US4611543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Restrictor application for in line gas entrained solids redistribution
Assignee: Combustion Engineering Inc
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Filing: 1981-12-17
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Granted: 1986-09-16
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Expires: 2001-12-17
Abstract
Abstract The invention comprises a burner (10), a first fuel pipe (18) for conveying a mixture of air and pulverized coal to the burner (10), a second fuel pipe (32) for conveying the mixture to the first pipe (18), an elbow (26) joining the first pipe (18) to the second pipe (32), said elbow (26) having an inner radius and an outer radius (27), the improvement comprising a restriction (30) in the second pipe (32), being located such that it forces the coal particles towards the outer radius (27) of the elbow (26), thereby reducing impact wear on the outer radius wall (27) of the elbow (26).
Inventors
- 👤 Robert J. Collette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:04
CPC Classifications
F; F23; F23D; F23D1/00; F15; F15D; F15D1/00; F15D1/02; F15D1/04; F23K; F23K3/00; F23K3/02; F23D2201/00; F23D2201/10; F23D2201/101
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
141 words
In combination a burner, a first substantially horizontal fuel pipe for conveying a mixture of air and pulverized coal to the burner, a second substantially vertical fuel pipe for conveying the mixture to the first pipe, an elbow joining the first pipe to the second pipe, said elbow having an inner radius and an outer radius, the improvement comprising a restriction in the second pipe, being located such that it forces the coal particles towards the outer radius of the elbow, thereby reducing impact wear on the outer radius wall of the elbow, and a substantially horizontal plate means separating the first pipe along its longitudinal axis, so as to form a first upper passage, and a second lower passage, so that a high density stream flows through the upper passage, and a low density stream flows through the lower passage.
Claim 2
Dependent Claim
141 words
In combination a burner, a first substantially horizontal fuel pipe for conveying a mixture of air and pulverized coal to the burner, a second substantially vertical fuel pipe for conveying the mixture to the first pipe, an elbow joining the first pipe to the second pipe, said elbow having an inner radius and an outer radius, the improvement comprising a restriction in the second pipe, being located such that it forces the coal particles towards the outer radius of the elbow, thereby reducing impact wear on the outer radius wall of the elbow, and a substantially horizontal plate means separating the first pipe along its longitudinal axis, so as to form a first upper passage, and a second lower passage, so that a high density stream flows through the upper passage, and a low density stream flows through the lower passage.
Claim 3
Dependent Claim
40 words
The combination set forth in claim 1, wherein the burner has two outlet nozzles, one being substantially in alignment with the outer radius of the elbow, and the other being substantially in alignment with the inner radius of the elbow.
Claim 4
Dependent Claim
36 words
The combination set forth in claim 2, wherein the restriction has a smooth leading up to a zenith, and a smooth decline leading away from said zenith, so as to reduce pressure drop and turbulent flow.
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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) | 1989-09-15 | 1990-03-17 | 1990-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-15 | 1994-03-17 | 1994-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-15 | 1998-03-17 | 1998-09-16 | $7700.00 | Window Closed / Lapsed |