[특허]Oxygen enhanced switching to combustion of lower rank fuels

Oxygen enhanced switching to combustion of lower rank fuels 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F23M-003/04 F23M-003/02 F23J-011/00
출원번호	US-0194574 (2002-07-11)
우선권정보	WO-PCT/US01/48713 (2001-12-20)
발명자 / 주소	Kobayashi, Hisashi Bool, III, Lawrence E. Wu, Kuang Tsai
출원인 / 주소	Praxair Technology, Inc.
대리인 / 주소	Black, Donald T.
인용정보	피인용 횟수 : 13 인용 특허 : 65

초록 ▼

A furnace that combusts fuel, such as coal, of a given minimum energy content to obtain a stated minimum amount of energy per unit of time is enabled to combust fuel having a lower energy content, while still obtaining at least the stated minimum energy generation rate, by replacing a small amount of the combustion air fed to the furnace by oxygen. The replacement of oxygen for combustion air also provides reduction in the generation of NOx.

대표청구항 ▼

1. A method for modifying operation of a furnace, comprising to a furnace that comprises a combustion chamber, burner means for combusting hydrocarbonaceous fuel containing bound nitrogen and having a given minimum calorific value in said combustion chamber to generate heat of combustion and gaseous combustion products, feed means for feeding said fuel and combustion air to said burner means, flue means for enabling said combustion products to leave said combustion chamber, and heating means for using said heat of combustion to produce steam, wherein said furnace is being operated to combust a first fuel containing bound nitrogen and having said minimum calorific value to produce steam at a defined minimum rate of energy content per unit of time, providing replacement fuel by replacing some or all of said first fuel with a second hydrocarbonaceous fuel whose calorific value is below that of the first fuel, at a replacement ratio such that the feed rate of said second fuel to said furnace divided by the feed rate of said first fuel to said furnace in units of energy per unit time is between 1.0 to 1.3, and feeding said replacement fuel to said burner means, feeding gaseous oxygen into said replacement fuel as the replacement fuel emerges from said burner into said combustion chamber or by adding it to air that is fed through said burner, in an amount which is less than 25% of the stoichiometric amount required for complete combustion of said replacement fuel while reducing the amount of air fed through said burner by an amount containing sufficient oxygen that the overall stoichiometric ratio in said furnace varies by not more than 10% compared to the stoichiometric ratio without said addition of oxygen, and combusting said replacement fuel with said combustion air and said oxygen. 2. The method of claim 1 wherein the calorific values of said first fuel and said second fuel are related such that the available heat above 2000 F. generated by combusting said first fuel with air at a given stoichiometric ratio and temperature is 103% or more of the available heat above 2000 F. generated by combusting said second fuel with air at said given stoichiometric ratio and temperature. 3. The method of claim 1 wherein said oxygen is fed to said burner at a sufficient rate that said furnace produces steam at a rate of energy content per unit of time at least equal to said defined minimum rate. 4. The method of claim 1 wherein said first fuel is bituminous coal and said second fuel optionally comprises bituminous coal and further comprises coal selected from the group consisting of subbituminous coal, lignite and mixtures thereof. 5. The method of claim 1 wherein said combustion is staged with over fire air and the primary combustion zone stoichiometric ratio is between 0.6 and 1.0. 6. A method according to claim 1 wherein a stream of fuel is fed through said burner and oxygen is fed into said fuel by injecting it through a hollow lance, positioned in said stream, into the fuel as the fuel emerges from the burner. 7. A method according to claim 1 wherein a stream of fuel is fed through an annular fuel passage of said burner, and oxygen is fed into said fuel by injecting it through an annular passage surrounding or surrounded by said annular fuel passage.

이 특허에 인용된 특허 (65)

Marion John L. (Simsbury CT), Advanced overfire air system for NOx control.
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Yap Loo T. (Princeton NJ), Air-oxy-fuel burner method and apparatus.
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Laurenceau, Serge; Moufflet, Luc; Genies, Bernerd, Burner for pulverized coal.
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Dykema Owen W. (23429 Welby Way West Hills CA 91307), Coal combustion process for SOx and NOx control.
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Hisashi Kobayashi, Combustion in a porous wall furnace.
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Ho Min-Da (Somers NY), Combustion method for simultaneous control of nitrogen oxides and products of incomplete combustion.
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Greskovich Eugene J. (Allentown PA), Combustion of coal/water slurries.
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Greskovich Eugene J. (Allentown PA) Zanchuk Walter A. (Walnutport PA), Combustion of high ash coals.
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Dykema Owen W. (Canoga Park CA), Combustion process.
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Ho Min-Da (Somers NY), Combustion process having improved temperature distribution.
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Beer Janos M. (Winchester MA) Marotta Alessandro (Milan MA ITX) Toqan Majed A. (Wellesley MA), Combustion system for reduction of nitrogen oxides.
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Rabovitser Iosif K. ; Knight Richard A. ; Abbasi Hamid A., Compact low-nox high-efficiency heating apparatus.
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Ding Maynard Guotsuen, Dual oxidant combustion system.
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Hoke, Jr., Bryan Clair; Lievre, Kevin Alan; Slavejkov, Aleksandar Georgi; Inskip, Julian Leonard; Marchiando, Robert Dean; Eng, Robert Michael, Glass melting process and furnace therefor with oxy-fuel combustion over melting zone and air-fuel combustion over fining zone.
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Kobayashi Hisashi (Putnam Valley NY), Glassmelting method with reduced nox generation.
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Khinkis Mark J. ; Abbasi Hamid A. ; Grosman Roman E., High-heat transfer, low-nox oxygen-fuel combustion system.
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Tuson Geoffrey B. (Yorktown Heights NY) Kobayashi Hisashi (Putnam Valley NY), Hybrid oxidant combustion method.
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Ryan ; III Harry Monroe ; Francis ; Jr. Arthur Wellington ; Riley Michael Francis ; Kobayashi Hisashi, Low NO.sub.x combustion process.
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Ho Min-Da (Somers NY), Low NOx high efficiency combustion process.
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Rabovitser Iosif K. ; Knight Richard ; Khinkis Mark J. ; Abbasi Hamid A. ; Wohadlo Stan, Low NOx pulverized solid fuel combustion process and apparatus.
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Ashworth Robert ; Murrell Frederick J. ; Zawadzki Edward A., Low nitrogen oxides emissions from carbonaceous fuel combustion using three stages of oxidation.
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Ashworth Robert A., Low nitrogen oxides emissions from carbonaceous fuel combustion using three stages of oxidation.
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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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Anderson John E. (Somers NY) Farrenkopf Dennis R. (Bethel CT) Francis ; Jr. Arthur W. (Monroe NY) Slader Steven L. (New York NY) Snyder William J. (Ossining NY), Luminous combustion system.
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Hansel James G. (Emmaus PA), Means for providing oxygen enrichment for slurry and liquid fuel burners.
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Schirmer Robert M. (Bartlesville OK) Alquist Henry E. (Savannah GA), Method and apparatus for burning high nitrogen-high sulfur fuels.
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Gitman Grigory M. (Duluth GA), Method and apparatus for generating highly luminous flame.
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Baukal ; Jr. Charles E. (Harleysville PA) Slavejkov Aleksandar G. (Allentown PA) Monroig Louis W. (Myerstown PA), Method and apparatus for reducing NOX production during air-oxygen-fuel combustion.
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Baukal ; Jr. Charles Edward ; Gershtein Vladimir Yliy ; Heffron James Francis ; Best Robert C. ; Eleazer ; III Prince Boyd, Method and apparatus for reducing NOx production during air-oxygen-fuel combustion.
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Leisse Alfons,DEX ; Streffing Michael,DEX, Method and apparatus for the reduction of nox generation during coal dust combustion.
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Joshi Mahendra L. ; Borders Harley A. ; Charon Olivier, Method and system for increasing the efficiency and productivity of a high temperature furnace.
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Breen Bernard P. ; Glickert Roger W. ; Gabrielson James E. ; Bionda John P. ; Hallo Anthony ; Gretz Gerard F., Method for NO.sub.x reduction by upper furnace injection of solutions of fixed nitrogen in water.
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Bernard P. Breen ; Jeffrey J. Sweterlitsch ; James E. Gabrielson, Method for NOx reduction by upper furnace injection of biofuel water slurry.
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Kobayashi Hisashi (Putnam Valley NY) Silver Louis S. (Montreal CAX), Method for combusting fuel containing bound nitrogen.
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Ho Min-Da (Somers NY), Method for combusting wet waste.
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Hisashi Kobayashi, Method for deeply staged combustion.
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Marin Ovidiu ; Charon Oliver, Method for operating a boiler using oxygen-enriched oxidants.
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Ovidiu Marin ; Oliver Charon, Method for operating a boiler using oxygen-enriched oxidants.
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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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Bazarian Edward R. (Allentown PA) Heffron James F. (Orwigsburg PA) Baukal ; Jr. Charles E. (Harleysville PA), Method for reducing NOx production during air-fuel combustion processes.
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Takahashi Yasuro (Nagasaki JPX) Sakai Masayasu (Nagasaki JPX), Method of burning fuel with lowered nitrogen-oxides emission.
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Joshi Mahendra L. ; Borders Harley A. ; Charon Olivier, Method of retrofitting a furnace to provide oxygen enrichment.
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Blair David W. (Princeton NJ) Bartok William (Westfield NJ) Longwell John P. (Cambridge MA) Sarofim Adel F. (Belmont MA), Multi-stage process for combusting fuels containing fixed-nitrogen chemical species.
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Bartok William (Westfield NJ) Song Yih H. (Berkeley Heights NJ) Siminski Vince J. (Rockaway NJ) Longwell John P. (Cambridge MA), Multi-stage process for combusting fuels containing fixed-nitrogen species.
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Ho Min-Da (Somers NY) Liszewski Paul J. (Yonkers NY), Multiple oxidant jet combustion method and apparatus.
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Kobayashi Hisashi ; Bool ; III Lawrence E. ; Riley Michael Francis, NOx reduction using coal based reburning.
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Joshi Mahendra L. ; Jurcik ; Jr. Benjamin J.,FRX ; Simon Jean-Francois,BEX, Oxidizing oxygen-fuel burner firing for reducing NOx emissions from high temperature furnaces.
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Anderson, John E., Oxygen aspirator burner for firing a furnace.
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Khinkis Mark J. (Morton Grove IL), Oxygen enriched combustion.
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Khinkis Mark J. (Morton Grove IL) Abbasi Hamid A. (Darien IL), Oxygen-enriched combustion method.
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Johnson Gregory L. (Houston TX), Premixed/high-velocity fuel jet low no burner.
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Kobayashi Hisashi (Tarrytown NY) Anderson John E. (Katonah NY), Process for firing a furnace.
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Chamberland Ray Paul, Recessed furnace lance purge gas system.
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Ho Min-Da (Somers NY), Recirculation and plug flow combustion method.
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Delano Mark A. (Briarcliff Manor NY), Reduced Nox combustion method.
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Baukal ; Jr. Charles E. (Harleysville PA) Dalton Augustine I. (Macungie PA), Reduction of nitrogen oxides in oxygen-enriched combustion processes.
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Kobayashi Hisashi (Putnam Valley NY), Segregated zoning combustion.
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Greskovich Eugene J. (Allentown PA) Zanchuk Walter A. (Palmerton PA), Slag reduction in coal-fired furnaces using oxygen enrichment.
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Kobayashi William T. (San Paulo-SP BRX) Francis ; Jr. Arthur W. (Monroe NY) Kobayashi Hisashi (Putnam Valley NY), Staged combustion for reducing nitrogen oxides.
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Henderson James K. (New Orleans LA), Substoichiometric fuel firing for minimum NOx emissions.
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Kobayashi Hisashi (Putnam Valley NY), Super off-stoichiometric combustion method.
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Khinkis Mark J. (Morton Grove IL), Ultra-low pollutant emission combustion method and apparatus.
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Christian J. Feldermann GB, Variable stoichiometric combustion.
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Panesar, Raghbir S.; Hume, Scott A.; Cameron, Stuart D., Combustion apparatus.
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Kobayashi, Hisashi; Bool, III, Lawrence E., Combustion with reduced carbon in the ash.
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Bioul, Francois; Douxchamps, Olivier, Glass melting furnace.
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Eiteneer, Boris Nikolaevich; Seeker, William Randall; Payne, Roy, Method and apparatus for operating a fuel flexible furnace to reduce pollutants in emissions.
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Zamansky, Vladimir; Lissianski, Vitali; Eiteneer, Boris Nikolaevich; Wei, Wei; Jupudi, Ravichandra Srinivasa; Subramanian, Ramanathan, Method of operating a gasifier.
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Zamansky, Vladimir; Lissianski, Vitali Victor; Eiteneer, Boris Nikolaevich; Wei, Wei; Jupudi, Ravichandra Srinivasa; Subramanian, Ramanathan, Method of reducing oxygen requirement of a coal gasifier.
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Zamansky, Vladimir; Lissianski, Vitali; Eiteneer, Boris Nikolaevich; Wei, Wei; Jupudi, Ravichandra Srinivasa; Subramanian, Ramanathan, Method of retrofitting a coal gasifier.
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Laux, Stefan E. F., Oxygen to expand burner combustion capability.
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Laux, Stefan E. F., Oxygen to expand burner combustion capability.
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Laux, Stefan E. F., Oxygen to expand burner combustion capability.
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Laux, Stefan E. F., Oxygen to expand burner combustion capability.
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Amirat, Mohand; Behen, Johan; Constantin, Gabriel; Douxchamps, Olivier; Grand, Benoit; Tsiava, Remi; Wagemans, Fabrice, Power supply for hot oxygen burner.
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Leroux, Bertrand; Tsiava, Remi Pierre, Staged combustion method with optimized injection of primary oxidant.
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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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연합인증

Oxygen enhanced switching to combustion of lower rank fuels 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

이 특허에 인용된 특허 (65)

이 특허를 인용한 특허 (13)

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Oxygen enhanced switching to combustion of lower rank fuels 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

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이 특허에 인용된 특허 (65)

이 특허를 인용한 특허 (13)

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