Patent ID: 6109342
Filing Date: 2000-08-29
Classification: B01J,F28D

Abstract:
An apparatus for carrying out a process, comprising:a reservoir provided with upwardly directed tubes accommodated, at top and bottom ends thereof, in tube plates, the tubes being in open communication with a top box and a bottom box;at least one distribution plate being arranged in the bottom box for supporting a fluidized bed of granular material maintainable in a quasi-stationary, fluidized condition by a medium to be treated or heated which is supplied via the bottom box and which flows through the tubes; andmeans for feeding fluidized bed particles back from the top box, in a form of a downcomer arranged outside the reservoir and connected, at the top end thereof, to the top box by a separating device, the downcomer having a separating device with a funnel-shaped bottom and, the bottom end of the downcomer being communicable, through switching on and off, with the bottom box of the reservoir, the downcomer being provided with means for effecting a natural circulation flow in the downcomer,wherein the means for effecting a natural circulation flow includes an inner tube having a smaller diameter and closed at a top end, the inner tube being open at a bottom end and provided, at a short distance below the top end, with outflow openings located at a level of the funnel-shaped bottom end of the separating device.