Exactly what is Aerosol fire extinguishing
Exactly what is aerosol fireplace extinguisher? Aerosol hearth extinguishing technological know-how is a whole new kind of fireplace extinguishing technology produced on The premise of navy pyrotechnics.
The primary technology of aerosol hearth extinguishing engineering was born inside our country, often called smoke fireplace extinguishing technological know-how, which began while in the early sixties. It had been concluded by scientific scientists in the Tianjin Fireplace Research Institute of General public Stability, who independently developed an computerized smoke fireplace extinguishing system, which is principally used to extinguish fires in school A, B, and C liquid storage tanks.
Within the early 1980s, With all the emergence of environmental security difficulties of “halon fire extinguishing agent”, obtaining solutions to halon grew to become a very important research topic.
At the conclusion of the nineteen eighties, Russian experts first succeeded in studying aerosol hearth extinguishing know-how which can extinguish fires in a very submerged method, which opened up a new way for halon substitution study. Subsequently, aerosol fire extinguishing know-how has attracted the attention with the international Neighborhood, and nations around the world such as China, America, Australia, Malaysia and also other nations have also begun analysis on new aerosol fireplace extinguishing systems.
Generally speaking, aerosol is often a stable condition system shaped because of the dispersion of high-quality stable or liquid particles within a gasoline. Skillfully, it refers to the colloidal procedure that makes use of fuel (typically air) because the dispersion medium and reliable or liquid particles as being the dispersant.Widespread aerosols in character—clouds, smoke, fog, and many others.The dimensions with the particles in aerosols is mostly during the order of 10-5 to 10-oneμm, which has fuel fluidity and might diffuse around hurdles.
The medicament in the aerosol hearth suppression procedure machine is strong, plus the component emitted via the medicament throughout the oxidation-reduction response is aerosol. The primary generation of aerosol fireplace extinguishing technologies-smoke hearth extinguishing technological know-how.
K-sort aerosol fire extinguisher, also referred to as potassium salt hearth extinguishing technologies, is the 2nd stage of the event of aerosol hearth extinguishing technologies, which commenced in the former Soviet Union inside the mid-1960s. Our region begun late In this particular regard, commencing while in the early nineties.
In this sort of aerosol making agent, potassium nitrate is especially used as the leading oxidant. Its sprays have significant hearth extinguishing efficiency, but given that they comprise a great deal of potassium ions, Straightforward to absorb moisture, forming a yellow and sticky strong alkaline conductive liquid movie, this compound is very damaging to Digital machines, so K-form aerosol automatic hearth extinguishing gadget cannot be Employed in electronic equipment, precision instruments and cultural relics Archive spot. At the moment, the use out there is steadily reducing.
The third-technology aerosol (S form) is mainly crafted from strontium salt as the key oxidant. Compared with the second-technology potassium salt (K-type) aerosol, strontium ions will not absorb moisture, do not variety a conductive Alternative, and will likely not lead to harm to electrical products. In 2001, China Cell Communications Corporation chosen the strontium salt aerosol (S-variety aerosol automated hearth extinguishing machine) produced by the company soon after rigid inspection and verification to protect its interaction foundation stations along with other spots Geared up with innovative electronic equipment.
At the moment, strontium salt aerosol products happen to be applied in A huge number of engineering jobs, as well as third-era aerosol has grown to be An increasing number of acknowledged by consumers
Aerosol hearth extinguisher software selection
a. Electrical fire
Interaction home, conversation base station, Digital Pc home, etcetera.;
Electrical fires in places made up of precision instruments and tools, for instance ability distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and many others.
b. Solid area fireplace
Surface fireplace of combustible sound elements in sites exactly where combustible stable elements are utilised or stored.
c. Liquid hearth
Liquid fires in spots in which diesel oil is produced, employed or saved (apart from -35 diesel), large oil, transformer oil, animal and vegetable oil and other flammable liquids of Class C; Before extinguishing a gasoline fire, the gas supply might be Slice off.
Aerosol hearth suppression method application .
d. The S-kind aerosol hearth extinguishing system can't be accustomed to put out the subsequent fires
①Substances which might be oxidized without the need of air, including nitrocellulose, gunpowder, etc.; Lively metals, which include potassium, sodium, magnesium, titanium, etc.; compounds which will decompose by them selves, including selected peroxides, hydrazine, etc. Steel hydrides, like potassium fluoride, sodium hydride, and many others. Pure substances, including phosphorus. Sturdy oxidants, for instance nitrogen oxide, fluorine, and so on.
② Deep hearth of combustible solid resources.
③ Fire in crowded areas, including theaters, auditoriums, and so on.
④ Fire in destinations with explosion hazard, for example workshops with explosive dust.
⑤ Extremely-clear setting, for instance pharmaceutical workshops, chip processing sites, clinical rooms, etc.
Aerosol fireplace extinguishing Doing work theory
The 4 factors of combustion: combustibles, oxidizer, temperature and uninhibited chain reaction. The fire extinguishing system of fireplace extinguishing fuel is always to remove 1 or quite a few from the 4 aspects of combustion.
The good hearth extinguishing agent in the S-style aerosol fireplace extinguishing device is began by electric power, and it undergoes redox response to type numerous agglomerated fire extinguishing aerosols, and its composition is mainly N2, a little number of CO2, and steel salt solid particles.
Aerosol fire extinguishing mechanism is as follows
System of endothermic cooling and hearth extinguishing
Metal salt particles take up a great deal of heat at large temperatures, and undergo Actual physical endothermic procedures for instance thermal melting and gasification. The flame temperature is decreased and after that radiated towards the combustible combustion floor for gasification of combustible molecules and vaporized combustible molecules. The heat of pyrolysis of combustion molecules into cost-free radicals will lessen, and the combustion response pace are going to be suppressed to a specific extent.
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