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Popular science 4 common fire extinguishers, let you understand their adaptation to the type of fire
Release time:
2023-05-12 17:21
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When a fire occurs, you will want to use the fire extinguisher to slow down the fire at the first time. Only according to the type of fire, you should choose the appropriate fire extinguisher to achieve the best fire extinguishing effect. Otherwise, the fire extinguishing will fail, but will endanger personal safety and property damage.
The first thing you need to know is the three main types of fire in your home
According to fire statistics, the occurrence of residential fire is the most frequent, among which the kitchen, bedroom and living room have a higher frequency, and the fire is not only a fire, but also can be divided into the following three types according to the cause of the fire:
Class A fire
Common fire caused by wood products, paper, fiber products, quilts and plastics burning.
Class B fire
Ignition type fires divided into gasoline, lamp oil, alcohol and gas; And because of cooking oil, animal and plant oil caused by oil fire.
Class C fire
Electrical fire caused by the burning of electrical equipment in electricity, such as wires, motors, engines, transformers, etc.
Common types of fire extinguishers:
Dry powder fire extinguisher
The main ingredient of dry powder is ammonia dihydrogen phosphate, which can isolate fire source and oxygen to achieve the effect of fire extinguishing. The price is simple and can put out class A, B and C fires at the same time. It is the type of fire extinguisher used by the most people.
Applicable fire type: A, B, C
Note:
Dry powder is easy to fly, inhalation affects the respiratory tract.
Dry powder has strong viscosity and is difficult to clean up after use.
Dry powder formulations need to be replaced every 3 years.
Foam fire extinguisher
There are two types of foam extinguishers, chemical foam extinguishers and mechanical foam extinguishers. Chemical foams are foamed by mixing sodium bicarbonate and aluminum sulfate to cause chemical reactions, while mechanical foams are formed by surfactant or water film, mixed with aqueous solution and then produced by mechanical principle.
Applicable fire type: A and B
Note:
Foam fire extinguisher is large and heavy, so it is inconvenient to use.
Chemical foam should be turned upside down before use to allow the chemical liquid to react, and is not suitable for alcohol fire.
Both are not suitable for electrical fires and may pose a risk of electric shock.
Carbon dioxide fire extinguisher
The use of carbon dioxide to achieve cooling and fire blocking effect, because there is no pressure gauge, can be used within the effective period, gas agent will not have powder, affect the line of sight or cause property damage, is the best clean up, the least pollution of the fire extinguisher.
Applicable fire type: B, C(If it is a cooking oil fire, the burning speed is fast, it is recommended to use dry powder or enhanced liquid fire extinguisher)
Note:
Do not use in confined Spaces to avoid hypoxic fainting.
Slightly less effective than a dry powder extinguisher.
Reinforced liquid fire extinguisher
The enhanced liquid is made of water and potassium carbonate, the liquid is non-toxic, tasteless and colorless, will not stimulate the respiratory tract when used, friendly environment and human body, the composition is mostly water, so after use as long as wipe with a rag can, will not cause property damage.
Applicable fire type: A, B, C
Note:
The service life is as long as 5-10 years.
The price is higher than other fire extinguishers.
Popular science 4 common fire extinguishers, let you understand their adaptation to the type of fire
2023-05-12
When a fire occurs, you will want to use the fire extinguisher to slow down the fire at the first time. Only according to the type of fire, you should choose the appropriate fire extinguisher to achieve the best fire extinguishing effect. Otherwise, the fire extinguishing will fail, but will endanger personal safety and property damage.
Forest grassland fire prevention and popular science knowledge
2023-05-12
Forest grassland fire refers to the phenomenon of forest and grassland fire burning which is out of human control and freely spreads and expands in the forest and grassland, and brings certain harm and loss to the forest grassland, ecosystem and human beings. Forest grassland fire is a kind of sudden and destructive natural disaster which is difficult to deal with and rescue. Large area forest fire has been listed by the United Nations as one of the world's eight major natural disasters and one of the public emergencies.
2023-05-08
In May 2015 2015 Moscow Exhibition of labor ISSE On January 2013 15-17, the Middle East (Dubai) International Security Fire Safety Exhibition
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