Patent ID: 8460435
Filing Date: 2013-06-11
Classification: B01D,C01B

Abstract:
1. An apparatus for producing high-concentration ozone gas, comprising: an ozone generator; a plurality of adsorption/desorption columns packed with an ozone adsorbent for adsorbing ozone of ozonized gas generated by the ozone generator; gas supply means for allowing the ozonized gas generated by the ozone generator to flow into the plurality of adsorption/desorption columns; discharging means for discharging oxygen from the ozone adsorbent that has adsorbed the ozone in the adsorption/desorption columns; output means for allowing the ozonized gas, a concentration of which is increased when the oxygen in the adsorption/desorption columns is discharged, to flow out of the adsorption/desorption columns; and a plurality of valves capable of switching opening/closing of the passage of gas which is allowed to flow into or flow out of the adsorption/desorption columns, wherein each of the adsorption/desorption columns performs: ozone adsorption processing of allowing the ozone adsorbent to adsorb ozonized gas which is generated by the ozone generator and has a predetermined concentration exceeding an atmospheric pressure; evacuation processing of discharging oxygen from the ozone adsorbent which has absorbed ozone; and desorption processing of outputting the ozonized gas that is highly concentrated with ozone being discharged therefrom by vacuum desorption or heating desorption, wherein at least two of the plurality of adsorption/desorption columns are placed in a serial cycle arrangement to constitute a main adsorption/desorption column group, wherein one or more of the plurality of adsorption/desorption columns other than the at least two of the plurality of adsorption/desorption columns is placed in parallel with the main adsorption/desorption column group to constitute an auxiliary adsorption/desorption column, and wherein, in a period in which none of the at least two of the plurality of adsorption/desorption columns of the main adsorption/desorption column group is performing desorption processing, the auxiliary adsorption/desorption column performs desorption processing.