| 摘要 |
The method of controlling the flow of a fluidizable particulate solid, e.g., FCC catalyst, which comprises: (a) passing a fluidized stream of the particulate solid downwardly from a source of the particulate solid, e.g., an FCC regenerator, in a first conduit to a junction with a second conduit where the solid particulate is mixed with a stream of a fluid transport medium from a third conduit; (b) passing a stream of the resulting mixed solid particulate/transport medium upwardly in the second conduit at an angle less than 90 DEG from the first conduit for a distance at least as great as the diameter of the first conduit at the junction into a fourth conduit; (c) transporting the particulate solid/fluid transport medium stream in the fourth conduit to a desired location; and (d) controlling the mass flow of the particulate solid in the fourth conduit by setting the flow rate of the transport medium in the third conduit. By determining the temperatures of the particulate solid in the first conduit, the transport medium in the third conduit and the particulate solid transport medium mixture, the mass flow of the particulate solid in the fourth conduit may be controlled by setting the flow rate of the transport medium in the third conduit. Apparatus for carrying out the method is also included.
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