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OwnerRobert George Dunster, Simon John Davies +2inventors
InventorsRobert George Dunster, Simon John Davies, Robert James Lade, Julian Grigg
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A fire and explosion suppression system comprises a source (5) of high pressure water which is fed to a misting nozzle (13) or other water mist generating means at one input of a mixing unit (6), and a source (14) of high pressure inert gas, such as nitrogen, which is fed along a pipe (20) to another input of the mixing unit (6). Inside the mixing unit (6), water mist, in the form of an atomised mist of very small droplet size is mixed with the pressurised gas and exits the mixing unit (6) at high pressure and high velocity along a pipe (22) and is thence discharged through spreaders (26, 28). Separation of the mist production from the actual discharge of the mist, and the entraining and transporting of the mist between these two stages at high pressure and high velocity, produces an output mist of very small droplet size which is carried by the entraining and transporting high pressure gas into the area to be protected, enabling a total flooding capability.
A fire and explosion suppression system, comprising a source of liquid extinguishing agent (5) and a source (14) of pressurised inert gas, mist producing means (13;13A) connected to receive a flow of the liquid extinguishing agent to produce a mist therefrom, mixing means (6) for mixing the already-produced mist into a flow of the pressurised inert gas from the source (14) thereof to produce a discharge in the form of a two-phase mixture comprising a suspension of droplets of the mist in the pressurised inert gas, and transporting means (22) for transporting the two-phase mixture to separate discharge means.
A system according to any preceding claim, in which the discharge means comprises at least one outlet (26,28) and in which the transporting means comprises narrow pipe means (22) interconnecting the entraining means with the outlet.
A system according to any preceding claim, in which the mist producing means (13) and the source of the inert gas (14) are connected to the mixing means (6) by pipe means (20) and the mixing means (6) is at least one metre downstream of any flow restrictor in this pipe means (20).
A system according to any preceding claim, in which the mist producing means comprises a nozzle (13).
A fire and explosion suppression method, comprising the steps of producing a mist from a pressurised liquid extinguishing agent, mixing the already-produced mist into a flow of pressurised inert gas to produce a two-phase mixture comprising a suspension of droplets of the mist in the pressurised inert gas, and transporting the two-phase mixture for separate discharge.
A system or method according to any preceding claim, in which the pressurised gas is nitrogen.
Apparatus for producing a mist from a liquid, comprising an eductor (13A).
A method of producing a mist from a liquid, in which a gas is fed under pressure to an eductor (13A) to draw the liquid into the eductor (13A) to produce the mist.
Dependencies are inferred from the claim text.