What’s Aerosol fireplace extinguishing

Precisely what is aerosol fire extinguisher? Aerosol hearth extinguishing technological innovation is a whole new style of fire extinguishing engineering created on The idea of military pyrotechnics.

The 1st generation of aerosol fireplace extinguishing know-how was born within our state, also called smoke fire extinguishing technologies, which began while in the early sixties. It absolutely was done by scientific scientists in the Tianjin Hearth Study Institute of General public Protection, who independently formulated an automated smoke fire extinguishing system, which is principally accustomed to extinguish fires in Class A, B, and C liquid storage tanks.

In the early eighties, With all the emergence of environmental safety difficulties of “halon fireplace extinguishing agent”, getting possibilities to halon became an important analysis subject.

At the conclusion of the nineteen eighties, Russian researchers initial succeeded in exploring aerosol hearth extinguishing technological know-how that may extinguish fires inside of a submerged fashion, which opened up a fresh way for halon substitution study. Subsequently, aerosol fire extinguishing technology has captivated the attention on the Worldwide Neighborhood, and countries including China, The us, Australia, Malaysia and various nations around the world have also started research on new aerosol fireplace extinguishing technologies.

In most cases, aerosol can be a steady condition program fashioned because of the dispersion of great good or liquid particles in the gasoline. Skillfully, it refers to your colloidal procedure that employs fuel (generally air) because the dispersion medium and strong or liquid particles as being the dispersant.Widespread aerosols in nature—clouds, smoke, fog, etc.The scale with the particles in aerosols is mostly during the order of 10-5 to 10-oneμm, that has gas fluidity and will diffuse all-around hurdles.

The medicament within the aerosol hearth suppression procedure device is solid, along with the part emitted through the medicament from the oxidation-reduction response is aerosol. The first era of aerosol fireplace extinguishing technology-smoke fireplace extinguishing technology.

K-kind aerosol fireplace extinguisher, also referred to as potassium salt fire extinguishing engineering, is the next stage of the development of aerosol fire extinguishing technological know-how, which started in the previous Soviet Union inside the mid-1960s. Our place begun late In this particular regard, setting up in the early 1990s.

In such a aerosol generating agent, potassium nitrate is mainly applied as the main oxidant. Its sprays have superior hearth extinguishing performance, but since they contain a large amount of potassium ions, Uncomplicated to soak up dampness, forming a yellow and sticky potent alkaline conductive liquid film, this compound is quite damaging to Digital equipment, so K-sort aerosol automatic fire extinguishing device cannot be Utilized in electronic tools, precision instruments and cultural relics Archive location. At the moment, the use available in the market is step by step decreasing.

The 3rd-era aerosol (S style) is principally made of strontium salt as the most crucial oxidant. In contrast to the 2nd-era potassium salt (K-variety) aerosol, strontium ions don’t take in moisture, usually do not form a conductive Answer, and will not bring about harm to electrical products. In 2001, China Mobile Communications Corporation selected the strontium salt aerosol (S-type aerosol automatic fire extinguishing product) produced by the corporation after rigid inspection and verification to safeguard its communication foundation stations and other areas Outfitted with complex Digital products.

At present, strontium salt aerosol solutions have already been applied in A large number of engineering assignments, plus the 3rd-technology aerosol happens to be Progressively more approved by end users

Aerosol hearth extinguisher application selection

a. Electrical fire

Interaction area, interaction foundation station, Digital Laptop area, and so on.;

Electrical fires in locations containing precision devices and gear, which include electricity distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, etc.

b. Strong floor fire

Surface fire of combustible strong materials in areas exactly where combustible good materials are utilised or saved.

c. Liquid fireplace

Liquid fires in destinations wherever diesel oil is made, employed or saved (except -35 diesel), significant oil, transformer oil, animal and vegetable oil and various flammable liquids of Classification C; In advance of extinguishing a fuel fireplace, the gasoline source could be Lower off.

Aerosol fireplace suppression procedure software .

d. The S-form aerosol fire extinguishing machine can’t be utilized to put out the subsequent fires

①Substances that can be oxidized without having air, such as nitrocellulose, gunpowder, etc.; Lively metals, which include potassium, sodium, magnesium, titanium, and so on.; compounds which can decompose by them selves, including selected peroxides, hydrazine, etcetera. Metallic hydrides, for instance potassium fluoride, sodium hydride, and so on. Organic substances, for example phosphorus. Potent oxidants, such as nitrogen oxide, fluorine, and so forth.

② Deep fireplace of combustible stable resources.

③ Hearth in crowded sites, such as theaters, auditoriums, etcetera.

④ Fireplace in places with explosion hazard, including workshops with explosive dust.

⑤ Extremely-clean natural environment, like pharmaceutical workshops, chip processing places, clinical rooms, etc.

Aerosol fireplace extinguishing Functioning principle

The 4 things of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The hearth extinguishing mechanism of fire extinguishing fuel is usually to eliminate one or numerous on the four elements of combustion.

The reliable hearth extinguishing agent while in the S-sort aerosol fireplace extinguishing machine is started off by energy, and it undergoes redox response to variety numerous agglomerated fireplace extinguishing aerosols, and its composition is mainly N2, a little number of CO2, and metal salt stable particles.

Aerosol fire extinguishing system is as follows

System of endothermic cooling and fire extinguishing

Metal salt particles absorb a large amount of warmth at significant temperatures, and bear Bodily endothermic processes like thermal melting and gasification. The flame temperature is reduced and after that radiated to the combustible combustion area for gasification of combustible molecules and vaporized combustible molecules. The heat of pyrolysis of combustion molecules into absolutely free radicals will minimize, along with the combustion reaction speed might be suppressed to a specific extent.

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