Precisely what is Aerosol hearth extinguishing

What exactly is aerosol fire extinguisher? Aerosol hearth extinguishing technologies is a completely new kind of fireplace extinguishing engineering developed on The idea of military pyrotechnics.

The primary technology of aerosol fireplace extinguishing technology was born inside our region, also known as smoke fireplace extinguishing engineering, which started within the early nineteen sixties. It had been completed by scientific researchers from the Tianjin Fireplace Investigate Institute of Public Protection, who independently designed an automatic smoke hearth extinguishing system, which is mainly accustomed to extinguish fires in Class A, B, and C liquid storage tanks.

From the early nineteen eighties, Using the emergence of environmental security difficulties of “halon fire extinguishing agent”, locating possibilities to halon became a significant investigate topic.

At the conclusion of the 1980s, Russian scientists initially succeeded in researching aerosol fire extinguishing technological innovation which can extinguish fires in a submerged manner, which opened up a fresh way for halon substitution study. Subsequently, aerosol fireplace extinguishing engineering has attracted the eye of the Intercontinental community, and countries such as China, The usa, Australia, Malaysia and other nations around the world have also begun study on new aerosol hearth extinguishing systems.

Generally speaking, aerosol can be a steady point out system fashioned through the dispersion of high-quality reliable or liquid particles in a very gasoline. Professionally, it refers to some colloidal system that makes use of gas (usually air) as being the dispersion medium and strong or liquid particles as being the dispersant.Widespread aerosols in character—clouds, smoke, fog, etc.The size of your particles in aerosols is generally from the get of ten-5 to ten-oneμm, that has gasoline fluidity and will diffuse all-around obstacles.

The medicament from the aerosol fireplace suppression technique unit is good, as well as element emitted from the medicament with the oxidation-reduction response is aerosol. The very first generation of aerosol fireplace extinguishing technologies-smoke fire extinguishing technology.

K-kind aerosol fireplace extinguisher, also known as potassium salt fire extinguishing technologies, is the next stage of the development of aerosol fireplace extinguishing technological know-how, which commenced in the former Soviet Union from the mid-sixties. Our place commenced late Within this regard, setting up inside the early 1990s.

In this sort of aerosol generating agent, potassium nitrate is especially employed as the principle oxidant. Its sprays have high fireplace extinguishing effectiveness, but given that they incorporate a great deal of potassium ions, Straightforward to absorb humidity, forming a yellow and sticky potent alkaline conductive liquid movie, this material may be very damaging to Digital equipment, so K-type aerosol automated fire extinguishing machine can not be used in electronic gear, precision instruments and cultural relics Archive put. At this time, the use in the market is little by little decreasing.

The third-era aerosol (S sort) is especially made of strontium salt as the key oxidant. In contrast to the next-generation potassium salt (K-type) aerosol, strontium ions usually do not soak up moisture, will not kind a conductive Option, and will not trigger damage to electrical tools. In 2001, China Cellular Communications Corporation picked the strontium salt aerosol (S-form aerosol computerized fireplace extinguishing device) made by the corporate just after rigid inspection and verification to guard its conversation foundation stations and various destinations equipped with advanced Digital gear.

At present, strontium salt aerosol merchandise are actually applied in Many engineering initiatives, and also the 3rd-technology aerosol has grown to be Increasingly more recognized by buyers

Aerosol hearth extinguisher application assortment

a. Electrical hearth

Communication room, conversation foundation station, Digital Laptop area, and so on.;

Electrical fires in destinations made up of precision instruments and machines, such as ability distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and so forth.

b. Reliable surface fire

Floor fire of combustible solid elements in spots where combustible solid products are utilized or saved.

c. Liquid fire

Liquid fires in locations where diesel oil is made, used or stored (except -35 diesel), major oil, transformer oil, animal and vegetable oil along with other flammable liquids of Class C; Before extinguishing a gasoline fire, the gas source is often Minimize off.

Aerosol hearth suppression process application .

d. The S-sort aerosol fire extinguishing system can not be accustomed to set out the subsequent fires

①Substances which might be oxidized with out air, such as nitrocellulose, gunpowder, etcetera.; Energetic metals, for example potassium, sodium, magnesium, titanium, and so on.; compounds which can decompose by them selves, for example selected peroxides, hydrazine, etc. Metal hydrides, for example potassium fluoride, sodium hydride, etc. Organic substances, which include phosphorus. Powerful oxidants, including nitrogen oxide, fluorine, and so forth.

② Deep fireplace of combustible stable resources.

③ Hearth in crowded spots, including theaters, auditoriums, and so forth.

④ Hearth in spots with explosion hazard, which include workshops with explosive dust.

⑤ Extremely-thoroughly clean ecosystem, like pharmaceutical workshops, chip processing locations, medical rooms, and so on.

Aerosol fireplace extinguishing Operating principle

The four things of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The fireplace extinguishing system of fire extinguishing gas should be to get rid of 1 or numerous of the 4 things of combustion.

The strong hearth extinguishing agent while in the S-variety aerosol fireplace extinguishing system is started out by electrical power, and it undergoes redox reaction to variety a large number of agglomerated fire extinguishing aerosols, and its composition is especially N2, a little quantity of CO2, and metal salt stable particles.

Aerosol fire extinguishing mechanism is as follows

Mechanism of endothermic cooling and hearth extinguishing

Metallic salt particles absorb a large amount of heat at substantial temperatures, and go through Actual physical endothermic processes for example thermal melting and gasification. The flame temperature is lowered and after that radiated on the combustible combustion surface area for gasification of combustible molecules and vaporized combustible molecules. The warmth of pyrolysis of combustion molecules into no cost radicals will minimize, plus the combustion response pace might be suppressed to a certain extent.

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