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What is Aerosol fire extinguishing

What on earth is aerosol hearth extinguisher? Aerosol fire extinguishing technologies is a fresh form of fireplace extinguishing technologies created on The premise of military pyrotechnics.

The first generation of aerosol fireplace extinguishing technologies was born in our nation, also referred to as smoke fireplace extinguishing know-how, which commenced within the early nineteen sixties. It absolutely was accomplished by scientific researchers from the Tianjin Hearth Analysis Institute of Community Security, who independently produced an automatic smoke fireplace extinguishing technique, which is especially accustomed to extinguish fires at school A, B, and C liquid storage tanks.

Inside the early 1980s, With all the emergence of environmental security issues of “halon hearth extinguishing agent”, locating options to halon grew to become a vital analysis topic.

At the conclusion of the 1980s, Russian experts to start with succeeded in investigating aerosol fireplace extinguishing technological innovation that may extinguish fires within a submerged way, which opened up a different way for halon substitution research. Subsequently, aerosol fireplace extinguishing engineering has attracted the eye of the Worldwide Neighborhood, and international locations for example China, America, Australia, Malaysia as well as other nations around the world have also begun research on new aerosol hearth extinguishing systems.

Generally speaking, aerosol is a steady state process shaped by the dispersion of wonderful reliable or liquid particles within a gas. Professionally, it refers to a colloidal program that employs gas (commonly air) since the dispersion medium and reliable or liquid particles given that the dispersant.Common aerosols in mother nature—clouds, smoke, fog, etc.The size of your particles in aerosols is mostly in the order of ten-five to 10-oneμm, that has fuel fluidity and can diffuse all around obstacles.

The medicament in the aerosol fireplace suppression system device is reliable, along with the ingredient emitted with the medicament in the oxidation-reduction reaction is aerosol. The main era of aerosol fireplace extinguishing technology-smoke fireplace extinguishing engineering.

K-type aerosol hearth extinguisher, also referred to as potassium salt fire extinguishing technologies, is the second phase of the event of aerosol fire extinguishing engineering, which commenced in the former Soviet Union in the mid-sixties. Our region started out late in this regard, setting up during the early 1990s.

In this sort of aerosol making agent, potassium nitrate is principally employed as the primary oxidant. Its sprays have significant fireplace extinguishing performance, but mainly because they have a large amount of potassium ions, Uncomplicated to absorb dampness, forming a yellow and sticky powerful alkaline conductive liquid film, this material is quite harmful to Digital tools, so K-sort aerosol automated hearth extinguishing unit cannot be Utilized in Digital products, precision devices and cultural relics Archive area. At present, the use out there is progressively lowering.

The third-generation aerosol (S form) is mainly made of strontium salt as the key oxidant. As opposed to the next-generation potassium salt (K-type) aerosol, strontium ions tend not to soak up moisture, never sort a conductive solution, and won’t bring about damage to electrical equipment. In 2001, China Cell Communications Company picked the strontium salt aerosol (S-form aerosol automated fire extinguishing machine) made by the company just after strict inspection and verification to guard its conversation foundation stations along with other locations equipped with advanced electronic products.

At the moment, strontium salt aerosol products happen to be applied in A large number of engineering initiatives, and also the third-technology aerosol is becoming An increasing number of acknowledged by consumers

Aerosol fire extinguisher software variety

a. Electrical fireplace

Interaction home, conversation foundation station, Digital Personal computer space, and so on.;

Electrical fires in places containing precision devices and machines, for example electric power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, etcetera.

b. Reliable area fire

Surface area fireplace of combustible stable components in destinations wherever combustible strong materials are utilised or stored.

c. Liquid hearth

Liquid fires in places in which diesel oil is created, made use of or stored (except -35 diesel), heavy oil, transformer oil, animal and vegetable oil and other flammable liquids of Class C; In advance of extinguishing a fuel hearth, the gas source may be Slash off.

Aerosol fireplace suppression procedure application .

d. The S-type aerosol hearth extinguishing gadget can not be used to set out the subsequent fires

①Substances that can be oxidized without air, for example nitrocellulose, gunpowder, and so on.; Energetic metals, including potassium, sodium, magnesium, titanium, and many others.; compounds that may decompose by by themselves, such as particular peroxides, hydrazine, and so on. Metallic hydrides, for example potassium fluoride, sodium hydride, and so forth. All-natural substances, like phosphorus. Potent oxidants, for example nitrogen oxide, fluorine, and so forth.

② Deep fireplace of combustible stable elements.

③ Hearth in crowded destinations, such as theaters, auditoriums, etcetera.

④ Fire in spots with explosion hazard, such as workshops with explosive dust.

⑤ Ultra-cleanse setting, like pharmaceutical workshops, chip processing areas, medical rooms, and so forth.

Aerosol fire extinguishing Doing the job principle

The four aspects of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The fireplace extinguishing mechanism of hearth extinguishing gasoline should be to get rid of just one or various on the four components of combustion.

The good fire extinguishing agent within the S-type aerosol fire extinguishing product is started off by electrical power, and it undergoes redox response to variety a large number of agglomerated hearth extinguishing aerosols, and its composition is mainly N2, a small number of CO2, and steel salt good particles.

Aerosol fire extinguishing system is as follows

Mechanism of endothermic cooling and fire extinguishing

Metal salt particles take up a large amount of warmth at superior temperatures, and undergo Bodily endothermic procedures including thermal melting and gasification. The flame temperature is reduced and then radiated on the combustible combustion surface area for gasification of combustible molecules and vaporized combustible molecules. The warmth of pyrolysis of combustion molecules into cost-free radicals will decrease, and also the combustion reaction speed might be suppressed to a specific extent.

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