Exactly what is Aerosol fire extinguishing
What exactly is aerosol fireplace extinguisher? Aerosol fireplace extinguishing technological know-how is a whole new sort of fire extinguishing technological know-how produced on the basis of army pyrotechnics.
The first technology of aerosol fire extinguishing technology was born within our country, also called smoke hearth extinguishing engineering, which started during the early 1960s. It had been done by scientific scientists from the Tianjin Fireplace Exploration Institute of Community Security, who independently produced an automated smoke fireplace extinguishing process, which is principally used to extinguish fires at school A, B, and C liquid storage tanks.
In the early 1980s, Using the emergence of environmental safety issues of “halon fireplace extinguishing agent”, finding choices to halon turned a significant study subject matter.
At the end of the nineteen eighties, Russian experts 1st succeeded in researching aerosol fire extinguishing know-how which will extinguish fires inside of a submerged fashion, which opened up a different way for halon substitution research. Subsequently, aerosol fireplace extinguishing know-how has captivated the attention with the international Neighborhood, and international locations such as China, America, Australia, Malaysia together with other countries have also started investigate on new aerosol fireplace extinguishing technologies.
Most of the time, aerosol is actually a secure point out method shaped through the dispersion of high-quality good or liquid particles in a fuel. Professionally, it refers into a colloidal program that works by using gas (commonly air) as being the dispersion medium and solid or liquid particles since the dispersant.Typical aerosols in nature—clouds, smoke, fog, etcetera.The dimensions with the particles in aerosols is generally from the get of 10-5 to ten-oneμm, that has gasoline fluidity and might diffuse about obstructions.
The medicament within the aerosol hearth suppression technique product is solid, as well as ingredient emitted via the medicament through the oxidation-reduction response is aerosol. The main technology of aerosol hearth extinguishing technology-smoke fire extinguishing technological know-how.
K-kind aerosol fireplace extinguisher, also called potassium salt hearth extinguishing technologies, is the second phase of the development of aerosol fire extinguishing technological innovation, which commenced in the former Soviet Union inside the mid-1960s. Our state begun late In this particular regard, starting off within the early nineteen nineties.
In this type of aerosol building agent, potassium nitrate is mainly utilised as the primary oxidant. Its sprays have large fire extinguishing performance, but simply because they consist of a large amount of potassium ions, Quick to soak up moisture, forming a yellow and sticky potent alkaline conductive liquid movie, this compound is rather harmful to Digital equipment, so K-type aerosol automatic fire extinguishing device can't be Utilized in Digital tools, precision instruments and cultural relics Archive place. At present, the use on the market is gradually reducing.
The third-generation aerosol (S form) is mainly made of strontium salt as the most crucial oxidant. As opposed to the 2nd-generation potassium salt (K-sort) aerosol, strontium ions usually do not soak up humidity, will not variety a conductive solution, and will likely not lead to damage to electrical machines. In 2001, China Cell Communications Company selected the strontium salt aerosol (S-type aerosol automated fire extinguishing machine) produced by the corporation following demanding inspection and verification to shield its interaction base stations as well as other places equipped with advanced Digital devices.
At this time, strontium salt aerosol products are already used in A huge number of engineering tasks, and the 3rd-generation aerosol happens to be A growing number of accepted by end users
Aerosol fireplace extinguisher software vary
a. Electrical fire
Communication room, conversation base station, Digital Pc room, and many others.;
Electrical fires in spots made up of precision instruments and equipment, for example electrical power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, etcetera.
b. Stable area fireplace
Area fireplace of combustible strong elements in locations in which combustible stable products are utilised or saved.
c. Liquid fire
Liquid fires in places in which diesel oil is developed, applied or stored (other than -35 diesel), hefty oil, transformer oil, animal and vegetable oil together with other flammable liquids of Classification C; Before extinguishing a fuel fire, the gas resource could be Lower off.
Aerosol fire suppression program software .
d. The S-form aerosol fireplace extinguishing system cannot be accustomed to put out the subsequent fires
①Substances that can be oxidized without the need of air, for example nitrocellulose, gunpowder, and many others.; Lively metals, which include potassium, sodium, magnesium, titanium, and so on.; compounds which will decompose by themselves, such as selected peroxides, hydrazine, etcetera. Metallic hydrides, like potassium fluoride, sodium hydride, and many others. Natural substances, for instance phosphorus. Robust oxidants, like nitrogen oxide, fluorine, etcetera.
② Deep fire of combustible solid products.
③ Hearth in crowded destinations, including theaters, auditoriums, and so forth.
④ Hearth in sites with explosion hazard, for example workshops with explosive dust.
⑤ Ultra-cleanse setting, for example pharmaceutical workshops, chip processing places, clinical rooms, and so on.
Aerosol hearth extinguishing Performing theory
The four factors of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The fireplace extinguishing mechanism of hearth extinguishing gas will be to get rid of one particular or many of the four elements of combustion.
The reliable fire extinguishing agent inside the S-style aerosol fireplace extinguishing device is started by energy, and it undergoes redox response to sort a large number of agglomerated hearth extinguishing aerosols, and its composition is especially N2, a little quantity of CO2, and metal salt reliable particles.
Aerosol fire extinguishing system is as follows
Mechanism of endothermic cooling and fireplace extinguishing
Metal salt particles soak up a great deal of warmth at large temperatures, and undergo Bodily endothermic processes which include thermal melting and gasification. The flame temperature is decreased after which radiated to your combustible combustion surface area for gasification of combustible molecules and vaporized combustible molecules. The warmth of pyrolysis of combustion molecules into totally free radicals will decrease, along with the combustion reaction speed will be suppressed to a specific extent.
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