Patent ID: 8062600

Claim:
An arrangement for separating coarse ash out of a flue gas stream, comprising: a catalytic converter for reducing an NO x level in said flue gas stream; a flue gas channel that leads to said catalytic converter; and a separator sieve disposed in said flue gas channel and extending essentially over an entire cross-section of said flue gas channel, wherein said separator sieve is provided with a plurality of gap-shaped openings for the passage of flue gas therethrough, 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, wherein said separator sieve is a bar screen having said openings, wherein said openings are delimited by parallel bars having an approximately triangular cross-sectional shape, wherein said parallel bars are interconnected, to form a rigid module, by tie bars that extend transverse to said parallel bars, and wherein said gap-shaped openings, when viewed in a direction of flow of flue gas therethrough, have a cross-sectional area that increases from an entry side to an exit side, wherein said flue gas channel includes a widened channel portion that accommodates said catalytic converter and extends essentially vertically, wherein said widened channel portion adjoins an essentially horizontal flue gas channel portion via a connection zone, wherein deflection elements are disposed in said connection zone, and wherein said separator sieve is disposed downstream of said deflection elements and upstream of said catalytic converter and wherein a flow straightening means is disposed in said widened channel portion upstream of said catalytic converter.