What is Aerosol hearth extinguishing
What's aerosol hearth extinguisher? Aerosol fire extinguishing technological know-how is a different form of fireplace extinguishing technology designed on the basis of armed forces pyrotechnics.
The very first technology of aerosol hearth extinguishing technological know-how was born within our state, often called smoke hearth extinguishing technological know-how, which commenced in the early nineteen sixties. It had been accomplished by scientific scientists from the Tianjin Fire Investigate Institute of Community Safety, who independently designed an computerized smoke hearth extinguishing system, which is principally utilized to extinguish fires at school A, B, and C liquid storage tanks.
Within the early 1980s, with the emergence of environmental safety troubles of “halon fireplace extinguishing agent”, finding alternate options to halon grew to become a significant exploration matter.
At the conclusion of the nineteen eighties, Russian experts 1st succeeded in investigating aerosol fireplace extinguishing technologies that may extinguish fires in a submerged manner, which opened up a brand new way for halon substitution investigate. Subsequently, aerosol hearth extinguishing technology has attracted the eye with the international Neighborhood, and international locations such as China, The usa, Australia, Malaysia and also other nations around the world have also started research on new aerosol hearth extinguishing technologies.
In most cases, aerosol is usually a steady state method shaped through the dispersion of great reliable or liquid particles in the gas. Professionally, it refers to a colloidal technique that makes use of gasoline (usually air) because the dispersion medium and solid or liquid particles because the dispersant.Prevalent aerosols in nature—clouds, smoke, fog, and many others.The scale in the particles in aerosols is usually in the get of ten-5 to 10-1μm, that has gasoline fluidity and will diffuse all-around hurdles.
The medicament in the aerosol hearth suppression system unit is solid, and also the ingredient emitted because of the medicament throughout the oxidation-reduction response is aerosol. The primary technology of aerosol hearth extinguishing technological know-how-smoke hearth extinguishing know-how.
K-sort aerosol fireplace extinguisher, also called potassium salt hearth extinguishing engineering, is the next phase of the event of aerosol fireplace extinguishing technological innovation, which commenced in the former Soviet Union while in the mid-sixties. Our nation started off late On this regard, beginning in the early nineties.
In this sort of aerosol creating agent, potassium nitrate is especially utilized as the leading oxidant. Its sprays have superior fire extinguishing efficiency, but since they have a great deal of potassium ions, Uncomplicated to soak up moisture, forming a yellow and sticky potent alkaline conductive liquid film, this material is quite harming to electronic devices, so K-style aerosol computerized fire extinguishing product can not be used in electronic products, precision devices and cultural relics Archive area. At the moment, the use in the market is step by step decreasing.
The third-technology aerosol (S form) is principally crafted from strontium salt as the principle oxidant. As opposed to the second-generation potassium salt (K-kind) aerosol, strontium ions don't soak up humidity, will not kind a conductive Remedy, and will likely not bring about damage to electrical equipment. In 2001, China Mobile Communications Company picked the strontium salt aerosol (S-variety aerosol automated hearth extinguishing system) made by the business after strict inspection and verification to guard its conversation base stations and other destinations Outfitted with sophisticated Digital machines.
At the moment, strontium salt aerosol products and solutions have been applied in Countless engineering jobs, plus the 3rd-generation aerosol is becoming A lot more approved by consumers
Aerosol fireplace extinguisher software range
a. Electrical hearth
Communication room, communication foundation station, Digital computer space, etcetera.;
Electrical fires in destinations that contains precision devices and gear, for example ability distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, etcetera.
b. Solid surface area hearth
Surface hearth of combustible good components in places in which combustible sound materials are utilised or saved.
c. Liquid fire
Liquid fires in areas where by diesel oil is made, applied or saved (except -35 diesel), hefty oil, transformer oil, animal and vegetable oil and also other flammable liquids of Category C; Prior to extinguishing a fuel fireplace, the gas resource can be Slash off.
Aerosol hearth suppression procedure application .
d. The S-kind aerosol fire extinguishing device cannot be accustomed to put out the next fires
①Substances that may be oxidized without air, such as nitrocellulose, gunpowder, etc.; Energetic metals, for example potassium, sodium, magnesium, titanium, and so forth.; compounds that may decompose by by themselves, such as certain peroxides, hydrazine, and many others. Steel hydrides, which include potassium fluoride, sodium hydride, etcetera. Organic substances, for instance phosphorus. Powerful oxidants, which include nitrogen oxide, fluorine, etc.
② Deep fire of combustible strong supplies.
③ Fireplace in crowded locations, such as theaters, auditoriums, and so on.
④ Fire in places with explosion hazard, for example workshops with explosive dust.
⑤ Extremely-clean up environment, like pharmaceutical workshops, chip processing destinations, health-related rooms, and so forth.
Aerosol hearth extinguishing working basic principle
The 4 aspects of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The fireplace extinguishing mechanism of hearth extinguishing gas is to remove a person or numerous in the 4 components of combustion.
The stable fireplace extinguishing agent from the S-type aerosol fire extinguishing system is began by electrical power, and it undergoes redox reaction to form a lot of agglomerated hearth extinguishing aerosols, and its composition is mainly N2, a small amount of CO2, and steel salt stable particles.
Aerosol hearth extinguishing mechanism is as follows
System of endothermic cooling and fire extinguishing
Metal salt particles take in a great deal of heat at significant temperatures, and go through Actual physical endothermic processes such as thermal melting and gasification. The flame temperature is decreased 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 cost-free radicals will decrease, plus the combustion reaction pace will probably be suppressed to a specific extent.
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