| 摘要 |
PROBLEM TO BE SOLVED: To provide a dust feeder capable of stably feeding dust in a simple constitution, without compacting or bridging it. SOLUTION: The dust feeder 3 for carrying dust thrown in a hopper 3a to a chute inlet 5a through a screw conveyer 4 disposed at a lowermost part of the hopper 3a and feeding it from the chute inlet 5a into a combustion furnace comprises an over-compaction checker 12 provided at a region for transferring the dust from the hopper 3a to the screw conveyer 4, for preventing the dust from being over-compacted at this region, a bridge breaker 13 provided at the chute inlet 5a for breaking bridges of the dust discharged from the screw conveyer 4 in the chute, a controller 14 for drive-controlling the over-compaction checker 12 and the bridge breaker 13, and means for detecting the temperature and the pressure in the combustion furnace 6. The controller 14 drives the over-compaction checker 12 and/or the bridge breaker 13, based on the detected temperature and/or pressure.
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