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What exactly is Aerosol hearth extinguishing

What is aerosol fire extinguisher? Aerosol hearth extinguishing technological innovation is a brand new sort of fire extinguishing technological know-how created on The premise of army pyrotechnics.

The 1st technology of aerosol hearth extinguishing technologies was born in our region, generally known as smoke hearth extinguishing technology, which began while in the early 1960s. It absolutely was done by scientific scientists from your Tianjin Fireplace Investigation Institute of General public Stability, who independently created an computerized smoke hearth extinguishing method, which is principally used to extinguish fires at school A, B, and C liquid storage tanks.

In the early 1980s, With all the emergence of environmental defense issues of “halon fire extinguishing agent”, discovering choices to halon turned a crucial research topic.

At the conclusion of the eighties, Russian researchers initial succeeded in researching aerosol fireplace extinguishing engineering that will extinguish fires inside of a submerged method, which opened up a fresh way for halon substitution exploration. Subsequently, aerosol hearth extinguishing technology has attracted the eye on the international Group, and nations around the world such as China, The us, Australia, Malaysia and various nations around the world have also begun investigate on new aerosol hearth extinguishing technologies.

Most of the time, aerosol is usually a stable point out system shaped because of the dispersion of high-quality sound or liquid particles in the fuel. Skillfully, it refers into a colloidal technique that takes advantage of gas (usually air) as the dispersion medium and sound or liquid particles because the dispersant.Common aerosols in mother nature—clouds, smoke, fog, etc.The dimensions of your particles in aerosols is mostly from the order of ten-five to ten-oneμm, which has gasoline fluidity and will diffuse close to obstructions.

The medicament within the aerosol fireplace suppression technique gadget is strong, plus the ingredient emitted through the medicament through the oxidation-reduction response is aerosol. The primary generation of aerosol fire extinguishing technological innovation-smoke hearth extinguishing technological innovation.

K-sort aerosol fire extinguisher, also referred to as potassium salt fire extinguishing technologies, is the second stage of the event of aerosol hearth extinguishing technological innovation, which commenced in the former Soviet Union from the mid-sixties. Our state begun late Within this regard, starting within the early 1990s.

In this kind of aerosol generating agent, potassium nitrate is especially applied as the most crucial oxidant. Its sprays have higher hearth extinguishing performance, but as they contain a large amount of potassium ions, Quick to absorb dampness, forming a yellow and sticky potent alkaline conductive liquid movie, this compound is quite harming to electronic devices, so K-variety aerosol automated hearth extinguishing gadget can not be Employed in electronic devices, precision devices and cultural relics Archive spot. At present, the use in the market is progressively reducing.

The third-era aerosol (S kind) is mainly fabricated from strontium salt as the main oxidant. Compared with the 2nd-technology potassium salt (K-type) aerosol, strontium ions don’t take in dampness, will not sort a conductive Alternative, and won’t induce harm to electrical products. In 2001, China Cellular Communications Corporation selected the strontium salt aerosol (S-form aerosol automated fire extinguishing product) made by the corporate following rigid inspection and verification to protect its communication base stations together with other spots Geared up with complex Digital machines.

At present, strontium salt aerosol products are actually utilized in A huge number of engineering assignments, as well as 3rd-era aerosol has grown to be A lot more recognized by buyers

Aerosol fireplace extinguisher software selection

a. Electrical fireplace

Interaction room, interaction base station, Digital Pc space, etc.;

Electrical fires in places containing precision instruments and devices, including electric power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, etcetera.

b. Reliable floor fire

Area fire of combustible strong elements in spots where combustible good elements are utilized or saved.

c. Liquid fireplace

Liquid fires in destinations where by diesel oil is generated, utilised or saved (except -35 diesel), major oil, transformer oil, animal and vegetable oil along with other flammable liquids of Category C; Right before extinguishing a fuel fire, the gasoline source might be Slash off.

Aerosol hearth suppression procedure application .

d. The S-sort aerosol hearth extinguishing system cannot be utilized to place out the following fires

①Substances that can be oxidized devoid of air, for instance nitrocellulose, gunpowder, etcetera.; Energetic metals, including potassium, sodium, magnesium, titanium, etcetera.; compounds which will decompose by themselves, which include specified peroxides, hydrazine, and so on. Steel hydrides, including potassium fluoride, sodium hydride, and so forth. Purely natural substances, for instance phosphorus. Powerful oxidants, such as nitrogen oxide, fluorine, and so forth.

② Deep fire of combustible good elements.

③ Fireplace in crowded areas, like theaters, auditoriums, etc.

④ Hearth in locations with explosion hazard, which include workshops with explosive dust.

⑤ Extremely-clean up setting, for example pharmaceutical workshops, chip processing areas, healthcare rooms, and so on.

Aerosol hearth extinguishing Doing work basic principle

The four aspects of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The fireplace extinguishing mechanism of fireplace extinguishing gas is always to get rid of just one or various with the 4 elements of combustion.

The solid fireplace extinguishing agent during the S-style aerosol fireplace extinguishing system is commenced by electricity, and it undergoes redox response to type a large number of agglomerated fire extinguishing aerosols, and its composition is principally N2, a little amount of CO2, and metallic salt solid particles.

Aerosol fireplace extinguishing system is as follows

System of endothermic cooling and fire extinguishing

Steel salt particles take up a great deal of warmth at superior temperatures, and undergo Bodily endothermic processes including thermal melting and gasification. The flame temperature is reduced and after that radiated to the combustible combustion surface for gasification of combustible molecules and vaporized combustible molecules. The warmth of pyrolysis of combustion molecules into no cost radicals will reduce, as well as combustion reaction velocity might be suppressed to a certain extent.

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