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What is Aerosol fire extinguishing

What exactly is aerosol fire extinguisher? Aerosol fireplace extinguishing technological know-how is a brand new type of hearth extinguishing engineering produced on The premise of armed forces pyrotechnics.

The very first technology of aerosol hearth extinguishing engineering was born inside our nation, often known as smoke fire extinguishing technological know-how, which commenced from the early 1960s. It was completed by scientific scientists in the Tianjin Fireplace Investigate Institute of Community Security, who independently developed an computerized smoke fire extinguishing method, which is especially utilized to extinguish fires in school A, B, and C liquid storage tanks.

In the early 1980s, With all the emergence of environmental security difficulties of “halon hearth extinguishing agent”, discovering solutions to halon turned a very important study matter.

At the conclusion of the eighties, Russian experts initially succeeded in investigating aerosol fire extinguishing engineering which can extinguish fires inside of a submerged manner, which opened up a new way for halon substitution exploration. Subsequently, aerosol hearth extinguishing technological know-how has captivated the attention in the Global Group, and international locations like China, the United States, Australia, Malaysia and other nations have also begun investigate on new aerosol hearth extinguishing technologies.

Most of the time, aerosol is a steady state program formed because of the dispersion of good reliable or liquid particles inside of a gas. Skillfully, it refers to some colloidal procedure that uses gas (ordinarily air) since the dispersion medium and good or liquid particles because the dispersant.Common aerosols in character—clouds, smoke, fog, and so on.The scale of the particles in aerosols is mostly in the buy of 10-5 to ten-1μm, which has gasoline fluidity and will diffuse around road blocks.

The medicament inside the aerosol fireplace suppression technique system is reliable, plus the part emitted via the medicament throughout the oxidation-reduction response is aerosol. The first generation of aerosol hearth extinguishing technologies-smoke hearth extinguishing technological innovation.

K-kind aerosol hearth extinguisher, also known as potassium salt fire extinguishing technologies, is the 2nd phase of the event of aerosol hearth extinguishing technological innovation, which began in the former Soviet Union while in the mid-1960s. Our state commenced late On this regard, commencing from the early 1990s.

In this type of aerosol producing agent, potassium nitrate is principally utilized as the most crucial oxidant. Its sprays have superior hearth extinguishing effectiveness, but mainly because they consist of a large amount of potassium ions, Effortless to absorb humidity, forming a yellow and sticky strong alkaline conductive liquid movie, this compound is quite harming to electronic products, so K-style aerosol computerized hearth extinguishing unit cannot be Employed in electronic products, precision devices and cultural relics Archive spot. At present, the use in the market is steadily decreasing.

The third-technology aerosol (S style) is mainly fabricated from strontium salt as the leading oxidant. Compared with the 2nd-era potassium salt (K-type) aerosol, strontium ions do not soak up moisture, never variety a conductive Option, and is not going to trigger harm to electrical devices. In 2001, China Mobile Communications Corporation chosen the strontium salt aerosol (S-form aerosol computerized fireplace extinguishing unit) produced by the business just after rigid inspection and verification to shield its interaction base stations as well as other sites Geared up with advanced electronic devices.

At the moment, strontium salt aerosol goods have already been utilized in thousands of engineering tasks, as well as 3rd-technology aerosol happens to be An increasing number of accepted by customers

Aerosol fireplace extinguisher application assortment

a. Electrical fireplace

Communication space, conversation foundation station, Digital Laptop area, etc.;

Electrical fires in destinations that contains precision instruments and gear, for instance electrical power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and so forth.

b. Reliable floor fireplace

Surface fire of combustible reliable resources in areas in which combustible stable supplies are used or stored.

c. Liquid fire

Liquid fires in locations where diesel oil is produced, used or saved (apart from -35 diesel), major oil, transformer oil, animal and vegetable oil and various flammable liquids of Classification C; Ahead of extinguishing a gasoline fire, the gas source is usually cut off.

Aerosol hearth suppression program software .

d. The S-variety aerosol fire extinguishing system cannot be utilized to set out the subsequent fires

①Substances that can be oxidized with out air, including nitrocellulose, gunpowder, etc.; active metals, for instance potassium, sodium, magnesium, titanium, etcetera.; compounds which can decompose by them selves, for instance specific peroxides, hydrazine, etc. Steel hydrides, such as potassium fluoride, sodium hydride, etc. Natural substances, for instance phosphorus. Potent oxidants, for instance nitrogen oxide, fluorine, and so on.

② Deep fire of combustible reliable products.

③ Hearth in crowded sites, including theaters, auditoriums, and many others.

④ Fireplace in places with explosion hazard, for example workshops with explosive dust.

⑤ Extremely-clean up surroundings, like pharmaceutical workshops, chip processing places, healthcare rooms, and many others.

Aerosol fire extinguishing Functioning principle

The four features of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The fireplace extinguishing mechanism of fire extinguishing gasoline would be to eradicate a single or many with the four features of combustion.

The stable fire extinguishing agent in the S-kind aerosol hearth extinguishing gadget is begun by energy, and it undergoes redox reaction to variety a large number of agglomerated fireplace extinguishing aerosols, and its composition is especially N2, a small number of CO2, and steel salt reliable particles.

Aerosol fire extinguishing system is as follows

Mechanism of endothermic cooling and hearth extinguishing

Metallic salt particles take in a great deal of heat at superior temperatures, and endure Bodily endothermic processes such as thermal melting and gasification. The flame temperature is reduced and afterwards radiated into the combustible combustion surface area for gasification of combustible molecules and vaporized combustible molecules. The heat of pyrolysis of combustion molecules into free radicals will lessen, plus the combustion reaction velocity will likely be suppressed to a particular extent.

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