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Precisely what is Aerosol fire extinguishing

What exactly is aerosol hearth extinguisher? Aerosol fireplace extinguishing technological innovation is a brand new type of hearth extinguishing engineering made on the basis of armed service pyrotechnics.

The main era of aerosol hearth extinguishing technologies was born inside our state, also known as smoke hearth extinguishing technologies, which began inside the early 1960s. It was concluded by scientific researchers within the Tianjin Hearth Investigation Institute of Community Security, who independently produced an automated smoke fire extinguishing technique, which is mainly accustomed to extinguish fires in Class A, B, and C liquid storage tanks.

During the early eighties, With all the emergence of environmental defense challenges of “halon fire extinguishing agent”, finding options to halon became an important analysis matter.

At the end of the 1980s, Russian researchers to start with succeeded in studying aerosol hearth extinguishing technological know-how that could extinguish fires in a submerged method, which opened up a different way for halon substitution study. Subsequently, aerosol hearth extinguishing know-how has captivated the attention on the international Local community, and nations around the world like China, the United States, Australia, Malaysia and also other international locations have also begun research on new aerosol fire extinguishing technologies.

Generally speaking, aerosol can be a secure state process formed from the dispersion of fantastic stable or liquid particles in the gasoline. Professionally, it refers to a colloidal technique that employs gas (typically air) given that the dispersion medium and stable or liquid particles given that the dispersant.Frequent aerosols in mother nature—clouds, smoke, fog, etcetera.The dimensions from the particles in aerosols is usually during the order of ten-5 to ten-1μm, that has gasoline fluidity and will diffuse all around hurdles.

The medicament inside the aerosol hearth suppression process system is stable, as well as the ingredient emitted with the medicament through the oxidation-reduction reaction is aerosol. The very first era of aerosol fire extinguishing technological innovation-smoke hearth extinguishing know-how.

K-sort aerosol fireplace extinguisher, also referred to as potassium salt fire extinguishing technology, is the next phase of the development of aerosol hearth extinguishing know-how, which commenced in the former Soviet Union inside the mid-sixties. Our country commenced late With this regard, starting up from the early nineties.

In such a aerosol making agent, potassium nitrate is principally made use of as the key oxidant. Its sprays have higher fireplace extinguishing efficiency, but mainly because they incorporate a great deal of potassium ions, Simple to absorb dampness, forming a yellow and sticky solid alkaline conductive liquid movie, this compound is quite harming to Digital products, so K-style aerosol automated fire extinguishing gadget can’t be Utilized in Digital gear, precision devices and cultural relics Archive location. At this time, the use in the market is little by little reducing.

The 3rd-era aerosol (S style) is mainly made from strontium salt as the primary oxidant. Compared with the next-technology potassium salt (K-style) aerosol, strontium ions never soak up dampness, never form a conductive solution, and will likely not trigger harm to electrical devices. In 2001, China Cellular Communications Corporation chosen the strontium salt aerosol (S-style aerosol computerized fire extinguishing unit) made by the organization immediately after strict inspection and verification to protect its interaction foundation stations and other destinations Outfitted with complex electronic products.

At the moment, strontium salt aerosol items have been utilized in 1000s of engineering projects, as well as 3rd-generation aerosol has grown to be An increasing number of accepted by customers

Aerosol fireplace extinguisher application array

a. Electrical hearth

Interaction room, communication foundation station, Digital Computer system area, etcetera.;

Electrical fires in places that contains precision devices and machines, such as energy distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and so on.

b. Stable surface area fire

Floor hearth of combustible good materials in destinations wherever combustible strong supplies are made use of or stored.

c. Liquid fireplace

Liquid fires in places the place diesel oil is developed, made use of or stored (except -35 diesel), heavy oil, transformer oil, animal and vegetable oil along with other flammable liquids of Category C; Prior to extinguishing a fuel fire, the gas source is usually Slash off.

Aerosol fire suppression program application .

d. The S-form aerosol hearth extinguishing system cannot be utilized to put out the subsequent fires

①Substances that could be oxidized with out air, which include nitrocellulose, gunpowder, etcetera.; active metals, including potassium, sodium, magnesium, titanium, etc.; compounds that can decompose by on their own, which include sure peroxides, hydrazine, etcetera. Metal hydrides, which include potassium fluoride, sodium hydride, etc. Purely natural substances, like phosphorus. Solid oxidants, including nitrogen oxide, fluorine, and so forth.

② Deep fire of combustible sound materials.

③ Fireplace in crowded areas, like theaters, auditoriums, etc.

④ Fire in destinations with explosion hazard, including workshops with explosive dust.

⑤ Ultra-cleanse ecosystem, such as pharmaceutical workshops, chip processing spots, professional medical rooms, and many others.

Aerosol fire extinguishing Doing work theory

The four aspects of combustion: combustibles, oxidizer, temperature and uninhibited chain reaction. The fire extinguishing system of fireplace extinguishing gasoline would be to eradicate 1 or several in the 4 features of combustion.

The solid fire extinguishing agent while in the S-kind aerosol fire extinguishing device is began by electrical energy, and it undergoes redox response to kind numerous agglomerated fire extinguishing aerosols, and its composition is especially N2, a small degree of CO2, and steel salt good particles.

Aerosol fireplace extinguishing mechanism is as follows

System of endothermic cooling and hearth extinguishing

Metallic salt particles take in a large amount of heat at high temperatures, and endure physical endothermic procedures for instance thermal melting and gasification. The flame temperature is decreased then radiated into the combustible combustion floor for gasification of combustible molecules and vaporized combustible molecules. The heat of pyrolysis of combustion molecules into totally free radicals will lessen, and also the combustion reaction pace will probably be suppressed to a particular extent.

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