US4671806A
Expired / Lapsed
US
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Process and apparatus for cooling and purifying a hot gas containing slag particles
Assignee: Shell USA Inc
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Filing: 1986-01-06
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Granted: 1987-06-09
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Expires: 2006-01-06
Abstract
Abstract A process for cooling and purifying a hot gas containing slag particles comprises the following steps: (a) the velocity of the gas mixture is reduced; (b) the flow of the gas mixture having a reduced velocity is deflected, the gas mixture being passed upward in substantially vertical direction so that part of the slag particles falls down into a fluidized bed of slag particles; (c) cold clean recycle gas is introduced through a fluidization distributor into the fluidized bed, thereby cooling the slag particles and keeping at least part of the slag particles in the fluidized bed; (d) the gas mixture flowing substantially vertically upward at reduced velocity is cooled by indirect exchange of heat, while a further quantity of slag particles falls down into the fluidized bed; and (e) the cooled slag particles are discharged from the bottom of the fluidized bed through a discharge pipe. An apparatus to carry out this procedure is also described.
Inventors
- 👤 Jacob H. Stil
- 👤 Louis H. Turner, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:25
CPC Classifications
F; F23; F23J; F23J15/00; F23J15/02; B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/44; C; C10; C10J; C10J3/00; C10J3/46; C10J3/48; C10J3/52; C10J3/526; C10J3/72; C10J3/78; C10J3/82; C10J3/84; C10J3/86; F23J15/06; C10J2300/00; C10J2300/09; C10J2300/0913; C10J2300/093; C10J2300/0943; C10J2300/0946; C10J2300/18; C10J2300/1807; C10J2300/1823; Y; Y02; Y02E; Y02E20/00; Y02E20/30; Y10; Y10S; Y10S48/00; Y10S48/02
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
156 words
A process for cooling and purifying a hot gas containing slag particles comprising (a) reducing the velocity of the gas mixture; (b) deflecting the flow of the gas mixture having a reduced velocity in a deflection zone, and passing the deflected gas mixture upward in substantially vertical direction in such manner that part of the slag particles falls into a fluidized bed of slag particles; (c) introducing cold clean recycle gas into the fluidized bed, thereby cooling the slag particles and keeping at least part of the slag particles in the fluidized bed, and forming a gas mixture flowing substantially vertically upward which comprises said gas mixture and gas from said fluidized bed; (d) cooling the gas mixture flowing substantially vertically upward at reduced velocity by indirect exchange of heat, while a further quantity of slag particles falls down into the fluidized bed; and (e) discharging cooled slag particles from the bottom of the fluidized bed.
Claim 2
Dependent Claim
156 words
A process for cooling and purifying a hot gas containing slag particles comprising (a) reducing the velocity of the gas mixture; (b) deflecting the flow of the gas mixture having a reduced velocity in a deflection zone, and passing the deflected gas mixture upward in substantially vertical direction in such manner that part of the slag particles falls into a fluidized bed of slag particles; (c) introducing cold clean recycle gas into the fluidized bed, thereby cooling the slag particles and keeping at least part of the slag particles in the fluidized bed, and forming a gas mixture flowing substantially vertically upward which comprises said gas mixture and gas from said fluidized bed; (d) cooling the gas mixture flowing substantially vertically upward at reduced velocity by indirect exchange of heat, while a further quantity of slag particles falls down into the fluidized bed; and (e) discharging cooled slag particles from the bottom of the fluidized bed.
Claim 3
Dependent Claim
29 words
The process of claim 1 in which the hot gas has a temperature of from 300° C. to 1500° C., and a pressure of from 2 to 60 bar.
Claim 4
Dependent Claim
26 words
The process of claim 2 in which the hot gas flows downward in step (a) at an average linear velocity of from 4 to 20 m/s.
Claim 5
Dependent Claim
22 words
The process of claim 3 in which the hot gas has a slag particle content ranging from 1 to 20% by weight.
Claim 6
Dependent Claim
26 words
The process of claim 4 in which the quantity of cold, clean recycle gas employed is from 0.5 to 10 kg per kg of slag particles.
Claim 7
Dependent Claim
22 words
The process of claim 5 in which the cold, clean recycle gas has a temperature of from 70° C. to 200° C.
Claim 8
Dependent Claim
34 words
The process of claim 6 in which the average temperature of the cooled slag particles obtained by the injection of cold, clean gas into the fluidized bed is from 200° C. to 600° C.
Claim 9
Dependent Claim
40 words
The process of claim 7 in which the hot gas is introduced tangentially in the deflection zone, and the average linear velocity of the upflowing deflected gas mixture in step (b) has a value ranging from 1 to 19 m/s.
Claim 10
Dependent Claim
28 words
The process of claim 8 in which the gas mixture flowing substantially vertically upward has a slag particle content ranging from 0.1 percent to 18 percent by weight.
Claim 11
Dependent Claim
30 words
The process of claim 9 in which the gas mixture flowing substantially vertically upward is cooled by indirect heat exchange to a temperature ranging from 150° C. to 400° C.
Claim 12
Independent Claim
131 words
An apparatus for cooling and purifying a hot gas containing slag particles comprising (a) a substantially vertically-arranged heat exchanger having a gas outlet at the top thereof and a flow-deflection chamber at its bottom end; (b) a first supply pipe, for hot gas containing slag particles, the lower end of said first pipe communicating with the flow deflection chamber through the side wall of the flow-deflection chamber; (c) a second supply pipe, for cold clean recycle gas, the second pipe communicating with a fluidization distributor in the lower portion of the flow-deflection chamber and therethrough with the flow deflection chamber; and (d) means for discharge of slag particles, which means for discharge communicates with the lower portion of the flow-deflection chamber of the heat exchanger below the second supply pipe entry.
Claim 13
Independent Claim
131 words
An apparatus for cooling and purifying a hot gas containing slag particles comprising (a) a substantially vertically-arranged heat exchanger having a gas outlet at the top thereof and a flow-deflection chamber at its bottom end; (b) a first supply pipe, for hot gas containing slag particles, the lower end of said first pipe communicating with the flow deflection chamber through the side wall of the flow-deflection chamber; (c) a second supply pipe, for cold clean recycle gas, the second pipe communicating with a fluidization distributor in the lower portion of the flow-deflection chamber and therethrough with the flow deflection chamber; and (d) means for discharge of slag particles, which means for discharge communicates with the lower portion of the flow-deflection chamber of the heat exchanger below the second supply pipe entry.
Claim 14
Dependent Claim
30 words
The apparatus of claim 11 in which the center line of the first supply pipe for hot gas is at an angle ranging from 20° to 90° to the vertical.
Claim 15
Dependent Claim
31 words
The apparatus of claim 11 in which the bottom end of the supply pipe for the hot gas communicates in such manner that hot gas issues tangentially into the flow-deflection chamber.
Claim 16
Dependent Claim
30 words
The apparatus of claim 11 in which the internal diameter of the flow-deflection chamber is 2 to 4 times as large as the internal diameter of the first supply pipe.
Claim 17
Dependent Claim
51 words
The apparatus of claim 11 in which the first supply pipe is connected to the side wall of the flow-deflection chamber of the heat exchanger at a point located at a distance from the bottom of the flow-deflection chamber equalling 2 to 10 times the internal diameter of the supply pipe.
Claim 18
Dependent Claim
59 words
The apparatus of claim 11 in which the fluidization distributor at the bottom of the flow-deflection chamber has the form of a reversed double truncated cone, the outer cone communicating with the supply pipe for cold clean recycle gas, and the inner cone having openings for distributing the cold clean recycle gas into the bottom of the flow-deflection chamber.
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JPS5334111A
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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) | 1990-06-08 | 1990-12-08 | 1991-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-08 | 1994-12-08 | 1995-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-08 | 1998-12-08 | 1999-06-09 | $7700.00 | Window Closed / Lapsed |