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What is Aerosol fire extinguishing

What is aerosol hearth extinguisher? Aerosol fireplace extinguishing engineering is a whole new variety of fireplace extinguishing engineering developed on the basis of military services pyrotechnics.

The first generation of aerosol fireplace extinguishing know-how was born inside our region, also referred to as smoke fire extinguishing technologies, which started in the early nineteen sixties. It had been done by scientific researchers in the Tianjin Fireplace Investigate Institute of General public Stability, who independently developed an automated smoke hearth extinguishing system, which is especially utilized to extinguish fires in Class A, B, and C liquid storage tanks.

In the early 1980s, Using the emergence of environmental defense complications of “halon fire extinguishing agent”, discovering options to halon turned an important exploration matter.

At the conclusion of the 1980s, Russian scientists to start with succeeded in looking into aerosol fireplace extinguishing know-how that will extinguish fires in a submerged way, which opened up a fresh way for halon substitution analysis. Subsequently, aerosol hearth extinguishing engineering has captivated the eye of your Global Group, and countries such as China, the United States, Australia, Malaysia along with other international locations have also started investigation on new aerosol fireplace extinguishing systems.

Most of the time, aerosol is a stable point out method formed from the dispersion of high-quality stable or liquid particles in a very fuel. Professionally, it refers to some colloidal technique that uses gas (typically air) as the dispersion medium and solid or liquid particles as being the dispersant.Common aerosols in mother nature—clouds, smoke, fog, etc.The size from the particles in aerosols is usually during the get of 10-5 to ten-oneμm, that has gasoline fluidity and may diffuse all over hurdles.

The medicament inside the aerosol fire suppression system machine is stable, and the component emitted via the medicament from the oxidation-reduction response is aerosol. The main generation of aerosol hearth extinguishing technology-smoke hearth extinguishing technological innovation.

K-style aerosol fireplace extinguisher, also called potassium salt hearth extinguishing technological know-how, is the second phase of the development of aerosol fire extinguishing technological innovation, which started in the previous Soviet Union during the mid-nineteen sixties. Our place started out late With this regard, commencing within the early nineties.

In this sort of aerosol making agent, potassium nitrate is especially applied as the leading oxidant. Its sprays have substantial fire extinguishing efficiency, but as they include a large amount of potassium ions, Uncomplicated to absorb dampness, forming a yellow and sticky powerful alkaline conductive liquid film, this material is incredibly harming to Digital tools, so K-kind aerosol computerized fireplace extinguishing machine cannot be Employed in Digital products, precision devices and cultural relics Archive location. At this time, the use on the market is progressively reducing.

The 3rd-generation aerosol (S variety) is mainly made of strontium salt as the key oxidant. Unlike the second-technology potassium salt (K-type) aerosol, strontium ions never take in humidity, tend not to form a conductive solution, and will not likely induce harm to electrical machines. In 2001, China Mobile Communications Company selected the strontium salt aerosol (S-kind aerosol automated fireplace extinguishing unit) made by the company immediately after rigid inspection and verification to protect its interaction base stations and other destinations equipped with sophisticated Digital tools.

At the moment, strontium salt aerosol goods are used in Many engineering jobs, as well as third-era aerosol has grown to be An increasing number of accepted by consumers

Aerosol fireplace extinguisher application selection

a. Electrical hearth

Communication place, communication foundation station, Digital Laptop home, and so on.;

Electrical fires in locations containing precision devices and products, for instance electric power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and many others.

b. Strong floor fire

Area hearth of combustible stable materials in destinations wherever combustible reliable supplies are employed or stored.

c. Liquid fireplace

Liquid fires in sites where by diesel oil is developed, used or stored (apart from -35 diesel), hefty oil, transformer oil, animal and vegetable oil along with other flammable liquids of Class C; Just before extinguishing a fuel fire, the gas source can be Reduce off.

Aerosol fireplace suppression program software .

d. The S-style aerosol hearth extinguishing machine can not be utilized to put out the subsequent fires

①Substances that could be oxidized without having air, such as nitrocellulose, gunpowder, etc.; active metals, including potassium, sodium, magnesium, titanium, and so forth.; compounds that can decompose by on their own, for instance certain peroxides, hydrazine, and many others. Steel hydrides, such as potassium fluoride, sodium hydride, and many others. Purely natural substances, including phosphorus. Strong oxidants, for instance nitrogen oxide, fluorine, and so forth.

② Deep fireplace of combustible strong components.

③ Hearth in crowded destinations, which include theaters, auditoriums, etcetera.

④ Hearth in places with explosion hazard, for instance workshops with explosive dust.

⑤ Extremely-cleanse ecosystem, such as pharmaceutical workshops, chip processing locations, healthcare rooms, and so on.

Aerosol fireplace extinguishing Operating principle

The 4 elements of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The fireplace extinguishing system of hearth extinguishing fuel should be to get rid of a person or various in the four components of combustion.

The good fireplace extinguishing agent from the S-type aerosol hearth extinguishing unit is started by electrical power, and it undergoes redox response to sort numerous agglomerated fire extinguishing aerosols, and its composition is especially N2, a little level of CO2, and metallic salt stable particles.

Aerosol fireplace extinguishing mechanism is as follows

Mechanism of endothermic cooling and hearth extinguishing

Steel salt particles absorb a large amount of heat at higher temperatures, and endure physical endothermic processes like thermal melting and gasification. The flame temperature is reduced and then radiated into the combustible combustion area for gasification of combustible molecules and vaporized combustible molecules. The heat of pyrolysis of combustion molecules into absolutely free radicals will decrease, as well as combustion response velocity will probably be suppressed to a particular extent.

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