Precisely what is Aerosol fire extinguishing

What is aerosol fire extinguisher? Aerosol fireplace extinguishing technological innovation is a new variety of hearth extinguishing engineering created on The idea of army pyrotechnics.

The main technology of aerosol fireplace extinguishing engineering was born within our country, also referred to as smoke fire extinguishing technology, which started inside the early sixties. It had been done by scientific researchers within the Tianjin Hearth Research Institute of General public Protection, who independently created an automatic smoke fire extinguishing technique, which is mainly used to extinguish fires in school A, B, and C liquid storage tanks.

Within the early 1980s, Together with the emergence of environmental safety challenges of “halon hearth extinguishing agent”, obtaining possibilities to halon turned a significant investigation matter.

At the end of the eighties, Russian researchers first succeeded in looking into aerosol fire extinguishing technological innovation which will extinguish fires within a submerged way, which opened up a new way for halon substitution research. Subsequently, aerosol fireplace extinguishing technological know-how has attracted the eye of the Worldwide community, and international locations which include China, The us, Australia, Malaysia and other nations around the world have also begun exploration on new aerosol hearth extinguishing systems.

Most of the time, aerosol is often a secure point out system fashioned because of the dispersion of great strong or liquid particles inside a fuel. Skillfully, it refers into a colloidal process that utilizes fuel (ordinarily air) as the dispersion medium and solid or liquid particles because the dispersant.Common aerosols in nature—clouds, smoke, fog, and many others.The size in the particles in aerosols is mostly in the get of ten-five to 10-1μm, which has gas fluidity and might diffuse around obstructions.

The medicament while in the aerosol fire suppression procedure gadget is stable, as well as the component emitted because of the medicament throughout the oxidation-reduction response is aerosol. The primary technology of aerosol fireplace extinguishing engineering-smoke hearth extinguishing engineering.

K-sort aerosol hearth extinguisher, also called potassium salt hearth extinguishing technology, is the 2nd stage of the development of aerosol fire extinguishing technological innovation, which began in the former Soviet Union during the mid-nineteen sixties. Our country began late During this regard, beginning within the early 1990s.

In this type of aerosol producing agent, potassium nitrate is principally applied as the key oxidant. Its sprays have superior hearth extinguishing effectiveness, but given that they include a large amount of potassium ions, Straightforward to soak up moisture, forming a yellow and sticky solid alkaline conductive liquid movie, this compound is rather damaging to electronic devices, so K-type aerosol automatic fireplace extinguishing unit can not be Employed in Digital machines, precision devices and cultural relics Archive place. At present, the use out there is gradually lowering.

The 3rd-technology aerosol (S type) is especially made of strontium salt as the main oxidant. Compared with the 2nd-era potassium salt (K-style) aerosol, strontium ions will not soak up humidity, never form a conductive Option, and will likely not result in damage to electrical gear. In 2001, China Mobile Communications Company picked the strontium salt aerosol (S-type aerosol automatic hearth extinguishing device) produced by the corporate right after rigorous inspection and verification to safeguard its conversation foundation stations along with other spots equipped with subtle Digital tools.

At the moment, strontium salt aerosol solutions have been utilized in Many engineering projects, plus the 3rd-technology aerosol happens to be Increasingly more acknowledged by end users

Aerosol hearth extinguisher application array

a. Electrical fireplace

Interaction home, interaction foundation station, electronic Laptop room, and so on.;

Electrical fires in locations made up of precision devices and devices, such as electrical power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and so on.

b. Reliable surface fire

Surface area fireplace of combustible strong elements in areas exactly where combustible stable components are applied or saved.

c. Liquid hearth

Liquid fires in spots where by diesel oil is manufactured, employed or stored (except -35 diesel), heavy oil, transformer oil, animal and vegetable oil and other flammable liquids of Category C; Prior to extinguishing a gas hearth, the gasoline supply may be Reduce off.

Aerosol hearth suppression program software .

d. The S-kind aerosol fireplace extinguishing device can not be used to set out the subsequent fires

①Substances that could be oxidized with out air, like nitrocellulose, gunpowder, and so on.; Energetic metals, which include potassium, sodium, magnesium, titanium, and many others.; compounds that could decompose by them selves, for instance selected peroxides, hydrazine, etc. Steel hydrides, for example potassium fluoride, sodium hydride, and so on. Pure substances, which include phosphorus. Solid oxidants, for example nitrogen oxide, fluorine, and so forth.

② Deep hearth of combustible strong components.

③ Fireplace in crowded destinations, for example theaters, auditoriums, and so on.

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

⑤ Extremely-cleanse setting, for instance pharmaceutical workshops, chip processing spots, health care rooms, etc.

Aerosol fire extinguishing Performing principle

The four components of combustion: combustibles, oxidizer, temperature and uninhibited chain reaction. The fireplace extinguishing system of fire extinguishing gasoline is to do away with a person or many of your 4 things of combustion.

The reliable fire extinguishing agent from the S-style aerosol hearth extinguishing system is started out by electrical power, and it undergoes redox response to form numerous agglomerated hearth extinguishing aerosols, and its composition is principally N2, a small amount of CO2, and metallic salt strong particles.

Aerosol fire extinguishing mechanism is as follows

System of endothermic cooling and fire extinguishing

Steel salt particles take up a great deal of heat at higher temperatures, and go through Bodily endothermic processes including thermal melting and gasification. The flame temperature is decreased and afterwards radiated towards the combustible combustion surface for gasification of combustible molecules and vaporized combustible molecules. The heat of pyrolysis of combustion molecules into no cost radicals will minimize, along with the combustion reaction velocity will probably be suppressed to a certain extent.

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