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  • Gas fire extinguishing
    categories of news:Company news   作者:handler    发布于:2016-12-194    文字:【】【】【

    Gas fire extinguishing

       The development of modern metropolitan fire safety has penetrated into the details of our life and work, different areas, different equipment, different places to choose fire extinguishing agent at the same time liquid separation.

      CO2

    Carbon dioxide is the most common extinguishing gas (chemical formula: CO2) is a common greenhouse gas in the air, is a gaseous compounds, carbon and oxygen reaction to produce carbon dioxide chemical formula, carbon dioxide molecules from two oxygen atoms and a carbon atom through the covalent bond Key, at room temperature colorless and tasteless, no combustion, non-combustible gas, the density is greater than the air, slightly soluble in water, and water reaction carbonation. Carbon dioxide compression known as dry ice industry can be strongly decomposed by calcium carbonate, the laboratory generally use limestone (or marble) and dilute hydrochloric acid reaction system.

    Physical properties

    Liquid surface tension: 3.0 / cm

    Density: 1.816kg / m3

    Viscosity: 0.064 mPa · s

    Critical temperature: 31.06 ° C

    Critical pressure: 7.383MPa

    Critical volume: 10.6Kmol / m3

    The carbon dioxide fire extinguishing agent is a fire extinguishing agent with a history of more than 100 years. Cheap, easy to get, easy to prepare. It is mainly used as a choking effect and some cooling effect. Carbon dioxide has a high density of about 1.5 times the air. At atmospheric pressure, liquid carbon dioxide will evaporate immediately, usually 1 kg of liquid carbon dioxide can produce about 0.5 cubic meters of gas. Thus, the carbon dioxide gas can exclude air and surround it on the surface of the combustion object or in a more confined space. The oxygen concentration in the vicinity of the combustible or protective space is reduced to produce a choking effect. When the carbon dioxide is discharged from the storage container, the liquid evaporates rapidly Gas, part of the heat from the surrounding effects inhalation.

    Applicable places: liquid carbon dioxide fire extinguishers in the case of pressurized, liquid carbon dioxide into a small cylinder. This kind of fire extinguisher can be used to extinguish books such as books, precious equipment, precision instruments and so on.

    Disadvantages: Carbon dioxide is the main greenhouse gas. Because the role of carbon dioxide insulation, will gradually increase the temperature of the Earth's surface. Nearly a hundred years, the global temperature rose 0.6 ℃, according to this trend, is expected to the mid-21st century, the global temperature will rise 1.5-4.5 ℃. The rise in sea level caused by the greenhouse effect will also have a huge impact on the human environment. Polar sea ice will melt. All these changes are equal to all creatures.

    IG541

    IG541 is a mixture IG541 extinguishant consists of 52% nitrogen, 40% argon, 8% carbon dioxide composition of the three gas components, colorless, odorless, non-toxic, non-conductive gas, ozone depletion potential ODP = 0 greenhouse climate GWP = 0, the atmosphere is very short, is a green environment-type fire extinguishing agent.

    IG-541 mixed gas fire extinguishing system consists of fire automatic detectors, automatic alarm controller, automatic control device, fixed fire extinguishing device and pipe network, nozzle and other components, fire system boot mode is divided into automatic start, manual start and mechanical emergency start three The According to the use of requirements, can be composed of independent unit system, combined power distribution system, the use of full flooding way to achieve a single protected area, multi-protected area fire.

    Scope: Mainly applicable to computer rooms, communication rooms, power distribution rooms, oil-immersed transformers, own generators, libraries, archives, museums and cultural relics, cultural relics database, often work, can be used to combat fire, Liquid fires or dissolvable solid fires, solid surface fires and fire extinguishing can be used to cut off sources of natural gas sources, but can not be used to combat Class D reactive metal fires.

    IG-541 mixed gas fire extinguishing mechanism belongs to the physical fire mode: mixed gas released oxygen concentration decreased, can not burn to eliminate the fire source. Protected areas usually contain 21% oxygen and less than 1% carbon dioxide. When the oxygen in the reserve is less than 15%, most of the combustibles will stop burning. The mixed gas reduces the oxygen content in the reserve to 12.5% while increasing the carbon dioxide to 4%. The increase in the proportion of carbon dioxide, the body's breathing speed and oxygen capacity to supplement the atmosphere of low oxygen atmosphere. Fire extinguishing system

    Specifications Model:

    ZH80-15-SA

    ZH90-15-SA

    Extinguishant container volume:

    80L

    90L

    Fire fighting form:

    All submerged

    All submerged

    Filling pressure (20 ° C):

    15 Mpa

    15 Mpa

    Maximum working pressure (50 ° C):

    17.2 Mpa

    17.2 Mpa

    Spray time:

    ≤ 60s

    ≤ 60s

    System Operating Ambient Temperature:

    0 ° C to 50 ° C

    0 ° C to 50 ° C

    System startup mode:

    Automatic, electrical manual

    Automatic, electrical manual

    Power supply:

    DC24V, 1.5A

    DC24V, 1.5A

    HFC-227ea

    (HFC-227ea / FM200) is a chemical fire extinguishing agent, both the role of physical extinguishing agent, but also clean gas; colorless, tasteless, low toxicity, non-conductive, do not pollute protected objects, and cause equipment safety Damage; can reduce the concentration of fire, reliable B, C fire and electric fire; storage space is small, the critical temperature is high, the critical pressure is low, room temperature can be liquefied storage; or oily residue, no damage to the atmospheric ozone layer (ODP value Zero), the atmosphere stay for 31 to 42 years, in line with environmental requirements.

    Performance parameters:

    Physical performance

    unit

    Value

    Chemical Name

    Heptafluoropropane

    Chemical formula

    CF3CHFCF3

    Molecular weight

    170

    Boiling point at standard atmospheric pressure

    -16.4

    Freezing point

    -131

    Critical temperature

    101.7

    Critical pressure

    Kpa

    2912

    Critical volume

    CC / mole

    274

    Critical density

    Kg / m & sup3;

    621

    Steam pressure at 20 ° C

    Bar abs

    3.91

    20 ° C when the liquid density

    Kg / m & sup3;

    1407

    Saturated vapor at at 20 ° C

    Kg / m & sup3;

    31.173

    20 ° C, the standard atmospheric pressure overpressure steam specific capacity

    M & sup3 / kg

    0.1373

    acidity

    % (m / m)

    ≤ 3 × 10

    Do not evaporate the residue

    % (m / m)

    ≤ 0.01

    Suspended matter or precipitate

    Invisible

    Since heptafluoropropane does not contain chlorine or bromine, it will not damage the ozone layer of the atmosphere. Therefore, it is widely used as a fire extinguisher material for the important places such as halon 1301 and halon 1211 as fire extinguishing agent raw materials and engine indoor sevofluoropropane fire extinguishers. The life cycle of heptafluoropropane in the atmosphere is about 31 to 42 years, leaving no residue or grease after release, and can be removed through the normal exhaust channel, so it is suitable as a data center or a server storage center Extinguishing agent. These places will usually be a Containers of compressed heptafluoropropane cans are installed on the top of the floor. When a fire occurs, heptafluoropropane is discharged from the tank outlet, where the oxygen is placed and cooled, so the purpose of the fire is achieved. Heptafluoropropane S-type aerosols belong to two of the three kinds of gas fire.

    Heptafluoropropane, although relatively stable at room temperature, but at high temperatures will still break down, hydrogen fluoride decomposition, there will be pungent taste. Other combustion products include carbon monoxide and carbon dioxide.

    Contact with liquid heptafluoropropane can cause frostbite.

    Heptafluoropropane can also be used as a propellant for rocket launchers.

    Heptafluoropropane is used for inhalation doses for dispensing, such as inhalers for asthma therapy.

    Hexafluoropropane fire extinguishing agent with good cleanliness - completely evaporated in the atmosphere without residue, good gas-phase electrical insulation, suitable for full submerged fire to prevent fire, liquid fires or fusible solid fires, solid surface fires, before the fire Gas can cut off the gas fire, protect the computer room, communication room, substation power distribution room, precision room, generator room, oil depot, chemical flammable warehouse, library, database, archives, warehouses and other places. Heptafluoropropane gas fire extinguishing system is reasonable structure, reliable, has been widely used in electronic computer room, archives, program-controlled exchange room, television broadcasting center, financial institutions, government agencies and other important places.

    This article by the Guangzhou Rongan Fire Protection Equipment Co., Ltd. published

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Contact: Mr. Chen  Tel:13928768802  Mr. Huang  Phone:13711155165  Landline:020-31143089   fax:020-31143992   mailbox:1851885478@qq.com   Address: No. 15, Yongfeng Road, Shawan Town, Panyu District, Guangzhou City, Guangdong Province, China   Record license number:粤ICP备16114979

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