EP4314652B1 - Tête de brûleur pour combustibles à l'état fluide et utilisation de la tête de brûleur - Google Patents

Tête de brûleur pour combustibles à l'état fluide et utilisation de la tête de brûleur

Info

Publication number
EP4314652B1
EP4314652B1 EP22715602.3A EP22715602A EP4314652B1 EP 4314652 B1 EP4314652 B1 EP 4314652B1 EP 22715602 A EP22715602 A EP 22715602A EP 4314652 B1 EP4314652 B1 EP 4314652B1
Authority
EP
European Patent Office
Prior art keywords
burner head
tube
fluid
fluid burner
cap
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.)
Active
Application number
EP22715602.3A
Other languages
German (de)
English (en)
Other versions
EP4314652A1 (fr
EP4314652C0 (fr
Inventor
Lars SKYTTE JORGENSEN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alfa Laval Corporate AB
Original Assignee
Alfa Laval Corporate AB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Alfa Laval Corporate AB filed Critical Alfa Laval Corporate AB
Publication of EP4314652A1 publication Critical patent/EP4314652A1/fr
Application granted granted Critical
Publication of EP4314652B1 publication Critical patent/EP4314652B1/fr
Publication of EP4314652C0 publication Critical patent/EP4314652C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
    • F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details
    • F23D14/48—Nozzles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details
    • F23D14/70—Baffles or like flow-disturbing devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63J—AUXILIARIES ON VESSELS
    • B63J99/00—Subject matter not provided for in other groups of this subclass
    • B63J2099/001—Burning of transported goods, e.g. fuel, boil-off or refuse
    • B63J2099/003—Burning of transported goods, e.g. fuel, boil-off or refuse of cargo oil or fuel, or of boil-off gases, e.g. for propulsive purposes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/101—Flame diffusing means characterised by surface shape
    • F23D2203/1017—Flame diffusing means characterised by surface shape curved

Definitions

  • the invention relates to a fluid burner head for a fluid combustion unit, and its design.
  • the invention also relates to a use of such a fluid burner head in a fluid combustion unit for burning boil-off gas from a fuel tank onboard a ship.
  • gas combustion units are typically installed onboard LNG carriers, i.e. tank ships arranged to transport liquefied natural gas, LNG.
  • LNG which has a vaporization temperature of -160 degrees Celsius at atmospheric pressure, is contained in tanks. Even if these tanks are insulated, some evaporation of the LNG will inevitably take place and form so-called boil-off gas. This boil-off gas increases the pressure in the tanks and must be discharged from the tanks for the sake of safety.
  • the boil-off gas removed from the tanks may be re-liquefied and returned to the tanks, used as fuel onboard the LNG carriers, or combusted by means of the gas combustion units.
  • a gas combustion unit may typically comprise a gas burner head extending into a combustion chamber.
  • the gas to be combusted is fed, via the gas burner head, to the combustion chamber where it is ignited and burned.
  • a known gas burner head comprises a perforated tube with an end closed by a cap. The gas is conveyed through the tube and, through the perforations of the tube, into the combustion chamber where the combustion takes place in a flame.
  • the gas pressure is relatively high, the gas will be fed through the perforations at a high velocity which will result in a flame at some distance from the gas burner head. Further, the gas flow inside the tube will cool the gas burner head. As a result, the temperature of the gas burner head will be kept low enough so as to avoid damages thereto.
  • a fluid burner head for a fluid combustion unit comprises a body.
  • the body comprises a hollow tube or pipe for conveying a fluid to be combusted into a combustion chamber and a cap which at least partly closes an upper end of the tube.
  • the tube further comprises a lower end for receiving the fluid in the tube, i.e. in an interior of the tube.
  • a wall of the tube comprises a plurality of rows of holes, which rows extend around a longitudinal center axis of the fluid burner head. The holes permit a flow of the fluid to be combusted from the interior to an exterior of the tube, i.e. through the wall of the tube.
  • the fluid burner head is characterized in that it further comprises an annular first projection or protrusion extending around the longitudinal center axis of the fluid burner head.
  • the first projection is projecting obliquely from an outer surface of the body and in a direction away from the lower end of the tube, i.e. upwards, above an uppermost row of holes of the tube, with an angle ⁇ relative to the longitudinal center axis of the fluid burner head, wherein 0 ⁇ ⁇ ⁇ 90 degrees.
  • the uppermost row of holes is the row of holes being arranged closest to the cap.
  • the fluid may be a gas or a mixture of a gas and a liquid.
  • the fluid may be boil-off gas from a LNG tank, such as methane or a mixture of methane and nitrogen.
  • the tube could be a perforated tube and the openings could be perforations of the tube.
  • the tube may be elongate, have any suitable wall thickness and have any suitable cross section, such as circular, oval or polygonal.
  • the tube may be made of any suitable material such as a metal, for example carbon steel, stainless steel or aluminum.
  • the longitudinal center axis of the fluid burner head may coincide with a longitudinal center axis of the tube.
  • plurality of rows is here meant two or more rows.
  • the holes, openings, apertures or perforations of the tube may or may not all have the same size and/or shape, and they may have any suitable size and shape, such as circular, oval or polygonal. Further, the holes may or may not be equidistantly arranged.
  • the cap closes the upper end of the tube at least partly.
  • an only partly closed upper end may for example mean that it is possible for gas to pass from within the tube to an outside thereof through an opening in the cap or between the tube and the cap.
  • the first projection may be arranged anywhere between the uppermost row of holes of the tube and an upper end of the fluid burner head.
  • the first projection projects from the outer surface of the body at a border between the tube and the cap. Without the first projection in place, the temperature locally at the border between the tube and the cap tends to be relatively high. Thus, by arranging the first projection at the tube-cap border, the risk of damages to the fluid burner head may be minimized.
  • the fluid burner head may be so constructed that the tube and the first projection are separately formed. Thereby, when the first projection is worn out it can be replaced with a new one without having to discard the tube and possibly the cap.
  • the tube may have a varying cross section along its longitudinal center axis.
  • an upper portion of the tube comprising the holes has an essentially uniform cross section along the longitudinal center axis of the fluid burner head. This may facilitate production of the fluid burner head.
  • the fluid burner head may further comprise an annular support extending around the longitudinal center axis of the fluid burner head.
  • the support may be connected to the first projection and engage with the body of the fluid burner head to fix the first projection to the body.
  • Such a design may facilitate the arrangement of the first projection on the body.
  • the support may or may not have a uniform cross section along its longitudinal extension, and be continuous or discontinuous.
  • the fluid burner head may further comprise an annular second projection extending around the longitudinal center axis of the fluid burner head.
  • the second projection may project from the outer surface of the body between the uppermost row of holes of the tube and the first projection.
  • the first projection may or may not project beyond the second projection.
  • the second projection may aid in forcing the fluid to be combusted away from the fluid burner head to further reduce the temperature of the fluid burner head and, thereby, the risk of damages to the fluid burner head, also when the fluid is fed through the holes of the tube at a relatively low velocity.
  • the second projection may project from an outer surface of the tube to shield the tube locally in an area where the temperature of the tube otherwise tends to be relatively high. The risk of damages to the tube may thereby be minimized.
  • the support may engage in different ways with the body. As an example, it may be threaded onto the body with a tight fit so as to stay in place by friction. However, according to one embodiment of the invention, the support is clamped between the cap and the tube. Thereby, a precise location of the first projection and possibly also the second projection may be enabled, together with a reliable engagement between the support and the body of the fluid burner head.
  • a fluid combustion unit 1 more particularly a gas combustion unit, is illustrated.
  • the fluid or gas combustion unit 1 is arranged onboard a ship (not illustrated), more particularly an LNG carrier, for burning boil-off gas from one or more LNG tanks of the ship.
  • the fluid combustion unit 1 comprises a fluid burner system 3, an air supply system (not illustrated), a combustion chamber 5 and a stack 7.
  • Boil-off gas from the LNG tank(s) is fed to the fluid burner system 3 and further into the combustion chamber 5 wherein it is ignited and combusted.
  • the combustion products leave the combustion chamber 5 to be mixed with cool air in the stack 7 before leaving the fluid combustion unit 1.
  • the construction and function of fluid combustion units are well-known within the art and will not be described in further detail herein.
  • the fluid burner system 3 comprises a fluid burner head 9, more particularly a gas burner head, which is illustrated in further detail in Figs. 2-6 .
  • the fluid burner head 9 comprises a body 11, which in turn comprises a hollow, elongate stainless steel tube 13 and a solid cap 15 of refractory concrete.
  • the tube 13 and the cap 15 are discrete separable elements having a circular outer periphery as seen along a longitudinal center axis C of the fluid burner head 9.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Combustion Of Fluid Fuel (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)

Claims (15)

  1. Tête de brûleur de fluide (9) pour une unité à combustion de fluide (1) comprenant un corps (11) qui à son tour comprend un tube creux (13) destiné à convoyer un fluide à mettre en combustion dans une chambre de combustion (5) et un obturateur (15) qui ferme au moins partiellement une extrémité supérieure (25) du tube (13), le tube (13) comprenant en outre une extrémité inférieure (19) destinée à recevoir le fluide dans le tube (13), une paroi (17) du tube (13) comprenant une pluralité de rangées (29) de trous (27), lesquelles rangées (29) s'étendent autour d'un axe central longitudinal (C) de la tête de brûleur de fluide (9), une rangée la plus haute (29a) de trous (27) étant la rangée de trous (27) agencée le plus près de l'obturateur (15), dans laquelle les trous (27) permettent un flux du fluide à mettre en combustion d'un intérieur (49) à un extérieur (51) du tube (13), la tête de brûleur de fluide (9) étant caractérisée en ce qu'elle comprend en outre une première saillie annulaire (39) s'étendant autour de l'axe central longitudinal (C) de la tête de brûleur de fluide (9) et faisant saillie de manière oblique d'une surface externe (43) du corps (11) et à l'écart de l'extrémité inférieure (19) du tube (13), au-dessus de la rangée la plus haute (29a) de trous (27) du tube (13), avec un angle α par rapport à l'axe central longitudinal (C) de la tête de brûleur de fluide (9), dans laquelle 0 < α < 90 degrés.
  2. Tête de brûleur de fluide (9) selon la revendication 1, dans laquelle le tube (13) et l'obturateur (15) sont formés séparément.
  3. Tête de brûleur de fluide (9) selon l'une quelconque des revendications précédentes, dans laquelle l'obturateur (15) et le tube (13) sont faits de matériaux différents.
  4. Tête de brûleur de fluide (9) selon l'une quelconque des revendications précédentes, dans laquelle la première saillie (39) fait saillie à partir de la surface externe (43) du corps (11) au niveau d'une limite (45) entre le tube (13) et l'obturateur (15).
  5. Tête de brûleur de fluide (9) selon l'une quelconque des revendications précédentes, dans laquelle le tube (13) et la première saillie (39) sont formés séparément.
  6. Tête de brûleur de fluide (9) selon l'une quelconque des revendications précédentes, dans laquelle une portion supérieure (23) du tube (13) comprenant lesdits trous (27) présente une section transversale sensiblement uniforme le long de l'axe central longitudinal (C) de la tête de brûleur de fluide (9).
  7. Tête de brûleur de fluide (9) selon l'une quelconque des revendications précédentes, comprenant en outre un support annulaire (37) s'étendant autour de l'axe central longitudinal (C) de la tête de brûleur de fluide (9), lequel support (37) est connecté à la première saillie (39) et entre en prise avec le corps (11) de la tête de brûleur de fluide (9) pour fixer la première saillie (39) au corps (11).
  8. Tête de brûleur de fluide (9) selon l'une quelconque des revendications 1 à 6, comprenant en outre une seconde saillie annulaire (41) s'étendant autour de l'axe central longitudinal (C) de la tête de brûleur de fluide (9) et faisant saillie à partir de la surface externe (43) du corps (11) entre la rangée la plus haute (29a) de trous (27) du tube (13) et la première saillie (39).
  9. Tête de brûleur de fluide (9) selon la revendication 8, dans laquelle la seconde saillie (41) fait saillie à partir d'une surface externe (47) du tube (13).
  10. Tête de brûleur de fluide (9) selon l'une quelconque des revendications 8 à 9, comprenant en outre un support annulaire (37) s'étendant autour de l'axe central longitudinal (C) de la tête de brûleur de fluide (9), lequel support (37) est connecté aux première et seconde saillies (39, 41) et entre en prise avec le corps (11) de la tête de brûleur de fluide (9) pour fixer les première et seconde saillies (39, 41) au corps (11).
  11. Tête de brûleur de fluide (9) selon l'une quelconque des revendications 7 ou 10, dans laquelle le support (37) est serré entre l'obturateur (15) et le tube (13).
  12. Tête de brûleur de fluide (9) selon l'une quelconque des revendications précédentes, dans laquelle l'obturateur (15) comprend une portion supérieure (31) et une portion inférieure (33), dans laquelle la portion inférieure (33) fait saillie dans le tube (13).
  13. Tête de brûleur de fluide (9) selon la revendication 12, dans laquelle la portion inférieure (33) comprend une partie qui s'effile dans une direction à l'écart de la portion supérieure (31) de l'obturateur (15).
  14. Tête de brûleur de fluide (9) selon l'une quelconque des revendications 12 à 13, dans laquelle une circonférence externe de la portion supérieure (31) de l'obturateur (15) est plus grande qu'une circonférence interne du tube (13).
  15. Utilisation d'une tête de brûleur de fluide (9) selon l'une quelconque des revendications 1 à 14 dans une unité à combustion de fluide (1) destinée à brûler du gaz d'évaporation issu d'une soute à combustible à bord d'un navire.
EP22715602.3A 2021-03-24 2022-03-16 Tête de brûleur pour combustibles à l'état fluide et utilisation de la tête de brûleur Active EP4314652B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP21164574.2A EP4063731A1 (fr) 2021-03-24 2021-03-24 Tête de brûleur pour combustibles à l'état fluide et utilisation de la tête de brûleur
PCT/EP2022/056856 WO2022200150A1 (fr) 2021-03-24 2022-03-16 Tête de brûleur à fluide et utilisation d'une tête de brûleur à fluide

Publications (3)

Publication Number Publication Date
EP4314652A1 EP4314652A1 (fr) 2024-02-07
EP4314652B1 true EP4314652B1 (fr) 2025-07-16
EP4314652C0 EP4314652C0 (fr) 2025-07-16

Family

ID=75203195

Family Applications (2)

Application Number Title Priority Date Filing Date
EP21164574.2A Withdrawn EP4063731A1 (fr) 2021-03-24 2021-03-24 Tête de brûleur pour combustibles à l'état fluide et utilisation de la tête de brûleur
EP22715602.3A Active EP4314652B1 (fr) 2021-03-24 2022-03-16 Tête de brûleur pour combustibles à l'état fluide et utilisation de la tête de brûleur

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP21164574.2A Withdrawn EP4063731A1 (fr) 2021-03-24 2021-03-24 Tête de brûleur pour combustibles à l'état fluide et utilisation de la tête de brûleur

Country Status (7)

Country Link
EP (2) EP4063731A1 (fr)
JP (1) JP7634707B2 (fr)
KR (1) KR102871770B1 (fr)
CN (1) CN117043514A (fr)
PL (1) PL4314652T3 (fr)
TW (1) TWI868435B (fr)
WO (1) WO2022200150A1 (fr)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6229820A (ja) * 1985-04-26 1987-02-07 Nippon Kokan Kk <Nkk> 直火還元加熱バ−ナ
JPH0777314A (ja) * 1993-09-06 1995-03-20 Toho Gas Co Ltd ガスバーナ
JPH11337022A (ja) * 1998-05-28 1999-12-10 Samson Co Ltd 低ＮＯｘガスバーナ
FR2788588A1 (fr) * 1999-01-14 2000-07-21 Pillard Chauffage Procede et dispositif d'incineration de gaz polluant
JP2001116212A (ja) * 1999-10-22 2001-04-27 Hirakawa Guidom:Kk 先混合方式低ＮＯｘガスバーナ
GB0120661D0 (en) * 2001-08-24 2001-10-17 Cryostar France Sa Natural gas supply apparatus
JP5072640B2 (ja) * 2008-02-22 2012-11-14 三菱重工業株式会社 ガス燃焼装置
MX2012006599A (es) * 2012-06-08 2013-12-16 Jorge Rivera Garza Quemador de combustible gaseoso con elevada eficiencia energetica y de combustion, baja emision de contaminantes y mayor transferencia de calor.
KR20160086610A (ko) * 2015-01-12 2016-07-20 강림중공업 주식회사 버너 및 이를 이용한 증발가스 처리장치용 가스연소기
JP5867645B1 (ja) * 2015-03-20 2016-02-24 富士ゼロックス株式会社 ノズル先端部材、ノズル、はんだ付け装置、基板装置の製造方法
TWM580658U (zh) * 2019-04-10 2019-07-11 台灣櫻花股份有限公司 Gas stove high efficiency fire cover

Also Published As

Publication number Publication date
KR20230156106A (ko) 2023-11-13
EP4314652A1 (fr) 2024-02-07
KR102871770B1 (ko) 2025-10-16
JP7634707B2 (ja) 2025-02-21
TWI868435B (zh) 2025-01-01
PL4314652T3 (pl) 2025-08-25
EP4063731A1 (fr) 2022-09-28
EP4314652C0 (fr) 2025-07-16
JP2024508005A (ja) 2024-02-21
CN117043514A (zh) 2023-11-10
WO2022200150A1 (fr) 2022-09-29
TW202248570A (zh) 2022-12-16

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