METHOD AND APPARATUS FOR CONTROLLING THE AMOUNT OF A TREATMENT MEDIUM INTRODUCED IN ORDER TO REDUCE THE NITROGEN OXIDE CONTENT OF THE EXHAUST GASES FROM COMBUSTION PROCESSES

摘要

Method for controlling the amount of a treatment medium introduced intoa firing apparatus in order to reduce the nitrogen oxide content of exhaust gases fromcombustion processes. A mean nitrogen oxide content is calculated, and a first controlvariable is calculated as a function of the nitrogen oxide content for controlling theamount of treatment medium introduced. A second control variable is calculated as afunction of the handling medium slip for controlling the amount of treatment mediumintroduced. Then, either the first control variable or the second control variable is usedas the control variable for controlling the amount of treatment medium introduced.