Exactly what is Aerosol fireplace extinguishing
What is aerosol hearth extinguisher? Aerosol fireplace extinguishing technologies is a completely new sort of hearth extinguishing technological know-how formulated on The premise of army pyrotechnics.
The initial generation of aerosol fire extinguishing know-how was born in our region, often called smoke hearth extinguishing engineering, which commenced from the early 1960s. It absolutely was finished by scientific scientists from your Tianjin Fireplace Study Institute of Community Security, who independently designed an automatic smoke hearth extinguishing technique, which is principally utilized to extinguish fires in school A, B, and C liquid storage tanks.
From the early 1980s, Together with the emergence of environmental defense challenges of “halon fire extinguishing agent”, locating possibilities to halon became a significant investigation matter.
At the end of the 1980s, Russian researchers first succeeded in researching aerosol hearth extinguishing technology that could extinguish fires within a submerged way, which opened up a completely new way for halon substitution investigate. Subsequently, aerosol hearth extinguishing know-how has captivated the attention of the international Group, and nations around the world which include China, America, Australia, Malaysia and also other nations around the world have also begun investigation on new aerosol fire extinguishing technologies.
In most cases, aerosol is really a steady state procedure formed through the dispersion of fantastic strong or liquid particles in a fuel. Professionally, it refers to some colloidal technique that uses fuel (normally air) as the dispersion medium and reliable or liquid particles given that the dispersant.Popular aerosols in character—clouds, smoke, fog, and so forth.The dimensions of your particles in aerosols is usually while in the purchase of ten-five to ten-1μm, which has fuel fluidity and can diffuse about obstacles.
The medicament while in the aerosol fireplace suppression procedure gadget is strong, along with the component emitted from the medicament throughout the oxidation-reduction reaction is aerosol. The first technology of aerosol hearth extinguishing engineering-smoke hearth extinguishing engineering.
K-kind aerosol hearth extinguisher, also referred to as potassium salt fire extinguishing technologies, is the second stage of the development of aerosol fire extinguishing technologies, which began in the former Soviet Union from the mid-sixties. Our state started off late Within this regard, starting while in the early 1990s.
In this type of aerosol building agent, potassium nitrate is mainly utilised as the primary oxidant. Its sprays have high fire extinguishing effectiveness, but because they contain a large amount of potassium ions, Straightforward to soak up dampness, forming a yellow and sticky sturdy alkaline conductive liquid movie, this material is very harming to Digital products, so K-variety aerosol automatic hearth extinguishing system can not be used in electronic devices, precision instruments and cultural relics Archive location. At the moment, the use available in the market is progressively decreasing.
The third-technology aerosol (S sort) is mainly crafted from strontium salt as the leading oxidant. Not like the 2nd-technology potassium salt (K-kind) aerosol, strontium ions tend not to take up humidity, do not variety a conductive Answer, and will never lead to harm to electrical machines. In 2001, China Cell Communications Company selected the strontium salt aerosol (S-variety aerosol computerized fire extinguishing system) made by the corporate right after rigid inspection and verification to protect its communication base stations and also other locations Outfitted with sophisticated Digital tools.
At present, strontium salt aerosol solutions have already been applied in Countless engineering jobs, along with the 3rd-era aerosol is now more and more accepted by buyers
Aerosol fire extinguisher software variety
a. Electrical fireplace
Communication home, interaction base station, Digital Pc home, and many others.;
Electrical fires in spots containing precision devices and devices, for example power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and so on.
b. Stable floor fireplace
Floor fireplace of combustible solid components in areas exactly where combustible reliable components are utilized or saved.
c. Liquid hearth
Liquid fires in spots wherever diesel oil is generated, used or stored (other than -35 diesel), major oil, transformer oil, animal and vegetable oil as well as other flammable liquids of Category C; Just before extinguishing a gas fire, the gas resource may be Reduce off.
Aerosol fireplace suppression program application .
d. The S-sort aerosol hearth extinguishing system can not be accustomed to set out the subsequent fires
①Substances which can be oxidized with out air, like nitrocellulose, gunpowder, etcetera.; active metals, for example potassium, sodium, magnesium, titanium, and so on.; compounds that can decompose by them selves, for example specified peroxides, hydrazine, etc. Metal hydrides, such as potassium fluoride, sodium hydride, and so on. All-natural substances, which include phosphorus. Strong oxidants, which include nitrogen oxide, fluorine, and many others.
② Deep hearth of combustible solid resources.
③ Fireplace in crowded spots, which include theaters, auditoriums, and so forth.
④ Fire in locations with explosion hazard, such as workshops with explosive dust.
⑤ Ultra-cleanse environment, such as pharmaceutical workshops, chip processing spots, clinical rooms, etc.
Aerosol fire extinguishing working basic principle
The four factors of combustion: combustibles, oxidizer, temperature and uninhibited chain reaction. The fireplace extinguishing system of fire extinguishing fuel would be to do away with a single or various from the four elements of combustion.
The good hearth extinguishing agent from the S-type aerosol fireplace extinguishing product is started out by electric power, and it undergoes redox reaction to variety numerous agglomerated fireplace extinguishing aerosols, and its composition is especially N2, a little amount of CO2, and metallic salt strong particles.
Aerosol fire extinguishing mechanism is as follows
Mechanism of endothermic cooling and fireplace extinguishing
Steel salt particles absorb a great deal of warmth at high temperatures, and undertake physical endothermic procedures for instance thermal melting and gasification. The flame temperature is reduced after which radiated into the combustible combustion area for gasification of combustible molecules and vaporized combustible molecules. The heat of pyrolysis of combustion molecules into absolutely free radicals will reduce, and the combustion reaction pace is going to be suppressed to a certain extent.
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