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Nitrogen Interisation Plant called out to underground heating The nitrogen inertisation plant was called on recently on respond to a heating in a local underground coal mine. It can be operational within 4 hours from the initial call. Liquid nitrogen which is supplied by BOC gases is delivered by tanker from their facilities in Wollongong, Newcastle and Brisbane and stored onsite tanks to be used between deliveries. The plant heats liquid nitrogen to convert it to nitrogen vapour which is then introduced into the problem area by a bore hole. Up to 17 tonne per hour of liquid nitrogen per hour can be used to lower the oxygen content of the problem atmosphere to less than 2% where the heating can no longer sustain itself and extinguishment of the heating to allow the continuation of work. |
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