What exactly is Aerosol fire extinguishing
What on earth is aerosol fireplace extinguisher? Aerosol hearth extinguishing engineering is a whole new kind of fireplace extinguishing know-how designed on The idea of armed service pyrotechnics.
The first era of aerosol hearth extinguishing engineering was born in our region, generally known as smoke fire extinguishing engineering, which started inside the early 1960s. It had been accomplished by scientific researchers within the Tianjin Fireplace Analysis Institute of General public Protection, who independently designed an automated smoke fire extinguishing method, which is mainly utilized to extinguish fires in school A, B, and C liquid storage tanks.
During the early 1980s, Along with the emergence of environmental protection issues of “halon fireplace extinguishing agent”, discovering choices to halon became a vital investigate matter.
At the conclusion of the eighties, Russian scientists initial succeeded in studying aerosol fireplace extinguishing technology that may extinguish fires in a very submerged fashion, which opened up a new way for halon substitution study. Subsequently, aerosol fireplace extinguishing engineering has captivated the eye in the Worldwide Group, and nations for example China, The usa, Australia, Malaysia along with other nations have also begun investigate on new aerosol hearth extinguishing technologies.
Generally speaking, aerosol is usually a secure point out system fashioned via the dispersion of high-quality stable or liquid particles within a gas. Professionally, it refers to the colloidal system that uses fuel (typically air) since the dispersion medium and solid or liquid particles since the dispersant.Common aerosols in mother nature—clouds, smoke, fog, etc.The size in the particles in aerosols is usually during the buy of ten-5 to ten-1μm, that has gasoline fluidity and can diffuse all around obstructions.
The medicament from the aerosol fireplace suppression system unit is good, plus the component emitted by the medicament through the oxidation-reduction response is aerosol. The primary era of aerosol hearth extinguishing engineering-smoke hearth extinguishing technology.
K-type aerosol hearth extinguisher, also called potassium salt hearth extinguishing technological know-how, is the next phase of the development of aerosol fireplace extinguishing technologies, which began in the previous Soviet Union within the mid-sixties. Our state begun late Within this regard, starting inside the early nineties.
In this sort of aerosol producing agent, potassium nitrate is principally employed as the principle oxidant. Its sprays have high fireplace extinguishing effectiveness, but because they consist of a great deal of potassium ions, Quick to absorb dampness, forming a yellow and sticky robust alkaline conductive liquid movie, this compound may be very harming to Digital machines, so K-form aerosol automated fire extinguishing product can't be Utilized in Digital tools, precision devices and cultural relics Archive location. At the moment, the use out there is steadily lowering.
The 3rd-era aerosol (S kind) is principally made of strontium salt as the leading oxidant. Not like the 2nd-generation potassium salt (K-type) aerosol, strontium ions tend not to take up humidity, never kind a conductive Option, and will never result in harm to electrical gear. In 2001, China Mobile Communications Corporation selected the strontium salt aerosol (S-form aerosol automated fireplace extinguishing device) made by the company immediately after strict inspection and verification to safeguard its communication base stations as well as other spots equipped with subtle Digital machines.
At the moment, strontium salt aerosol merchandise have been utilized in Countless engineering tasks, as well as third-generation aerosol happens to be Progressively more approved by users
Aerosol hearth extinguisher application range
a. Electrical fireplace
Communication home, interaction base station, Digital Laptop or computer space, etcetera.;
Electrical fires in locations containing precision instruments and gear, for example ability distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, etc.
b. Reliable area hearth
Area fireplace of combustible good materials in spots wherever combustible stable elements are used or stored.
c. Liquid fire
Liquid fires in locations the place diesel oil is generated, utilised or saved (besides -35 diesel), hefty oil, transformer oil, animal and vegetable oil along with other flammable liquids of Class C; Prior to extinguishing a gasoline fire, the fuel source is often cut off.
Aerosol fireplace suppression technique software .
d. The S-style aerosol hearth extinguishing system cannot be used to put out the following fires
①Substances which can be oxidized with no air, for instance nitrocellulose, gunpowder, etcetera.; active metals, such as potassium, sodium, magnesium, titanium, and many others.; compounds that could decompose by by themselves, for example particular peroxides, hydrazine, and many others. Steel hydrides, for instance potassium fluoride, sodium hydride, and so on. Normal substances, including phosphorus. Sturdy oxidants, including nitrogen oxide, fluorine, and many others.
② Deep hearth of combustible good resources.
③ Fire in crowded destinations, like theaters, auditoriums, etcetera.
④ Hearth in locations with explosion hazard, which include workshops with explosive dust.
⑤ Ultra-cleanse setting, like pharmaceutical workshops, chip processing sites, medical rooms, and so on.
Aerosol fireplace extinguishing Doing the job principle
The four aspects of combustion: combustibles, oxidizer, temperature and uninhibited chain reaction. The fireplace extinguishing mechanism of hearth extinguishing gasoline is usually to eliminate a person or quite a few from the four components of combustion.
The reliable hearth extinguishing agent during the S-variety aerosol fireplace extinguishing gadget is commenced by energy, and it undergoes redox response to form a lot of agglomerated hearth extinguishing aerosols, and its composition is principally N2, a small degree of CO2, and steel salt strong particles.
Aerosol hearth extinguishing system is as follows
Mechanism of endothermic cooling and fireplace extinguishing
Metal salt particles take in a great deal of warmth at large temperatures, and endure Actual physical endothermic processes such as thermal melting and gasification. The flame temperature is reduced and then radiated into the combustible combustion floor for gasification of combustible molecules and vaporized combustible molecules. The warmth of pyrolysis of combustion molecules into no cost radicals will lower, as well as combustion reaction speed is going to be suppressed to a certain extent.
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