Precisely what is Aerosol hearth extinguishing
Exactly what is aerosol fireplace extinguisher? Aerosol hearth extinguishing know-how is a different style of fireplace extinguishing engineering produced on the basis of army pyrotechnics.
The very first era of aerosol hearth extinguishing technology was born within our region, also referred to as smoke hearth extinguishing technologies, which started in the early nineteen sixties. It absolutely was completed by scientific researchers in the Tianjin Fireplace Study Institute of General public Security, who independently produced an computerized smoke hearth extinguishing technique, which is principally utilized to extinguish fires in school A, B, and C liquid storage tanks.
During the early eighties, While using the emergence of environmental defense issues of “halon fire extinguishing agent”, getting choices to halon became a vital investigation matter.
At the end of the nineteen eighties, Russian scientists to start with succeeded in studying aerosol fire extinguishing engineering which will extinguish fires inside of a submerged manner, which opened up a whole new way for halon substitution analysis. Subsequently, aerosol hearth extinguishing know-how has attracted the eye in the Intercontinental Neighborhood, and nations such as China, America, Australia, Malaysia along with other nations have also started research on new aerosol fireplace extinguishing technologies.
Most of the time, aerosol can be a stable point out system shaped from the dispersion of fantastic solid or liquid particles within a fuel. Professionally, it refers to the colloidal procedure that works by using gasoline (commonly air) as the dispersion medium and solid or liquid particles given that the dispersant.Common aerosols in character—clouds, smoke, fog, and so forth.The scale of your particles in aerosols is usually within the purchase of 10-five to 10-1μm, that has gasoline fluidity and may diffuse about road blocks.
The medicament within the aerosol fireplace suppression program gadget is reliable, along with the part emitted with the medicament throughout the oxidation-reduction reaction is aerosol. The primary generation of aerosol hearth extinguishing know-how-smoke fireplace extinguishing technological innovation.
K-kind aerosol fireplace extinguisher, also referred to as potassium salt fire extinguishing engineering, is the 2nd phase of the development of aerosol fire extinguishing engineering, which started in the previous Soviet Union during the mid-1960s. Our state began late On this regard, starting up inside the early 1990s.
In this type of aerosol producing agent, potassium nitrate is especially employed as the leading oxidant. Its sprays have large hearth extinguishing efficiency, but simply because they have a large amount of potassium ions, Simple to soak up moisture, forming a yellow and sticky robust alkaline conductive liquid film, this substance is extremely harmful to Digital gear, so K-variety aerosol automatic hearth extinguishing product cannot be Employed in electronic gear, precision devices and cultural relics Archive place. At present, the use out there is gradually reducing.
The 3rd-generation aerosol (S sort) is principally manufactured from strontium salt as the principle oxidant. Compared with the second-generation potassium salt (K-kind) aerosol, strontium ions will not soak up dampness, do not type a conductive Alternative, and will not bring about damage to electrical products. In 2001, China Cell Communications Corporation chosen the strontium salt aerosol (S-sort aerosol automatic fireplace extinguishing product) made by the organization immediately after demanding inspection and verification to safeguard its communication base stations along with other places Geared up with refined electronic products.
At the moment, strontium salt aerosol goods are actually applied in 1000s of engineering jobs, and the 3rd-era aerosol has become A lot more recognized by users
Aerosol fire extinguisher application selection
a. Electrical fire
Interaction home, interaction foundation station, Digital Pc space, and so on.;
Electrical fires in sites made up of precision instruments and machines, like ability distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and many others.
b. Strong surface area hearth
Area fireplace of combustible sound components in places in which combustible reliable materials are employed or saved.
c. Liquid fire
Liquid fires in destinations wherever diesel oil is produced, utilized or saved (except -35 diesel), hefty oil, transformer oil, animal and vegetable oil and various flammable liquids of Category C; Just before extinguishing a fuel fire, the fuel supply could be Minimize off.
Aerosol hearth suppression process application .
d. The S-sort aerosol hearth extinguishing product cannot be accustomed to set out the following fires
①Substances which might be oxidized with out air, such as nitrocellulose, gunpowder, and so on.; Energetic metals, including potassium, sodium, magnesium, titanium, etc.; compounds that could decompose by them selves, like particular peroxides, hydrazine, etcetera. Steel hydrides, which include potassium fluoride, sodium hydride, and so on. Natural substances, like phosphorus. Powerful oxidants, for instance nitrogen oxide, fluorine, and so forth.
② Deep hearth of combustible sound elements.
③ Hearth in crowded places, which include theaters, auditoriums, etcetera.
④ Fire in destinations with explosion hazard, which include workshops with explosive dust.
⑤ Ultra-cleanse surroundings, for example pharmaceutical workshops, chip processing locations, professional medical rooms, etc.
Aerosol hearth extinguishing Operating principle
The 4 elements of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The fire extinguishing mechanism of hearth extinguishing gas is always to eradicate just one or many of your four factors of combustion.
The sound fire extinguishing agent inside the S-form aerosol fireplace extinguishing machine is started by electricity, and it undergoes redox response to variety a lot of agglomerated fire extinguishing aerosols, and its composition is mainly N2, a small quantity of CO2, and metal salt good particles.
Aerosol hearth extinguishing system is as follows
System of endothermic cooling and fire extinguishing
Metallic salt particles soak up a large amount of warmth at significant temperatures, and bear Bodily endothermic processes like thermal melting and gasification. The flame temperature is reduced and afterwards radiated towards the combustible combustion surface for gasification of combustible molecules and vaporized combustible molecules. The heat of pyrolysis of combustion molecules into free radicals will lower, and also the combustion response velocity is going to be suppressed to a certain extent.
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