Abstract: A coal-fired power station is provided and has a boiler that is heatable by dry firing, a catalytic converter for reducing an NOx level, a flue gas channel that adjoins the boiler and leads to the catalytic converter, and a coarse ash separator disposed upstream of the catalytic converter in a section of the flue gas channel, which includes a sieve that extends essentially over an entire cross-sectional area thereof. The sieve is adapted to be deflected out of a position of rest by a flue gas stream and against the effect of a restoring force, and/or the sieve forms folds that are directed in an upstream direction relative to a flue gas stream and extend essentially parallel to one another.

Abstract: The invention relates to a coal-fired power station which is heated by dry firing and which comprises a boiler (1) which is connected to a dentrification catalyst (7) by means of a smoke-gas channel (6). A coarse ash separator (16) is arranged on the transition point between an ash funnel (5) of the boiler (1) and a horizontal section (15) of the smoke-gas channel (6), said coarse ash separator comprising an oscillatingly suspended sieve (17) and a stop (18) defining the neutral position of the sieve (17). The smoke-gas channel sets the sieve (17) in a pendular motion, whereby coarse ash particles are separated from the sieve and pass into the ash funnel (5). Said effect is improved by causing the sieve (17) to strike against the stop (18) during the pendular movement thereof. The sieve (17) also forms folds for enlarging the sieve surface and for increasing automatic cleaning effects. Said folds are directed counter to the direction of flow.