Patent ID: 6555072
Filing Date: 2003-04-29
Classification: B01D,C01B

Abstract:
An apparatus for producing ozone gas, comprising an ozone generating apparatus, and a pressure swing adsorbing apparatus having plural adsorbing layers filled with ozone adsorbent, wherein the ozone generating apparatus is a water electrolytic ozone generating apparatus, the ozone adsorbent is one or two or more kinds of adsorbent selected from the group consisting of high silica pentasyl zeolite, dealuminized fogersite, and mesoporous silicate, a compressor and a changeover valve are attached to a lead pipe for feeding gas containing oxygen for connecting the ozone generating apparatus to the adsorbing layers in an adsorbing process, a lead pipe for circulating oxygen concentrated gas flowing out from the adsorbing layers is connected to a hydrogen electrode chamber of the water electrolytic ozone generating apparatus through the changeover valve so as to depolarize the oxygen, a lead pipe for feeding purge gas branched off the lead pipe for circulating oxygen concentrated gas is connected to the adsorbing layers in a desorbing process through a reducing valve and changeover valve, and a control device is provided for changing over all the changeover valves to set the adsorbing layers alternately in the adsorbing process and desorbing process by connecting a lead pipe for recovering ozone to the adsorbing layers in the desorbing process through a changeover valve to recover ozone gas.