Precisely what is Aerosol fireplace extinguishing

What exactly is aerosol fireplace extinguisher? Aerosol fire extinguishing technology is a fresh sort of fire extinguishing technological know-how designed on the basis of military pyrotechnics.

The primary generation of aerosol hearth extinguishing know-how was born within our country, generally known as smoke fire extinguishing engineering, which started while in the early nineteen sixties. It was accomplished by scientific researchers within the Tianjin Hearth Investigate Institute of General public Stability, who independently developed an automated smoke fire extinguishing system, which is especially utilized to extinguish fires in school A, B, and C liquid storage tanks.

Within the early eighties, with the emergence of environmental defense problems of “halon fireplace extinguishing agent”, discovering possibilities to halon turned a very important investigation subject.

At the conclusion of the eighties, Russian experts initial succeeded in investigating aerosol hearth extinguishing technological innovation that can extinguish fires inside a submerged fashion, which opened up a new way for halon substitution investigation. Subsequently, aerosol fire extinguishing know-how has attracted the attention with the Global Group, and international locations including China, The usa, Australia, Malaysia and also other nations have also started research on new aerosol fireplace extinguishing technologies.

Most of the time, aerosol is usually a steady state system formed with the dispersion of great sound or liquid particles in a gas. Skillfully, it refers into a colloidal system that makes use of gas (typically air) as being the dispersion medium and good or liquid particles because the dispersant.Prevalent aerosols in nature—clouds, smoke, fog, and so on.The scale of the particles in aerosols is mostly inside the purchase of ten-5 to ten-oneμm, which has fuel fluidity and can diffuse close to obstructions.

The medicament during the aerosol fireplace suppression technique system is stable, and the component emitted by the medicament through the oxidation-reduction response is aerosol. The first era of aerosol hearth extinguishing technology-smoke fire extinguishing engineering.

K-style aerosol fire extinguisher, also known as potassium salt fireplace extinguishing engineering, is the 2nd phase of the development of aerosol hearth extinguishing technologies, which started in the former Soviet Union within the mid-1960s. Our place began late During this regard, setting up inside the early nineteen nineties.

In such a aerosol building agent, potassium nitrate is especially used as the most crucial oxidant. Its sprays have higher fire extinguishing performance, but simply because they incorporate a great deal of potassium ions, Simple to absorb moisture, forming a yellow and sticky strong alkaline conductive liquid movie, this material is extremely damaging to electronic gear, so K-sort aerosol computerized fire extinguishing machine can not be Utilized in electronic machines, precision instruments and cultural relics Archive put. At this time, the use in the market is little by little reducing.

The 3rd-era aerosol (S form) is especially made from strontium salt as the key oxidant. Not like the next-era potassium salt (K-style) aerosol, strontium ions will not absorb humidity, do not type a conductive solution, and will likely not trigger damage to electrical tools. In 2001, China Mobile Communications Company picked the strontium salt aerosol (S-style aerosol automatic fire extinguishing device) produced by the company just after stringent inspection and verification to shield its interaction foundation stations as well as other sites Geared up with complex electronic gear.

At present, strontium salt aerosol solutions are actually utilized in 1000s of engineering jobs, and also the third-generation aerosol happens to be An increasing number of acknowledged by people

Aerosol hearth extinguisher application array

a. Electrical fire

Interaction home, interaction foundation station, Digital Pc space, etc.;

Electrical fires in destinations made up of precision devices and products, such as electrical power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, etcetera.

b. Reliable surface fireplace

Floor hearth of combustible sound supplies in sites where by combustible strong components are employed or saved.

c. Liquid fireplace

Liquid fires in spots where by diesel oil is manufactured, utilised or saved (besides -35 diesel), significant oil, transformer oil, animal and vegetable oil and various flammable liquids of Category C; In advance of extinguishing a fuel fireplace, the fuel source could be Reduce off.

Aerosol fireplace suppression program application .

d. The S-type aerosol hearth extinguishing machine can not be used to place out the following fires

①Substances that can be oxidized without having air, for example nitrocellulose, gunpowder, and so forth.; Energetic metals, such as potassium, sodium, magnesium, titanium, etc.; compounds that can decompose by themselves, including sure peroxides, hydrazine, and so forth. Metallic hydrides, such as potassium fluoride, sodium hydride, etcetera. Organic substances, which include phosphorus. Sturdy oxidants, which include nitrogen oxide, fluorine, and so on.

② Deep fire of combustible reliable supplies.

③ Fireplace in crowded destinations, which include theaters, auditoriums, and so forth.

④ Fire in places with explosion hazard, for instance workshops with explosive dust.

⑤ Extremely-clean up ecosystem, for example pharmaceutical workshops, chip processing spots, healthcare rooms, and so forth.

Aerosol hearth extinguishing Performing principle

The 4 things of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The hearth extinguishing mechanism of fire extinguishing fuel is to get rid of just one or numerous of the 4 aspects of combustion.

The strong fireplace extinguishing agent within the S-kind aerosol hearth extinguishing device is started out by energy, and it undergoes redox response to kind numerous agglomerated fire extinguishing aerosols, and its composition is principally N2, a small volume of CO2, and metallic salt good particles.

Aerosol fireplace extinguishing system is as follows

Mechanism of endothermic cooling and hearth extinguishing

Steel salt particles soak up a large amount of warmth at substantial temperatures, and go through Actual physical endothermic processes which include thermal melting and gasification. The flame temperature is decreased and then radiated for the combustible combustion surface area for gasification of combustible molecules and vaporized combustible molecules. The heat of pyrolysis of combustion molecules into free radicals will reduce, along with the combustion reaction velocity is going to be suppressed to a certain extent.

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