Precisely what is Aerosol fire extinguishing
What's aerosol fire extinguisher? Aerosol fire extinguishing technological know-how is a brand new sort of fire extinguishing technological innovation produced on The premise of military services pyrotechnics.
The very first generation of aerosol fireplace extinguishing engineering was born within our region, also known as smoke fire extinguishing technology, which began within the early sixties. It was concluded by scientific researchers from the Tianjin Hearth Exploration Institute of Public Stability, who independently made an computerized smoke fire extinguishing technique, which is especially used to extinguish fires at school A, B, and C liquid storage tanks.
From the early 1980s, with the emergence of environmental protection complications of “halon hearth extinguishing agent”, acquiring choices to halon grew to become a crucial investigate subject matter.
At the conclusion of the 1980s, Russian scientists first succeeded in researching aerosol hearth extinguishing engineering that will extinguish fires inside a submerged method, which opened up a whole new way for halon substitution investigate. Subsequently, aerosol fireplace extinguishing engineering has attracted the attention of your Global Neighborhood, and nations around the world for example China, The us, Australia, Malaysia as well as other nations have also started exploration on new aerosol fire extinguishing systems.
Most of the time, aerosol is usually a steady state technique shaped by the dispersion of fantastic sound or liquid particles in the gasoline. Professionally, it refers to the colloidal method that uses fuel (normally air) since the dispersion medium and reliable or liquid particles as being the dispersant.Popular aerosols in nature—clouds, smoke, fog, etc.The size of the particles in aerosols is usually from the get of ten-five to ten-oneμm, which has gasoline fluidity and can diffuse all-around obstructions.
The medicament during the aerosol fire suppression method unit is reliable, and the element emitted because of the medicament through the oxidation-reduction response is aerosol. The main generation of aerosol fire extinguishing technological know-how-smoke hearth extinguishing technological know-how.
K-style aerosol hearth extinguisher, also known as potassium salt fireplace extinguishing engineering, is the next phase of the development of aerosol fireplace extinguishing engineering, which started in the former Soviet Union within the mid-1960s. Our region commenced late On this regard, starting up within the early 1990s.
In this sort of aerosol producing agent, potassium nitrate is principally utilized as the primary oxidant. Its sprays have substantial hearth extinguishing performance, but since they consist of a great deal of potassium ions, Uncomplicated to absorb dampness, forming a yellow and sticky strong alkaline conductive liquid film, this compound is very harmful to Digital devices, so K-type aerosol automatic hearth extinguishing machine can not be Utilized in electronic products, precision instruments and cultural relics Archive position. At present, the use in the market is slowly lowering.
The 3rd-era aerosol (S type) is principally fabricated from strontium salt as the most crucial oxidant. In contrast to the 2nd-technology potassium salt (K-kind) aerosol, strontium ions will not soak up humidity, don't variety a conductive Resolution, and will never lead to damage to electrical equipment. In 2001, China Cellular Communications Company selected the strontium salt aerosol (S-type aerosol automatic fire extinguishing device) produced by the business after rigid inspection and verification to protect its interaction base stations along with other destinations equipped with subtle electronic equipment.
At present, strontium salt aerosol items have been utilized in A large number of engineering jobs, along with the 3rd-technology aerosol has become Increasingly more accepted by customers
Aerosol fire extinguisher software vary
a. Electrical fire
Interaction home, conversation base station, electronic Laptop or computer room, and so forth.;
Electrical fires in locations containing precision devices and equipment, including electrical power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and so forth.
b. Good area fireplace
Surface fireplace of combustible solid materials in sites where by combustible good supplies are used or stored.
c. Liquid fireplace
Liquid fires in sites where diesel oil is created, utilized or stored (apart from -35 diesel), major oil, transformer oil, animal and vegetable oil together with other flammable liquids of Group C; Prior to extinguishing a fuel fireplace, the gas resource is usually Lower off.
Aerosol fire suppression system software .
d. The S-variety aerosol fireplace extinguishing product can not be accustomed to place out the subsequent fires
①Substances which might be oxidized with no air, for instance nitrocellulose, gunpowder, and so forth.; Lively metals, including potassium, sodium, magnesium, titanium, and so on.; compounds that may decompose by by themselves, which include particular peroxides, hydrazine, and so on. Metal hydrides, for instance potassium fluoride, sodium hydride, etcetera. Organic substances, for example phosphorus. Solid oxidants, for instance nitrogen oxide, fluorine, and so forth.
② Deep fire of combustible reliable resources.
③ Fire in crowded destinations, such as theaters, auditoriums, and so on.
④ Fire in places with explosion hazard, like workshops with explosive dust.
⑤ Ultra-clean ecosystem, for example pharmaceutical workshops, chip processing destinations, health care rooms, etc.
Aerosol hearth extinguishing Performing basic principle
The four features of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The hearth extinguishing system of fireplace extinguishing fuel is always to eliminate a person or several from the four elements of combustion.
The sound fireplace extinguishing agent in the S-style aerosol fireplace extinguishing system is started by electrical energy, and it undergoes redox reaction to variety numerous agglomerated fireplace extinguishing aerosols, and its composition is mainly N2, a little degree of CO2, and steel salt solid particles.
Aerosol fireplace extinguishing system is as follows
System of endothermic cooling and fire extinguishing
Steel salt particles soak up a great deal of warmth at large temperatures, and undertake Bodily endothermic processes including thermal melting and gasification. The flame temperature is reduced and afterwards radiated into the combustible combustion surface for gasification of combustible molecules and vaporized combustible molecules. The warmth of pyrolysis of combustion molecules into absolutely free radicals will reduce, and also the combustion response pace is going to be suppressed to a particular extent.
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