Points It's Essential To Find Out About Aerosol Fire Extinguishing
Exactly what is Aerosol hearth extinguishing
Precisely what is aerosol fireplace extinguisher? Aerosol hearth extinguishing technological innovation is a completely new style of fire extinguishing technological know-how created on The idea of army pyrotechnics.
The 1st generation of aerosol hearth extinguishing know-how was born in our country, generally known as smoke fireplace extinguishing technological innovation, which commenced inside the early nineteen sixties. It was completed by scientific researchers through the Tianjin Fire Investigate Institute of General public Security, who independently made an automatic smoke fire extinguishing method, which is principally accustomed to extinguish fires at school A, B, and C liquid storage tanks.
Within the early eighties, with the emergence of environmental defense problems of “halon hearth extinguishing agent”, getting alternate options to halon turned an important study subject.
At the end of the nineteen eighties, Russian experts to start with succeeded in researching aerosol fire extinguishing technology that will extinguish fires in a submerged way, which opened up a new way for halon substitution analysis. Subsequently, aerosol fire extinguishing technological know-how has captivated the eye in the Global Local community, and countries such as China, America, Australia, Malaysia and various nations around the world have also started exploration on new aerosol fire extinguishing systems.
In most cases, aerosol is actually a secure state technique shaped because of the dispersion of fine reliable or liquid particles in the gasoline. Professionally, it refers into a colloidal program that makes use of gasoline (usually air) given that the dispersion medium and solid or liquid particles given that the dispersant.Widespread aerosols in nature—clouds, smoke, fog, and so on.The scale on the particles in aerosols is mostly within the buy of 10-5 to 10-1μm, that has fuel fluidity and will diffuse about hurdles.
The medicament inside the aerosol fireplace suppression system gadget is solid, as well as the ingredient emitted because of the medicament throughout the oxidation-reduction response is aerosol. The 1st technology of aerosol fireplace extinguishing technologies-smoke hearth extinguishing engineering.
K-variety aerosol hearth extinguisher, also called potassium salt fireplace extinguishing know-how, is the 2nd phase of the event of aerosol hearth extinguishing technologies, which started in the former Soviet Union inside the mid-1960s. Our region commenced late With this regard, beginning from the early nineties.
In such a aerosol generating agent, potassium nitrate is mainly utilised as the primary oxidant. Its sprays have substantial hearth extinguishing performance, but given that they contain a great deal of potassium ions, Easy to absorb humidity, forming a yellow and sticky strong alkaline conductive liquid movie, this material is quite harmful to Digital equipment, so K-type aerosol automated fireplace extinguishing system can not be Employed in electronic machines, precision devices and cultural relics Archive location. At the moment, the use out there is steadily reducing.
The third-technology aerosol (S variety) is mainly fabricated from strontium salt as the main oxidant. Compared with the 2nd-era potassium salt (K-variety) aerosol, strontium ions will not take up dampness, will not variety a conductive Answer, and will not likely bring about damage to electrical gear. In 2001, China Mobile Communications Company selected the strontium salt aerosol (S-variety aerosol automatic fire extinguishing gadget) produced by the corporation following rigid inspection and verification to protect its communication base stations as well as other places Outfitted with complex electronic products.
At this time, strontium salt aerosol products and solutions have already been applied in Countless engineering assignments, and also the third-generation aerosol has become more and more approved by users
Aerosol fireplace extinguisher software range
a. Electrical hearth
Interaction space, communication base station, Digital Computer system place, and so forth.;
Electrical fires in sites that contains precision devices and gear, for example energy distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, etcetera.
b. Reliable floor hearth
Area fire of combustible solid resources in locations where by combustible solid materials are made use of or stored.
c. Liquid hearth
Liquid fires in places the place diesel oil is generated, made use of or stored (apart from -35 diesel), heavy oil, transformer oil, animal and vegetable oil and also other flammable liquids of Group C; Before extinguishing a fuel hearth, the gas resource is usually Lower off.
Aerosol fireplace suppression system application .
d. The S-style aerosol fireplace extinguishing product can't be accustomed to place out the following fires
①Substances that may be oxidized without the need of air, including nitrocellulose, gunpowder, etc.; Lively metals, for example potassium, sodium, magnesium, titanium, and many others.; compounds which will decompose by by themselves, like specific peroxides, hydrazine, etcetera. Metallic hydrides, like potassium fluoride, sodium hydride, etcetera. Organic substances, which include phosphorus. Solid oxidants, such as nitrogen oxide, fluorine, etc.
② Deep fireplace of combustible strong supplies.
③ Fireplace in crowded places, for instance theaters, auditoriums, etcetera.
④ Hearth in places with explosion hazard, for instance workshops with explosive dust.
⑤ Ultra-clean up ecosystem, such as pharmaceutical workshops, chip processing spots, medical rooms, and so forth.
Aerosol fire extinguishing Performing basic principle
The 4 factors of combustion: combustibles, oxidizer, temperature and uninhibited chain reaction. The fireplace extinguishing mechanism of hearth extinguishing gasoline is to reduce 1 or quite a few of the 4 things of combustion.
The reliable fireplace extinguishing agent inside the S-variety aerosol fire extinguishing device is started out by electricity, and it undergoes redox reaction to sort a lot of agglomerated fireplace extinguishing aerosols, and its composition is mainly N2, a small quantity of CO2, and metal salt sound particles.
Aerosol fire extinguishing mechanism is as follows
Mechanism of endothermic cooling and hearth extinguishing
Steel salt particles soak up a great deal of warmth at substantial temperatures, and go through physical endothermic processes which include thermal melting and gasification. The flame temperature is lowered and afterwards radiated towards the combustible combustion floor for gasification of combustible molecules and vaporized combustible molecules. The warmth of pyrolysis of combustion molecules into absolutely free radicals will minimize, and the combustion reaction velocity will be suppressed to a certain extent.
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