Coal-fired power station
A coal-fired power station is provided and has a boiler that is heatable by dry firing, a catalytic converter for reducing an NO x 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.
1. A coal-fired power station, comprising:
a boiler 1 heatable by dry firing;
a catalytic converter 7 for reducing an NO x level;
a flue gas channel 6 for conducting a flue gas stream, wherein said flue gas channel adjoins the boiler 1 and leads to the catalytic converter 7 ; and
a coarse ash separator 16 disposed upstream of said catalytic converter 7 in a section 15 of said flue gas channel 6 , wherein said coarse ash separator 16 includes a sieve 17 that extends essentially over an entire cross-sectional area of said section of said flue gas channel, and wherein said sieve 17 is adapted to be deflected out of a position of rest by a flue gas stream and against the effect of a restoring force.
2. A coal-fired power station according to claim 1 , wherein a stop 18 is provided and defines said position of rest of said sieve 17 .
3. A coal-fired power station according to claim 1 , wherein said section 15 of said flue gas channel 6 in which said coarse ash separator 16 is disposed extends essentially horizontally, and wherein said sieve 17 of said coarse ash separator is hingedly suspended.
4. A coal-fired power station according to claim 3 , wherein a stop 18 that defines said position of rest of said sieve 17 is offset in a downstream direction relative to said hinged suspension of said sieve 17 .
5. A coal-fired power station according to claim 1 , wherein said section 15 of said flue gas channel 6 in which said coarse ash separator is disposed adjoins an ash funnel 5 , and wherein said coarse ash separator 16 is disposed at a transition of said ash channel 5 to said section 15 of said flue gas channel 6 .
6. A coal-fired power station, comprising:
a boiler 1 heatable by dry firing;
a catalytic converter 7 for reducing an NO x level;
a flue gas channel 6 for conducting a flue gas stream, wherein said flue gas channel adjoins the boiler 1 and leads to the catalytic converter 7 ; and
a coarse ash separator 16 disposed upstream of said catalytic converter 7 in a section 15 of said flue gas channel 6 , wherein said coarse ash separator 16 includes a sieve 17 that extends essentially over an entire cross-sectional area of said section of said flue gas channel, and wherein said sieve 17 forms folds 20 that are directed in an upstream direction relative to said flue gas stream and extend essentially parallel to one another.
7. A coal-fired power station according to claim 6 , wherein said folds 20 of said sieve 17 are formed by planar surface sections 19 that are disposed at an angle relative to one another.
8. A coal-fired power station according to claim 7 , wherein said surface sections 19 of said sieve 17 rest against support meshes 24 that are disposed in a downstream direction.
9. A coal-fired power station according to claim 8 , wherein said surface sections 19 of said sieve 17 , and said pertaining support meshes 24 , are drawn onto frames 21 that are secured to a support structure 22 .
10. A coal-fired power station according to claim 6 , wherein said section 15 of said flue gas channel 6 in which said coarse ash separator is disposed adjoins an ash funnel 5 , and wherein said coarse ash separator 16 is disposed at a transition of said ash channel 5 to said section 15 of said flue gas channel 6 .