Patent ID: 8864878
Filing Date: 2014-10-21
Classification: B01D,C04B,Y02C,Y02E,Y02P

Abstract:
1. A method of cleaning an exhaust gas stream generated in a cement kiln, the method comprising: a) scrubbing in a scrubbing step a contaminant rich exhaust gas stream with a liquid absorbent such that a contaminant rich liquid absorbent is formed; b) cleaning the contaminant rich liquid absorbent by heating it to separate contaminant from the liquid absorbent, such that a contaminant lean liquid absorbent is regenerated; and c) recycling regenerated contaminant lean liquid absorbent for use in the scrubbing step; characterized in that the heating of rich liquid absorbent is at least partially effected using a hot exhaust gas stream generated in the cement kiln.