What on earth is Aerosol hearth extinguishing
What on earth is aerosol fire extinguisher? Aerosol hearth extinguishing know-how is a brand new kind of fire extinguishing technological innovation made on The idea of armed forces pyrotechnics.
The primary generation of aerosol hearth extinguishing technologies was born in our state, generally known as smoke fire extinguishing technological know-how, which commenced in the early nineteen sixties. It was completed by scientific researchers through the Tianjin Fireplace Study Institute of Public Protection, who independently made an automatic smoke fireplace extinguishing method, which is mainly utilized to extinguish fires at school A, B, and C liquid storage tanks.
In the early nineteen eighties, Using the emergence of environmental defense troubles of “halon hearth extinguishing agent”, getting choices to halon became a vital analysis topic.
At the end of the eighties, Russian scientists first succeeded in investigating aerosol fireplace extinguishing technological know-how which will extinguish fires in a submerged manner, which opened up a completely new way for halon substitution study. Subsequently, aerosol fire extinguishing technological innovation has captivated the attention on the Worldwide Local community, and international locations like China, America, Australia, Malaysia along with other nations around the world have also begun study on new aerosol fireplace extinguishing technologies.
In most cases, aerosol can be a secure state process fashioned because of the dispersion of high-quality strong or liquid particles inside of a gas. Skillfully, it refers to the colloidal technique that uses gasoline (normally air) because the dispersion medium and good or liquid particles given that the dispersant.Typical aerosols in mother nature—clouds, smoke, fog, and many others.The scale from the particles in aerosols is generally during the buy of ten-five to ten-1μm, which has fuel fluidity and will diffuse all-around obstructions.
The medicament from the aerosol fire suppression process gadget is solid, as well as the component emitted by the medicament through the oxidation-reduction reaction is aerosol. The very first generation of aerosol fireplace extinguishing technological know-how-smoke hearth extinguishing technological innovation.
K-type aerosol hearth extinguisher, also known as potassium salt hearth extinguishing technologies, is the next phase of the event of aerosol hearth extinguishing technology, which began in the previous Soviet Union in the mid-nineteen sixties. Our region started out late in this regard, starting during the early nineties.
In this kind of aerosol building agent, potassium nitrate is mainly made use of as the primary oxidant. Its sprays have higher hearth extinguishing performance, but mainly because they include a large amount of potassium ions, Easy to absorb moisture, forming a yellow and sticky solid alkaline conductive liquid film, this material is very damaging to electronic products, so K-style aerosol computerized fireplace extinguishing system cannot be used in Digital devices, precision devices and cultural relics Archive put. At this time, the use on the market is step by step lowering.
The third-technology aerosol (S style) is principally made of strontium salt as the key oxidant. Not like the next-era potassium salt (K-variety) aerosol, strontium ions never take in humidity, will not form a conductive Option, and will not lead to harm to electrical machines. In 2001, China Cell Communications Company selected the strontium salt aerosol (S-kind aerosol computerized hearth extinguishing product) made by the business following stringent inspection and verification to safeguard its conversation foundation stations and various places Outfitted with complex electronic machines.
At this time, strontium salt aerosol products are actually used in A huge number of engineering jobs, plus the 3rd-era aerosol is becoming An increasing number of approved by people
Aerosol hearth extinguisher application range
a. Electrical fireplace
Conversation space, communication base station, electronic computer area, etcetera.;
Electrical fires in destinations made up of precision instruments and gear, for example electricity distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and many others.
b. Good floor hearth
Surface fireplace of combustible reliable supplies in destinations where combustible sound products are employed or stored.
c. Liquid hearth
Liquid fires in destinations in which diesel oil is manufactured, made use of or saved (except -35 diesel), weighty oil, transformer oil, animal and vegetable oil as well as other flammable liquids of Category C; Right before extinguishing a fuel fire, the gasoline resource may be Slice off.
Aerosol fire suppression program application .
d. The S-style aerosol fire extinguishing machine can not be used to place out the next fires
①Substances which might be oxidized with out air, which include nitrocellulose, gunpowder, and so forth.; active metals, like potassium, sodium, magnesium, titanium, etcetera.; compounds that will decompose by by themselves, such as specified peroxides, hydrazine, and so on. Steel hydrides, for instance potassium fluoride, sodium hydride, and so forth. Organic substances, for example phosphorus. Solid oxidants, like nitrogen oxide, fluorine, and many others.
② Deep hearth of combustible solid supplies.
③ Fireplace in crowded locations, for example theaters, auditoriums, and so forth.
④ Fire in spots with explosion hazard, such as workshops with explosive dust.
⑤ Extremely-thoroughly clean ecosystem, which include pharmaceutical workshops, chip processing destinations, medical rooms, and so on.
Aerosol fire extinguishing Operating principle
The four components of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The fire extinguishing system of fire extinguishing gas is always to do away with one particular or many with the 4 features of combustion.
The reliable hearth extinguishing agent in the S-style aerosol fireplace extinguishing gadget is started out by energy, and it undergoes redox response to kind numerous agglomerated fireplace extinguishing aerosols, and its composition is mainly N2, a small degree of CO2, and metallic salt strong particles.
Aerosol hearth extinguishing system is as follows
Mechanism of endothermic cooling and hearth extinguishing
Metallic salt particles take up a large amount of warmth at high temperatures, and undertake Bodily endothermic procedures including thermal melting and gasification. The flame temperature is reduced and after that radiated for the combustible combustion area for gasification of combustible molecules and vaporized combustible molecules. The warmth of pyrolysis of combustion molecules into free radicals will lessen, as well as the combustion response speed are going to be suppressed to a certain extent.
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