Information You Should Be Informed About Aerosol Fire Extinguishing
Information You Should Be Informed About Aerosol Fire Extinguishing
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Exactly what is Aerosol hearth extinguishing
What exactly is aerosol hearth extinguisher? Aerosol fireplace extinguishing technology is a whole new type of fire extinguishing know-how made on the basis of armed forces pyrotechnics.
The 1st technology of aerosol fireplace extinguishing technology was born inside our country, also called smoke fireplace extinguishing engineering, which started while in the early 1960s. It absolutely was finished by scientific researchers within the Tianjin Fireplace Exploration Institute of Community Stability, who independently produced an computerized smoke fire extinguishing procedure, which is mainly utilized to extinguish fires in school A, B, and C liquid storage tanks.
While in the early nineteen eighties, With all the emergence of environmental security difficulties of “halon hearth extinguishing agent”, finding alternatives to halon turned an essential study subject matter.
At the end of the nineteen eighties, Russian researchers first succeeded in investigating aerosol fire extinguishing know-how that will extinguish fires in a submerged method, which opened up a fresh way for halon substitution investigation. Subsequently, aerosol hearth extinguishing know-how has captivated the attention on the Global Local community, and international locations for example China, The us, Australia, Malaysia and also other nations have also begun investigation on new aerosol hearth extinguishing systems.
Generally speaking, aerosol is usually a steady state system shaped from the dispersion of fine good or liquid particles in the gas. Skillfully, it refers to some colloidal procedure that employs fuel (normally air) because the dispersion medium and stable or liquid particles because the dispersant.Popular aerosols in nature—clouds, smoke, fog, etcetera.The size on the particles in aerosols is generally inside the get of ten-5 to 10-1μm, that has gas fluidity and may diffuse about road blocks.
The medicament from the aerosol fireplace suppression method system is good, as well as the part emitted via the medicament through the oxidation-reduction response is aerosol. The very first generation of aerosol fire extinguishing technological innovation-smoke hearth extinguishing know-how.
K-form aerosol hearth extinguisher, also called potassium salt fire extinguishing technological innovation, is the next phase of the event of aerosol hearth extinguishing technological know-how, which commenced in the former Soviet Union while in the mid-1960s. Our region commenced late On this regard, starting up during the early nineteen nineties.
In this kind of aerosol producing agent, potassium nitrate is mainly utilized as the primary oxidant. Its sprays have higher fireplace extinguishing effectiveness, but as they incorporate a large amount of potassium ions, Easy to soak up dampness, forming a yellow and sticky powerful alkaline conductive liquid movie, this material is very detrimental to electronic gear, so K-type aerosol automatic fireplace extinguishing system cannot be Employed in electronic machines, precision devices and cultural relics Archive position. At this time, the use out there is step by step decreasing.
The third-generation aerosol (S style) is principally made of strontium salt as the principle oxidant. Unlike the next-era potassium salt (K-style) aerosol, strontium ions don't soak up dampness, never form a conductive Remedy, and will not likely cause harm to electrical gear. In 2001, China Mobile Communications Corporation picked the strontium salt aerosol (S-style aerosol computerized fireplace extinguishing system) produced by the corporation after demanding inspection and verification to safeguard its conversation foundation stations and various destinations equipped with sophisticated Digital tools.
At this time, strontium salt aerosol solutions are already used in 1000s of engineering tasks, as well as third-era aerosol has become Progressively more acknowledged by buyers
Aerosol fire extinguisher application range
a. Electrical hearth
Interaction area, interaction base station, Digital Laptop room, etcetera.;
Electrical fires in spots made up of precision instruments and gear, such as power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and so on.
b. Stable surface fire
Surface area fire of combustible strong supplies in destinations where by combustible good materials are used or saved.
c. Liquid fireplace
Liquid fires in destinations wherever diesel oil is generated, utilised or stored (except -35 diesel), large oil, transformer oil, animal and vegetable oil and also other flammable liquids of Group C; Ahead of extinguishing a gasoline fire, the fuel resource might be Minimize off.
Aerosol fire suppression method application .
d. The S-variety aerosol hearth extinguishing unit cannot be used to set out the next fires
1. Substances which can be oxidized without having air, including nitrocellulose, gunpowder, etc.; Energetic metals, like potassium, sodium, magnesium, titanium, etc.; compounds which will decompose by on their own, which include specified peroxides, hydrazine, etc. Steel hydrides, like potassium fluoride, sodium hydride, and many others. All-natural substances, which include phosphorus. Robust oxidants, for instance nitrogen oxide, fluorine, and so on.
2. Deep hearth of combustible stable supplies.
3. Hearth in crowded destinations, such as theaters, auditoriums, and so on.
4. Hearth in spots with explosion hazard, which include workshops with explosive dust.
5. Extremely-thoroughly clean setting, for instance pharmaceutical workshops, chip processing sites, healthcare rooms, and so on.
Aerosol fire extinguishing Operating principle
The 4 elements of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The hearth extinguishing system of hearth extinguishing fuel is to eradicate a single or numerous from the 4 factors of combustion.
The strong fireplace extinguishing agent while in the S-sort aerosol fireplace extinguishing system is began by energy, and it undergoes redox reaction to variety a lot of agglomerated fireplace extinguishing aerosols, and its composition is mainly N2, a little amount of CO2, and steel salt good particles.
Aerosol fire extinguishing system is as follows
System of endothermic cooling and fire extinguishing
Steel salt particles take in a great deal of heat at substantial temperatures, and undergo physical endothermic processes which include thermal melting and gasification. The flame temperature is lowered then radiated to the combustible combustion floor for gasification of combustible molecules and vaporized combustible molecules. The warmth of pyrolysis of combustion molecules into free radicals will reduce, plus the combustion response velocity will be suppressed to a certain extent.
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