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What exactly is Aerosol fireplace extinguishing

What exactly is aerosol fire extinguisher? Aerosol hearth extinguishing know-how is a whole new form of hearth extinguishing know-how designed on The idea of armed forces pyrotechnics.

The first era of aerosol fire extinguishing technological know-how was born in our place, generally known as smoke fireplace extinguishing technological know-how, which started while in the early sixties. It had been finished by scientific scientists from the Tianjin Fire Study Institute of Public Safety, who independently designed an automatic smoke hearth extinguishing technique, which is mainly utilized to extinguish fires at school A, B, and C liquid storage tanks.

In the early nineteen eighties, with the emergence of environmental protection issues of “halon fireplace extinguishing agent”, locating alternatives to halon became a very important analysis subject matter.

At the end of the eighties, Russian experts very first succeeded in investigating aerosol hearth extinguishing technology which will extinguish fires in the submerged way, which opened up a fresh way for halon substitution investigate. Subsequently, aerosol hearth extinguishing engineering has captivated the attention in the Intercontinental Neighborhood, and countries like China, The usa, Australia, Malaysia together with other international locations have also started analysis on new aerosol fireplace extinguishing systems.

In most cases, aerosol is usually a steady condition method shaped by the dispersion of great solid or liquid particles in a gas. Professionally, it refers to the colloidal technique that takes advantage of fuel (ordinarily air) because the dispersion medium and solid or liquid particles since the dispersant.Typical aerosols in nature—clouds, smoke, fog, and so forth.The dimensions in the particles in aerosols is mostly from the order of ten-five to 10-oneμm, which has fuel fluidity and can diffuse close to obstructions.

The medicament while in the aerosol hearth suppression technique product is reliable, as well as ingredient emitted with the medicament from the oxidation-reduction response is aerosol. The first technology of aerosol fireplace extinguishing engineering-smoke fire extinguishing technological know-how.

K-style aerosol hearth extinguisher, also referred to as potassium salt fireplace extinguishing technological innovation, is the next phase of the development of aerosol fire extinguishing technologies, which started in the former Soviet Union inside the mid-sixties. Our nation started late During this regard, starting up during the early nineties.

In this sort of aerosol generating agent, potassium nitrate is mainly applied as the principle oxidant. Its sprays have superior fire extinguishing efficiency, but as they incorporate a large amount of potassium ions, Quick to absorb moisture, forming a yellow and sticky potent alkaline conductive liquid movie, this compound is rather damaging to Digital devices, so K-form aerosol automated fire extinguishing unit cannot be Employed in Digital gear, precision devices and cultural relics Archive area. At present, the use in the market is gradually lowering.

The 3rd-generation aerosol (S type) is mainly crafted from strontium salt as the main oxidant. As opposed to the second-era potassium salt (K-variety) aerosol, strontium ions usually do not absorb moisture, usually do not type a conductive Remedy, and will never bring about damage to electrical equipment. In 2001, China Cell Communications Corporation picked the strontium salt aerosol (S-sort aerosol automatic hearth extinguishing machine) made by the organization following rigorous inspection and verification to shield its interaction foundation stations together with other places equipped with refined electronic gear.

At the moment, strontium salt aerosol merchandise are applied in Countless engineering projects, as well as the third-era aerosol is becoming A lot more acknowledged by users

Aerosol fireplace extinguisher software assortment

a. Electrical fireplace

Conversation space, communication base station, Digital computer space, and so on.;

Electrical fires in spots that contains precision instruments and tools, which include electrical power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and so forth.

b. Solid surface fire

Surface fireplace of combustible reliable components in sites exactly where combustible sound elements are utilized or stored.

c. Liquid hearth

Liquid fires in locations in which diesel oil is created, utilized or saved (apart from -35 diesel), weighty oil, transformer oil, animal and vegetable oil and also other flammable liquids of Classification C; Just before extinguishing a fuel fire, the fuel source can be Reduce off.

Aerosol hearth suppression technique application .

d. The S-style aerosol fireplace extinguishing device cannot be utilized to put out the following fires

①Substances which might be oxidized with no air, such as nitrocellulose, gunpowder, and so on.; Lively metals, such as potassium, sodium, magnesium, titanium, and so on.; compounds that may decompose by themselves, for instance selected peroxides, hydrazine, and so forth. Steel hydrides, like potassium fluoride, sodium hydride, etc. Natural substances, which include phosphorus. Robust oxidants, for instance nitrogen oxide, fluorine, and so on.

② Deep hearth of combustible good components.

③ Hearth in crowded places, for instance theaters, auditoriums, etcetera.

④ Fireplace in sites with explosion hazard, which include workshops with explosive dust.

⑤ Ultra-clear atmosphere, which include pharmaceutical workshops, chip processing areas, healthcare rooms, and so forth.

Aerosol fire extinguishing Performing basic principle

The four aspects of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The fire extinguishing system of hearth extinguishing gasoline is to get rid of just one or various in the four elements of combustion.

The reliable hearth extinguishing agent during the S-kind aerosol hearth extinguishing product is started off by electrical energy, and it undergoes redox response to sort a large number of agglomerated fireplace extinguishing aerosols, and its composition is mainly N2, a little degree of CO2, and metal salt solid particles.

Aerosol fire extinguishing mechanism is as follows

Mechanism of endothermic cooling and fireplace extinguishing

Metallic salt particles soak up a great deal of warmth at superior temperatures, and go through Bodily endothermic procedures such as thermal melting and gasification. The flame temperature is lowered and afterwards radiated to the combustible combustion surface for gasification of combustible molecules and vaporized combustible molecules. The heat of pyrolysis of combustion molecules into free of charge radicals will minimize, as well as combustion reaction speed are going to be suppressed to a certain extent.

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