US5261337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion control method of refuse incinerator
Assignee: Mitsubishi Heavy Industries Ltd
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Filing: 1992-05-13
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Granted: 1993-11-16
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Expires: 2012-05-13
Abstract
Abstract The present invention aims for the object thereof at preventing unburnt gas and noxious gas components from being generated in a refuse incinerator, and provides a combustion control method by which it is arranged so that a feeder (2) and a stoker (3) are not only controlled so as to keep evaporation (S1) of the boiler at a target value thereby to achieve stabilized combustion extending over a long period of time, but also feed water quantity (S2) and the like from a boiler water pipe section (2) forming a combustion chamber (6) are detected, and the rate of overfire air quantity to main combustion air quantity to a lower part of the stoker is controlled at a constant total gas capacity so that the fluctuation width of the feed water quantity (S2) falls within a set range.
Inventors
- 👤 Norihiko Orita
- 👤 Hidetaka Ono
- 👤 Masaharu Kira
- 👤 Shizuo Yasuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:23
CPC Classifications
F; F23; F23N; F23N1/00; F23N1/02; F23N1/022; F23G; F23G5/00; F23G5/50; F23N5/00; F23N5/003; F23N5/006; F23G2207/00; F23G2207/10; F23G2207/103; F23G2207/20; F23G2207/30; F23G2900/00; F23G2900/55; F23G2900/55008; F23G2900/55009; F23N2233/00; F23N2233/06; F23N2233/08; F23N2237/00; F23N2237/16; F23N2241/00; F23N2241/18; F23N5/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
70 words
A combustion control method of a refuse incinerator, comprising the steps of: detecting at least one of total evaporation (S1) feed water quantity (S2) and evaporation level (S7) at a boiler water pipe panel section forming a combustion chamber of a refuse incinerator; and controlling a ratio of overfire air quantity to main combustion chamber air quantity so that the fluctuation of the detected value falls within a set range.
Claim 2
Dependent Claim
70 words
A combustion control method of a refuse incinerator, comprising the steps of: detecting at least one of total evaporation (S1) feed water quantity (S2) and evaporation level (S7) at a boiler water pipe panel section forming a combustion chamber of a refuse incinerator; and controlling a ratio of overfire air quantity to main combustion chamber air quantity so that the fluctuation of the detected value falls within a set range.
Claim 3
Dependent Claim
95 words
A combustion control method of a refuse incinerator, comprising the steps: detecting total evaporation (S1) at a boiler water pipe panel section forming a combustion chamber of a refuse incinerator and feed water quantity (S2) to said boiler water pipe panel section; and controlling a ratio of overfire air quantity to main combustion air quantity so that the overfire air quantity is increased when said feed water quantity (S2) is large than a set value and the main combustion air quantity is increased when said feed water quantity (S2) is smaller than the set value.
Claim 4
Dependent Claim
95 words
A combustion control method of a refuse incinerator, comprising the steps: detecting total evaporation (S1) at a boiler water pipe panel section forming a combustion chamber of a refuse incinerator and feed water quantity (S2) to said boiler water pipe panel section; and controlling a ratio of overfire air quantity to main combustion air quantity so that the overfire air quantity is increased when said feed water quantity (S2) is large than a set value and the main combustion air quantity is increased when said feed water quantity (S2) is smaller than the set value.
Claim 5
Dependent Claim
86 words
A combustion control method of a refuse incinerator, comprising the steps of: detecting total evaporation (S1) and evaporation level (S7) at a boiler water pipe panel section forming a combustion chamber of a refuse incinerator; and controlling a ratio of overfire air quantity to main combustion air quantity so that the overfire air quantity is reduced when said evaporation level (S7) is higher than a set value and the main combustion air quantity is reduced when said evaporation level (S7) is lower than the set value.
Claim 6
Dependent Claim
86 words
A combustion control method of a refuse incinerator, comprising the steps of: detecting total evaporation (S1) and evaporation level (S7) at a boiler water pipe panel section forming a combustion chamber of a refuse incinerator; and controlling a ratio of overfire air quantity to main combustion air quantity so that the overfire air quantity is reduced when said evaporation level (S7) is higher than a set value and the main combustion air quantity is reduced when said evaporation level (S7) is lower than the set value.
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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) | 1996-11-15 | 1997-05-17 | 1997-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-15 | 2001-05-17 | 2001-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-15 | 2005-05-17 | 2005-11-16 | $7700.00 | Window Closed / Lapsed |