Claims
- 1. An apparatus for the fluidized catalytic cracking of a heavy feed to lighter, more valuable products comprising:
- a regenerator vessel,
- a riser reactor having an inlet in a base thereof for a heavy crackable feed, and an inlet for regenerated catalyst withdrawn from and connected to said, and an outlet in an upper portion thereof for cracked vapor products and spent catalyst;
- a reactor vessel connected to said riser reactor, receiving and separating said cracked vapor products and spent catalyst discharged from said riser reactor, and having an outlet in an upper portion thereof for vapor and a spent catalyst outlet in a lower portion thereof for spent catalyst;
- a catalyst stripper, beneath said reactor vessel and supported by said regenerator vessel, having an inlet in an upper portion thereof for spent catalyst discharged from and connected to said spent catalyst outlet of said reactor vessel, an inlet for stripping gas in a lower portion thereof, and an outlet in a lower portion thereof for stripped catalyst;
- a vertical, stripped catalyst standpipe, having a vertical axis, beneath the catalyst stripper having a stripped catalyst inlet in an upper portion thereof for stripped catalyst discharged from said catalyst stripper outlet and a standpipe outlet in a lower portion thereof;
- said catalyst regenerator vessel, contiguous with and beneath and supporting said stripper, containing said vertical stripped catalyst standpipe;
- a catalyst transfer vessel at least partially below said regenerator vessel, said catalyst transfer vessel having a spent catalyst inlet connective with said vertical standpipe outlet having a fluidization gas inlet, and a transfer vessel outlet for catalyst and fluidizing gas;
- a spent catalyst transfer line having an inlet connective with said transfer vessel outlet and a spent catalyst transfer line outlet;
- a coke combustor at an elevation above said transfer vessel having an inlet connective with said spent catalyst transfer line outlet, an inlet for regeneration air in a lower portion thereof, and an outlet in an upper portion thereof for partially regenerated catalyst and flue gas; and
- a coke combustor flue gas and catalyst transfer line having an inlet for partially regenerated catalyst and flue gas discharged from said coke combustor outlet and having an outlet connected to said regenerator vessel.
- 2. The apparatus of claim 1 wherein said vertical stripper standpipe is axially aligned with and enclosed by a vertical cylindrical regenerated catalyst and flue gas separation means having a vertical axis at least partially encompassing said catalyst stripper standpipe and having an upper annular opening within said regenerator vessel and said separation means having an inlet on a side thereof connective with said outlet of said coke combustor flue gas and catalyst transfer line.
- 3. The apparatus of claim 2 further comprising means to transfer hot regenerated catalyst from said regenerator vessel down to said transport vessel.
- 4. The apparatus of claim 3 wherein said catalyst transfer means transferring hot regenerated catalyst from said regenerator vessel down to said transport vessel is a fixed flow catalyst transfer means.
- 5. The apparatus of claim 4 wherein said fixed flow catalyst transfer means consists essentially of an open pipe connecting said regenerator vessel to said transport vessel.
- 6. The apparatus of claim 8 further comprising a seal means connective with the lower annular outlet of the partially regenerated catalyst flue gas disengaging means.
- 7. The apparatus of claim 6 wherein the seal means comprises a seal well adapted to encompass said lower annular outlet and permit catalyst to overflow said seal well into said regenerator vessel.
- 8. An apparatus for the fluidized catalytic cracking of a heavy feed to lighter, more valuable products comprising:
- a regenerator vessel,
- a riser reactor having an inlet in a base thereof for a heavy crackable feed, and an inlet for regenerated catalyst from said regenerator vessel, and an outlet in an upper portion thereof for cracked vapor products and spent catalyst;
- a reactor vessel, connected to said riser reactor, receiving said cracked vapor products and spent catalyst discharged from said riser reactor, for separating cracked products from spent catalyst, and having an outlet for cracked product vapors and a spent catalyst outlet in a lower portion thereof for spent catalyst;
- a catalyst stripper, beneath said reactor vessel and supported by said regenerator vessel, having an inlet in an upper portion thereof for spent catalyst discharged from and connected to said spent catalyst outlet of said reactor vessel, an inlet for stripping gas in a lower portion of said stripper, and an outlet in a lower portion thereof for stripped catalyst;
- a vertical, stripped catalyst standpipe having a vertical axis beneath said catalyst stripper having a stripped catalyst inlet in an upper portion thereof for stripped catalyst discharged from said catalyst stripper outlet and a standpipe outlet in a lower portion thereof;
- said catalyst regenerator vessel contiguous with and beneath and supporting said stripper, containing said vertical stripped catalyst standpipe;
- a catalyst transfer vessel with an elevation at least partially below said regenerator vessel, said catalyst transfer vessel having a spent catalyst inlet connective with said vertical standpipe outlet and further having a fluidization gas inlet, and a transfer vessel outlet for catalyst and fluidizing gas;
- a spent catalyst transfer line having an inlet connective with said transfer vessel outlet and having a transfer line outlet;
- a coke combustor at an elevation above said transfer vessel having an inlet connective with said spent catalyst transfer line outlet, an inlet for regeneration air in a lower portion thereof, and an outlet in an upper portion thereof for partially regenerated catalyst and flue gas;
- a coke combustor transfer line having an inlet for partially regenerated catalyst and flue gas discharged via said coke combustor outlet and having an outlet within said regenerator vessel;
- a catalyst/flue gas disengaging means within said renegerator vessel and comprising a vertical cylinder having a vertical axis and axially aligned with and at least partially enclosing said vertical spent catalyst standpipe, said disengaging means having an inlet connective with said coke combustor transfer line outlet, and having upper and lower annular outlets within said regenerator vessel.
Parent Case Info
This is a division of copending application Ser. No. 07/515,943, filed on Apr. 27, 1990, and now U.S. Pat. No. 5,047,140, issued Sep. 10, 1991.
US Referenced Citations (8)
Non-Patent Literature Citations (1)
Entry |
Oil & Gas Journal, "Fluid Catalytic Cracking Report", by A. Avidan & M. Edwards & H. Owen. |
Divisions (1)
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Number |
Date |
Country |
Parent |
515943 |
Apr 1990 |
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