogen, carbon dioxide, etc. in case of fire;

(4) Closed fire buildings, equipment, and holes;

(5) Spray non combustible gases or liquids (such as carbon dioxide, nitrogen, carbon tetrachloride, etc.) into the combustion area or onto the combustion material.

2、 Common knowledge of fire extinguishing

Solid fire shall be put out with water type, foam, ammonium phosphate dry powder and haloalkane type extinguishers first

Liquid fire shall be put out with dry powder, foam, haloalkane and carbon dioxide extinguishers first.

Gas fires should be first extinguished using dry powder, halogenated alkanes, and carbon dioxide fire extinguishers.

Fire caused by charged objects should be first extinguished using halogenated alkanes, carbon dioxide, and dry powder fire extinguishers.

The fire extinguishing equipment for metal fires should be negotiated and resolved by the design department and the local public security fire supervision department. Currently, there is no regular type of fire extinguisher product in China.

3、 The usage and firefighting methods of fire extinguishers can refer to the "Common Knowledge of Fire Extinguishers" for the classification of fire extinguishers

There are many types of fire extinguishers, which can be divided into handheld and wheeled according to their movement methods; According to the power source of driving extinguishing agent, it can be divided into: gas cylinder type, pressure storage type, chemical reaction type, and according to the filled extinguishing agent, it can also be divided into: foam, dry powder, haloalkane, carbon dioxide, acid and alkali, clean water, etc.