Exactly what is Aerosol hearth extinguishing
What exactly is aerosol hearth extinguisher? Aerosol fireplace extinguishing engineering is a whole new sort of fire extinguishing engineering made on The premise of army pyrotechnics.
The main generation of aerosol fire extinguishing know-how was born in our place, also called smoke fire extinguishing technology, which commenced in the early 1960s. It was finished by scientific scientists through the Tianjin Hearth Research Institute of General public Stability, who independently developed an computerized smoke fire extinguishing method, which is especially accustomed to extinguish fires in Class A, B, and C liquid storage tanks.
From the early nineteen eighties, Using the emergence of environmental safety complications of “halon fireplace extinguishing agent”, obtaining alternatives to halon turned a crucial exploration topic.
At the conclusion of the eighties, Russian scientists very first succeeded in looking into aerosol fireplace extinguishing technological innovation which will extinguish fires inside of a submerged manner, which opened up a whole new way for halon substitution investigate. Subsequently, aerosol fireplace extinguishing know-how has attracted the attention on the international Neighborhood, and international locations for example China, the United States, Australia, Malaysia along with other countries have also begun analysis on new aerosol fireplace extinguishing technologies.
Most of the time, aerosol is usually a secure point out procedure shaped with the dispersion of wonderful stable or liquid particles inside of a gas. Professionally, it refers to some colloidal system that works by using fuel (typically air) given that the dispersion medium and sound or liquid particles as the dispersant.Frequent aerosols in mother nature—clouds, smoke, fog, and so forth.The scale with the particles in aerosols is mostly during the purchase of 10-five to ten-1μm, which has gas fluidity and may diffuse all around hurdles.
The medicament from the aerosol fire suppression program machine is strong, as well as the ingredient emitted from the medicament in the oxidation-reduction response is aerosol. The main generation of aerosol fireplace extinguishing technological know-how-smoke hearth extinguishing technology.
K-type aerosol fireplace extinguisher, also referred to as potassium salt fireplace extinguishing technological innovation, is the next stage of the development of aerosol fire extinguishing technological know-how, which began in the previous Soviet Union within the mid-1960s. Our place started out late On this regard, beginning while in the early nineties.
In this type of aerosol generating agent, potassium nitrate is especially made use of as the most crucial oxidant. Its sprays have substantial fireplace extinguishing performance, but since they comprise a large amount of potassium ions, Quick to absorb dampness, forming a yellow and sticky powerful alkaline conductive liquid movie, this material is very harmful to Digital products, so K-type aerosol computerized fire extinguishing system can't be used in Digital tools, precision instruments and cultural relics Archive spot. At this time, the use available in the market is gradually lowering.
The 3rd-technology aerosol (S sort) is especially crafted from strontium salt as the principle oxidant. Compared with the next-era potassium salt (K-type) aerosol, strontium ions usually do not take in dampness, do not variety a conductive Answer, and will not induce damage to electrical products. In 2001, China Mobile Communications Company selected the strontium salt aerosol (S-sort aerosol automated hearth extinguishing machine) made by the business after demanding inspection and verification to protect its communication foundation stations together with other destinations Geared up with complex Digital equipment.
At this time, strontium salt aerosol solutions have been applied in 1000s of engineering tasks, as well as the third-technology aerosol is now more and more approved by users
Aerosol fire extinguisher software variety
a. Electrical hearth
Interaction room, communication foundation station, Digital Computer system place, and many others.;
Electrical fires in spots made up of precision instruments and products, which include ability distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and so forth.
b. Good surface area fire
Surface fire of combustible stable supplies in destinations where by combustible strong elements are made use of or saved.
c. Liquid hearth
Liquid fires in spots in which diesel oil is manufactured, employed or saved (apart from -35 diesel), hefty oil, transformer oil, animal and vegetable oil along with other flammable liquids of Category C; Just before extinguishing a gasoline fireplace, the fuel source might be cut off.
Aerosol fire suppression system application .
d. The S-kind aerosol fireplace extinguishing product can't be accustomed to place out the following fires
①Substances which can be oxidized with out air, which include nitrocellulose, gunpowder, etcetera.; Lively metals, including potassium, sodium, magnesium, titanium, etcetera.; compounds that will decompose by on their own, like sure peroxides, hydrazine, etc. Metallic hydrides, which include potassium fluoride, sodium hydride, etc. Normal substances, such as phosphorus. Strong oxidants, including nitrogen oxide, fluorine, and many others.
② Deep fire of combustible strong materials.
③ Hearth in crowded sites, such as theaters, auditoriums, etcetera.
④ Fire in spots with explosion hazard, for example workshops with explosive dust.
⑤ Ultra-clear environment, including pharmaceutical workshops, chip processing spots, medical rooms, and so forth.
Aerosol fireplace extinguishing Doing the job principle
The four factors of combustion: combustibles, oxidizer, temperature and uninhibited chain reaction. The fire extinguishing mechanism of fire extinguishing fuel is to eliminate just one or numerous with the 4 components of combustion.
The stable hearth extinguishing agent within the S-kind aerosol fire extinguishing gadget is commenced by electricity, and it undergoes redox reaction to variety numerous agglomerated fireplace extinguishing aerosols, and its composition is principally N2, a little level of CO2, and metallic salt stable particles.
Aerosol fire extinguishing mechanism is as follows
Mechanism of endothermic cooling and fire extinguishing
Metal salt particles take in a great deal of warmth at high temperatures, and bear Bodily endothermic processes for instance thermal melting and gasification. The flame temperature is lowered then radiated to the combustible combustion floor for gasification of combustible molecules and vaporized combustible molecules. The heat of pyrolysis of combustion molecules into free radicals will decrease, as well as the combustion response pace is going to be suppressed to a specific extent.
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