Inerting method for preventing and/or extinguishing fire as...

A - Human Necessities – 62 – C

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Details

A62C 35/62 (2006.01) A62C 99/00 (2010.01)

Patent

CA 2736211

The invention relates to an inerting method as well as an inerting system (1) for preventing and/or extinguishing fire, wherein a gas separation system (3, 4) is provided to set and/or maintain a predefinable oxygen content, which is reduced compared to normal ambient air, in the spatial atmosphere of an enclosed room (2), said system separating off at least a portion of the oxygen contained in an initial nitrogen/oxygen gas mixture and thereby provide a nitrogenated gas mixture at the outlet (4a) of the gas separation system (3, 4). In order to achieve the setting and maintaining of a predefined inerting level with the lowest possible expenditure of energy, the invention provides for a control device (5) designed to control the gas separation system (3, 4) such that the residual oxygen content of the nitrogenated gas mixture is changed as a function of the oxygen content prevailing at that moment in the spatial atmosphere of the enclosed room (10).

L'invention concerne un procédé d'inertisation et une installation d'inertisation (1) pour la prévention et/ou l'extinction des incendies. Afin d'obtenir et/ou de maintenir dans l'atmosphère d'un local clos (2) une teneur en oxygène prédéterminée, réduite par rapport à l'air ambiant, il est prévu un système de séparation gazeuse (3, 4) dans lequel au moins une partie de l'oxygène est extraite d'un mélange gazeux initial contenant de l'azote et de l'oxygène et qui fournit ainsi à la sortie (4a) du système de séparation gazeuse (3, 4) un mélange gazeux enrichi en azote. Afin de pouvoir atteindre et maintenir un niveau d'inertisation prédéterminé avec une consommation d'énergie aussi faible que possible, il est prévu selon l'invention un dispositif de commande (5) qui est conçu pour piloter le système de séparation gazeuse (3, 4) de manière que la teneur résiduelle en oxygène du mélange gazeux enrichi en azote soit modifiée en fonction de la teneur en oxygène existant présentement dans l'atmosphère du local clos (10).

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