| 摘要 |
PROBLEM TO BE SOLVED: To facilitate the replacing work of heating tubes. SOLUTION: Exhaust gas piping 7 is connected with the top part of a pressurized fluidized bed boiler 2, and 90 deg.-bent exhaust gas piping 9 is detachably fitted to the exhaust gas piping 7. At the time of replacing a heating tube 5 inside the bed, the 90 deg.-bent exhaust gas piping 9 is detached, and the heating tube 5 inside the bed is replaced with the heating tube 12 inside the bed for replacement by using a lifting jig 11.
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