US3947238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for dispersing powered material in a combustion chamber
Assignee: Taiheiyo Cement Corp
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Filing: 1974-10-25
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Granted: 1976-03-30
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Expires: 1994-10-25
Abstract
Abstract A method and apparatus for thoroughly dispersing powdered material in a combustion chamber of a furnace in combination with a suspension preheater and a kiln to improve combustion efficiency. The material is introduced as a free falling stream in the upper zone of the combustion chamber and is contacted in the upper zone with recycled gases from a cooler and a second gas introduced at a higher velocity than said recycled gases, whereby the powdered material is thoroughly dispersed throughout said combustion chamber and heat exchange between the material and gases is enhanced.
Inventors
- 👤 Yoshiharu Fukuda
- 👤 Yoshihiko Ueda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:40
CPC Classifications
F; F27; F27B; F27B7/00; F27B7/20; F27B7/2016; F27B7/2025; F27B7/2033
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
157 words
A method of thoroughly dispersing powdered material into a combustion chamber of a furnace, wherein said material is introduced into the top of said combustion chamber from a suspension preheater including air exhaust means, and wherein said material is combusted in said combustion chamber and is passed to a calcining chamber and cooling zone, and wherein gases from said cooling zone are recycled to said combustion chamber, comprising introducing said recycled gases to the upper zone of said combustion chamber, introducing a second gas into said upper zone at a velocity greater than said entering recycled gases, introducing said material as a free falling stream into said upper zone of said combustion chamber and contacting said free falling stream of material with said recycled gases and second gas prior to combustion of said material in said combustion chamber, to thereby give said gases and material a swirling motion and to thoroughly disperse said material in said chamber.
Claim 2
Independent Claim
157 words
A method of thoroughly dispersing powdered material into a combustion chamber of a furnace, wherein said material is introduced into the top of said combustion chamber from a suspension preheater including air exhaust means, and wherein said material is combusted in said combustion chamber and is passed to a calcining chamber and cooling zone, and wherein gases from said cooling zone are recycled to said combustion chamber, comprising introducing said recycled gases to the upper zone of said combustion chamber, introducing a second gas into said upper zone at a velocity greater than said entering recycled gases, introducing said material as a free falling stream into said upper zone of said combustion chamber and contacting said free falling stream of material with said recycled gases and second gas prior to combustion of said material in said combustion chamber, to thereby give said gases and material a swirling motion and to thoroughly disperse said material in said chamber.
Claim 3
Dependent Claim
16 words
The method of claim 1, wherein said second gas comprises a portion of said recycled gases.
Claim 4
Dependent Claim
16 words
The method of claim 1, wherein said second gas is introduced tangentially into said upper zone.
Claim 5
Dependent Claim
28 words
The method of claim 1, wherein said second gas introduced is in an amount 5% to 10% by volume greater than that required for combustion of said material.
Claim 6
Dependent Claim
12 words
The method of claim 1, wherein said second gas comprises atmospheric air.
Claim 7
Independent Claim
162 words
An apparatus for thoroughly dispersing powdered material into a combustion chamber of a furnace wherein combustion thereof takes place, comprising, in combination, suspension preheater means, furnace means, kiln means, and cooling means, for introducing said material from said preheater means as a falling stream into the upper part of said combustion chamber, means for recycling gases from said cooling means into the upper part of said combustion chamber, means including blower means for introducing a second gas into the upper part of said combustion chamber at a velocity greater than the velocity of said recycled gases, said gas recycling means and second gas introducing means disposed in said upper part of said combustion chamber adjacent said material introducing means, whereby said falling stream of material contacts said recycled gases and second gas prior to combustion of said material in said combustion chamber, to thereby give said gases and said material a swirling motion and to thoroughly disperse said material in said chamber.
Claim 8
Independent Claim
162 words
An apparatus for thoroughly dispersing powdered material into a combustion chamber of a furnace wherein combustion thereof takes place, comprising, in combination, suspension preheater means, furnace means, kiln means, and cooling means, for introducing said material from said preheater means as a falling stream into the upper part of said combustion chamber, means for recycling gases from said cooling means into the upper part of said combustion chamber, means including blower means for introducing a second gas into the upper part of said combustion chamber at a velocity greater than the velocity of said recycled gases, said gas recycling means and second gas introducing means disposed in said upper part of said combustion chamber adjacent said material introducing means, whereby said falling stream of material contacts said recycled gases and second gas prior to combustion of said material in said combustion chamber, to thereby give said gases and said material a swirling motion and to thoroughly disperse said material in said chamber.
References Cited (Backward Citations)
US1468168A
Cited
US2580235A
Cited
US3146998A
Cited
US3452968A
Cited
US3491991A
Cited
US3752455A
Cited
US3834860A
Cited
US3843314A
Cited
US3869248A
Cited
US3881862A
Cited
US3904353A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-30 | 1979-09-29 | 1980-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-30 | 1983-09-29 | 1984-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-30 | 1987-09-29 | 1988-03-30 | $7700.00 | Window Closed / Lapsed |