WO2007091011A1 - Carreaux refractaires de bruleur possedant une emissivite optimisee et appareil de combustion associe - Google Patents
Carreaux refractaires de bruleur possedant une emissivite optimisee et appareil de combustion associe Download PDFInfo
- Publication number
- WO2007091011A1 WO2007091011A1 PCT/GB2007/000075 GB2007000075W WO2007091011A1 WO 2007091011 A1 WO2007091011 A1 WO 2007091011A1 GB 2007000075 W GB2007000075 W GB 2007000075W WO 2007091011 A1 WO2007091011 A1 WO 2007091011A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- emissivity
- coating
- combustion apparatus
- burner
- burner tiles
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M5/00—Casings; Linings; Walls
- F23M5/02—Casings; Linings; Walls characterised by the shape of the bricks or blocks used
- F23M5/025—Casings; Linings; Walls characterised by the shape of the bricks or blocks used specially adapted for burner openings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/0003—Linings or walls
- F27D1/0006—Linings or walls formed from bricks or layers with a particular composition or specific characteristics
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
- F27D1/1678—Increasing the durability of linings; Means for protecting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D99/00—Subject matter not provided for in other groups of this subclass
- F27D99/0001—Heating elements or systems
- F27D99/0033—Heating elements or systems using burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M2900/00—Special features of, or arrangements for combustion chambers
- F23M2900/05004—Special materials for walls or lining
Definitions
- the present invention relates generally to combustion apparatus 5 such as process heaters, furnaces, boilers, and other fired heating systems.
- combustion apparatus 5 such as process heaters, furnaces, boilers, and other fired heating systems.
- the present invention relates to combustion apparatus which include refractory burner tiles provided with improved emissivity characteristics.
- burners function to combust burner fuel and air so as to generate the required heat.
- the efficiency of the burner is very important to operators due to fuel costs and the need to reduce nitrogen oxides
- burners designed for combusting fuel with air in a manner resulting in less NO x emissions are commonly referred to as "low NO x " burners and are well known in the art as evidenced by U.S. Patent Nos. 6,905,328, 6,499,990 and 6,394,792, the entire content of each being expressly incorporated hereinto by
- combustion apparatus are improved by providing a high emissivity (high-E) coating onto faces of refractory burner tiles.
- high-E high emissivity
- the combustion apparatus which employ the high-E coated burner tiles of the present invention may 25 achieve longer service life, improved flame stability, easier combustion and a more stable flame pattern under a wide range of operating conditions.
- the performance of a combustion apparatus is improved by providing burner tiles therein which include a coating of a high-emissivity (high-E) material.
- the high-E material has an emissivity of greater than about 0.80, usually between about 0.85 to about 0.98. In some embodiments, the high-E material has an emissivity of about 0.92.
- the coating thickness of the high-E material bn the burner tile can be between about 0.0005 to about 0.025 inch, preferably between about
- the high- E material is ceramic. Burner tiles comprising a coating layer of the high- emissivity material may therefore be incorporated into a combustion apparatus so as to improve its performance.
- FIGURE is a partial cross-sectional elevational schematic view of a combustion apparatus employing the high-E coated burner tiles of the present invention.
- a high-emissivity (high-E) ceramic coating is applied to surfaces of burner tiles associated with a combustion apparatus so as to provide enhanced combustion. More specifically enhanced combustion of the burner fuel is provided according to the present invention by the higher heat energy (flux) from the high-E ceramic coated surfaces of the burner tiles.
- the emissivity (E) of a material is meant to refer to a unitless number measured on a scale between zero (total energy reflection) and 1.0 (a perfect “black body” capable of total energy absorption and re-radiation).
- a relatively high emissivity (high-E) is meant to refer to coating materials having an emissivity of greater than about 0.80, and usually between about 0.85 to about 0.98, and most preferably between about 0.85 to about 0.95.
- FIGURE depicts in schematic fashion a furnace 10 having a burner apparatus 12 operatively attached to the furnace's refractory wall 14.
- Any suitable burner apparatus may be employed, such as the burner described in U.S. Patent No. 5,961 ,312 (the entire content of which is expressly incorporated hereinto by reference.)
- the refractory wall 14 includes a burner tunnel 16 which is defined by burner tiles 18.
- the burner tiles 18 depicted in the accompanying FIGURE define a generally cylindrical burner tunnel 16, but other geometric shapes may be employed as desired.
- a square or rectangular burner tunnel 16 may be defined by the refractory tiles 18.
- the individual burner tiles 18 are constructed of a body of refractory material, e.g., ceramics, conventionally employed for high temperature environments.
- the burner tiles 18 have a coating 20 on the surfaces thereof which is formed from a high-E ceramic material.
- a high-E ceramic coating material may be employed satisfactorily in the practice of the present invention.
- one presently preferred high-E ceramic coating is
- the thickness of the coating 20 on the surfaces of the burner tiles 20 is not critical but will vary in dependence upon the desired resulting thermal flux and/or the particular material forming the coating. Thus, coating thicknesses of from about 0.0005 to about 0.025, usually between about 0.001 inch to about 0.002 inch may be appropriate. Coating densities will typically be greater than about 65%, more specifically 80% or greater, including up to 100%. By “coating density” is meant the amount (wt.%) of the high-E ceramic coating material that is present in the coating 20.
- the high-E coating material may be applied to the burner tiles 18 in any conventional manner.
- the high-E coating material forming the coating 20 may thus be applied to the surfaces of the burner tiles 18 via any pressurized spray system while the burner tiles are being manufactured or while off-line (i.e., is not at its operational temperatures) during refurbishment.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Gas Burners (AREA)
Abstract
Dans le cadre de la présente invention, les performances d'un appareil de combustion sont optimisées par l'intégration d'un carreau de brûleur qui comprend un revêtement de matériau à haute émissivité (haute E). De préférence, le matériau à haute E possède une émissivité supérieure à environ 0,80, en général entre environ 0,85 et environ 0,98. Dans certains modes de réalisation, le matériau à haute E possède une émissivité d'environ 0,92. L'épaisseur de revêtement du matériau à haute E sur le carreau de brûleur peut être entre environ 0,0005 et environ 0,025 pouce, de préférence entre environ 0,001 et environ 0,002 pouce. Dans des modes de réalisation particulièrement préférés, le matériau à haute E est une céramique. Un carreau de brûleur comprenant une couche de revêtement du matériau à haute émissivité peut donc être incorporé dans un appareil de combustion afin d'améliorer ses performances de combustion.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US77148006P | 2006-02-09 | 2006-02-09 | |
US60/771,480 | 2006-02-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007091011A1 true WO2007091011A1 (fr) | 2007-08-16 |
Family
ID=38123952
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB2007/000075 WO2007091011A1 (fr) | 2006-02-09 | 2007-01-12 | Carreaux refractaires de bruleur possedant une emissivite optimisee et appareil de combustion associe |
Country Status (3)
Country | Link |
---|---|
US (1) | US20070207418A1 (fr) |
AR (1) | AR059369A1 (fr) |
WO (1) | WO2007091011A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2007209180B2 (en) * | 2006-01-27 | 2011-11-24 | Fosbel Intellectual Limited | Longevity and performance improvements to flare tips |
US20140212823A1 (en) * | 2013-01-25 | 2014-07-31 | Chevron U.S.A. Inc. | Reduction of NOx Emissions From Fired Heaters With Combustion Air Preheaters |
Citations (6)
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US2791977A (en) * | 1950-08-03 | 1957-05-14 | Bernitz Furnace Appliance Comp | Refractory burner rings for furnace walls |
JPS61256110A (ja) * | 1985-05-04 | 1986-11-13 | Shoei Seisakusho:Kk | ラジアントカツプバ−ナ−タイル |
US4759297A (en) * | 1987-08-27 | 1988-07-26 | Norton Company | Furnace burner block |
US5178921A (en) * | 1991-09-03 | 1993-01-12 | Inland Steel Company | Burner block assembly and material |
US6626663B1 (en) * | 2002-08-16 | 2003-09-30 | Fosbal Intellectual Ag | Processes for redistributing heat flux on process tubes within process heaters, and process heaters including the same |
WO2006129063A1 (fr) * | 2005-06-02 | 2006-12-07 | Fosbel Intellectual Limited | Procedes et systemes pour la destruction amelioree de composes organiques volatils |
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US2007605A (en) * | 1931-01-16 | 1935-07-09 | Globar Corp | Electric furnace |
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-
2007
- 2007-01-12 WO PCT/GB2007/000075 patent/WO2007091011A1/fr active Application Filing
- 2007-01-16 US US11/653,440 patent/US20070207418A1/en not_active Abandoned
- 2007-02-08 AR ARP070100526A patent/AR059369A1/es unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2791977A (en) * | 1950-08-03 | 1957-05-14 | Bernitz Furnace Appliance Comp | Refractory burner rings for furnace walls |
JPS61256110A (ja) * | 1985-05-04 | 1986-11-13 | Shoei Seisakusho:Kk | ラジアントカツプバ−ナ−タイル |
US4759297A (en) * | 1987-08-27 | 1988-07-26 | Norton Company | Furnace burner block |
US5178921A (en) * | 1991-09-03 | 1993-01-12 | Inland Steel Company | Burner block assembly and material |
US6626663B1 (en) * | 2002-08-16 | 2003-09-30 | Fosbal Intellectual Ag | Processes for redistributing heat flux on process tubes within process heaters, and process heaters including the same |
WO2006129063A1 (fr) * | 2005-06-02 | 2006-12-07 | Fosbel Intellectual Limited | Procedes et systemes pour la destruction amelioree de composes organiques volatils |
Also Published As
Publication number | Publication date |
---|---|
US20070207418A1 (en) | 2007-09-06 |
AR059369A1 (es) | 2008-03-26 |
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