Patent US4510874A successfully refreshed from Google Patents.
US4510874A
Expired / Lapsed
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Burner and process for the partial combustion of solid fuel
Assignee: Shell USA Inc
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Filing: 1984-03-16
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Granted: 1985-04-16
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Expires: 2004-03-16
Abstract
Abstract A burner for the partial combustion of a finely divided solid fuel in a combustion zone, comprising a central channel for finely divided solid fuel, an annular channel for free-oxygen containing gas, substantially concentrically surrounding the central channel. The annular channel is provided with primary, inclined outlet means for directing high velocity free-oxygen containing gas into the outflowing solid fuel during operation and secondary outlet means around the primary outlet means for conveying shielding low velocity free-oxygen containing gas to the combustion zone. The invention further relates to a process for the partial combustion of a finely divided solid fuel, wherein one or more burners of the above type are applied.
Inventors
- 👤 Hendrikus J. A. Hasenack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:17
CPC Classifications
C; C10; C10J; C10J3/00; C10J3/46; C10J3/48; C10J3/50; C10J3/506; C10J3/72; C10J3/74; C10J2200/00; C10J2200/15; C10J2200/152; C10J2300/00; C10J2300/09; C10J2300/0913; C10J2300/093; C10J2300/0953; C10J2300/0956; C10J2300/0959
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
122 words
A burner for the partial combustion of a finely divided solid fuel with an oxygen containing gas in a combustion zone, said burner comprising: a central channel for supplying the fuel to the combustion zone; an annular channel disposed coaxially with said central channel for supplying an oxygen containing gas; a primary outlet means, said primary outlet means communicating with said annular channel and disposed to direct a high velocity oxygen containing gas flow into the fuel discharged from said central channel; and P1 secondary outlet means, said secondary outlet means communicating with said annular channel and surrounding said primary outlet means, said secondary outlet means being disposed to supply a low velocity oxygen containing shielding gas flow to the combustion zone.
Claim 2
Dependent Claim
122 words
A burner for the partial combustion of a finely divided solid fuel with an oxygen containing gas in a combustion zone, said burner comprising: a central channel for supplying the fuel to the combustion zone; an annular channel disposed coaxially with said central channel for supplying an oxygen containing gas; a primary outlet means, said primary outlet means communicating with said annular channel and disposed to direct a high velocity oxygen containing gas flow into the fuel discharged from said central channel; and P1 secondary outlet means, said secondary outlet means communicating with said annular channel and surrounding said primary outlet means, said secondary outlet means being disposed to supply a low velocity oxygen containing shielding gas flow to the combustion zone.
Claim 3
Dependent Claim
28 words
The burner of claim 1 wherein the secondary outlet means is formed by a porous wall disposed in the end of said burner and surrounding said central channel.
Claim 4
Dependent Claim
14 words
The burner of claim 2 wherein said porous material is a sintered ceramic material.
Claim 5
Dependent Claim
14 words
The burner of claim 2 wherein said porous material is a sintered metal material.
Claim 6
Dependent Claim
25 words
The burner of claim 2 wherein said primary outlet means are formed by a series of tubes disposed in openings formed in said porous wall.
Claim 7
Dependent Claim
32 words
The burner of claim 2 wherein the primary outlet means is an integral part of said porous wall and is formed by increasing the porosity in localized areas of said porous wall.
Claim 8
Dependent Claim
36 words
The burner of claim 1 wherein said secondary outlet means is formed by a second annular channel that surrounds said first named annular channel, said second annular channel increasing in cross-sectional area in the downstream direction.
Claim 9
Dependent Claim
43 words
The burner of claim 1 wherein said primary outlet means is formed to produce a gas flow of 60 to 90 meters per second and said secondary outlet means is formed to produce a gas flow of 5 to 10 meters per second.
Claim 10
Dependent Claim
90 words
A process for the partial combustion of a finely divided solid carbon containing fuel with an oxygen containing gas in a combustion chamber, said process comprising: introducing the fuel into the combustion zone as a central stream; introducing a primary flow of the oxygen containing gas into the combustion zone at a velocity of at least 60 m/sec., and in a direction to intersect said fuel stream; and introducing a secondary flow of the oxygen containing gas into the combustion zone at a velocity of not more than 10 m/sec.
Claim 11
Dependent Claim
90 words
A process for the partial combustion of a finely divided solid carbon containing fuel with an oxygen containing gas in a combustion chamber, said process comprising: introducing the fuel into the combustion zone as a central stream; introducing a primary flow of the oxygen containing gas into the combustion zone at a velocity of at least 60 m/sec., and in a direction to intersect said fuel stream; and introducing a secondary flow of the oxygen containing gas into the combustion zone at a velocity of not more than 10 m/sec.
Claim 12
Dependent Claim
17 words
The process of claim 9 wherein said secondary flow of oxygen containing gas surrounds the primary flow.
Claim 13
Dependent Claim
16 words
The process of claim 9 wherein the velocity of the primary flow is about 90 m/sec.
Claim 14
Dependent Claim
16 words
The process of claim 9 wherein the velocity of the secondary flow is about 5 m/sec.
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) | 1988-04-15 | 1988-10-15 | 1989-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-15 | 1992-10-15 | 1993-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-15 | 1996-10-15 | 1997-04-16 | $7700.00 | Window Closed / Lapsed |