| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide another mechanism for preheating because a preliminary catalytic reactor installed for the purpose of coping with situations, for example, when the amount of a tail gas to be treated is increased markedly more than that during an ordinary operation can not acquire sufficient catalyst performance during initial pass unless appropriate preheating is performed before passing the tail gas to be treated and therefore because there is a possibility that the substances to be treated remain in specified concentrations or higher in the exit gas. <P>SOLUTION: A plurality of catalytic reactors are installed in parallel with each other, and gas passing pipes are formed between the gas effuluent opening of the catalytic reactor that is operated during ordinary operation and the gas influent opening side of the catalytic reactor as a preliminary reactor. Because preheating can be performed by feeding the high-temperature gas discharged from the gas effuluent opening side of the catalytic reactor on operation through the pipe, the need to use high-temperature air or a heater separately prepared can be eliminated. Therefore, apparatus cost and energy cost can be reduced. <P>COPYRIGHT: (C)2010,JPO&INPIT |
