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Exactly what is Aerosol fire extinguishing

What is aerosol fire extinguisher? Aerosol hearth extinguishing technological innovation is a different variety of hearth extinguishing technologies formulated on the basis of navy pyrotechnics.

The main era of aerosol fire extinguishing know-how was born in our country, often called smoke hearth extinguishing know-how, which began inside the early nineteen sixties. It absolutely was completed by scientific researchers through the Tianjin Hearth Investigation Institute of Public Safety, who independently designed an automatic smoke fireplace extinguishing technique, which is mainly utilized to extinguish fires in school A, B, and C liquid storage tanks.

Within the early eighties, Together with the emergence of environmental security troubles of “halon hearth extinguishing agent”, locating possibilities to halon turned a vital study subject matter.

At the conclusion of the 1980s, Russian experts initial succeeded in studying aerosol fire extinguishing technologies that may extinguish fires within a submerged manner, which opened up a completely new way for halon substitution study. Subsequently, aerosol fireplace extinguishing technological innovation has attracted the eye in the Intercontinental Group, and nations around the world like China, the United States, Australia, Malaysia together with other nations around the world have also started study on new aerosol hearth extinguishing technologies.

Most of the time, aerosol is actually a stable condition technique fashioned through the dispersion of great solid or liquid particles in a very gas. Professionally, it refers into a colloidal technique that makes use of gas (commonly air) since the dispersion medium and solid or liquid particles because the dispersant.Common aerosols in nature—clouds, smoke, fog, and many others.The scale in the particles in aerosols is usually while in the order of ten-five to ten-1μm, which has gas fluidity and will diffuse around obstructions.

The medicament within the aerosol hearth suppression program gadget is good, as well as the ingredient emitted from the medicament with the oxidation-reduction reaction is aerosol. The 1st generation of aerosol hearth extinguishing engineering-smoke hearth extinguishing technological know-how.

K-style aerosol fire extinguisher, also referred to as potassium salt hearth extinguishing technology, is the next phase of the development of aerosol hearth extinguishing technology, which started in the previous Soviet Union during the mid-sixties. Our region begun late With this regard, beginning from the early 1990s.

In this sort of aerosol creating agent, potassium nitrate is mainly used as the primary oxidant. Its sprays have large hearth extinguishing efficiency, but as they include a great deal of potassium ions, Quick to absorb moisture, forming a yellow and sticky robust alkaline conductive liquid film, this compound is very harming to Digital machines, so K-variety aerosol computerized hearth extinguishing system can not be Employed in Digital machines, precision devices and cultural relics Archive position. At this time, the use in the market is progressively lowering.

The 3rd-era aerosol (S style) is mainly fabricated from strontium salt as the principle oxidant. As opposed to the 2nd-generation potassium salt (K-sort) aerosol, strontium ions usually do not absorb moisture, don’t variety a conductive Remedy, and will likely not cause harm to electrical tools. In 2001, China Mobile Communications Company picked the strontium salt aerosol (S-sort aerosol computerized fireplace extinguishing unit) produced by the corporation soon after rigorous inspection and verification to safeguard its conversation foundation stations and other sites Outfitted with refined Digital gear.

At present, strontium salt aerosol goods are used in Many engineering initiatives, plus the 3rd-generation aerosol is now A growing number of acknowledged by people

Aerosol hearth extinguisher application assortment

a. Electrical fireplace

Interaction space, interaction foundation station, electronic Laptop or computer place, and so on.;

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

b. Strong surface fire

Surface fire of combustible sound elements in sites wherever combustible solid resources are applied or stored.

c. Liquid fire

Liquid fires in sites wherever diesel oil is developed, utilized or saved (besides -35 diesel), weighty oil, transformer oil, animal and vegetable oil along with other flammable liquids of Category C; Right before extinguishing a fuel fire, the gasoline supply can be Slash off.

Aerosol fire suppression technique application .

d. The S-sort aerosol fire extinguishing machine can’t be used to set out the following fires

①Substances which can be oxidized with no air, like nitrocellulose, gunpowder, etcetera.; active metals, which include potassium, sodium, magnesium, titanium, etc.; compounds that may decompose by themselves, including sure peroxides, hydrazine, etcetera. Metal hydrides, such as potassium fluoride, sodium hydride, etcetera. Natural substances, for instance phosphorus. Potent oxidants, which include nitrogen oxide, fluorine, and so on.

② Deep hearth of combustible stable components.

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

④ Hearth in destinations with explosion hazard, including workshops with explosive dust.

⑤ Ultra-clear environment, including pharmaceutical workshops, chip processing areas, clinical rooms, and so on.

Aerosol fireplace extinguishing Functioning basic principle

The 4 components of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The fireplace extinguishing system of fireplace extinguishing gasoline is to remove just one or a number of of your four components of combustion.

The solid hearth extinguishing agent in the S-sort aerosol hearth extinguishing device is started by electrical power, and it undergoes redox response to form a large number of agglomerated fire extinguishing aerosols, and its composition is mainly N2, a small degree of CO2, and metal salt reliable particles.

Aerosol hearth extinguishing system is as follows

Mechanism of endothermic cooling and fireplace extinguishing

Steel salt particles take up a great deal of heat at large temperatures, and undertake Bodily endothermic procedures such as thermal melting and gasification. The flame temperature is lowered then radiated into the combustible combustion surface area for gasification of combustible molecules and vaporized combustible molecules. The warmth of pyrolysis of combustion molecules into free of charge radicals will minimize, as well as combustion reaction velocity will likely be suppressed to a certain extent.

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