US3820510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for treatment of gases
Assignee: Institut de Recherches de la Siderurgie Francaise IRSID
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Filing: 1972-12-26
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Granted: 1974-06-28
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Expires: 1992-12-26
Abstract
Abstract A method and apparatus for treatment of gases from an oxygen steel plant in which the gases derived from the refining plant are collected without combustion, and are then burned in the presence of a corresponding stoichiometric amount of gas from auxiliary pollution sources. The resultant burned gases are cooled with other gases from polluting sources, part of the recovered heat being reused, and the cooled gases are then subjected to a dust removal treatment and discharged.
Inventors
- 👤 P Vayssiere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:11
CPC Classifications
F; F23; F23G; F23G7/00; F23G7/06; B; B01; B01D; B01D50/00; C; C21; C21C; C21C5/00; C21C5/28; C21C5/38; F23J; F23J15/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
126 words
A method for treating and purifying the streams of polluted gas from an oxygen steel plant, comprising collecting the main stream of gas emitted by the refining plant without combustion, simultaneously collecting other streams of gas produced by auxiliary pollution sources in the steel plant, burning said main stream of gas in the presence of the corresponding stochiometric amount of gas originating from said auxiliary pollution sources, transferring part of the sensible heat from the burned gases to a medium needing heating, completing the cooling of the said burned gases by directly contacting them with the residue of the gases originating from said auxiliary sources, subjecting said residue and said cooled gases to a dust-removal treatment and then discharging the resultant cooled gases into the atmosphere.
Claim 2
Independent Claim
126 words
A method for treating and purifying the streams of polluted gas from an oxygen steel plant, comprising collecting the main stream of gas emitted by the refining plant without combustion, simultaneously collecting other streams of gas produced by auxiliary pollution sources in the steel plant, burning said main stream of gas in the presence of the corresponding stochiometric amount of gas originating from said auxiliary pollution sources, transferring part of the sensible heat from the burned gases to a medium needing heating, completing the cooling of the said burned gases by directly contacting them with the residue of the gases originating from said auxiliary sources, subjecting said residue and said cooled gases to a dust-removal treatment and then discharging the resultant cooled gases into the atmosphere.
Claim 3
Dependent Claim
32 words
The method of claim 1 further comprising subjecting said mainstream of gas emitted by the refining plant to a wet dust-removal process for removing the larger particles therefrom prior to burning thereof.
Claim 4
Dependent Claim
39 words
The method of claim 1 wherein said collecting of the mainstream of gas without combustion comprises limiting air inputs to the refining plant to a very low value whereby said mainstream of gas is rich in carbon monoxide content.
Claim 5
Dependent Claim
184 words
Apparatus for the treatment and purification of polluted gas from an oxygen steel plant and for transferring part of the sensible heat from the treatment process to a medium requiring heating including means for collecting, without combustion, a main gas stream emitted by said steel plant, and collecting means for collecting secondary gas streams produced by auxiliary pollution sources in said said steel plant; said apparatus comprising a combustion chamber having fuel feeding means comprised of the collecting means for the main gas stream, said collecting means for collecting secondary gas streams having first and second branches, combustion gas feeding means connected to said combustion chamber and comprising said first branch of said secondary gas stream collecting means, means for transferring part of the sensible heat of the gases burned in said combustion chamber to said medium requiring heating, a cooling chamber connected to said second branch and to said combustion chamber for receiving the burned gases emitted from the combustion chamber, a dust-remover connected to receive cooled gases from said cooling chamber, and means for discharging gases from said dust-remover into the atmosphere.
Claim 6
Dependent Claim
184 words
Apparatus for the treatment and purification of polluted gas from an oxygen steel plant and for transferring part of the sensible heat from the treatment process to a medium requiring heating including means for collecting, without combustion, a main gas stream emitted by said steel plant, and collecting means for collecting secondary gas streams produced by auxiliary pollution sources in said said steel plant; said apparatus comprising a combustion chamber having fuel feeding means comprised of the collecting means for the main gas stream, said collecting means for collecting secondary gas streams having first and second branches, combustion gas feeding means connected to said combustion chamber and comprising said first branch of said secondary gas stream collecting means, means for transferring part of the sensible heat of the gases burned in said combustion chamber to said medium requiring heating, a cooling chamber connected to said second branch and to said combustion chamber for receiving the burned gases emitted from the combustion chamber, a dust-remover connected to receive cooled gases from said cooling chamber, and means for discharging gases from said dust-remover into the atmosphere.
Claim 7
Dependent Claim
88 words
An apparatus for the treatment and purification of polluted gas from an oxygen steel plant according to claim 4, wherein the collecting means for collecting secondary gas streams produced by auxiliary pollution sources in said steel plant comprises first and second gas collecting devices, the first collection device being connected to said first branch and the second collection device being connected to said second branch, and wherein the gas from said second branch is used in said cooling chamber to cool the burned gas from said combustion chamber.
Claim 8
Dependent Claim
27 words
The apparatus of claim 5 further comprising particle remover means connected to remove larger particles from the mainstream of gas before application thereof to said combustion chamber.
Claim 9
Dependent Claim
15 words
The apparatus of claim 6 wherein said particle removing means comprises a wet dust-removal device.
Claim 10
Dependent Claim
12 words
The apparatus of claim 5 wherein said dust-remover comprises an electrostatic dust-remover.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |