Precisely what is Aerosol fire extinguishing
Precisely what is aerosol hearth extinguisher? Aerosol fire extinguishing engineering is a fresh form of fire extinguishing know-how designed on The idea of armed service pyrotechnics.
The main technology of aerosol hearth extinguishing technological know-how was born inside our nation, often known as smoke fire extinguishing know-how, which began inside the early 1960s. It absolutely was completed by scientific scientists through the Tianjin Fire Investigation Institute of Community Stability, who independently formulated an computerized smoke hearth extinguishing system, which is mainly accustomed to extinguish fires in Class A, B, and C liquid storage tanks.
From the early 1980s, with the emergence of environmental safety troubles of “halon fire extinguishing agent”, discovering solutions to halon turned an important exploration subject.
At the conclusion of the 1980s, Russian experts very first succeeded in researching aerosol fireplace extinguishing technology that could extinguish fires in a very submerged manner, which opened up a fresh way for halon substitution investigate. Subsequently, aerosol hearth extinguishing engineering has captivated the eye from the international Neighborhood, and nations around the world for instance China, America, Australia, Malaysia as well as other nations have also started investigation on new aerosol fireplace extinguishing systems.
Most of the time, aerosol is often a stable point out method formed via the dispersion of good reliable or liquid particles within a fuel. Skillfully, it refers into a colloidal process that takes advantage of gasoline (normally air) given that the dispersion medium and good or liquid particles as being the dispersant.Common aerosols in nature—clouds, smoke, fog, and so on.The dimensions in the particles in aerosols is usually while in the get of 10-5 to ten-oneμm, which has gasoline fluidity and can diffuse close to hurdles.
The medicament while in the aerosol fireplace suppression program machine is solid, as well as the ingredient emitted with the medicament in the oxidation-reduction response is aerosol. The main era of aerosol fire extinguishing technologies-smoke fireplace extinguishing technology.
K-type aerosol fireplace extinguisher, also referred to as potassium salt hearth extinguishing technological know-how, is the next phase of the development of aerosol fire extinguishing technological innovation, which started in the previous Soviet Union from the mid-1960s. Our state started out late On this regard, starting while in the early nineteen nineties.
In this sort of aerosol generating agent, potassium nitrate is especially employed as the key oxidant. Its sprays have higher fireplace extinguishing performance, but because they include a large amount of potassium ions, Straightforward to soak up humidity, forming a yellow and sticky powerful alkaline conductive liquid movie, this substance is very damaging to Digital equipment, so K-form aerosol automatic fireplace extinguishing device can't be Employed in Digital devices, precision instruments and cultural relics Archive location. At the moment, the use on the market is gradually lowering.
The 3rd-technology aerosol (S form) is principally fabricated from strontium salt as the most crucial oxidant. Compared with the next-technology potassium salt (K-kind) aerosol, strontium ions don't absorb dampness, don't form a conductive Alternative, and will likely not induce harm to electrical devices. In 2001, China Mobile Communications Corporation chosen the strontium salt aerosol (S-variety aerosol automated hearth extinguishing product) made by the company immediately after rigid inspection and verification to safeguard its conversation foundation stations together with other spots equipped with innovative electronic products.
At present, strontium salt aerosol products have been used in thousands of engineering assignments, as well as the 3rd-technology aerosol is now Increasingly more acknowledged by end users
Aerosol fireplace extinguisher application selection
a. Electrical fireplace
Communication place, communication base station, electronic computer room, and many others.;
Electrical fires in spots made up of precision instruments and machines, such as electricity distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, etc.
b. Strong surface area fire
Surface hearth of combustible solid products in places where by combustible stable elements are applied or stored.
c. Liquid hearth
Liquid fires in areas wherever diesel oil is created, employed or stored (apart from -35 diesel), weighty oil, transformer oil, animal and vegetable oil as well as other flammable liquids of Group C; Prior to extinguishing a fuel fireplace, the fuel supply could be Slash off.
Aerosol fire suppression process application .
d. The S-variety aerosol fireplace extinguishing gadget cannot be used to put out the following fires
①Substances which can be oxidized without the need of air, for instance nitrocellulose, gunpowder, and many others.; Lively metals, including potassium, sodium, magnesium, titanium, and so forth.; compounds that could decompose by by themselves, such as specified peroxides, hydrazine, and many others. Metallic hydrides, such as potassium fluoride, sodium hydride, etcetera. Organic substances, like phosphorus. Robust oxidants, like nitrogen oxide, fluorine, and so forth.
② Deep fire of combustible reliable elements.
③ Fireplace in crowded places, for example theaters, auditoriums, and so forth.
④ Hearth in destinations with explosion hazard, for instance workshops with explosive dust.
⑤ Extremely-clear surroundings, which include pharmaceutical workshops, chip processing spots, health care rooms, and so on.
Aerosol fireplace extinguishing Doing work theory
The four elements of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The hearth extinguishing mechanism of fire extinguishing gas is always to eliminate just one or quite a few of the four elements of combustion.
The solid fire extinguishing agent inside the S-variety aerosol hearth extinguishing unit is begun by electric power, and it undergoes redox response to variety numerous agglomerated fire extinguishing aerosols, and its composition is principally N2, a small number of CO2, and metallic salt strong particles.
Aerosol fireplace extinguishing mechanism is as follows
System of endothermic cooling and hearth extinguishing
Metal salt particles take in a great deal of warmth at substantial temperatures, and endure physical endothermic processes which include thermal melting and gasification. The flame temperature is reduced and after that radiated to the combustible combustion floor for gasification of combustible molecules and vaporized combustible molecules. The warmth of pyrolysis of combustion molecules into absolutely free radicals will reduce, as well as combustion reaction speed are going to be suppressed to a certain extent.
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