What is Aerosol hearth extinguishing
Precisely what is aerosol fireplace extinguisher? Aerosol fireplace extinguishing know-how is a brand new kind of fire extinguishing technological innovation developed on The premise of military services pyrotechnics.
The first era of aerosol hearth extinguishing know-how was born in our nation, often known as smoke fireplace extinguishing technological know-how, which commenced while in the early sixties. It was concluded by scientific researchers from the Tianjin Fireplace Research Institute of General public Stability, who independently developed an computerized smoke fire extinguishing program, which is principally used to extinguish fires in school A, B, and C liquid storage tanks.
In the early 1980s, Using the emergence of environmental safety challenges of “halon fire extinguishing agent”, locating possibilities to halon became a crucial study subject.
At the end of the nineteen eighties, Russian researchers first succeeded in researching aerosol fire extinguishing technological innovation which will extinguish fires inside a submerged way, which opened up a brand new way for halon substitution research. Subsequently, aerosol fireplace extinguishing engineering has captivated the attention in the Global Local community, and countries such as China, The usa, Australia, Malaysia and various international locations have also begun exploration on new aerosol fireplace extinguishing systems.
In most cases, aerosol is often a steady point out procedure formed with the dispersion of high-quality sound or liquid particles in a very gasoline. Skillfully, it refers to the colloidal procedure that uses fuel (ordinarily air) because the dispersion medium and good or liquid particles as being the dispersant.Widespread aerosols in mother nature—clouds, smoke, fog, and many others.The scale from the particles in aerosols is generally inside the get of ten-5 to 10-oneμm, that has gas fluidity and might diffuse all around obstructions.
The medicament within the aerosol fireplace suppression method product is solid, as well as element emitted with the medicament throughout the oxidation-reduction response is aerosol. The main era of aerosol fireplace extinguishing technology-smoke hearth extinguishing technological know-how.
K-kind aerosol hearth extinguisher, also referred to as potassium salt fire extinguishing know-how, is the 2nd stage of the development of aerosol fireplace extinguishing technologies, which commenced in the former Soviet Union within the mid-1960s. Our country commenced late In this particular regard, starting inside the early nineteen nineties.
In this sort of aerosol generating agent, potassium nitrate is especially used as the principle oxidant. Its sprays have higher hearth extinguishing efficiency, but as they comprise a large amount of potassium ions, Quick to soak up humidity, forming a yellow and sticky powerful alkaline conductive liquid movie, this compound is extremely detrimental to Digital tools, so K-variety aerosol computerized hearth extinguishing unit cannot be used in electronic tools, precision devices and cultural relics Archive position. At the moment, the use out there is step by step reducing.
The 3rd-generation aerosol (S kind) is principally made from strontium salt as the primary oxidant. Unlike the next-technology potassium salt (K-type) aerosol, strontium ions don't take in humidity, tend not to form a conductive solution, and will likely not bring about harm to electrical equipment. In 2001, China Cell Communications Corporation chosen the strontium salt aerosol (S-variety aerosol automatic fireplace extinguishing gadget) made by the business right after rigid inspection and verification to safeguard its communication foundation stations and other sites equipped with refined Digital products.
At present, strontium salt aerosol products and solutions are actually applied in Countless engineering tasks, as well as the 3rd-generation aerosol has become A lot more approved by people
Aerosol hearth extinguisher application assortment
a. Electrical fireplace
Conversation room, communication foundation station, Digital Computer system area, and so forth.;
Electrical fires in places that contains precision devices and gear, like power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, etcetera.
b. Stable surface hearth
Surface fireplace of combustible sound products in locations where combustible good elements are utilized or saved.
c. Liquid fireplace
Liquid fires in areas the place diesel oil is created, made use of or saved (except -35 diesel), hefty oil, transformer oil, animal and vegetable oil along with other flammable liquids of Category C; In advance of extinguishing a fuel fire, the fuel resource is often Reduce off.
Aerosol fire suppression method application .
d. The S-style aerosol fireplace extinguishing unit can not be accustomed to place out the next fires
①Substances which might be oxidized with out air, like nitrocellulose, gunpowder, and many others.; Energetic metals, for instance potassium, sodium, magnesium, titanium, etcetera.; compounds which can decompose by themselves, for example specific peroxides, hydrazine, and so on. Metal hydrides, including potassium fluoride, sodium hydride, and many others. Organic substances, including phosphorus. Strong oxidants, for instance nitrogen oxide, fluorine, etcetera.
② Deep fire of combustible good elements.
③ Hearth in crowded places, for example theaters, auditoriums, etcetera.
④ Fireplace in spots with explosion hazard, which include workshops with explosive dust.
⑤ Ultra-clean ecosystem, such as pharmaceutical workshops, chip processing areas, health-related rooms, etcetera.
Aerosol fireplace extinguishing working principle
The four elements of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The fire extinguishing system of fire extinguishing gasoline is always to remove a single or a number of from the four features of combustion.
The good fireplace extinguishing agent inside the S-form aerosol fire extinguishing machine is started off by electric power, and it undergoes redox reaction to variety a lot of agglomerated fire extinguishing aerosols, and its composition is principally N2, a little degree of CO2, and metallic salt stable particles.
Aerosol fireplace extinguishing system is as follows
System of endothermic cooling and fire extinguishing
Steel salt particles absorb a large amount of warmth at superior temperatures, and undertake Actual physical endothermic processes including thermal melting and gasification. The flame temperature is decreased after which you can radiated for the combustible combustion surface for gasification of combustible molecules and vaporized combustible molecules. The heat of pyrolysis of combustion molecules into totally free radicals will lower, plus the combustion reaction speed will likely be suppressed to a specific extent.
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