Specifics You Should Be Informed About Aerosol Fire Extinguishing
What exactly is Aerosol hearth extinguishing
Precisely what is aerosol fire extinguisher? Aerosol fireplace extinguishing engineering is a fresh form of fireplace extinguishing technologies made on the basis of navy pyrotechnics.
The first generation of aerosol fireplace extinguishing engineering was born inside our region, often called smoke hearth extinguishing engineering, which began inside the early nineteen sixties. It had been concluded by scientific researchers from the Tianjin Fire Investigate Institute of Public Protection, who independently developed an automatic smoke fire extinguishing method, which is especially used to extinguish fires in school A, B, and C liquid storage tanks.
Inside the early 1980s, Along with the emergence of environmental protection problems of “halon hearth extinguishing agent”, locating alternate options to halon grew to become a vital analysis subject.
At the conclusion of the 1980s, Russian scientists initially succeeded in exploring aerosol hearth extinguishing technology which can extinguish fires in a very submerged manner, which opened up a new way for halon substitution investigation. Subsequently, aerosol hearth extinguishing technologies has attracted the eye with the international Neighborhood, and nations around the world which include China, the United States, Australia, Malaysia and also other nations have also begun investigate on new aerosol fire extinguishing systems.
In most cases, aerosol can be a steady state system shaped because of the dispersion of great solid or liquid particles inside a gas. Professionally, it refers to the colloidal program that utilizes gas (typically air) since the dispersion medium and reliable or liquid particles as being the dispersant.Frequent aerosols in mother nature—clouds, smoke, fog, etc.The dimensions with the particles in aerosols is mostly within the get of ten-five to ten-1μm, which has fuel fluidity and will diffuse all-around hurdles.
The medicament during the aerosol fire suppression method product is good, along with the element emitted from the medicament with the oxidation-reduction response is aerosol. The initial era of aerosol hearth extinguishing engineering-smoke hearth extinguishing know-how.
K-sort aerosol hearth extinguisher, also referred to as potassium salt fire extinguishing engineering, is the next stage of the development of aerosol hearth extinguishing technologies, which commenced in the previous Soviet Union within the mid-1960s. Our country started off late With this regard, starting off from the early nineteen nineties.
In this sort of aerosol building agent, potassium nitrate is especially employed as the most crucial oxidant. Its sprays have superior fire extinguishing performance, but mainly because they incorporate a large amount of potassium ions, Effortless to absorb moisture, forming a yellow and sticky solid alkaline conductive liquid movie, this material is very damaging to electronic tools, so K-type aerosol computerized hearth extinguishing gadget cannot be Utilized in Digital equipment, precision devices and cultural relics Archive position. At present, the use on the market is steadily decreasing.
The third-generation aerosol (S form) is especially fabricated from strontium salt as the main oxidant. Unlike the second-generation potassium salt (K-variety) aerosol, strontium ions don't soak up dampness, don't variety a conductive solution, and will not likely induce harm to electrical devices. In 2001, China Cell Communications Corporation picked the strontium salt aerosol (S-form aerosol automated fire extinguishing system) produced by the organization following stringent inspection and verification to shield its interaction base stations and various sites equipped with refined Digital machines.
At present, strontium salt aerosol goods have been applied in Countless engineering assignments, and the third-generation aerosol has become more and more recognized by users
Aerosol fire extinguisher software array
a. Electrical fire
Communication room, conversation base station, electronic computer place, and many others.;
Electrical fires in spots that contains precision instruments and devices, for instance electric power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and so on.
b. Reliable floor hearth
Area hearth of combustible stable supplies in destinations where combustible stable resources are used or saved.
c. Liquid fire
Liquid fires in spots where diesel oil is generated, made use of or stored (besides -35 diesel), major oil, transformer oil, animal and vegetable oil and other flammable liquids of Classification C; Ahead of extinguishing a fuel fireplace, the fuel supply could be Minimize off.
Aerosol fireplace suppression program application .
d. The S-type aerosol fireplace extinguishing unit can't be accustomed to put out the next fires
①Substances that can be oxidized with out air, for instance nitrocellulose, gunpowder, etc.; active metals, like potassium, sodium, magnesium, titanium, etc.; compounds that could decompose by them selves, for instance selected peroxides, hydrazine, and so on. Metallic hydrides, including potassium fluoride, sodium hydride, and many others. Pure substances, for instance phosphorus. Strong oxidants, such as nitrogen oxide, fluorine, and many others.
② Deep fireplace of combustible strong components.
③ Fireplace in crowded spots, such as theaters, auditoriums, etc.
④ Fire in places with explosion hazard, for instance workshops with explosive dust.
⑤ Extremely-cleanse setting, for instance pharmaceutical workshops, chip processing spots, medical rooms, etcetera.
Aerosol fire extinguishing working basic principle
The 4 elements of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The fire extinguishing mechanism of fireplace extinguishing fuel would be to do away with 1 or various in the four things of combustion.
The reliable hearth extinguishing agent inside the S-style aerosol fireplace extinguishing gadget is begun by electrical power, and it undergoes redox response to variety a large number of agglomerated hearth extinguishing aerosols, and its composition is mainly N2, a little volume of CO2, and metal salt reliable particles.
Aerosol fire extinguishing system is as follows
Mechanism of endothermic cooling and fire extinguishing
Metal salt particles take in a large amount of warmth at superior temperatures, and endure physical endothermic processes like thermal melting and gasification. The flame temperature is lowered after which radiated for the combustible combustion area for gasification of combustible molecules and vaporized combustible molecules. The warmth of pyrolysis of combustion molecules into cost-free radicals will reduce, and also the combustion response pace is going to be suppressed to a certain extent.
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