Patent US3910209A successfully refreshed from Google Patents.
US3910209A
Expired / Lapsed
US
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Fluidized bed furnace having fuel air supply lance and a fuel air supply lance construction
Assignee: Rheinstahl AG
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Filing: 1974-11-08
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Granted: 1975-10-07
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Expires: 1994-11-08
Abstract
Abstract A fluidized bed furnace for burning particularly sludges, comprises a housing having a bottom supporting a fluidized bed thereabove with wall means extending upwardly from the bottom and above the fluidized bed which define a combustion chamber thereabove. The tubular connection socket is connected into the wall means adjacent the bottom, preferably on a side thereof which is opposite to the inlet for the sludge material to be burned. A first outer tubular connection extends through the socket and is supported on, and sealed with, the socket and terminates in an inner end which extends into the furnace in the area of the fluidized bed. This first outer tube is connected to a first source of compressed air, and a second source of compressed air is connected to an inner lancing tube which extends through the outer tube and terminates in a discharge in the fluid bed area of the furnace. In addition, the outer tube is connected to a fuel supply and the second source of compressed air is regulated in accordance with the pressure conditions in the inner tube in order to regulate the pressure to provide adequate fuel feeding.
Inventors
- 👤 Erhard Albrecht
- 👤 Heinz Wilhelm Oepke
- 👤 Herbert Wulfmeier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:33
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/1818; B01J8/1827; F; F23; F23C; F23C10/00; F23C10/18; F23C10/22; F27; F27B; F27B15/00; F27B15/02; F27B15/14
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
212 words
A fluidized bed furnace particularly for burning sludges which have been dehydrated to some degree, comprising a housing having a bottom supporting a fluidized bed thereabove, wall means extending upwardly from said bottom above the fluidized bed and defining a combustion chamber thereabove, means for directing air through the bottom for maintaining the fluidized bed thereabove, a tubular connection socket connected into said wall means adjacent said bottom, a first outer tubular connection extending through said socket and supported and sealed therewith and terminating in an inner end extending into said furnace housing above said bottom in the area of said fluidized bed, said first outer tubular connection having a first compressed air connection adjacent its opposite outer end, a second inner tube extending through said first outer tubular connection and having an inner end terminating in a discharge in said furnace, and having an opposite outer end with a separate second compressed air connection, a fuel connection adjacent said opposite outer end of said second inner tube, pressure-sensing means in said second inner tube downstream of said second compressed air connection and said fuel connection, said sensing means being connected to said second compressed air connection to regulate the supply of air thereto in accordance with the pressure which is sensed.
Claim 2
Dependent Claim
212 words
A fluidized bed furnace particularly for burning sludges which have been dehydrated to some degree, comprising a housing having a bottom supporting a fluidized bed thereabove, wall means extending upwardly from said bottom above the fluidized bed and defining a combustion chamber thereabove, means for directing air through the bottom for maintaining the fluidized bed thereabove, a tubular connection socket connected into said wall means adjacent said bottom, a first outer tubular connection extending through said socket and supported and sealed therewith and terminating in an inner end extending into said furnace housing above said bottom in the area of said fluidized bed, said first outer tubular connection having a first compressed air connection adjacent its opposite outer end, a second inner tube extending through said first outer tubular connection and having an inner end terminating in a discharge in said furnace, and having an opposite outer end with a separate second compressed air connection, a fuel connection adjacent said opposite outer end of said second inner tube, pressure-sensing means in said second inner tube downstream of said second compressed air connection and said fuel connection, said sensing means being connected to said second compressed air connection to regulate the supply of air thereto in accordance with the pressure which is sensed.
Claim 3
Dependent Claim
25 words
A fluidized bed furnace, according to claim 1, wherein said lance tube extends horizontally through said wall means in the zone of said fluidized bed.
Claim 4
Dependent Claim
100 words
A fluidized bed furnace, according to claim 1, wherein said second compressed air connection is located downstream of said fuel connection and said pressure pick-off connection is located downstream of said second compressed air connection, said sensing means including a regulator, said second compressed air connection having a valve control connected to said regulator, means for applying an input value to said regulator for controlling the operation of said valve, said regulator acting in accordance with variation of pressure sensed by said sensing means and in accordance with the value of said input to regulate the opening of said valve.
Claim 5
Dependent Claim
43 words
A fluidized bed furnace, according to claim 1, wherein said first outer tubular connection extends into said furnace away from the interior walls thereof, said second tube extending with its inner end substantially to the inner end of said first outer tubular connection.
Claim 6
Dependent Claim
32 words
A fluidized bed furnace, according to claim 1, wherein said inner tube includes an outer end with a removable plug which may be removed to permit insertion of a cleaning tool therethroUgh.
Claim 7
Dependent Claim
139 words
A lance assembly for a fluidized bed furnace, comprising a first outer tubular member adapted to extend through the wall of the furnace and be sealed therewith and having an inner end adapted to be located within the furnace, said outer tubular member having a connection to a first pressure air supply, an inner tubular lance member located within and spaced from the interior walls of said outer tubular member and having an inner end terminating adjacent the inner end of said outer tubular member, said inner tubular member having a second pressure air supply connection, a fuel connection, and a pressure-sensing connection downstream of said fuel and compressed air connection, control means in said second pressure air connection connected to said pressure-sensing connection and being responsive to pressure-sensing for regulating the air flow through said inner tubular member.
Claim 8
Dependent Claim
139 words
A lance assembly for a fluidized bed furnace, comprising a first outer tubular member adapted to extend through the wall of the furnace and be sealed therewith and having an inner end adapted to be located within the furnace, said outer tubular member having a connection to a first pressure air supply, an inner tubular lance member located within and spaced from the interior walls of said outer tubular member and having an inner end terminating adjacent the inner end of said outer tubular member, said inner tubular member having a second pressure air supply connection, a fuel connection, and a pressure-sensing connection downstream of said fuel and compressed air connection, control means in said second pressure air connection connected to said pressure-sensing connection and being responsive to pressure-sensing for regulating the air flow through said inner tubular member.
Claim 9
Dependent Claim
36 words
A lance assembly for a fluidized bed furnace, according to claim 6, wherein said inner tubular member is provided with an outer end exteriorly of the outer end of said tubular member having a removable plug.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |