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Sealing system for a fluid catalyst cracking regenerator

a technology of fluid catalyst and regeneration system, which is applied in the direction of physical/chemical process catalysts, furnaces, chemical/physical/physical-chemical processes, etc., can solve the problems of affecting the sealing effect of the primary seal, the design of the cone-shaped ring is not easy to inspect, and the configuration may have some drawbacks

Active Publication Date: 2016-02-04
UOP LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While these designs may be effective, it is believed that such a configuration may have some drawbacks.
For example, it has been observed that the weld between the riser and the ring has a tendency to crack as a result of the extreme temperatures in the internal riser and the weight of catalyst on top of the ring.
Additionally, the design of the cone-shaped ring does not easily allow for inspection of the primary seal.
Similarly, the design of the cone-shaped ring does not allow for easy removal of any catalyst that has accumulated under ring.

Method used

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  • Sealing system for a fluid catalyst cracking regenerator
  • Sealing system for a fluid catalyst cracking regenerator
  • Sealing system for a fluid catalyst cracking regenerator

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Embodiment Construction

[0035]An FCC regenerator has been developed in which a sealing system between the outer shell and an internal rise that solve some, if not all, of the drawbacks noted above. For example, one or more embodiments, provides a sealing system that allows for easy access to inspect the primary seal, as well as remove any catalyst accumulated thereon. Additionally, one or more embodiments provides a sealing system that accommodates the thermal expansion exhibited by the internal riser.

[0036]These and other benefits will be appreciated and understood more fully in the context of an FCC apparatus, such as the one shown in FIG. 1. The description of this invention in the context of the specific process arrangement shown is not meant to limit it to the details disclosed therein.

[0037]The FCC apparatus shown in FIG. 1 comprises a reactor vessel 10, a regenerator vessel 12 with an outer shell 13, and a reactor riser 16 that provides a pneumatic conveyance zone in which conversion takes place. Th...

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Abstract

A regenerator for an FCC apparatus. The regenerator includes a riser inside of a shell. The riser includes a cone and a cone skirt. An annulus is formed between the riser and the shell. A sealing system for keeping catalyst out of a portion of the annulus comprises a first sealing element and a second sealing element disposed above the second sealing element. The second sealing element comprises a ring having one or more plates being movable to accommodate the thermal expansion of the riser.

Description

FIELD OF THE INVENTION[0001]This invention relates generally to a fluid catalyst cracking (FCC) apparatus, and more particularly to a sealing system used in a regenerator for an FCC apparatus.BACKGROUND OF THE INVENTION[0002]Catalytic cracking is accomplished by contacting hydrocarbons in a reaction zone with a catalyst composed of finely divided particulate material. The reaction in catalytic cracking, as opposed to hydrocracking, is carried out in the absence of added hydrogen or the consumption of hydrogen. As the cracking reaction proceeds, substantial amounts of coke are deposited on the catalyst. The catalyst is regenerated at high temperatures by burning coke from the catalyst in a regeneration zone. Coke-containing catalyst, referred to herein as “spent catalyst”, may be continually transported from the reaction zone to the regeneration zone to be regenerated and replaced by essentially coke-free regenerated catalyst from the regeneration zone. Fluidization of the catalyst p...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B01J8/24B01J38/12
CPCB01J8/24B01J38/12B01J2208/00938B01J8/1863B01J8/26B01J8/003B01J8/0055B01J2208/0084B01J2208/00867B01J2208/00884B01J2208/00911B01J2208/00991B01J8/008F27D99/0073B01J2208/00495B01J19/0073
Inventor SANDACZ, MICHAEL S.STINE, MICHAEL A.LA VINE, MARK A.PADEN, MELVINWALKER, PATRICK D.ALTHOFF, JAMES W.
Owner UOP LLC