What on earth is Aerosol fire extinguishing
What on earth is aerosol fire extinguisher? Aerosol fireplace extinguishing technological innovation is a completely new variety of hearth extinguishing technological innovation formulated on The premise of military pyrotechnics.
The initial generation of aerosol fire extinguishing technologies was born within our place, generally known as smoke fire extinguishing technologies, which started while in the early nineteen sixties. It absolutely was completed by scientific researchers in the Tianjin Hearth Research Institute of Community Protection, who independently made an automatic smoke hearth extinguishing technique, which is principally accustomed to extinguish fires in school A, B, and C liquid storage tanks.
During the early eighties, With all the emergence of environmental defense troubles of “halon fireplace extinguishing agent”, locating options to halon grew to become an important study subject matter.
At the conclusion of the eighties, Russian experts first succeeded in studying aerosol hearth extinguishing technological innovation that may extinguish fires in a submerged way, which opened up a whole new way for halon substitution study. Subsequently, aerosol fire extinguishing engineering has captivated the attention in the Worldwide Group, and nations around the world including China, The us, Australia, Malaysia together with other international locations have also begun research on new aerosol fire extinguishing technologies.
Generally speaking, aerosol is actually a secure condition technique formed because of the dispersion of fine sound or liquid particles inside of a fuel. Skillfully, it refers to the colloidal process that utilizes gas (generally air) as being the dispersion medium and stable or liquid particles since the dispersant.Prevalent aerosols in nature—clouds, smoke, fog, and so forth.The scale with the particles in aerosols is generally while in the purchase of 10-5 to ten-1μm, which has gas fluidity and might diffuse all-around road blocks.
The medicament inside the aerosol fireplace suppression method gadget is reliable, along with the ingredient emitted through the medicament with the oxidation-reduction reaction is aerosol. The very first technology of aerosol fire extinguishing technology-smoke fireplace extinguishing know-how.
K-sort aerosol fire extinguisher, also referred to as potassium salt hearth extinguishing know-how, is the 2nd phase of the event of aerosol fireplace extinguishing technologies, which started in the former Soviet Union in the mid-1960s. Our region started late On this regard, starting off from the early 1990s.
In such a aerosol building agent, potassium nitrate is mainly employed as the principle oxidant. Its sprays have higher hearth extinguishing performance, but since they comprise a large amount of potassium ions, Effortless to absorb moisture, forming a yellow and sticky sturdy alkaline conductive liquid film, this compound is rather damaging to Digital gear, so K-variety aerosol automatic fireplace extinguishing product cannot be Employed in Digital devices, precision devices and cultural relics Archive position. At this time, the use out there is slowly lowering.
The 3rd-era aerosol (S style) is principally manufactured from strontium salt as the primary oxidant. As opposed to the next-technology potassium salt (K-variety) aerosol, strontium ions do not absorb dampness, tend not to sort a conductive Resolution, and is not going to lead to damage to electrical tools. In 2001, China Mobile Communications Corporation chosen the strontium salt aerosol (S-sort aerosol automatic hearth extinguishing product) made by the corporate after stringent inspection and verification to protect its interaction base stations along with other places Outfitted with complex electronic products.
At this time, strontium salt aerosol items have already been utilized in thousands of engineering assignments, along with the third-technology aerosol has become more and more acknowledged by customers
Aerosol fire extinguisher software variety
a. Electrical fireplace
Communication home, communication base station, electronic Laptop room, etc.;
Electrical fires in spots made up of precision instruments and tools, like electric power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and so forth.
b. Sound area hearth
Surface hearth of combustible stable components in destinations where combustible good elements are applied or saved.
c. Liquid fire
Liquid fires in places where by diesel oil is produced, used or saved (other than -35 diesel), significant oil, transformer oil, animal and vegetable oil as well as other flammable liquids of Classification C; In advance of extinguishing a fuel fire, the fuel source might be Reduce off.
Aerosol fireplace suppression method software .
d. The S-variety aerosol fireplace extinguishing device can't be used to put out the next fires
①Substances that could be oxidized without the need of air, such as nitrocellulose, gunpowder, etcetera.; Energetic metals, including potassium, sodium, magnesium, titanium, and so on.; compounds which will decompose by themselves, including certain peroxides, hydrazine, etc. Metallic hydrides, including potassium fluoride, sodium hydride, and so on. Organic substances, such as phosphorus. Powerful oxidants, for example nitrogen oxide, fluorine, and so on.
② Deep fire of combustible solid products.
③ Hearth in crowded spots, for example theaters, auditoriums, and so forth.
④ Fireplace in locations with explosion hazard, like workshops with explosive dust.
⑤ Ultra-clean environment, such as pharmaceutical workshops, chip processing places, professional medical rooms, and so forth.
Aerosol fireplace extinguishing working principle
The 4 things of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The hearth extinguishing mechanism of fire extinguishing gasoline is always to eliminate one or quite a few with the 4 aspects of combustion.
The reliable hearth extinguishing agent from the S-form aerosol fire extinguishing gadget is commenced by energy, and it undergoes redox reaction to kind a large number of agglomerated hearth extinguishing aerosols, and its composition is principally N2, a small level of CO2, and metallic salt strong particles.
Aerosol hearth extinguishing system is as follows
System of endothermic cooling and fireplace extinguishing
Metal salt particles absorb a great deal of warmth at significant temperatures, and endure Actual physical endothermic processes like thermal melting and gasification. The flame temperature is lowered after which radiated to your combustible combustion surface for gasification of combustible molecules and vaporized combustible molecules. The warmth of pyrolysis of combustion molecules into totally free radicals will minimize, and also the combustion reaction speed will be suppressed to a particular extent.
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