Precisely what is Aerosol fireplace extinguishing
What on earth is aerosol fireplace extinguisher? Aerosol fire extinguishing technology is a new sort of hearth extinguishing know-how made on The premise of military services pyrotechnics.
The initial technology of aerosol fire extinguishing technological know-how was born in our place, often called smoke hearth extinguishing technological know-how, which began inside the early 1960s. It was finished by scientific scientists from your Tianjin Fireplace Analysis Institute of General public Protection, who independently developed an automatic smoke fireplace extinguishing process, which is mainly accustomed to extinguish fires in Class A, B, and C liquid storage tanks.
During the early 1980s, Along with the emergence of environmental defense difficulties of “halon fireplace extinguishing agent”, locating alternate options to halon grew to become a very important study topic.
At the end of the 1980s, Russian experts initial succeeded in exploring aerosol hearth extinguishing know-how which can extinguish fires inside a submerged method, which opened up a different way for halon substitution analysis. Subsequently, aerosol fireplace extinguishing know-how has attracted the attention of your Global Neighborhood, and nations around the world for instance China, The us, Australia, Malaysia as well as other countries have also started research on new aerosol hearth extinguishing technologies.
In most cases, aerosol is really a secure state process shaped with the dispersion of fine sound or liquid particles within a fuel. Skillfully, it refers into a colloidal procedure that takes advantage of gasoline (generally air) as the dispersion medium and sound or liquid particles as being the dispersant.Prevalent aerosols in mother nature—clouds, smoke, fog, etc.The scale with the particles in aerosols is generally while in the get of 10-five to ten-1μm, that has gas fluidity and might diffuse close to hurdles.
The medicament from the aerosol fire suppression system gadget is strong, plus the component emitted from the medicament in the oxidation-reduction reaction is aerosol. The first era of aerosol hearth extinguishing technological innovation-smoke fireplace extinguishing technological innovation.
K-style aerosol fireplace extinguisher, also called potassium salt fireplace extinguishing technologies, is the second stage of the development of aerosol hearth extinguishing technology, which started in the previous Soviet Union inside the mid-sixties. Our state started out late in this regard, commencing inside the early nineties.
In this type of aerosol building agent, potassium nitrate is principally applied as the primary oxidant. Its sprays have substantial fireplace extinguishing efficiency, 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 substance is incredibly harmful to Digital devices, so K-style aerosol automated hearth extinguishing unit can not be Employed in electronic machines, precision devices and cultural relics Archive spot. At present, the use available in the market is gradually lowering.
The 3rd-technology aerosol (S style) is especially fabricated from strontium salt as the key oxidant. Unlike the 2nd-generation potassium salt (K-style) aerosol, strontium ions never absorb humidity, usually do not type a conductive Alternative, and will never lead to harm to electrical equipment. In 2001, China Cellular Communications Corporation chosen the strontium salt aerosol (S-kind aerosol automatic hearth extinguishing system) made by the business soon after rigorous inspection and verification to protect its interaction base stations along with other destinations Outfitted with innovative electronic devices.
At present, strontium salt aerosol products happen to be utilized in Countless engineering tasks, along with the third-era aerosol has become Increasingly more recognized by customers
Aerosol fire extinguisher software selection
a. Electrical hearth
Conversation place, interaction base station, Digital Personal computer space, etcetera.;
Electrical fires in locations containing precision devices and tools, for example energy distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, etc.
b. Reliable floor fire
Floor fire of combustible sound materials in areas where by combustible good materials are used or stored.
c. Liquid fire
Liquid fires in destinations where diesel oil is generated, used or saved (other than -35 diesel), weighty oil, transformer oil, animal and vegetable oil and various flammable liquids of Category C; Ahead of extinguishing a gasoline hearth, the gas resource could be Reduce off.
Aerosol fire suppression procedure software .
d. The S-form aerosol fireplace extinguishing gadget can't be utilized to place out the next fires
①Substances which can be oxidized with out air, including nitrocellulose, gunpowder, and so forth.; Energetic metals, for instance potassium, sodium, magnesium, titanium, etcetera.; compounds that can decompose by by themselves, including particular peroxides, hydrazine, and so forth. Metal hydrides, for instance potassium fluoride, sodium hydride, and many others. All-natural substances, which include phosphorus. Robust oxidants, such as nitrogen oxide, fluorine, etc.
② Deep hearth of combustible stable supplies.
③ Fireplace in crowded places, which include theaters, auditoriums, etc.
④ Hearth in spots with explosion hazard, which include workshops with explosive dust.
⑤ Extremely-cleanse setting, which include pharmaceutical workshops, chip processing places, health care rooms, and so forth.
Aerosol hearth extinguishing Performing principle
The 4 features of combustion: combustibles, oxidizer, temperature and uninhibited chain reaction. The hearth extinguishing system of fire extinguishing gasoline should be to remove 1 or various of your 4 factors of combustion.
The reliable fire extinguishing agent while in the S-variety aerosol fire extinguishing unit is started out by electrical power, and it undergoes redox reaction to form a large number of agglomerated fireplace extinguishing aerosols, and its composition is mainly N2, a little quantity of CO2, and metal salt stable particles.
Aerosol hearth extinguishing system is as follows
Mechanism of endothermic cooling and fireplace extinguishing
Steel salt particles take in a great deal of heat at high temperatures, and go through physical endothermic processes for instance thermal melting and gasification. The flame temperature is decreased then radiated towards the combustible combustion surface for gasification of combustible molecules and vaporized combustible molecules. The heat of pyrolysis of combustion molecules into absolutely free radicals will lessen, and the combustion reaction speed might be suppressed to a certain extent.
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