Points You Have To Understand About Aerosol Fire Extinguishing
Exactly what is Aerosol fireplace extinguishing
What's aerosol hearth extinguisher? Aerosol fire extinguishing know-how is a new form of hearth extinguishing technological know-how formulated on the basis of army pyrotechnics.
The initial era of aerosol hearth extinguishing technologies was born in our state, also called smoke hearth extinguishing technological innovation, which started in the early nineteen sixties. It had been completed by scientific researchers in the Tianjin Hearth Study Institute of Community Security, who independently developed an computerized smoke fire extinguishing technique, which is mainly accustomed to extinguish fires in Class A, B, and C liquid storage tanks.
During the early eighties, With all the emergence of environmental protection issues of “halon fire extinguishing agent”, discovering alternate options to halon turned an important investigate matter.
At the conclusion of the nineteen eighties, Russian experts initial succeeded in studying aerosol fireplace extinguishing technological know-how which will extinguish fires in the submerged method, which opened up a whole new way for halon substitution investigate. Subsequently, aerosol hearth extinguishing engineering has attracted the eye on the Global Neighborhood, and countries like China, the United States, Australia, Malaysia and various nations have also started investigate on new aerosol fire extinguishing systems.
Generally speaking, aerosol is often a secure condition program shaped because of the dispersion of fine stable or liquid particles in the fuel. Professionally, it refers to some colloidal system that makes use of fuel (generally air) given that the dispersion medium and solid or liquid particles as the dispersant.Popular aerosols in character—clouds, smoke, fog, etc.The dimensions from the particles in aerosols is usually within the order of 10-5 to ten-1μm, which has gasoline fluidity and will diffuse about obstructions.
The medicament during the aerosol hearth suppression technique gadget is strong, as well as the element emitted from the medicament from the oxidation-reduction reaction is aerosol. The very first technology of aerosol fire extinguishing technologies-smoke fireplace extinguishing engineering.
K-form aerosol hearth extinguisher, also known as potassium salt hearth extinguishing technological know-how, is the second phase of the development of aerosol hearth extinguishing technological innovation, which commenced in the previous Soviet Union during the mid-nineteen sixties. Our place started off late In this particular regard, setting up in the early nineties.
In this kind of aerosol building agent, potassium nitrate is mainly utilized as the most crucial oxidant. Its sprays have superior hearth extinguishing effectiveness, but because they have a large amount of potassium ions, Simple to soak up dampness, forming a yellow and sticky solid alkaline conductive liquid film, this material is rather damaging to electronic devices, so K-sort aerosol automated fireplace extinguishing gadget can not be Utilized in electronic tools, precision devices and cultural relics Archive put. At present, the use available in the market is little by little lowering.
The 3rd-generation aerosol (S variety) is principally manufactured from strontium salt as the main oxidant. In contrast to the next-era potassium salt (K-kind) aerosol, strontium ions will not take in humidity, never type a conductive Alternative, and will not lead to damage to electrical machines. In 2001, China Cellular Communications Corporation chosen the strontium salt aerosol (S-kind aerosol automated fireplace extinguishing system) produced by the business immediately after stringent inspection and verification to safeguard its interaction foundation stations along with other locations Geared up with innovative Digital tools.
At the moment, strontium salt aerosol merchandise have already been used in A huge number of engineering projects, and also the third-era aerosol is becoming A growing number of acknowledged by people
Aerosol fire extinguisher application vary
a. Electrical fireplace
Communication space, conversation base station, electronic computer space, etc.;
Electrical fires in sites containing precision devices and equipment, for instance ability distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, etc.
b. Solid surface area fireplace
Floor fire of combustible solid elements in destinations where by combustible sound supplies are used or saved.
c. Liquid fire
Liquid fires in locations where diesel oil is made, utilised or saved (other than -35 diesel), major oil, transformer oil, animal and vegetable oil and various flammable liquids of Classification C; Prior to extinguishing a gas fire, the fuel resource could be Minimize off.
Aerosol fireplace suppression procedure application .
d. The S-form aerosol fire extinguishing unit can't be used to put out the next fires
①Substances which might be oxidized devoid of air, which include nitrocellulose, gunpowder, etc.; active metals, like potassium, sodium, magnesium, titanium, and so forth.; compounds that will decompose by themselves, such as sure peroxides, hydrazine, etcetera. Steel hydrides, which include potassium fluoride, sodium hydride, and many others. Purely natural substances, including phosphorus. Sturdy oxidants, including nitrogen oxide, fluorine, etc.
② Deep fire of combustible strong products.
③ Hearth in crowded areas, like theaters, auditoriums, etc.
④ Hearth in locations with explosion hazard, which include workshops with explosive dust.
⑤ Ultra-clear surroundings, for instance pharmaceutical workshops, chip processing areas, health care rooms, and so on.
Aerosol fireplace extinguishing Performing principle
The 4 components of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The hearth extinguishing system of fire extinguishing gasoline will be to get rid of one or various on the four features of combustion.
The good fireplace extinguishing agent in the S-kind aerosol fire extinguishing device is begun by energy, and it undergoes redox response to sort a large number of agglomerated hearth extinguishing aerosols, and its composition is mainly N2, a small quantity of CO2, and steel salt stable particles.
Aerosol fireplace extinguishing mechanism is as follows
System of endothermic cooling and fireplace extinguishing
Steel salt particles soak up a great deal of heat at higher temperatures, and go through Actual physical endothermic processes such as thermal melting and gasification. The flame temperature is decreased then radiated to the combustible combustion surface for gasification of combustible molecules and vaporized combustible molecules. The warmth of pyrolysis of combustion molecules into free radicals will decrease, along with the combustion reaction pace will probably be suppressed to a specific extent.
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