US20070238058A1 - Longevity and performance improvements to flare tips - Google Patents
Longevity and performance improvements to flare tips Download PDFInfo
- Publication number
- US20070238058A1 US20070238058A1 US11/653,439 US65343907A US2007238058A1 US 20070238058 A1 US20070238058 A1 US 20070238058A1 US 65343907 A US65343907 A US 65343907A US 2007238058 A1 US2007238058 A1 US 2007238058A1
- Authority
- US
- United States
- Prior art keywords
- coating
- low
- flare tip
- flare
- mils
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
- F23G7/08—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases using flares, e.g. in stacks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
- F23G7/08—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases using flares, e.g. in stacks
- F23G7/085—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases using flares, e.g. in stacks in stacks
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
- F23D2900/00018—Means for protecting parts of the burner, e.g. ceramic lining outside of the flame tube
-
- 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
Abstract
Description
- This application is related to and claims domestic priority benefits under 35 USC §119(e) from, U.S. Provisional Patent Application Ser. No. 60/762,531 filed on Jan. 27, 2006, the entire content of the same being expressly incorporated hereinto by reference.
- The present invention relates generally to flare tips employed in the petrochemical industry for burning off-gases associated with the production and/or refining of petroleum-based products. In especially preferred forms, the present invention relates to flare tips coated with a low emissivity (low-E) material so as to improve the longevity and performance thereof.
- Flare tips are notoriously well known in the petroleum industry and are used typically to burn off-gases associated with petroleum production and/or refining. Flare tips are therefore exposed to direct flame during their service life which can of course be quite damaging. As a result, flare tips need to periodically be taken out of service and refurbished which adds to production costs.
- It would therefore be highly desirable if the service life of flare tips could be extended. It would also be especially desirable if the performance characteristics of flare tips could be enhanced. It is towards fulfilling such needs that the present invention is directed.
- Broadly, the present invention is directed to applying a low emissivity (low-E) coating onto flare tips to achieve longer flare tip service life, improved flare tip structural integrity and/or a more stable flame pattern under a wide range of operating conditions. In accordance with some embodiments of the present invention, low-E coatings may be applied to the flare tip burner as well as associated internal and/or external component surfaces to reduce direct flame radiation and also conductive heat transfer.
- In accordance with some embodiments of the invention, the low-E coating material has an emissivity of less than about 0.80, preferably between about 0.20 to about 0.78. The coating thickness of the low-E material is preferably between about 1 mil to about 25 mils, and more preferably between about 2 mils to about 8 mils. Coating densities of the low-E material in the coating will preferably be at least about 65%, more preferably between about 80% to about 100%.
- The improved flare tips in accordance with the present invention therefore result in significantly less deformation and distortion of the flare tip burner as well as its associated internal and/or external components thereby prolonging its useful service life. The low-E ceramic coatings of the present invention will also provide enhanced corrosion and oxidation resistance and further improve the longevity of the flare tip burner as well as its associated internal and/or external components.
- These and other aspects and advantages will become more apparent after careful consideration is given to the following detailed description of the preferred exemplary embodiments thereof.
- Reference will hereinafter be made to the accompanying drawings, wherein like reference numerals throughout the various FIGURES denote like structural elements, and wherein;
-
FIG. 1 is a perspective view of an exemplary flare tip in accordance with the present invention. - According to a presently preferred embodiment of the present invention, a low emissivity (low-E) coating material is applied to the flare tip burner as well as associated internal and/or external component surfaces to reduce direct flame radiation and also conductive heat transfer. An
exemplary flare tip 10 is depicted in accompanyingFIG. 1 as having aflare barrel 12 which terminates in a baffled burner element 14.Flame stabilization tabs 16 are provided at circumferentially spaced-apart locations about the burner element 14 so as to ensure stable and high efficiency flaring through a range of gas flows. According to especially preferred embodiments of the present invention, all exterior and interior surfaces of theflare tip 10 which may have exposure to the flame and its attendant radiation are coated with a low-E ceramic material. Coated structures therefore include, for example, at least an upper portion of theflare barrel 12, the burner element 14, and/or thestabilization tabs 16. - As used herein, 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). According to the present invention, a relatively low emissivity (low-E) is meant to refer to coating materials having an emissivity of less than about 0.80, and especially materials having an emissivity of between about 0.20 to about 0.78.
- Virtually any commercially available low-E coating material may be employed satisfactorily in the practice of the present invention. For example, one presently preferred low-E ceramic coating includes CERAK M700 ceramic coating commercially available form Cetek, Ltd. of Berea, Ohio, having an emissivity of about 0.75.
- Coating thicknesses of the low-E ceramic coating material are 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 1 mil to about 25 mils, usually about 2 mils to about 8 mils may be appropriate. Coating densities will typically be greater than about 65%, more specifically 80% or greater. 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 low-E ceramic coating material that is present in the coating.
- The low-E coating material may be applied to flare tip components in any conventional manner. The low-E coating material may thus be applied to the flare tip components via any pressurized spray system while the flare tip is being manufactured or while off-line (i.e., is not at its operational temperatures) during refurbishment.
- The present invention will be further understood from the following non-limiting Example.
- A high temperature low-emissivity coating (CETEK M720 high-temperature ceramic coating having an emissivity value of about 0.75) was applied to a flare tip manufactured by Callidus Technologies LLC. The low-E coating utilized a non-toxic, non-flammable carrier, with a high temperature ceramic binder and was sprayed onto the flare tip structures to be exposed to direct flame during operation by conventional spray equipment. The sprayed coating was thereafter allowed to dry in air for 4 hours and cured at 1500° F. After curing, the coating on the flare tip surfaces exhibited a thickness of about 3 mils at a coating density of the low-E material of about 100%. The coating was intended to provide excellent thermal barrier protection, oxidation and corrosion resistance to metallic substrates at elevated temperatures up to 2400° F., as well as a reduction in warpage, stress corrosion cracking, and alloy leaching. The coating also was intended to provide uniform heat distribution for enclosed flare systems.
- The flare tip with the low-E coating material applied thereto was placed into service to burn off-gases. After approximately six months of continuous operation, the condition of the coated flare tip surfaces was visually inspected and determined to be satisfactory indicating that the coating material provided protection against the direct flame during flare tip operation.
- While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (22)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/653,439 US20070238058A1 (en) | 2006-01-27 | 2007-01-16 | Longevity and performance improvements to flare tips |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US76253106P | 2006-01-27 | 2006-01-27 | |
US11/653,439 US20070238058A1 (en) | 2006-01-27 | 2007-01-16 | Longevity and performance improvements to flare tips |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070238058A1 true US20070238058A1 (en) | 2007-10-11 |
Family
ID=38121740
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/653,439 Abandoned US20070238058A1 (en) | 2006-01-27 | 2007-01-16 | Longevity and performance improvements to flare tips |
Country Status (16)
Country | Link |
---|---|
US (1) | US20070238058A1 (en) |
EP (1) | EP1979677B1 (en) |
JP (1) | JP5066103B2 (en) |
KR (1) | KR20080098383A (en) |
CN (1) | CN101375102A (en) |
AR (1) | AR059208A1 (en) |
AU (1) | AU2007209180B2 (en) |
BR (1) | BRPI0707271A2 (en) |
CA (1) | CA2637943A1 (en) |
DK (1) | DK1979677T3 (en) |
ES (1) | ES2396997T3 (en) |
PL (1) | PL1979677T3 (en) |
PT (1) | PT1979677E (en) |
RU (1) | RU2433346C2 (en) |
WO (1) | WO2007085793A1 (en) |
ZA (1) | ZA200806553B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100081100A1 (en) * | 2008-10-01 | 2010-04-01 | Wessex Incorporated | Burner Tips |
US20110207064A1 (en) * | 2009-11-23 | 2011-08-25 | Hamworthy Combustion Engineering Limited | Monitoring Flare Stack Pilot Burners |
US20130168470A1 (en) * | 2008-10-01 | 2013-07-04 | John W. Olver | Burner Tips |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5872346B2 (en) * | 2012-03-26 | 2016-03-01 | 中国電力株式会社 | Pilot burner protection device |
US9816705B2 (en) | 2014-11-18 | 2017-11-14 | Honeywell International Inc. | Flare burner for a combustible gas |
US10598375B2 (en) | 2016-11-01 | 2020-03-24 | Honeywell International Inc. | Asymmetrical and offset flare tip for flare burners |
Citations (30)
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US2781636A (en) * | 1952-06-23 | 1957-02-19 | Fulmer Res Inst Ltd | Low emissivity coatings for metal surfaces |
US3234640A (en) * | 1960-05-03 | 1966-02-15 | John G Lewis | Method of making shielding for high temperature furnace |
US3363090A (en) * | 1965-07-27 | 1968-01-09 | Engelhard Ind Inc | Electric heating element |
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US3885919A (en) * | 1972-11-24 | 1975-05-27 | Marcel T Pillard | Residual gas burner with superimposed, increasing size burning chambers |
US3954386A (en) * | 1973-05-18 | 1976-05-04 | Gesellschaft Fur Huttenwerksanlagen Mbh | Flare burner for burning off combustible waste gases |
US4003693A (en) * | 1975-03-06 | 1977-01-18 | Combustion Unlimited Incorporated | Flare stack gas burner |
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US4716086A (en) * | 1984-12-19 | 1987-12-29 | Ppg Industries, Inc. | Protective overcoat for low emissivity coated article |
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US20070207418A1 (en) * | 2006-02-09 | 2007-09-06 | Fosbel Intellectual Limited | Refractory burner tiles having improved emissivity and combustion apparatus employing the same |
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2007
- 2007-01-12 WO PCT/GB2007/000068 patent/WO2007085793A1/en active Application Filing
- 2007-01-12 AU AU2007209180A patent/AU2007209180B2/en not_active Ceased
- 2007-01-12 BR BRPI0707271-6A patent/BRPI0707271A2/en not_active IP Right Cessation
- 2007-01-12 EP EP07704896A patent/EP1979677B1/en not_active Not-in-force
- 2007-01-12 KR KR1020087020875A patent/KR20080098383A/en not_active Application Discontinuation
- 2007-01-12 PL PL07704896T patent/PL1979677T3/en unknown
- 2007-01-12 RU RU2008134888/06A patent/RU2433346C2/en not_active IP Right Cessation
- 2007-01-12 ZA ZA200806553A patent/ZA200806553B/en unknown
- 2007-01-12 JP JP2008551851A patent/JP5066103B2/en not_active Expired - Fee Related
- 2007-01-12 PT PT77048965T patent/PT1979677E/en unknown
- 2007-01-12 DK DK07704896.5T patent/DK1979677T3/en active
- 2007-01-12 ES ES07704896T patent/ES2396997T3/en active Active
- 2007-01-12 CA CA002637943A patent/CA2637943A1/en not_active Abandoned
- 2007-01-12 CN CNA2007800034805A patent/CN101375102A/en active Pending
- 2007-01-16 US US11/653,439 patent/US20070238058A1/en not_active Abandoned
- 2007-01-26 AR ARP070100344A patent/AR059208A1/en unknown
Patent Citations (30)
Publication number | Priority date | Publication date | Assignee | Title |
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US2781636A (en) * | 1952-06-23 | 1957-02-19 | Fulmer Res Inst Ltd | Low emissivity coatings for metal surfaces |
US3234640A (en) * | 1960-05-03 | 1966-02-15 | John G Lewis | Method of making shielding for high temperature furnace |
US3363090A (en) * | 1965-07-27 | 1968-01-09 | Engelhard Ind Inc | Electric heating element |
US3749546A (en) * | 1971-09-20 | 1973-07-31 | Zink Co John | Smokeless flare pit burner and method |
US3885919A (en) * | 1972-11-24 | 1975-05-27 | Marcel T Pillard | Residual gas burner with superimposed, increasing size burning chambers |
US3954386A (en) * | 1973-05-18 | 1976-05-04 | Gesellschaft Fur Huttenwerksanlagen Mbh | Flare burner for burning off combustible waste gases |
US3824073A (en) * | 1973-08-13 | 1974-07-16 | Combustion Unltd Inc | Flare stack gas burner |
US3822985A (en) * | 1973-08-13 | 1974-07-09 | Combustion Unltd Inc | Flare stack gas burner |
US4003693A (en) * | 1975-03-06 | 1977-01-18 | Combustion Unlimited Incorporated | Flare stack gas burner |
US4038024A (en) * | 1975-12-03 | 1977-07-26 | Combustion Unlimited Incorporated | Flare stack gas burner |
US4716086A (en) * | 1984-12-19 | 1987-12-29 | Ppg Industries, Inc. | Protective overcoat for low emissivity coated article |
US4810553A (en) * | 1985-12-18 | 1989-03-07 | Lucio Lombardozzi | Thermal panel |
US4810300A (en) * | 1986-11-06 | 1989-03-07 | Zyp Coatings, Inc. | Binder/suspension composition yielding water insolubility alone or with additives |
US4942732A (en) * | 1987-08-17 | 1990-07-24 | Barson Corporation | Refractory metal composite coated article |
US4889776A (en) * | 1987-08-17 | 1989-12-26 | Barson Corporation | Refractory metal composite coated article |
US5420399A (en) * | 1992-01-16 | 1995-05-30 | University Of Cincinnati | Electrical heating element, related composites, and composition and method for producing such products using dieless micropyretic synthesis |
US5590383A (en) * | 1993-03-12 | 1996-12-31 | Micropyretics Heaters International, Inc. | Porous membranes and methods for making |
US6210791B1 (en) * | 1995-11-30 | 2001-04-03 | General Electric Company | Article with a diffuse reflective barrier coating and a low-emissity coating thereon, and its preparation |
US5851679A (en) * | 1996-12-17 | 1998-12-22 | General Electric Company | Multilayer dielectric stack coated part for contact with combustion gases |
US6162509A (en) * | 1997-07-30 | 2000-12-19 | Fosbel International Limited | High frequency induction fusing |
US6181727B1 (en) * | 1999-04-19 | 2001-01-30 | General Electric Company | Coating for reducing operating temperatures of chamber components of a coating apparatus |
US6896646B2 (en) * | 2002-03-22 | 2005-05-24 | Corning Incorporated | Pulling rolls for use in manufacturing sheet glass |
US6656016B1 (en) * | 2002-08-16 | 2003-12-02 | Fosbel Intellectual Ag | Sand blasting apparatus and methods |
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 |
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US20070207418A1 (en) * | 2006-02-09 | 2007-09-06 | Fosbel Intellectual Limited | Refractory burner tiles having improved emissivity and combustion apparatus employing the same |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100081100A1 (en) * | 2008-10-01 | 2010-04-01 | Wessex Incorporated | Burner Tips |
US20130168470A1 (en) * | 2008-10-01 | 2013-07-04 | John W. Olver | Burner Tips |
US20110207064A1 (en) * | 2009-11-23 | 2011-08-25 | Hamworthy Combustion Engineering Limited | Monitoring Flare Stack Pilot Burners |
Also Published As
Publication number | Publication date |
---|---|
AU2007209180A1 (en) | 2007-08-02 |
RU2008134888A (en) | 2010-03-10 |
JP2009524795A (en) | 2009-07-02 |
EP1979677A1 (en) | 2008-10-15 |
CA2637943A1 (en) | 2007-08-02 |
BRPI0707271A2 (en) | 2011-04-26 |
KR20080098383A (en) | 2008-11-07 |
AR059208A1 (en) | 2008-03-19 |
EP1979677B1 (en) | 2012-10-10 |
WO2007085793A1 (en) | 2007-08-02 |
CN101375102A (en) | 2009-02-25 |
PT1979677E (en) | 2013-01-07 |
JP5066103B2 (en) | 2012-11-07 |
PL1979677T3 (en) | 2013-02-28 |
ES2396997T3 (en) | 2013-03-01 |
ZA200806553B (en) | 2009-11-25 |
DK1979677T3 (en) | 2013-01-14 |
RU2433346C2 (en) | 2011-11-10 |
AU2007209180B2 (en) | 2011-11-24 |
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