Patent ID: 6868294
Filing Date: 2005-03-15
Classification: B01D

Abstract:
1. An NH 3 injection rate control method for use in an NO x removal apparatus in which a correlation between a molar ratio of an NH 3 injection rate into said NO x removal apparatus with respect to an NO x flow rate at an inlet of said NO x removal apparatus and an NO x concentration at an outlet of said NO x removal apparatus shows a downwardly protrusive V-shaped characteristic curve on a plane where said molar ratio and said NO x concentration are expressed in the form of X-Y coordinates, said NH 3 injection rate control method for suppressing said NO x concentration to below a predetermined desired NO x concentration through the use of said NH 3 injection rate reaching a minimum comprising: a step of, when an operating area of said NO a step of implementing feedback control for adjusting said NH