What’s Aerosol fire extinguishing

What is aerosol hearth extinguisher? Aerosol fire extinguishing technology is a completely new type of hearth extinguishing technologies created on the basis of military services pyrotechnics.

The first era of aerosol fire extinguishing technology was born within our country, often called smoke fire extinguishing technologies, which started during the early nineteen sixties. It was done by scientific scientists from the Tianjin Fireplace Research Institute of Community Safety, who independently formulated an automated smoke fire extinguishing program, which is principally utilized to extinguish fires at school A, B, and C liquid storage tanks.

While in the early eighties, With all the emergence of environmental security difficulties of “halon fire extinguishing agent”, getting possibilities to halon turned an essential investigation matter.

At the conclusion of the nineteen eighties, Russian scientists initial succeeded in researching aerosol fireplace extinguishing engineering that may extinguish fires within a submerged manner, which opened up a whole new way for halon substitution investigate. Subsequently, aerosol fire extinguishing technologies has captivated the eye with the Worldwide Group, and international locations for instance China, The us, Australia, Malaysia together with other nations around the world have also started study on new aerosol fireplace extinguishing technologies.

Most of the time, aerosol is really a stable state system fashioned by the dispersion of wonderful good or liquid particles in a fuel. Skillfully, it refers to some colloidal process that makes use of gas (typically air) given that the dispersion medium and strong or liquid particles since the dispersant.Popular aerosols in character—clouds, smoke, fog, and so forth.The scale in the particles in aerosols is mostly in the purchase of 10-5 to ten-1μm, that has gasoline fluidity and might diffuse close to hurdles.

The medicament inside the aerosol fire suppression technique gadget is solid, plus the part emitted through the medicament through the oxidation-reduction response is aerosol. The primary technology of aerosol fire extinguishing engineering-smoke fire extinguishing technology.

K-sort aerosol hearth extinguisher, also called potassium salt fireplace extinguishing engineering, is the second stage of the development of aerosol fire extinguishing know-how, which began in the previous Soviet Union in the mid-1960s. Our country commenced late Within this regard, starting in the early nineties.

In this type of aerosol generating agent, potassium nitrate is mainly utilised as the leading oxidant. Its sprays have superior fireplace extinguishing performance, but since they comprise a large amount of potassium ions, Easy to soak up dampness, forming a yellow and sticky sturdy alkaline conductive liquid movie, this compound may be very harmful to Digital tools, so K-variety aerosol computerized fireplace extinguishing device can not be Employed in electronic tools, precision devices and cultural relics Archive place. At the moment, the use out there is step by step lowering.

The third-era aerosol (S sort) is especially product of strontium salt as the key oxidant. Not like the 2nd-technology potassium salt (K-variety) aerosol, strontium ions tend not to take up humidity, never variety a conductive Alternative, and will likely not induce harm to electrical tools. In 2001, China Cellular Communications Corporation picked the strontium salt aerosol (S-variety aerosol computerized fire extinguishing product) produced by the corporation immediately after rigorous inspection and verification to shield its conversation foundation stations along with other sites Geared up with refined Digital devices.

At present, strontium salt aerosol products are utilized in Many engineering initiatives, plus the third-generation aerosol has grown to be An increasing number of approved by people

Aerosol fireplace extinguisher application vary

a. Electrical fireplace

Interaction space, communication foundation station, Digital Personal computer place, and so forth.;

Electrical fires in places containing precision devices and devices, which include power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and many others.

b. Good floor hearth

Surface area hearth of combustible strong components in spots where by combustible strong resources are applied or saved.

c. Liquid fireplace

Liquid fires in destinations the place diesel oil is created, utilised or saved (other than -35 diesel), weighty oil, transformer oil, animal and vegetable oil and other flammable liquids of Class C; Ahead of extinguishing a gas fireplace, the fuel resource is often Minimize off.

Aerosol hearth suppression method application .

d. The S-variety aerosol fireplace extinguishing unit can not be utilized to set out the next fires

①Substances that may be oxidized devoid of air, including nitrocellulose, gunpowder, and many others.; Energetic metals, like potassium, sodium, magnesium, titanium, etc.; compounds that may decompose by by themselves, for example sure peroxides, hydrazine, and so on. Metal hydrides, for example potassium fluoride, sodium hydride, and so forth. All-natural substances, like phosphorus. Sturdy oxidants, such as nitrogen oxide, fluorine, etcetera.

② Deep hearth of combustible reliable components.

③ Hearth in crowded places, for example theaters, auditoriums, etcetera.

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

⑤ Extremely-clear natural environment, such as pharmaceutical workshops, chip processing spots, professional medical rooms, and many others.

Aerosol hearth extinguishing Doing the job principle

The 4 elements of combustion: combustibles, oxidizer, temperature and uninhibited chain reaction. The fire extinguishing system of fire extinguishing gas will be to remove a single or numerous with the four components of combustion.

The solid hearth extinguishing agent in the S-type aerosol fire extinguishing system is began by energy, and it undergoes redox reaction to sort a large number of agglomerated fireplace extinguishing aerosols, and its composition is mainly N2, a small volume of CO2, and steel salt reliable particles.

Aerosol fire extinguishing mechanism is as follows

Mechanism of endothermic cooling and hearth extinguishing

Metal salt particles soak up a large amount of heat at large temperatures, and go through Actual physical endothermic procedures such as thermal melting and gasification. The flame temperature is reduced after which radiated to your combustible combustion surface for gasification of combustible molecules and vaporized combustible molecules. The warmth of pyrolysis of combustion molecules into free of charge radicals will reduce, along with the combustion reaction pace is going to be suppressed to a particular extent.

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