Exactly what is Aerosol fire extinguishing
What on earth is aerosol fireplace extinguisher? Aerosol fireplace extinguishing engineering is a fresh sort of fire extinguishing technological know-how developed on The premise of military services pyrotechnics.
The main era of aerosol fire extinguishing engineering was born in our nation, often known as smoke fire extinguishing technological know-how, which commenced while in the early 1960s. It absolutely was accomplished by scientific researchers in the Tianjin Fireplace Exploration Institute of Public Safety, who independently formulated an computerized smoke fireplace extinguishing program, which is mainly used to extinguish fires in Class A, B, and C liquid storage tanks.
While in the early 1980s, Using the emergence of environmental security problems of “halon fireplace extinguishing agent”, acquiring options to halon turned a very important research matter.
At the conclusion of the nineteen eighties, Russian experts initially succeeded in exploring aerosol hearth extinguishing technologies that may extinguish fires in a very submerged manner, which opened up a different way for halon substitution investigation. Subsequently, aerosol fireplace extinguishing technologies has attracted the eye of your international Neighborhood, and nations around the world for example China, The usa, Australia, Malaysia and various nations have also begun exploration on new aerosol fire extinguishing systems.
Most of the time, aerosol is actually a steady state method formed because of the dispersion of fine stable or liquid particles in the fuel. Professionally, it refers to your colloidal technique that uses gasoline (typically air) as the dispersion medium and strong or liquid particles given that the dispersant.Prevalent aerosols in character—clouds, smoke, fog, and many others.The dimensions of the particles in aerosols is generally inside the get of ten-5 to 10-oneμm, that has gasoline fluidity and may diffuse all-around obstructions.
The medicament in the aerosol fireplace suppression process gadget is sound, as well as the part emitted because of the medicament through the oxidation-reduction response is aerosol. The first generation of aerosol fireplace extinguishing know-how-smoke fire extinguishing technologies.
K-style aerosol hearth extinguisher, also called potassium salt fireplace extinguishing technological innovation, is the 2nd stage of the development of aerosol hearth extinguishing technological innovation, which commenced in the former Soviet Union while in the mid-sixties. Our place started out late On this regard, starting off inside the early nineteen nineties.
In such a aerosol generating agent, potassium nitrate is mainly made use of as the principle oxidant. Its sprays have higher fire extinguishing performance, but simply because they comprise a large amount of potassium ions, Easy to soak up moisture, forming a yellow and sticky sturdy alkaline conductive liquid movie, this compound is extremely damaging to Digital equipment, so K-type aerosol computerized fireplace extinguishing device can not be Utilized in Digital equipment, precision instruments and cultural relics Archive put. At this time, the use available in the market is step by step lowering.
The third-technology aerosol (S sort) is principally crafted from strontium salt as the leading oxidant. Contrary to the second-generation potassium salt (K-form) aerosol, strontium ions tend not to absorb moisture, don't variety a conductive Resolution, and won't cause harm to electrical equipment. In 2001, China Cell Communications Corporation chosen the strontium salt aerosol (S-kind aerosol automatic fireplace extinguishing system) made by the corporate after rigorous inspection and verification to safeguard its communication foundation stations and other destinations equipped with innovative Digital devices.
At present, strontium salt aerosol items are already utilized in A huge number of engineering jobs, as well as 3rd-era aerosol is now An increasing number of accepted by consumers
Aerosol fire extinguisher software assortment
a. Electrical hearth
Communication room, communication base station, electronic Laptop or computer room, etcetera.;
Electrical fires in locations that contains precision devices and gear, including energy distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and so forth.
b. Stable surface fireplace
Surface fireplace of combustible good materials in destinations the place combustible reliable resources are applied or stored.
c. Liquid hearth
Liquid fires in sites wherever diesel oil is generated, used or saved (except -35 diesel), weighty oil, transformer oil, animal and vegetable oil along with other flammable liquids of Group C; Just before extinguishing a gasoline hearth, the gas source could be Slash off.
Aerosol fireplace suppression process application .
d. The S-type aerosol hearth extinguishing unit cannot be used to put out the following fires
①Substances which can be oxidized with no air, for example nitrocellulose, gunpowder, etcetera.; Energetic metals, including potassium, sodium, magnesium, titanium, and so forth.; compounds that will decompose by by themselves, like certain peroxides, hydrazine, etcetera. Steel hydrides, including potassium fluoride, sodium hydride, and so on. Normal substances, for instance phosphorus. Potent oxidants, including nitrogen oxide, fluorine, and so forth.
② Deep fire of combustible reliable products.
③ Hearth in crowded sites, like theaters, auditoriums, and many others.
④ Fireplace in areas with explosion hazard, which include workshops with explosive dust.
⑤ Ultra-clean surroundings, for example pharmaceutical workshops, chip processing places, health-related rooms, and many others.
Aerosol fireplace extinguishing Functioning basic principle
The four aspects of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The fireplace extinguishing mechanism of fireplace extinguishing fuel should be to get rid of a single or numerous with the four things of combustion.
The reliable fireplace extinguishing agent while in the S-sort aerosol fireplace extinguishing device is began by electrical energy, and it undergoes redox response to form numerous agglomerated fire extinguishing aerosols, and its composition is especially N2, a little level of CO2, and metal salt strong particles.
Aerosol fire extinguishing mechanism is as follows
System of endothermic cooling and fire extinguishing
Metal salt particles absorb a great deal of heat at significant temperatures, and endure Actual physical endothermic processes which include thermal melting and gasification. The flame temperature is decreased and then radiated towards the combustible combustion surface for gasification of combustible molecules and vaporized combustible molecules. The heat of pyrolysis of combustion molecules into free of charge radicals will decrease, as well as the combustion reaction pace will likely be suppressed to a specific extent.
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