US3565022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for regulating heat output from an oxidizing fluidized bed
Assignee: United States Department of the Interior
•
Filing: 1969-09-24
•
Granted: 1971-02-23
•
Expires: 1989-09-24
Abstract
Abstract Gas is injected into a localized area in an oxidizing fluidized bed boiler to fluidize a portion of the bed. By varying the relative pressures and flow rates of the locally injected gas supply and the main fluidizing gas supply a selected portion of the bed is fluidized, while the remainder of the bed remains in a static condition. Fuel distribution and combustion are restricted to the fluidized portion of the bed, making possible a wide range of thermal output variation.
Inventors
- 👤 John W Bishop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:41
CPC Classifications
F; F23; F23C; F23C10/00; F23C10/002; B; B01; B01J; B01J8/00; B01J8/18; B01J8/1818; B01J8/1836; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00106; B01J2208/00115; B01J2208/00141; B01J2208/00504
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
160 words
A method for controlling the thermal output of an oxidizing fluidized bed comprising: injecting a localized stream of gas into the bed at a point near the base of the bed; injecting a stream of fuel into the bed near the point at which the localized stream of gas is injected; injecting a distributed stream of gas into the bed from points spaced about the lower surface area of the bed; regulating the relative pressures and flow rates of the localized and distributed gas streams so that a selected fractional portion of the bed is fluidized, with at least some part of the fractional portion in contact with the stream of fuel; maintaining the fluidized portion of the bed above the minimum ignition temperature of the fuel; and whereby localized combustion takes place in the fluidized fractional portion of the bed, and the static portion of the bed remains substantially impervious to incursions by the fuel and localized gas stream.
Claim 2
Dependent Claim
82 words
A mEthod for controlling the thermal output of an oxidizing fluidized bed as claimed in claim 2, in which the step of regulating further comprises: regulating the pressure and flow rate of the localized stream of gas so that the localized stream of gas is sufficient alone to fluidize a fractional portion of the bed; and regulating the pressure and flow rate of the distributed stream of gas so that the distributed stream has a minimal effect upon fluidization of the bed.
Claim 3
Dependent Claim
104 words
A method for controlling the thermal output of an oxidizing fluidized bed as claimed in claim 2, in which the step of regulating further comprises: regulating the pressure and flow rate of the localized stream of gas so that the localized stream of gas is insufficient alone to fluidize any fractional portion of the bed; and regulating the pressure and flow rate of the distributed stream of gas so that the distributed stream of gas alone is insufficient to fluidize any portion of the bed, but in combination with the localized stream of gas is sufficient to fluidize a fractional portion of the bed.
Claim 4
Dependent Claim
113 words
A method for controlling the thermal output of an oxidizing fluidized bed as claimed in claim 2, in which the step of regulating further comprises: regulating the pressure and flow rate of the localized stream of gas so that the localized stream of gas is sufficient alone to fluidize a fractional portion of the bed; and regulating the pressure and flow rate of the distributed stream of gas so that the distributed stream of gas alone is insufficient to fluidize any portion of the bed, but in combination with the localized stream of gas is sufficient to fluidize a larger fractional portion of the bed than the localized stream of gas acting alone.
Claim 5
Dependent Claim
107 words
A method for controlling the thermal output of an oxidizing fluidized bed as claimed in claim 2, in which the step of regulating further comprises: regulating the pressure and flow rate of the localized stream of gas so that the localized stream of gas is insufficient alone to fluidize any fractional portion of the bed; and regulating the pressure and flow rate of the distributed stream of gas so that the distributed stream of gas alone is sufficient to fluidize only a fractional portion of the bed, and in combination with the localized stream of gas is sufficient to fluidize a larger fractional portion of the bed.
Claim 6
Dependent Claim
87 words
A method for controlling the thermal output of an oxidizing fluidized bed as claimed in claim 2, in which: the steps of injecting a localized stream of gas and injecting a stream of fuel are performed by injecting a mixture of gas, such as air or fluegas, and particulate fuel, such as coal, into the bed; and the step of injecting a distributed stream of gas into the bed comprises injecting a distributed stream of oxygen laden air into the bed to promote combustion within the bed.
Claim 7
Dependent Claim
87 words
A method for controlling the thermal output of an oxidizing fluidized bed as claimed in claim 3 in which: the steps of injecting a localized stream of gas and injecting a stream of fuel are performed by injecting a mixture of gas, such as air or fluegas, and particulate fuel, such as coal, into the bed; and the step of injecting a distributed stream of gas into the bed comprises injecting a distributed stream of oxygen laden air into the bed to promote combustion within the bed.
Claim 8
Dependent Claim
87 words
A method for controlling the thermal output of an oxidizing fluidized bed as claimed in claim 4 in which: The steps of injecting a localized stream of gas and injecting a stream of fuel are performed by injecting a mixture of gas, such as air or fluegas, and particulate fuel, such as coal, into the bed; and the step of injecting a distributed stream of gas into the bed comprises injecting a distributed stream of oxygen laden air into the bed to promote combustion within the bed.
Claim 9
Dependent Claim
87 words
A method for controlling the thermal output of an oxidizing fluidized bed as claimed in claim 5 in which: the steps of injeCting a localized stream of gas and injecting a stream of fuel are performed by injecting a mixture of gas, such as air or fluegas, and particulate fuel, such as coal, into the bed; and the step of injecting a distributed stream of gas into the bed comprises injecting a distributed stream of oxygen laden air into the bed to promote combustion within the bed.
Claim 10
Dependent Claim
86 words
A method for controlling the thermal output of an oxidizing fluidized bed as claimed in claim 6 which: the steps of injecting a localized stream of gas and injecting a stream of fuel are performed by injecting a mixture of gas, such as air or fluegas, and particulate fuel, such as coal, into the bed; and the step of injecting a distributed stream of gas into the bed comprises injecting a distributed stream of oxygen laden air into the bed to promote combustion within the bed.
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |