| 摘要 |
PURPOSE:To facilitate an operation corresponding to a wide load range, by a method wherein air dispersion tubes are installed in a plural number of stages in parallel to a heat transfer tube to change an air feed level in a fluidized bed. CONSTITUTION:A heat transfer tube 3 is installed in a fluidized bed 2, and each of air dispersion tubes 4A, 4B, and 4C, arranged in a vertical direction in a plural number of stages, is horizontally located between the two bent heat transfer tubes 3. One end of each of the dispersion tubes 4A-4C is closed, the other end is coupled to their respective common heaters 5A, 5B, and 5C, and the headers 5A, 5B, and 5C are connected to an air feed pipe 7 through valves 6A, 6B, and 6C, respectively. Meanwhile, a fuel feed pipe 8 is installed to the body side wall at the upper part of the fluidized bed, and a drain hole is formed and a valve 9 is located at a lower end. This permits an air feed level in the vertical direction of the air dispersion tube to change corresponding to a load. |
