| 摘要 |
A method of operating a circulating fluidized bed having a draught tube and a circulating fluidized bed apparatus (10) including a housing (12), a draught tube (14) and separate feeds (17, 34) for two different fluidising fluids involves feeding different fluids into the apparatus via the feeds (17, 34) when the housing (12) contains a charge of particulate material, causes fluidizing of the material and circulation of the fluidized material up the interior of the tube (14) and downwardly in the housing outside the tube; and causes two essentially different processes to take place in two essentially separate process zones in the bed, respectively inside and outside the tube (14). In accordance with the method the distribution of the two different fluidizing fluids is such that they are kept essentially separate at the inlet (14.1) to the tube (14), so that one of the fluids passes essentially only up the interior of the draught tube, and not upwards through the fluidized bed outside the draught tube, and the other fluid passes upwards essentially only up through the fluidized bed outside the draught tube and not up the interior of the draught tube. <IMAGE> |
