To provide a gas ventilation method and gas ventilation apparatus for stabilizing the generation of nitrogen gas and oxygen enrichment air in a nitrogen producing apparatus, stabilizing the supply of oxygen enrichment air to utilization equipment, and suppressing noise of an aspiration means.
The gas ventilation apparatus includes: a nitrogen producing apparatus 1 for producing nitrogen gas by separation from raw material air; a blower 8 as an aspiration means for aspirating the oxygen enrichment air that is secondarily generated by the nitrogen producing apparatus 1; a compartment 5 for housing the blower 8; and an aerobic treatment vessel 19 as utilization equipment for utilizing the oxygen enrichment air. The oxygen enrichment air is caused to flow from an exhaust port 4a of the nitrogen producing apparatus 1 into the compartment 5 while the oxygen enrichment air is vented to the atmosphere, and the oxygen enrichment air in the compartment 5 is aspirated by the blower 8 housed in the compartment 5 and supplied to the aerobic treatment vessel 19.
COPYRIGHT: (C)2009,JPO&INPIT
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Daisuke Nagano
Kentaro Fujii