What exactly is Aerosol fireplace extinguishing
Exactly what is aerosol fire extinguisher? Aerosol hearth extinguishing technologies is a different variety of fire extinguishing technology designed on The premise of military services pyrotechnics.
The primary generation of aerosol fire extinguishing engineering was born inside our state, often called smoke hearth extinguishing technological know-how, which started during the early 1960s. It was finished by scientific researchers from your Tianjin Fireplace Exploration Institute of Community Security, who independently formulated an automated smoke fire extinguishing procedure, which is mainly utilized to extinguish fires at school A, B, and C liquid storage tanks.
While in the early nineteen eighties, Using the emergence of environmental defense troubles of “halon fire extinguishing agent”, acquiring alternate options to halon became an important exploration matter.
At the conclusion of the eighties, Russian scientists to start with succeeded in looking into aerosol fire extinguishing technology that may extinguish fires in the submerged method, which opened up a fresh way for halon substitution investigate. Subsequently, aerosol fireplace extinguishing technologies has attracted the eye on the Worldwide Group, and nations around the world which include China, the United States, Australia, Malaysia and also other international locations have also started exploration on new aerosol hearth extinguishing systems.
Generally speaking, aerosol can be a secure state procedure shaped because of the dispersion of fine reliable or liquid particles in a gasoline. Skillfully, it refers to the colloidal program that utilizes gasoline (normally air) as the dispersion medium and sound or liquid particles as the dispersant.Frequent aerosols in nature—clouds, smoke, fog, and many others.The dimensions in the particles in aerosols is mostly inside the get of ten-five to 10-1μm, which has gasoline fluidity and will diffuse all-around hurdles.
The medicament while in the aerosol fireplace suppression technique machine is strong, and also the part emitted because of the medicament with the oxidation-reduction response is aerosol. The primary technology of aerosol hearth extinguishing engineering-smoke hearth extinguishing know-how.
K-sort aerosol fire extinguisher, also referred to as potassium salt fireplace extinguishing technologies, is the second stage of the event of aerosol hearth extinguishing technologies, which started in the previous Soviet Union within the mid-nineteen sixties. Our nation began late With this regard, beginning during the early 1990s.
In this kind of aerosol producing agent, potassium nitrate is especially made use of as the most crucial oxidant. Its sprays have significant fireplace extinguishing effectiveness, but as they contain a large amount of potassium ions, Uncomplicated to absorb dampness, forming a yellow and sticky powerful alkaline conductive liquid film, this compound is extremely harming to Digital tools, so K-kind aerosol automated fire extinguishing product can not be used in Digital machines, precision devices and cultural relics Archive put. At present, the use in the market is step by step decreasing.
The 3rd-generation aerosol (S style) is especially manufactured from strontium salt as the key oxidant. In contrast to the 2nd-generation potassium salt (K-style) aerosol, strontium ions usually do not take up humidity, tend not to kind a conductive solution, and will likely not cause damage to electrical machines. In 2001, China Mobile Communications Company picked the strontium salt aerosol (S-style aerosol computerized hearth extinguishing system) made by the corporation right after stringent inspection and verification to protect its conversation base stations together with other areas Outfitted with complex electronic tools.
At present, strontium salt aerosol solutions are actually utilized in A large number of engineering assignments, as well as the 3rd-era aerosol has grown to be Increasingly more recognized by customers
Aerosol fireplace extinguisher application range
a. Electrical fireplace
Interaction room, conversation foundation station, Digital computer home, etc.;
Electrical fires in destinations made up of precision devices and products, for instance electrical power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and so forth.
b. Solid surface area fire
Surface fireplace of combustible solid components in destinations where by combustible stable resources are utilized or stored.
c. Liquid hearth
Liquid fires in locations in which diesel oil is generated, applied or saved (other than -35 diesel), weighty oil, transformer oil, animal and vegetable oil and other flammable liquids of Classification C; Prior to extinguishing a fuel fireplace, the fuel source could be Minimize off.
Aerosol hearth suppression technique software .
d. The S-sort aerosol fireplace extinguishing gadget can't be utilized to place out the next fires
①Substances that can be oxidized without having air, for instance nitrocellulose, gunpowder, and many others.; active metals, for instance potassium, sodium, magnesium, titanium, and many others.; compounds which can decompose by themselves, including specific peroxides, hydrazine, and many others. Steel hydrides, which include potassium fluoride, sodium hydride, and so forth. Purely natural substances, like phosphorus. Solid oxidants, which include nitrogen oxide, fluorine, and so on.
② Deep fire of combustible sound supplies.
③ Hearth in crowded destinations, which include theaters, auditoriums, etc.
④ Fireplace in spots with explosion hazard, for instance workshops with explosive dust.
⑤ Extremely-cleanse natural environment, for example pharmaceutical workshops, chip processing destinations, health care rooms, etcetera.
Aerosol fireplace extinguishing Doing the job principle
The four aspects of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The fire extinguishing system of fireplace extinguishing gas is to do away with 1 or various with the four features of combustion.
The sound fire extinguishing agent during the S-type aerosol fireplace extinguishing product is started off by electricity, and it undergoes redox reaction to variety numerous agglomerated fire extinguishing aerosols, and its composition is mainly N2, a little amount of CO2, and metallic salt solid particles.
Aerosol hearth extinguishing mechanism is as follows
System of endothermic cooling and fireplace extinguishing
Metal salt particles soak up a great deal of heat at large temperatures, and endure Bodily endothermic procedures like thermal melting and gasification. The flame temperature is reduced and afterwards radiated to the combustible combustion area for gasification of combustible molecules and vaporized combustible molecules. The heat of pyrolysis of combustion molecules into cost-free radicals will lessen, as well as the combustion reaction pace will likely be suppressed to a particular extent.
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