| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-temperature corrosion reducing apparatus for a circulating fluidized bed boiler capable of solving the problem of high-temperature corrosion of an external heat exchanger. SOLUTION: A circulating system of the circulating fluidized bed boiler comprises a first fluidized bed, a second fluidized bed and a third fluidized bed partitioned by partitioning walls 300 and 400 and containing fluidized beds formed by particles sent by a particle collection device. The first fluidized bed has a particle inlet tube and a fluidized air inlet port from the particle collection device, a first lower opening for introducing the particles to the second fluidized bed at a lower portion of the partitioning wall 300, a first upper opening for receiving air from the second fluidized layer at an upper portion thereof, and a circulating discharge port for discharging the particles and the fluidized air to a furnace at an upper portion of a side wall. The second fluidized bed has a fluidized air inlet port at an upper portion, and a second upper opening for introducing the particles to the third fluidized bed and receiving the fluidized air from the third fluidized bed at an upper portion of the partitioning wall 400. The third fluidized bed has the external heat exchanger within the fluidized bed, and a particle discharge port connected to the furnace through a fluidized air inlet port and a circulating line at a lower portion. COPYRIGHT: (C)2006,JPO&NCIPI
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