Details It Is Advisable To Have Knowledge Of Aerosol Fire Extinguishing
Details It Is Advisable To Have Knowledge Of Aerosol Fire Extinguishing
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What is Aerosol fire extinguishing
What's aerosol fire extinguisher? Aerosol fire extinguishing technological innovation is a completely new form of fireplace extinguishing technological innovation developed on The idea of military services pyrotechnics.
The initial technology of aerosol fire extinguishing engineering was born inside our country, often called smoke fire extinguishing engineering, which started during the early 1960s. It had been concluded by scientific researchers with the Tianjin Fire Investigation Institute of General public Security, who independently designed an automatic smoke fire extinguishing process, which is especially used to extinguish fires at school A, B, and C liquid storage tanks.
From the early eighties, While using the emergence of environmental protection complications of “halon fire extinguishing agent”, locating solutions to halon became a vital study subject.
At the end of the 1980s, Russian scientists very first succeeded in exploring aerosol hearth extinguishing technological innovation which will extinguish fires in a very submerged way, which opened up a fresh way for halon substitution exploration. Subsequently, aerosol fire extinguishing technological innovation has attracted the attention of the international community, and countries such as China, America, Australia, Malaysia together with other international locations have also started study on new aerosol hearth extinguishing technologies.
Generally speaking, aerosol is actually a stable state procedure fashioned via the dispersion of great stable or liquid particles in a very gasoline. Professionally, it refers to a colloidal procedure that works by using gasoline (typically air) as the dispersion medium and solid or liquid particles as the dispersant.Prevalent aerosols in nature—clouds, smoke, fog, etcetera.The scale of your particles in aerosols is usually inside the get of 10-5 to ten-1μm, that has gas fluidity and will diffuse close to road blocks.
The medicament during the aerosol fire suppression program system is solid, as well as the part emitted because of the medicament in the oxidation-reduction response is aerosol. The very first generation of aerosol fire extinguishing technological innovation-smoke hearth extinguishing technologies.
K-variety aerosol fireplace extinguisher, also known as potassium salt fireplace extinguishing technologies, is the second phase of the event of aerosol fire extinguishing engineering, which began in the previous Soviet Union from the mid-nineteen sixties. Our nation began late Within this regard, starting during the early nineties.
In this type of aerosol building agent, potassium nitrate is especially made use of as the most crucial oxidant. Its sprays have superior hearth extinguishing efficiency, but since they include a great deal of potassium ions, Effortless to soak up humidity, forming a yellow and sticky solid alkaline conductive liquid movie, this material is extremely harming to electronic equipment, so K-form aerosol automatic fireplace extinguishing unit cannot be used in Digital equipment, precision instruments and cultural relics Archive put. At the moment, the use on the market is progressively lowering.
The 3rd-generation aerosol (S form) is especially fabricated from strontium salt as the main oxidant. Not like the 2nd-technology potassium salt (K-type) aerosol, strontium ions tend not to take in humidity, do not type a conductive solution, and is not going to lead to damage to electrical tools. In 2001, China Mobile Communications Company picked the strontium salt aerosol (S-variety aerosol automated fire extinguishing device) made by the corporate immediately after rigid inspection and verification to guard its communication foundation stations as well as other areas equipped with refined electronic machines.
At the moment, strontium salt aerosol solutions are utilized in A large number of engineering projects, as well as third-technology aerosol has grown to be A lot more acknowledged by consumers
Aerosol fire extinguisher software vary
a. Electrical fireplace
Interaction space, interaction base station, Digital computer home, and so forth.;
Electrical fires in destinations made up of precision instruments and devices, including power distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and so forth.
b. Solid surface area fireplace
Surface hearth of combustible stable supplies in destinations in which combustible good components are applied or stored.
c. Liquid fireplace
Liquid fires in locations where diesel oil is produced, utilised or saved (except -35 diesel), large oil, transformer oil, animal and vegetable oil and other flammable liquids of Class C; In advance of extinguishing a gas fire, the gasoline supply is usually Reduce off.
Aerosol hearth suppression technique application .
d. The S-form aerosol fireplace extinguishing device cannot be used to put out the following fires
1. Substances which can be oxidized devoid of air, which include nitrocellulose, gunpowder, etc.; active metals, like potassium, sodium, magnesium, titanium, and so on.; compounds that will decompose by on their own, for example specified peroxides, hydrazine, and many others. Steel hydrides, for example potassium fluoride, sodium hydride, and many others. Pure substances, for instance phosphorus. Solid oxidants, for instance nitrogen oxide, fluorine, and many others.
2. Deep hearth of combustible reliable components.
3. Fire in crowded locations, such as theaters, auditoriums, etc.
4. Fireplace in spots with explosion hazard, for example workshops with explosive dust.
5. Ultra-clean natural environment, which include pharmaceutical workshops, chip processing sites, professional medical rooms, and many others.
Aerosol fire extinguishing Operating principle
The four factors of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The fireplace extinguishing mechanism of fireplace extinguishing gas is to reduce one particular or numerous of the 4 components of combustion.
The good hearth extinguishing agent within the S-style aerosol hearth extinguishing unit is started out by electrical power, and it undergoes redox response to type a large number of agglomerated fireplace extinguishing aerosols, and its composition is principally N2, a little number of CO2, and metal salt good particles.
Aerosol hearth extinguishing system is as follows
Mechanism of endothermic cooling and fireplace extinguishing
Steel salt particles absorb a great deal of heat at high temperatures, and bear physical endothermic procedures like thermal melting and gasification. The flame temperature is decreased after which radiated into the combustible combustion surface area for gasification of combustible molecules and vaporized combustible molecules. The warmth of pyrolysis of combustion molecules into free of charge radicals will minimize, as well as the combustion response speed is going to be suppressed to a specific extent.
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