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i <br /> f MANUFACTURER DATA ON THERMAL OXIDIZER <br /> (REFERENCE: USTEC, September 20, 199 1) <br /> . f , <br /> �k <br /> ` 5.4 THERMAL OXIDATION UNIT <br /> The thermal oxidation unit is illustrated on Figure lb. A detailed description of the unit is <br /> presented in the following paragraphs. <br /> L � <br /> �. 3.4.1 Regenerative Oxidation Process <br /> The oxidizer bed consists of a reinforced, insulated, fabricated-steel chamber filled with silica <br /> gravel. Electrical heating elements are distributed in the bed. Passages are Iocated above and <br /> ! below the oxidizer bed to allow the process gas flow to be reversed through the bed. In order <br /> to avoid an uneven temperature distribution throughout the bed, the gas flow is controlled by <br /> an automatic valve that changes the direction of the gas flow at regular intervals typically <br /> i ranging from 50 to 480 seconds. This maintains a uniform temperature distribution throughout <br /> ' i <br /> the entire bed. Maximum heat recovery is obtained when incoming process gas is preheated <br /> ! through the exchange of exhaust gas heat energy within the silica-based oxidizer bed. <br /> 1 ?0 <br /> r <br /> 3 <br /> L <br />