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What on earth is Aerosol hearth extinguishing

Exactly what is aerosol fireplace extinguisher? Aerosol fire extinguishing engineering is a new type of fire extinguishing engineering produced on the basis of military services pyrotechnics.

The very first technology of aerosol fire extinguishing technological know-how was born inside our region, also known as smoke hearth extinguishing technology, which began in the early 1960s. It had been completed by scientific researchers with the Tianjin Hearth Investigation Institute of General public Stability, who independently designed an automated smoke fire extinguishing procedure, which is mainly accustomed to extinguish fires at school A, B, and C liquid storage tanks.

During the early nineteen eighties, Along with the emergence of environmental protection challenges of “halon fire extinguishing agent”, acquiring choices to halon turned an essential investigate topic.

At the end of the eighties, Russian experts initially succeeded in studying aerosol fire extinguishing technologies that may extinguish fires inside a submerged way, which opened up a brand new way for halon substitution investigation. Subsequently, aerosol fireplace extinguishing know-how has captivated the attention of your Global Local community, and countries which include China, America, Australia, Malaysia and also other countries have also begun exploration on new aerosol fire extinguishing systems.

Generally speaking, aerosol is actually a steady condition system shaped via the dispersion of good stable or liquid particles within a fuel. Professionally, it refers into a colloidal technique that utilizes gas (generally air) since the dispersion medium and strong or liquid particles given that the dispersant.Prevalent aerosols in mother nature—clouds, smoke, fog, and many others.The scale from the particles in aerosols is generally in the buy of ten-5 to 10-oneμm, which has gas fluidity and can diffuse about hurdles.

The medicament in the aerosol hearth suppression system machine is solid, as well as part emitted from the medicament in the oxidation-reduction reaction is aerosol. The primary technology of aerosol hearth extinguishing technology-smoke fireplace extinguishing technological innovation.

K-variety aerosol hearth extinguisher, also called potassium salt fire extinguishing engineering, is the 2nd stage of the development of aerosol hearth extinguishing know-how, which commenced in the previous Soviet Union while in the mid-nineteen sixties. Our nation started out late In this particular regard, commencing in the early nineteen nineties.

In this sort of aerosol producing agent, potassium nitrate is principally utilised as the main oxidant. Its sprays have significant hearth extinguishing performance, but since they consist of a large amount of potassium ions, Quick to absorb moisture, forming a yellow and sticky potent alkaline conductive liquid movie, this substance is extremely harmful to Digital products, so K-sort aerosol computerized fire extinguishing gadget cannot be used in electronic devices, precision instruments and cultural relics Archive place. At present, the use on the market is step by step reducing.

The 3rd-technology aerosol (S type) is especially product of strontium salt as the main oxidant. As opposed to the 2nd-technology potassium salt (K-sort) aerosol, strontium ions usually do not take in moisture, tend not to variety a conductive Resolution, and will never result in harm to electrical equipment. In 2001, China Cellular Communications Corporation selected the strontium salt aerosol (S-kind aerosol automated fireplace extinguishing gadget) made by the corporate following stringent inspection and verification to safeguard its communication base stations along with other spots Outfitted with complex Digital products.

At this time, strontium salt aerosol merchandise happen to be used in A huge number of engineering tasks, and the 3rd-technology aerosol has grown to be more and more recognized by customers

Aerosol hearth extinguisher software variety

a. Electrical fireplace

Communication area, interaction foundation station, Digital Personal computer area, etcetera.;

Electrical fires in places that contains precision instruments and devices, for instance electric power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, etc.

b. Good surface area hearth

Floor hearth of combustible stable products in sites the place combustible strong supplies are applied or stored.

c. Liquid fire

Liquid fires in sites exactly where diesel oil is created, utilized or saved (apart from -35 diesel), large oil, transformer oil, animal and vegetable oil together with other flammable liquids of Class C; Ahead of extinguishing a fuel hearth, the fuel resource might be cut off.

Aerosol hearth suppression process software .

d. The S-style aerosol hearth extinguishing device can not be utilized to put out the next fires

①Substances which can be oxidized with out air, for instance nitrocellulose, gunpowder, etcetera.; Lively metals, which include potassium, sodium, magnesium, titanium, and many others.; compounds which can decompose by on their own, including certain peroxides, hydrazine, etcetera. Metallic hydrides, for instance potassium fluoride, sodium hydride, and so on. Normal substances, including phosphorus. Sturdy oxidants, which include nitrogen oxide, fluorine, and many others.

② Deep fire of combustible solid supplies.

③ Hearth in crowded locations, such as theaters, auditoriums, and so on.

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

⑤ Ultra-cleanse atmosphere, like pharmaceutical workshops, chip processing areas, health care rooms, etcetera.

Aerosol fire extinguishing Doing the job theory

The 4 factors of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The fireplace extinguishing system of fire extinguishing gas is to eliminate 1 or numerous from the four aspects of combustion.

The good fireplace extinguishing agent while in the S-type aerosol fireplace extinguishing machine is started out by energy, and it undergoes redox response to variety a lot of agglomerated fire extinguishing aerosols, and its composition is principally N2, a little number of CO2, and metal salt stable particles.

Aerosol fire extinguishing mechanism is as follows

System of endothermic cooling and hearth extinguishing

Steel salt particles absorb a large amount of warmth at higher temperatures, and go through Actual physical endothermic procedures including thermal melting and gasification. The flame temperature is reduced and afterwards radiated into 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 lower, as well as combustion response pace might be suppressed to a specific extent.

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