What is Aerosol fireplace extinguishing

What exactly is aerosol fire extinguisher? Aerosol fire extinguishing technological innovation is a fresh sort of fire extinguishing technology formulated on The idea of navy pyrotechnics.

The first technology of aerosol fireplace extinguishing technology was born inside our place, generally known as smoke fire extinguishing technological innovation, which commenced in the early 1960s. It was completed by scientific researchers from your Tianjin Fireplace Study Institute of General public Security, who independently produced an automated smoke fireplace extinguishing method, which is especially accustomed to extinguish fires in school A, B, and C liquid storage tanks.

From the early eighties, With all the emergence of environmental defense difficulties of “halon fire extinguishing agent”, getting options to halon turned a vital exploration subject.

At the conclusion of the nineteen eighties, Russian scientists first succeeded in studying aerosol fireplace extinguishing technological know-how that may extinguish fires in the submerged fashion, which opened up a different way for halon substitution investigate. Subsequently, aerosol hearth extinguishing technological know-how has attracted the attention with the Worldwide Neighborhood, and nations around the world which include China, the United States, Australia, Malaysia together with other countries have also begun investigate on new aerosol hearth extinguishing systems.

Generally speaking, aerosol is a steady state technique shaped through the dispersion of good reliable or liquid particles in the gas. Professionally, it refers to the colloidal program that works by using gas (typically air) because the dispersion medium and stable or liquid particles as being the dispersant.Typical aerosols in character—clouds, smoke, fog, etc.The dimensions on the particles in aerosols is usually during the get of 10-five to ten-1μm, which has gas fluidity and will diffuse about road blocks.

The medicament while in the aerosol hearth suppression process system is sound, as well as component emitted via the medicament in the oxidation-reduction reaction is aerosol. The very first generation of aerosol fireplace extinguishing technological know-how-smoke hearth extinguishing technologies.

K-type aerosol fire extinguisher, also referred to as potassium salt fireplace extinguishing engineering, is the 2nd stage of the development of aerosol hearth extinguishing technologies, which commenced in the former Soviet Union from the mid-sixties. Our place started late During this regard, starting up inside the early nineties.

In this sort of aerosol producing agent, potassium nitrate is principally used as the principle oxidant. Its sprays have high hearth extinguishing performance, but given that they consist of a great deal of potassium ions, Straightforward to soak up humidity, forming a yellow and sticky solid alkaline conductive liquid movie, this substance is very harming to electronic machines, so K-form aerosol computerized fire extinguishing unit cannot be used in Digital equipment, precision devices and cultural relics Archive location. At present, the use available in the market is steadily decreasing.

The 3rd-era aerosol (S type) is principally crafted from strontium salt as the most crucial oxidant. As opposed to the second-technology potassium salt (K-kind) aerosol, strontium ions never take up humidity, never form a conductive solution, and won’t induce damage to electrical gear. In 2001, China Cell Communications Corporation chosen the strontium salt aerosol (S-form aerosol automated hearth extinguishing product) made by the corporation right after stringent inspection and verification to protect its conversation foundation stations and various sites Geared up with subtle electronic devices.

At present, strontium salt aerosol merchandise are used in A huge number of engineering projects, and the 3rd-generation aerosol has grown to be A growing number of acknowledged by end users

Aerosol fireplace extinguisher application vary

a. Electrical hearth

Communication room, interaction base station, Digital Laptop room, and so forth.;

Electrical fires in areas containing precision devices and products, which include power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and so forth.

b. Solid floor hearth

Surface fireplace of combustible strong resources in destinations the place combustible good resources are utilized or saved.

c. Liquid fire

Liquid fires in places exactly where diesel oil is made, applied or saved (apart from -35 diesel), hefty oil, transformer oil, animal and vegetable oil and other flammable liquids of Classification C; Just before extinguishing a gasoline hearth, the fuel resource is usually Lower off.

Aerosol hearth suppression technique software .

d. The S-style aerosol fire extinguishing machine cannot be utilized to set out the next fires

①Substances which might be oxidized without the need of air, for instance nitrocellulose, gunpowder, and many others.; Energetic metals, for example potassium, sodium, magnesium, titanium, etc.; compounds that will decompose by them selves, including specified peroxides, hydrazine, and many others. Metal hydrides, like potassium fluoride, sodium hydride, and many others. Natural substances, for instance phosphorus. Strong oxidants, for example nitrogen oxide, fluorine, and so on.

② Deep fireplace of combustible reliable materials.

③ Fireplace in crowded places, which include theaters, auditoriums, etc.

④ Hearth in sites with explosion hazard, such as workshops with explosive dust.

⑤ Ultra-clean up surroundings, for instance pharmaceutical workshops, chip processing destinations, professional medical rooms, and so forth.

Aerosol hearth extinguishing Performing basic principle

The 4 components of combustion: combustibles, oxidizer, temperature and uninhibited chain reaction. The hearth extinguishing mechanism of fireplace extinguishing gas will be to get rid of a single or many of your four factors of combustion.

The sound fire extinguishing agent in the S-variety aerosol hearth extinguishing system is commenced by electrical power, and it undergoes redox reaction to type numerous agglomerated fire extinguishing aerosols, and its composition is mainly N2, a small number of CO2, and metal salt stable particles.

Aerosol fireplace extinguishing system is as follows

System of endothermic cooling and fireplace extinguishing

Steel salt particles soak up a great deal of heat at higher temperatures, and bear Actual physical endothermic procedures which include thermal melting and gasification. The flame temperature is lowered and afterwards radiated on the combustible combustion surface area for gasification of combustible molecules and vaporized combustible molecules. The heat of pyrolysis of combustion molecules into cost-free radicals will lessen, along with the combustion response speed will be suppressed to a specific extent.

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