What is Aerosol fire extinguishing

What’s aerosol hearth extinguisher? Aerosol fireplace extinguishing technological innovation is a whole new form of hearth extinguishing technologies designed on The idea of military services pyrotechnics.

The primary technology of aerosol fire extinguishing technology was born within our state, also called smoke fire extinguishing know-how, which began from the early nineteen sixties. It absolutely was finished by scientific researchers from your Tianjin Fire Exploration Institute of Public Safety, who independently designed an automatic smoke fireplace extinguishing process, which is mainly used to extinguish fires in school A, B, and C liquid storage tanks.

In the early 1980s, Using the emergence of environmental defense problems of “halon fire extinguishing agent”, getting alternate options to halon turned a crucial investigation subject.

At the end of the nineteen eighties, Russian researchers initially succeeded in investigating aerosol fireplace extinguishing know-how which will extinguish fires inside of a submerged fashion, which opened up a fresh way for halon substitution investigation. Subsequently, aerosol fireplace extinguishing technologies has attracted the attention in the international community, and nations for example China, The us, Australia, Malaysia and also other nations have also started investigate on new aerosol fireplace extinguishing systems.

Generally speaking, aerosol can be a stable condition method fashioned by the dispersion of great stable or liquid particles in the gasoline. Professionally, it refers to a colloidal procedure that takes advantage of fuel (typically air) as the dispersion medium and solid or liquid particles given that the dispersant.Frequent aerosols in nature—clouds, smoke, fog, etcetera.The dimensions with the particles in aerosols is usually from the purchase of 10-5 to ten-1μm, that has gas fluidity and might diffuse all-around obstacles.

The medicament during the aerosol hearth suppression process product is sound, and the component emitted with the medicament with the oxidation-reduction response is aerosol. The initial era of aerosol hearth extinguishing technology-smoke fireplace extinguishing technologies.

K-style aerosol fire extinguisher, also called potassium salt fireplace extinguishing technology, is the 2nd phase of the development of aerosol fire extinguishing technologies, which started in the former Soviet Union within the mid-1960s. Our country started out late Within this regard, starting off within the early nineteen nineties.

In this kind of aerosol creating agent, potassium nitrate is principally utilised as the key oxidant. Its sprays have significant fire extinguishing performance, but simply because they include a great deal of potassium ions, Effortless to soak up dampness, forming a yellow and sticky sturdy alkaline conductive liquid film, this compound may be very damaging to electronic devices, so K-form aerosol computerized hearth extinguishing device can not be Utilized in electronic machines, precision devices and cultural relics Archive position. At this time, the use in the market is slowly decreasing.

The 3rd-technology aerosol (S type) is especially made of strontium salt as the main oxidant. As opposed to the next-technology potassium salt (K-sort) aerosol, strontium ions will not soak up humidity, don’t variety a conductive solution, and will not likely trigger damage to electrical gear. In 2001, China Cell Communications Company chosen the strontium salt aerosol (S-type aerosol automatic fireplace extinguishing product) produced by the organization soon after strict inspection and verification to shield its communication base stations and other locations Geared up with innovative Digital products.

At present, strontium salt aerosol goods are already applied in 1000s of engineering tasks, along with the third-generation aerosol has become Increasingly more acknowledged by users

Aerosol fire extinguisher software selection

a. Electrical hearth

Interaction place, conversation foundation station, electronic Computer system place, and many others.;

Electrical fires in places containing precision instruments and gear, which include power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, etc.

b. Strong surface area hearth

Area fireplace of combustible strong components in destinations in which combustible reliable elements are employed or stored.

c. Liquid fire

Liquid fires in destinations where diesel oil is produced, applied or saved (apart from -35 diesel), hefty oil, transformer oil, animal and vegetable oil along with other flammable liquids of Class C; In advance of extinguishing a fuel fire, the fuel supply is often Slash off.

Aerosol fire suppression procedure application .

d. The S-form aerosol fireplace extinguishing machine can not be used to place out the subsequent fires

①Substances that can be oxidized without the need of air, including nitrocellulose, gunpowder, and so on.; Energetic metals, for instance potassium, sodium, magnesium, titanium, and many others.; compounds that could decompose by by themselves, including sure peroxides, hydrazine, etcetera. Metal hydrides, such as potassium fluoride, sodium hydride, and many others. Organic substances, including phosphorus. Sturdy oxidants, such as nitrogen oxide, fluorine, etc.

② Deep fire of combustible strong components.

③ Fireplace in crowded areas, including theaters, auditoriums, and so forth.

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

⑤ Extremely-clear environment, for instance pharmaceutical workshops, chip processing areas, health care rooms, and so on.

Aerosol fire extinguishing Doing the job principle

The four things of combustion: combustibles, oxidizer, temperature and uninhibited chain reaction. The fire extinguishing mechanism of fire extinguishing fuel will be to remove one or various on the 4 features of combustion.

The sound hearth extinguishing agent from the S-variety aerosol fireplace extinguishing unit is begun by energy, and it undergoes redox response to form a large number of agglomerated hearth extinguishing aerosols, and its composition is especially N2, a little amount of CO2, and metal salt good particles.

Aerosol hearth extinguishing system is as follows

Mechanism of endothermic cooling and fire extinguishing

Metal salt particles soak up a large amount of heat at superior temperatures, and bear physical endothermic processes like thermal melting and gasification. The flame temperature is reduced and after that radiated to the combustible combustion floor for gasification of combustible molecules and vaporized combustible molecules. The heat of pyrolysis of combustion molecules into cost-free radicals will lessen, plus the combustion response velocity is going to be suppressed to a certain extent.

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