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Nitrogen extinguishing

Installation of nitrogen fire extinguishing on site

One of the modern fire extinguishing agents is nitrogen plants . This equipment is highly effective for the prevention and elimination of explosions and fires at oil and gas facilities, chemical, petrochemical and other enterprises. Nitrogen fire extinguishing installations are based on the latest generation of membrane technology. They are extremely effective systems designed to quickly eliminate a fire by supplying gaseous nitrogen to the room where a fire or explosion occurred.

Content

  • 1 Application
  • 2 Technology
  • 3 The oxygen content in the air at which the combustion of substances ceases
  • 4 Benefits
  • 5 disadvantages

Application

 
Mobile nitrogen station

The principle of operation of nitrogen fire extinguishing installations is to create an indoor environment with a reduced oxygen content of less than 10%, in such an environment the combustion process becomes impossible.

Nitrogen fire extinguishing installations are not only very effective - they can extinguish a fire in a few seconds, regardless of the remoteness of the source of fire, but are also unpretentious and reliable in operation. In many cases, they represent the only type of equipment applicable to extinguish hard-to-reach fires, such as in mines.

  • Oil and gas industry.

In the oil and gas complex, nitrogen fire extinguishing installations are used to create an inert environment in order to ensure explosion and fire safety in process tanks, during loading and unloading operations, before repairing equipment, and also directly to extinguish fires. In addition to this, the plants can be used for testing, purging pipelines, cleaning technological tanks, etc.

  • Chemical, petrochemical and paint industry.

In such industries as chemistry, petrochemistry and paint and varnish industry, nitrogen extinguishing systems are effectively used to create an inert atmosphere in tanks containing fire hazardous substances or substances that react with oxygen. When a fire occurs, the inert mixture is automatically fed into the volume where the fire occurred, and the combustion process stops.

  • The coal industry.
 
Mobile station for emergency response at mines, Ukraine

Mobile nitrogen extinguishing stations allow you to effectively deal with fires in mines, providing reliable volumetric extinguishing of inaccessible foci. Nitrogen systems make it possible in just a few hours to create an inert atmosphere based on nitrogen in the emergency section of the mine, in which the combustion process stops completely.

  • Museums, exhibitions, bank vaults.

In museums, galleries, exhibition halls, archives, libraries, bank vaults, nitrogen extinguishing installations provide rapid volumetric fire extinguishing. When using nitrogen fire extinguishing installations, unlike traditional fire extinguishing systems, values ​​stored in the premises are not harmed.

  • Premises with valuable electrical equipment.

The use of traditional water and foam fire extinguishing systems is unacceptable in rooms with expensive electronic equipment. Nitrogen extinguishing systems allow you to extinguish a fire almost instantly and keep valuable equipment intact.

Technology

The main element of nitrogen extinguishing systems is a membrane gas separation unit. The nitrogen produced by the gas separation unit from atmospheric air is supplied under pressure to the receiver, the volume of which is calculated on the basis of the dimensions of the premises or tanks in which explosion and fire safety are ensured. When they reach a certain nitrogen pressure, the unit turns off. In the event of a fire, nitrogen from the receiver is supplied indoors through the pipe wiring, which provides volumetric, quick and reliable fire fighting . The undoubted advantage of using nitrogen fire extinguishing installations is that as a result of the extinguishing, personnel are not exposed to danger and complete safety of material assets is ensured. As soon as nitrogen from the receiver was used to extinguish the fire, the installation immediately begins to replenish it.

A nitrogen fire extinguishing installation can be used to maintain a constant atmosphere composition with a certain allowable oxygen concentration in a room or tank. The use of nitrogen fire extinguishing installations for such tasks allows us to guarantee almost complete fire and explosion safety of objects ( phlegmatization ). In addition, the nitrogen produced by the installation can be used to purge process volumes, as well as for other purposes.

The oxygen content in the air at which the combustion of substances stops

SubstanceO 2 %
Acetone11.0
Petrol9.0
Benzene10
Butane9.5
Dimethylbutane9.5
Kerosene9.0
Methane9.5
Methyl acetate8.0
Pentane9.0
Propane9.0
Propylene9.0
Natural gas9.5
Jet fuel9.0
Ethane9.0

Benefits

  • No damage to equipment.

As a result of extinguishing a fire with a nitrogen installation, valuable equipment is not harmed, unlike foam and water fire extinguishing systems.

  • Volumetric fire extinguishing.

Provides volumetric fire extinguishing. The effectiveness of fire fighting does not depend on the inaccessibility of the source of fire.

  • Maintaining a safe atmosphere.

Nitrogen extinguishing systems can be used to maintain a constant fire and explosion-proof atmosphere.

  • Possibility of container execution.

Installation of nitrogen fire extinguishing can be performed in a container version based on a slide or chassis.

  • Full automation.

In the event of a fire, nitrogen from the receiver is automatically supplied to the room or process vessel where the fire occurred.

  • Easy to operate.

The units are very easy to operate and maintenance free. Fire fighting and subsequent filling of the receiver with nitrogen occurs without the direct involvement of a person.

  • No refueling required.

In the case of using nitrogen for fire fighting or technological needs, the installation replenishes the supply of nitrogen from the air.

  • Ecological cleanliness.

Nitrogen is an environmentally friendly gas, therefore, the use of nitrogen extinguishing systems does not have any harmful effects on the environment.

  • High mobility, tank independence.
  • Low maintenance.

Nitrogen is produced by installation from atmospheric air, as a result of which operating costs are very small.

Weaknesses

  • Large receiver capacity comparable to the volume of the room (under normal conditions)
  • The need to seal the room where the fire occurred
  • Nitrogen can cause choking
Source - https://ru.wikipedia.org/w/index.php?title= Nitrogen extinguishing&oldid = 78062437


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Clever Geek | 2019