What exactly is Aerosol hearth extinguishing
What's aerosol fireplace extinguisher? Aerosol fire extinguishing know-how is a whole new kind of hearth extinguishing technology created on The premise of armed forces pyrotechnics.
The 1st technology of aerosol fire extinguishing technological innovation was born inside our nation, also called smoke fireplace extinguishing technology, which began in the early nineteen sixties. It was concluded by scientific scientists in the Tianjin Fireplace Study Institute of General public Protection, who independently created an computerized smoke fire extinguishing process, which is especially used to extinguish fires in Class A, B, and C liquid storage tanks.
While in the early 1980s, with the emergence of environmental defense problems of “halon fire extinguishing agent”, finding alternate options to halon turned a significant research subject.
At the conclusion of the 1980s, Russian scientists to start with succeeded in looking into aerosol fire extinguishing technology that could extinguish fires inside of a submerged manner, which opened up a completely new way for halon substitution study. Subsequently, aerosol fireplace extinguishing technological innovation has attracted the attention on the Global Local community, and countries which include China, America, Australia, Malaysia and other countries have also begun study on new aerosol hearth extinguishing technologies.
Most of the time, aerosol is a steady condition method shaped via the dispersion of wonderful sound or liquid particles in a very gas. Skillfully, it refers into a colloidal method that employs fuel (ordinarily air) given that the dispersion medium and sound or liquid particles as being the dispersant.Common aerosols in character—clouds, smoke, fog, and many others.The scale in the particles in aerosols is usually inside the order of ten-5 to ten-1μm, which has gasoline fluidity and will diffuse all over obstacles.
The medicament while in the aerosol fireplace suppression program machine is good, as well as the component emitted by the medicament from the oxidation-reduction reaction is aerosol. The first era of aerosol fireplace extinguishing know-how-smoke fireplace extinguishing technologies.
K-form aerosol fireplace extinguisher, also known as potassium salt fireplace extinguishing technology, is the 2nd phase of the development of aerosol fireplace extinguishing know-how, which began in the previous Soviet Union in the mid-sixties. Our state started late In this particular regard, starting up from the early 1990s.
In such a aerosol generating agent, potassium nitrate is principally applied as the leading oxidant. Its sprays have substantial fire extinguishing effectiveness, but simply because they consist of a large amount of potassium ions, Uncomplicated to absorb moisture, forming a yellow and sticky powerful alkaline conductive liquid film, this compound is quite detrimental to Digital equipment, so K-form aerosol automated fire extinguishing system cannot be used in Digital products, precision instruments and cultural relics Archive area. At present, the use on the market is progressively decreasing.
The 3rd-era aerosol (S type) is especially crafted from strontium salt as the most crucial oxidant. Unlike the 2nd-technology potassium salt (K-style) aerosol, strontium ions never soak up moisture, usually do not form a conductive Option, and will likely not lead to harm to electrical equipment. In 2001, China Cell Communications Company chosen the strontium salt aerosol (S-sort aerosol automated fire extinguishing product) produced by the business immediately after stringent inspection and verification to safeguard its interaction base stations and also other sites Outfitted with refined Digital gear.
At this time, strontium salt aerosol products and solutions happen to be used in 1000s of engineering jobs, and the third-technology aerosol is becoming A growing number of recognized by users
Aerosol hearth extinguisher software assortment
a. Electrical fireplace
Interaction space, conversation foundation station, electronic Pc home, etcetera.;
Electrical fires in places made up of precision devices and equipment, such as electric power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, etc.
b. Reliable area fireplace
Surface area fire of combustible solid elements in sites where combustible sound products are utilized or saved.
c. Liquid hearth
Liquid fires in destinations where by diesel oil is created, utilised or saved (other than -35 diesel), hefty oil, transformer oil, animal and vegetable oil together with other flammable liquids of Classification C; Prior to extinguishing a gas fireplace, the gas resource may be Lower off.
Aerosol fireplace suppression method application .
d. The S-type aerosol hearth extinguishing machine can not be accustomed to place out the subsequent fires
①Substances which can be oxidized without having air, which include nitrocellulose, gunpowder, etcetera.; Lively metals, like potassium, sodium, magnesium, titanium, etcetera.; compounds which will decompose by on their own, like selected peroxides, hydrazine, and many others. Steel hydrides, for example potassium fluoride, sodium hydride, etcetera. Natural substances, including phosphorus. Solid oxidants, like nitrogen oxide, fluorine, etcetera.
② Deep fireplace of combustible reliable supplies.
③ Fireplace in crowded places, like theaters, auditoriums, and so on.
④ Hearth in destinations with explosion hazard, like workshops with explosive dust.
⑤ Extremely-clear setting, which include pharmaceutical workshops, chip processing destinations, medical rooms, and so on.
Aerosol hearth extinguishing Functioning theory
The 4 factors of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The hearth extinguishing system of hearth extinguishing fuel is usually to do away with a person or a number of of your four elements of combustion.
The strong fire extinguishing agent in the S-style aerosol fire extinguishing product is started by electric power, and it undergoes redox response to kind a lot of agglomerated fireplace extinguishing aerosols, and its composition is principally N2, a little volume of CO2, and metallic salt sound particles.
Aerosol fireplace extinguishing mechanism is as follows
Mechanism of endothermic cooling and fireplace extinguishing
Steel salt particles take in a great deal of heat at substantial temperatures, and bear Bodily endothermic procedures including thermal melting and gasification. The flame temperature is lowered and then radiated towards the combustible combustion surface area for gasification of combustible molecules and vaporized combustible molecules. The heat of pyrolysis of combustion molecules into absolutely free radicals will lessen, as well as the combustion reaction pace will be suppressed to a particular extent.
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