| 摘要 |
PURPOSE:To enable an accommodation to be performed against a variation in load etc. by a method wherein a height of upper fluidized bed is adjusted to vary its contact area with a heat transmitting pipe and a preparatory fluidized medium is always heated in advance at the lower fluidized bed layer and then it is kept at a suitable temperature. CONSTITUTION:A boiler is composed of a lower fluidized bed furnace 2 forming a fluidized bed 2A and an upper fluidized bed furnace 3 having a thermal conductive pipe 10 in the fluidized bed 3A, and a down pipe 6, lift pipe 7, descending pipe 8 and transporting device 9 are arranged to transfer the fluidized fluid between both fluidized beds, either air or mixture gas of air and steam is supplied to the lower fluidized bed furnace 2 from below the dispersion mechanism 27, the generated gas and oil are guided to the upper fluidized bed furnace 3, injected from the dispersion mechanism 28 upwardly so as to act the fluidized gas. Under variation in load, the height of the lower fluidized bed 2A is adjusted to vary the contact area with the thermal transmitting pipe. |
