| 摘要 |
A method of converting a stacked FCC reactor-regenerator arrangement into a two-stage regenerator. In this method, a stacked FCC unit having a bottom regeneration vessel, a superadjacent reactor vessel, and a stripping vessel laterally offset from and in open communication with the reactor vessel are used to make a two-stage regenerator having a lower first stage of regeneration, an upper second stage regeneration vessel, and a catalyst cooler for moving heat from the catalyst. This method makes complete use of the three existing vessels in the stacked reactor regenerator arrangement by converting the upper reactor vessel into the second stage regeneration vessel and the stripping vessel into the catalyst cooler. Therefore, apart from the addition of a new reactor only relatively minor modifications are nesessary to convert the stacked reactor-regenerator arrangement into a two-stage regenerator. In this method, the stripping vessel can be converted into either a downflow type catalyst cooler or a backmix type catalyst cooler.
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