Precisely what is Aerosol fireplace extinguishing

What on earth is aerosol fire extinguisher? Aerosol fire extinguishing technologies is a brand new kind of fire extinguishing engineering produced on the basis of army pyrotechnics.

The main era of aerosol hearth extinguishing technologies was born in our region, generally known as smoke fire extinguishing technologies, which started within the early sixties. It absolutely was completed by scientific researchers from your Tianjin Fireplace Investigation Institute of Public Safety, who independently developed an automated smoke fireplace extinguishing system, which is especially accustomed to extinguish fires in school A, B, and C liquid storage tanks.

Inside the early eighties, Together with the emergence of environmental safety troubles of “halon fire extinguishing agent”, locating alternate options to halon grew to become an important investigation subject.

At the conclusion of the eighties, Russian researchers first succeeded in looking into aerosol fireplace extinguishing engineering which can extinguish fires in a submerged manner, which opened up a whole new way for halon substitution study. Subsequently, aerosol fire extinguishing know-how has captivated the attention with the Intercontinental Local community, and nations which include China, The usa, Australia, Malaysia as well as other nations have also begun study on new aerosol fireplace extinguishing systems.

In most cases, aerosol is really a secure condition procedure fashioned via the dispersion of good solid or liquid particles in a fuel. Skillfully, it refers to some colloidal procedure that employs fuel (ordinarily air) since the dispersion medium and stable or liquid particles as the dispersant.Common aerosols in nature—clouds, smoke, fog, etcetera.The dimensions on the particles in aerosols is generally inside the order of 10-five to 10-oneμm, that has gas fluidity and can diffuse close to hurdles.

The medicament from the aerosol hearth suppression procedure system is sound, as well as part emitted through the medicament through the oxidation-reduction reaction is aerosol. The primary era of aerosol fire extinguishing engineering-smoke fireplace extinguishing engineering.

K-type aerosol fireplace extinguisher, also known as potassium salt fire extinguishing technological innovation, is the 2nd stage of the development of aerosol fire extinguishing technology, which commenced in the former Soviet Union while in the mid-1960s. Our country commenced late On this regard, commencing during the early nineteen nineties.

In this kind of aerosol building agent, potassium nitrate is especially utilised as the leading oxidant. Its sprays have high hearth extinguishing efficiency, but mainly because they incorporate a great deal of potassium ions, Uncomplicated to absorb dampness, forming a yellow and sticky solid alkaline conductive liquid movie, this compound is incredibly harmful to Digital products, so K-kind aerosol automatic fireplace extinguishing gadget cannot be Employed in electronic gear, precision instruments and cultural relics Archive position. At present, the use available in the market is progressively lowering.

The 3rd-generation aerosol (S sort) is mainly manufactured from strontium salt as the principle oxidant. In contrast to the next-generation potassium salt (K-sort) aerosol, strontium ions usually do not absorb moisture, do not form a conductive Resolution, and will not cause damage to electrical machines. In 2001, China Cell Communications Corporation selected the strontium salt aerosol (S-variety aerosol computerized hearth extinguishing product) produced by the business just after rigorous inspection and verification to guard its conversation base stations and various areas Geared up with subtle Digital products.

At present, strontium salt aerosol products happen to be applied in Many engineering initiatives, plus the third-generation aerosol has grown to be A growing number of recognized by customers

Aerosol fire extinguisher software variety

a. Electrical fire

Interaction place, interaction foundation station, Digital computer area, and many others.;

Electrical fires in sites made up of precision devices and tools, like ability distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and many others.

b. Sound surface area fire

Surface fireplace of combustible reliable materials in places where by combustible stable resources are applied or stored.

c. Liquid fireplace

Liquid fires in locations in which diesel oil is made, made use of or stored (apart from -35 diesel), major oil, transformer oil, animal and vegetable oil as well as other flammable liquids of Group C; Right before extinguishing a fuel fire, the gas resource could be Slash off.

Aerosol fireplace suppression procedure application .

d. The S-variety aerosol fire extinguishing device can’t be utilized to put out the following fires

①Substances which can be oxidized without having air, which include nitrocellulose, gunpowder, and so on.; active metals, such as potassium, sodium, magnesium, titanium, and so on.; compounds that will decompose by them selves, including particular peroxides, hydrazine, and so forth. Steel hydrides, such as potassium fluoride, sodium hydride, and so on. Pure substances, which include phosphorus. Strong oxidants, for example nitrogen oxide, fluorine, and many others.

② Deep fire of combustible solid products.

③ Hearth in crowded sites, which include theaters, auditoriums, etc.

④ Fireplace in sites with explosion hazard, which include workshops with explosive dust.

⑤ Extremely-clean atmosphere, like pharmaceutical workshops, chip processing places, clinical rooms, and so on.

Aerosol fire extinguishing Functioning theory

The four aspects of combustion: combustibles, oxidizer, temperature and uninhibited chain reaction. The fireplace extinguishing system of fire extinguishing gasoline would be to do away with one or many with the 4 factors of combustion.

The good hearth extinguishing agent while in the S-form aerosol fireplace extinguishing product is commenced by energy, and it undergoes redox response to kind a lot of agglomerated fire extinguishing aerosols, and its composition is especially N2, a small degree of CO2, and metallic salt strong particles.

Aerosol fire extinguishing system is as follows

System of endothermic cooling and fireplace extinguishing

Metallic salt particles soak up a large amount of heat at large temperatures, and bear Bodily endothermic processes for example thermal melting and gasification. The flame temperature is reduced after which radiated into the combustible combustion surface area for gasification of combustible molecules and vaporized combustible molecules. The heat of pyrolysis of combustion molecules into totally free radicals will minimize, and the combustion response velocity are going to be suppressed to a specific extent.

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