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Precisely what is Aerosol hearth extinguishing

Precisely what is aerosol fire extinguisher? Aerosol hearth extinguishing technological innovation is a brand new sort of hearth extinguishing know-how made on The idea of army pyrotechnics.

The very first technology of aerosol fireplace extinguishing know-how was born within our country, often known as smoke fireplace extinguishing know-how, which began in the early nineteen sixties. It was accomplished by scientific researchers from the Tianjin Hearth Exploration Institute of General public Safety, who independently produced an computerized smoke fireplace extinguishing technique, which is principally used to extinguish fires in Class A, B, and C liquid storage tanks.

From the early 1980s, Together with the emergence of environmental security troubles of “halon fireplace extinguishing agent”, obtaining choices to halon grew to become an important study subject matter.

At the end of the nineteen eighties, Russian experts very first succeeded in exploring aerosol hearth extinguishing technological innovation that can extinguish fires inside a submerged method, which opened up a different way for halon substitution investigation. Subsequently, aerosol fireplace extinguishing technological know-how has attracted the eye in the international community, and nations around the world which include China, the United States, Australia, Malaysia along with other nations have also begun investigation on new aerosol fireplace extinguishing systems.

In most cases, aerosol is actually a secure point out technique fashioned through the dispersion of high-quality solid or liquid particles in a very fuel. Professionally, it refers to your colloidal system that makes use of gas (commonly air) as the dispersion medium and solid or liquid particles as being the dispersant.Prevalent aerosols in nature—clouds, smoke, fog, etcetera.The size of your particles in aerosols is usually while in the get of ten-five to ten-1μm, that has gasoline fluidity and can diffuse all around road blocks.

The medicament within the aerosol fire suppression process product is solid, and also the component emitted via the medicament through the oxidation-reduction reaction is aerosol. The 1st generation of aerosol hearth extinguishing technologies-smoke fireplace extinguishing technological innovation.

K-variety aerosol hearth extinguisher, also called potassium salt fireplace extinguishing technological innovation, is the next stage of the event of aerosol fire extinguishing technological innovation, which commenced in the previous Soviet Union in the mid-sixties. Our country commenced late in this regard, setting up in the early nineteen nineties.

In such a aerosol producing agent, potassium nitrate is especially made use of as the principle oxidant. Its sprays have large fireplace extinguishing performance, but simply because they have a great deal of potassium ions, Straightforward to absorb dampness, forming a yellow and sticky strong alkaline conductive liquid film, this material is rather harming to Digital products, so K-form aerosol automatic fireplace extinguishing machine can not be Utilized in electronic products, precision devices and cultural relics Archive spot. At the moment, the use available in the market is slowly reducing.

The third-generation aerosol (S variety) is especially made from strontium salt as the principle oxidant. In contrast to the second-generation potassium salt (K-type) aerosol, strontium ions tend not to soak up moisture, will not kind a conductive Answer, and is not going to lead to harm to electrical gear. In 2001, China Cell Communications Company picked the strontium salt aerosol (S-variety aerosol automated fire extinguishing system) made by the organization immediately after stringent inspection and verification to protect its interaction foundation stations along with other sites equipped with advanced electronic devices.

At the moment, strontium salt aerosol solutions happen to be applied in Countless engineering initiatives, and the 3rd-generation aerosol happens to be more and more acknowledged by end users

Aerosol fire extinguisher software assortment

a. Electrical fireplace

Conversation home, interaction base station, Digital Laptop place, and so on.;

Electrical fires in places made up of precision devices and tools, for example electric power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and so on.

b. Reliable surface area fire

Floor fire of combustible solid elements in spots exactly where combustible stable resources are made use of or saved.

c. Liquid fireplace

Liquid fires in destinations exactly where diesel oil is produced, employed or stored (except -35 diesel), weighty oil, transformer oil, animal and vegetable oil along with other flammable liquids of Group C; Before extinguishing a gas fire, the fuel resource might be Slash off.

Aerosol fireplace suppression technique application .

d. The S-sort aerosol hearth extinguishing system cannot be utilized to place out the following fires

①Substances which might be oxidized without the need of air, such as nitrocellulose, gunpowder, and many others.; Energetic metals, like potassium, sodium, magnesium, titanium, etc.; compounds which can decompose by on their own, such as selected peroxides, hydrazine, and so on. Metallic hydrides, like potassium fluoride, sodium hydride, and many others. Natural substances, such as phosphorus. Sturdy oxidants, like nitrogen oxide, fluorine, and many others.

② Deep fire of combustible good resources.

③ Fire in crowded places, which include theaters, auditoriums, etcetera.

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

⑤ Ultra-cleanse surroundings, which include pharmaceutical workshops, chip processing destinations, professional medical rooms, and many others.

Aerosol hearth extinguishing Operating basic principle

The four things of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The hearth extinguishing system of fireplace extinguishing gasoline is to eliminate one particular or various of your four features of combustion.

The good hearth extinguishing agent during the S-form aerosol fire extinguishing gadget is begun by electrical power, and it undergoes redox response to sort a lot of agglomerated fireplace extinguishing aerosols, and its composition is mainly N2, a little volume of CO2, and metallic salt strong particles.

Aerosol hearth extinguishing mechanism is as follows

Mechanism of endothermic cooling and hearth extinguishing

Steel salt particles take in a great deal of warmth at higher temperatures, and bear physical endothermic procedures including thermal melting and gasification. The flame temperature is reduced then radiated to the combustible combustion surface for gasification of combustible molecules and vaporized combustible molecules. The warmth of pyrolysis of combustion molecules into cost-free radicals will lessen, as well as the combustion response pace will likely be suppressed to a specific extent.

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