Constant Inert Nitrogen Fire Suppression

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IP.com Disclosure Number: IPCOM000115360D
Publication Date: 01-Apr-1995
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Publishing Venue

IBM Technical Disclosure Bulletin (TDB v38 n4 04-95 p455-460)

Related People

Fives, JE - Author
Endicott

Abstract

Nitrogen gas is oxygen depleting. Fire cannot occur in atmospheres where the oxygen content is less than 15%. Nitrogen may be used to suppress fires in manufacturing machines within companies. Constantly inert Nitrogen Fire Suppression Systems function in this manner.

Language

English (United States)

Country

United States

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6 pages / 121.0 KB

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Constant Inert Nitrogen Fire Suppression

      Nitrogen gas is oxygen depleting.  Fire cannot occur in
atmospheres where the oxygen content is less than 15%.  Nitrogen may
be used to suppress fires in manufacturing machines within companies.
Constantly inert Nitrogen Fire Suppression Systems function in this
manner.

      Nitrogen is admitted into the process enclosures from large
bulk supply systems serving other manufacturing needs.  This rapidly
reduces the oxygen level within the process.  When the redundant
oxygen meters, which read the process atmosphere, read a level of
less than 8%, the manufacturing pumps turn on and chemical is sprayed
onto the product through five micron spray nozzles.  This all occurs
in an oxygen depleted atmosphere where a fire cannot occur.

      If for any reason the nitrogen should leak from the process,
the oxygen meters will shut the spray pumps off when the oxygen level
reaches 8%.  At this point, the fuel is instantly removed leaving
nothing to ignite in the process.

      In dip tank operations, where components are raised and lowered
into tanks of chemicals, the Constantly Inert Nitrogen Fire
Suppression System works in this way.  Nitrogen is admitted to the
process enclosures when the redundant 02 meters read a level less
than 8% a solenoid valve opens filling the dip tanks with chemicals.
The product is then processed in a monitored oxygen depleted
atmosphere where fire cannot occur.  If the nitrogen gas e...

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