APPARATUS FOR CONTROLLING EXHAUST GAS TREATING DEVICE, EXHAUST GAS TREATING SYSTEM, PLANT WITH EXHAUST GAS TREATING SYSTEM, AND METHOD AND PROGRAM FOR CONTROLLING EXHAUST GAS TREATING DEVICE

摘要

PROBLEM 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.;SOLUTION: 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 x_P estimating 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 u_B by adding a state feed back control variable u_S obtained by multiplying an internal state quantity estimating value x_p by a state feed back gain -K_Sto an integral feed back control variable u_I obtained 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 -K_I. An ammonium injecting amount u is, for example, obtained by adding the feed back control variable u_B to a feed forward control variable u_W.;COPYRIGHT: (C)2009,JPO&INPIT