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Exactly what is Aerosol fireplace extinguishing

What on earth is aerosol fire extinguisher? Aerosol fire extinguishing technologies is a completely new variety of fireplace extinguishing know-how formulated on The idea of military pyrotechnics.

The first technology of aerosol fireplace extinguishing technological know-how was born in our nation, generally known as smoke fire extinguishing technological know-how, which began during the early nineteen sixties. It was accomplished by scientific researchers from your Tianjin Hearth Study Institute of General public Protection, who independently designed an computerized smoke hearth extinguishing procedure, which is mainly accustomed to extinguish fires at school A, B, and C liquid storage tanks.

In the early 1980s, Together with the emergence of environmental protection issues of “halon hearth extinguishing agent”, acquiring alternate options to halon grew to become an important investigate subject.

At the end of the 1980s, Russian researchers initially succeeded in looking into aerosol hearth extinguishing know-how that could extinguish fires in a very submerged manner, which opened up a completely new way for halon substitution analysis. Subsequently, aerosol hearth extinguishing engineering has attracted the eye in the international Local community, and international locations for example China, America, Australia, Malaysia together with other countries have also started analysis on new aerosol fireplace extinguishing systems.

In most cases, aerosol is usually a steady condition technique shaped via the dispersion of fantastic good or liquid particles inside a gas. Professionally, it refers into a colloidal program that makes use of gas (typically air) as the dispersion medium and stable or liquid particles as the dispersant.Common aerosols in character—clouds, smoke, fog, and many others.The size of the particles in aerosols is generally while in the purchase of ten-five to 10-1μm, that has gas fluidity and might diffuse around obstructions.

The medicament while in the aerosol fireplace suppression system unit is good, as well as ingredient emitted because of the medicament in the oxidation-reduction reaction is aerosol. The first technology of aerosol hearth extinguishing technology-smoke fire extinguishing technological innovation.

K-sort aerosol hearth extinguisher, also referred to as potassium salt fire extinguishing engineering, is the next phase of the development of aerosol hearth extinguishing engineering, which started in the former Soviet Union within the mid-nineteen sixties. Our region began late During this regard, beginning within the early nineties.

In this kind of aerosol building agent, potassium nitrate is mainly utilized as the primary oxidant. Its sprays have higher fire extinguishing efficiency, but given that they incorporate a great deal of potassium ions, Quick to absorb humidity, forming a yellow and sticky powerful alkaline conductive liquid film, this material may be very damaging to electronic tools, so K-kind aerosol automated fire extinguishing device can not be Utilized in Digital gear, precision instruments and cultural relics Archive place. At present, the use out there is step by step decreasing.

The third-generation aerosol (S sort) is especially manufactured from strontium salt as the main oxidant. In contrast to the second-generation potassium salt (K-variety) aerosol, strontium ions do not soak up dampness, do not kind a conductive Answer, and will not likely cause harm to electrical machines. In 2001, China Cellular Communications Company selected the strontium salt aerosol (S-form aerosol automated fire extinguishing gadget) produced by the business right after demanding inspection and verification to protect its communication foundation stations and various locations equipped with refined electronic products.

At the moment, strontium salt aerosol goods have been used in 1000s of engineering assignments, and also the third-technology aerosol is becoming An increasing number of accepted by users

Aerosol hearth extinguisher application range

a. Electrical fire

Conversation place, communication base station, Digital Pc place, etcetera.;

Electrical fires in sites that contains precision instruments and gear, such as electrical power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and so forth.

b. Sound floor fire

Surface hearth of combustible strong products in locations where by combustible solid materials are used or saved.

c. Liquid fireplace

Liquid fires in locations where diesel oil is generated, made use of or saved (besides -35 diesel), heavy oil, transformer oil, animal and vegetable oil as well as other flammable liquids of Category C; Before extinguishing a gasoline fire, the gas source is usually Lower off.

Aerosol hearth suppression program software .

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

①Substances which might be oxidized with out air, such as nitrocellulose, gunpowder, etcetera.; active metals, which include potassium, sodium, magnesium, titanium, and so forth.; compounds that may decompose by on their own, like selected peroxides, hydrazine, etc. Steel hydrides, like potassium fluoride, sodium hydride, and so forth. Pure substances, which include phosphorus. Solid oxidants, which include nitrogen oxide, fluorine, and so forth.

② Deep fireplace of combustible strong components.

③ Hearth in crowded destinations, like theaters, auditoriums, etcetera.

④ Fire in areas with explosion hazard, such as workshops with explosive dust.

⑤ Extremely-thoroughly clean atmosphere, such as pharmaceutical workshops, chip processing sites, professional medical rooms, etcetera.

Aerosol fire extinguishing Doing work principle

The 4 elements of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The fire extinguishing system of hearth extinguishing fuel is to do away with just one or many of the four things of combustion.

The stable fire extinguishing agent inside the S-variety aerosol fireplace extinguishing gadget is started off by electrical power, and it undergoes redox reaction to variety a lot of agglomerated hearth extinguishing aerosols, and its composition is mainly N2, a little number of CO2, and metal salt stable particles.

Aerosol fire extinguishing system is as follows

Mechanism of endothermic cooling and hearth extinguishing

Metallic salt particles soak up a great deal of warmth at high temperatures, and undergo Bodily endothermic processes which include thermal melting and gasification. The flame temperature is lowered then radiated to the combustible combustion floor for gasification of combustible molecules and vaporized combustible molecules. The warmth of pyrolysis of combustion molecules into totally free radicals will lessen, plus the combustion reaction pace will be suppressed to a specific extent.

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