What on earth is Aerosol hearth extinguishing
What on earth is aerosol hearth extinguisher? Aerosol hearth extinguishing know-how is a fresh kind of fireplace extinguishing engineering produced on The premise of armed forces pyrotechnics.
The main technology of aerosol fire extinguishing engineering was born inside our nation, also known as smoke fire extinguishing engineering, which commenced in the early sixties. It absolutely was completed by scientific researchers within the Tianjin Fireplace Exploration Institute of General public Safety, who independently made an automated smoke fireplace extinguishing procedure, which is especially accustomed to extinguish fires in school A, B, and C liquid storage tanks.
From the early eighties, Together with the emergence of environmental safety issues of “halon fireplace extinguishing agent”, finding solutions to halon became a very important exploration topic.
At the conclusion of the 1980s, Russian scientists to start with succeeded in researching aerosol hearth extinguishing technological know-how that will extinguish fires in a submerged way, which opened up a different way for halon substitution investigate. Subsequently, aerosol fire extinguishing technologies has attracted the attention of your Intercontinental Local community, and international locations for instance China, The usa, Australia, Malaysia and also other countries have also begun research on new aerosol fireplace extinguishing technologies.
Generally speaking, aerosol is often a secure condition method formed by the dispersion of fine strong or liquid particles in a very gas. Skillfully, it refers to some colloidal method that uses gas (ordinarily air) since the dispersion medium and sound or liquid particles as the dispersant.Typical aerosols in mother nature—clouds, smoke, fog, and many others.The dimensions from the particles in aerosols is mostly within the get of 10-5 to ten-oneμm, that has gas fluidity and will diffuse around obstacles.
The medicament in the aerosol fire suppression system unit is sound, as well as the ingredient emitted because of the medicament in the oxidation-reduction response is aerosol. The very first generation of aerosol fireplace extinguishing technological know-how-smoke fireplace extinguishing technological know-how.
K-type aerosol fireplace extinguisher, also called potassium salt fire extinguishing know-how, is the next stage of the event of aerosol hearth extinguishing engineering, which commenced in the previous Soviet Union during the mid-1960s. Our nation began late Within this regard, starting during the early nineteen nineties.
In such a aerosol building agent, potassium nitrate is mainly employed as the primary oxidant. Its sprays have superior fireplace extinguishing performance, but because they have a large amount of potassium ions, Effortless to soak up humidity, forming a yellow and sticky robust alkaline conductive liquid film, this material is quite damaging to electronic devices, so K-style aerosol automatic fireplace extinguishing gadget can not be Employed in electronic machines, precision devices and cultural relics Archive area. At the moment, the use on the market is little by little reducing.
The third-era aerosol (S sort) is especially product of strontium salt as the principle oxidant. Contrary to the 2nd-technology potassium salt (K-style) aerosol, strontium ions tend not to take up humidity, usually do not kind a conductive Resolution, and will likely not trigger damage to electrical tools. In 2001, China Cell Communications Corporation selected the strontium salt aerosol (S-variety aerosol automated fireplace extinguishing product) made by the corporation right after stringent inspection and verification to safeguard its interaction foundation stations as well as other spots equipped with subtle Digital devices.
At present, strontium salt aerosol merchandise are actually utilized in Countless engineering projects, as well as third-technology aerosol happens to be Increasingly more accepted by customers
Aerosol fire extinguisher application selection
a. Electrical fireplace
Communication place, communication foundation station, Digital computer home, etcetera.;
Electrical fires in places containing precision instruments and gear, which include power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and many others.
b. Sound area fireplace
Surface hearth of combustible reliable components in places exactly where combustible strong supplies are used or stored.
c. Liquid fireplace
Liquid fires in sites where diesel oil is manufactured, employed or saved (other than -35 diesel), weighty oil, transformer oil, animal and vegetable oil together with other flammable liquids of Category C; Prior to extinguishing a gasoline fireplace, the fuel source may be Slash off.
Aerosol fire suppression technique software .
d. The S-variety aerosol hearth extinguishing machine cannot be accustomed to place out the subsequent fires
①Substances that can be oxidized without air, which include nitrocellulose, gunpowder, and so on.; active metals, such as potassium, sodium, magnesium, titanium, etc.; compounds which will decompose by by themselves, for instance certain peroxides, hydrazine, and so forth. Metal hydrides, for example potassium fluoride, sodium hydride, and so forth. All-natural substances, such as phosphorus. Powerful oxidants, for instance nitrogen oxide, fluorine, etc.
② Deep fire of combustible sound materials.
③ Fireplace in crowded areas, for example theaters, auditoriums, etc.
④ Fireplace in places with explosion hazard, including workshops with explosive dust.
⑤ Extremely-cleanse ecosystem, for example pharmaceutical workshops, chip processing places, clinical rooms, etcetera.
Aerosol fireplace extinguishing Doing work theory
The 4 features of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The fire extinguishing mechanism of hearth extinguishing gas is usually to remove 1 or many with the four elements of combustion.
The stable hearth extinguishing agent from the S-type aerosol hearth extinguishing machine is commenced by electrical power, and it undergoes redox reaction to variety a large number of agglomerated fire extinguishing aerosols, and its composition is principally N2, a little degree of CO2, and metallic salt reliable particles.
Aerosol hearth extinguishing system is as follows
System of endothermic cooling and fire extinguishing
Steel salt particles soak up a great deal of heat at superior temperatures, and undergo Bodily endothermic processes including thermal melting and gasification. The flame temperature is decreased after which radiated to the combustible combustion floor for gasification of combustible molecules and vaporized combustible molecules. The warmth of pyrolysis of combustion molecules into no cost radicals will decrease, and the combustion reaction pace will probably be suppressed to a particular extent.
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