| 摘要 |
PURPOSE: An apparatus for use with fluid beds is provided in which the impact of the heat-exchange tubes on the fluidization characteristics of the fluid bed is reduced while retaining heat exchange capacity by using a defined arrangement of heat-exchange tubes. CONSTITUTION: The apparatus comprises a vessel having means for fluidizing a bed of fluidizable material within a fluidization zone in the vessel; and heat-exchange tubes located in the fluidization zone for removing heat from the fluidization zone and/or for providing heat to the fluidization zone, characterized in that the heat-exchange tubes are located longitudinally with respect to the axis of the fluidization zone with a rectangular pitch, one side of which having a length at least one and a half times the length of the other side and/or with a triangular pitch, having two sides each at least one and a half times the length of the shortest side. The apparatus for reacting at least one reactant with molecular oxygen-containing gas in the presence of a fluidized bed of catalyst comprises a reactor having: (a) means for fluidizing a bed of fluidizable catalyst within a fluidization zone in the reactor; (b) means for introducing at least one reactant into the reactor; (c) means for introducing a molecular oxygen-containing gas into a fluidized bed of catalyst in the fluidization zone in the reactor and contacting the at least one reactant with the molecular oxygen-containing gas in the presence of the fluidized bed of catalyst in the fluidization zone; and (d) heat-exchange tubes located in the fluidization zone longitudinally with respect to the axis of the fluidization zone with a rectangular pitch, one side of which having a length at least one and a half times the length of the other side and/or with a triangular pitch, having two sides each at least one and a half times the length of the shortest side.
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