| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust gas treatment device capable of suppressing an increase of the generated amount of a sulfur oxide contained in exhaust gas discharged from a boiler even if an operation period of the boiler is prolonged. <P>SOLUTION: The exhaust gas treatment device includes the boiler 5 for burning fuel F; an air supply part 16 for supplying air A to the boiler 5; an O<SB POS="POST">2</SB>sensor 25 capable of detecting the concentration of oxygen contained in the exhaust gas E discharged from the boiler 5; a correlation map showing a correlation among the operation period of the boiler 5, the concentration of oxygen, and a conversion ratio for converting to sulfur trioxide by bonding oxygen and sulfur contained in the exhaust gas E; and an operation control device 9 capable of adjusting the supply amount of the air A supplied to the boiler 5 by controlling the sir supply part 16. The operation control device 9 obtains a target oxygen concentration from the correlation map based on the target conversion ratio in accordance with the operation period of the boiler 5, and adjusts the supply amount of the air A to the boiler 5 so that the oxygen concentration detected by the O<SB POS="POST">2</SB>sensor 25 is the target oxygen concentration. <P>COPYRIGHT: (C)2013,JPO&INPIT |
