| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a device and a method for controlling a treating apparatus by which a mean value within a certain definite period of time can be controlled below a prescribed value even when the process value temporarily deviates from a set value because of sudden change of the process value or the like and the consumption of a reducing agent such as ammonia can be suppressed to the minimum. <P>SOLUTION: The device for controlling a treating apparatus is provided with an additive controller 12 for controlling flow rate of the additive supplied to the treating apparatus, a concentration detector 14 for detecting residual concentration of a material to be treated at a downstream side of the treating apparatus or concentration of a product produced by reaction of the material to be treated and the additive, an instantaneous value control circuit 16 for controlling the additive controller so as to put a value A measured by the concentration detector near to a prescribed instantaneous value controlling set value B, and a time average control circuit 18 which performs biased operation to the instantaneous value controlling set value B so as to put a mean of the measured values A near to a prescribed time average controlling set value C within a prescribed time T. <P>COPYRIGHT: (C)2004,JPO |
