[go: up one dir, main page]

US3223136A - Fluid fuel combustion apparatus - Google Patents

Fluid fuel combustion apparatus Download PDF

Info

Publication number
US3223136A
US3223136A US209528A US20952862A US3223136A US 3223136 A US3223136 A US 3223136A US 209528 A US209528 A US 209528A US 20952862 A US20952862 A US 20952862A US 3223136 A US3223136 A US 3223136A
Authority
US
United States
Prior art keywords
duct
sleeve
air
fuel
central aperture
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.)
Expired - Lifetime
Application number
US209528A
Inventor
Mutchler Paul Albert
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.)
NU WAY CORP
Original Assignee
NU WAY CORP
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 NU WAY CORP filed Critical NU WAY CORP
Priority to US209528A priority Critical patent/US3223136A/en
Application granted granted Critical
Publication of US3223136A publication Critical patent/US3223136A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details, e.g. burner cooling means, noise reduction means
    • F23D11/40—Mixing tubes or chambers; Burner heads
    • F23D11/406—Flame stabilising means, e.g. flame holders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D17/00—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel
    • F23D17/002—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel gaseous or liquid fuel

Definitions

  • Such apparatus is commonly used for space heating and water heating and other purposes and it is desirable to provide a nonpulsating flame in order that more efiicient combustion may be established and a more even transfer of heat provided to the surface or material which is being heated.
  • a nonpulsating flame also provides the advantge of a reduction in the noise emitted by the apparatus when in use.
  • the primary object of the present invention is to provide fluid fuel burning apparatus in which, in use, a stable, nonpulsating flame is established in a simple and eflective manner over a relatively wide range of firing rates.
  • Another object of the invention is to provide fluid fuel burning apparatus in which, in use, the flame is of generally symmetrical appearance and of shorter length than flames formed in hitherto known burners of similar capacity operating under similar conditions.
  • a further object is to provide fluid fuel burning apparatus which is capable of being operated at a relatively high thermal eificiency without the emission of an objectionable amount of smoke either under forced draught or natural draught conditions.
  • Yet a further object is to provide fluid fuel burning apparatus which is relatively quiet in operation.
  • FIGURE 1 is a longitudinal section of one example of fluid fuel burning apparatus constructed in accordance with the invention
  • FIGURE 2 is an end view of the apparatus shown in FIGURE 1, and
  • FIGURES 3 and 4 are further views, similar to FIG- URES 1 and 2 but showing an alternative embodiment in accordance with the invention.
  • a duct which may be constructed as a cylindrical tube or tube of other cross-section of steel or other suitable material such as, for example, brickwork.
  • the duct is adapted to be connected at one end to a source of combustion air which may be pressurized by a compressor if desired.
  • baffle member 11 Adjacent to the opposite end of said duct 10 is a baffle member 11 of circular configuration, with said member having a centrally disposed aperture 12.
  • the baflle member 11 is coaxially mounted in said duct 10 so as to provide a gap 13 of constant width between the outer periphery of the member and the adjacent surface of the duct.
  • a sleeve 14 which is disposed within the duct 10 on the upstream side of the baflle member 11 so as to be coaxial therewith, the forward or leading end of said sleeve 14 being connected to the adjacent face (namely the upstream face) of the baflle member.
  • the diameter of said sleeve 14 is somewhat less than that of the member 11 so that the outer periphery of the latter projects laterally beyond the sleeve as may be seen from FIGURE 1.
  • the apparatus is also provided with a hollow nozzlemounting assembly 15 arranged coaxially of the sleeve and having a base portion 16 through which extends a fuel pipe 17 connected at one end to at least one nozzle 18.
  • An electrode 19 also extends through the base portion 16 for use in igniting fuel issuing from the nozzle 18'.
  • the fuel pipe 17 may be connected in use to a supply of gaseous or liquid fuel while the electrode 19 would of course be connected to a suitable source of electric potential.
  • the nozzle mounting assembly 15 is also provided with a plurality of apertures 20 through which can pass air for cooling the nozzle 18.
  • the duct 10 is formed so that adjacent to said baffle member 11 on the downstream side thereof the duct is straight or of nondivergent configuration in a forward direction for at least a distance substantially equal to the width of said gap 13.
  • the duct 10 is of cylindrical configuration throughout its length.
  • said member 11 is provided on its downstream face as shown in the drawings with a facing of heat-insulating material 21, with said material being of annular form and being chamfered on its inner and outer peripheries so as to be of forwardly tapered configuration in cross section.
  • the heat insulating material may be provided on the upstream side of said member 11 but in either event it will assist in reducing the deposition of carbon on said member.
  • the aforesaid sleeve 14 and nozzle mounting assembly 15 may be conveniently mounted within the duct 10 by means of members 22.
  • air admitted to the upstream end of said duct 10 (i.e. the left hand end of said duct as seen in FIGURE 1) will be divided by the sleeve 14 into two streams, namely one stream passing between the exterior of said sleeve 14 and the interior of the duct 10 and another stream passing between the interior of the sleeve 14 and the exterior of the nozzle mounting assembly 15.
  • the first mentioned stream flows Without rotation or swirling until it meets the obstruction offered by the outer edge portion of the member 11 adjacent to the gap 13 and due to this obstruction the air pressure at this position will temporarily increase.
  • this obstruction expansion will take'place and since the duct on the downstream side of said member 11 is straight or of nondivergent configuration the expansion will be directed inwardly as indicated by the arrows in FIGURE 1.
  • the duct 10, baffie member 11, and the aperture 12 are provided as in FIGURES 1 and 2 but in this embodiment the sleeve 14 is dispensed with and the bafiie member 11 is secured to the forward end of the nozzle-mounting assembly 15 by means of spaced struts 23 projecting forwardly from the forward end of said assembly 15 so as to leave a space between said end and the upstream side of the member 11.
  • At least one nozzle 18, an electrode 19 and apertures 20 for nozzlecooling air are provided as before, and member 11 has a facing of heat-insulating material 21 while members 3 22 connect the nozzle-mounting assembly 15 to the duct 10.
  • the apparatus is provided with a hollow ring 24 disposed on the exterior of the duct 10 and :having a series of apertures 25.
  • the ring 24 is adapted to be connected to a supply of gaseous fuel so that the apparatus can be used as a mixed burner when gas is admitted via the apertures 25 to be mixed with combustion air while liquid fuel is admitted through the nozzle or nozzles 18, burning of both the gas and the liquid fuel taking place on the downstream side of the baflie member ll as previously described.
  • the apparatus can be used to burn gaseous fuel only, or liquid fuel only.
  • the apparatus above described in either of the above embodiments produces a symmetrical flame coaxial with the duct 10 and of luminous form having a greater brilliance than is achieved by conventional burners operating at like inputs and C readings in the products of combustion. Furthermore this fixed and immovable flame front is not dependent upon any whirling or rotating air streams but relies on the low pressure region created on the downstream side of the member 11 allied to the anchoring effect produced by the air flow as mentioned above. This unique method of establishing a fixed and stable flame makes it impossible for any appreciable amount of combustion air to enter the firing region without being brought into intimate contact with the fuel being consumed.
  • Some air flowing through the aperture 12 breaks through the fuel spray but is immediately returned to intimate contact with the fuel owing to the low pressure of the Zone in which the flame is located thereby trapping the fuel between two converging air streams and resulting in a favourable situation for efiicient combustion.
  • apparatus has been operated in a heat release range of 150,000-250,000 B.t.u. per cubic foot of combustion chamber or furnace volume per hour, firing against a furnace back pressure of approximately 0.1" water column with an air supply source pressure of approximately 0.8"1.25" water column available in the duct 10. With additional pressure in the duct 10, however, there is no reason why the abovementioned heat release rates should not be exceeded.
  • apparatus according to the present invention possesses a performance vastly superior to anything hitherto known in conventional apparatus of a similar kind.
  • apparatus in accordance with the invention has been frequently operated with -13l4% CO in the products of combustion and test results have been recorded in excess of 14% CO with no trace of smoke on a Bach-arach smoke tester pad when burning a No. 2 fuel oil having an A.P.I. gravity of approximately 36 and a gross heating value of 140,000 B.t.u. per US. gallon with an ultimate CO of approximately 15.4%.
  • One particular test was conducted in the gph firing range where 14.7% CO in the products of combustion was recorded with a No.
  • Apparatus for burning fluid fuel to provide a stable, nonpulsating flame of relatively short length comprising a duct having inlet and outlet ends with said inlet end being adapted to be connected to a source of combustion air, a sleeve mounted within and spaced from said duct and having a thermal end located upstream of said outlet end for providing a flow path for combustion air between the sleeve and the duct, a bafiie member carried by said terminal end of the sleeve arranged transversely with respect to said sleeve, said baffle member having a central aperture therein and a peripheral edge projecting into the air flow path between the sleeve and the duct with such peripheral edge providing a continuous gap of constant width between the bafile member and the opposed surface of the duct, at least one fuel nozzle mounted within said sleeve for directing fluid fuel through said central aperture to the downstream side of said bathe member, means for directing air upstream of said batfle member for passage through said central aperture, and the
  • Apparatus for burning fluid fuel comprising a duct having inlet and outlet ends with said inlet end being adapted to be connected to a source of combustion air, a sleeve within and spaced from said duct and having a terminal end located upstream of said outlet end thereby providing a flow path for combustion air between the sleeve and the duct, a baflle member carried by said terminal end of the sleeve arranged transversely with respect to said sleeve, said baflie member having a central aperture therein and a peripheral edge projecting into the air flow path between the sleeve and the duct with such peripheral edge providing a continuous gap of constant width between the bathe member and the opposed surface of the duct, a hollow nozzle assembly located within and spaced inwardly of said sleeve, said assembly having a forward end spaced from the upstream side of the baflie member, the space between said assembly and the opposed surface of said sleeve providing a second air flow path, at
  • Apparatus for burning fluid fuel to provide a stable, nonpulsating flame of relatively short length comprising a duct having inlet and outlet ends with said inlet end being adapted to be connected to a source of combustion air, a hollow nozzle-mounting assembly disposed within and spaced from said duct and having a terminal end located upstream of said outlet end for providing a flow path for combustion air between the assembly and the duct, a bafile member means within the duct arranged transversely with respect to said mounting assembly, means for supporting said baffie member means in spaced relation to the terminal end of said assembly, said baffle member means having a central aperture therein and a peripheral edge projecting into the air flow path between the mounting assembly and the duct with such peripheral edge providing a continuous gap of constant width between the battle member means and the opposed surface of the duct, at least one fuel nozzle supported within said assembly for directing fluid fuel through said central aperture to the downstream side of said baffle member means, and the outlet end of said duct being straight and extending beyond said baffle mem
  • said duct is provided with a plurality of apertures located upstream of the terminal end of said mounting assembly, and a hollow component adapted to be connected to a source of gaseous fuel embracing said duct and having a plurality of openings registering with said apertures in the duct.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)

Description

Dec. 14, 1965 P. MUTCHLER I 3,223,136
' FLUID FUEL COMBUSTION APPARATUS Filed July 13, 1962 5 Sheets-Sheet 1 Dec. 14, 1965 p, MUTQHLER 3,223,136
FLUID FUEL COMBUSTION APPARATUS Filed July 13, 1962 3 Sheets-Sheet 2 Dec. 14, 1965 P. A. MUTCHLER 3,223,136
FLUID FUEL COMBUSTION APPARATUS Filed July 13, 1962 I 3 Sheets-Sheet 5 United States Patent Ofiice 3,223,136 Patented Dec. 14, 1965 3,223,136 FLUID FUEL COMBUSTION APPARATUS Paul Albert Mutchler, Rock Island, 111., assignor to The Nu-Way Corporation, Rock Island, Ill. Filed July 13, 1962, Ser. No. 209,528 8 Claims. (Cl. 15811) This invention relates to apparatus for burning fluid fuels. Such apparatus is commonly used for space heating and water heating and other purposes and it is desirable to provide a nonpulsating flame in order that more efiicient combustion may be established and a more even transfer of heat provided to the surface or material which is being heated. A nonpulsating flame also provides the advantge of a reduction in the noise emitted by the apparatus when in use.
The primary object of the present invention is to provide fluid fuel burning apparatus in which, in use, a stable, nonpulsating flame is established in a simple and eflective manner over a relatively wide range of firing rates.
Another object of the invention is to provide fluid fuel burning apparatus in which, in use, the flame is of generally symmetrical appearance and of shorter length than flames formed in hitherto known burners of similar capacity operating under similar conditions.
A further object is to provide fluid fuel burning apparatus which is capable of being operated at a relatively high thermal eificiency without the emission of an objectionable amount of smoke either under forced draught or natural draught conditions.
Yet a further object is to provide fluid fuel burning apparatus which is relatively quiet in operation.
Other objects of the invention will become apparent from the following description and accompanying drawing in which FIGURE 1 is a longitudinal section of one example of fluid fuel burning apparatus constructed in accordance with the invention,
FIGURE 2 is an end view of the apparatus shown in FIGURE 1, and
FIGURES 3 and 4 are further views, similar to FIG- URES 1 and 2 but showing an alternative embodiment in accordance with the invention.
In the example shown in FIGURES 1 and 2 there is provided a duct which may be constructed as a cylindrical tube or tube of other cross-section of steel or other suitable material such as, for example, brickwork. The duct is adapted to be connected at one end to a source of combustion air which may be pressurized by a compressor if desired.
Adjacent to the opposite end of said duct 10 is a baffle member 11 of circular configuration, with said member having a centrally disposed aperture 12. The baflle member 11 is coaxially mounted in said duct 10 so as to provide a gap 13 of constant width between the outer periphery of the member and the adjacent surface of the duct.
There is also provided a sleeve 14 which is disposed within the duct 10 on the upstream side of the baflle member 11 so as to be coaxial therewith, the forward or leading end of said sleeve 14 being connected to the adjacent face (namely the upstream face) of the baflle member. The diameter of said sleeve 14 is somewhat less than that of the member 11 so that the outer periphery of the latter projects laterally beyond the sleeve as may be seen from FIGURE 1.
The apparatus is also provided with a hollow nozzlemounting assembly 15 arranged coaxially of the sleeve and having a base portion 16 through which extends a fuel pipe 17 connected at one end to at least one nozzle 18. An electrode 19 also extends through the base portion 16 for use in igniting fuel issuing from the nozzle 18'. The fuel pipe 17 may be connected in use to a supply of gaseous or liquid fuel while the electrode 19 would of course be connected to a suitable source of electric potential. The nozzle mounting assembly 15 is also provided with a plurality of apertures 20 through which can pass air for cooling the nozzle 18.
The duct 10 is formed so that adjacent to said baffle member 11 on the downstream side thereof the duct is straight or of nondivergent configuration in a forward direction for at least a distance substantially equal to the width of said gap 13. In the example shown the duct 10 is of cylindrical configuration throughout its length. Furthermore, said member 11 is provided on its downstream face as shown in the drawings with a facing of heat-insulating material 21, with said material being of annular form and being chamfered on its inner and outer peripheries so as to be of forwardly tapered configuration in cross section. In an alternative arrangement, the heat insulating material may be provided on the upstream side of said member 11 but in either event it will assist in reducing the deposition of carbon on said member.
The aforesaid sleeve 14 and nozzle mounting assembly 15 may be conveniently mounted within the duct 10 by means of members 22.
In use air admitted to the upstream end of said duct 10 (i.e. the left hand end of said duct as seen in FIGURE 1) will be divided by the sleeve 14 into two streams, namely one stream passing between the exterior of said sleeve 14 and the interior of the duct 10 and another stream passing between the interior of the sleeve 14 and the exterior of the nozzle mounting assembly 15. The first mentioned stream flows Without rotation or swirling until it meets the obstruction offered by the outer edge portion of the member 11 adjacent to the gap 13 and due to this obstruction the air pressure at this position will temporarily increase. Immediately after passing this obstruction expansion will take'place and since the duct on the downstream side of said member 11 is straight or of nondivergent configuration the expansion will be directed inwardly as indicated by the arrows in FIGURE 1.
The other stream of combustion air, namely that air passing between the sleeve 14 and the nozzle mounting assembly 15, will flow around the end of said assembly and through the aperture 12 in the member 11. At the same time fuel issuing from the nozzle 18 will. pass through the aperture 12 and owing to the low pressure region on the downstream side of the member 11 (caused by the obstruction offered by said member), said fuel will be directed to said low pressure region and will be held there by the air flowing inwardly from the outer regions of the duct and the air flowing through the aperture 12. A relatively short annular flame will thus be established and it is found that the flame is extremely stable under a wide range of firing rates since it is held as above described by the stream of air. In other words the flame is securely anchored on the downstream side of said bafile member 11 and no pulsation occurs.
In the alternative embodiment illustrated in FIG- URES 3 and 4, the duct 10, baffie member 11, and the aperture 12, are provided as in FIGURES 1 and 2 but in this embodiment the sleeve 14 is dispensed with and the bafiie member 11 is secured to the forward end of the nozzle-mounting assembly 15 by means of spaced struts 23 projecting forwardly from the forward end of said assembly 15 so as to leave a space between said end and the upstream side of the member 11. At least one nozzle 18, an electrode 19 and apertures 20 for nozzlecooling air are provided as before, and member 11 has a facing of heat-insulating material 21 while members 3 22 connect the nozzle-mounting assembly 15 to the duct 10.
Moreover, the apparatus is provided with a hollow ring 24 disposed on the exterior of the duct 10 and :having a series of apertures 25. The ring 24 is adapted to be connected to a supply of gaseous fuel so that the apparatus can be used as a mixed burner when gas is admitted via the apertures 25 to be mixed with combustion air while liquid fuel is admitted through the nozzle or nozzles 18, burning of both the gas and the liquid fuel taking place on the downstream side of the baflie member ll as previously described. Alternatively, the apparatus can be used to burn gaseous fuel only, or liquid fuel only.
The apparatus above described in either of the above embodiments produces a symmetrical flame coaxial with the duct 10 and of luminous form having a greater brilliance than is achieved by conventional burners operating at like inputs and C readings in the products of combustion. Furthermore this fixed and immovable flame front is not dependent upon any whirling or rotating air streams but relies on the low pressure region created on the downstream side of the member 11 allied to the anchoring effect produced by the air flow as mentioned above. This unique method of establishing a fixed and stable flame makes it impossible for any appreciable amount of combustion air to enter the firing region without being brought into intimate contact with the fuel being consumed. Some air flowing through the aperture 12 breaks through the fuel spray but is immediately returned to intimate contact with the fuel owing to the low pressure of the Zone in which the flame is located thereby trapping the fuel between two converging air streams and resulting in a favourable situation for efiicient combustion.
As an indication of the very superior results obtainable with apparatus according to the present invention it may be mentioned that the apparatus has been operated in a heat release range of 150,000-250,000 B.t.u. per cubic foot of combustion chamber or furnace volume per hour, firing against a furnace back pressure of approximately 0.1" water column with an air supply source pressure of approximately 0.8"1.25" water column available in the duct 10. With additional pressure in the duct 10, however, there is no reason why the abovementioned heat release rates should not be exceeded.
Furthermore, so far as liquid fuels are concerned, apparatus according to the present invention possesses a performance vastly superior to anything hitherto known in conventional apparatus of a similar kind. Thus, apparatus in accordance with the invention has been frequently operated with -13l4% CO in the products of combustion and test results have been recorded in excess of 14% CO with no trace of smoke on a Bach-arach smoke tester pad when burning a No. 2 fuel oil having an A.P.I. gravity of approximately 36 and a gross heating value of 140,000 B.t.u. per US. gallon with an ultimate CO of approximately 15.4%. One particular test was conducted in the gph firing range where 14.7% CO in the products of combustion was recorded with a No. 1 'Bacharach smoke pad reading; at 15% CO the smoke pad reading was a No. 2. All tests were conducted utilising Hays or 'Fisher orsats, and in the data recorded the excess oxygen in the products of combustion substantiated the CO readings.
Having thus described my invention what I claim as new and desire to secure by Letters Patent is:
1. Apparatus for burning fluid fuel to provide a stable, nonpulsating flame of relatively short length comprising a duct having inlet and outlet ends with said inlet end being adapted to be connected to a source of combustion air, a sleeve mounted within and spaced from said duct and having a thermal end located upstream of said outlet end for providing a flow path for combustion air between the sleeve and the duct, a bafiie member carried by said terminal end of the sleeve arranged transversely with respect to said sleeve, said baffle member having a central aperture therein and a peripheral edge projecting into the air flow path between the sleeve and the duct with such peripheral edge providing a continuous gap of constant width between the bafile member and the opposed surface of the duct, at least one fuel nozzle mounted within said sleeve for directing fluid fuel through said central aperture to the downstream side of said bathe member, means for directing air upstream of said batfle member for passage through said central aperture, and the outlet end of said duct being straight and extending beyond said 'baflle member a distance substantially equal to the width of said gap whereby the air pressure between the sleeve and duct will temporarily increase due to the projecting peripheral edge and after passing such edge will expand and be directed inwardly with the air flow and fuel passing through the central aperture and due to the low pressure area on the downstream side of the baflie member, the fuel will be directed to the low pressure area and maintained in such area by the inwardly flowing air and the air passing through the central aperture.
2. The apparatus as claimed in claim 1, in which said duct and sleeve are of cylindrical configuration.
3. The apparatus as claimed in claim 2, in which a facing of heat-insulating material is provided on the downstream side of said baflie member, said facing being of annular form and being chamfered on its inner and outer peripheries for providing a forward-1y tapering crosssection.
4. Apparatus for burning fluid fuel comprising a duct having inlet and outlet ends with said inlet end being adapted to be connected to a source of combustion air, a sleeve within and spaced from said duct and having a terminal end located upstream of said outlet end thereby providing a flow path for combustion air between the sleeve and the duct, a baflle member carried by said terminal end of the sleeve arranged transversely with respect to said sleeve, said baflie member having a central aperture therein and a peripheral edge projecting into the air flow path between the sleeve and the duct with such peripheral edge providing a continuous gap of constant width between the bathe member and the opposed surface of the duct, a hollow nozzle assembly located within and spaced inwardly of said sleeve, said assembly having a forward end spaced from the upstream side of the baflie member, the space between said assembly and the opposed surface of said sleeve providing a second air flow path, at least one nozzle mounted within said assembly for directing fluid fuel through said central aperture to the downstream side of said baflle member, and the outlet end of said duct being straight and extending beyond said baflie member a distance substantially equal to the width of said gap whereby the air pressure between the sleeve and duct will increase due to the projecting peripheral edge and after passing such edge be directed inwardly with the air in said second path entering the space between the forward end of the assembly and the upstream side of the baflle and passing through the central aperture together with the fluid fuel and due to the low pressure area on the downstream side of the battle member the fuel will be directed to the low pressure area and maintained in such area by the inwardly flowing air and the air passing through the central aperture.
5. The apparatus as claimed in claim 4 wherein said nozzle-mounting assembly is provided with apertures for the admission of nozzle-cooling air.
6. Apparatus for burning fluid fuel to provide a stable, nonpulsating flame of relatively short length comprising a duct having inlet and outlet ends with said inlet end being adapted to be connected to a source of combustion air, a hollow nozzle-mounting assembly disposed within and spaced from said duct and having a terminal end located upstream of said outlet end for providing a flow path for combustion air between the assembly and the duct, a bafile member means within the duct arranged transversely with respect to said mounting assembly, means for supporting said baffie member means in spaced relation to the terminal end of said assembly, said baffle member means having a central aperture therein and a peripheral edge projecting into the air flow path between the mounting assembly and the duct with such peripheral edge providing a continuous gap of constant width between the battle member means and the opposed surface of the duct, at least one fuel nozzle supported within said assembly for directing fluid fuel through said central aperture to the downstream side of said baffle member means, and the outlet end of said duct being straight and extending beyond said baffle mem ber means a distance substantially equal to the width of said gap whereby the air pressure between the mounting assembly and the duct will temporarily increase due to the projecting peripheral edge and after passing such edge will expand and be directed inwardly with the air impinging on the upstream side of the projecting edge being directed into the space between the terminal end and the baffle member means and through said central aperture together with the fuel and due to the low pressure area on the downstream side of the baflle member means, the fuel will be directed to the low pressure area and maintained in such area by the inwardly flowing air and the air passing through the central aperture.
7. The apparatus as claimed in claim 6 wherein said 6 duct is provided with a plurality of apertures located upstream of the terminal end of said mounting assembly adapted to be connected to a source of gaseous fuel.
8. The apparatus as claimed in claim 6 wherein said duct is provided with a plurality of apertures located upstream of the terminal end of said mounting assembly, and a hollow component adapted to be connected to a source of gaseous fuel embracing said duct and having a plurality of openings registering with said apertures in the duct.
References Cited by the Examiner UNITED STATES PATENTS 1,986,796 1/1935 De Florez 158-11 2,219,696 10/1940 Mueller et a1 1587-6 2,292,664 8/1942 Schwartz 15876 2,360,548 10/1944 Conway 158117.5 2,398,611 4/1946 Beggs 15811O X 2,458,542 1/1949 Urquhart 15811 2,676,649 4/1954 Diehl et a1 15876 X 2,862,545 12/1958 Snow et al. 15811 FOREIGN PATENTS 99,377 2/1962 Norway.
FREDERICK L. MATTESON, JR., Primary Examiner.
PERCY L. PATRICK, MEYER PERLIN, JAMES W.
WESTHAVER, Examiners.

Claims (1)

1. APPARATUS FOR BURNING FLUID FUEL TO PROVIDE A STABLE, MONPULSATING FLAME OF RELATIVELY SHORT LENGTH COMPRISING A DUCT HAVING INLET AND OUTLET ENDS WITH SAID INLET END BEING ADAPTED TO BE CONNECTED TO A SOURCE OF COMBUSTION AIR, A SLEEVE MOUNTED WITHIN AND SPACED FROM SAID DUCT AND HAVING A THERMAL END LOCATED UPSTREAM OF SAID OUTLET END FOR PROVIDING A FLOW PATH FOR COMBUSTION AIR BETWEEN THE SLEEVE AND THE DUCT, A BAFFLE MEMBER CARRIED BY SAID TERMINAL END OF THE SLEEVE ARRANGED TRANSVERSELY WITH RESPECT TO SAID SLEEVE, SAID BAFFLE MEMBER HAVING A CENTRAL APERTURE THEREIN AND A PERIPHERAL EDGE PROJECTING INTO THE AIR FLOW PATH BETWEEN THE SLEEVE AND THE DUCT WITH SUCH PERIPHERAL EDGE PROVIDING A CONTINUOUS GAP OF CONSTANT WIDTH BETWEEN THE BAFFLE MEMBER AND THE OPPOSED SURFACE OF THE DUCT, AT LEAST ONE FUEL NOZZLE MOUNTED WITHIN SAID SLEEVE FOR DIRECTING FLUID FUEL THROUGH SAID CENTRAL APERTURE TO THE DOWNSTREAM OF SAID BAFFLE, MEMBER, MEANS FOR DIRECTING AIR UPSTREAM OF SAID BAFFLE MEMBER FOR PASSAGE THROUGH SAID CENTRAL APERTURE, AND THE OUTLET END OF SAID DUCT BEING STRAIGHT AND EXTENDING BEYOND SAID BAFFLE MEMBER A DISTANCE SUBSTANTIALLY EQUAL TO THE WIDTH OF SAID GAP WHEREBY THE AIR PRESSURE BETWEEN THE SLEEVE AND DUCT WILL TEMPORARILY INCREASE DUE TO THE PROJECTING PERIPHERAL EDGE AND AFTER PASSING SUCH EDGE WILL EXPAND AND BE DIRECTED INWARDLY WITH THE AIR FLOW AND FUEL PASSSIG THROUGH THE CENTRAL APERTURE AND DUE TO THE LOW PRESSURE AREA ON THE DOWNSTREAM SIDE OF THE BAFFLE MEMBER, THE FUEL WILL BE DIRECTED TO THE LOW PRESSURE AREA AND MAINTAINED IN SUCH AREA BY THE INWARDLY FLOWING AIR AND THE AIR PASSING THROUGH THE CENTRAL APERTURE.
US209528A 1962-07-13 1962-07-13 Fluid fuel combustion apparatus Expired - Lifetime US3223136A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US209528A US3223136A (en) 1962-07-13 1962-07-13 Fluid fuel combustion apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US209528A US3223136A (en) 1962-07-13 1962-07-13 Fluid fuel combustion apparatus

Publications (1)

Publication Number Publication Date
US3223136A true US3223136A (en) 1965-12-14

Family

ID=22779106

Family Applications (1)

Application Number Title Priority Date Filing Date
US209528A Expired - Lifetime US3223136A (en) 1962-07-13 1962-07-13 Fluid fuel combustion apparatus

Country Status (1)

Country Link
US (1) US3223136A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3429300A (en) * 1967-04-12 1969-02-25 Carl H Eisentrout Industrial furnace burner
US3849058A (en) * 1972-02-24 1974-11-19 Gewerk Schalker Eisenhuette Gas burner for coke oven exhaust gas
US4140477A (en) * 1976-10-28 1979-02-20 Envirotech Corporation Steam atomizing burner
US4285664A (en) * 1979-04-02 1981-08-25 Voorheis James T Burner for a plurality of fluid streams
EP0151214A2 (en) * 1983-12-22 1985-08-14 Deutsche Babcock Werke Aktiengesellschaft Burner for liquid fuels of the vaporizing type
US4547147A (en) * 1983-06-30 1985-10-15 Mitsubishi Denki Kabushiki Kaisha Combustion device for a car
US6161506A (en) * 1999-09-15 2000-12-19 Harsco Corporation, Patterson-Kelley Division Pulsed air combustion high capacity boiler
US20090291401A1 (en) * 2006-08-11 2009-11-26 Mitsubishi Heavy Industries, Ltd. Burner

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1986796A (en) * 1933-02-07 1935-01-08 Florez Luis De Burner
US2219696A (en) * 1937-12-27 1940-10-29 Borg Warner Art of combustion
US2292664A (en) * 1940-03-21 1942-08-11 Joseph P Schwartz Oil burner
US2360548A (en) * 1944-10-17 Combustion method
US2398611A (en) * 1946-04-16 Igniting means for burners
US2458542A (en) * 1944-11-16 1949-01-11 Comb Processes Company Low velocity oil and gas burner
US2676649A (en) * 1952-06-11 1954-04-27 Gen Motors Corp Turbulator
US2862545A (en) * 1954-03-29 1958-12-02 United Carbon Company Inc Injector

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2360548A (en) * 1944-10-17 Combustion method
US2398611A (en) * 1946-04-16 Igniting means for burners
US1986796A (en) * 1933-02-07 1935-01-08 Florez Luis De Burner
US2219696A (en) * 1937-12-27 1940-10-29 Borg Warner Art of combustion
US2292664A (en) * 1940-03-21 1942-08-11 Joseph P Schwartz Oil burner
US2458542A (en) * 1944-11-16 1949-01-11 Comb Processes Company Low velocity oil and gas burner
US2676649A (en) * 1952-06-11 1954-04-27 Gen Motors Corp Turbulator
US2862545A (en) * 1954-03-29 1958-12-02 United Carbon Company Inc Injector

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3429300A (en) * 1967-04-12 1969-02-25 Carl H Eisentrout Industrial furnace burner
US3849058A (en) * 1972-02-24 1974-11-19 Gewerk Schalker Eisenhuette Gas burner for coke oven exhaust gas
US4140477A (en) * 1976-10-28 1979-02-20 Envirotech Corporation Steam atomizing burner
US4285664A (en) * 1979-04-02 1981-08-25 Voorheis James T Burner for a plurality of fluid streams
US4547147A (en) * 1983-06-30 1985-10-15 Mitsubishi Denki Kabushiki Kaisha Combustion device for a car
EP0151214A2 (en) * 1983-12-22 1985-08-14 Deutsche Babcock Werke Aktiengesellschaft Burner for liquid fuels of the vaporizing type
EP0151214A3 (en) * 1983-12-22 1986-02-05 Deutsche Babcock Werke Aktiengesellschaft Burner for liquid fuels of the vaporizing type
US6161506A (en) * 1999-09-15 2000-12-19 Harsco Corporation, Patterson-Kelley Division Pulsed air combustion high capacity boiler
US20090291401A1 (en) * 2006-08-11 2009-11-26 Mitsubishi Heavy Industries, Ltd. Burner

Similar Documents

Publication Publication Date Title
US2515845A (en) Flame pocket fluid fuel burner
US4963089A (en) High turndown burner with integral pilot
US4872833A (en) Gas burner construction
US3574507A (en) Air/fuel mixing and flame-stabilizing device for fluid fuel burners
US3368604A (en) Combustion apparatus
US4441879A (en) Oil and gas burner for installation in heating and stream-producing boilers
US6443728B1 (en) Gas pipe ignitor
US3258058A (en) Radiant gas burners
US3223136A (en) Fluid fuel combustion apparatus
AU2002240309A1 (en) Gas pipe ignitor
US3676048A (en) Excess air burner
US2571336A (en) Gaseous fuel burner for furnace walls
US3529917A (en) Air-mixing device for fuel burner
US3187799A (en) Self-stabilizing combustion apparatus and method
US3689040A (en) Portable space heater and gas burner for the same
US4187835A (en) Indirect heat transfer apparatus
US3385527A (en) Oil burner head
US3265113A (en) Gas burner apparatus
US3754853A (en) Dual rate gaseous fuel burner assemblies
US3211207A (en) Air diffuser for oil burner
US3273623A (en) Self-stabilizing combustion apparatus
US3247884A (en) Burner means for furnaces
US3644077A (en) Flame stabilizing system for power gas burners
US3610536A (en) Combination gas/oil burner
US4019851A (en) High energy arc ignitor for burner