Patent US4331638A successfully refreshed from Google Patents.
US4331638A
Expired / Lapsed
US
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Method of dry scrubbing reaction products resulting from flame burning
Assignee: Hitachi Zosen Inova Steinmueller GmbH
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Filing: 1980-08-07
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Granted: 1982-05-25
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Expires: 2000-08-07
Abstract
Abstract A method of scrubbing reaction products resulting from flame burning of fuels containing impurities such as sulfur compounds, chlorine compounds, and fluorine compounds. The scrubbing is accomplished by the addition to the fire chamber of additives which bind the impurities. The additives are supplied to the burner flame by way of a gaseous and/or liquid carrier medium flow, accompanied by the formation of a veil surrounding the burner flame.
Inventors
- 👤 Sigfrid Michelfelder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:08
CPC Classifications
C; C10; C10L; C10L10/00; C10L10/02; F; F23; F23J; F23J7/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
193 words
A method of generating a flame while scrubbing undesirable reaction products including sulfur, chlorine and fluorine compounds from the flame, said method including the simultaneous steps of: ejecting a first stream of air to form an air core; ejecting a stream of fuel around the core of air and directly adjacent thereto; ejecting a second stream of air around the stream of fuel and directly adjacent thereto; ejecting a carrier medium outboard of and in spaced relation to the second stream of air and, said carrier medium being ejected toward the second stream of air and downstream from the ejection of the core air, fuel stream and second air stream; igniting the fuel to form a back flow region within the air core; a primary combustion region around the back flow region and extending downstream therefrom, and a post reaction region around a portion of the primary combustion region and extending downstream of the primary combustion region, and entraining combustion product, binding additives in the carrier medium, which additives remaining in the post reaction region to bind with the undesirable reaction products and thereby scrub the flame at the source of the flame.
Claim 2
Independent Claim
193 words
A method of generating a flame while scrubbing undesirable reaction products including sulfur, chlorine and fluorine compounds from the flame, said method including the simultaneous steps of: ejecting a first stream of air to form an air core; ejecting a stream of fuel around the core of air and directly adjacent thereto; ejecting a second stream of air around the stream of fuel and directly adjacent thereto; ejecting a carrier medium outboard of and in spaced relation to the second stream of air and, said carrier medium being ejected toward the second stream of air and downstream from the ejection of the core air, fuel stream and second air stream; igniting the fuel to form a back flow region within the air core; a primary combustion region around the back flow region and extending downstream therefrom, and a post reaction region around a portion of the primary combustion region and extending downstream of the primary combustion region, and entraining combustion product, binding additives in the carrier medium, which additives remaining in the post reaction region to bind with the undesirable reaction products and thereby scrub the flame at the source of the flame.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein the carrier medium includes air for combustion in the flame.
Claim 4
Dependent Claim
13 words
The method of claim 2 wherein the carrier medium further includes flue gas.
Claim 5
Dependent Claim
12 words
The method of claim 1 wherein the carrier medium is flue gas.
Claim 6
Dependent Claim
13 words
The method of claim 1 wherein the carrier medium includes an aqueous suspension.
Claim 7
Dependent Claim
21 words
The method of claim 1 wherein the additives are selected from the group consisting of reactive metal oxides and metal hydroxides.
Claim 8
Dependent Claim
11 words
The method of claim 1 wherein the additive is pulverized material.
Claim 9
Dependent Claim
22 words
The method of claim 7 wherein the pulverized material is selected from the group consisting of calcium carbonate, magnesium carbonate and dolomite.
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) | 1985-05-24 | 1985-11-23 | 1986-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-24 | 1989-11-23 | 1990-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-24 | 1993-11-23 | 1994-05-25 | $7700.00 | Window Closed / Lapsed |