[특허]Furnace and process for controlling the oxidative state of molten materials

Furnace and process for controlling the oxidative state of molten materials 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C03B-005/00
출원번호	US-0814045 (2010-06-11)
등록번호	US-8806897 (2014-08-19)
발명자 / 주소	Watson, Matthew James Habel, Michael Edward Lievre, Kevin Alan He, Xiaoyi
출원인 / 주소	Air Products and Chemicals, Inc.
대리인 / 주소	Boyer, Michael K.
인용정보	피인용 횟수 : 0 인용 특허 : 35

초록 ▼

A method useful with oxy-fuel combustion and in a furnace which contains molten material, wherein either substoichiometric or superstoichiometric combustion and low velocity injection of fuel and primary and secondary oxidant in an oxy-fuel burner are carried out in an orientation which forms either

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1. A method for changing the oxidation state of transition metal ion species in a furnace, wherein (i) the furnace is configured for continuous operation and comprises a charging end, a discharge end, a melting zone adjacent the charging end and a fining zone in fluid contact with the discharge end;(ii) glass forming ingredients are introduced into the melting zone, travel along a path from the melting zone to the fining zone and are withdrawn as molten glass from the fining zone; and(iii) the furnace has a combustion energy requirement in a combustion space over both the melting zone and the fining zone;the method comprising:(A) injecting into the combustion space at a point above the molten glass and downstream of the batch blanket, fuel and primary oxidant in a flat-flame configuration and a substoichiometric ratio not less than about 50 percent of stoichiometric, the primary oxidant being a fluid comprising at least 21 mole percent oxygen, both of the fuel and the primary oxidant being injected into the combustion space at a velocity of about 1000 feet per second or less;(B) combusting the fuel and the primary oxidant within the combustion space to produce heat and combustion reaction products including unburned fuel;(C) injecting secondary oxidant into the combustion space in a flat jet configuration below the injection point of the fuel and the primary oxidant such that the secondary oxidant is injected between the molten glass and the injection point of the fuel and the primary oxidant, the secondary oxidant being a fluid comprising at least about 21 mole percent oxygen, at a velocity of about 2000 standard feet per second or less;(D) establishing an oxygen-rich gas layer proximate the molten glass, the oxygen-rich gas layer having a higher oxygen concentration than the molten glass;(E) causing oxygen transport from the oxygen-rich layer into the molten glass, thereby driving a redox reaction of at least one transition metal ion species in the molten glass to oxidize the transition metal ion species; and(F) combusting secondary oxidant with unburned fuel to provide additional heat and combustion reaction products within the furnace. 2. The method of claim 1 wherein the molar flow ratio of oxygen in the primary and secondary oxidant to fuel is above that required for complete combustion. 3. The method of claim 1 wherein either the primary oxidant or secondary oxidant or both is a fluid comprising at least 50 mole percent oxygen. 4. The method of claim 1, wherein the furnace includes a spring zone at the juncture of two convection cells in the molten glass; andwherein the oxygen-rich layer is established proximate the spring zone. 5. A method for reducing transition metal ion species in molten glass in a furnace wherein (i) the furnace is configured for continuous operation and comprises a charging end, a discharge end, a melting zone adjacent the charging end and a fining zone adjacent the discharge end;(ii) glass forming ingredients are introduced into the melting zone, travel along a path from the melting zone to the fining zone and are withdrawn as molten glass from the fining zone; and(iii) the furnace has a combustion energy requirement in a combustion space over both the melting zone and the fining zone;the method comprising:(A) injecting into the combustion space at a point above the molten glass and downstream of the batch blanket, fuel and primary oxidant in a staged flat-flame configuration and a substoichiometric ratio not exceeding about 70 percent of stoichiometric, the primary oxidant being a fluid comprising at least about 21 mole percent oxygen, both of the fuel and the primary oxidant being injected into the furnace at a velocity of about 1000 feet per second or less;(B) combusting the fuel and the primary oxidant within the furnace to produce heat and combustion reaction products including unburned fuel;(C) injecting secondary oxidant into the combustion space in a flat jet configuration above the injection point of the fuel and the primary oxidant such that the injection point of the fuel and the primary oxidant is between the injection of the secondary oxidant and the molten glass, the secondary oxidant being a fluid comprising at least about 21 mole percent oxygen, at a velocity of about 2000 standard feet per second or less;(D) establishing a fuel-rich gas layer proximate the molten glass, the fuel-rich gas layer having a lower oxygen concentration than the molten glass;(E) causing oxygen transport from the molten glass to the fuel-rich layer, thereby driving a redox reaction of at least one transition metal ion species in the molten glass to reduce the transition metal ion species; and(F) combusting secondary oxidant with unburned fuel to provide additional heat and combustion reaction products within the furnace. 6. The method of claim 5 wherein the molar flow ratio of oxygen in the primary and secondary oxidant to fuel is below that required for complete combustion. 7. The method of claim 5 wherein either the primary oxidant or secondary oxidant or both is a fluid comprising at least 50 mole percent oxygen. 8. The method of claim 5, wherein the furnace includes a spring zone at the juncture of two convection cells in the molten glass; andwherein the fuel-rich layer is established proximate the spring zone.

이 특허에 인용된 특허 (35)

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Kobayashi Hisashi (Putnam Valley NY), Glassmelting method with reduced volatilization of alkali species.
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Heithoff Robert B. (LaVale MD), Highly transparent, edge colored glass.
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Adams,Harry P.; Baker,David J.; Jian,Christopher Q.; Toth,William W., Low heat capacity gas oxy fired burner.
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Slavejkov Aleksandar G. (Allentown PA) Gosling Thomas M. (Bethlehem PA) Knorr ; Jr. Robert E. (Allentown PA), Low-NOx staged combustion device for controlled radiative heating in high temperature furnaces.
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Knavish Leonard A. (Plum Boro PA) Harrell William C. (Sarver PA), Melting glass with oxidation control and lowered emissions.
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Hoke, Jr., Bryan Clair; Slavejkov, Aleksandar Georgi; D'Agostini, Mark Daniel; Lievre, Kevin Alan; Pietrantonio, Joseph Michael, Method and apparatus for backing-up oxy-fuel combustion with air-fuel combustion.
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Duchateau Eric ; Philippe Louis ; Jouvaud Dominique,FRX ; Plessier Robert,FRX ; Pivard Claude,FRX ; Lepoutre Etienne,FRX ; Duboudin Jean-Thierry,FRX, Method and apparatus for heating the change of a glass furnace.
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Slavejkov Aleksandar G. (Allentown PA) Gosling Thomas M. (Bethlehem PA) Knorr ; Jr. Robert E. (Allentown PA), Method and device for low-NOx high efficiency heating in high temperature furnaces.
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Krumwiede John F. (Indiana Township ; Allegheny County PA) Harrell William C. (Buffalo Township ; Butler County PA) Hilliard William G. (Lower Burrell PA) Harris James E. (Wichita Falls TX), Method for controlling currents in glass melter.
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Kobayashi, Hisashi; Snyder, William Joseph; Wu, Kuang Tsai, Method for controlling glass furnace atmosphere.
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Yap Loo T. (Princeton NJ), Method for gas lancing.
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Leconte, Jean-Gerard, Method for glass preparation.
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Kobayashi Hisashi (Putnam Valley NY) Ding Maynard G. (Yorktown Heights NY) Francis ; Jr. Arthur W. (Monroe NY), Method for processing niter-containing glassmaking materials.
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Neil George Simpson ; Greg Floyd Prusia ; Stephen McDonald Carney ; Thomas G. Clayton ; Andrew Peter Richardson ; John R. LeBlanc, Method of boosting a glass melting furnace using a roof mounted oxygen-fuel burner.
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Simpson, Neil George; Prusia, Greg Floyd; Carney, Stephen McDonald; Clayton, Thomas G.; Richardson, Andrew Peter; LeBlanc, John R., Method of boosting a glass melting furnace using a roof mounted oxygen-fuel burner.
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LeBlanc John R. (Perrysburg OH) Dankert Thomas K. (Sylvania OH) Tuson Geoffrey B. (Yorktown Heights NY), Method of heating a charge, including injecting secondary oxidant into the output port.
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Shelestak, Larry J.; Shewenninger, Ronald L., Method of reducing redox ratio of molten glass and the glass made thereby.
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Borders, Harley A.; Joshi, Mahendra L.; Streicher, Eric; Legiret, Thierry, Oxygen-fuel burner with adjustable flame characteristics.
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Lauwers Eddy J. (Kalmthout BEX), Process for melting glass.
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Simpson, Neil George; LeBlanc, John R.; Clayton, Thomas G.; Prusia, Greg Floyd, Process of installing roof mounted oxygen-fuel burners in a glass melting furnace.
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Lauwers Eddy J. (Kalmthout BEX), Roof-mounted auxiliary oxygen-fired burner in glass melting furnace.
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LeBlanc John R. ; Khalil Alchalabi Rifat M. ; Baker David J. ; Adams Harry P. ; Hayward James K., Roof-mounted oxygen-fuel burner for a glass melting furnace and process of using the oxygen-fuel burner.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Furnace and process for controlling the oxidative state of molten materials 원문보기

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Furnace and process for controlling the oxidative state of molten materials 원문보기

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