What's Aerosol fireplace extinguishing
Exactly what is aerosol fireplace extinguisher? Aerosol fire extinguishing know-how is a brand new style of fire extinguishing know-how made on The premise of army pyrotechnics.
The 1st generation of aerosol fire extinguishing know-how was born in our state, also known as smoke fireplace extinguishing engineering, which commenced from the early nineteen sixties. It absolutely was concluded by scientific researchers from your Tianjin Hearth Exploration Institute of Community Protection, who independently designed an automated smoke fireplace extinguishing technique, which is mainly utilized to extinguish fires at school A, B, and C liquid storage tanks.
Within the early 1980s, Together with the emergence of environmental protection problems of “halon fireplace extinguishing agent”, getting possibilities to halon became a vital study subject.
At the conclusion of the 1980s, Russian experts 1st succeeded in exploring aerosol fireplace extinguishing technologies which can extinguish fires within a submerged fashion, which opened up a completely new way for halon substitution analysis. Subsequently, aerosol fire extinguishing technology has attracted the attention on the Global Neighborhood, and countries such as China, The usa, Australia, Malaysia together with other countries have also started study on new aerosol fire extinguishing technologies.
Most of the time, aerosol is really a steady state procedure formed via the dispersion of great reliable or liquid particles within a gasoline. Professionally, it refers into a colloidal system that employs gas (normally air) as being the dispersion medium and strong or liquid particles as being the dispersant.Popular aerosols in nature—clouds, smoke, fog, and so forth.The dimensions with the particles in aerosols is generally from the order of ten-5 to ten-1μm, which has gasoline fluidity and will diffuse all over hurdles.
The medicament while in the aerosol fireplace suppression technique unit is reliable, and also the element emitted because of the medicament throughout the oxidation-reduction response is aerosol. The primary technology of aerosol fire extinguishing know-how-smoke fireplace extinguishing technological innovation.
K-kind aerosol hearth extinguisher, also known as potassium salt hearth extinguishing engineering, is the next stage of the event of aerosol fire extinguishing technological know-how, which began in the former Soviet Union while in the mid-sixties. Our region started out late With this regard, beginning from the early nineteen nineties.
In this kind of aerosol producing agent, potassium nitrate is especially employed as the primary oxidant. Its sprays have large fire extinguishing performance, but given that they consist of a large amount of potassium ions, Easy to soak up humidity, forming a yellow and sticky solid alkaline conductive liquid film, this compound is incredibly harmful to electronic products, so K-form aerosol automatic fireplace extinguishing unit can't be used in electronic products, precision instruments and cultural relics Archive location. At this time, the use on the market is little by little lowering.
The 3rd-technology aerosol (S variety) is mainly crafted from strontium salt as the most crucial oxidant. Not like the 2nd-era potassium salt (K-kind) aerosol, strontium ions tend not to absorb dampness, will not form a conductive Resolution, and will never induce damage to electrical equipment. In 2001, China Cell Communications Company selected the strontium salt aerosol (S-type aerosol computerized fire extinguishing gadget) made by the organization soon after rigid inspection and verification to safeguard its conversation foundation stations and also other sites Outfitted with complex Digital tools.
At this time, strontium salt aerosol merchandise are already applied in Many engineering projects, and the third-era aerosol happens to be An increasing number of acknowledged by users
Aerosol fireplace extinguisher software range
a. Electrical fire
Communication place, conversation foundation station, electronic Personal computer space, and so on.;
Electrical fires in spots that contains precision devices and products, such as energy distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and so on.
b. Reliable surface area fire
Surface area hearth of combustible reliable elements in places wherever combustible good elements are employed or saved.
c. Liquid fire
Liquid fires in destinations exactly where diesel oil is generated, made use of or stored (other than -35 diesel), major oil, transformer oil, animal and vegetable oil and various flammable liquids of Group C; Prior to extinguishing a gas hearth, the gas resource could be Reduce off.
Aerosol hearth suppression process software .
d. The S-form aerosol fire extinguishing gadget can't be utilized to set out the subsequent fires
①Substances which can be oxidized without air, for example nitrocellulose, gunpowder, and so forth.; Lively metals, which include potassium, sodium, magnesium, titanium, etcetera.; compounds that may decompose by them selves, like specified peroxides, hydrazine, etc. Steel hydrides, for instance potassium fluoride, sodium hydride, and so on. Pure substances, for example phosphorus. Solid oxidants, which include nitrogen oxide, fluorine, and many others.
② Deep fireplace of combustible solid supplies.
③ Fireplace in crowded areas, such as theaters, auditoriums, and many others.
④ Fireplace in sites with explosion hazard, including workshops with explosive dust.
⑤ Extremely-clear surroundings, including pharmaceutical workshops, chip processing spots, health-related rooms, etc.
Aerosol hearth extinguishing Doing the job theory
The four factors of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The hearth extinguishing system of fire extinguishing fuel is to reduce a single or numerous in the 4 aspects of combustion.
The stable fireplace extinguishing agent while in the S-variety aerosol fireplace extinguishing product is began by electricity, and it undergoes redox reaction to kind numerous agglomerated fire extinguishing aerosols, and its composition is especially N2, a small volume of CO2, and metal salt good particles.
Aerosol hearth extinguishing mechanism is as follows
System of endothermic cooling and fire extinguishing
Metallic salt particles take up a large amount of warmth at significant temperatures, and undertake Actual physical endothermic procedures such as thermal melting and gasification. The flame temperature is decreased and afterwards radiated to your combustible combustion floor for gasification of combustible molecules and vaporized combustible molecules. The warmth of pyrolysis of combustion molecules into free of charge radicals will minimize, along with the combustion reaction velocity are going to be suppressed to a specific extent.
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