US5345883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reactivation of sorbent in a fluid bed boiler
Assignee: GE Vernova GmbH
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Filing: 1992-12-31
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Granted: 1994-09-13
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Expires: 2012-12-31
Abstract
Abstract A circulating fluidized bed combustion process which uses a sorbent to react with sulfur oxides employs a process for fracturing the sorbent particles to expose unreacted sorbent in the core of the particles to increase the sorbent utilization. The particles within the circulating bed are fractured by injecting water either as a liquid or as steam.
Inventors
- 👤 Paul J. Panos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:17
CPC Classifications
F; F23; F23J; F23J7/00; F23C; F23C10/00; F23C10/02; F23C10/04; F23C10/08; F23C10/10; F23L; F23L7/00; F23L7/002; F23C2206/00; F23C2206/10; F23C2206/103; Y; Y10; Y10S; Y10S502/00; Y10S502/514
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
122 words
In a circulating fluidized bed combustion process for burning a sulfur-containing fuel in a circulating bed of fluidized sorbent particles in a combustor to generate flue gas and sulfur dioxides, separating the generated flue gas from the circulating particles and returning the separated particles to the combustor wherein the sulfur oxides react with sorbent material on the surface of said sorbent particles and wherein unreacted sorbent material remains inside said particles, the improvement comprising injecting a jet of fracturing medium of liquid water or steam at a sufficiently high pressure and direcrted so as to impinge upon said sorbent particles containing unreated sorbent material inside whereby said sorbent particles are mechanically fractured to expose said unreacted sorbent material to said sulfur oxides.
Claim 2
Dependent Claim
122 words
In a circulating fluidized bed combustion process for burning a sulfur-containing fuel in a circulating bed of fluidized sorbent particles in a combustor to generate flue gas and sulfur dioxides, separating the generated flue gas from the circulating particles and returning the separated particles to the combustor wherein the sulfur oxides react with sorbent material on the surface of said sorbent particles and wherein unreacted sorbent material remains inside said particles, the improvement comprising injecting a jet of fracturing medium of liquid water or steam at a sufficiently high pressure and direcrted so as to impinge upon said sorbent particles containing unreated sorbent material inside whereby said sorbent particles are mechanically fractured to expose said unreacted sorbent material to said sulfur oxides.
Claim 3
Dependent Claim
33 words
In a process as recited in claim 1 wherein said fracturing medium is at a temperature lower than the temperature of said sorbent particles at the point of injection thereby causing thermal shock.
Claim 4
Dependent Claim
36 words
In a process as recite in claim 1 wherein said fracturing medium is directed such that bed particles containing sorbent are caused to be mechanically broken apart by striking a target surface or other bed particles.
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) | 1997-09-12 | 1998-03-14 | 1998-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-09-12 | 2002-03-14 | 2002-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-09-12 | 2006-03-14 | 2006-09-13 | $7700.00 | Window Closed / Lapsed |