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What is Aerosol fireplace extinguishing

What is aerosol hearth extinguisher? Aerosol fire extinguishing technological know-how is a fresh variety of fire extinguishing know-how formulated on the basis of navy pyrotechnics.

The 1st era of aerosol hearth extinguishing technologies was born within our state, also called smoke fire extinguishing technologies, which started during the early nineteen sixties. It absolutely was finished by scientific scientists from the Tianjin Hearth Research Institute of Community Security, who independently developed an computerized smoke fire extinguishing system, which is mainly utilized to extinguish fires at school A, B, and C liquid storage tanks.

From the early 1980s, While using the emergence of environmental safety problems of “halon fireplace extinguishing agent”, discovering alternate options to halon turned a significant analysis subject.

At the conclusion of the 1980s, Russian researchers initial succeeded in investigating aerosol hearth extinguishing engineering that could extinguish fires within a submerged manner, which opened up a different way for halon substitution exploration. Subsequently, aerosol hearth extinguishing technology has captivated the eye in the Worldwide Neighborhood, and countries which include China, The usa, Australia, Malaysia together with other international locations have also begun analysis on new aerosol hearth extinguishing systems.

In most cases, aerosol is really a secure condition method formed through the dispersion of good solid or liquid particles in a gas. Skillfully, it refers to some colloidal program that works by using gasoline (typically air) as the dispersion medium and good or liquid particles since the dispersant.Frequent aerosols in character—clouds, smoke, fog, etcetera.The size on the particles in aerosols is mostly from the get of 10-five to ten-1μm, that has gasoline fluidity and will diffuse about obstructions.

The medicament from the aerosol fire suppression program product is solid, along with the element emitted with the medicament with the oxidation-reduction reaction is aerosol. The very first era of aerosol fireplace extinguishing technology-smoke fireplace extinguishing technologies.

K-form aerosol hearth extinguisher, also called potassium salt hearth extinguishing engineering, is the second phase of the event of aerosol fireplace extinguishing technological know-how, which commenced in the former Soviet Union from the mid-sixties. Our place started off late During this regard, setting up from the early nineties.

In this sort of aerosol building agent, potassium nitrate is especially utilised as the key oxidant. Its sprays have significant hearth extinguishing performance, but as they include a great deal of potassium ions, Straightforward to soak up moisture, forming a yellow and sticky potent alkaline conductive liquid movie, this compound is rather harmful to electronic machines, so K-style aerosol automatic fire extinguishing gadget can’t be Employed in electronic tools, precision instruments and cultural relics Archive location. At the moment, the use available in the market is progressively lowering.

The 3rd-era aerosol (S variety) is mainly fabricated from strontium salt as the key oxidant. Not like the next-era potassium salt (K-style) aerosol, strontium ions do not absorb dampness, never sort a conductive solution, and will not likely trigger harm to electrical gear. In 2001, China Cellular Communications Company chosen the strontium salt aerosol (S-style aerosol computerized fire extinguishing device) made by the corporation right after rigorous inspection and verification to guard its communication base stations and other spots Geared up with innovative Digital tools.

At present, strontium salt aerosol products are already utilized in A large number of engineering tasks, and the 3rd-era aerosol has become An increasing number of approved by customers

Aerosol hearth extinguisher software variety

a. Electrical hearth

Interaction place, conversation base station, electronic Personal computer home, and many others.;

Electrical fires in sites made up of precision devices and devices, for example electric power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, etcetera.

b. Sound floor fire

Surface hearth of combustible stable products in sites the place combustible reliable components are utilised or saved.

c. Liquid fire

Liquid fires in areas exactly where diesel oil is produced, made use of or stored (besides -35 diesel), large oil, transformer oil, animal and vegetable oil along with other flammable liquids of Class C; Just before extinguishing a gas fireplace, the fuel resource might be Lower off.

Aerosol hearth suppression system application .

d. The S-kind aerosol fire extinguishing unit can not be used to put out the next fires

①Substances that may be oxidized with no air, for example nitrocellulose, gunpowder, and so on.; Energetic metals, including potassium, sodium, magnesium, titanium, and so forth.; compounds that could decompose by on their own, for example sure peroxides, hydrazine, and so on. Metallic hydrides, for instance potassium fluoride, sodium hydride, etc. All-natural substances, for example phosphorus. Robust oxidants, which include nitrogen oxide, fluorine, and many others.

② Deep hearth of combustible strong elements.

③ Fireplace in crowded places, which include theaters, auditoriums, etc.

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

⑤ Extremely-cleanse ecosystem, for instance pharmaceutical workshops, chip processing destinations, healthcare rooms, and many others.

Aerosol hearth extinguishing Doing work principle

The 4 factors of combustion: combustibles, oxidizer, temperature and uninhibited chain reaction. The fire extinguishing system of hearth extinguishing gas is to eliminate one particular or a number of of your four factors of combustion.

The reliable hearth extinguishing agent in the S-kind aerosol fire extinguishing machine is begun by electricity, and it undergoes redox response to type numerous agglomerated fire extinguishing aerosols, and its composition is especially N2, a little amount of CO2, and steel salt sound particles.

Aerosol hearth extinguishing system is as follows

Mechanism of endothermic cooling and hearth extinguishing

Metallic salt particles soak up a great deal of warmth at large temperatures, and endure Bodily endothermic procedures such as thermal melting and gasification. The flame temperature is decreased after which radiated into the combustible combustion surface for gasification of combustible molecules and vaporized combustible molecules. The heat of pyrolysis of combustion molecules into totally free radicals will minimize, as well as the combustion reaction pace will likely be suppressed to a certain extent.

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