Patent ID: 7531143

Claim:
An arrangement for separating coarse ash out of a flue gas stream, comprising: a flue gas channel that includes a widened channel portion, wherein said widened channel portion of said flue gas channel extends essentially vertically and adjoins a narrower, essentially horizontally extending flue gas channel portion via a connection zone, wherein deflection elements are disposed in said connection zone; a catalytic converter for reducing an NO x level in said flue gas stream, wherein said catalytic converter is disposed in said widened channel portion of said flue gas channel, wherein a flow straightening means is disposed in said widened channel portion upstream of said catalytic converter; and a separator sieve disposed in said widened channel portion of said flue gas channel downstream of said deflection elements and upstream of said flow straightening means, wherein said separator sieve extends essentially over an entire cross-section of said widened channel portion, wherein said separator sieve is provided with a plurality of openings for the passage of flue gas therethrough, and wherein each of said openings has a cross-section that is smaller than a cross-section of coarse ash particles that are to be separated out.