US4595567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling fluidized catalytic cracking regeneration zones with heat pipe apparatus
Assignee: Honeywell UOP LLC
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Filing: 1984-12-28
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Granted: 1986-06-17
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Expires: 2004-12-28
Abstract
Abstract An apparatus is presented for burning carbonaceous deposits off of fluidized particles. The apparatus is preferably employed as the catalyst regeneration zone of a fluidized catalytic cracking process. Heat pipes are used to cool the particles and transfer heat to an external steam generation zone. Preferably, the heat pipes extend vertically upward from an external catalyst transfer conduit to the steam generation chamber. The water level in the steam generation chamber or the density of the fluidized particles in contact with the heat pipes can be used to control the rate of heat removal from the combustion zone.
Inventors
- 👤 Brian W. Hedrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:14
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/08; B01J8/12; B01J8/125; C; C10; C10G; C10G11/00; C10G11/14; C10G11/18; C10G11/182; F; F22; F22B; F22B31/00; F22B31/0007
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
147 words
An apparatus for the combustion of carbonaceous materials present on fluidizable particles employed in a hydrocarbon conversion process which comprises: (a) means for confining a fluidized mass of said particles comprising a chamber, a particle inlet, a particle outlet, an oxygen-containing gas inlet and a flue gas outlet, with the flue gas outlet communicating with an upper end of the chamber; (b) a steam generating chamber having associated therewith a means to charge liquid water to the steam generation chamber and remove steam from an upper end of the steam generation chamber at a point above a level at which water would rest in a lower portion of the chamber; and, (c) a plurality of heat pipes, each heat pipe having a lower first end located within said means for confining the fluidized mass of particles and an upper second end located within said steam generation chamber.
Claim 2
Independent Claim
147 words
An apparatus for the combustion of carbonaceous materials present on fluidizable particles employed in a hydrocarbon conversion process which comprises: (a) means for confining a fluidized mass of said particles comprising a chamber, a particle inlet, a particle outlet, an oxygen-containing gas inlet and a flue gas outlet, with the flue gas outlet communicating with an upper end of the chamber; (b) a steam generating chamber having associated therewith a means to charge liquid water to the steam generation chamber and remove steam from an upper end of the steam generation chamber at a point above a level at which water would rest in a lower portion of the chamber; and, (c) a plurality of heat pipes, each heat pipe having a lower first end located within said means for confining the fluidized mass of particles and an upper second end located within said steam generation chamber.
Claim 3
Dependent Claim
47 words
The apparatus of claim 1 further characterized in that said means for confining the fluidized mass of particles comprises both an upper chamber and a lower chamber and means to transfer particles upward from the lower chamber to the upper chamber by fluidization in a gas stream.
Claim 4
Dependent Claim
22 words
The apparatus of claim 2 further characterized in that the first end of said heat pipes is located within said upper chamber.
Claim 5
Dependent Claim
44 words
The apparatus of claim 2 further characterized in that said means for confining the fluidized mass of particles also comprises a particle circulation conduit located external to the upper and lower chambers and providing a vertical flow path between the upper and lower chambers.
Claim 6
Dependent Claim
22 words
The apparatus of claim 4 further characterized in that the first end of said heat pipes is located within said upper chamber.
Claim 7
Dependent Claim
23 words
The apparatus of claim 4 further characterized in that the first end of said heat pipes is located within the particle circulation conduit.
Claim 8
Dependent Claim
32 words
The apparatus of claim 6 further characterized in that the steam generation chamber is located above the portion of the particle circulation conduit which contains the first end of said heat pipes.
Claim 9
Dependent Claim
22 words
The apparatus of claim 2 further characterized in that the apparatus is a catalyst regeneration zone of a fluidized catalytic cracking process.
Claim 10
Dependent Claim
43 words
The apparatus of claim 1 further characterized in that the apparatus also comprises means to regulate heat transfer by the heat pipes comprising a means to control the level of liquid-phase water in contact with said heat pipes in the steam generation chamber.
Claim 11
Independent Claim
179 words
An apparatus for the regeneration of catalyst used in a fluidized catalytic cracking process which comprises: (a) an upper chamber, with means being provided to withdraw a flue gas stream from an upper portion of the upper chamber and to withdraw regenerated particles from a lower portion of the upper chamber; (b) a lower chamber, with means being provided to pass used catalyst and an oxygen-containing gas stream into the lower chamber; (c) means to transfer fluidized catalyst upward from the lower chamber into the upper chamber; (d) a particle circulation conduit located externally to the upper and lower chambers, with the particle circulation circuit extending downward from a lower portion of the upper chamber to the lower chamber; (e) a steam generation chamber located outside of the upper and lower chambers; and (f) a plurality of heat pipes having a lower first end located in said particle circulation conduit and an upper second end located in said stream generation chamber, with a steam removal conduit being attached to the steam chamber at a point above the heat pipes.
Claim 12
Independent Claim
179 words
An apparatus for the regeneration of catalyst used in a fluidized catalytic cracking process which comprises: (a) an upper chamber, with means being provided to withdraw a flue gas stream from an upper portion of the upper chamber and to withdraw regenerated particles from a lower portion of the upper chamber; (b) a lower chamber, with means being provided to pass used catalyst and an oxygen-containing gas stream into the lower chamber; (c) means to transfer fluidized catalyst upward from the lower chamber into the upper chamber; (d) a particle circulation conduit located externally to the upper and lower chambers, with the particle circulation circuit extending downward from a lower portion of the upper chamber to the lower chamber; (e) a steam generation chamber located outside of the upper and lower chambers; and (f) a plurality of heat pipes having a lower first end located in said particle circulation conduit and an upper second end located in said stream generation chamber, with a steam removal conduit being attached to the steam chamber at a point above the heat pipes.
Claim 13
Dependent Claim
23 words
The apparatus of claim 10 further characterized in that the steam generation chamber is located above substantially all of the particle circulation conduit.
Claim 14
Dependent Claim
17 words
The apparatus of claim 11 further characterized in that the heat pipes have a substantially vertical orientation.
Claim 15
Dependent Claim
21 words
The apparatus of claim 11 further characterized in that a particle flow control means is located within the particle circulation conduit.
Claim 16
Dependent Claim
20 words
The apparatus of claim 10 further comprising means to control the liquid phase water level within the steam generation chamber.
Claim 17
Dependent Claim
23 words
The apparatus of claim 14 further comprising a means to supply a fluidizing gas into a lower portion of the particle circulation conduit.
Claim 18
Dependent Claim
24 words
The apparatus of claim 10 further characterized in that the apparatus comprises a means to pass an oxygen-containing gas stream into the upper chamber.
Claim 19
Dependent Claim
26 words
The apparatus of claim 16 further characterized in that the apparatus comprises a means to separately withdraw a second flue gas stream from said lower chamber.
Claim 20
Dependent Claim
57 words
The apparatus of claim 10 further characterized in that the apparatus comprises a means to regulate the rate of heat transfer through said heat pipes from the particle circulation conduit to the steam generation chamber which comprises a means to control the level of liquid-phase water in contact with said heat pipes in the steam generation chamber.
Claim 21
Independent Claim
150 words
An apparatus for the regeneration of catalyst used in a fluidized catalytic cracking process which comprises: (a) a means for confining a fluidized bed of catalyst comprising a vertically aligned first cylindrical chamber, a catalyst inlet conduit, a catalyst outlet conduit, an inlet conduit for an oxygen-containing gas stream and a flue gas outlet conduit; (b) a catalyst cooling chamber located outside said means for confining a fluidized bed of catalyst; (c) a catalyst transfer conduit extending between said first chamber and said catalyst cooling chamber; (d) a steam generation chamber; (e) a plurality of heat pipes, each heat pipe haivng a lower first end located within said catalyst cooling chamber and an upper second end located within the steam generation chamber and, (f) means to charge liquid water to the steam chamber and to collect and remove steam from the steam chamber at a point above the heat pipes.
Claim 22
Independent Claim
150 words
An apparatus for the regeneration of catalyst used in a fluidized catalytic cracking process which comprises: (a) a means for confining a fluidized bed of catalyst comprising a vertically aligned first cylindrical chamber, a catalyst inlet conduit, a catalyst outlet conduit, an inlet conduit for an oxygen-containing gas stream and a flue gas outlet conduit; (b) a catalyst cooling chamber located outside said means for confining a fluidized bed of catalyst; (c) a catalyst transfer conduit extending between said first chamber and said catalyst cooling chamber; (d) a steam generation chamber; (e) a plurality of heat pipes, each heat pipe haivng a lower first end located within said catalyst cooling chamber and an upper second end located within the steam generation chamber and, (f) means to charge liquid water to the steam chamber and to collect and remove steam from the steam chamber at a point above the heat pipes.
Claim 23
Dependent Claim
16 words
The apparatus of claim 19 further characterized in that the catalyst cooling chamber is vertically aligned.
Claim 24
Dependent Claim
24 words
The apparatus of claim 20 further characterized in that the catalyst transfer conduit is attached to an upper end of the catalyst cooling chamber.
Claim 25
Dependent Claim
19 words
The apparatus of claim 21 further characterized in that the steam generation chamber is superjacent the catalyst cooling chamber.
Claim 26
Dependent Claim
56 words
The apparatus of claim 22 further characterized in that a catalyst removal conduit is attached to a lower end of the catalyst cooling chamber and communicates with the means for confining a fluidized bed of catalyst at a lower elevation than said catalyst transfer conduit communicates with the first chamber thereby providing a catalyst recirculation conduit.
Claim 27
Dependent Claim
37 words
The apparatus of claim 19 further comprising a means for passing a fluidizing gas into the catalyst cooling chamber at a point below at least a portion of the heat pipes located within the catalyst cooling chamber.
Claim 28
Dependent Claim
41 words
The apparatus of claim 19 further comprising a means to control the level of liquid phase water present in the steam generation zone and to thereby regulate the amount of heat removed through the heat pipes from the catalyst cooling chamber.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-16 | 1989-12-16 | 1990-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-16 | 1993-12-16 | 1994-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-16 | 1997-12-16 | 1998-06-17 | $7700.00 | Window Closed / Lapsed |