US20100064986A1 - Burner, and combustion equipment and boiler comprising burner - Google Patents

Burner, and combustion equipment and boiler comprising burner Download PDF

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Publication number
US20100064986A1
US20100064986A1 US12/442,745 US44274507A US2010064986A1 US 20100064986 A1 US20100064986 A1 US 20100064986A1 US 44274507 A US44274507 A US 44274507A US 2010064986 A1 US2010064986 A1 US 2010064986A1
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United States
Prior art keywords
fuel
containing fluid
furnace
burner
supply nozzle
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Abandoned
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US12/442,745
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English (en)
Inventor
Kenji Kiyama
Akira Baba
Takanori Yano
Osamu Okada
Hirofumi Okazaki
Kouji Kuramashi
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Mitsubishi Hitachi Power Systems Ltd
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Babcock Hitachi KK
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Assigned to BABCOCK-HITACHI KABUSHIKI KAISHA reassignment BABCOCK-HITACHI KABUSHIKI KAISHA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BABA, AKIRA, KIYAMA, KENJI, KURAMASHI, KOUJI, OKADA, OSAMU, OKAZAKI, HIROFUMI, YANO, TAKANORI
Publication of US20100064986A1 publication Critical patent/US20100064986A1/en
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D1/00—Burners for combustion of pulverulent fuel
    • F23D1/005—Burners for combustion of pulverulent fuel burning a mixture of pulverulent fuel delivered as a slurry, i.e. comprising a carrying liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D1/00—Burners for combustion of pulverulent fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
    • F22B1/1869—Hot gas water tube boilers not provided for in F22B1/1807 - F22B1/1861
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
    • F22B21/22—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes of form other than straight or substantially straight
    • F22B21/26—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes of form other than straight or substantially straight bent helically, i.e. coiled
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C99/00—Subject-matter not provided for in other groups of this subclass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2201/00—Burners adapted for particulate solid or pulverulent fuels
    • F23D2201/10—Nozzle tips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2201/00—Burners adapted for particulate solid or pulverulent fuels
    • F23D2201/20—Fuel flow guiding devices

Definitions

  • the present invention relates to a burner and a combustion equipment and a boiler including the burner, and particularly relates to a burner capable of performing low nitrogen oxide (NOx) combustion at high efficiency.
  • NOx nitrogen oxide
  • FIG. 28 shows an example of a solid fuel (pulverized coal, biomass fuel, etc.) burner according to a conventional art.
  • FIG. 28A is a side sectional view of the burner
  • FIG. 28B is a front view of the burner as viewed from a furnace ( 4 ) side.
  • the solid fuel burner includes a fuel-containing fluid supply nozzle ( 12 ), defining a fuel-containing fluid flow passage through which a fuel-containing fluid ( 11 ), containing a solid fuel and a conveying primary air, flows toward the furnace ( 4 ), and a combustion air sleeve ( 15 ) disposed at an outer periphery of the fuel-containing fluid supply nozzle ( 12 ), and air inside a windbox ( 3 ) is supplied as a secondary air ( 13 ) and a tertiary air ( 14 ) through a combustion air flow passage defined by the sleeve ( 15 ).
  • a flame stabilizer ( 17 ) is disposed at a front end of the fuel-containing fluid supply nozzle ( 12 ), and ignition of the fuel from a vicinity of the burner is enabled by an effect of a circular vortex formed at a wake of the flame stabilizer ( 17 ).
  • a front end of the combustion air sleeve ( 15 ) is disposed at a position facing a burner throat ( 16 ), a combustion air guide plate ( 15 a ), spreading outside the burner, is disposed at the front end of the sleeve ( 15 ), the tertiary air ( 14 ) is spread outward by the combustion air guide plate ( 15 a ) to delay mixing of air into a central part of a flame, and by promotion of combustion under a reducing atmosphere condition of insufficient air, generation of nitrogen oxides (NOx) in a combustion gas is suppressed.
  • NOx nitrogen oxides
  • FIG. 1C is a sectional view taken in a direction along an ejection flow of the fuel-containing fluid ( 11 ) at the fuel-containing fluid supply nozzle ( 12 ) in the burner of the conventional art, and as shown in FIG. 1D , which is a front view of an outlet part of the fuel-containing fluid supply nozzle ( 12 ) of the burner in FIG. 1C as viewed from the furnace ( 4 ) side, with the burner of the conventional art, a cross section of the outlet part of the fuel-containing fluid supply nozzle ( 12 ) has a shape close to a circular shape.
  • the fuel-containing fluid ( 11 ) When the fuel-containing fluid ( 11 ) is loaded into the furnace ( 4 ), the fuel is ignited near the outlet of the fuel-containing fluid supply nozzle ( 12 ) by heating due to radiation inside the furnace ( 4 ) and actions of the circular vortex at the wake of the flame stabilizer ( 17 ).
  • FIG. 29A is a sectional view taken in a direction along the ejection flow of the fuel-containing fluid ( 11 ) at the fuel-containing fluid supply nozzle ( 12 ) in the burner of the conventional art, and an ignition position ( 33 ) of the fuel in the fuel-containing fluid ejected from the fuel-containing fluid supply nozzle ( 12 ) into the furnace ( 4 ) is formed as shown in FIG. 29B , which is a front view of the outlet part of the fuel-containing fluid supply nozzle ( 12 ) as viewed from the furnace ( 4 ) side.
  • FIG. 30 schematically shows a propagation behavior of the flame inside the furnace ( 4 ) in a cross-sectional direction along the ejection flow of the fuel-containing fluid ( 11 ) at the fuel-containing fluid supply nozzle ( 12 ) in the burner of the conventional art.
  • An ignited region ( 32 ) is formed around an unignited region ( 31 ) of conical shape.
  • the burner of circular cross section shown in FIGS. 28 to 30 , is frequently used in a so-called opposed firing configuration in which the burners is disposed at each of a pair of opposing furnace walls.
  • so-called tangential firing in which the fuel is combusted while the fuel-containing fluid is ejected into the furnace ( 4 ) in directions of applying a rotation along a furnace wall surface from outlets of a plurality of fuel-containing fluid supply nozzles ( 12 ), an outlet shape of a transverse section (section orthogonal to the flow of the fuel-containing fluid) of each fuel-containing fluid supply nozzle ( 12 ) is made a square shape or a rectangular shape close to a square shape in many cases.
  • Burners with which the outlet shape of the transverse section (section orthogonal to the flow of the fuel-containing fluid) of the fuel-containing fluid supply nozzle ( 12 ) is made a rectangular shape, an elliptical shape, or a substantially elliptical shape with major and minor axis parts, are disclosed in the following Patent Documents 1 to 3.
  • Patent Document 1 Japanese Translation of International Application (Kohyo) No. Sho 59-500981
  • Patent Document 2 Japanese Published Patent Application No. Hei 8-226615
  • Patent Document 3 Japanese Published Patent Application No. Hei 11-281009
  • a cross section of an outlet part of a fuel-containing fluid supply nozzle ( 12 ) of a burner has a shape close to a circular shape or a square shape, and there are cases where, as shown in FIG. 30 , a flame ignited at an outer side of a fuel-containing fluid ejection flow in a furnace ( 4 ) must propagate a considerable distance to reach a central part of the fuel-containing fluid ejection flow.
  • a distance in a fuel-containing fluid ( 11 ) ejection flow direction from the fuel-containing fluid supply nozzle ( 12 ) that is required for the ignited flame to propagate to the central part of the fuel ejection flow in other words, an unignited distance L 1 ′ shown in FIG.
  • an unignited region ( 31 ) is more expanded the larger a diameter or a peripheral part of the fuel-containing fluid supply nozzle ( 12 ).
  • promotion of combustion in a reducing region in a vicinity of the burner is important for suppressing NOx generation in a combustion gas
  • expansion of the unignited region ( 31 ) inhibits the NOx concentration suppression characteristic. Expansion of the unignited region ( 31 ) also means that a combustion time after ignition is short and causes lowering of combustion efficiency.
  • An object of the present invention is to provide a solid fuel burner that is increased in capacity over the conventional art and yet is suppressed in expansion of an unignited region to prevent increase of NOx concentration in a combustion gas and prevent lowering of combustion efficiency, a combustion equipment and a boiler including the burner.
  • a first aspect of the present invention provides a burner including: a fuel-containing fluid supply nozzle ( 12 ) supplying a fuel-containing fluid ( 11 ), containing a solid fuel and a medium for transfer of the solid fuel, to an outlet part disposed on a wall surface of a furnace ( 4 ) from a connecting part ( 10 a ) of a fuel-containing fluid transfer flow passage ( 10 ) that transfers the fluid ( 11 ); and one or more air supply nozzles ( 15 ) supplying combustion air and disposed at an outer peripheral part of the fuel-containing fluid supply nozzle ( 12 ); and where, from the connecting part ( 10 a ) of the fluid transfer flow passage ( 10 ) toward the outlet part disposed on the wall surface of the furnace ( 4 ), a cross section of the fuel-containing fluid supply nozzle ( 12 ) perpendicular to a flow of the fluid ( 11 ) has a rectangular, elliptical, or substantially elliptical shape with major and minor axis parts and, from the connecting part ( 10 a
  • a fourth aspect of the present invention provides the burner according to the first aspect where the fuel-containing fluid supply nozzle ( 12 ) has, in an interior thereof, fuel-containing fluid guide plates ( 19 ) plurally partitioning the flow of the fuel-containing fluid ( 11 ).
  • a fifth aspect of the present invention provides the burner according to the fourth aspect where the fuel-containing fluid guide plates ( 19 ) are disposed at a plurality of different inclination angles with respect to a plane passing along a line extending a central axis in the direction of the flow of the fluid ( 11 ) in the fuel-containing fluid supply nozzle ( 12 ) toward the furnace ( 4 ) and parallel to a shortest axis of the minor axis part of the nozzle ( 12 ).
  • a sixth aspect of the present invention provides the burner according to any of the first, fourth and fifth aspects where the fuel-containing fluid supply nozzle ( 12 ) has, in an interior of the outlet thereof, fuel-containing fluid direction changing guide plates ( 21 ) forcibly changing a direction of ejection flow of the fuel-containing fluid ( 11 ).
  • a seventh aspect of the present invention provides the burner according to the sixth aspect where the fuel-containing fluid direction changing guide plates ( 21 ) are disposed in a plurality of mutually different directions with respect to planes parallel to a plane passing along the line extending the central axis of the fuel-containing fluid supply nozzle ( 12 ) toward the furnace ( 4 ) and passing through a longest axis of the major axis part of the nozzle ( 12 ).
  • An eighth aspect of the present invention provides the burner according to the sixth aspect where the fuel-containing fluid direction changing guide plates ( 21 ) for a portion of the fuel-containing fluid ( 11 ) are disposed parallel to planes parallel to a plane passing along the line extending the central axis of the fuel-containing fluid supply nozzle ( 12 ) toward the furnace ( 4 )and passing through a longest axis of the major axis part of the nozzle ( 12 ), and the fuel-containing fluid direction changing guide plates ( 21 ) for another portion of the fuel containing fluid ( 11 ) are disposed at an inclination angle with respect to planes parallel to the plane passing along the line extending the central axis of the fuel-containing fluid supply nozzle ( 12 ) toward the furnace ( 4 ) and passing through the longest axis of the major axis part of the nozzle ( 12 ).
  • a ninth aspect of the present invention provides the burner according to the fourth aspect where the fuel-containing fluid supply nozzle ( 12 ) is partitioned into a plurality of flow passages by the fuel-containing fluid guide plates ( 19 ), and central axes of the respective flow passages are disposed at the wall surface of the furnace ( 4 ) at a plurality of mutually different inclination angles with respect to planes parallel to a plane passing along the line extending the central axis of the fuel-containing fluid supply nozzle ( 12 ) toward the furnace ( 4 ) and passing through a longest axis of the major axis part of the nozzle ( 12 ) outlet.
  • a tenth aspect of the present invention provides the burner according to any of the first and fourth to ninth aspects where fuel-containing fluid partitioning plates ( 22 ), capable of plurally partitioning the outlet part of the fuel-containing fluid supply nozzle ( 12 ), are disposed at the outlet part.
  • An eleventh aspect of the present invention provides the burner according to any of the first and fourth to tenth aspects where a flame stabilizer ( 17 ) with an L-shaped cross section is disposed at the outlet part of the fuel-containing fluid supply nozzle ( 12 ).
  • a twelfth aspect of the present invention provides the burner according to the eleventh aspect where a guide plate ( 17 a ) outwardly changing an ejection direction of the combustion air in a periphery of the flame stabilizer ( 17 ) is disposed at a front end of the L-shaped flame stabilizer ( 17 ).
  • a thirteenth aspect of the present invention provides the burner according to any of the first and fourth to twelfth aspects where a combustion air guide plate ( 15 a ), outwardly spreading an ejection direction of the combustion air at an outer side of the one or more combustion air supply nozzles ( 15 ) disposed at the outer peripheral part of the nozzle ( 12 ) with respect to a fuel ejection direction, is disposed at a front end of the fuel-containing fluid supply nozzle ( 12 ).
  • a fourteenth aspect of the present invention provides the burner according to any one of the first and fourth to thirteenth aspects where a condenser ( 23 ), narrowing the flow passage of the fuel-containing fluid ( 11 ) once and then expanding the flow passage again, is disposed in an interior of the fuel-containing fluid supply nozzle ( 12 ).
  • a fifteenth aspect of the present invention provides the burner according to any one of the first and fourth to fourteenth aspects where a fluid distribution plate ( 24 ) distributing the fuel uniformly inside the fuel-containing fluid supply nozzle ( 12 ) is disposed at an inlet part of the fuel-containing fluid supply nozzle ( 12 ).
  • a sixteenth aspect of the present invention provides the burner according to any of the first and fourth to fifteenth aspects where a nozzle ( 41 , 44 ), ejecting a liquid fuel or a gas fuel that is an auxiliary fuel to a vicinity of the fluid ( 11 ) ejected from the fuel-containing fluid supply nozzle ( 12 ), is disposed at the vicinity of the fuel-containing fluid supply nozzle ( 12 ).
  • a seventeenth aspect of the present invention provides a combustion equipment where the burners according to any of the first and fourth to sixteenth aspects are disposed in a plurality of stages in an up/down direction at each of two opposing furnace walls, and a plurality of burners disposed at each stage are disposed respectively symmetrically in wall surface regions divided in two at a central part of width in a horizontal direction of the same furnace wall.
  • An eighteenth aspect of the present invention provides a combustion equipment where the burners according to any of the first and fourth to sixteenth aspects are disposed in the plurality of stages in the up/down direction at each of the two opposing furnace walls, and burners, which, among the plurality of burners disposed in each stage of the same furnace wall, are adjacent each other in the horizontal direction, are burners of the same structure.
  • a nineteenth aspect of the present invention provides a boiler including: a furnace wall formed by spirally winding a set of water wall tubes ( 25 ) inclined with respect to a horizontal direction; and where openings ( 26 ) of rectangular, elliptical, or substantially elliptical shape are disposed in the furnace wall along a longitudinal direction of the water wall tubes ( 25 ) and the burner according to any of the first and fourth to sixteenth aspects is mounted in each opening ( 26 ).
  • a twentieth aspect of the present invention provides a boiler including: a furnace wall formed by a set of water wall tubes ( 25 ) extending in a vertical direction; and where openings ( 26 ) of rectangular, elliptical, or substantially elliptical shape are disposed in the furnace wall along a longitudinal direction of the water wall tubes ( 25 ) and the burner according to any of the first and fourth to sixteenth aspects is mounted in each opening ( 26 ).
  • expansion of an unignited region can be suppressed even if a burner capacity is increased, an unignited distance can be reduced effectively in comparison with the conventional art because the fuel-containing fluid ( 11 ) spreads in the width direction even after the fuel-containing fluid ( 11 ) is loaded into the furnace ( 4 ) so that a cross-sectional area of the ejection flow of the fuel-containing fluid ( 11 ) increases and a flow velocity decreases, and also because the fuel-containing fluid ( 11 ) spreads inside the furnace ( 4 ), a combustion space can be utilized effectively and a practical furnace retention time is made long, thereby providing effects of reducing NOx concentration in a combustion gas and improving combustion efficiency.
  • the size of the minor axis part of the fuel-containing fluid supply nozzle ( 12 ) is unchanged, and this is effective for simplification of structure. Also, a flow velocity at an upstream side of the fuel-containing fluid supply nozzle ( 12 ) can be made high, and this is effective for preventing backfiring in a case of a readily ignitable fuel, etc.
  • the fuel-containing fluid ( 11 ) is partitioned plurally by the fuel-containing fluid guide plates ( 19 ) in the interior of the fuel-containing fluid supply nozzle ( 12 ), the fuel-containing fluid ( 11 ) is supplied uniformly in the direction in which the fuel-containing fluid supply nozzle ( 12 ) expands from the fuel-containing fluid connecting part ( 10 a ) toward the outlet part of the nozzle ( 12 ), and the effects of NOx reduction, improvement in combustion efficiency, suppression of flow velocity increase, minimization of pressure loss, and suppression of wear of component parts are improved in comparison with other those of the third aspect of the present invention.
  • the fuel-containing fluid guide plates ( 19 ) are respectively disposed in mutually opposing directions with respect to the planes parallel to the plane passing along the line extending the central axis of the fuel-containing fluid supply nozzle ( 12 ) toward the furnace ( 4 ) and passing through the longest axis of the major axis part of the nozzle ( 12 ), the fuel-containing fluid ( 11 ) can be ejected into the furnace ( 4 ) in two or more groups and the fuel-containing fluid ejection flow ( 20 ) can thereby be divided into groups by a simple structure to provide the effects of promoting the dispersion of the fuel-containing fluid ejection flow ( 20 ) inside the furnace ( 4 ) and promoting the combustion at the wake part of the furnace ( 4 ).
  • the eighth aspect of the present invention by dividing four fuel-containing fluid ejection flows ( 20 ), formed by the fuel-containing fluid supply nozzle ( 12 ) and the fuel-containing fluid guide plates ( 19 ) into two groups ( 20 a, 20 b ) and thereby making, for example, fuel-containing fluid ejection flows ( 20 a ), adjacent a furnace side wall, rectilinear flows and making fuel-containing fluid ejection flows ( 20 b ), not adjacent the furnace side wall, be ejected upon applying an inclination with respect to a horizontal direction, an effect of preventing ash deposition by suppressing flame inflow to a vicinity of the furnace side wall while maintaining promotion of combustion at the furnace wake part by dispersion of the fuel is provided.
  • the fuel-containing fluid ( 11 ) can be ejected into the furnace ( 4 ) at mutually different angles with respect to the horizontal direction or the vertical direction from the fuel-containing fluid supply nozzle ( 12 ) and the fuel-containing fluid ejection flow ( 20 ) can be varied in direction without using parts inside the fuel-containing fluid supply nozzle ( 12 ) with which pulverized coal or other solid fuel collides directly, wear of parts can be suppressed effectively.
  • the fuel-containing fluid ejection flow ( 20 ) is partitioned by the fuel-containing fluid partitioning plates ( 22 ) to be increased in surface area, and radiant heat inside the furnace ( 4 ) is thereby increased and a negative pressure region is formed at the wake side of the fluid partitioning plates ( 22 ), thereby making a high temperature gas in a periphery flow into the negative pressure region to contribute to early ignition of the fuel, promote combustion at a reducing region in the vicinity of the burner, and effectively contribute to the reduction of the NOx concentration in the combustion gas and the improvement in the combustion efficiency.
  • the eleventh aspect of the present invention by disposing the flame stabilizer ( 17 ) with the L-shaped cross section at the outlet part of the fuel-containing fluid supply nozzle ( 12 ), a circular vortex is formed at the wake of the flame stabilizer ( 17 ) and draws back the high-temperature combustion gas to a vicinity of the flame stabilizer ( 17 ) to contribute to early ignition of the fuel, promote combustion at the reducing region in the vicinity of the burner, and effectively contribute to the reduction of the NOx concentration in the combustion gas and the improvement in the combustion efficiency in compassion with the eleventh aspect of the invention.
  • the secondary air guide plate ( 17 a ) at the front end of the flame stabilizer ( 17 ) of L-shaped cross section the secondary air is spread outward and the circular vortex at the wake of the flame stabilizer ( 17 ) is enlarged, thereby increasing a recirculation amount of the high-temperature combustion gas to further quicken ignition of the fuel, promote combustion at the reducing region near the burner, and effectively contribute to the reduction of the NOx concentration in the combustion gas and the improvement in the combustion efficiency in comparison with the eleventh aspect of the invention.
  • the combustion air guide plate ( 15 a ) that spreads the combustion air ejection direction at the outer side of the combustion air supply nozzles ( 15 ) outward with respect to the fuel-containing fluid ejection direction, the combustion air is spread outward, thereby enlarging the reducing region at a central part of the flame and effectively contributing to the reduction of the NOx concentration in the combustion gas and the improvement in the combustion efficiency.
  • the fuel in the vicinity of the flame stabilizer ( 17 ) is condensed by the condenser ( 23 ) thereby contributing to early ignition of the fuel to promote combustion at a reducing region in the vicinity of the burner and effectively contributing to the reduction of the NOx concentration in the combustion gas and the improvement in the combustion efficiency.
  • the fuel concentration at the inlet part of the fuel-containing fluid supply nozzle ( 12 ) is made uniform by the fluid distribution plate ( 24 ) to suppress imbalance of concentration of the fuel flowing into the respective flow passages partitioned by the fuel-containing fluid guide plates ( 19 ), and this is effective for NOx reduction and improvement in the combustion efficiency.
  • the fuel-containing fluid ( 11 ) that contains the solid fuel can be ignited reliably.
  • the burners according to any of the first and fourth to sixteenth aspects being disposed in the plurality of stages in the up/down direction at each of the opposing furnace walls of the opposed firing type furnace ( 4 ) and by disposing the plurality of burners of each stage respectively symmetrically at the wall surface regions divided in two at the central part of width in the horizontal direction of the same furnace wall, the directions of the fluid ejection flows ( 20 a, 20 b ) can be made left/right symmetrical at a single furnace wall surface and good left/right balance of flow and combustion states can be maintained in the furnace ( 4 ).
  • the burners according to any of the first and fourth to sixteenth aspects being disposed in the plurality of stages in the up/down direction at each of the two opposing furnace walls of the opposed firing type furnace ( 4 ) and by making the burners, which, among the plurality of burners disposed in each stage of the same furnace wall, are adjacent each other in the horizontal direction, burners of the same structure, collision of the fuel-containing fluid ejection flows ( 20 a, 20 b ) can be avoided, especially in a furnace ( 4 ) of small capacity, to suppress localized concentration of fuel and provide the effects of reducing the NOx concentration in the combustion gas and improving the combustion efficiency.
  • a number of the spiral water wall tubes ( 25 ) necessary for forming the openings ( 26 ) can be made small and an economical boiler can be constructed with few processed and bent parts in the water wall tubes ( 25 ).
  • the number of the spiral water wall tubes ( 25 ) necessary for forming the openings ( 26 ) can be minimized to improve economy.
  • the fuel-containing fluid ( 11 ) spreads in the horizontal (width) direction of the furnace ( 4 )
  • distribution of the fuel-containing fluid ( 11 ) in the horizontal (width) direction of the furnace ( 4 ) is made uniform, the practical furnace retention time is made longer, and the effects of reducing the NOx concentration in the combustion gas and improving the combustion efficiency are provided.
  • the rectangular openings ( 26 ) are installed on the furnace wall along the arrangement of the water wall tubes ( 25 ) in the vertical direction, by aligning the longitudinal direction of the water wall tubes ( 25 ) with the longitudinal direction of the major axis parts of the openings ( 26 ), an economical boiler can be constructed with few processed and bent parts in the water wall tubes ( 25 ).
  • FIG. 1 shows explanatory diagrams of ignited regions of burner outlets according to the present invention and a conventional art.
  • FIG. 2 shows explanatory diagrams of unignited regions of the burner outlets according to the present invention and the conventional art.
  • FIG. 3 shows a configuration example of a burner according to an embodiment of the present invention
  • FIG. 3A is a sectional view taken in a direction parallel to a plane passing through a central axis of the burner and passing through a longest axis of a major axis part of an outlet part
  • FIG. 3B is a sectional view taken on line A-A of FIG. 3A
  • FIG. 3C is a front view of the outlet part of the burner as viewed from the furnace side).
  • FIG. 4 shows a configuration example of a burner according to an embodiment of the present invention
  • FIG. 4A is a sectional view taken in a direction parallel to a plane passing through a central axis of the burner and passing through a longest axis of a major axis part of an outlet part
  • FIG. 4B is a sectional view taken on line A-A of FIG. 4A
  • FIG. 4C is a front view of the outlet part of the burner as viewed from the furnace side).
  • FIG. 5 shows a configuration example of a burner according to an embodiment of the present invention
  • FIG. 5A is a sectional view taken in a direction parallel to a plane passing through a central axis of the burner in a direction parallel to and passing through a longest axis of a major axis part of an outlet part
  • FIG. 5B is a sectional view taken on line A-A of FIG. 5A
  • FIG. 5C is a front view of the outlet part of the burner as viewed from the furnace side).
  • FIG. 6 shows a configuration example of a burner according to an embodiment of the present invention
  • FIG. 6A is a sectional view taken in a direction parallel to a plane passing through a central axis of the burner and passing through a longest axis of a major axis part of an outlet part
  • FIG. 6B is a sectional view taken on line A-A of FIG. 6A
  • FIG. 6C is a front view of the outlet part of the burner as viewed from the furnace side).
  • FIG. 7 shows a configuration example of a burner according to an embodiment of the present invention
  • FIG. 7A is a sectional view taken in a direction parallel to a plane passing through a central axis of the burner and passing through a longest axis of a major axis part of an outlet part
  • FIG. 7B is a sectional view taken on line B-B of FIG. 7A
  • FIG. 7C is a sectional view taken on line A-A of FIG. 7A ).
  • FIG. 8 shows a configuration example of a burner according to an embodiment of the present invention
  • FIG. 8A is a sectional view taken in a direction parallel to a plane passing through a central axis of the burner and passing through a longest axis of a major axis part of an outlet part
  • FIG. 8B is a sectional view taken on line B-B of FIG. 8A
  • FIG. 8C is a sectional view taken on line A-A of FIG. 8A ).
  • FIG. 9 shows a configuration example of a burner according to an embodiment of the present invention
  • FIG. 9A is a sectional view taken in a direction parallel to a plane passing through a central axis of the burner and passing through a longest axis of a major axis part of an outlet part
  • FIG. 9B is perspective view of the burner
  • FIG. 9C is a sectional view taken on line B-B of FIG. 9A
  • FIG. 9D is a sectional view taken on line A-A of FIG. 9A ).
  • FIG. 10 shows a configuration example of a burner according to an embodiment of the present invention
  • FIG. 10A is a sectional view taken in a direction parallel to a plane passing along a line, passing through a central axis of the burner and extending toward the furnace, and passing through a longest axis of a major axis part of an outlet part
  • FIG. 10B is a sectional view taken on line A-A of FIG. 10A
  • FIG. 10C is a front view of the outlet part of the burner as viewed from the furnace side).
  • FIG. 11 is an explanatory diagram of effects of the invention shown in FIG. 10 .
  • FIG. 12 shows a configuration example of a burner according to an embodiment of the present invention shown in FIG. 10
  • FIG. 12A is a sectional view taken in a direction parallel to a plane passing along a line, passing through a central axis of the burner and extending toward the furnace, and passing through a longest axis of a major axis part of an outlet part
  • FIG. 12B is a sectional view taken on line A-A of FIG. 12A
  • FIG. 12C is a front view of the outlet part of the burner as viewed from the furnace side).
  • FIG. 13 shows a configuration example of a burner according to an embodiment of the present invention
  • FIG. 13A is a sectional view taken in a direction parallel to a plane passing through a central axis of the burner and passing through a longest axis of a major axis part of an outlet part
  • FIG. 13B is a sectional view taken on line A-A of FIG. 13A
  • FIG. 13C is a front view of the outlet part of the burner as viewed from the furnace side).
  • FIG. 14 shows a configuration example of a burner according to an embodiment of the present invention
  • FIG. 14A is a sectional view taken in a direction parallel to a plane passing through a central axis of the burner and passing through a longest axis of a major axis part of an outlet part
  • FIG. 14B is a sectional view taken on line A-A of FIG. 14A
  • FIG. 14C is a front view of the outlet part of the burner as viewed from the furnace side).
  • FIG. 15 shows a configuration example of a burner according to an embodiment of the present invention
  • FIG. 15A is a sectional view taken in a direction parallel to a plane passing through a central axis of the burner and passing through a longest axis of a major axis part of an outlet part
  • FIG. 15B is a sectional view taken on line A-A of FIG. 15A
  • FIG. 15C is a front view of the outlet part of the burner as viewed from the furnace side).
  • FIG. 16 shows a configuration example of a burner according to an embodiment of the present invention
  • FIG. 16A is a sectional view taken in a direction parallel to a plane passing through a central axis of the burner and passing through a longest axis of a major axis part of an outlet part
  • FIG. 16B is a sectional view taken on line A-A of FIG. 16A
  • FIG. 16C is a front view of the outlet part of the burner as viewed from the furnace side).
  • FIG. 17 shows a configuration example of a burner according to an embodiment of the present invention
  • FIG. 17A is a sectional view taken in a direction parallel to a plane passing through a central axis of the burner and passing through a longest axis of a major axis part of an outlet part
  • FIG. 17B is a sectional view taken on line A-A of FIG. 17A
  • FIG. 17C is a front view of the outlet part of the burner as viewed from the furnace ( 4 ) side).
  • FIG. 18 shows a configuration example of a burner according to an embodiment of the present invention
  • FIG. 18A is a sectional view parallel to a fuel-containing fluid supply nozzle ( 12 ) surface formed through a long edge of an outlet part of the nozzle ( 12 ) (sectional view taken on line B-B of FIG. 18B )
  • FIG. 18B is a sectional view taken on line A-A of FIG. 18A
  • FIG. 18C is a front view of the outlet part of the burner as viewed from the furnace side).
  • FIG. 19 shows an example where an oil supply nozzle is installed at a central part of a fuel-containing fluid supply nozzle.
  • FIG. 20 shows an example where gas supply nozzles are installed in a periphery of a flame stabilizer.
  • FIG. 21 shows a front view ( FIG. 21A ) and a plan view ( FIG. 21B ) of a fuel-containing fluid supply nozzle.
  • FIG. 22 shows a front view ( FIG. 22A ) and a plan view ( FIG. 22B ) of a fuel-containing fluid supply nozzle of another configuration.
  • FIG. 23 shows an example where a plurality of the fuel-containing fluid supply nozzles, shown in FIG. 21 , are positioned in three stages in an up/down direction and four columns in a horizontal direction on a single furnace wall surface.
  • FIG. 24 shows an example where a plurality of the fuel-containing fluid supply nozzles, shown in FIGS. 21 and 22 , are positioned in three stages in an up/down direction and four columns in a horizontal direction on a single furnace wall surface.
  • FIG. 25 shows another embodiment where a plurality of the fuel-containing fluid supply nozzles, shown in FIG. 21 , are positioned in three stages in an up/down direction and four columns in a horizontal direction on a single furnace wall surface.
  • FIG. 26 is a plan view of a furnace wall of a boiler in which burners according to an embodiment of the present invention are disposed.
  • FIG. 27 is a plan view of a furnace wall of a boiler in which burners according to an embodiment of the present invention are disposed.
  • FIG. 28 shows an example of a solid fuel burner according to a conventional art ( FIG. 28A is a side sectional view of the burner, and FIG. 28B is a front view of the burner as viewed from a furnace side).
  • FIG. 29A is a sectional view taken in a direction along an ejection flow of a fuel-containing fluid at a fuel-containing fluid supply nozzle in the burner of the conventional art
  • FIG. 29B is a front view of an outlet part of a fuel-containing fluid supply nozzle as viewed from the furnace side.
  • FIG. 30 is schematic diagram of a flame propagation behavior inside the furnace in a cross-sectional direction along the ejection flow of the fuel-containing fluid at the fuel-containing fluid supply nozzle in the burner of the conventional art.
  • FIG. 1 an ignition position ( 33 ) in a furnace ( 4 ) using a fuel-containing fluid supply nozzle ( 12 ) of a burner according to an embodiment shown in FIGS. 1A and 1B is compared with that in a conventional art shown in FIGS. 10 and 1D .
  • FIG. 1A is a sectional view of the fuel-containing fluid supply nozzle ( 12 ) of the burner according to the present embodiment taken in an ejection flow direction of a fuel-containing fluid ( 11 )
  • FIG. 1B is a front view of an outlet part of the fuel-containing fluid supply nozzle ( 12 ) of FIG. 1A as viewed from the furnace ( 4 ) side, FIG.
  • FIG. 1C is a sectional view of the fuel-containing fluid supply nozzle ( 12 ) of the burner according to the conventional art taken in the ejection flow direction of the fuel-containing fluid
  • FIG. 1D is a front view of the outlet part of the fuel-containing fluid supply nozzle ( 12 ) as viewed from the furnace ( 4 ) side.
  • the ring-shaped ignition position ( 33 ) is present in a periphery of the ejection flow of circular cross section of the fuel-containing fluid ( 11 ) that is ejected from the fuel-containing fluid supply nozzle ( 12 ) of the burner.
  • the ignition position ( 33 ) is present in a periphery of the ejection flow of rectangular cross section of the fuel-containing fluid ( 11 ) that is ejected from the fuel-containing fluid supply nozzle ( 12 ) of the burner as shown in FIG. 1B .
  • a length L 2 ( FIG. 1B ) from the ignition position ( 33 ) to a central part of the ejection flow of the fuel-containing fluid ( 11 ) inside the furnace ( 4 ) in a direction perpendicular to the ejection flow of rectangular cross section of the fuel-containing fluid ( 11 ) is reduced significantly in comparison with the length L 2 ′ ( FIG. 1D ) from the ignition position ( 33 ) to the central part of the ejection flow of the fuel-containing fluid ( 11 ) in the direction perpendicular to the ejection flow of circular cross section.
  • FIG. 2 shows sectional views of the fuel-containing fluid supply nozzle ( 12 ) of the burner showing that a distance (unignited distance) L 1 ( FIG. 2A ) that a flame propagates from the ignition position ( 33 ) to the central part of the fuel ejection flow in an ejection flow direction of the fuel-containing fluid ( 11 ) from the fuel-containing fluid supply nozzle ( 12 ) in the embodiment is reduced in comparison with the unignited distance L 1 ′ ( FIG. 2B ) in the conventional art.
  • the unignited distance L 1 is reduced significantly in comparison with the unignited distance L 1 ′ of the conventional art.
  • FIG. 3 shows a structural example of a burner according to an embodiment of the present invention.
  • FIG. 3A is a sectional view taken in a direction parallel to a plane passing through a central axis of the burner and passing through a longest axis of a major axis part of an outlet part (sectional view taken on line B-B of FIG. 3B ),
  • FIG. 3B is a sectional view taken on line A-A of FIG. 3A , and
  • FIG. 3C is a front view of the outlet part of the burner as viewed from the furnace ( 4 ) side.
  • a cylindrical fuel-containing fluid flow passage ( 10 ) is connected via a connecting part ( 10 a ) of circular cross section to the fuel-containing fluid supply nozzle ( 12 ) having a rectangular cross section and has an adequate configuration for forming the ejection flow of rectangular cross section from the fuel-containing fluid supply nozzle ( 12 ) into the furnace ( 4 ). Even after the fuel-containing fluid ( 11 ) is loaded into the furnace ( 4 ), the fuel-containing fluid ( 11 ) spreads along the ejection flow directions and a cross-sectional area of the ejection flow of the fuel-containing fluid ( 11 ) expands while a flow velocity decreases, thereby effectively reducing the unignited distance L 1 shown in FIG. 2 further.
  • a combustion air sleeve ( 15 ) of rectangular cross section and a burner throat ( 16 ) of rectangular cross section are disposed in a periphery of the fuel-containing fluid supply nozzle ( 12 ).
  • FIG. 4 shows a structural example of a burner according to an embodiment of the present invention.
  • FIG. 4A is a sectional view taken in a direction parallel to a plane passing through a central axis of the burner and passing through a longest axis of a major axis part of an outlet part (sectional view taken on line B-B of FIG. 4B ),
  • FIG. 4B is a sectional view taken on line A-A of FIG. 4A , and
  • FIG. 4C is a front view of the outlet part of the burner as viewed from the furnace ( 4 ) side.
  • the cross section of the burner in the direction perpendicular to the ejection flow of the fuel-containing fluid ( 11 ) has an elliptical shape, and configurations of other parts are the same as those of the burner shown in FIG. 3 .
  • FIG. 5 shows a structural example of a burner according to an embodiment of the present invention.
  • FIG. 5A is a sectional view taken in a direction parallel to a plane passing through a central axis of the burner and passing through a longest axis of a major axis part of an outlet part (sectional view taken on line B-B of FIG. 5B )
  • FIG. 5B is a sectional view taken on line A-A of FIG. 5A
  • FIG. 5C is a front view of the outlet part of the burner as viewed from the furnace ( 4 ) side.
  • a size of the major axis part gradually increases along the flow direction of the fuel-containing fluid ( 11 ) from the fuel-containing fluid connecting part ( 10 a ) of the fuel-containing fluid supply nozzle ( 12 ) toward the outlet part
  • a size of a minor axis part gradually decreases along the direction of flow of the fuel-containing fluid ( 11 )
  • configurations of other parts are the same as those of the burner shown in FIG. 3 .
  • a characteristic of the burner structure shown in FIG. 5 is that increase of the flow velocity of the fuel-containing fluid ( 11 ) from the fuel-containing fluid connecting part ( 10 a ) toward the outlet part of the fuel-containing fluid supply nozzle ( 12 ) can be suppressed to minimize pressure loss and suppress wear of component parts inside the fuel-containing fluid supply nozzle ( 12 ).
  • FIG. 6 shows a structural example of a burner according to an embodiment of the present invention.
  • FIG. 6A is a sectional view taken in a direction parallel to a plane passing through a central axis of the burner and passing through a longest axis of a major axis part of an outlet part (sectional view taken on line B-B of FIG. 6B )
  • FIG. 6B is a sectional view taken on line A-A of FIG. 6A
  • FIG. 6C is a front view of the outlet part of the burner as viewed from the furnace ( 4 ) side.
  • fuel-containing fluid guide plates ( 19 ) are disposed so that the fuel-containing fluid ( 11 ) flowing inside the fuel-containing fluid supply nozzle ( 12 ) is uniformly supplied in directions in which the fuel-containing fluid supply nozzle ( 12 ) expands along the ejection flow direction, and configurations of other parts are the same as those of the burner shown in FIG. 5 .
  • a central guide plate ( 19 ) is disposed along the central axis and guide plates ( 19 ) at both sides that sandwich the central guide plate ( 19 ) are disposed at angles a and p with respect to a vertical section passing through the central axis.
  • the fuel-containing fluid ( 11 ) flowing inside the fuel-containing fluid supply nozzle ( 12 ) is partitioned plurally by the fuel-containing fluid guide plates ( 19 ), the fuel-containing fluid ( 11 ) is spread uniformly according to the spreading of the fuel-containing fluid supply nozzle ( 12 ) from the fuel-containing fluid connecting part ( 10 a ) toward the outlet part of the fuel-containing fluid supply nozzle ( 12 ) and can be combusted without imbalance. Also, by the fuel-containing fluid ( 11 ) being spread uniformly, the effects of suppression of localized increase of flow velocity, minimization of pressure loss, and suppression of wear of component parts are improved over those of the configuration shown in FIG. 5 .
  • FIG. 7 shows a structural example of a burner according to an embodiment of the present invention.
  • FIG. 7A is a sectional view taken in a direction parallel to a plane passing through a central axis of the burner and passing through a longest axis of a major axis part of an outlet part
  • FIG. 7B is a sectional view taken on line B-B of FIG. 7A
  • FIG. 7C is a sectional view taken on line A-A of FIG. 7A .
  • the fuel-containing fluid guide plates ( 19 ) are disposed in the same manner as in the burner shown in FIG. 6 so that the fuel-containing fluid ( 11 ) flowing inside the fuel-containing fluid supply nozzle ( 12 ) is uniformly supplied in directions in which the fuel-containing fluid supply nozzle ( 12 ) expands along the flow direction, and in the section taken on line A-A of FIG.
  • fuel-containing fluid direction changing guide plates ( 21 a ) that change the flow of the fluid ( 11 ) downward with respect to a plane along a line, passing through the central axis of the fuel-containing fluid supply nozzle ( 12 ) and extending toward the furnace ( 4 ), and passing through the longest axis of the major axis part of the outlet part are installed at the burner outlet part, and in the section taken on line B-B of FIG. 7A , fuel-containing fluid direction changing guide plates ( 21 b ) that change the flow of the fluid ( 11 ) upward with respect to the abovementioned plane are installed at the burner outlet part.
  • FIG. 8 shows a structural example of a burner according to an embodiment of the present invention.
  • FIG. 8A is a sectional view taken in a direction parallel to a plane passing through a central axis of the burner and passing through a longest axis of a major axis part of an outlet part
  • FIG. 8B is a sectional view taken on line B-B of FIG. 8A
  • FIG. 8C is a sectional view taken on line A-A of FIG. 8A .
  • the fuel-containing fluid guide plates ( 19 ) are disposed in the same manner as in the burner shown in FIG. 7 so that the fuel-containing fluid ( 11 ) flowing inside the fuel-containing fluid supply nozzle ( 12 ) is uniformly supplied in directions in which the fuel-containing fluid supply nozzle ( 12 ) expands along the flow direction, and in the section taken on line A-A of FIG.
  • fuel-containing fluid direction changing guide plates ( 21 a ) that rectify and make the flow of the fluid ( 11 ) rectilinear with respect to a plane along a line, passing through the central axis of the fuel-containing fluid supply nozzle ( 12 ) and extending toward the furnace ( 4 ), and passing through the longest axis of the major axis part of the outlet part are installed at the burner outlet part, and in the section taken on line B-B of FIG. 8A , fuel-containing fluid direction changing guide plates ( 21 b ) that change the flow of the fluid ( 11 ) upward with respect to the abovementioned plane are installed at the burner outlet part.
  • fuel-containing fluid ejection flows 20 ( 20 a, 20 b ) formed by the fuel-containing fluid supply nozzle ( 12 ) and the fuel-containing fluid guide plates ( 19 ), are formed to fuel-containing fluid ejection flows ( 20 a ) in a rectilinear direction and fuel-containing fluid ejection flows ( 20 b ) that are upwardly directed ejection flows by installation of the above-mentioned fuel-containing fluid direction changing guide plates ( 21 a, 21 b ).
  • the dispersion of the fuel-containing fluid ejection flow ( 20 ) inside the furnace ( 4 ) is promoted to maintain the effect of promoting the combustion at the wake part of the furnace ( 4 ) and provide an effect of suppressing inflow of a flame to a vicinity of the side wall of the furnace ( 4 ) to prevent ash deposition.
  • FIG. 9 shows a structural example of a burner according to an embodiment of the present invention.
  • FIG. 9A is a sectional view taken in a direction parallel to a plane passing through a central axis of the burner and passing through a longest axis of a major axis part of an outlet part
  • FIG. 9B is perspective view of the burner
  • FIG. 9C is a sectional view taken on line B-B of FIG. 9A
  • FIG. 9D is a sectional view taken on line A-A of FIG. 9A .
  • the fuel-containing fluid guide plates ( 19 ) are disposed in the same manner as in the burner shown in FIG. 7 so that the fuel-containing fluid ( 11 ) flowing inside the fuel-containing fluid supply nozzle ( 12 ) is uniformly supplied in directions in which the fuel-containing fluid supply nozzle ( 12 ) expands along the flow direction.
  • a front side of an inlet part of the fuel-containing fluid supply nozzle ( 12 ) has a parallelepiped shape, one side surface ( 12 a ) of the fuel-containing fluid supply nozzle ( 12 ) leads to the outlet of the fuel-containing fluid supply nozzle ( 12 ) while being disposed obliquely downward along the flow direction and the other side surface ( 12 b ) leads to the outlet while being disposed obliquely upward along the flow direction.
  • an obliquely downwardly directed fuel-containing fluid ejection flow ( 20 a ) is formed at a portion close to the side surface ( 12 a ) of the fuel-containing fluid supply nozzle ( 12 ) as shown in FIG. 9D
  • an obliquely upwardly directed fuel-containing fluid ejection flow ( 20 d ) is formed at a portion close to the side surface ( 12 b ) of the fuel-containing fluid supply nozzle ( 12 ) as shown in FIG. 9C .
  • a fuel-containing fluid ejection flow ( 20 b ) having an ejection flow direction intermediate the fuel-containing fluid ejection flow ( 20 a ) and the central line and a fuel-containing fluid ejection flow ( 20 c ) having an ejection flow direction intermediate the fuel-containing fluid ejection flow ( 20 d ) and the central line are formed.
  • FIG. 10 shows a structural example of a burner according to an embodiment of the present invention.
  • FIG. 10A is a sectional view taken in a direction parallel to a plane passing through a central axis of the burner and passing through a longest axis of a major axis part of an outlet part (sectional view taken on line B-B of FIG. 10B ),
  • FIG. 10B is a sectional view taken on line A-A of FIG. 10A , and
  • FIG. 10C is a front view of the outlet part of the burner as viewed from the furnace ( 4 ) side.
  • Fuel-containing fluid partitioning plates 22 perpendicular to the flow of the fuel-containing fluid ( 11 ) and partially blocking the flow, are disposed at the outlet part of the fuel-containing fluid supply nozzle ( 12 ).
  • the fuel-containing fluid ejection flow ( 20 ) is partitioned into four by the fuel-containing fluid partitioning plates ( 22 ) as shown in FIG. 11 .
  • the fuel-containing fluid ejection flow ( 20 ) increases in surface area, the radiant heating inside the furnace ( 4 ) increases, negative pressure regions ( 22 a ) are formed at the wake side of the fuel-containing fluid partitioning plates ( 22 ), and high-temperature gas in the periphery flows into the negative pressure regions ( 22 a ) as indicated by arrows in the figure.
  • FIG. 12 shows a structural example of a burner according to an embodiment of the present invention.
  • FIG. 12A is a sectional view taken in a direction parallel to a plane passing through a central axis of the burner and passing through a longest axis of a major axis part of an outlet part (sectional view taken on line B-B of FIG. 12B ),
  • FIG. 12B is a sectional view taken on line A-A of FIG. 12A , and
  • FIG. 12C is a front view of the outlet part of the burner as viewed from the furnace ( 4 ) side.
  • the fuel-containing fluid partitioning plates ( 22 ), perpendicular to the flow of the fuel-containing fluid ( 11 ) and partially blocking the flow, are disposed at the outlet parts of the fuel-containing fluid guide plates ( 19 ) at the outlet part of the fuel-containing fluid supply nozzle ( 12 ). Because the fuel-containing fluid ( 11 ) is supplied uniformly inside the fuel-containing fluid supply nozzle ( 12 ) by the fuel-containing fluid guide plates ( 19 ), the reduction of NOx and improvement in the combustion efficiency are realized more effectively.
  • FIG. 13 shows a structural example of a burner according to an embodiment of the present invention.
  • FIG. 13A is a sectional view taken in a direction parallel to a plane passing through a central axis of the burner and passing through a longest axis of a major axis part of an outlet part (sectional view taken on line B-B of FIG. 13B )
  • FIG. 13B is a sectional view taken on line A-A of FIG. 13A
  • FIG. 13C is a front view of the outlet part of the burner as viewed from the furnace ( 4 ) side.
  • a flame stabilizer ( 17 ) with an L-shaped cross section is installed at the outlet part of the fuel-containing fluid supply nozzle ( 12 ). Because a circular vortex (not shown) is formed at a wake of the flame stabilizer ( 17 ) and draws back the high-temperature combustion gas to the vicinity of the flame stabilizer ( 17 ), the configuration contributes to early ignition of the fuel and promotes combustion in the reducing region in the vicinity of the burner to effectively contribute to reduction of the NOx concentration in the combustion gas and improvement in the combustion efficiency.
  • FIG. 14 shows a structural example of a burner according to an embodiment of the present invention.
  • FIG. 14A is a sectional view taken in a direction parallel to a plane passing through a central axis of the burner and passing through a longest axis of a major axis part of an outlet part (sectional view taken on line B-B of FIG. 14B ),
  • FIG. 14B is a sectional view taken on line A-A of FIG. 14A , and
  • FIG. 14C is a front view of the outlet part of the burner as viewed from the furnace ( 4 ) side.
  • a secondary air guide plate ( 17 a ) that outwardly spreads ejection directions of a secondary air is installed at a front end of the flame stabilizer ( 17 ) of L-shaped cross section shown in FIG. 14 .
  • the vortex flow (not shown) at the wake of the flame stabilizer ( 17 ) is enlarged, a recirculation amount of the high-temperature gas is increased, ignition of the fuel is quickened further, and combustion in the reducing region in the vicinity of the burner is promoted to effectively contribute to reduction of the NOx concentration in the combustion gas and improvement in the combustion efficiency.
  • FIG. 15 shows a structural example of a burner according to an embodiment of the present invention.
  • FIG. 15A is a sectional view taken in a direction parallel to a plane passing through a central axis of the burner and passing through a longest axis of a major axis part of an outlet part (sectional view taken on line B-B of FIG. 15B ),
  • FIG. 15B is a sectional view taken on line A-A of FIG. 15A , and
  • FIG. 15C is a front view of the outlet part of the burner as viewed from the furnace ( 4 ) side.
  • FIG. 16 shows a structural example of a burner according to an embodiment of the present invention.
  • FIG. 16A is a sectional view taken in a direction parallel to a plane passing through a central axis of the burner and passing through a longest axis of a major axis part of an outlet part (sectional view taken on line B-B of FIG. 16B ),
  • FIG. 16B is a sectional view taken on line A-A of FIG. 16A , and
  • FIG. 16C is a front view of the outlet part of the burner as viewed from the furnace ( 4 ) side.
  • a fuel-containing fluid condenser ( 23 ) combining a triangular prism gradually increasing in cross-sectional area from an upstream side and an oppositely directed triangular prism gradually decreasing in cross-sectional area at a downstream side, is installed inside the fuel-containing fluid supply nozzle ( 12 ).
  • the fuel in the vicinity of the flame stabilizer ( 17 ) is condensed by the fuel-containing fluid condenser ( 23 ) and this contributes to early ignition of the fuel, promotes combustion in the reducing region near the burner, and thereby effectively contributes to reduction of the NOx concentration in the combustion gas and improvement in the combustion efficiency.
  • FIG. 17 shows a structural example of a burner according to an embodiment of the present invention.
  • FIG. 17A is a sectional view taken in a direction parallel to a plane passing through a central axis of the burner in a direction parallel to and passing through a longest axis of a major axis part of an outlet part (sectional view taken on line B-B of FIG. 17B )
  • FIG. 17B is a sectional view taken on line A-A of FIG. 17A
  • FIG. 17C is a front view of the outlet part of the burner as viewed from the furnace ( 4 ) side.
  • delamination is suppressed by making an angular variation around the condenser ( 23 ′) small and a fuel condensing effect is thereby promoted to heighten the NOx reducing effect and improve the combustion efficiency.
  • FIG. 18 shows a structural example of a burner according to an embodiment of the present invention.
  • FIG. 18A is a sectional view parallel to a fuel-containing fluid supply nozzle ( 12 ) surface formed through a long edge of an outlet part of the nozzle ( 12 ) (sectional view taken on line B-B of FIG. 18B ),
  • FIG. 18B is a sectional view taken on line A-A of FIG. 18A , and
  • FIG. 18C is a front view of the outlet part of the burner as viewed from the furnace ( 4 ) side.
  • a dam-like fluid distribution plate ( 24 ) is disposed at an inlet part of the fuel-containing fluid supply nozzle ( 12 ).
  • the fuel-containing fluid ( 11 ) collides once with an upstream side of the dam-like fluid distribution plate ( 24 ) and, after being dispersed uniformly in the direction of a long edge of the fuel-containing fluid supply nozzle ( 12 ), is guided uniformly into the four flow passages partitioned by the fuel-containing fluid guide plates ( 19 ) inside the fuel-containing fluid supply nozzle ( 12 ) and supplied into the furnace ( 4 ) while being maintained in a uniform state.
  • FIG. 19 shows an example where an oil supply nozzle ( 41 ) is installed at a central part of the fuel-containing fluid supply nozzle ( 12 ).
  • FIG. 19A is a sectional view taken in a direction parallel to a plane passing through a central axis of the burner and passing through a longest axis of a major axis part of an outlet part (sectional view taken on line B-B of FIG. 19B ),
  • FIG. 19B is a sectional view taken on line A-A of FIG. 19A
  • FIG. 19C is a front view of the outlet part of the burner as viewed from the furnace ( 4 ) side.
  • FIG. 20 shows an example where a gas ejection part, connected from a gas introduction tube ( 42 ) to gas supply nozzles ( 44 ) via a horizontal tube ( 43 ), is installed in a periphery of the flame stabilizer ( 17 ).
  • FIG. 20A is a sectional view taken in a direction parallel to a plane passing through a central axis of the burner and passing through a longest axis of a major axis part of an outlet part (sectional view taken on line B-B of FIG. 20B ),
  • FIG. 20B is a sectional view taken on line A-A of FIG. 20A , and
  • FIG. 20C is a front view of the outlet part of the burner as viewed from the furnace ( 4 ) side.
  • FIG. 21 shows, for a burner structure, a front view as viewed from the furnace ( 4 ) side ( FIG. 21A ) and a plan view ( FIG. 21B ) of the fuel-containing fluid supply nozzle ( 12 ), with which the cross-sectional shape perpendicular to the flow of the fuel-containing fluid ( 11 ) flowing inside the fuel-containing fluid supply nozzle ( 12 ) of the burner is rectangular, in a case where the fuel-containing fluid supply nozzle ( 12 ) is positioned with its long edge side directed in an up/down direction.
  • the fuel-containing fluid ejection flows ( 20 a, 20 b ) from the fuel-containing fluid supply nozzle ( 12 ) shown in FIG. 21 are formed obliquely toward mutually opposite sides in the horizontal direction to the left and right with respect to a plane perpendicular to the furnace wall surface in upper and lower directions of the long edge side of the nozzle ( 12 ).
  • the forming of the present fuel-containing fluid ejection flows is achieved by applying the burner structure of FIG. 7 or FIG. 9 .
  • FIG. 22 shows, for a burner structure, a front view as viewed from the furnace ( 4 ) side ( FIG. 22A ) and a plan view ( FIG. 22B ) of the fuel-containing fluid supply nozzle ( 12 ), with which the cross-sectional shape perpendicular to the flow of the fuel-containing fluid ( 11 ) flowing inside the fuel-containing fluid supply nozzle ( 12 ) of the burner is rectangular, in a case where the fuel-containing fluid supply nozzle ( 12 ) is positioned with its long edge side directed in an up/down direction.
  • one fuel-containing fluid ejection flow ( 20 b ) from the fuel-containing fluid supply nozzle ( 12 ) shown in FIG. 22 is formed obliquely to the horizontal direction with respect to a plane perpendicular to the furnace wall surface in upper and lower directions of the long edge side of the nozzle ( 12 ) and the other fuel-containing fluid ejection flow ( 20 c ) is formed perpendicular to the furnace wall surface.
  • the forming of the present fuel-containing fluid ejection flows is achieved by applying the burner structure of FIG. 8 .
  • FIG. 23 shows an example where a plurality of the fuel-containing fluid supply nozzles ( 12 ), shown in FIG. 21 , are positioned in three stages in the up/down direction and four columns in the horizontal direction on a single furnace wall surface.
  • Fuel-containing fluid supply nozzles ( 12 ) forming ejection flows ( 20 a, 20 b ) in the same directions as the nozzles ( 12 ) shown in FIG. 21 are disposed at a right half of the single furnace wall, and fuel-containing fluid supply nozzles ( 12 ) forming ejection flows ( 20 a, 20 b ) at mirror symmetric positions with respect to the fuel-containing fluid supply nozzles ( 12 ) shown in FIG. 21 are disposed at a left half of the furnace wall.
  • FIG. 24 shows an example where a plurality of the fuel-containing fluid supply nozzles ( 12 ) are positioned in three stages in the up/down direction and four columns in the horizontal direction on a single furnace wall surface, with the fuel-containing fluid supply nozzles ( 12 ) shown in FIG. 22 being disposed mirror symmetrically at respective end columns at the left and right sides and the fuel-containing fluid supply nozzles ( 12 ) shown in FIG. 21 being disposed mirror symmetrically at two central columns.
  • the dispersion within the furnace ( 4 ) is promoted to maintain the effect of promoting the combustion at the wake part of the furnace ( 4 ) while providing the effect of suppressing inflow of the flame to the vicinity of the side wall of the furnace ( 4 ) to prevent ash deposition.
  • FIG. 25 shows an example where the fuel-containing fluid supply nozzles ( 12 ) that are all the same and form the fuel-containing fluid ejection flows ( 20 a, 20 b ) shown in FIG. 21 are disposed as the fuel-containing fluid supply nozzles ( 12 ) of all of the burners on the single furnace wall.
  • the present embodiment provides a configuration with which collision of the fuel-containing fluid ejection flows ( 20 a, 20 b ) can be avoided, especially in a furnace ( 4 ) of small capacity, and localized concentration of fuel is suppressed to effectively reduce the NOx concentration in the combustion gas and improve the combustion efficiency.
  • FIG. 26 is a plan view of a furnace wall of a boiler in which burners according to an embodiment of the present invention are disposed.
  • a boiler having spiral water wall tubes ( 25 ) on the furnace wall rectangular openings ( 26 ) are installed and the various burners described as the embodiments of the present invention are mounted along an arrangement of the water wall tubes ( 25 ) that is oblique with respect to the horizontal direction.
  • a combustion equipment configured from the respective embodiments of the present invention has a characteristic of enabling the combustion space to be utilized effectively because the fuel-containing fluid ejection flows ( 20 ) spread inside the furnace ( 4 ), and with the configuration shown in FIG. 26 , because the fuel-containing fluid ejection flows ( 20 a, 20 b ) spread in the horizontal (width) direction of the furnace ( 4 ), a distribution of the fuel-containing fluid ( 11 ) in the horizontal (width) direction of the furnace ( 4 ) is made uniform and the practical furnace retention time is made even longer, thereby effectively contributing to the reduction of NOx concentration in the combustion gas and improvement in combustion efficiency.
  • FIG. 27 is a plan view of a furnace wall of a boiler in which burners according to an embodiment of the present invention are disposed.
  • a boiler having water wall tubes ( 25 ) extending in the vertical direction on the furnace wall rectangular openings ( 26 ) are installed and the various burners described as the embodiments of the present invention are mounted along the arrangement of the water wall tubes ( 25 ).
  • the openings ( 26 ) By disposing the openings ( 26 ) along the water wall tubes ( 25 ), the number of the water wall tubes ( 25 ) necessary for forming the openings ( 26 ) can be minimized to improve economy.
  • An oil or a gas is generally used as an auxiliary fuel in a burner, and even when supply nozzles for such fuels are installed at apart of the burners according to the embodiments of the present invention, the characteristics and effects of the burners according to the embodiments of the present invention are maintained.
  • the present invention is high in future industrial applicability.

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US12/442,745 2006-09-27 2007-03-27 Burner, and combustion equipment and boiler comprising burner Abandoned US20100064986A1 (en)

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JP2006263336 2006-09-27
PCT/JP2007/056311 WO2008038426A1 (fr) 2006-09-27 2007-03-27 Brûleur, et équipement de combustion et chaudière comprenant un brûleur

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100162930A1 (en) * 2007-09-25 2010-07-01 Babcock-Hitachi Kabushiki Kaisha Solid-fuel burner, combustion device using solid-fuel burner, and method of operating the combustion device
US20110053102A1 (en) * 2008-04-10 2011-03-03 Babcock-Hitachi Kabushiki Kaisha Solid fuel burner, combustion apparatus using solid fuel burner, and method of operating the combustion apparatus
US20120152158A1 (en) * 2009-12-17 2012-06-21 Mitsubishi Heavy Industries, Ltd. Solid-fuel-fired burner and solid-fuel-fired boiler
US20140352582A1 (en) * 2011-12-26 2014-12-04 Kawasaki Jukogyo Kabushiki Kaisha Biomass combustion burner, biomass-mixed fired boiler, and biomass fuel combustion method
WO2014168881A3 (en) * 2013-04-11 2015-06-18 Babcock & Wilcox Power Generation Group, Inc. Dual phase fuel feeder for boilers
US20150241058A1 (en) * 2012-08-14 2015-08-27 Mitsubishi Hitachi Power Systems, Ltd. Solid-fuel burner
US20160356489A1 (en) * 2011-04-01 2016-12-08 Mitsubishi Heavy Industries, Ltd. Combustion burner, solid-fuel-combustion burner, solid-fuel-combustion boiler, boiler, and method for operating boiler
US9869469B2 (en) 2009-12-22 2018-01-16 Mitsubishi Heavy Industries, Ltd. Combustion burner and boiler including the same
CN109405276A (zh) * 2018-09-30 2019-03-01 农业部规划设计研究院 一种秸秆捆烧锅炉清洁供暖系统
US20190113225A1 (en) * 2016-05-11 2019-04-18 Dynamis Engenharia E Comércio Ltda. Method to Enhance Burner Efficiency and Burner
US10458645B2 (en) 2015-03-31 2019-10-29 Mitsubishi Hitachi Power Systems, Ltd. Combustion burner and boiler provided with same
US10591154B2 (en) 2015-03-31 2020-03-17 Mitsubishi Hitachi Power Systems, Ltd. Combustion burner and boiler
US10677457B2 (en) 2015-09-11 2020-06-09 Mitsubishi Hitachi Power Systems, Ltd. Combustion burner and boiler equipped with the same
US11029025B2 (en) 2019-08-14 2021-06-08 Taiheiyo Cement Corporation Combustible waste injection device and method for operating the same
US11248785B2 (en) 2017-07-31 2022-02-15 General Electric Technology Gmbh Coal nozzle assembly for a steam generation apparatus
US11465238B2 (en) * 2019-02-13 2022-10-11 Bystronic Laser Ag Gas guide, laser cutting head and laser cutting machine
US11608981B1 (en) * 2021-08-31 2023-03-21 R-V Industries, Inc. Nozzle for feeding combustion media into a furnace

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5268093B2 (ja) * 2008-07-04 2013-08-21 一般財団法人電力中央研究所 粉体の気流搬送装置及びこれを有するガス化設備
JP5490924B2 (ja) 2011-01-21 2014-05-14 バブコック日立株式会社 固体燃料バーナおよび前記バーナを用いる燃焼装置
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JP5768433B2 (ja) * 2011-03-25 2015-08-26 宇部興産株式会社 セメント焼成用バーナ
WO2014027611A1 (ja) * 2012-08-14 2014-02-20 バブコック日立株式会社 固体燃料バーナと該固体燃料バーナを備えた燃焼装置の運転方法
JP5797238B2 (ja) * 2013-08-05 2015-10-21 三菱日立パワーシステムズ株式会社 燃料バーナ及び旋回燃焼ボイラ
JP7139095B2 (ja) * 2017-02-17 2022-09-20 三菱重工業株式会社 ボイラ
JP6879771B2 (ja) * 2017-02-17 2021-06-02 三菱パワー株式会社 燃焼バーナ及びこれを備えたボイラ
EP3438529B1 (en) * 2017-07-31 2020-04-22 General Electric Technology GmbH Coal nozzle assembly comprising two flow channels

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4520739A (en) * 1982-07-12 1985-06-04 Combustion Engineering, Inc. Nozzle tip for pulverized coal burner
US5545031A (en) * 1994-12-30 1996-08-13 Combustion Tec, Inc. Method and apparatus for injecting fuel and oxidant into a combustion burner
US5829367A (en) * 1994-06-17 1998-11-03 Mitsubishi Jukogyo Kabushiki Kaisha Pulverized fuel combustion burner having a flame maintaining plate at a tip end portion of a pulverized fuel conduit
US6889619B2 (en) * 2001-11-16 2005-05-10 Hitachi, Ltd. Solid fuel burner, burning method using the same, combustion apparatus and method of operating the combustion apparatus
US20060000467A1 (en) * 2004-06-30 2006-01-05 Hibshman Joell R Ii Gas cooking burner with enhanced air entrainment and system and method incorporating same

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4634054A (en) * 1983-04-22 1987-01-06 Combustion Engineering, Inc. Split nozzle tip for pulverized coal burner
JP2740201B2 (ja) 1988-09-05 1998-04-15 バブコツク日立株式会社 微粉炭バーナ
US5240409A (en) * 1992-04-10 1993-08-31 Institute Of Gas Technology Premixed fuel/air burners
GB9322016D0 (en) * 1993-10-26 1993-12-15 Rolls Royce Power Eng Improvements in or relating to solid fuel burners
US5392720A (en) * 1994-06-07 1995-02-28 Riley Stoker Corporation Flame retaining nozzle tip
JP3021305B2 (ja) * 1995-01-30 2000-03-15 三菱重工業株式会社 微粉状燃料燃焼バーナ
JPH08226615A (ja) 1995-02-22 1996-09-03 Mitsubishi Heavy Ind Ltd 微粉炭焚きバーナ
CN2253800Y (zh) * 1995-08-18 1997-05-07 哈尔滨锅炉有限责任公司 浓缩式自稳煤粉燃烧器
JP3344694B2 (ja) * 1997-07-24 2002-11-11 株式会社日立製作所 微粉炭燃焼バーナ
CN2319694Y (zh) * 1997-10-17 1999-05-19 清华大学 可调式浓淡煤粉燃烧器
JP3686250B2 (ja) 1998-03-26 2005-08-24 三菱重工業株式会社 微粉炭バーナ
JP3716096B2 (ja) * 1998-04-02 2005-11-16 三菱重工業株式会社 微粉炭セパレータ装置
JP3986182B2 (ja) * 1998-10-27 2007-10-03 株式会社日立製作所 微粉炭燃焼バーナおよびそれを備えた燃焼装置
JP2000234704A (ja) * 1999-02-16 2000-08-29 Babcock Hitachi Kk 微粉炭燃焼装置
JP3924089B2 (ja) * 1999-04-28 2007-06-06 株式会社日立製作所 微粉炭バーナ及び微粉炭バーナを用いた燃焼装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4520739A (en) * 1982-07-12 1985-06-04 Combustion Engineering, Inc. Nozzle tip for pulverized coal burner
US5829367A (en) * 1994-06-17 1998-11-03 Mitsubishi Jukogyo Kabushiki Kaisha Pulverized fuel combustion burner having a flame maintaining plate at a tip end portion of a pulverized fuel conduit
US5545031A (en) * 1994-12-30 1996-08-13 Combustion Tec, Inc. Method and apparatus for injecting fuel and oxidant into a combustion burner
US6889619B2 (en) * 2001-11-16 2005-05-10 Hitachi, Ltd. Solid fuel burner, burning method using the same, combustion apparatus and method of operating the combustion apparatus
US20060000467A1 (en) * 2004-06-30 2006-01-05 Hibshman Joell R Ii Gas cooking burner with enhanced air entrainment and system and method incorporating same

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100162930A1 (en) * 2007-09-25 2010-07-01 Babcock-Hitachi Kabushiki Kaisha Solid-fuel burner, combustion device using solid-fuel burner, and method of operating the combustion device
US20110053102A1 (en) * 2008-04-10 2011-03-03 Babcock-Hitachi Kabushiki Kaisha Solid fuel burner, combustion apparatus using solid fuel burner, and method of operating the combustion apparatus
US20120152158A1 (en) * 2009-12-17 2012-06-21 Mitsubishi Heavy Industries, Ltd. Solid-fuel-fired burner and solid-fuel-fired boiler
US10281142B2 (en) * 2009-12-17 2019-05-07 Mitsubishi Heavy Industries, Ltd. Solid-fuel-fired burner and solid-fuel-fired boiler
US9869469B2 (en) 2009-12-22 2018-01-16 Mitsubishi Heavy Industries, Ltd. Combustion burner and boiler including the same
US20160356489A1 (en) * 2011-04-01 2016-12-08 Mitsubishi Heavy Industries, Ltd. Combustion burner, solid-fuel-combustion burner, solid-fuel-combustion boiler, boiler, and method for operating boiler
US20170045221A1 (en) * 2011-04-01 2017-02-16 Mitsubishi Heavy Industries, Ltd. Combustion burner, solid-fuel-combustion burner, solid-fuel-combustion boiler, boiler, and method for operating boiler
US20140352582A1 (en) * 2011-12-26 2014-12-04 Kawasaki Jukogyo Kabushiki Kaisha Biomass combustion burner, biomass-mixed fired boiler, and biomass fuel combustion method
US10309647B2 (en) * 2011-12-26 2019-06-04 Kawasaki Jukogyo Kabushiki Kaisha Biomass combustion burner, biomass-mixed fired boiler, and biomass fuel combustion method
US20150241058A1 (en) * 2012-08-14 2015-08-27 Mitsubishi Hitachi Power Systems, Ltd. Solid-fuel burner
US9599335B2 (en) * 2012-08-14 2017-03-21 Mitsubishi Hitachi Power Systems, Ltd. Solid-fuel burner
AU2013303566B2 (en) * 2012-08-14 2015-10-01 Mitsubishi Power, Ltd. Solid-fuel burner
WO2014168881A3 (en) * 2013-04-11 2015-06-18 Babcock & Wilcox Power Generation Group, Inc. Dual phase fuel feeder for boilers
US10458645B2 (en) 2015-03-31 2019-10-29 Mitsubishi Hitachi Power Systems, Ltd. Combustion burner and boiler provided with same
US10591154B2 (en) 2015-03-31 2020-03-17 Mitsubishi Hitachi Power Systems, Ltd. Combustion burner and boiler
US10677457B2 (en) 2015-09-11 2020-06-09 Mitsubishi Hitachi Power Systems, Ltd. Combustion burner and boiler equipped with the same
US20190113225A1 (en) * 2016-05-11 2019-04-18 Dynamis Engenharia E Comércio Ltda. Method to Enhance Burner Efficiency and Burner
US11248785B2 (en) 2017-07-31 2022-02-15 General Electric Technology Gmbh Coal nozzle assembly for a steam generation apparatus
CN109405276A (zh) * 2018-09-30 2019-03-01 农业部规划设计研究院 一种秸秆捆烧锅炉清洁供暖系统
US11465238B2 (en) * 2019-02-13 2022-10-11 Bystronic Laser Ag Gas guide, laser cutting head and laser cutting machine
US11029025B2 (en) 2019-08-14 2021-06-08 Taiheiyo Cement Corporation Combustible waste injection device and method for operating the same
US11608981B1 (en) * 2021-08-31 2023-03-21 R-V Industries, Inc. Nozzle for feeding combustion media into a furnace

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KR20090080506A (ko) 2009-07-24
US20140116359A1 (en) 2014-05-01
CN101542202A (zh) 2009-09-23
CA2664769C (en) 2013-03-19
KR101285447B1 (ko) 2013-07-12
JP4896143B2 (ja) 2012-03-14
AU2007301377B2 (en) 2011-02-03
JPWO2008038426A1 (ja) 2010-01-28
CA2664769A1 (en) 2008-04-03
WO2008038426A1 (fr) 2008-04-03
AU2007301377A1 (en) 2008-04-03
EP2068077A4 (en) 2016-10-12
EP2068077A1 (en) 2009-06-10
CN101542202B (zh) 2011-05-04

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