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What on earth is Aerosol fire extinguishing

Exactly what is aerosol hearth extinguisher? Aerosol fireplace extinguishing technology is a different sort of fireplace extinguishing know-how made on The premise of armed service pyrotechnics.

The main era of aerosol fire extinguishing technology was born inside our place, also called smoke fire extinguishing technologies, which started during the early 1960s. It absolutely was completed by scientific researchers within the Tianjin Fireplace Investigate Institute of Public Security, who independently developed an automated smoke hearth extinguishing program, which is principally utilized to extinguish fires in school A, B, and C liquid storage tanks.

While in the early 1980s, Using the emergence of environmental protection challenges of “halon fire extinguishing agent”, obtaining choices to halon grew to become a significant investigate subject matter.

At the conclusion of the eighties, Russian researchers to start with succeeded in looking into aerosol fireplace extinguishing technologies which can extinguish fires in a very submerged manner, which opened up a different way for halon substitution analysis. Subsequently, aerosol hearth extinguishing technologies has captivated the attention from the international Local community, and nations for instance China, the United States, Australia, Malaysia together with other countries have also started research on new aerosol fireplace extinguishing systems.

In most cases, aerosol is really a steady state process formed with the dispersion of good solid or liquid particles in a gasoline. Professionally, it refers to some colloidal system that utilizes fuel (usually air) since the dispersion medium and solid or liquid particles given that the dispersant.Typical aerosols in nature—clouds, smoke, fog, etcetera.The scale from the particles in aerosols is mostly from the get of 10-five to 10-oneμm, that has fuel fluidity and might diffuse all around obstacles.

The medicament from the aerosol hearth suppression process unit is sound, along with the component emitted via the medicament through the oxidation-reduction reaction is aerosol. The very first era of aerosol fireplace extinguishing engineering-smoke fire extinguishing technological know-how.

K-style aerosol fire extinguisher, also referred to as potassium salt fire extinguishing technology, is the 2nd stage of the event of aerosol hearth extinguishing technological know-how, which began in the previous Soviet Union within the mid-nineteen sixties. Our country started out late On this regard, commencing in the early 1990s.

In this kind of aerosol producing agent, potassium nitrate is especially utilised as the most crucial oxidant. Its sprays have superior fireplace extinguishing efficiency, but since they consist of a large amount of potassium ions, Easy to soak up humidity, forming a yellow and sticky robust alkaline conductive liquid movie, this substance is quite detrimental to Digital products, so K-form aerosol automatic hearth extinguishing system cannot be Utilized in electronic machines, precision instruments and cultural relics Archive location. At the moment, the use on the market is slowly lowering.

The third-technology aerosol (S style) is mainly made of strontium salt as the primary oxidant. In contrast to the 2nd-era potassium salt (K-sort) aerosol, strontium ions don’t absorb dampness, do not sort a conductive Resolution, and is not going to lead to damage to electrical devices. In 2001, China Mobile Communications Corporation selected the strontium salt aerosol (S-style aerosol automatic hearth extinguishing gadget) made by the organization right after demanding inspection and verification to shield its communication foundation stations and also other places Geared up with refined electronic devices.

At this time, strontium salt aerosol items are already utilized in A huge number of engineering initiatives, and the 3rd-technology aerosol is becoming Progressively more acknowledged by buyers

Aerosol hearth extinguisher application range

a. Electrical hearth

Communication home, interaction base station, Digital Pc place, etcetera.;

Electrical fires in destinations that contains precision devices and gear, such as energy distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and many others.

b. Solid surface fire

Area hearth of combustible good components in sites where combustible good products are employed or stored.

c. Liquid fireplace

Liquid fires in areas the place diesel oil is generated, made use of or saved (except -35 diesel), hefty oil, transformer oil, animal and vegetable oil and other flammable liquids of Class C; In advance of extinguishing a gasoline fireplace, the gasoline source is often Reduce off.

Aerosol fire suppression program application .

d. The S-form aerosol hearth extinguishing machine can’t be accustomed to put out the next fires

①Substances which might be oxidized devoid of air, which include nitrocellulose, gunpowder, and many others.; Lively metals, for instance potassium, sodium, magnesium, titanium, and so on.; compounds which can decompose by on their own, which include particular peroxides, hydrazine, and so forth. Steel hydrides, like potassium fluoride, sodium hydride, and so on. Pure substances, including phosphorus. Potent oxidants, for example nitrogen oxide, fluorine, and so forth.

② Deep fire of combustible sound products.

③ Fire in crowded locations, such as theaters, auditoriums, etcetera.

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

⑤ Ultra-cleanse ecosystem, including pharmaceutical workshops, chip processing destinations, health-related rooms, and so forth.

Aerosol hearth extinguishing Doing work basic principle

The four aspects of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The fireplace extinguishing system of fire extinguishing gasoline is to eliminate a person or various in the 4 features of combustion.

The solid fire extinguishing agent from the S-variety aerosol hearth extinguishing machine is started off by electrical energy, and it undergoes redox reaction to form a lot of agglomerated fireplace extinguishing aerosols, and its composition is especially N2, a little number of CO2, and metallic salt solid particles.

Aerosol hearth extinguishing system is as follows

Mechanism of endothermic cooling and fireplace extinguishing

Metallic salt particles absorb a great deal of heat at high temperatures, and undergo Actual physical endothermic procedures like thermal melting and gasification. The flame temperature is lowered and afterwards radiated to your combustible combustion surface for gasification of combustible molecules and vaporized combustible molecules. The heat of pyrolysis of combustion molecules into cost-free radicals will minimize, plus the combustion reaction speed is going to be suppressed to a particular extent.

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