Points You Have To Learn About Aerosol Fire Extinguishing
What's Aerosol fireplace extinguishing
What exactly is aerosol fireplace extinguisher? Aerosol fireplace extinguishing technology is a new type of fire extinguishing technological innovation designed on the basis of army pyrotechnics.
The very first era of aerosol hearth extinguishing know-how was born inside our region, also called smoke fireplace extinguishing technological know-how, which began inside the early sixties. It was accomplished by scientific researchers in the Tianjin Fire Study Institute of Community Stability, who independently formulated an computerized smoke hearth extinguishing technique, which is mainly accustomed to extinguish fires in school A, B, and C liquid storage tanks.
In the early nineteen eighties, Along with the emergence of environmental defense issues of “halon fire extinguishing agent”, obtaining alternatives to halon grew to become a vital investigation matter.
At the end of the 1980s, Russian researchers first succeeded in studying aerosol hearth extinguishing engineering which will extinguish fires in a very submerged way, which opened up a fresh way for halon substitution analysis. Subsequently, aerosol fireplace extinguishing technology has captivated the eye on the international Neighborhood, and international locations like China, the United States, Australia, Malaysia together with other nations have also begun exploration on new aerosol hearth extinguishing systems.
In most cases, aerosol is really a secure condition system shaped by the dispersion of fantastic strong or liquid particles inside of a fuel. Skillfully, it refers into a colloidal procedure that utilizes gasoline (typically air) given that the dispersion medium and strong or liquid particles because the dispersant.Typical aerosols in character—clouds, smoke, fog, etcetera.The size from the particles in aerosols is usually while in the get of 10-5 to 10-oneμm, which has fuel fluidity and can diffuse around hurdles.
The medicament during the aerosol fire suppression system system is good, plus the part emitted from the medicament with the oxidation-reduction reaction is aerosol. The first technology of aerosol fire extinguishing know-how-smoke fire extinguishing technological know-how.
K-type aerosol fire extinguisher, also known as potassium salt fire extinguishing technology, is the next stage of the development of aerosol hearth extinguishing know-how, which commenced in the previous Soviet Union in the mid-sixties. Our region started off late in this regard, commencing while in the early nineteen nineties.
In this type of aerosol producing agent, potassium nitrate is principally used as the most crucial oxidant. Its sprays have substantial fire extinguishing performance, but as they comprise a large amount of potassium ions, Quick to absorb humidity, forming a yellow and sticky solid alkaline conductive liquid film, this material may be very damaging to Digital gear, so K-type aerosol automated fire extinguishing machine can't be Employed in Digital tools, precision instruments and cultural relics Archive put. At the moment, the use available in the market is gradually decreasing.
The 3rd-technology aerosol (S form) is mainly made from strontium salt as the leading oxidant. In contrast to the next-technology potassium salt (K-type) aerosol, strontium ions do not take up humidity, will not sort a conductive Answer, and will not trigger damage to electrical machines. In 2001, China Cellular Communications Company chosen the strontium salt aerosol (S-style aerosol automatic fire extinguishing device) produced by the business soon after stringent inspection and verification to guard its interaction base stations along with other sites equipped with sophisticated electronic gear.
At the moment, strontium salt aerosol products are utilized in Countless engineering tasks, and the third-technology aerosol has grown to be A growing number of acknowledged by people
Aerosol hearth extinguisher application assortment
a. Electrical fire
Interaction home, conversation foundation station, Digital Pc area, etcetera.;
Electrical fires in spots containing precision devices and devices, such as power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and so forth.
b. Good area hearth
Surface area hearth of combustible strong components in areas exactly where combustible reliable elements are utilized or stored.
c. Liquid fire
Liquid fires in areas in which diesel oil is produced, employed or saved (except -35 diesel), heavy oil, transformer oil, animal and vegetable oil and various flammable liquids of Category C; Just before extinguishing a fuel hearth, the fuel source is usually Minimize off.
Aerosol fire suppression system software .
d. The S-type aerosol hearth extinguishing device can not be accustomed to put out the following fires
①Substances which can be oxidized without the need of air, such as nitrocellulose, gunpowder, etcetera.; active metals, which include potassium, sodium, magnesium, titanium, and so forth.; compounds that will decompose by them selves, for example sure peroxides, hydrazine, and so forth. Metallic hydrides, including potassium fluoride, sodium hydride, and so forth. Pure substances, including phosphorus. Powerful oxidants, including nitrogen oxide, fluorine, and many others.
② Deep fire of combustible good supplies.
③ Fireplace in crowded locations, for instance theaters, auditoriums, and so forth.
④ Fireplace in places with explosion hazard, for example workshops with explosive dust.
⑤ Extremely-clean environment, for example pharmaceutical workshops, chip processing locations, professional medical rooms, and so on.
Aerosol fire extinguishing Functioning theory
The four factors of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The fireplace extinguishing system of fireplace extinguishing gas is to get rid of a single or quite a few of the four factors of combustion.
The reliable hearth extinguishing agent within the S-sort aerosol hearth extinguishing gadget is started by electricity, and it undergoes redox response to sort numerous agglomerated hearth extinguishing aerosols, and its composition is principally N2, a little level of CO2, and metal salt strong particles.
Aerosol fireplace extinguishing mechanism is as follows
Mechanism of endothermic cooling and fire extinguishing
Metal salt particles soak up a large amount of warmth at high temperatures, and bear physical endothermic procedures for instance thermal melting and gasification. The flame temperature is lowered after which you can radiated to your combustible combustion surface for gasification of combustible molecules and vaporized combustible molecules. The warmth of pyrolysis of combustion molecules into free radicals will decrease, along with the combustion reaction speed will probably be suppressed to a certain extent.
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