What on earth is Aerosol fire extinguishing
Precisely what is aerosol fireplace extinguisher? Aerosol hearth extinguishing technological innovation is a completely new variety of fireplace extinguishing engineering created on The idea of army pyrotechnics.
The 1st technology of aerosol hearth extinguishing technologies was born inside our country, also known as smoke hearth extinguishing know-how, which began during the early nineteen sixties. It absolutely was accomplished by scientific scientists within the Tianjin Hearth Study Institute of Community Protection, who independently produced an automated smoke fire extinguishing method, which is mainly utilized to extinguish fires at school A, B, and C liquid storage tanks.
From the early nineteen eighties, While using the emergence of environmental protection troubles of “halon hearth extinguishing agent”, finding alternate options to halon turned a vital study subject matter.
At the conclusion of the 1980s, Russian researchers to start with succeeded in researching aerosol fireplace extinguishing technology that will extinguish fires in a submerged fashion, which opened up a completely new way for halon substitution investigate. Subsequently, aerosol hearth extinguishing technological know-how has attracted the attention of your Worldwide community, and nations like China, America, Australia, Malaysia together with other countries have also begun study on new aerosol hearth extinguishing technologies.
Generally speaking, aerosol is a stable state program shaped because of the dispersion of fine strong or liquid particles within a fuel. Skillfully, it refers to the colloidal system that uses gasoline (ordinarily air) given that the dispersion medium and strong or liquid particles because the dispersant.Popular aerosols in mother nature—clouds, smoke, fog, etcetera.The scale in the particles in aerosols is generally during the purchase of 10-5 to ten-1μm, that has gas fluidity and will diffuse all-around obstacles.
The medicament while in the aerosol fire suppression program gadget is good, and the component emitted from the medicament from the oxidation-reduction reaction is aerosol. The primary generation of aerosol hearth extinguishing technologies-smoke hearth extinguishing technologies.
K-form aerosol fireplace extinguisher, also known as potassium salt fireplace extinguishing technological innovation, is the 2nd stage of the event of aerosol fire extinguishing technological innovation, which commenced in the previous Soviet Union inside the mid-sixties. Our nation started off late In this particular regard, starting within the early nineteen nineties.
In this type of aerosol creating agent, potassium nitrate is especially made use of as the key oxidant. Its sprays have substantial fireplace extinguishing effectiveness, but simply because they include a large amount of potassium ions, Effortless to absorb moisture, forming a yellow and sticky solid alkaline conductive liquid movie, this material is incredibly damaging to electronic products, so K-type aerosol automatic hearth extinguishing machine can't be Utilized in Digital equipment, precision devices and cultural relics Archive put. At present, the use out there is progressively decreasing.
The third-era aerosol (S kind) is principally product of strontium salt as the key oxidant. Contrary to the 2nd-technology potassium salt (K-type) aerosol, strontium ions don't take in dampness, tend not to kind a conductive Alternative, and will not lead to damage to electrical products. In 2001, China Cell Communications Corporation chosen the strontium salt aerosol (S-type aerosol computerized hearth extinguishing product) made by the company after strict inspection and verification to shield its conversation foundation stations as well as other locations Geared up with innovative electronic gear.
At the moment, strontium salt aerosol merchandise are already utilized in Many engineering jobs, along with the third-technology aerosol is now An increasing number of acknowledged by people
Aerosol fireplace extinguisher application range
a. Electrical hearth
Interaction area, interaction foundation station, electronic Pc place, and so on.;
Electrical fires in locations that contains precision devices and gear, such as electricity distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, etcetera.
b. Reliable area hearth
Surface fireplace of combustible sound supplies in destinations wherever combustible reliable supplies are used or saved.
c. Liquid hearth
Liquid fires in spots the place diesel oil is generated, applied or stored (except -35 diesel), large oil, transformer oil, animal and vegetable oil as well as other flammable liquids of Class C; Just before extinguishing a gasoline fireplace, the fuel source could be Slice off.
Aerosol fireplace suppression system software .
d. The S-type aerosol fireplace extinguishing product can't be utilized to put out the subsequent fires
①Substances which might be oxidized devoid of air, like nitrocellulose, gunpowder, etc.; Lively metals, which include potassium, sodium, magnesium, titanium, etc.; compounds which can decompose by them selves, which include selected peroxides, hydrazine, etcetera. Metallic hydrides, including potassium fluoride, sodium hydride, etcetera. Normal substances, such as phosphorus. Potent oxidants, for example nitrogen oxide, fluorine, and so on.
② Deep hearth of combustible reliable supplies.
③ Fire in crowded places, for instance theaters, auditoriums, etcetera.
④ Fireplace in places with explosion hazard, including workshops with explosive dust.
⑤ Extremely-clear natural environment, for example pharmaceutical workshops, chip processing places, health care rooms, and many others.
Aerosol fireplace extinguishing Functioning basic principle
The 4 components of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The hearth extinguishing system of fire extinguishing gasoline is to remove a person or a number of from the 4 aspects of combustion.
The strong hearth extinguishing agent while in the S-type aerosol fire extinguishing gadget is begun by electricity, and it undergoes redox response to type a lot of agglomerated fireplace extinguishing aerosols, and its composition is especially N2, a small level of CO2, and metal salt stable particles.
Aerosol fireplace extinguishing system is as follows
Mechanism of endothermic cooling and hearth extinguishing
Metallic salt particles take up a large amount of heat at higher temperatures, and bear physical endothermic processes which include thermal melting and gasification. The flame temperature is reduced after which you can radiated for the combustible combustion surface for gasification of combustible molecules and vaporized combustible molecules. The warmth of pyrolysis of combustion molecules into free of charge radicals will lower, plus the combustion response speed will likely be suppressed to a certain extent.
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