Details It Is Important To Be Informed On Aerosol Fire Extinguishing
Details It Is Important To Be Informed On Aerosol Fire Extinguishing
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What's Aerosol hearth extinguishing
What on earth is aerosol hearth extinguisher? Aerosol fire extinguishing engineering is a fresh sort of fireplace extinguishing know-how produced on The premise of armed service pyrotechnics.
The initial technology of aerosol hearth extinguishing technology was born within our country, often called smoke fire extinguishing know-how, which began from the early 1960s. It had been done by scientific researchers within the Tianjin Fire Exploration Institute of Public Safety, who independently made an automatic smoke hearth extinguishing procedure, which is mainly accustomed to extinguish fires at school A, B, and C liquid storage tanks.
In the early 1980s, While using the emergence of environmental protection troubles of “halon fire extinguishing agent”, obtaining solutions to halon grew to become a very important research topic.
At the end of the 1980s, Russian experts first succeeded in studying aerosol hearth extinguishing know-how which will extinguish fires in a very submerged way, which opened up a different way for halon substitution exploration. Subsequently, aerosol hearth extinguishing technological know-how has captivated the eye with the Intercontinental Group, and nations around the world which include China, America, Australia, Malaysia and various nations around the world have also started investigation on new aerosol hearth extinguishing technologies.
Generally speaking, aerosol is a secure point out process shaped through the dispersion of fantastic strong or liquid particles in a fuel. Skillfully, it refers into a colloidal program that utilizes fuel (commonly air) since the dispersion medium and strong or liquid particles given that the dispersant.Common aerosols in nature—clouds, smoke, fog, and so on.The size from the particles in aerosols is generally during the order of ten-5 to ten-1μm, that has gas fluidity and might diffuse around obstructions.
The medicament within the aerosol fireplace suppression method machine is reliable, and the part emitted by the medicament throughout the oxidation-reduction response is aerosol. The initial technology of aerosol fire extinguishing know-how-smoke fireplace extinguishing know-how.
K-sort aerosol fireplace extinguisher, also called potassium salt fireplace extinguishing engineering, is the 2nd stage of the development of aerosol fireplace extinguishing engineering, which commenced in the former Soviet Union from the mid-1960s. Our region begun late On this regard, starting off inside the early nineties.
In such a aerosol creating agent, potassium nitrate is principally utilised as the main oxidant. Its sprays have large hearth extinguishing effectiveness, but as they contain a large amount of potassium ions, Uncomplicated to soak up humidity, forming a yellow and sticky potent alkaline conductive liquid movie, this compound is very damaging to Digital equipment, so K-kind aerosol automatic fire extinguishing gadget can not be used in electronic equipment, precision devices and cultural relics Archive location. At present, the use out there is slowly reducing.
The third-era aerosol (S variety) is principally fabricated from strontium salt as the leading oxidant. Compared with the 2nd-technology potassium salt (K-form) aerosol, strontium ions will not take in dampness, tend not to kind a conductive Remedy, and will never lead to damage to electrical gear. In 2001, China Mobile Communications Company chosen the strontium salt aerosol (S-variety aerosol automated fire extinguishing machine) made by the corporate soon after stringent inspection and verification to protect its communication foundation stations as well as other locations equipped with sophisticated Digital products.
At present, strontium salt aerosol products are actually utilized in A large number of engineering jobs, along with the 3rd-era aerosol has become Progressively more acknowledged by buyers
Aerosol hearth extinguisher software variety
a. Electrical fireplace
Communication place, conversation base station, electronic computer area, etc.;
Electrical fires in spots made up of precision instruments and devices, like electric power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, etc.
b. Good surface area hearth
Surface hearth of combustible stable supplies in destinations exactly where combustible reliable materials are utilised or saved.
c. Liquid fire
Liquid fires in areas wherever diesel oil is created, utilised or saved (apart from -35 diesel), large oil, transformer oil, animal and vegetable oil together with other flammable liquids of Category C; Just before extinguishing a gasoline fireplace, the fuel resource may be Minimize off.
Aerosol fireplace suppression procedure application .
d. The S-kind aerosol hearth extinguishing system can not be utilized to put out the following fires
1. Substances that may be oxidized devoid of air, like nitrocellulose, gunpowder, and many others.; active metals, like potassium, sodium, magnesium, titanium, and so on.; compounds that will decompose by by themselves, for example selected peroxides, hydrazine, etcetera. Metallic hydrides, such as potassium fluoride, sodium hydride, and so on. Organic substances, including phosphorus. Robust oxidants, including nitrogen oxide, fluorine, and so on.
2. Deep fire of combustible solid products.
3. Fireplace in crowded sites, which include theaters, auditoriums, etcetera.
4. Hearth in areas with explosion hazard, like workshops with explosive dust.
5. Ultra-clean up natural environment, including pharmaceutical workshops, chip processing locations, medical rooms, etcetera.
Aerosol fireplace extinguishing Doing work principle
The 4 things of combustion: combustibles, oxidizer, temperature and uninhibited chain reaction. The hearth extinguishing system of fire extinguishing fuel will be to eradicate 1 or quite a few with the four features of combustion.
The reliable fire extinguishing agent during the S-variety aerosol fire extinguishing product is commenced by electricity, and it undergoes redox response to type numerous agglomerated fire extinguishing aerosols, and its composition is especially N2, a small number of CO2, and metal salt good particles.
Aerosol fire extinguishing system is as follows
Mechanism of endothermic cooling and hearth extinguishing
Metallic salt particles soak up a great deal of heat at significant temperatures, and endure Bodily endothermic procedures including thermal melting and gasification. The flame temperature is decreased after which radiated into the combustible combustion surface area for gasification of combustible molecules and vaporized combustible molecules. The warmth of pyrolysis of combustion molecules into free radicals will lower, and the combustion reaction pace will be suppressed to a certain extent.
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