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Exactly what is Aerosol fire extinguishing

What on earth is aerosol fireplace extinguisher? Aerosol fireplace extinguishing technologies is a different form of fireplace extinguishing engineering designed on The premise of armed forces pyrotechnics.

The 1st era of aerosol fireplace extinguishing engineering was born in our nation, generally known as smoke fire extinguishing know-how, which started within the early sixties. It was finished by scientific scientists with the Tianjin Fireplace Exploration Institute of Public Safety, who independently designed an computerized smoke hearth extinguishing program, which is mainly utilized to extinguish fires in school A, B, and C liquid storage tanks.

While in the early 1980s, With all the emergence of environmental safety complications of “halon fireplace extinguishing agent”, locating choices to halon turned a vital analysis topic.

At the conclusion of the nineteen eighties, Russian scientists to start with succeeded in exploring aerosol fireplace extinguishing engineering which will extinguish fires in the submerged method, which opened up a different way for halon substitution exploration. Subsequently, aerosol fire extinguishing technology has captivated the eye of your international community, and nations including China, The us, Australia, Malaysia together with other nations have also begun investigate on new aerosol hearth extinguishing technologies.

Generally speaking, aerosol is a secure point out method fashioned by the dispersion of fantastic strong or liquid particles in a very gasoline. Professionally, it refers to some colloidal program that works by using gasoline (generally air) because the dispersion medium and strong or liquid particles as the dispersant.Widespread aerosols in nature—clouds, smoke, fog, and many others.The scale on the particles in aerosols is usually while in the purchase of 10-5 to ten-oneμm, that has gasoline fluidity and will diffuse about hurdles.

The medicament in the aerosol fire suppression procedure machine is stable, and also the ingredient emitted from the medicament from the oxidation-reduction reaction is aerosol. The initial era of aerosol fireplace extinguishing technologies-smoke hearth extinguishing technologies.

K-type aerosol hearth extinguisher, also referred to as potassium salt hearth extinguishing technologies, is the next stage of the event of aerosol fire extinguishing technological know-how, which started in the former Soviet Union in the mid-1960s. Our region begun late in this regard, setting up within the early 1990s.

In this type of aerosol producing agent, potassium nitrate is mainly utilised as the principle oxidant. Its sprays have superior fireplace extinguishing effectiveness, but because they contain a great deal of potassium ions, Easy to soak up dampness, forming a yellow and sticky strong alkaline conductive liquid movie, this substance is very harmful to electronic gear, so K-variety aerosol automated fireplace extinguishing product cannot be Employed in electronic devices, precision devices and cultural relics Archive spot. At the moment, the use out there is steadily reducing.

The 3rd-technology aerosol (S sort) is especially crafted from strontium salt as the principle oxidant. As opposed to the next-technology potassium salt (K-kind) aerosol, strontium ions don’t take in humidity, do not variety a conductive Option, and will never bring about damage to electrical machines. In 2001, China Cellular Communications Corporation picked the strontium salt aerosol (S-style aerosol automatic fireplace extinguishing gadget) produced by the organization right after rigorous inspection and verification to safeguard its communication base stations and also other sites Outfitted with innovative Digital products.

At the moment, strontium salt aerosol goods are applied in A large number of engineering assignments, and the third-era aerosol has grown to be Progressively more accepted by users

Aerosol fireplace extinguisher software selection

a. Electrical hearth

Interaction home, interaction foundation station, Digital Laptop or computer area, and so forth.;

Electrical fires in places made up of precision devices and tools, such as ability distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, etcetera.

b. Solid area hearth

Surface area fireplace of combustible stable resources in places where combustible strong elements are made use of or stored.

c. Liquid fireplace

Liquid fires in locations the place diesel oil is generated, utilized or saved (other than -35 diesel), hefty oil, transformer oil, animal and vegetable oil along with other flammable liquids of Group C; Before extinguishing a fuel fireplace, the gasoline supply is often cut off.

Aerosol fireplace suppression method software .

d. The S-sort aerosol fireplace extinguishing machine can’t be used to place out the next fires

①Substances that could be oxidized without having air, such as nitrocellulose, gunpowder, and so forth.; Lively metals, for example potassium, sodium, magnesium, titanium, and many others.; compounds that will decompose by by themselves, including sure peroxides, hydrazine, and many others. Metallic hydrides, for example potassium fluoride, sodium hydride, etcetera. Purely natural substances, for instance phosphorus. Strong oxidants, like nitrogen oxide, fluorine, and so forth.

② Deep fire of combustible reliable supplies.

③ Fire in crowded places, including theaters, auditoriums, etc.

④ Fireplace in destinations with explosion hazard, like workshops with explosive dust.

⑤ Extremely-clear ecosystem, for example pharmaceutical workshops, chip processing areas, clinical rooms, and so on.

Aerosol hearth extinguishing working principle

The 4 elements of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The fireplace extinguishing system of hearth extinguishing gas would be to get rid of a single or various from the 4 elements of combustion.

The stable fireplace extinguishing agent within the S-type aerosol fireplace extinguishing product is commenced by energy, and it undergoes redox response to form a large number of agglomerated fireplace extinguishing aerosols, and its composition is especially N2, a small quantity of CO2, and steel salt reliable particles.

Aerosol fireplace extinguishing system is as follows

Mechanism of endothermic cooling and fire extinguishing

Metallic salt particles absorb a large amount of warmth at superior temperatures, and undergo Bodily endothermic procedures for example thermal melting and gasification. The flame temperature is reduced then radiated to the combustible combustion floor for gasification of combustible molecules and vaporized combustible molecules. The heat of pyrolysis of combustion molecules into no cost radicals will reduce, and the combustion response speed will be suppressed to a specific extent.

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