| 摘要 |
PURPOSE:To make a dust removing device unnecessary and contrive cost down by a method wherein a granular filter unit is arranged between the gas outlet port above a furnace 1 and the gas inlet port of an aft flue 24. CONSTITUTION:A granular filter 23 is arranged between the gas outlet port above a furnace 1 and the gas inlet port of an aft fue 24. A fluidizing agent 33, supplied into a reserving bottle 22, is supplied into a granular filter unit 23 by a feeder 25. The fluidizing agent arrests unburnt carbon, ash, desulfurizing agent or the like, contained in combustion gas 34, and forms a fluidized bed 2 in the furnace 1 through a circulating line 26 and a circulating amount controlling unit 27. A part of the fluidizing agent is taken out of a take-out port 28 and is supplied into a separator 29. The separated fluidizing agent is re- circulated into the reserving bottle 22 by a carrying line 30 and a carrying unit 31. A part of separated ash or the like is returned into the fluidized bed 2 through a retrieving line 35 while the balance of the arrested substances is discharged to the outcide of the title system through a discharging line 36.
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