What is Aerosol hearth extinguishing

Exactly what is aerosol fireplace extinguisher? Aerosol hearth extinguishing technologies is a brand new form of fireplace extinguishing technological know-how created on The premise of armed service pyrotechnics.

The very first technology of aerosol hearth extinguishing know-how was born within our nation, also called smoke hearth extinguishing technologies, which began inside the early nineteen sixties. It absolutely was done by scientific scientists with the Tianjin Fire Investigation Institute of Public Stability, who independently produced an automatic smoke hearth extinguishing system, which is principally accustomed to extinguish fires in school A, B, and C liquid storage tanks.

Within the early 1980s, Along with the emergence of environmental safety difficulties of “halon hearth extinguishing agent”, discovering alternatives to halon grew to become a significant study subject.

At the end of the 1980s, Russian scientists initially succeeded in investigating aerosol fire extinguishing technologies that can extinguish fires in a very submerged way, which opened up a fresh way for halon substitution investigation. Subsequently, aerosol fire extinguishing technology has attracted the attention of your Intercontinental Neighborhood, and countries which include China, The us, Australia, Malaysia along with other nations around the world have also started research on new aerosol fireplace extinguishing technologies.

Generally speaking, aerosol is often a stable point out method shaped via the dispersion of fantastic strong or liquid particles in a fuel. Professionally, it refers into a colloidal method that utilizes gas (usually air) given that the dispersion medium and stable or liquid particles since the dispersant.Popular aerosols in nature—clouds, smoke, fog, etc.The dimensions with the particles in aerosols is generally while in the get of 10-five to 10-oneμm, which has gasoline fluidity and might diffuse all around obstructions.

The medicament from the aerosol fire suppression system unit is sound, along with the part emitted with the medicament in the oxidation-reduction reaction is aerosol. The 1st technology of aerosol hearth extinguishing technologies-smoke hearth extinguishing know-how.

K-style aerosol fireplace extinguisher, also known as potassium salt fire extinguishing technological know-how, is the 2nd phase of the event of aerosol fireplace extinguishing know-how, which began in the previous Soviet Union in the mid-nineteen sixties. Our region commenced late in this regard, setting up from the early nineties.

In this type of aerosol generating agent, potassium nitrate is mainly used as the key oxidant. Its sprays have large fire extinguishing efficiency, but simply because they contain a great deal of potassium ions, Effortless to absorb humidity, forming a yellow and sticky solid alkaline conductive liquid movie, this material is rather harming to electronic equipment, so K-type aerosol automated fireplace extinguishing gadget cannot be Employed in electronic gear, precision devices and cultural relics Archive location. At present, the use out there is step by step decreasing.

The third-generation aerosol (S form) is principally made from strontium salt as the principle oxidant. Not like the 2nd-era potassium salt (K-form) aerosol, strontium ions usually do not take in humidity, usually do not kind a conductive solution, and is not going to cause damage to electrical gear. In 2001, China Cell Communications Company selected the strontium salt aerosol (S-style aerosol automated hearth extinguishing system) made by the company after demanding inspection and verification to shield its conversation foundation stations and other places Geared up with refined electronic equipment.

At the moment, strontium salt aerosol merchandise have already been applied in Countless engineering tasks, as well as 3rd-generation aerosol happens to be Progressively more recognized by buyers

Aerosol hearth extinguisher application assortment

a. Electrical fire

Interaction area, interaction base station, Digital Pc space, and so forth.;

Electrical fires in spots made up of precision devices and devices, including electrical power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and so forth.

b. Solid floor fire

Area fireplace of combustible strong elements in destinations the place combustible good materials are applied or stored.

c. Liquid hearth

Liquid fires in locations wherever diesel oil is produced, used or saved (apart from -35 diesel), weighty oil, transformer oil, animal and vegetable oil along with other flammable liquids of Category C; Right before extinguishing a fuel hearth, the gasoline resource can be Minimize off.

Aerosol fireplace suppression program software .

d. The S-variety aerosol hearth extinguishing unit can not be utilized to put out the following fires

①Substances which can be oxidized devoid of air, for instance nitrocellulose, gunpowder, and so on.; active metals, including potassium, sodium, magnesium, titanium, etc.; compounds that can decompose by themselves, such as specified peroxides, hydrazine, etcetera. Metal hydrides, such as potassium fluoride, sodium hydride, and so forth. Natural substances, which include phosphorus. Powerful oxidants, for example nitrogen oxide, fluorine, and so on.

② Deep hearth of combustible reliable components.

③ Fireplace in crowded places, for example theaters, auditoriums, and so forth.

④ Fire in sites with explosion hazard, like workshops with explosive dust.

⑤ Extremely-clear natural environment, like pharmaceutical workshops, chip processing places, healthcare rooms, and so on.

Aerosol hearth extinguishing Operating principle

The 4 elements of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The hearth extinguishing system of fire extinguishing gasoline is always to eliminate 1 or many of the 4 features of combustion.

The stable fireplace extinguishing agent within the S-variety aerosol hearth extinguishing gadget is started off by energy, and it undergoes redox reaction to sort a large number of agglomerated hearth extinguishing aerosols, and its composition is principally N2, a little degree of CO2, and steel salt stable particles.

Aerosol hearth extinguishing mechanism is as follows

Mechanism of endothermic cooling and hearth extinguishing

Metallic salt particles absorb a great deal of heat at superior temperatures, and undergo Actual physical endothermic processes like thermal melting and gasification. The flame temperature is reduced and after that radiated to your combustible combustion floor for gasification of combustible molecules and vaporized combustible molecules. The heat of pyrolysis of combustion molecules into no cost radicals will lessen, along with the combustion reaction velocity will be suppressed to a certain extent.

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