Precisely what is Aerosol fire extinguishing
What is aerosol fire extinguisher? Aerosol hearth extinguishing know-how is a different form of hearth extinguishing engineering made on The premise of navy pyrotechnics.
The 1st era of aerosol fire extinguishing technological innovation was born within our nation, also referred to as smoke fireplace extinguishing technologies, which started during the early nineteen sixties. It was concluded by scientific scientists with the Tianjin Fire Analysis Institute of General public Stability, who independently formulated an automated smoke fireplace extinguishing method, which is mainly used to extinguish fires in Class A, B, and C liquid storage tanks.
In the early nineteen eighties, While using the emergence of environmental protection difficulties of “halon hearth extinguishing agent”, discovering possibilities to halon turned a vital analysis topic.
At the end of the eighties, Russian researchers initial succeeded in looking into aerosol hearth extinguishing technological know-how that will extinguish fires inside of a submerged method, which opened up a different way for halon substitution research. Subsequently, aerosol hearth extinguishing know-how has captivated the eye from the Intercontinental community, and nations around the world for instance China, America, Australia, Malaysia and various nations around the world have also started investigation on new aerosol hearth extinguishing technologies.
Most of the time, aerosol can be a secure condition system formed via the dispersion of good reliable or liquid particles in a very gas. Skillfully, it refers to your colloidal method that uses gasoline (ordinarily air) as the dispersion medium and strong or liquid particles given that the dispersant.Popular aerosols in character—clouds, smoke, fog, etcetera.The scale from the particles in aerosols is generally within the buy of 10-five to 10-oneμm, that has fuel fluidity and may diffuse close to road blocks.
The medicament from the aerosol fire suppression process machine is solid, plus the part emitted by the medicament throughout the oxidation-reduction reaction is aerosol. The very first technology of aerosol hearth extinguishing technologies-smoke hearth extinguishing technological know-how.
K-kind aerosol hearth extinguisher, also called potassium salt fireplace extinguishing technological innovation, is the next stage of the event of aerosol hearth extinguishing technology, which started in the former Soviet Union during the mid-nineteen sixties. Our state started out late With this regard, starting up in the early 1990s.
In this sort of aerosol creating agent, potassium nitrate is mainly used as the primary oxidant. Its sprays have significant fire extinguishing effectiveness, but as they comprise a great deal of potassium ions, Quick to soak up dampness, forming a yellow and sticky robust alkaline conductive liquid movie, this compound may be very damaging to electronic products, so K-style aerosol automated fireplace extinguishing device can't be Employed in electronic tools, precision devices and cultural relics Archive area. At present, the use in the market is little by little reducing.
The third-era aerosol (S variety) is mainly fabricated from strontium salt as the leading oxidant. Unlike the second-era potassium salt (K-type) aerosol, strontium ions tend not to take in dampness, do not kind a conductive Remedy, and will never bring about harm to electrical devices. In 2001, China Cell Communications Corporation chosen the strontium salt aerosol (S-sort aerosol computerized fire extinguishing device) produced by the business soon after strict inspection and verification to shield its communication base stations together with other sites equipped with sophisticated Digital equipment.
At the moment, strontium salt aerosol products have been applied in A large number of engineering projects, plus the 3rd-era aerosol has grown to be A growing number of approved by buyers
Aerosol fireplace extinguisher software vary
a. Electrical fire
Conversation space, interaction foundation station, electronic Computer system area, and so forth.;
Electrical fires in destinations that contains precision devices and products, including electrical power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, etc.
b. Reliable area hearth
Area fire of combustible sound supplies in areas exactly where combustible reliable supplies are employed or stored.
c. Liquid hearth
Liquid fires in places the place diesel oil is produced, made use of or stored (besides -35 diesel), heavy oil, transformer oil, animal and vegetable oil and also other flammable liquids of Group C; Prior to extinguishing a gas hearth, the fuel resource can be Minimize off.
Aerosol fire suppression technique software .
d. The S-type aerosol fireplace extinguishing unit cannot be utilized to place out the next fires
①Substances that could be oxidized with no air, which include nitrocellulose, gunpowder, and many others.; Energetic metals, for example potassium, sodium, magnesium, titanium, and so forth.; compounds which will decompose by by themselves, such as selected peroxides, hydrazine, etc. Metallic hydrides, like potassium fluoride, sodium hydride, and many others. Natural substances, like phosphorus. Robust oxidants, which include nitrogen oxide, fluorine, etcetera.
② Deep fireplace of combustible good products.
③ Hearth in crowded spots, like theaters, auditoriums, and so forth.
④ Hearth in spots with explosion hazard, including workshops with explosive dust.
⑤ Extremely-clean surroundings, including pharmaceutical workshops, chip processing destinations, health-related rooms, etc.
Aerosol fire extinguishing Operating basic principle
The 4 features of combustion: combustibles, oxidizer, temperature and uninhibited chain reaction. The hearth extinguishing mechanism of fireplace extinguishing fuel will be to eradicate 1 or several on the 4 components of combustion.
The strong fire extinguishing agent inside the S-variety aerosol fire extinguishing unit is begun by energy, and it undergoes redox response to type numerous agglomerated hearth extinguishing aerosols, and its composition is principally N2, a little number of CO2, and metallic salt strong 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 large temperatures, and bear Actual physical endothermic processes which include thermal melting and gasification. The flame temperature is reduced after which radiated for the combustible combustion surface for gasification of combustible molecules and vaporized combustible molecules. The warmth of pyrolysis of combustion molecules into absolutely free radicals will lower, and the combustion response pace is going to be suppressed to a particular extent.
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