Patent US5020451A successfully refreshed from Google Patents.
US5020451A
Expired / Lapsed
US
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Fluidized-bed combustion furnace
Assignee: IHI Corp
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Filing: 1990-10-03
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Granted: 1991-06-04
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Expires: 2010-10-03
Abstract
Abstract A fluidized-bed incineration system is disclosed wherein complete combustion of fluctuating furnace charge is achieved through the use of an invented system that includes a feedback control apparatus to regulate the variable quantities of air required for treating fluctuating volumes of products of combustion processes; the combustion control is triggered by a feedback apparatus incorporating the computed measurements of radiative energy or furnace pressure in combination with dynamic oxygen measurements.
Inventors
- 👤 Kunji Maebo
- 👤 Shigeru Hirabayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:22
CPC Classifications
F; F23; F23N; F23N1/00; F23N1/02; F23N1/022; F23N5/00; F23N5/003; F23N5/006; F23N2223/00; F23N2223/08; F23N2225/00; F23N2225/04; F23N2237/00; F23N2237/18; F23N5/02; F23N5/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
92 words
A means for providing a feedback control system of combustion processes in a fluidized-bed incinerator wherein a solid furnace charge is converted to gaseous products in two consecutive stages: (a) first-stage combustion generating a mixture of gaseous and particulate products of combustion, and (b) second-stage combustion wherein said products of combustion are further treated with supplemental air; wherein said control system regulates, (c) feedback signals from the radiative energy of the first-stage combustion process to provide timely control of the volume of supplemental air to be supplied to the secondary combustion region.
Claim 2
Dependent Claim
92 words
A means for providing a feedback control system of combustion processes in a fluidized-bed incinerator wherein a solid furnace charge is converted to gaseous products in two consecutive stages: (a) first-stage combustion generating a mixture of gaseous and particulate products of combustion, and (b) second-stage combustion wherein said products of combustion are further treated with supplemental air; wherein said control system regulates, (c) feedback signals from the radiative energy of the first-stage combustion process to provide timely control of the volume of supplemental air to be supplied to the secondary combustion region.
Claim 3
Dependent Claim
52 words
A means for controlling the combustion processes of a fluidized-bed incinerator as in claim 1 wherein said means for determining the radiative energy output is a radiation pyrometer, said pyrometer suitably located within the first-stage combustion region to provide appropriate feedback control of the supply of air to said secondary combustion region.
Claim 4
Dependent Claim
93 words
A means for providing a feedback control system of combustion processes taking place in a fluidized-bed incinerator wherein the solid furnace charge is converted to gaseous products in two consecutive stages: (a) first-stage combustion generating a mixture of gaseous and particulate products of combustion, and (b) second-stage combustion wherein said products of combustion are further treated with supplemental air, wherein said control system regulates, (c) feed-back signals from pressure variations in the first-stage combustion process, to provide timely control of the volume of supplemental air to be supplied to the secondary combustion region.
Claim 5
Dependent Claim
93 words
A means for providing a feedback control system of combustion processes taking place in a fluidized-bed incinerator wherein the solid furnace charge is converted to gaseous products in two consecutive stages: (a) first-stage combustion generating a mixture of gaseous and particulate products of combustion, and (b) second-stage combustion wherein said products of combustion are further treated with supplemental air, wherein said control system regulates, (c) feed-back signals from pressure variations in the first-stage combustion process, to provide timely control of the volume of supplemental air to be supplied to the secondary combustion region.
Claim 6
Dependent Claim
49 words
A means for controlling the combustion processes of a fluidized-bed incinerator as in claim 3, wherein said means for determining the furnace pressure is a pressure sensor suitably located within the first-stage combustion region to provide appropriate feedback control of the supply of air to said secondary combustion region.
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) | 1994-06-03 | 1994-12-03 | 1995-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-03 | 1998-12-03 | 1999-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-03 | 2002-12-03 | 2003-06-04 | $7700.00 | Window Closed / Lapsed |