Precisely what is Aerosol hearth extinguishing
What is aerosol fire extinguisher? Aerosol hearth extinguishing technological innovation is a brand new variety of fire extinguishing technologies produced on The premise of military services pyrotechnics.
The very first technology of aerosol fireplace extinguishing engineering was born in our place, also referred to as smoke fire extinguishing engineering, which began within the early nineteen sixties. It had been finished by scientific researchers with the Tianjin Hearth Investigate Institute of Public Security, who independently developed an automated smoke fire extinguishing program, which is mainly used to extinguish fires at school A, B, and C liquid storage tanks.
Inside the early nineteen eighties, While using the emergence of environmental protection problems of “halon hearth extinguishing agent”, finding possibilities to halon became a crucial analysis topic.
At the end of the eighties, Russian experts very first succeeded in exploring aerosol hearth extinguishing technology that may extinguish fires in the submerged manner, which opened up a new way for halon substitution analysis. Subsequently, aerosol fireplace extinguishing know-how has attracted the eye of the Intercontinental Neighborhood, and countries for example China, America, Australia, Malaysia as well as other countries have also started exploration on new aerosol fireplace extinguishing systems.
In most cases, aerosol is really a secure point out method shaped from the dispersion of great sound or liquid particles inside of a gasoline. Professionally, it refers into a colloidal method that makes use of gasoline (ordinarily air) because the dispersion medium and reliable or liquid particles given that the dispersant.Popular aerosols in mother nature—clouds, smoke, fog, and so on.The dimensions with the particles in aerosols is generally while in the purchase of 10-5 to 10-1μm, which has gas fluidity and may diffuse close to obstacles.
The medicament within the aerosol fireplace suppression process gadget is strong, along with the part emitted via the medicament through the oxidation-reduction reaction is aerosol. The initial era of aerosol fireplace extinguishing know-how-smoke hearth extinguishing technologies.
K-sort aerosol fireplace extinguisher, also called potassium salt hearth extinguishing technological innovation, is the 2nd phase of the event of aerosol hearth extinguishing technologies, which began in the former Soviet Union in the mid-nineteen sixties. Our country began late in this regard, beginning inside the early nineteen nineties.
In this sort of aerosol building agent, potassium nitrate is principally utilised as the key oxidant. Its sprays have substantial fire extinguishing efficiency, but simply because they contain a large amount of potassium ions, Effortless to soak up humidity, forming a yellow and sticky robust alkaline conductive liquid film, this compound may be very damaging to electronic machines, so K-kind aerosol automatic hearth extinguishing product cannot be used in Digital tools, precision devices and cultural relics Archive location. At present, the use available in the market is progressively decreasing.
The third-era aerosol (S variety) is mainly fabricated from strontium salt as the main oxidant. Not like the next-era potassium salt (K-kind) aerosol, strontium ions do not absorb humidity, don't type a conductive Option, and will not trigger harm to electrical machines. In 2001, China Mobile Communications Corporation picked the strontium salt aerosol (S-form aerosol automatic fireplace extinguishing unit) made by the business following rigorous inspection and verification to guard its conversation foundation stations as well as other sites equipped with sophisticated Digital gear.
At present, strontium salt aerosol goods are used in A large number of engineering jobs, as well as the third-generation aerosol happens to be An increasing number of accepted by buyers
Aerosol hearth extinguisher software selection
a. Electrical hearth
Communication place, communication base station, electronic Computer system area, and so forth.;
Electrical fires in areas containing precision instruments and tools, including electric power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and so forth.
b. Good surface fireplace
Floor fireplace of combustible sound resources in locations exactly where combustible strong elements are used or saved.
c. Liquid fire
Liquid fires in sites in which diesel oil is generated, applied or stored (apart from -35 diesel), major oil, transformer oil, animal and vegetable oil and also other flammable liquids of Category C; Just before extinguishing a fuel fire, the fuel source could be Lower off.
Aerosol fire suppression program software .
d. The S-style aerosol fireplace extinguishing device can not be accustomed to set out the next fires
①Substances which might be oxidized with no air, which include nitrocellulose, gunpowder, and so on.; active metals, like potassium, sodium, magnesium, titanium, etc.; compounds that can decompose by by themselves, for example particular peroxides, hydrazine, and so forth. Steel hydrides, including potassium fluoride, sodium hydride, and so on. Natural substances, including phosphorus. Solid oxidants, for instance nitrogen oxide, fluorine, etcetera.
② Deep fire of combustible stable elements.
③ Fireplace in crowded spots, like theaters, auditoriums, and so on.
④ Hearth in areas with explosion hazard, like workshops with explosive dust.
⑤ Ultra-clean up surroundings, including pharmaceutical workshops, chip processing sites, professional medical rooms, and so on.
Aerosol fire extinguishing working principle
The four things of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The hearth extinguishing mechanism of fireplace extinguishing fuel should be to eradicate just one or quite a few of the four elements of combustion.
The solid fireplace extinguishing agent while in the S-variety aerosol hearth extinguishing machine is began by electricity, and it undergoes redox response to sort numerous agglomerated fire extinguishing aerosols, and its composition is mainly N2, a small number of CO2, and metal salt sound particles.
Aerosol fireplace extinguishing system is as follows
System of endothermic cooling and hearth extinguishing
Metal salt particles take in a large amount of heat at substantial temperatures, and undergo Bodily endothermic procedures for example thermal melting and gasification. The flame temperature is decreased and afterwards radiated to your combustible combustion surface area for gasification of combustible molecules and vaporized combustible molecules. The warmth of pyrolysis of combustion molecules into cost-free radicals will reduce, along with the combustion response pace will probably be suppressed to a specific extent.
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