Precisely what is Aerosol fire extinguishing

What on earth is aerosol fire extinguisher? Aerosol fire extinguishing technological innovation is a whole new kind of hearth extinguishing know-how made on The premise of military services pyrotechnics.

The primary generation of aerosol fire extinguishing technological innovation was born within our country, also known as smoke fireplace extinguishing technological innovation, which began from the early nineteen sixties. It absolutely was completed by scientific researchers through the Tianjin Hearth Exploration Institute of General public Stability, who independently made an automatic smoke fireplace extinguishing program, which is mainly accustomed to extinguish fires in school A, B, and C liquid storage tanks.

Inside the early 1980s, While using the emergence of environmental defense issues of “halon fireplace extinguishing agent”, discovering alternatives to halon turned an essential investigate matter.

At the conclusion of the eighties, Russian scientists initial succeeded in exploring aerosol hearth extinguishing know-how that can extinguish fires in a submerged fashion, which opened up a new way for halon substitution exploration. Subsequently, aerosol hearth extinguishing technologies has captivated the eye of your Global community, and countries like China, The us, Australia, Malaysia together with other nations have also begun research on new aerosol hearth extinguishing systems.

Most of the time, aerosol is often a stable point out process fashioned because of the dispersion of good solid or liquid particles inside of a fuel. Skillfully, it refers to your colloidal process that utilizes gas (ordinarily air) as being the dispersion medium and sound or liquid particles given that the dispersant.Common aerosols in mother nature—clouds, smoke, fog, and so forth.The size on the particles in aerosols is mostly inside the buy of 10-five to 10-1μm, which has gasoline fluidity and can diffuse about obstacles.

The medicament while in the aerosol fire suppression program device is good, and the part emitted by the medicament throughout the oxidation-reduction reaction is aerosol. The first technology of aerosol hearth extinguishing engineering-smoke fireplace extinguishing engineering.

K-style aerosol hearth extinguisher, also called potassium salt hearth extinguishing technologies, is the 2nd stage of the development of aerosol fire extinguishing technological innovation, which began in the former Soviet Union in the mid-1960s. Our region began late On this regard, setting up during the early nineteen nineties.

In this type of aerosol creating agent, potassium nitrate is especially utilized as the key oxidant. Its sprays have superior hearth extinguishing performance, but mainly because they contain a large amount of potassium ions, Simple to absorb humidity, forming a yellow and sticky solid alkaline conductive liquid film, this substance is very detrimental to Digital machines, so K-style aerosol automated fire extinguishing machine can’t be Utilized in electronic tools, precision instruments and cultural relics Archive spot. At the moment, the use available in the market is progressively decreasing.

The third-technology aerosol (S kind) is especially fabricated from strontium salt as the key oxidant. Compared with the 2nd-era potassium salt (K-type) aerosol, strontium ions never take in moisture, usually do not form a conductive Alternative, and will not result in harm to electrical tools. In 2001, China Mobile Communications Company picked the strontium salt aerosol (S-variety aerosol computerized hearth extinguishing unit) produced by the business soon after stringent inspection and verification to protect its interaction foundation stations and various areas Geared up with subtle electronic tools.

At this time, strontium salt aerosol goods happen to be applied in Many engineering assignments, as well as the third-era aerosol is now An increasing number of recognized by people

Aerosol fire extinguisher software array

a. Electrical fire

Conversation area, communication foundation station, Digital computer room, etc.;

Electrical fires in spots that contains precision instruments and gear, such as energy distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and so on.

b. Solid floor hearth

Surface area fire of combustible strong supplies in spots where by combustible good resources are utilized or saved.

c. Liquid hearth

Liquid fires in destinations exactly where diesel oil is generated, made use of or stored (except -35 diesel), heavy oil, transformer oil, animal and vegetable oil as well as other flammable liquids of Class C; Just before extinguishing a gas hearth, the gasoline source can be Minimize off.

Aerosol hearth suppression process application .

d. The S-type aerosol fireplace extinguishing product cannot be accustomed to place out the subsequent fires

①Substances which can be oxidized with no air, for instance nitrocellulose, gunpowder, and many others.; Lively metals, for instance potassium, sodium, magnesium, titanium, etc.; compounds that could decompose by them selves, for instance particular peroxides, hydrazine, etcetera. Metal hydrides, including potassium fluoride, sodium hydride, and so forth. All-natural substances, like phosphorus. Robust oxidants, which include nitrogen oxide, fluorine, etc.

② Deep fireplace of combustible good resources.

③ Hearth in crowded spots, for example theaters, auditoriums, and many others.

④ Fire in areas with explosion hazard, for instance workshops with explosive dust.

⑤ Ultra-thoroughly clean ecosystem, including pharmaceutical workshops, chip processing locations, health care rooms, etc.

Aerosol fireplace extinguishing Functioning principle

The four components of combustion: combustibles, oxidizer, temperature and uninhibited chain reaction. The fireplace extinguishing mechanism of fire extinguishing fuel will be to do away with just one or a number of of the 4 things of combustion.

The sound fireplace extinguishing agent during the S-kind aerosol fire extinguishing unit is started by energy, and it undergoes redox reaction to variety a large number of agglomerated fire extinguishing aerosols, and its composition is mainly N2, a small level of CO2, and steel salt stable particles.

Aerosol hearth extinguishing mechanism is as follows

System of endothermic cooling and fire extinguishing

Metallic salt particles absorb a large amount of heat at superior temperatures, and endure Actual physical endothermic procedures for example thermal melting and gasification. The flame temperature is reduced and after that radiated to your combustible combustion surface for gasification of combustible molecules and vaporized combustible molecules. The heat of pyrolysis of combustion molecules into cost-free radicals will reduce, and also the combustion reaction pace will be suppressed to a specific extent.

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