Exhaust gas treatment device control device, exhaust gas treatment system, plant with exhaust gas treatment system, and method of controlling the exhaust gas processing device and control program

摘要

PPROBLEM TO BE SOLVED: To enable feed back control which can cope with idle time when reducing a contaminating substance content by injecting ammonium into a gas containing nitrogen oxide and the like. PSOLUTION: An apparatus 25 for controlling an exhaust gas treating device is provided with an internal state estimating means 41 for calculating an internal state quantity estimated value xSBP/SBestimating the internal state quantity using a dynamic characteristics model prepared by modeling a variation over time of an internal state quantity variable in an exhaust gas treating device, and a feed back control variable accumulator 48 for calculating a feed back control variable uSBB/SBby adding a state feed back control variable uSBS/SBobtained by multiplying an internal state quantity estimating value xSBp/SBby a state feed back gain -KSBS/SBto an integral feed back control variable uSBI/SBobtained by multiplying a value v obtained by integrating a deviation e of an exhausted contaminating substance amount y from a target exhausted contaminating substance amount r by an integral gain -KSBI/SB. An ammonium injecting amount u is, for example, obtained by adding the feed back control variable uSBB/SBto a feed forward control variable uSBW/SB. PCOPYRIGHT: (C)2009,JPO&INPIT