What is Aerosol fireplace extinguishing
What on earth is aerosol hearth extinguisher? Aerosol fireplace extinguishing know-how is a new kind of fireplace extinguishing technologies produced on The premise of army pyrotechnics.
The very first generation of aerosol hearth extinguishing technology was born within our region, also known as smoke hearth extinguishing technologies, which commenced inside the early sixties. It absolutely was done by scientific scientists through the Tianjin Hearth Analysis Institute of Community Stability, who independently produced an automated smoke hearth extinguishing technique, which is especially used to extinguish fires in school A, B, and C liquid storage tanks.
From the early nineteen eighties, Along with the emergence of environmental defense troubles of “halon fire extinguishing agent”, finding options to halon became a crucial study matter.
At the conclusion of the nineteen eighties, Russian researchers initial succeeded in researching aerosol fire extinguishing technological know-how that will extinguish fires inside a submerged manner, which opened up a new way for halon substitution research. Subsequently, aerosol hearth extinguishing engineering has attracted the attention of your Intercontinental community, and nations around the world for instance China, The usa, Australia, Malaysia and other nations around the world have also begun investigate on new aerosol hearth extinguishing technologies.
In most cases, aerosol can be a stable condition method shaped with the dispersion of wonderful strong or liquid particles in a very gasoline. Professionally, it refers into a colloidal program that employs gas (commonly air) because the dispersion medium and stable or liquid particles since the dispersant.Typical aerosols in mother nature—clouds, smoke, fog, etcetera.The dimensions from the particles in aerosols is generally within the purchase of ten-five to ten-1μm, that has fuel fluidity and will diffuse all around obstacles.
The medicament during the aerosol fireplace suppression method unit is sound, plus the part emitted by the medicament through the oxidation-reduction response is aerosol. The main era of aerosol hearth extinguishing know-how-smoke fire extinguishing technological know-how.
K-variety aerosol hearth extinguisher, also called potassium salt fire extinguishing technology, is the second stage of the development of aerosol hearth extinguishing technologies, which started in the former Soviet Union within the mid-nineteen sixties. Our nation started off late in this regard, setting up during the early nineties.
In this kind of aerosol producing agent, potassium nitrate is mainly made use of as the main oxidant. Its sprays have high fireplace extinguishing effectiveness, but simply because they comprise a great deal of potassium ions, Uncomplicated to absorb humidity, forming a yellow and sticky strong alkaline conductive liquid movie, this compound is very damaging to Digital tools, so K-type aerosol automatic fireplace extinguishing system can not be used in electronic machines, precision instruments and cultural relics Archive location. At this time, the use in the market is little by little decreasing.
The 3rd-generation aerosol (S variety) is especially made of strontium salt as the main oxidant. Not like the 2nd-generation potassium salt (K-kind) aerosol, strontium ions tend not to take in dampness, usually do not type a conductive Resolution, and will not likely result in harm to electrical equipment. In 2001, China Cell Communications Corporation chosen the strontium salt aerosol (S-style aerosol computerized fireplace extinguishing machine) produced by the corporation after stringent inspection and verification to protect its conversation base stations and other sites Geared up with sophisticated Digital equipment.
At present, strontium salt aerosol products are already utilized in 1000s of engineering assignments, as well as the 3rd-era aerosol happens to be Increasingly more acknowledged by users
Aerosol hearth extinguisher application range
a. Electrical fire
Interaction home, communication foundation station, Digital Pc space, and many others.;
Electrical fires in areas containing precision devices and machines, like electricity distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, etcetera.
b. Reliable floor fire
Surface area hearth of combustible sound elements in areas the place combustible reliable products are applied or saved.
c. Liquid fire
Liquid fires in places in which diesel oil is produced, made use of or saved (other than -35 diesel), large oil, transformer oil, animal and vegetable oil together with other flammable liquids of Group C; Prior to extinguishing a fuel fireplace, the gasoline source may be Slice off.
Aerosol fireplace suppression system software .
d. The S-kind aerosol fireplace extinguishing machine cannot be utilized to set out the next fires
①Substances which can be oxidized without air, which include nitrocellulose, gunpowder, and so on.; active metals, including potassium, sodium, magnesium, titanium, and so forth.; compounds that can decompose by them selves, for instance sure peroxides, hydrazine, and so on. Steel hydrides, including potassium fluoride, sodium hydride, and many others. Pure substances, for example phosphorus. Potent oxidants, such as nitrogen oxide, fluorine, etcetera.
② Deep hearth of combustible good supplies.
③ Fireplace in crowded places, which include theaters, auditoriums, and many others.
④ Fire in destinations with explosion hazard, for example workshops with explosive dust.
⑤ Extremely-cleanse atmosphere, which include pharmaceutical workshops, chip processing sites, clinical rooms, and so on.
Aerosol hearth extinguishing Performing basic principle
The four components of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The fire extinguishing mechanism of hearth extinguishing gasoline should be to remove a single or various from the four factors of combustion.
The stable hearth extinguishing agent inside the S-kind aerosol fire extinguishing device is commenced by electric power, and it undergoes redox response to kind a large number of agglomerated fireplace extinguishing aerosols, and its composition is principally N2, a little amount of CO2, and metal salt reliable particles.
Aerosol fire extinguishing system is as follows
Mechanism of endothermic cooling and fire extinguishing
Metal salt particles take in a great deal of heat at significant temperatures, and bear physical endothermic procedures including thermal melting and gasification. The flame temperature is reduced and afterwards radiated to your combustible combustion surface area for gasification of combustible molecules and vaporized combustible molecules. The warmth of pyrolysis of combustion molecules into no cost radicals will decrease, along with the combustion response speed might be suppressed to a certain extent.
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