Exactly what is Aerosol fireplace extinguishing

What on earth is aerosol fire extinguisher? Aerosol hearth extinguishing technology is a fresh style of fire extinguishing engineering produced on The premise of military pyrotechnics.

The initial generation of aerosol hearth extinguishing technological know-how was born within our place, also called smoke hearth extinguishing know-how, which started during the early 1960s. It had been done by scientific scientists through the Tianjin Fire Investigate Institute of Community Stability, who independently produced an automatic smoke fire extinguishing system, which is mainly utilized to extinguish fires at school A, B, and C liquid storage tanks.

Within the early eighties, While using the emergence of environmental protection difficulties of “halon fire extinguishing agent”, locating choices to halon turned an important research subject.

At the end of the 1980s, Russian scientists initially succeeded in investigating aerosol hearth extinguishing technologies that may extinguish fires inside of a submerged way, which opened up a fresh way for halon substitution investigation. Subsequently, aerosol hearth extinguishing technological know-how has attracted the eye on the international Local community, and nations for example China, America, Australia, Malaysia and also other countries have also begun exploration on new aerosol fire extinguishing technologies.

Most of the time, aerosol can be a stable state program shaped from the dispersion of high-quality reliable or liquid particles inside of a gasoline. Skillfully, it refers to the colloidal program that utilizes gasoline (generally air) as the dispersion medium and reliable or liquid particles as being the dispersant.Widespread aerosols in mother nature—clouds, smoke, fog, etcetera.The size from the particles in aerosols is generally within the purchase of ten-five to 10-1μm, that has gas fluidity and can diffuse all around obstacles.

The medicament inside the aerosol fire suppression program unit is sound, plus the part emitted because of the medicament through the oxidation-reduction reaction is aerosol. The very first generation of aerosol fire extinguishing know-how-smoke hearth extinguishing technology.

K-sort aerosol fireplace extinguisher, also called potassium salt fireplace extinguishing technological know-how, is the next stage of the development of aerosol fire extinguishing technological know-how, which began in the former Soviet Union during the mid-nineteen sixties. Our region started late in this regard, starting up while in the early nineteen nineties.

In such a aerosol creating agent, potassium nitrate is principally made use of as the most crucial oxidant. Its sprays have higher fire extinguishing effectiveness, but mainly because they have a large amount of potassium ions, Quick to absorb dampness, forming a yellow and sticky solid alkaline conductive liquid film, this material is extremely harming to Digital machines, so K-kind aerosol computerized fireplace extinguishing system can’t be Employed in Digital equipment, precision instruments and cultural relics Archive place. At present, the use available in the market is gradually decreasing.

The third-generation aerosol (S sort) is especially made from strontium salt as the key oxidant. In contrast to the 2nd-generation potassium salt (K-kind) aerosol, strontium ions will not soak up dampness, never kind a conductive Option, and will not likely bring about damage to electrical equipment. In 2001, China Cell Communications Corporation chosen the strontium salt aerosol (S-style aerosol automated fireplace extinguishing machine) produced by the company right after rigid inspection and verification to shield its interaction base stations and other sites Outfitted with innovative electronic machines.

At the moment, strontium salt aerosol items have been utilized in thousands of engineering projects, as well as the third-technology aerosol happens to be more and more acknowledged by users

Aerosol fire extinguisher software selection

a. Electrical fire

Communication place, conversation foundation station, electronic Pc area, etc.;

Electrical fires in places made up of precision instruments and gear, for instance ability distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, etcetera.

b. Solid surface area hearth

Surface fire of combustible solid components in destinations wherever combustible sound materials are made use of or stored.

c. Liquid hearth

Liquid fires in places where diesel oil is produced, applied or saved (other than -35 diesel), weighty oil, transformer oil, animal and vegetable oil and various flammable liquids of Group C; Ahead of extinguishing a gasoline fireplace, the gasoline source could be cut off.

Aerosol hearth suppression technique software .

d. The S-sort aerosol hearth extinguishing gadget cannot be used to place out the next fires

①Substances which can be oxidized without air, like nitrocellulose, gunpowder, and so on.; Lively metals, for instance potassium, sodium, magnesium, titanium, and so forth.; compounds which will decompose by by themselves, like certain peroxides, hydrazine, and so forth. Metal hydrides, like potassium fluoride, sodium hydride, etc. Purely natural substances, like phosphorus. Powerful oxidants, including nitrogen oxide, fluorine, etc.

② Deep fire of combustible reliable elements.

③ Fire in crowded destinations, for example theaters, auditoriums, and many others.

④ Fire in spots with explosion hazard, including workshops with explosive dust.

⑤ Ultra-clean up environment, like pharmaceutical workshops, chip processing locations, clinical rooms, etcetera.

Aerosol fire extinguishing Functioning principle

The 4 elements of combustion: combustibles, oxidizer, temperature and uninhibited chain reaction. The hearth extinguishing system of hearth extinguishing gas is usually to eliminate one or quite a few from the 4 factors of combustion.

The reliable fire extinguishing agent in the S-style aerosol fire extinguishing unit is begun by electrical power, and it undergoes redox reaction to sort a lot of agglomerated fire extinguishing aerosols, and its composition is mainly N2, a small number of CO2, and metallic salt reliable particles.

Aerosol hearth extinguishing mechanism is as follows

System of endothermic cooling and hearth extinguishing

Steel salt particles take in a great deal of warmth at superior temperatures, and go through Bodily endothermic processes for instance thermal melting and gasification. The flame temperature is lowered and afterwards radiated to the combustible combustion area for gasification of combustible molecules and vaporized combustible molecules. The warmth of pyrolysis of combustion molecules into cost-free radicals will lessen, and also the combustion reaction velocity might be suppressed to a particular extent.

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