WO2019146154A1 - Brûleur à combustion, dispositif de combustion et chaudière - Google Patents

Brûleur à combustion, dispositif de combustion et chaudière Download PDF

Info

Publication number
WO2019146154A1
WO2019146154A1 PCT/JP2018/033436 JP2018033436W WO2019146154A1 WO 2019146154 A1 WO2019146154 A1 WO 2019146154A1 JP 2018033436 W JP2018033436 W JP 2018033436W WO 2019146154 A1 WO2019146154 A1 WO 2019146154A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel gas
flame
flame stabilizing
stabilizing member
fuel
Prior art date
Application number
PCT/JP2018/033436
Other languages
English (en)
Japanese (ja)
Inventor
史也 山根
啓吾 松本
竜平 高島
幸洋 冨永
泰仁 大西
田中　隆一郎
川元　昇
岩田　隆
慎一 関口
Original Assignee
三菱日立パワーシステムズ株式会社
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 三菱日立パワーシステムズ株式会社 filed Critical 三菱日立パワーシステムズ株式会社
Priority to CN201880086613.8A priority Critical patent/CN111602005B/zh
Publication of WO2019146154A1 publication Critical patent/WO2019146154A1/fr

Links

Images

Classifications

    • 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
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • F23D14/74—Preventing flame lift-off

Definitions

  • the present invention relates to a combustion burner which mixes and burns fuel and air, a combustion device which forms a flame flow by the combustion burner, and a boiler which generates steam by combustion gas generated by the combustion device.
  • the conventional boiler has a hollow shape and has a vertically installed furnace, and a plurality of combustion burners are arranged circumferentially and vertically on the furnace wall. And a flue is connected with the upper part of this furnace, and the heat exchanger for collecting the heat of exhaust gas and producing steam is arranged in this flue.
  • the combustion burner is supplied with a mixture of pulverized fuel and pulverized primary fuel such as coal, and is supplied with high temperature secondary air, and this mixture and the secondary air are blown into the furnace. Form a flame.
  • Patent Document 1 As a combustion burner applied to such a boiler, there is, for example, one described in Patent Document 1 below.
  • the combustion burner described in Patent Document 1 is provided with a pulverized coal burner, a coal primary port, a coal secondary port, and a split member, and the split member collides with the pulverized coal concentrated stream to be stable in a wide load range. Enables low NOx combustion.
  • some embodiments of the present invention aim to improve the workability of maintenance work for a fuel nozzle.
  • a combustion burner comprises a fuel nozzle for spouting a fuel gas in which fuel and air are mixed, a combustion air nozzle for spouting air from the outside of the fuel nozzle, and a spout of the fuel nozzle
  • a first flame stabilizing member disposed on the upstream side of the fuel gas ejection direction from the opening to widen the fuel gas ejection direction, and the fuel gas ejection direction downstream of the first flame holding member and the first flame stabilizing member
  • a second flame holding member disposed adjacent to the flame holding member to widen the jet direction of the fuel gas, wherein at least one of the first flame holding member and the second flame holding member is of fuel gas. It is characterized by having only a widening portion which widens toward the downstream side in the flow direction.
  • At least one of the first flame stabilizing member and the second flame stabilizing member can be miniaturized, and a working space is secured in the fuel nozzle. Therefore, maintenance work such as cleaning, repair, and replacement of the flame stabilizing member can be performed using this work space portion, and the workability of the maintenance work of the fuel nozzle can be improved.
  • the first flame stabilizing member includes only a first widening portion that widens toward the downstream side of the flow direction of the fuel gas
  • the second flame stabilizing member The member is characterized by having a second widening portion which widens toward the downstream side in the flow direction of the fuel gas, and a second flat portion connected to the upstream side in the flow direction of the fuel gas from the second widening portion.
  • the working space portion can be secured inside the fuel nozzle by forming the first flame stabilizing member with only the first widening portion. Therefore, the flame stabilizing member can be accessed from the base end side of the fuel nozzle through the working space, and maintenance work such as cleaning, repair, and replacement of the flame stabilizing member can be easily performed.
  • the first flame stabilizing member is a first widening portion that widens toward the downstream side of the flow direction of the fuel gas, and a fuel gas from the first widening portion And a first flat portion connected to the upstream side in the flow direction, and the second flame stabilizing member has only a second widening portion that widens toward the downstream side in the flow direction of the fuel gas.
  • the first and second flame stabilizing members can be accessed from the base end side of the fuel nozzle through the working space portion. it can. Therefore, maintenance work such as cleaning, repair and replacement of the flame stabilizing member can be easily performed.
  • a plurality of the first flame stabilizing members are provided at predetermined intervals in the horizontal direction or the vertical direction, and the second flame stabilizing members are the first flame retaining members.
  • a predetermined spacing is provided on both sides of the flame member on the inner wall side of the fuel nozzle, and a third flame holding member is disposed between the plurality of first flame holding members, and the third flame holding member is a fuel It is characterized in that only the third widening portion which widens toward the downstream side in the gas flow direction is provided.
  • first and second flame stabilizing members can be accessed from the central portion through the working space portion from the proximal end side of the fuel nozzle. Therefore, maintenance work such as cleaning, repair and replacement of the flame stabilizing member can be easily performed.
  • the first flame stabilizing member includes only a first widening portion that widens toward the downstream side of the flow direction of the fuel gas, and the second flame stabilizing member The member is characterized by having only the second widening portion which widens toward the downstream side in the flow direction of the fuel gas.
  • the first and second flame stabilizing members can be formed from the base end side of the fuel nozzle through the working space portion. It can be accessed. Therefore, maintenance work such as cleaning, repair and replacement of the flame stabilizing member can be easily performed.
  • the second flame stabilizing member is disposed on both sides in the widthwise direction of the first flame stabilizing member, and the first flame stabilizing member is configured to eject a fuel gas.
  • the first widening portion which widens the direction in two directions is provided, and the second flame stabilizing member disposed on the inner wall surface side of the fuel nozzle has a jet direction of fuel gas only on the axial center side of the fuel nozzle. It is characterized in that the second widening portion which widens is provided.
  • the fuel gas spreads in at least two directions by the first flame stabilizing member to form the recirculation region, and spreads only to the first flame stabilizing member side by the second flame stabilizing member to form the recirculation region
  • the external flame holding in the fuel nozzle can be suppressed, and the amount of NOx generation can be reduced.
  • a plurality of the combustion burners are disposed circumferentially at predetermined intervals to form a flame swirl flow.
  • the flame stabilizing member in each combustion burner, can be accessed from the base end side of the fuel nozzle through the working space, and maintenance work such as cleaning, repair, replacement of the flame stabilizing member can be performed. It can be easily implemented.
  • a boiler according to at least one embodiment of the present invention is characterized by including a furnace having a hollow shape and installed along a vertical direction, and the combustion device.
  • the flame holding member can be accessed from the base end side of the fuel nozzle through the working space, and maintenance such as cleaning, repair, replacement of the flame holding member Work can be easily carried out.
  • the workability of the maintenance operation of the fuel nozzle can be improved.
  • FIG. 1 is a front view showing the configuration of an embodiment of a combustion burner according to some embodiments.
  • FIG. 2 is a horizontal sectional view (II-II sectional view of FIG. 1) showing the configuration of one embodiment of the combustion burner according to some embodiments.
  • the combustion burner 21 is provided with a fuel nozzle 61, a combustion air nozzle 62, and a secondary air nozzle 63 from the center side, and the flame holding in the fuel nozzle 61.
  • a vessel 64 is provided.
  • the fuel nozzle 61 is capable of spouting a pulverized fuel mixture (hereinafter referred to as fuel gas) 301 in which pulverized coal (solid fuel) and transport air (primary air) are mixed.
  • the combustion air nozzle 62 is disposed outside the fuel nozzle 61, and can eject part of the combustion air (air for fuel gas combustion) 302 to the outer peripheral side of the fuel gas 301 ejected from the fuel nozzle 61. is there.
  • the secondary air nozzle 63 is disposed outside the combustion air nozzle 62, and a part of the combustion air (hereinafter, secondary air) on the outer peripheral side of the fuel gas combustion air 302 jetted from the combustion air nozzle 62 It is possible to spout 303.
  • the flame holder 64 is disposed inside the fuel nozzle 61 and at the tip of the fuel nozzle 61, that is, on the downstream side in the flow direction of the fuel gas 301, and thus for ignition and flame holding of the fuel gas 301. It functions as a member.
  • the flame stabilizer 64 is composed of two first flame stabilizing members 71, two second flame stabilizing members 72, and one third flame stabilizing member 73.
  • the first flame stabilizing member 71, the second flame stabilizing member 72, and the third flame stabilizing member 73 are disposed along the flow direction of the fuel gas 301 and along the vertical direction, and at predetermined intervals in the horizontal direction. It is arranged.
  • the first flame stabilizing member 71 is a tip end portion of the fuel nozzle 61, and both sides in the radial direction (in the fuel nozzle 61) with respect to a center line O along the ejection direction of the fuel gas 301 (center line of the fuel nozzle 61). It is disposed on the wall surface 61a side and spaced from the inner wall surface 61a of the fuel nozzle 61 by a predetermined distance (a gap), and has a plate shape along the vertical direction and along the ejection direction of the fuel gas 301.
  • the second flame stabilizing member 72 is a tip end portion of the fuel nozzle 61, and has a predetermined interval (a gap) on both sides (the inner wall surface 61a side of the fuel nozzle 61) in the horizontal direction with respect to each first flame stabilizing member 71. And a predetermined interval (space) from the inner wall surface 61a of the fuel nozzle 61, and has a plate shape along the vertical direction and along the ejection direction of the fuel gas 301.
  • the third flame stabilizing member 73 is a tip end portion of the fuel nozzle 61, and on the center line O (center line of the fuel nozzle 61) along the ejection direction of the fuel gas 301, and from each first flame stabilizing member 71 It is disposed at a predetermined interval (gap), and has a plate shape along the vertical direction and along the ejection direction of the fuel gas 301.
  • the fuel nozzle 61 and the combustion air nozzle 62 have an elongated tubular structure.
  • the fuel nozzle 61 forms a fuel gas flow path P1 extending in the longitudinal direction and having the same flow path cross-sectional shape by four flat inner wall surfaces 61a, and has a rectangular shape at the tip end (downstream end).
  • the opening 61 b of the The combustion air nozzle 62 extends in the longitudinal direction by the four flat outer wall surfaces 61 c of the fuel nozzle 61 and the four flat inner wall surfaces 62 a so as to have the same flow channel cross-sectional shape P 2
  • a rectangular ring-shaped opening 62b is provided at the tip (downstream end). Therefore, the fuel nozzle 61 and the combustion air nozzle 62 have a double tubular structure.
  • the secondary air nozzle 63 has an elongated tubular structure disposed outside the fuel nozzle 61 and the combustion air nozzle 62.
  • the secondary air nozzle 63 has a tubular structure having four rectangular cross-sectional shapes, and is a secondary air nozzle main body 63a, 63b, disposed independently above, below, to the left, to the right of the combustion air nozzle 62. 63c and 63d and is disposed outside the combustion air nozzle 62 with a predetermined gap.
  • the secondary air nozzles 63 extend in the longitudinal direction by the four secondary air nozzle bodies 63a, 63b, 63c, 63d, and have four secondary air flow paths P31, P32, P33 having the same flow passage cross sectional shape. , P34, and a rectangular ring-shaped opening 63e is provided at the tip (downstream end).
  • the shapes of the fuel nozzle 61 and the combustion air nozzle 62 are not limited to square, and may be rectangular. In this case, the corner may be curved.
  • the strength of the nozzle can be improved by forming a tubular structure in which the corners are curved. Furthermore, it may be a cylinder.
  • the opening 62b of the combustion air nozzle 62 (combustion air flow path P2) is disposed outside the opening 61b of the fuel nozzle 61 (fuel gas flow path P1), and this combustion air nozzle 62 (for combustion An opening 63e of the secondary air nozzle 63 (secondary air flow path P3) is disposed at a predetermined interval outside the opening 62b of the air flow path P2).
  • the fuel nozzle 61, the combustion air nozzle 62, and the secondary air nozzle 63 are arranged such that the openings 61b, 62b, and 63e are aligned at the same position in the flow direction of the fuel gas 301 and the air.
  • the secondary air nozzle 63 may be disposed in a rectangular shape as a double tubular structure outside the combustion air nozzle 62 without being configured by the four secondary air nozzle bodies 63a, 63b, 63c, 63d. Good. Further, although the secondary air nozzle 63 is configured by the secondary air nozzle main bodies 63a, 63b, 63c, 63d, only the upper and lower secondary air nozzle main bodies 63a, 63b are used, and the left and right secondary air nozzle main bodies 63c, 63d You may leave it alone. Furthermore, the secondary air nozzle 63 may adjust the ejection amount of the secondary air 303 by providing a damper opening degree adjustment mechanism or the like in each of the secondary air nozzle bodies 63a, 63b, 63c, 63d.
  • the first flame stabilizing member 71 has a first widening portion 82 whose width is expanded toward the downstream side of the flow direction of the fuel gas 301 in a cross-sectional shape (FIG. 2) broken along the horizontal direction.
  • the 1 widening portion 82 has a triangular prism shape.
  • the first wide part 82 has a horizontal cross section in the form of a substantially isosceles triangle, and is inclined inward in the width direction (the center line O side of the fuel nozzle 61) and the outside in the width direction (fuel It has a second guide surface 82b inclined to the inner wall surface 61a side of the nozzle 61, and an end surface 82c orthogonal to the flow direction of the fuel gas 301 on the front end side.
  • the flow of the fuel gas 301 is separated at the corner formed by the guide surfaces 82a and 82b and the end surface 82c.
  • the width of the first widening portion 82 is constant along the vertical direction, but the width may be different.
  • the first guide surface 82a, the second guide surface 82b, and the end surface 82c are preferably flat surfaces, but may be surfaces bent or curved in a concave or convex shape.
  • the second flame stabilizing member 72 has a second flat portion 83 having a constant width and a front end portion of the second flat portion 83 (a flow of the fuel gas 301) in a sectional shape (FIG. 2) broken along the horizontal direction. And a second widening portion 84 integrally provided at the downstream end in the direction.
  • the second flat portion 83 has a constant width along the flow direction of the fuel gas 301.
  • the second widening portion 84 increases in width in the flow direction of the fuel gas 301.
  • the second widening portion 84 has a horizontal cross section in a substantially isosceles triangle shape, the base end portion is connected to the second flat portion 83, and the tip end portion is wide toward the downstream side in the flow direction of the fuel gas 301
  • the front end is a plane perpendicular to the flow direction of the fuel gas 301. That is, the second widening portion 84 has a first guide surface 84a inclined to the inside in the width direction (the center line O side of the fuel nozzle 61) and an end surface 84c on the front end side. There is no guide surface on the inner wall surface 61a side of the fuel nozzle 61, and the end surface of the second flat portion 83 is a flat surface.
  • the flow of the fuel gas 301 is separated at the corner formed by the guide surface 84 a and the end surface 84 c.
  • the width of the second widening portion 84 is constant along its longitudinal direction (vertical direction), but may be different. By making the second widening portion 84 smaller, the internal ignition can be relatively strengthened.
  • the first guide surface 84 a and the end surface 84 c are preferably flat surfaces, but may be surfaces bent or curved in a concave or convex shape.
  • the third flat holding member 73 has a third flat portion 85 having a constant width and a front end portion of the third flat portion 85 (a flow of the fuel gas 301) in a sectional shape (FIG. 2) broken along the horizontal direction. And a third widening portion 86 integrally provided at the downstream end in the direction.
  • the third flat portion 85 has a constant width along the flow direction of the fuel gas 301.
  • the third widening portion 86 increases in width in the flow direction of the fuel gas 301.
  • the third widening portion 86 has a substantially isosceles triangular horizontal cross section, the base end portion is connected to the third flat portion 85, and the tip end portion is wide toward the downstream side in the flow direction of the fuel gas 301
  • the front end is a plane perpendicular to the flow direction of the fuel gas 301. That is, the third widening portion 86 includes a first guide surface 86a inclined to the one first flame stabilizing member 71 side, a second guide surface 86b inclined to the other first flame stabilizing member 71 side, and a front end side. And an end face 86c.
  • the flow of the fuel gas 301 is separated at the corner formed by the guide surfaces 86a and 86b and the end surface 86c.
  • the width of the third widening portion 86 is constant along the longitudinal direction (vertical direction), but the width may be different.
  • the first guide surface 86a, the second guide surface 86b, and the end surface 86c are preferably flat surfaces, but may be surfaces bent or curved in a concave or convex shape.
  • the first flame stabilizing member 71, the second flame stabilizing member 72, the third flame stabilizing member 73, and the inner wall surface 61a of the fuel nozzle 61 are arranged with a predetermined gap therebetween.
  • this predetermined interval means a gap equal to or greater than the width of the widened portions 82, 84, 86 of the flame stabilizing members 71, 72, 73, or at least the widened portions 82, 84, 86 of the flame stabilizing members 71, 72, 73.
  • first, second and third flame stabilizing members 71, 72 and 73 as the flame stabilizer 64 are disposed at predetermined intervals in the width direction (horizontal direction).
  • the second and third flame stabilizing members 72 and 73 are provided with widening portions 84 and 86 at their tip portions, respectively, and in the widening portions 84 and 86, the end faces 84c and 86c correspond to the opening of the fuel nozzle 61.
  • 61 b and the same position in the flow direction of the fuel gas 301 are arranged on the same plane.
  • the first flame stabilizing member 71 is provided with a first widening portion 82 at its front end portion, and the first widening portion 82 has an end face 82c in the ejection direction of the fuel gas 301 from the opening 61b of the fuel nozzle 61. It is located upstream. That is, in the second and third flame stabilizing members 72 and 73, the end faces 84c and 86c of the widened portions 84 and 86 and the opening 61b of the fuel nozzle 61 are at the same position in the ejection direction of the fuel gas 301.
  • the end face 82c of the first widening part 82 is predetermined on the upstream side of the fuel gas 301 in the ejection direction with respect to the opening 61b of the fuel nozzle 61 (the end faces 84c and 86c of the widening parts 84 and 86). It is disposed at a position separated by a distance L.
  • the first, second, and third flame stabilizing members 71, 72, 73 are supported by welding or the like on the inner wall surface 61a of the fuel nozzle 61 via the supporting members 87, 88 at the upper end and lower end of the rear portion There is.
  • the support members 87 and 88 are fixed to the upper and lower portions of the inner wall surface 61a of the fuel nozzle 61, and the upper and lower end portions of the first, second and third flame stabilizing members 71, 72 and 73 support this support. It is supported by members 87 and 88.
  • the first, second, and third flame stabilizing members 71, 72, 73 are fixed to the support members 87, 88 fixed to the inner wall surface 61 a of the fuel nozzle 61.
  • the present invention is not limited to this configuration.
  • the first flame stabilizing member 71 is disposed at a position where the end surface 82 c of the first wide portion 82 is retracted by a predetermined distance L from the opening 61 b of the fuel nozzle 61. It is conceivable to change the predetermined distance L of the position of the first widening portion 82 in accordance with the type of fuel, the amount of ejection, and the like. Therefore, it is desirable to provide the first flame stabilizing member 71 so as to be adjustable in position along the ejection direction of the fuel gas 301.
  • the first, second, and third flame stabilizing members 71, 72, 73 are supported by the supporting members 87, 88 as the flame holder 64, so that the area where the fuel gas flow path P1 has six is provided. It will be divided into That is, the fuel gas flow path P 1 includes the first fuel gas flow path P 11 between the third flame holding member 73 and each of the first flame holding members 71, the first flame holding member 71 and the second flame holding member 72. And the third fuel gas flow path P13 between the second flame holding member 72 and the inner wall surface 61a of the fuel nozzle 61.
  • the support members 87 and 88 support the flame stabilizing members 71, 72, 73, they do not affect the flow of the fuel gas 301, and the flame retaining members 71, 72, 73
  • the width (thickness) is set to be as small as possible (thin thickness).
  • the circumferential support position where the flame stabilizing members 71, 72, 73 are supported by the supporting members 87, 88 is not limited to the embodiment.
  • the second flame stabilizing member 72 and the third flame stabilizing member 73 are disposed between the second flame stabilizing member 72 and the third flame stabilizing member 73 although the flat portions 83 and 85 are present.
  • the first flame stabilizing member 71 does not have a flat portion and is constituted only by the first widening portion 82. Therefore, the first flame stabilizing member 71 is miniaturized, and a working space is secured behind each of the flame stabilizing members 71, 72, 73. The operator can access the flame stabilizing members 71, 72, 73 from the base end side of the fuel nozzle 61, and can easily carry out maintenance work such as cleaning, repair, and replacement of the flame holder 64. it can.
  • FIG. 3 is a horizontal sectional view showing the configuration of a combustion burner according to another embodiment.
  • the members having the same functions as those in the above-described embodiment are denoted by the same reference numerals, and detailed descriptions thereof will be omitted.
  • the combustion burner 21A according to the embodiment shown in FIG. 3 is provided with a fuel nozzle 61, a combustion air nozzle 62, and a secondary air nozzle 63 from the center side, and a flame holder 64A is provided in the fuel nozzle 61. It is done.
  • the flame holder 64A is configured of two first flame holding members 71, two second flame holding members 72, and one third flame holding member 73.
  • the first flame stabilizing member 71, the second flame stabilizing member 72, and the third flame stabilizing member 73 are disposed along the flow direction of the fuel gas 301 and along the vertical direction, and at predetermined intervals in the horizontal direction. It is arranged.
  • the first flame stabilizing member 71 has a first widening portion 82 whose width is expanded toward the downstream side in the flow direction of the fuel gas 301 in a cross-sectional shape broken along the horizontal direction, and the first widening portion 82 Is in the shape of a triangular prism. That is, the first wide portion 82 includes the first guide surface 82a, the second guide surface 82b, and the end surface 82c.
  • the second flame stabilizing member 72 is integrally provided at the front end portion of the second flat portion 83 having a constant width and a front end portion of the second flat portion 83 in a sectional shape broken along the horizontal direction, and the width is a fuel gas
  • a second widening portion 84 is formed to expand toward the downstream side in the flow direction of the line 301.
  • the second flat portion 83 has a constant width along the flow direction of the fuel gas 301.
  • the second widening portion 84 has a first guide surface 84 a and an end surface 84 c.
  • the third flame stabilizing member 73 has a third widening portion 86 whose width extends toward the downstream side of the flow direction of the fuel gas 301 along the horizontal direction, and the third widening portion 86 has a triangular prism shape.
  • the third widening portion 86 has a horizontal cross section in the form of a substantially isosceles triangle, and is inclined to the first guide surface 86 a that is inclined toward the one first flame stabilizing member 71 and to the other first flame stabilizing member 71. And an end surface 86c on the front end side.
  • a plurality of first flame stabilizing members 71 are provided at predetermined intervals in the horizontal direction, and the second flame stabilizing members 72 are provided with fuel from the first flame stabilizing members 71.
  • the third flame stabilizing member 73 is disposed between the plurality of first flame stabilizing members 71 and provided at predetermined intervals on both sides of the inner wall surface 61 a of the nozzle 61, and the third flame stabilizing member 73 includes fuel gas 301. Only the third widening portion 86 which widens toward the downstream side in the flow direction.
  • first flame stabilizing members 71, second flame stabilizing members 72 and third flame stabilizing members 73 are alternately provided at predetermined intervals, and flat portions of the third flame stabilizing members 73 disposed at the center are eliminated.
  • FIG. 4 is a horizontal sectional view showing a combustion burner according to another embodiment.
  • the members having the same functions as those in the above-described embodiment are denoted by the same reference numerals, and detailed descriptions thereof will be omitted.
  • the combustion burner 21B is provided with a fuel nozzle 61, a combustion air nozzle 62, and a secondary air nozzle 63 from the center side, and a flame holder 64B is provided in the fuel nozzle 61. There is.
  • the flame holder 64B is configured of two first flame holding members 71, two second flame holding members 72, and one third flame holding member 73.
  • the first flame stabilizing member 71, the second flame stabilizing member 72, and the third flame stabilizing member 73 are disposed along the flow direction of the fuel gas 301 and along the vertical direction, and at predetermined intervals in the horizontal direction. It is arranged.
  • the first flame stabilizing member 71 is a tip end portion of the fuel nozzle 61, and has a predetermined distance from the inner wall surface 61a of the fuel nozzle 61 on both sides in the radial direction with respect to the center line O along the ejection direction of the fuel gas 301. It is arranged with an empty space.
  • the second flame stabilizing member 72 is a tip end portion of the fuel nozzle 61 and is disposed at a predetermined interval on both sides of each first flame stabilizing member 71 in the horizontal direction. It is arrange
  • the third flame stabilizing member 73 is a tip end portion of the fuel nozzle 61, and is disposed on the center line O along the ejection direction of the fuel gas 301 and at a predetermined interval from the respective first flame stabilizing members 71. There is.
  • the first flame stabilizing member 71 has a first flat portion 81 having a constant width and a first flat portion 81 integrally provided at a front end portion of the first flat portion 81 in a sectional shape broken along the horizontal direction.
  • a wide portion 82 is formed.
  • the first flat portion 81 has a constant width along the flow direction of the fuel gas 301.
  • the width of the first widening portion 82 increases in the flow direction of the fuel gas 301.
  • the first widening portion 82 has a horizontal cross section in a substantially isosceles triangle shape, the base end portion is connected to the first flat portion 81, and the tip end portion is wide toward the downstream side in the flow direction of the fuel gas 301
  • the front end is a plane perpendicular to the flow direction of the fuel gas 301. That is, the first wide portion 82 has a first guide surface 82a inclined inward in the width direction, a second guide surface 82b inclined outward in the width direction, and an end surface 82c on the front end side.
  • the second flame stabilizing member 72 has a second widening portion 84 whose width is expanded toward the downstream side in the flow direction of the fuel gas 301 in a cross-sectional shape broken along the horizontal direction, and the second widening portion 84 Is in the shape of a triangular prism. That is, the second widening portion 84 has a first guide surface 84a whose horizontal cross section has a substantially isosceles triangle shape and is inclined inward in the width direction, and an end surface 84c orthogonal to the flow direction of the fuel gas 301 on the front end side. There is no guide surface on the outer side in the width direction, and it is a plane along the flow direction of the fuel gas 301.
  • the third flame stabilizing member 73 has a third widening portion 86 whose width extends toward the downstream side of the flow direction of the fuel gas 301 in a cross-sectional shape broken along the horizontal direction, and the third widening portion 86 Is in the shape of a triangular prism. That is, the third widening portion 86 has a horizontal cross section in the form of a substantially isosceles triangle, and is inclined to the first guide surface 86 a that is inclined toward the one first flame stabilizing member 71 and to the other first flame stabilizing member 71. And an end surface 86c on the front end side.
  • the first flame stabilizing member 71 has the first flat portion 81 and the first widening portion 82, and the second flame stabilizing member 72 is the second widening portion. It has only 84.
  • the working space can be secured in the fuel nozzle. . Therefore, the maintenance worker can access the flame holder 64B from the base end side of the fuel nozzle 61 through the working space, facilitating maintenance work such as cleaning, repair and replacement of the flame holder 64B. It can be implemented.
  • the flat portion of the first flame stabilizing member 71 is eliminated and only the first widening portion 82 is used.
  • the first flame stabilizing member 71 and the third flame stabilizing member are used.
  • the flat portion of 73 is eliminated and only the second and third widening portions 84 and 86 are provided
  • the flat portions of the second flame stabilizing member 72 and the third flame stabilizing member 73 are eliminated and the widening portion
  • the present invention is not limited to these configurations.
  • the first flame stabilizing member 71 and the second flame stabilizing member 72 may be formed of a flat portion and a widening portion
  • the flat portion of the third flame stabilizing member 73 may be eliminated to form only the widening portion.
  • the flat portion of any of the first flame stabilizing member 71, the second flame stabilizing member 72, and the third flame stabilizing member 73 is eliminated and only the widening portion is provided.
  • all flat portions of the second flame stabilizing member 72 and the third flame stabilizing member 73 may be eliminated and only the widening portion may be provided. That is, the first flame stabilizing member 71 has only the first widening portion 82 which widens toward the downstream side of the flow direction of the fuel gas 301, and the second flame stabilizing member 72 is downstream of the flow direction of the fuel gas 301
  • the third flame stabilizing member 73 has only the third widening portion 86 widening toward the downstream side in the flow direction of the fuel gas 301. Therefore, the worker can access the flame holder 64 from the base end side of the fuel nozzle 61 through the large working space, and facilitates maintenance work such as cleaning, repair, and replacement of the flame holder 64. It can be implemented.
  • first flame holding members 71, two second flame holding members 72, and one third flame holding member 73 are provided as the flame holder 64, 64A, 64B.
  • the flame holder may be composed of two first flame holding members and two second flame holding members, or the flame holder may be composed of two first flame holding members and one third flame holding member. It may be configured.
  • the number of first flame stabilizing members is not limited to one or two, and three or more may be provided.
  • the fuel nozzle 61, the combustion air nozzle 62, and the secondary air nozzle 63 are rectangular, but the present invention is not limited to this shape, and may be circular.
  • the first flame stabilizing member 71, the second flame stabilizing member 72, and the third flame stabilizing member 73 are disposed along the flow direction of the fuel gas 301 and along the vertical direction.
  • the flame stabilizing member 71, the second flame stabilizing member 72, and the third flame stabilizing member 73 may be disposed along the flow direction of the fuel gas 301 and along the horizontal direction.
  • the boiler of the present invention is a coal-fired boiler, but as the solid fuel, a boiler using biomass, petroleum coke, petroleum residue or the like may be used. Moreover, it can be used not only for solid fuel as fuel but for oil-fired boilers, such as heavy oil. Furthermore, it can be applied to mixed burning of these fuels.

Landscapes

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

Abstract

L'invention concerne un brûleur à combustion, un dispositif de combustion et une chaudière, comportant : une buse de ravitaillement en combustible (61) pour éjecter un gaz combustible (301) ; une buse de ravitaillement en air de combustion (62) pour éjecter un gaz de combustion de gaz combustible (302) depuis l'extérieur de la buse de ravitaillement en combustible (61) ; et un stabilisateur de flamme (64) pour élargir la direction d'éjection du gaz combustible (301). Le stabilisateur de flamme (64) comporte des premiers éléments de stabilisation de flamme (71) agencés sur le côté amont d'une partie d'ouverture (61b) de la buse de ravitaillement en combustible (61) dans la direction d'éjection de gaz combustible (301), et des seconds éléments de stabilisation de flamme (72) agencés sur le côté aval des premiers éléments de stabilisation de flamme (71) dans la direction d'éjection de gaz combustible (301), et adjacents aux premiers éléments de stabilisation de flamme (71). Les premiers éléments de stabilisation de flamme (71) ne comportent qu'une première section élargie (82) dont la largeur augmente vers le côté aval dans la direction d'écoulement du gaz combustible (301).
PCT/JP2018/033436 2018-01-23 2018-09-10 Brûleur à combustion, dispositif de combustion et chaudière WO2019146154A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201880086613.8A CN111602005B (zh) 2018-01-23 2018-09-10 燃烧炉及燃烧装置以及锅炉

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-008995 2018-01-23
JP2018008995A JP2019128080A (ja) 2018-01-23 2018-01-23 燃焼バーナ及び燃焼装置並びにボイラ

Publications (1)

Publication Number Publication Date
WO2019146154A1 true WO2019146154A1 (fr) 2019-08-01

Family

ID=67394537

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2018/033436 WO2019146154A1 (fr) 2018-01-23 2018-09-10 Brûleur à combustion, dispositif de combustion et chaudière

Country Status (3)

Country Link
JP (1) JP2019128080A (fr)
CN (1) CN111602005B (fr)
WO (1) WO2019146154A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011127836A (ja) * 2009-12-17 2011-06-30 Mitsubishi Heavy Ind Ltd 固体燃料焚きバーナ及び固体燃料焚きボイラ
JP2012215362A (ja) * 2011-04-01 2012-11-08 Mitsubishi Heavy Ind Ltd 燃焼バーナ
JP2016156529A (ja) * 2015-02-23 2016-09-01 三菱日立パワーシステムズ株式会社 燃焼バーナ、ボイラ、及び燃料ガスの燃焼方法
WO2016158079A1 (fr) * 2015-03-31 2016-10-06 三菱日立パワーシステムズ株式会社 Brûleur à combustion et chaudière
JP2017053602A (ja) * 2015-09-11 2017-03-16 三菱日立パワーシステムズ株式会社 燃焼バーナ及びこれを備えたボイラ

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011127836A (ja) * 2009-12-17 2011-06-30 Mitsubishi Heavy Ind Ltd 固体燃料焚きバーナ及び固体燃料焚きボイラ
JP2012215362A (ja) * 2011-04-01 2012-11-08 Mitsubishi Heavy Ind Ltd 燃焼バーナ
JP2016156529A (ja) * 2015-02-23 2016-09-01 三菱日立パワーシステムズ株式会社 燃焼バーナ、ボイラ、及び燃料ガスの燃焼方法
WO2016158079A1 (fr) * 2015-03-31 2016-10-06 三菱日立パワーシステムズ株式会社 Brûleur à combustion et chaudière
JP2017053602A (ja) * 2015-09-11 2017-03-16 三菱日立パワーシステムズ株式会社 燃焼バーナ及びこれを備えたボイラ

Also Published As

Publication number Publication date
JP2019128080A (ja) 2019-08-01
CN111602005B (zh) 2022-08-12
CN111602005A (zh) 2020-08-28

Similar Documents

Publication Publication Date Title
JP6408134B2 (ja) 燃焼バーナ及びボイラ
EP2998651B1 (fr) Chaudière et procédé pour la faire fonctionner
US10458645B2 (en) Combustion burner and boiler provided with same
US10605455B2 (en) Combustion burner and boiler
WO2019146154A1 (fr) Brûleur à combustion, dispositif de combustion et chaudière
JP6632841B2 (ja) 燃焼バーナ及びこれを備えたボイラ
JP6640592B2 (ja) 燃焼バーナ及び燃焼装置並びにボイラ
JP6640591B2 (ja) 燃焼バーナ及び燃焼装置並びにボイラ
WO2017043218A1 (fr) Brûleur de combustion et chaudière pourvue de celui-ci
CN111656096B (zh) 燃烧炉及锅炉
JP3202489U (ja) 燃焼バーナ及びボイラ
JP6797714B2 (ja) 燃焼装置
JP6737005B2 (ja) バーナ
JP6729045B2 (ja) 助燃用ガスバーナ及び副生ガスバーナ

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18902491

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18902491

Country of ref document: EP

Kind code of ref document: A1