WO1984001205A1 - Radiant wall burner - Google Patents

Radiant wall burner Download PDF

Info

Publication number
WO1984001205A1
WO1984001205A1 PCT/US1983/001409 US8301409W WO8401205A1 WO 1984001205 A1 WO1984001205 A1 WO 1984001205A1 US 8301409 W US8301409 W US 8301409W WO 8401205 A1 WO8401205 A1 WO 8401205A1
Authority
WO
WIPO (PCT)
Prior art keywords
radiant wall
assembly
ring shaped
wall burner
discharge ports
Prior art date
Application number
PCT/US1983/001409
Other languages
French (fr)
Inventor
Eugene C Mcgill
Lee R Massey
Michael James Martin
David L Giles
Original Assignee
Mc Gill Inc
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 Mc Gill Inc filed Critical Mc Gill Inc
Priority to AU20400/83A priority Critical patent/AU2040083A/en
Publication of WO1984001205A1 publication Critical patent/WO1984001205A1/en

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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
    • F23D14/12—Radiant burners
    • F23D14/125—Radiant burners heating a wall surface to incandescence
    • 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, e.g. noise reduction means
    • F23D14/48—Nozzles
    • F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
    • F23D14/583—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration of elongated shape, e.g. slits
    • 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
    • F23D2203/1012—Flame diffusing means characterised by surface shape tubular
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/108—Flame diffusing means with stacked sheets or strips forming the outlets

Definitions

  • the present invention relates generally to the field of radiant wall burner assemblies, and more particularly but not by way of limitation, to a radiant wall burner ' assembly for discharging gaseous fuel over the face of a ceramic member to provide a high temperature source of radiant heat dispersed over a relatively large area of the face of the wall of a furnace to be fired.
  • An object of the present invention is to provide a radiant wall burner assembly having an improved BTU output without suffering from the limitations of the prior art burner assemblies.
  • Another object of the present invention is to provide • an improved radiant wall burner assembly having an improved coefficient of discharge.
  • Another object of the present invention is to provide an improved radiant wall burner assembly which minimizes the possibility of flashback from the combustion zone into the burner assembly when the gaseous fuel contains appreciable quantities of rapidly reacting gaseous fuel mixtures.
  • Another object of the present invention while achieving the above stated objects, is to provide an improved radiant wall burner assembly which is easily installed and which is cost effective.
  • an improved radiant wall burner assembly comprising a tubular body member having an upstream portion and a downstream portion, the tubular body member being adapted to receive and mix fuel and air during passage therethrough; and, a burner tip housing assembly operably connected to the downstream portion of the tubular body member, the burner tip housing assembly having a plurality of circumferential discharge ports formed therein such that the fuel and air mixture discharged via the discharge ports is discharged in a plane substantially normal to the longitudinal axis of the tubular body member and the burner tip housing assembly.
  • the improved radiant wall burner assembly of the present invention comprises a tubular member having an upstream
  • end portion and a downstream end portion at least one ring shaped member supported by the downstream end of the tubular member, a spacer assembly for maintaining the ring shaped members in predetermined spatial relationship to form the circumferential discharge ports, and a closure member positioned on and connected to the outmost ring shaped member for enclosing the downstream end portion of ' the tubular body member and directing the flow of gaseous fluid in the tubular member to exit via the circumferential discharge ports.
  • Figure 1 is an elevational view of a radiant wall burner assembly positioned within a ceramic member and illustrating a portion of the wall of a combustion chamber.
  • Figure 2 is a cross-section of the radiant wall burner assembly constructed in accordance with the present invention, the burner assembly being shown in relation to the furnace construction.
  • Figure 3 is a fragmentary view of the burner tip housing assembly of Figure 2 wherein the gaseous discharge ports are disposed such that the mixture of fuel and air is dispersed in a planar discharge substantial normal to the longitudinal axis of the tubular body member and the burner tip housing assembly.
  • Figure 4 is a perspective view of another embodiment of a burner tip housing assembly constructed in accordance with the present invention.
  • FIG. 5 is a fragmentary, partially cutaway view of another burner tip housing assembly constructed in accordance with the present invention wherein the of circumferential discharge ports are disposed such that the mixture of fuel and air is dispersed in a planar discharge substantially normal to the longitudinal axes of the tubular member and angled somewhat in the direction of the face of the furnace wall.
  • Figure 6 is a fragmentary, partially cutaway view of yet another burner tip housing assembly constructed in accordance with the present invention wherein the circumferential discharge ports are disposed such that the mixture of fuel and air is dispersed from the circumferential discharge ports in a planar discharge substantially normal to the longitudinal axis of the tubular body member and angled somewhat away from the face of the furnace.
  • Figure 7 is an elevational view of one embodiment of a ring shaped member having a stand off member extending therefrom for forming the circumferential discharge ports in the burner tip assembly of the present invention.
  • Figure 8A is an enlarged perspective view depicting a spacer element of the radiant wall burner assembly of the present invention, the spacer element being employed to maintain the ring shaped members of the burner tip housing assembly in a predetermined spatial relationship so as to form the circumferential discharge ports.
  • Figure 8B is a top plan view of the spacer member of Figure 8A depicting the flow of the gaseous fluid around same.
  • Figure 8C is an enlarged perspective view of another spacer member of the radiant wall burner assembly of the present invention, the spacer member having an aerodynamical shape so that the gaseous fluid flowing past same will be caused to be dispersed substantially uniformly around the periphery of the spacer member.
  • Figure 8D is a top plan view of the spacer member of Figure 8C illustrating the flow of the gaseous fluid substantially uniformly around the periphery of such member.
  • Figure 9A is an enlarged cross-sectional view of two adjacently disposed ring shaped members of the burner tip housing assembly of the present invention, the ring shaped members defining a circumferential discharge port having a converging flow path for passage of gaseous fluids therethrough.
  • Figure 9B is an enlarged cross-sectional view of two adjacently disposed ring shaped members of the burner tip housing assembly of the present invention, the ring shaped members defining a circum erential discharge port having a converging and diverging flow path for passage of gaseous fluids passing therethrough.
  • Figure 9C is an enlarged cross-sectional view of two adjacently disposed ring shaped members of the burner tip housing assembly of the present invention, the ring shaped ' members defining a circumferential discharge port having a converging and straight flow path for passage of gaseous fluid therethrough.
  • Figure 9D is an enlarged cross-sectional view of two adjacently disposed ring shaped members of the burner tip housing assembly of the present invention, the ring shaped members defining a circumferential discharge port having a straight flow path for passage of gaseous fluid therethrough.
  • FIG. 10 shown therein and designated by the numeral 10 is an improved radiant wall burner assembly inserted into a furnace area 12 through an opening 14 in a wall 16 of a furnace. Centering spacers (not shown) support the radiant wall burner assembly 10 in the wall 16 of the furnace.
  • the furnace wall 16 is generally constructed of a steel outer wall 18, sometimes referred to as the outer surface of the furnace wall 16, and a thick lining of refractory or ceramic bricks 20.
  • a block 22, through which the radiant wall burner assembly 10 is inserted, is generally formed " of a ceramic material.
  • a plate 24, which supports the radiant wall burner assembly 10 by any suitable means, such as welding, is secured to the outer steel wall 18 by bolts 26.
  • a temperature expansion material 26 is positioned between the refractory or ceramic bricks 20 and the block 22 to seal the joint formed therebetween.
  • a gaseous fuel enters the radiant wall burner assembly 10 through a pipe 28 and a spud 30.
  • the gaseous fuel issues from the spud 30 at high velocity and creates
  • OMPI a low pressure zone so that primary air is drawn through an opening 32 as shown by the arrow 34.
  • the opening 32, and thus the flow of primary air therethrough, is adjusted by moving a door 36 so that an optimum volume of combustion supporting air is provided in the radiant wall burner assembly 10.
  • the fuel and air exit the burner assembly 10 via a burner tip housing assembly 38.
  • An adjustable air door 40 permits a volume of secondary air to enter the opening 14 and to pass therethrough and around the burner tip housing assembly 38 and into the furnace area 12.
  • the radiant wall burner assembly 10 has a tubular member 50 having an upstream end portion 52 and a downstream end portion 54, and the burner tip housing assembly 38 has a plurality of circumferential discharge ports 56 disposed therein for discharging the gaseous fluid flowing in the radiant wall burner assembly 10 in a planar discharge direction substantially normal to the longitudinal axis 58 of the tubular member 50.
  • the tubular member 50 and the burner tip housing assembly 38 of the radiant wall burner assembly 10 can be constructed as an integral unit, but desirably will be constructed as two separate units such that the burner tip housing assembly 38 can be connected to the downstream end portion 54 of the tubular member 50 as shown in Figure 2.
  • the tubular member 50 is desirably flared outwardly from its axis 58 in the direction from the upstream end portion 52 to the downstream end portion 54.
  • the burner tip housing assembly 38 is provided with a cyclindrical shaped body portion 60 having at least one of the circumferential discharge ports 56 formed therein, and a closure member 62.
  • the closure member 62 closes off the downstream end portion 54 of the tubular member 50 and directs the flow of the gaseous fluid passing through the radiant wall burner assembly 10 to exit therefrom via the circumferential discharge ports 56, shown more fully in Figure 3, which will be described hereinbelow.
  • the circumferential discharge ports 56 of the burner tip housing assembly 50 can be formed in numerous ways, the only criteria being that the disposition of the circumferential discharge slots 56 be such that the dispersement of the gaseous fluid passing therethrough is in a planar discharge substantially normal to the longitudinal axis 56 of the tubular member 50.
  • circumferential discharge ports 56A are formed by cutting a plurality of staggered slots within a cylindrically shaped body portion 60A of a burner tip housing assembly 38A.
  • the presently preferred method of constructing the burner tip housing assembly 38 is as shown in Figures 2 and 3.
  • the burner tip housing assembly 38 functions as the gas discharge assembly of the radiant wall burner assembly 10, includes the closure member 62, a plurality of ring shaped members 70, a plurality of spacer members 72, a tubular base base portion 73, and a connector member 74 for interconnecting the closure member 62, the ring shaped members 70, the spacer members 72, and the tubular base portion 73 such that in an assembled position each of the elements cooperate to form the circumferential discharge ports 56 in the burner tip housing assembly 38.
  • the closure member 62 which closes off the downstream end portion 54 of the tubular member 50 and serves to direct the flow of the gaseous fluids through the circumferential discharge ports 56, is provided with an inner surface 76 having a conically curved configuration substantially as shown.
  • the conically curved configuration of the inner surface 76 assists in directing of the gas and fuel mixture from the radiant wall burner assembly 10 to the circumferential discharge ports 56 of the burner tip housing assembly 38.
  • the number of the ring shaped members 70 and spacer ' members 72 employed to define the circumferential discharge ports 56 can vary and will be dependent to a large degree upon the specifications of the radiant wall burner assembly 10.
  • Each of the ring shaped members 70 is provided with a plurality of apertures extending therethrough for receiving the connecting members 74.
  • each of the spacer members 72 is provided with an aperture therein for passage of the connector members 74.
  • the spacer members 72 will be more fully described hereinafter with reference to Figures 8A, 8B, 8C and 8D.
  • the connector member 72 can be any suitable connector, and as depicted in the drawings, is a bolt 78 having a headed end portion 80 and a connector end portion 82.
  • the connector end portion 82 of the bolt 78 is secured to the tubular base portion 73 by any suitable means, such as threading engagement therewith.
  • the tubular base portion 73 is provided with a first end 84 and an opposed second end 86.
  • the second end 86 is provided with a plurality of threaded bores adapted to receive the connector end portion 82 of the bolt 78 substantially as shown in the drawings.
  • the distil end burner tip housing assembly 38 is threaded, as is the outer surface of the downstream end 54 of the tubular member 50, and the burner tip housing assembly 38 is threadingly joined to the downstream end portion 54 of the tubular member 50.
  • the closure member 62 is preferably provided with a recessed portion 88 in its outer surface 90.
  • the recessed portion 88 is adapted to receive the headed end portion 80 of the bolt 78 when the burner tip housing assembly 38 is in the assembled position.
  • the headed end portion 80 of the bolt 78 will be flush with the outer surface 90 of the closure member 62 and can be secured in place by spotwelding if desired.
  • the unique design of the burner tip housing assembly 38, and the interconnection of the closure member 62, the ring shaped members 70, the spacer members 72, and the tubular base portion 73 enables one to selectively • position the direction of flow through the circumferential discharge ports 56 formed between the stacked ring shaped members 70.
  • the configuration of the ring shaped member 70 and the spacer member 72 is such that the flow of the fuel and gas mixture exiting the circumferential discharge ports 56 will be in a planar discharge substantially normal to the axis 58 of the tubular member 50.
  • a burner tip housing assembly 38B and the interconnection of closure member 62B, ring shaped members 70B, each having an outer beveled surfaces 71, spacer members 72B and the tubular base portion 73B via the connector me ⁇ ibers 74 enables one to selectively position the direction of flow through circu ferentially discharge ports 56B in a preselected angular direction towards the block 22 of the furnace as represented by angle 92.
  • a burner tip housing assembly 38C and the interconnection of closure member 62C, ring shaped members 70B, each having an outer beveled surfaces 75, space members 72C and tubular base portion 73C via the connector members 74 enables one to selectively position the direction of flow through circumferential discharge ports 56C in a preselected angular direction away from the block 22 of the furnace as represented by angle 94. It should be noted, however, that in each instance, even in the angular disposition of the flow of the fuel and air mixture through the circumferential ports 56B and 56C of Figures 5 and 6, respectively, the gaseous dispersement of the gaseous fluid through circumferential discharge ports 56B and 56C is substantially normal to the longitudinal axis of the
  • the spacer members 72 of the burner tip housing assembly 38 can be fabricated as a unitary members of the ring shapp embers 70.
  • a ring shaped member 100 is provided with a plurality of stand off members 102 integrally formed as extensions from one side thereof.
  • An aperture extends through ' the wall of the ring shaped member 100 and each of the stand off members 102 so that the connector member 74 can e positioned therethrough for assembling the ring shaped member 100 with the closure member 62 and the tubular base portion 73.
  • the ring shaped members 100 are stacked onto each other and the stand off members 102 serve to separate adjacent ring shaped members 100 to form circumferential discharge ports 56D, therebetween, the opening size of which is determined by the length of the stand off members 102.
  • the spacer members 72 of the burner tip housing assembly 38 and the stand off members 102 of the ring shaped member 100 can be of any desirable shape or configuration. As shown in Figures 8A and 8B the spacer member 72 can be washer 104 having a thickness corresponding to the desired opening size of the circumferential discharge port 56. When employing a washer 104 as the spacer member 72, the flow of the fuel and gas mixture through the circumferential discharge port 56 around the washer 104 will be generally as represented by the arrows 106. It should be noted that when employing the washer 104 as the spacer member of the burner tip housing assembly 38, a shadow may be created downstream of each of the washers 104 during the burning of the fuel and air mixture because of the inability of the mixture to completely converge around the washer 104.
  • the shadow effect which may be created during the burning of the fuel and air mixture when employing the washer 104 as the spacer member can be substantially eliminated by constructing the spacer member as an aerodynamically shaped member 108 so that the flowing gaseous fluid is dispersed substantially uniformly around the periphery of the aerodyna ically shaped member 108 in the direction indicated by arrows 110.
  • the circumferential discharge ports 56 of the burner tip housing assembly 38 are formed by the interaction of adjacently disposed ring shaped members 70 and spacer ' members 72 (except for the uppermost circumferential discharge port 56 which is formed by the closure member 62; and the lowermost circumferential discharge port 56 which is formed by adjacently disposed ring shaped member 70 and the tubular base portion 73). However, in each instance the circumferential discharge ports 56 are formed to have a configuration corresponding to the shape of the ring shaped members 70.
  • the circumferential discharge port 56 is defined by the adjacently disposed side walls of two ring shaped members 70, each of the ring shaped members 70 having converging walls in the direction of the gaseous flow through the circumferential discharge port
  • the circumferential discharge port 56 is defined by the adjacently disposed side walls of two ring shaped members 70 such that the circumferential discharge port is characterized as first converging and then diverging in the direction of the gaseous flow therethrough.
  • the circumferential discharge port 56 illustrated in Figure 9C is formed between the adjacently disposed side walls of two ring shaped members 70 such that the side walls of the adjacently disposed ring shaped members 70 form a discharge port in which the gaseous flow therethrough is first converging and then straight.
  • the two adjacently disposed side walls of two ring shaped 70 cooperate to form the circumferential discharge port 56 such that the gaseous flow through the circumferential discharge port 56 is substantially parallel to the walls of the ring shaped members 70.
  • the unique design of the burner tip housing assembly 38 of the present invention including the interaction of the ring shaped members 70 and the spacer members 72 have unexpectantly provided desired characteristics to the radiant wall burner assembly 10 which have not heretofore been achievable by the prior art devices.
  • the aspect ratio of the flow passage (L/D) of the burner tip housing assembly 38 of the present invention is purposefully established to be large and this feature ' substantially minimizes the possibility of flashback into the burner assembly 10 during the burning of the fuel and air mixture exterior to the burner tip housing assembly 38.
  • the turndown capacities of the radiant wall burner assembly 10 can be substantially increased without the creation of flame propagation in the discharge ports and thus preventing flashback.
  • the radiant wall burner assembly 10 may be established to have an aspect ratio of the flow passage of 6.25 by constructing the ring shaped member 70 to have a thickness (L) of 0.5 inches and providing circumferential discharge ports 56 with an opening (D) of 0.08 inches.
  • the unique design of the burner tip housing assembly 38 provides a radiant wall burner assembly having a higher BTU rating and an improved coefficient of discharge.
  • a burner assembly capable of operating at least up to about 1.5 million BTUs per hour under 100% primary air pre ix conditions has been achieved.
  • the unique design, precision of dimensions and quality of surfaces provided by the ring shaped members 70 enable one to achieve a coefficient of discharge of about 0.95.
  • the improved radiant wall burner assembly of the present invention provides numerous advantages over the prior art burner assemblies and enables one to achieve performance not heretofore achieved.
  • a gaseous fuel is supplied to the tubular member 50 via pipe 28 and spud 30.
  • a low pressure zone is created so that primary air is drawn into the tubular member 50 and mixed with the fuel as the mixture passes through the tubular member 50.
  • the resulting fuel-air mixture is then discharged from the burner tip housing assembly 38 via the circumferential discharge ports 56 such that the gaseous fuel mixture is dispersed in a planar discharge substantially normal to the longitudinal axis 58 of the tubular member 50.
  • the fuel is then burned exterior the burner tip housing assembly 38 and the heat generated by the burning of the fuel provides a high temperature source of radiant heat which is dispersed over a large area of the wall 16 of the furnace.

Abstract

A radiant wall burner assembly (10) having a tubular member (50) and a gas discharge assembly (38) communicating with the tubular member for discharging a gaseous fluid therethrough. The gaseous discharge assembly includes at least one circumferential discharge port (56) for gaseous dispersement of the gaseous fluid in a planar discharge substantially normal to the longitudinal axis (58) of the tubular member (50).

Description

RADIAMT WALL BURNER Technical Field
Field of Invention
The present invention relates generally to the field of radiant wall burner assemblies, and more particularly but not by way of limitation, to a radiant wall burner ' assembly for discharging gaseous fuel over the face of a ceramic member to provide a high temperature source of radiant heat dispersed over a relatively large area of the face of the wall of a furnace to be fired. Background Art
It is known to provide radiant wall burners for discharge of a gaseous fuel from a plurality of discharge ports in directions which are parallel to the face of a refractory member to distribute the heat provided by the burning fuel over a substantial area of the ceramic member. Typically, the radiant wall burner assemblies of the prior art have constructed the discharge ports as a plurality of slots which extend substantially in the direction of the axis of the burner. An example of a prior art radiant wall burner is disclosed in U.S. Patent No. 3,182,712. However, such prior art radiant wall burner assemblies have encountered certain problems in that such burners do not achieve all of the desired performance characteristics sought by the industry, and such burners often are short lived and expensive to manufacture and replace.
Further, 'the prior art radiant wall burner assemblies have generally had a low coefficient of discharge and have been subject to flashbacks which result in deterioration of the burner assembly and create unsafe operating conditions. New and improved radiant wall burner systems have long been desired which have an improved BTU output, and which have improved coefficient of discharge and which overcome the limitations of the prior art burner assemblies. Disclosure of Invention
An object of the present invention is to provide a radiant wall burner assembly having an improved BTU output without suffering from the limitations of the prior art burner assemblies.
Another object of the present invention is to provide • an improved radiant wall burner assembly having an improved coefficient of discharge.
Another object of the present invention is to provide an improved radiant wall burner assembly which minimizes the possibility of flashback from the combustion zone into the burner assembly when the gaseous fuel contains appreciable quantities of rapidly reacting gaseous fuel mixtures. Another object of the present invention, while achieving the above stated objects, is to provide an improved radiant wall burner assembly which is easily installed and which is cost effective.
Other objects, features and advantages of the present invention will become apparent upon reading the following specification in conjunction with the accompanying drawings and appended claims.
According to the present invention an improved radiant wall burner assembly is provided comprising a tubular body member having an upstream portion and a downstream portion, the tubular body member being adapted to receive and mix fuel and air during passage therethrough; and, a burner tip housing assembly operably connected to the downstream portion of the tubular body member, the burner tip housing assembly having a plurality of circumferential discharge ports formed therein such that the fuel and air mixture discharged via the discharge ports is discharged in a plane substantially normal to the longitudinal axis of the tubular body member and the burner tip housing assembly. In a more specific aspect the improved radiant wall burner assembly of the present invention comprises a tubular member having an upstream
" end portion and a downstream end portion, at least one ring shaped member supported by the downstream end of the tubular member, a spacer assembly for maintaining the ring shaped members in predetermined spatial relationship to form the circumferential discharge ports, and a closure member positioned on and connected to the outmost ring shaped member for enclosing the downstream end portion of ' the tubular body member and directing the flow of gaseous fluid in the tubular member to exit via the circumferential discharge ports.
Brief Description of Drawings Figure 1 is an elevational view of a radiant wall burner assembly positioned within a ceramic member and illustrating a portion of the wall of a combustion chamber.
Figure 2 is a cross-section of the radiant wall burner assembly constructed in accordance with the present invention, the burner assembly being shown in relation to the furnace construction. Figure 3 is a fragmentary view of the burner tip housing assembly of Figure 2 wherein the gaseous discharge ports are disposed such that the mixture of fuel and air is dispersed in a planar discharge substantial normal to the longitudinal axis of the tubular body member and the burner tip housing assembly.
Figure 4 is a perspective view of another embodiment of a burner tip housing assembly constructed in accordance with the present invention.
Figure 5 is a fragmentary, partially cutaway view of another burner tip housing assembly constructed in accordance with the present invention wherein the of circumferential discharge ports are disposed such that the mixture of fuel and air is dispersed in a planar discharge substantially normal to the longitudinal axes of the tubular member and angled somewhat in the direction of the face of the furnace wall.
Figure 6 is a fragmentary, partially cutaway view of yet another burner tip housing assembly constructed in accordance with the present invention wherein the circumferential discharge ports are disposed such that the mixture of fuel and air is dispersed from the circumferential discharge ports in a planar discharge substantially normal to the longitudinal axis of the tubular body member and angled somewhat away from the face of the furnace.
Figure 7 is an elevational view of one embodiment of a ring shaped member having a stand off member extending therefrom for forming the circumferential discharge ports in the burner tip assembly of the present invention.
Figure 8A is an enlarged perspective view depicting a spacer element of the radiant wall burner assembly of the present invention, the spacer element being employed to maintain the ring shaped members of the burner tip housing assembly in a predetermined spatial relationship so as to form the circumferential discharge ports.
Figure 8B is a top plan view of the spacer member of Figure 8A depicting the flow of the gaseous fluid around same.
Figure 8C is an enlarged perspective view of another spacer member of the radiant wall burner assembly of the present invention, the spacer member having an aerodynamical shape so that the gaseous fluid flowing past same will be caused to be dispersed substantially uniformly around the periphery of the spacer member.
Figure 8D is a top plan view of the spacer member of Figure 8C illustrating the flow of the gaseous fluid substantially uniformly around the periphery of such member.
Figure 9A is an enlarged cross-sectional view of two adjacently disposed ring shaped members of the burner tip housing assembly of the present invention, the ring shaped members defining a circumferential discharge port having a converging flow path for passage of gaseous fluids therethrough.
Figure 9B is an enlarged cross-sectional view of two adjacently disposed ring shaped members of the burner tip housing assembly of the present invention, the ring shaped members defining a circum erential discharge port having a converging and diverging flow path for passage of gaseous fluids passing therethrough. Figure 9C is an enlarged cross-sectional view of two adjacently disposed ring shaped members of the burner tip housing assembly of the present invention, the ring shaped ' members defining a circumferential discharge port having a converging and straight flow path for passage of gaseous fluid therethrough.
Figure 9D is an enlarged cross-sectional view of two adjacently disposed ring shaped members of the burner tip housing assembly of the present invention, the ring shaped members defining a circumferential discharge port having a straight flow path for passage of gaseous fluid therethrough.
Best Mode for Carrying Out the Invention Referring to the drawings in general , and in particular to Figures 1 and 2, shown therein and designated by the numeral 10 is an improved radiant wall burner assembly inserted into a furnace area 12 through an opening 14 in a wall 16 of a furnace. Centering spacers (not shown) support the radiant wall burner assembly 10 in the wall 16 of the furnace. The furnace wall 16 is generally constructed of a steel outer wall 18, sometimes referred to as the outer surface of the furnace wall 16, and a thick lining of refractory or ceramic bricks 20. A block 22, through which the radiant wall burner assembly 10 is inserted, is generally formed "of a ceramic material. A plate 24, which supports the radiant wall burner assembly 10 by any suitable means, such as welding, is secured to the outer steel wall 18 by bolts 26. A temperature expansion material 26 is positioned between the refractory or ceramic bricks 20 and the block 22 to seal the joint formed therebetween.
A gaseous fuel enters the radiant wall burner assembly 10 through a pipe 28 and a spud 30. The gaseous fuel issues from the spud 30 at high velocity and creates
OMPI a low pressure zone so that primary air is drawn through an opening 32 as shown by the arrow 34. The opening 32, and thus the flow of primary air therethrough, is adjusted by moving a door 36 so that an optimum volume of combustion supporting air is provided in the radiant wall burner assembly 10. The fuel and air exit the burner assembly 10 via a burner tip housing assembly 38. An adjustable air door 40 permits a volume of secondary air to enter the opening 14 and to pass therethrough and around the burner tip housing assembly 38 and into the furnace area 12.
The above description of the interrelationship between the wall 16 of the furnace and the radiant wall burner assembly 10 is similar to the general construction of such elements in the prior art. Thus, the improvements of the present invention relate to the improved wall burner assembly 10, and more particularly to the burner tip housing assembly 38.
Referring now to Figures 2 and 3, the radiant wall burner assembly 10 has a tubular member 50 having an upstream end portion 52 and a downstream end portion 54, and the burner tip housing assembly 38 has a plurality of circumferential discharge ports 56 disposed therein for discharging the gaseous fluid flowing in the radiant wall burner assembly 10 in a planar discharge direction substantially normal to the longitudinal axis 58 of the tubular member 50. The tubular member 50 and the burner tip housing assembly 38 of the radiant wall burner assembly 10 can be constructed as an integral unit, but desirably will be constructed as two separate units such that the burner tip housing assembly 38 can be connected to the downstream end portion 54 of the tubular member 50 as shown in Figure 2. The tubular member 50 is desirably flared outwardly from its axis 58 in the direction from the upstream end portion 52 to the downstream end portion 54.
The burner tip housing assembly 38 is provided with a cyclindrical shaped body portion 60 having at least one of the circumferential discharge ports 56 formed therein, and a closure member 62. The closure member 62 closes off the downstream end portion 54 of the tubular member 50 and directs the flow of the gaseous fluid passing through the radiant wall burner assembly 10 to exit therefrom via the circumferential discharge ports 56, shown more fully in Figure 3, which will be described hereinbelow.
The circumferential discharge ports 56 of the burner tip housing assembly 50 can be formed in numerous ways, the only criteria being that the disposition of the circumferential discharge slots 56 be such that the dispersement of the gaseous fluid passing therethrough is in a planar discharge substantially normal to the longitudinal axis 56 of the tubular member 50. For example, as illustrated in Figure 4, circumferential discharge ports 56A are formed by cutting a plurality of staggered slots within a cylindrically shaped body portion 60A of a burner tip housing assembly 38A. However, in order to meet the specifications of the user of the radiant wall burner assembly 10, and to simplify its fabrication, the presently preferred method of constructing the burner tip housing assembly 38 is as shown in Figures 2 and 3.
The burner tip housing assembly 38, shown in partial fragmentary, cutaway view in Figure 3, functions as the gas discharge assembly of the radiant wall burner assembly 10, includes the closure member 62, a plurality of ring shaped members 70, a plurality of spacer members 72, a tubular base base portion 73, and a connector member 74 for interconnecting the closure member 62, the ring shaped members 70, the spacer members 72, and the tubular base portion 73 such that in an assembled position each of the elements cooperate to form the circumferential discharge ports 56 in the burner tip housing assembly 38. The closure member 62, which closes off the downstream end portion 54 of the tubular member 50 and serves to direct the flow of the gaseous fluids through the circumferential discharge ports 56, is provided with an inner surface 76 having a conically curved configuration substantially as shown. The conically curved configuration of the inner surface 76 assists in directing of the gas and fuel mixture from the radiant wall burner assembly 10 to the circumferential discharge ports 56 of the burner tip housing assembly 38.
The number of the ring shaped members 70 and spacer ' members 72 employed to define the circumferential discharge ports 56 can vary and will be dependent to a large degree upon the specifications of the radiant wall burner assembly 10. Each of the ring shaped members 70 is provided with a plurality of apertures extending therethrough for receiving the connecting members 74. Similarly, each of the spacer members 72 is provided with an aperture therein for passage of the connector members 74. The spacer members 72 will be more fully described hereinafter with reference to Figures 8A, 8B, 8C and 8D.
The connector member 72 can be any suitable connector, and as depicted in the drawings, is a bolt 78 having a headed end portion 80 and a connector end portion 82. The connector end portion 82 of the bolt 78 is secured to the tubular base portion 73 by any suitable means, such as threading engagement therewith. The tubular base portion 73 is provided with a first end 84 and an opposed second end 86. The second end 86 is provided with a plurality of threaded bores adapted to receive the connector end portion 82 of the bolt 78 substantially as shown in the drawings. The distil end burner tip housing assembly 38 is threaded, as is the outer surface of the downstream end 54 of the tubular member 50, and the burner tip housing assembly 38 is threadingly joined to the downstream end portion 54 of the tubular member 50.
The closure member 62 is preferably provided with a recessed portion 88 in its outer surface 90. The recessed portion 88 is adapted to receive the headed end portion 80 of the bolt 78 when the burner tip housing assembly 38 is in the assembled position. Thus, the headed end portion 80 of the bolt 78 will be flush with the outer surface 90 of the closure member 62 and can be secured in place by spotwelding if desired.
The unique design of the burner tip housing assembly 38, and the interconnection of the closure member 62, the ring shaped members 70, the spacer members 72, and the tubular base portion 73 enables one to selectively • position the direction of flow through the circumferential discharge ports 56 formed between the stacked ring shaped members 70. For example, the configuration of the ring shaped member 70 and the spacer member 72 is such that the flow of the fuel and gas mixture exiting the circumferential discharge ports 56 will be in a planar discharge substantially normal to the axis 58 of the tubular member 50. Alternatively, and as shown in Figure 5, a burner tip housing assembly 38B, and the interconnection of closure member 62B, ring shaped members 70B, each having an outer beveled surfaces 71, spacer members 72B and the tubular base portion 73B via the connector meπibers 74 enables one to selectively position the direction of flow through circu ferentially discharge ports 56B in a preselected angular direction towards the block 22 of the furnace as represented by angle 92. Further, and as shown in Figure 6, a burner tip housing assembly 38C, and the interconnection of closure member 62C, ring shaped members 70B, each having an outer beveled surfaces 75, space members 72C and tubular base portion 73C via the connector members 74 enables one to selectively position the direction of flow through circumferential discharge ports 56C in a preselected angular direction away from the block 22 of the furnace as represented by angle 94. It should be noted, however, that in each instance, even in the angular disposition of the flow of the fuel and air mixture through the circumferential ports 56B and 56C of Figures 5 and 6, respectively, the gaseous dispersement of the gaseous fluid through circumferential discharge ports 56B and 56C is substantially normal to the longitudinal axis of the
C\-:?I tubular member 50.
The spacer members 72 of the burner tip housing assembly 38 can be fabricated as a unitary members of the ring shapp embers 70. As illustrated in Figure 7, a ring shaped member 100 is provided with a plurality of stand off members 102 integrally formed as extensions from one side thereof. An aperture (not shown) extends through ' the wall of the ring shaped member 100 and each of the stand off members 102 so that the connector member 74 can e positioned therethrough for assembling the ring shaped member 100 with the closure member 62 and the tubular base portion 73. Thus, in the assembled position, the ring shaped members 100 are stacked onto each other and the stand off members 102 serve to separate adjacent ring shaped members 100 to form circumferential discharge ports 56D, therebetween, the opening size of which is determined by the length of the stand off members 102.
The spacer members 72 of the burner tip housing assembly 38 and the stand off members 102 of the ring shaped member 100 can be of any desirable shape or configuration. As shown in Figures 8A and 8B the spacer member 72 can be washer 104 having a thickness corresponding to the desired opening size of the circumferential discharge port 56. When employing a washer 104 as the spacer member 72, the flow of the fuel and gas mixture through the circumferential discharge port 56 around the washer 104 will be generally as represented by the arrows 106. It should be noted that when employing the washer 104 as the spacer member of the burner tip housing assembly 38, a shadow may be created downstream of each of the washers 104 during the burning of the fuel and air mixture because of the inability of the mixture to completely converge around the washer 104.
As more clearly shown in Figures 8C and 8D, the shadow effect which may be created during the burning of the fuel and air mixture when employing the washer 104 as the spacer member can be substantially eliminated by constructing the spacer member as an aerodynamically shaped member 108 so that the flowing gaseous fluid is dispersed substantially uniformly around the periphery of the aerodyna ically shaped member 108 in the direction indicated by arrows 110. The circumferential discharge ports 56 of the burner tip housing assembly 38 are formed by the interaction of adjacently disposed ring shaped members 70 and spacer ' members 72 (except for the uppermost circumferential discharge port 56 which is formed by the closure member 62; and the lowermost circumferential discharge port 56 which is formed by adjacently disposed ring shaped member 70 and the tubular base portion 73). However, in each instance the circumferential discharge ports 56 are formed to have a configuration corresponding to the shape of the ring shaped members 70.
As shown in Figure 9A, the circumferential discharge port 56 is defined by the adjacently disposed side walls of two ring shaped members 70, each of the ring shaped members 70 having converging walls in the direction of the gaseous flow through the circumferential discharge port
56. In Figure 9B the circumferential discharge port 56 is defined by the adjacently disposed side walls of two ring shaped members 70 such that the circumferential discharge port is characterized as first converging and then diverging in the direction of the gaseous flow therethrough. The circumferential discharge port 56 illustrated in Figure 9C is formed between the adjacently disposed side walls of two ring shaped members 70 such that the side walls of the adjacently disposed ring shaped members 70 form a discharge port in which the gaseous flow therethrough is first converging and then straight. In Figure 9D the two adjacently disposed side walls of two ring shaped 70 cooperate to form the circumferential discharge port 56 such that the gaseous flow through the circumferential discharge port 56 is substantially parallel to the walls of the ring shaped members 70.
The unique design of the burner tip housing assembly 38 of the present invention, including the interaction of the ring shaped members 70 and the spacer members 72 have unexpectantly provided desired characteristics to the radiant wall burner assembly 10 which have not heretofore been achievable by the prior art devices. For example, the aspect ratio of the flow passage (L/D) of the burner tip housing assembly 38 of the present invention is purposefully established to be large and this feature ' substantially minimizes the possibility of flashback into the burner assembly 10 during the burning of the fuel and air mixture exterior to the burner tip housing assembly 38. By providing a burner tip housing assembly 38 which has a large aspect ratio of the flow passage, the turndown capacities of the radiant wall burner assembly 10 can be substantially increased without the creation of flame propagation in the discharge ports and thus preventing flashback. For example, the radiant wall burner assembly 10 may be established to have an aspect ratio of the flow passage of 6.25 by constructing the ring shaped member 70 to have a thickness (L) of 0.5 inches and providing circumferential discharge ports 56 with an opening (D) of 0.08 inches.
Further, the unique design of the burner tip housing assembly 38 provides a radiant wall burner assembly having a higher BTU rating and an improved coefficient of discharge. By constructing the radiant wall burner assembly 10 as herein described a burner assembly capable of operating at least up to about 1.5 million BTUs per hour under 100% primary air pre ix conditions has been achieved. In addition, the unique design, precision of dimensions and quality of surfaces provided by the ring shaped members 70 enable one to achieve a coefficient of discharge of about 0.95. Thus, the improved radiant wall burner assembly of the present invention provides numerous advantages over the prior art burner assemblies and enables one to achieve performance not heretofore achieved.
The operation of the radiant wall burner assembly of the present invention will now be briefly described with reference to Figure 2 of the drawings. A gaseous fuel is supplied to the tubular member 50 via pipe 28 and spud 30. As the fuel exits the spud 30 a low pressure zone is created so that primary air is drawn into the tubular member 50 and mixed with the fuel as the mixture passes through the tubular member 50. The resulting fuel-air mixture is then discharged from the burner tip housing assembly 38 via the circumferential discharge ports 56 such that the gaseous fuel mixture is dispersed in a planar discharge substantially normal to the longitudinal axis 58 of the tubular member 50. The fuel is then burned exterior the burner tip housing assembly 38 and the heat generated by the burning of the fuel provides a high temperature source of radiant heat which is dispersed over a large area of the wall 16 of the furnace.
It is clear that the present invention is well adapted to carry out the objects and attain the ends and advantages mentioned as well as those inherit therein. While a preferred embodiment of the invention has been described for the purposes of this -disclosure, numerous changes may be made which will readily suggest themselves to those skilled in the art and which are encompassed within the spirit of the invention disclosed and as defined in the following claims.
O PI

Claims

Cl aims
1. A radiant wall burner assembly comprising: a tubular member having an upstream end portion and an opposed downstream end portion; and gas discharge means communicating with the tubular member for discharging a gaseous fluid therethrough, the gaseous discharge means comprising at least one circumferential discharge port disposed for gaseous dispersement of the gaseous fluid in a planar discharge substantially normal to the longitudinal axis of the tubular member.
2. The radiant wall burner assembly of claim 1 wherein the gas discharge means further comprises: closure means for closing off the down¬ stream end portion of the tubular member and directing the flow of the gaseous fluid in the tubular member to exit via the circumferential discharge port.
3. The radiant wall burner assembly of claim 1 wherein the cross sectional configuration of the gas discharge means is predetermined so that the discharge of the gaseous fluid via the gas discharge means is at a predetermined angular disposition relative to the longitudinal axis of the tubular member.
4. The radiant wall burner assembly of claim 2 wherein the gas discharge means further comprises: at least one ring shaped member supported by the downstream end of the tubular member; and spacer means for maintaining the ring shaped members in predetermined spatial
OMPI relationship to form the circumferential discharge ports; and wherein the closure means comprises: connector means for-interconnecting the ring shaped members.
5. The radiant wall burner assembly of claim 4 ' wherein each of the circumferential discharge ports is characterized as having walls converging in the direction of gaseous flow therethrough.
6. The radiant wall burner of claim 4 wherein each of the circumferential discharge ports is characterized as having walls converging and then diverging in the direction of gaseous flow therethrough.
7. The radiant wall burner of claim 4 wherein each of the gaseous discharge ports formed is characterized as having walls converging and then straight in the direction of gaseous flow therethrough.
8. The radiant wall burner of claim 4 wherein each of the circumferential discharge ports is characterized as having walls parallel to the direction of gaseous flow therethrough.
9. The radiant wall burner assembly of claim 4 wherein the tubular member is flared outwardly from its longitudinal axis in a direction extending from the upstream end portion to the downstream end portion.
10. The radiant wall burner assembly of claim 4 wherein the gas discharge means further comprises a base portion having a first end and an opposed second end, the first end being connectable to the downstream end portion of the tubular member, the opposed second end of the base portion adapted to receive the connector means for connecting the ring shaped members thereto.
- T-ΪE
O PI
<
11. The radiant wall burner assembly of claim 4 wherein the spacer means comprises aerodynamically shaped ring separation members shaped so that the flowing gaseous fluid is dispersed substantially uniformly around the periphery of the gas discharge means.
12. The radiant wall burner assembly of claims 10 or 11 wherein the spacer means comprises ring separation members integrally formed on each ring shaped member.
13. The radiant wall burner assembly of claim 10 wherein each of the ring shaped members and the spacer means of the gas discharge means are provided with apertures extending therethrough, the closure means is provided with a plurality of apertures extending therethrough, and the opposed second end of the base portion of the gas discharge means is provided with a plurality of threaded bores, and wherein the apertures in the ring shaped members, the spacer means, and the closure means are axially alignable with the threaded bores in the base portion so that the connector means is secured in connecting engagement thereby.
14. The radiant wall burner assembly of claim 13 wherein the connector means comprises a plurality of bolts, each bolt having a headed end portion and a threaded end portion such that in an assembled position the threaded end portion threadably engages the threads in the bores in the base portion of the gas discharge means.
15. The radiant wall burner assembly of claim 10 wherein the closure means comprises an end plate member.
16. The radiant wall burner assembly of claim 15 wherein the end plate member is provided with an inner surface having conically curved configuration which is disposed to direct the flow of the gaseous fluid to exit
O PI WIPO via the circumferential discharge ports.
17. A radiant wall burner assembly comprising: a tubular body member having an upstream portion and a downstream portion, the tubular body member being flared outwardly from its axis in the direction from the upstream portion and the downstream portion, the tubular body member being adapted to receive and mix fuel and air during passage therethrough; and a burner tip housing assembly operably connected to the downstream portion of the tubular body member, the burner tip housing assembly having a plurality of circumferential discharge ports formed therein, the discharge ports disposed such that the mixture of fuel and air is dispersed in a planar discharge substantially normal to the longitudinal axes of the tubular body member and the burner tip assembly.
18. The radiant wall burner assembly of claim 17 wherein the burner tip assembly comprises: a base portion having a first end and an opposed second end, the first end of the base portion being connectable to the upstream portion of the tubular body member; a plurality of ring shaped members adapted to be positioned and secured in a stacking and spaced apart relationship on the base portion such that the ring shaped members form the plurality of circumferential discharge ports therebetween; and a closure member positioned on and connected to the outermost ring shaped member for
( OMPI enclosing the downstream portion of the tubular body member with the base portion and plurality of ring shaped members.
19. The radiant wall burner assembly of claim 17 wherein the burner tip assembly further comprises a plurality of spacer members selectively positioned between each of the ring shaped members such that in an assembled position the edge portions of adjacently disposed ring shaped members define the circumferential discharge ports.
20. The radiant wall burner assembly of claim 19 wherein the spacer members have an aerodynamic configuration so that the spacer members' disposition in the discharge port effects interaction with the flowing mixture of fuel and air such that the mixture is dispersed substantially uniformly around the burner tip housing assembly.
21. The radiant wall burning assembly of claim 20 wherein the circumferential discharge ports each have an aspect ratio of flow passage therethrough sufficient to increase the turndown capacity of the assembly without creation of flame propagation in the discharge ports.
22. The radiant wall burning assembly of claim 20 wherein the aspect ratio of flow passageway through the circumferential discharge ports is about 6.25.
OMPI
PCT/US1983/001409 1982-09-16 1983-09-16 Radiant wall burner WO1984001205A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU20400/83A AU2040083A (en) 1982-09-16 1983-09-16 Radiant wall burner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US41907082A 1982-09-16 1982-09-16

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Publication Number Publication Date
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Application Number Title Priority Date Filing Date
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0479174A2 (en) * 1990-10-02 1992-04-08 R.B.L. Riello Bruciatori Legnago Spa Combustion head for gas burners
EP0950853A3 (en) * 1998-04-18 2000-02-23 Bray Technologies Plc Improvements relating to fuel/air pre-mixed burners
FR2839547A1 (en) * 2002-05-13 2003-11-14 Brandt Ind BURNER HEAD FOR A GAS COOKING APPLIANCE
CH694972A5 (en) * 2004-10-22 2005-10-14 Toby Ag Burner is for liquid fuel has fuel evaporated or atomized and then mixed with air prior to being fed to interior of cylindrical flame holder
US20140102440A1 (en) * 2012-10-16 2014-04-17 Honeywell International Inc. Aerodynamic radiant wall burner tip

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US2639705A (en) * 1947-10-25 1953-05-26 Protectoseal Co Flame arrester
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US2956622A (en) * 1958-05-07 1960-10-18 Gen Motors Corp Gas burner
US3035633A (en) * 1959-09-14 1962-05-22 Palko Andrew Oil burner
US3416735A (en) * 1967-04-18 1968-12-17 Zink Co John Burner assembly producing radiant heat
US3885907A (en) * 1970-10-06 1975-05-27 Columbia Gas Syst Infrared burner and apparatus for producing same
GB1420599A (en) * 1972-02-02 1976-01-07 Pye Ltd Apparatus for chemical analysis including a burner

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US959057A (en) * 1910-01-06 1910-05-24 Amandus Hanson Glass-heating apparatus.
US1584210A (en) * 1923-09-07 1926-05-11 Texas Co Burner
US1771623A (en) * 1929-02-16 1930-07-29 Day And Night Water Heater Com Gas-burner structure
US2621722A (en) * 1947-10-23 1952-12-16 Roper Corp Geo D Gas burner with vertically spaced outlet slots
US2639705A (en) * 1947-10-25 1953-05-26 Protectoseal Co Flame arrester
US2594914A (en) * 1949-02-12 1952-04-29 Grosskloss John Frederick Burner
US2658568A (en) * 1950-10-10 1953-11-10 Paul A Broady Pan type oil burner
US2667216A (en) * 1951-05-18 1954-01-26 Zink Radiant gas burner assembly
US2956622A (en) * 1958-05-07 1960-10-18 Gen Motors Corp Gas burner
US3035633A (en) * 1959-09-14 1962-05-22 Palko Andrew Oil burner
US3416735A (en) * 1967-04-18 1968-12-17 Zink Co John Burner assembly producing radiant heat
US3885907A (en) * 1970-10-06 1975-05-27 Columbia Gas Syst Infrared burner and apparatus for producing same
GB1420599A (en) * 1972-02-02 1976-01-07 Pye Ltd Apparatus for chemical analysis including a burner

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0479174A2 (en) * 1990-10-02 1992-04-08 R.B.L. Riello Bruciatori Legnago Spa Combustion head for gas burners
EP0479174A3 (en) * 1990-10-03 1992-09-23 R.B.L. Riello Bruciatori Legnago Spa Combustion head for gas burners
EP0950853A3 (en) * 1998-04-18 2000-02-23 Bray Technologies Plc Improvements relating to fuel/air pre-mixed burners
FR2839547A1 (en) * 2002-05-13 2003-11-14 Brandt Ind BURNER HEAD FOR A GAS COOKING APPLIANCE
EP1363072A1 (en) * 2002-05-13 2003-11-19 Brandt Industries Burner head for gas cooking apparatus
CH694972A5 (en) * 2004-10-22 2005-10-14 Toby Ag Burner is for liquid fuel has fuel evaporated or atomized and then mixed with air prior to being fed to interior of cylindrical flame holder
US20140102440A1 (en) * 2012-10-16 2014-04-17 Honeywell International Inc. Aerodynamic radiant wall burner tip
WO2014062503A1 (en) * 2012-10-16 2014-04-24 Honeywell International Inc. Improved aerodynamic radiant wall burner tip
US9194579B2 (en) * 2012-10-16 2015-11-24 Honeywell International, Inc. Aerodynamic radiant wall burner tip

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