What is Aerosol hearth extinguishing
What is aerosol fire extinguisher? Aerosol fire extinguishing technology is a completely new form of fireplace extinguishing technologies created on The premise of army pyrotechnics.
The primary technology of aerosol fireplace extinguishing know-how was born inside our region, also referred to as smoke fireplace extinguishing engineering, which began from the early 1960s. It was concluded by scientific researchers through the Tianjin Fireplace Analysis Institute of General public Safety, who independently designed an computerized smoke fire extinguishing program, which is especially accustomed to extinguish fires at school A, B, and C liquid storage tanks.
While in the early 1980s, Along with the emergence of environmental defense difficulties of “halon hearth extinguishing agent”, acquiring solutions to halon turned an important exploration subject.
At the conclusion of the nineteen eighties, Russian experts initially succeeded in looking into aerosol hearth extinguishing engineering that will extinguish fires inside a submerged fashion, which opened up a whole new way for halon substitution analysis. Subsequently, aerosol hearth extinguishing engineering has captivated the attention of your international community, and countries like China, America, Australia, Malaysia together with other nations around the world have also started investigation on new aerosol fire extinguishing systems.
Generally speaking, aerosol is really a secure point out technique shaped through the dispersion of wonderful sound or liquid particles within a gas. Professionally, it refers into a colloidal procedure that makes use of gasoline (commonly air) given that the dispersion medium and strong or liquid particles as being the dispersant.Popular aerosols in nature—clouds, smoke, fog, and so on.The size with the particles in aerosols is generally during the get of 10-5 to 10-1μm, which has fuel fluidity and can diffuse all around road blocks.
The medicament from the aerosol fireplace suppression procedure machine is solid, plus the component emitted via the medicament throughout the oxidation-reduction response is aerosol. The first technology of aerosol fire extinguishing technological know-how-smoke hearth extinguishing technology.
K-type aerosol hearth extinguisher, also known as potassium salt hearth extinguishing technologies, is the next stage of the development of aerosol fire extinguishing technologies, which started in the former Soviet Union within the mid-nineteen sixties. Our region begun late in this regard, starting in the early 1990s.
In this sort of aerosol building agent, potassium nitrate is especially used as the key oxidant. Its sprays have higher fire extinguishing effectiveness, but as they comprise a great deal of potassium ions, Easy to absorb moisture, forming a yellow and sticky sturdy alkaline conductive liquid movie, this material is quite harmful to electronic gear, so K-kind aerosol computerized fireplace extinguishing gadget cannot be Employed in Digital products, precision devices and cultural relics Archive spot. At the moment, the use in the market is progressively decreasing.
The 3rd-generation aerosol (S type) is mainly made from strontium salt as the key oxidant. Unlike the 2nd-technology potassium salt (K-form) aerosol, strontium ions do not take up dampness, usually do not type a conductive Remedy, and will not induce damage to electrical products. In 2001, China Mobile Communications Company picked the strontium salt aerosol (S-variety aerosol automated fire extinguishing device) produced by the business just after rigid inspection and verification to protect its interaction foundation stations together with other locations Outfitted with sophisticated electronic machines.
At present, strontium salt aerosol merchandise are applied in Countless engineering jobs, along with the 3rd-technology aerosol has become A growing number of acknowledged by end users
Aerosol fireplace extinguisher application range
a. Electrical hearth
Interaction space, communication base station, electronic Laptop or computer home, and many others.;
Electrical fires in spots made up of precision devices and machines, including electrical power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and so on.
b. Reliable area fireplace
Floor fireplace of combustible stable supplies in areas in which combustible solid elements are used or stored.
c. Liquid fireplace
Liquid fires in areas wherever diesel oil is made, utilised or saved (apart from -35 diesel), major oil, transformer oil, animal and vegetable oil together with other flammable liquids of Classification C; Right before extinguishing a fuel fireplace, the gas resource may be Slash off.
Aerosol fireplace suppression program application .
d. The S-sort aerosol hearth extinguishing device can not be accustomed to set out the following fires
①Substances that can be oxidized without the need of air, for instance nitrocellulose, gunpowder, etc.; Lively metals, which include potassium, sodium, magnesium, titanium, etc.; compounds that could decompose by themselves, like particular peroxides, hydrazine, and so forth. Metallic hydrides, such as potassium fluoride, sodium hydride, and so forth. Purely natural substances, such as phosphorus. Solid oxidants, including nitrogen oxide, fluorine, and so on.
② Deep hearth of combustible solid products.
③ Fireplace in crowded sites, such as theaters, auditoriums, and so forth.
④ Fireplace in locations with explosion hazard, such as workshops with explosive dust.
⑤ Ultra-clean up setting, such as pharmaceutical workshops, chip processing spots, medical rooms, and many others.
Aerosol hearth extinguishing Performing basic principle
The 4 aspects of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The fireplace extinguishing mechanism of fireplace extinguishing fuel will be to remove just one or various of the 4 components of combustion.
The strong fireplace extinguishing agent from the S-type aerosol fire extinguishing device is commenced by electric power, and it undergoes redox reaction to form numerous agglomerated fire extinguishing aerosols, and its composition is mainly N2, a little level of CO2, and metallic salt solid particles.
Aerosol fireplace extinguishing system is as follows
System of endothermic cooling and fire extinguishing
Steel salt particles absorb a great deal of warmth at significant temperatures, and go through Actual physical endothermic processes such as thermal melting and gasification. The flame temperature is reduced and after that radiated to your combustible combustion surface for gasification of combustible molecules and vaporized combustible molecules. The heat of pyrolysis of combustion molecules into totally free radicals will decrease, and also the combustion response pace will likely be suppressed to a certain extent.
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