US3311154A - Fuel burners - Google Patents

Fuel burners Download PDF

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Publication number
US3311154A
US3311154A US457305A US45730565A US3311154A US 3311154 A US3311154 A US 3311154A US 457305 A US457305 A US 457305A US 45730565 A US45730565 A US 45730565A US 3311154 A US3311154 A US 3311154A
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US
United States
Prior art keywords
burners
casing
wall
burner
slot
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
US457305A
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English (en)
Inventor
Sumpter David George Henry
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.)
Associated British Combustion Ltd
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Associated British Combustion Ltd
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 Associated British Combustion Ltd filed Critical Associated British Combustion Ltd
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Publication of US3311154A publication Critical patent/US3311154A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D23/00—Assemblies of two or more burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements or dispositions of combustion apparatus

Definitions

  • the invention is more especially concerned with boilers which are fed from the front by means of banks of burners.
  • Each individual burner has had its separate aperture at the boiler front the boiler tubes being bent around these apertures within a frusto-conical collar.
  • the burners extending through the deep casings cause considerable difficulties in suspending the burners and allowing for expansion and contraction owing to large differences in temperature at the inside and the outside faces of the casing.
  • the present invention consists in an oil burner arrangement for boilers in which the burners are arranged in separate cells each cell comprising a plurality of burners with a common air supply.
  • the burners in each cell may be operated together, thus reducing the number of elements in the control systern.
  • the invention further consists in a fuel burner cell in the form of a generally rectangular box or casing with the burners disposed in a line centrally of the box and extending from the center part of one end towards the center part of the other end.
  • suitable baffles may be provided to aid in this distribution.
  • the cell wall may be conveniently sloped inwardly at the end through which spraying ends of the burners project.
  • the bottom (or top) will form the inlet for air and be closable by means of valves.
  • each cell once designed functions in exactly the same way and the problem of dividing the main air flow of a duct between the respective cells leading off from it becomes a relatively simple one, particularly as the air may be supplied at each end of each of the two ducts supplying the top and bottom cells respectively.
  • the air velocities may be increased without disturbing the flow pattern and this enables a reduction of the front to back dimensions, i.e. between the boiler wall and the outside wall and hence of the lengths of burners extending therebetween.
  • a further advantage of the use of individual burner cells is that each cell is independent as required expansion effects which are therefore minimised.
  • FIGURE 1 is a Side elevation in partial section of a cell according to the invention.
  • FIGURE 2 is an end elevation of the same in partial section
  • FIGURE 3 is a section on the line IIIIII of FIG. 1;
  • FIGURE 4 is an end elevation of the front of the lower end of a boiler supplied by means of banks of the cells;
  • FIGURE 5 is a side elevation of the same in partial section
  • FIGURE 6 shows a modified form of the baffles of FIGURE 1;
  • FIGURE 7 is a cut-away perspective view from inside a cell modified for use with gas.
  • FIGURE 8 is a similar cut-away perspective view from inside the furnace looking on the end of the cell.
  • the cells each comprise a generally rectangular boxor casing 1 with a front wall, spaced side walls including a first portion extending from opposite lateral ends of the front .wall, to mutually inclined portions leading to third and paralled portions defining a central vertical slot or passage.
  • the uppermost burner (as shown) is adjacent the top end (as shown) and the lowermost burner is some two thirds of the way down the box.
  • Two of the burners are provided with igniters 20.
  • valves 3a At the bottom of the box are provided valves 3a with resiliently flexible margins 3b for controlling the air supply and disposed in a separate damper box 3 which may be extracted from the cell 1 and as shown is shorter than the cell front to back with the bottom or partial base wall of the cell being extended to lead to it.
  • Each burner from its exit end towards its entry end is enclosed within a rectangular duct 4 the length of which increases from the lowermost burner towards the uppermost.
  • These ducts defined by horizontal dividers extending between the side walls and which ducts have open ends within the box lying in an inclined plane roughly diagonal in relation to the box; These ducts or passages surround the respective burners and constrain the air to flow around the individual burners through the outlet slot.
  • This provides for separate equal air streams to each burner.
  • the dimension of the air into equal streams may be assisted by suitably placed baffies 4a curving towards the damper box.
  • a duct 1a supplies cooling air to a main pipe 112 with branches 10 by which the cooling air is fed to each burner.
  • the uppermost ends of the cells as described are adjacent in the two rows.
  • Each burner in a cell is supplied from an automatic oil valve 5 from an oil fuel manifold 6.
  • Steam manifold 7 respectively supplies automatic steam valves 8 which also supply the burners of the respective cells.
  • valves 3 of the respective cells are supplied from upper and lower ducts or air casings 9, 10, respectively.
  • Suitable bafiies or air guides 11, 12 may be provided within the cells.
  • Coupling blocks 13 are fitted on the outer ends of the burners to connect to the oil supply.
  • the boiler tubes 14 for each pair of top and bottom cells as shown in FIGURES? and 4 are bent into overlaping relationship to form one vertical slot for the twleve burners of the two cells.
  • the invention may also be used to cater for gas firing, both using this fuel alone and with a combination of gas and oil.
  • the way in which this may be done is shown in FIGURES 7 and 8.
  • Gas is introduced by means of a flanged connection 15, into a volume formed by the double skinning on both sides of the cell at the forward end.
  • the gas is led from this space by means of contoured louvres 16, which adjoin the inside skin of the cell and are shaped forward to form an annular gas space around the outside diameter of each burner swirler.
  • the gas passing through this annular ring is deflected by a series of angled vanes 17 before being burnt.
  • the number of cells per boiler may vary from two upwards.
  • atomisers and sprayers can be used. These are:
  • a burner cell comprising a rectangular casing including a front wall, an end wall, a partial base wall parallel to the said end wall and remote from the front wall and spaced side walls including parallel portions and converging portions defining a slot along the center line of the casing, said slot having substantially less transverse dimension than the corresponding dimension of the casing, a plurality of burners extending into the casing in superposed relation along the vertical center line thereof, means mounting the burners in the front wall, each burner having a delivery and extending through said slot, vertically spaced horizontally arranged dividers extending between the side walls in alternating arrangement with said burners and cooperating with said end wall, said side walls and partial base wall to define a rectangular passage around each burner, said dividers increasing in length from said base wall toward said end wall, and valve controlled conduit means communicating with said casing between said front wall and partial base wall for introducing air into said casing whereby it is distributed by said dividers to flow through said slot around the respective burners.
  • valve controlled conduit means comprising wall means communicating with the cell between the side, front and partial base walls, and a removable damper box associated with said wall means and having damper valves therein for controlling air flow to said cell.
  • a burner cell comprising a rectangular casing including a front wall, spaced side walls and an end wall, each side wall including a first portion extending away from one lateral edge of the front wall and parallel to the first portionof the other side wall, a second portion inclined toward the opposite side wall and a third portion extending to an outlet and parallel to the third portion of the other side wall to define therewith an elongated rectangular vertically extending outlet slot, said casing also including a partial base wall extending rearwardly of said slot toward and terminating short of said front wall, a plurality of burners extending through the casing in superposed relation along the vertical center line thereof, said slot having substantially less transverse dimension than the corresponding dimension of the casing, means mounting each burner in the front wall, each burner having a delivery end extending through said slot, vertically spaced horizontally arranged dividers eX- tending between said side walls and in alternating arrange ment with said burners and cooperating with said end wall, said side walls and partial base wall to define

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Gas Burners (AREA)
  • Combustion Of Fluid Fuel (AREA)
US457305A 1964-05-25 1965-05-20 Fuel burners Expired - Lifetime US3311154A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB21429/64A GB1113593A (en) 1964-05-25 1964-05-25 Improvements in or relating to fuel burners

Publications (1)

Publication Number Publication Date
US3311154A true US3311154A (en) 1967-03-28

Family

ID=10162812

Family Applications (1)

Application Number Title Priority Date Filing Date
US457305A Expired - Lifetime US3311154A (en) 1964-05-25 1965-05-20 Fuel burners

Country Status (7)

Country Link
US (1) US3311154A (da)
BE (1) BE664481A (da)
DE (1) DE1501772A1 (da)
DK (1) DK107571C (da)
GB (1) GB1113593A (da)
NL (1) NL6506664A (da)
SE (1) SE321754B (da)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US474344A (en) * 1892-05-03 Apparatus for generating heat
GB266827A (en) * 1925-12-05 1927-03-07 Albin Berthold Helbig Improvements relating to powdered fuel furnaces
US2392822A (en) * 1944-05-24 1946-01-15 Riley Stoker Corp Gas burner
US3135314A (en) * 1959-12-23 1964-06-02 Sulzer Ag Multiple fuel firing method and apparatus
US3202196A (en) * 1962-05-15 1965-08-24 Babcock & Wilcox Co Method and apparatus for burning fuel

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US474344A (en) * 1892-05-03 Apparatus for generating heat
GB266827A (en) * 1925-12-05 1927-03-07 Albin Berthold Helbig Improvements relating to powdered fuel furnaces
US2392822A (en) * 1944-05-24 1946-01-15 Riley Stoker Corp Gas burner
US3135314A (en) * 1959-12-23 1964-06-02 Sulzer Ag Multiple fuel firing method and apparatus
US3202196A (en) * 1962-05-15 1965-08-24 Babcock & Wilcox Co Method and apparatus for burning fuel

Also Published As

Publication number Publication date
SE321754B (da) 1970-03-16
DE1501772A1 (de) 1969-09-18
GB1113593A (en) 1968-05-15
NL6506664A (da) 1965-11-26
BE664481A (da) 1965-09-16
DK107571C (da) 1967-06-12

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