Exactly what is Aerosol fire extinguishing

What exactly is aerosol fire extinguisher? Aerosol hearth extinguishing technologies is a whole new form of hearth extinguishing technologies created on the basis of armed forces pyrotechnics.

The 1st generation of aerosol fire extinguishing technological know-how was born in our nation, also known as smoke fireplace extinguishing know-how, which commenced during the early 1960s. It had been finished by scientific researchers through the Tianjin Fire Exploration Institute of Public Security, who independently produced an automatic smoke fire extinguishing procedure, which is especially accustomed to extinguish fires in school A, B, and C liquid storage tanks.

From the early nineteen eighties, Using the emergence of environmental protection troubles of “halon fire extinguishing agent”, locating alternatives to halon became an important research subject.

At the end of the 1980s, Russian scientists 1st succeeded in researching aerosol fire extinguishing know-how that will extinguish fires in a submerged manner, which opened up a fresh way for halon substitution study. Subsequently, aerosol fireplace extinguishing technological innovation has captivated the attention of the Worldwide Neighborhood, and nations for example China, the United States, Australia, Malaysia as well as other countries have also begun exploration on new aerosol hearth extinguishing systems.

Most of the time, aerosol is usually a stable condition system shaped from the dispersion of fine stable or liquid particles in the gasoline. Skillfully, it refers to a colloidal process that makes use of gasoline (commonly air) because the dispersion medium and strong or liquid particles since the dispersant.Frequent aerosols in nature—clouds, smoke, fog, and so on.The size from the particles in aerosols is generally within the order of ten-five to ten-1μm, which has fuel fluidity and might diffuse all around road blocks.

The medicament inside the aerosol hearth suppression technique device is sound, as well as ingredient emitted because of the medicament throughout the oxidation-reduction reaction is aerosol. The initial era of aerosol hearth extinguishing technological know-how-smoke fireplace extinguishing technological innovation.

K-style aerosol fire extinguisher, also referred to as potassium salt hearth extinguishing know-how, is the second phase of the development of aerosol fireplace extinguishing know-how, which commenced in the former Soviet Union while in the mid-1960s. Our region started off late In this particular regard, starting inside the early nineties.

In this type of aerosol producing agent, potassium nitrate is mainly used as the most crucial oxidant. Its sprays have significant fireplace extinguishing efficiency, but simply because they consist of a large amount of potassium ions, Uncomplicated to soak up moisture, forming a yellow and sticky powerful alkaline conductive liquid film, this material is incredibly harming to electronic devices, so K-form aerosol computerized fireplace extinguishing gadget cannot be Utilized in Digital tools, precision instruments and cultural relics Archive location. At the moment, the use on the market is step by step reducing.

The 3rd-technology aerosol (S type) is especially manufactured from strontium salt as the key oxidant. Compared with the 2nd-generation potassium salt (K-kind) aerosol, strontium ions usually do not take in humidity, usually do not kind a conductive Option, and is not going to lead to harm to electrical equipment. In 2001, China Cellular Communications Corporation picked the strontium salt aerosol (S-sort aerosol automatic fireplace extinguishing machine) made by the organization just after rigorous inspection and verification to protect its communication foundation stations and other places equipped with refined Digital gear.

At this time, strontium salt aerosol products and solutions happen to be applied in Many engineering initiatives, and the 3rd-generation aerosol has become more and more approved by end users

Aerosol fire extinguisher application assortment

a. Electrical fire

Interaction room, conversation base station, electronic Laptop home, and so forth.;

Electrical fires in areas containing precision instruments and tools, for instance power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and so on.

b. Solid floor fireplace

Surface fireplace of combustible good supplies in places the place combustible good components are used or stored.

c. Liquid fire

Liquid fires in spots wherever diesel oil is manufactured, made use of or saved (other than -35 diesel), major oil, transformer oil, animal and vegetable oil and also other flammable liquids of Class C; Just before extinguishing a gas hearth, the gas resource can be Minimize off.

Aerosol hearth suppression process software .

d. The S-type aerosol fireplace extinguishing machine cannot be utilized to put out the following fires

①Substances that may be oxidized without having air, for instance nitrocellulose, gunpowder, and many others.; Lively metals, such as potassium, sodium, magnesium, titanium, and so forth.; compounds which will decompose by them selves, for instance particular peroxides, hydrazine, and so forth. Metallic hydrides, including potassium fluoride, sodium hydride, and so on. All-natural substances, such as phosphorus. Robust oxidants, for example nitrogen oxide, fluorine, and so forth.

② Deep fire of combustible stable materials.

③ Hearth in crowded areas, for example theaters, auditoriums, and so forth.

④ Fireplace in destinations with explosion hazard, for instance workshops with explosive dust.

⑤ Extremely-cleanse surroundings, for instance pharmaceutical workshops, chip processing locations, clinical rooms, etc.

Aerosol fire extinguishing Performing basic principle

The 4 things of combustion: combustibles, oxidizer, temperature and uninhibited chain reaction. The hearth extinguishing system of hearth extinguishing fuel will be to eradicate a person or quite a few with the 4 features of combustion.

The good fire extinguishing agent inside the S-variety aerosol hearth extinguishing system is began by electrical energy, and it undergoes redox reaction to kind a lot of agglomerated fireplace extinguishing aerosols, and its composition is mainly N2, a small amount of CO2, and steel salt solid particles.

Aerosol fire extinguishing system is as follows

System of endothermic cooling and fire extinguishing

Metal salt particles take up a large amount of heat at high temperatures, and bear Bodily endothermic procedures for instance thermal melting and gasification. The flame temperature is reduced then radiated to your combustible combustion surface for gasification of combustible molecules and vaporized combustible molecules. The warmth of pyrolysis of combustion molecules into absolutely free radicals will lower, plus the combustion reaction pace will likely be suppressed to a certain extent.

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