JP3220385U - Combustion burner insertion jig - Google Patents

Abstract

A jig for inserting a combustion burner is provided which can easily attach the combustion burner to a wind box and can reduce a load on a bolt when the combustion burner is retracted.
A combustion burner insertion jig 100 is detachably attached to a front plate flange projecting from a plurality of bolts provided on the outside of a furnace wall of a wind chamber that is disposed on a furnace wall and can accommodate a combustion burner. A combustion burner insertion jig to be mounted, which is plate-shaped and includes a base 1 having a flat first surface 1m facing the front plate flange in the mounted state, and a bolt protruding from the front plate flange in the mounted state. A bolt insertion portion 2 that is inserted from the first surface 1m side of the base portion 1 to the second surface 1n side opposite to the first surface 1m, and is connected to the second surface 1n side of the base portion 1 and is provided with a combustion burner And a connecting portion 3 capable of connecting a linear member for drawing the air into the wind box.
[Selection] Figure 3

Description

  The present invention relates to a jig for inserting a combustion burner.

  A large boiler such as a coal-fired boiler has a furnace that has a hollow shape and is installed in a vertical direction, and a plurality of combustion burners are arranged along the circumferential direction on the furnace wall. The coal-fired boiler has a flue connected to the upper part of the furnace in the vertical direction, and a heat exchanger for generating steam and heating the flue is disposed in the flue. The combustion burner injects a mixture of fuel and air into the furnace to form a flame, and combustion gas is generated and flows into the flue. The combustion gas is heated by exchanging heat with water and steam flowing in the heat transfer tubes constituting the heat exchanger, thereby generating superheated steam.

  The combustion burner is accommodated in a wind box provided on the furnace wall. When performing maintenance of the combustion burner, the combustion burner is extracted from the wind box, and after necessary work is performed, the combustion burner is inserted into the wind box and reinstalled. Since the combustion burner is long and heavy, when inserting the combustion burner into the wind box, for example, an air cylinder mechanism is attached to the front of the wind box, and the combustion burner is made into the wind box by the contraction force of the air cylinder mechanism. There is known a method of moving the head (for example, see Patent Document 1).

Japanese Patent No. 3823353

  The combustion burner is long and heavy. For this reason, in maintenance of the combustion burner, for example, eye nuts are attached to the bolts provided on the front plate of the wind box at one location on each of the left and right sides of the front plate, and the other end of the wire connected to the combustion burner is used as the eye nut. A method of moving a combustion burner to a wind box by connecting and drawing a wire with a chain block or the like is performed. In this method, the other end of the wire may be connected to a protruding portion provided in the wind box.

  However, in the method of connecting and pulling the wire to the eye nut, the tension of the wire is concentrated on one bolt via the eye nut, so that the load on the bolt becomes large and the bolt may be damaged. Further, in the method of connecting the wire to the protruding portion inside the wind box, it may take time and labor to hang the wire. In addition, there is no projection for hooking the wire at a desired position, and it may be difficult to connect the wires.

  The present invention has been made in view of the above, and it is easy to attach to the wind box when pulling the combustion burner, and to the bolt provided on the front plate of the wind box when pulling the combustion burner. An object of the present invention is to provide a combustion burner insertion jig capable of reducing the load of the combustion burner.

  The combustion burner insertion jig according to the present invention is detachably attached to a front plate flange on which a plurality of bolts provided on the outside of the furnace wall of the wind box, which is disposed on the furnace wall and can accommodate the combustion burner, protrudes. A combustion burner insertion jig to be mounted, which is plate-shaped and has a flat first surface facing the front plate flange in the mounted state, and the bolt protruding from the front plate flange in the mounted state Is connected to the second surface side of the base portion, the bolt insertion portion for inserting the combustion burner from the first surface side of the base portion to the second surface side opposite to the first surface. And a connecting portion capable of connecting a linear member for drawing into the wind box.

  Accordingly, the first surface of the base portion is directed to the front plate, a plurality of bolts fixed to the front plate are inserted into the bolt insertion portion, the base portion is penetrated, and the bolt through which the base portion is inserted is fixed with a nut. By connecting the linear member to the connecting portion connected to the two surfaces, the combustion burner can be easily attached to the front plate. Further, when the combustion burner is inserted into the wind box, the load of the combustion burner is applied to the entire base via the connecting portion, so that the load of the combustion burner is distributed to a plurality of bolts, and the load per bolt is reduced. The As a result, it is easy to attach the wind box to the front plate flange, and it is possible to reduce the load on the bolt when the combustion burner is pulled into the furnace.

  Moreover, the said base part is a shape extended in the long side direction, and may have the reinforcement part formed in the said long side direction in the said 2nd surface.

  Therefore, by providing the reinforcing portion, it is possible to suppress the base portion from being deformed when the connecting portion is pulled. Thereby, the tension | tensile_strength of a linear member can be disperse | distributed uniformly with respect to a some volt | bolt.

  The base is a plate-shaped member or a plate-shaped portion formed in one of an L-shaped cross-section member or angle steel, and the reinforcing portion is the other of the L-shaped plate-shaped member or angle steel It may be a plate-like portion formed in the above.

  Therefore, it is possible to easily realize a configuration capable of suppressing the deformation of the base by forming the plate-shaped member having the L-shaped cross section or each plate-shaped portion of the angle steel as the base and the reinforcing portion. Angle-shaped steel may be used for the plate-like member having an L-shaped cross section.

  The bolt insertion part may have at least one of a circular hole part, an oval hole part, and a notch part in which a part of the base part is notched.

  Therefore, when the bolt insertion portion is a circular hole, the circular hole can be used as a reference for the base when the bolt is inserted. Further, when the bolt insertion portion is an oval hole, an error can be allowed for the interval between the plurality of bolts. In addition, when the bolt insertion part is a notch part, even after the nut is attached to the bolt, it is possible to easily attach and detach the base part by removing it from the side in the direction of the notch part.

  Moreover, the said bolt insertion part may have the said circular hole provided in one place, and the said oblong hole provided in the other location.

  Accordingly, it is possible to allow an error in the interval between a plurality of bolts by using an oval hole while using a circular hole as a reference for the base when inserting the bolt.

  Further, the bolt insertion portions may all be the elliptical holes.

  Therefore, it is possible to allow an error in the interval between the plurality of bolts by the oval hole.

  The bolt insertion part may be a notch part in which a part of the base part is notched.

  Therefore, even after the nut is attached to the bolt, the attachment / detachment handling for removing and attaching the base is facilitated by moving the nut from the side toward the notch.

  According to the present invention, when the combustion burner is retracted, it can be easily attached to the wind box, and when the combustion burner is retracted, the load on the bolts provided on the front plate of the wind box can be reduced. A combustion burner insertion jig can be provided.

FIG. 1 is a schematic configuration diagram illustrating a coal fired boiler according to the present embodiment. FIG. 2 is a diagram illustrating a configuration example when the wind box is viewed from the outside of the furnace. FIG. 3 is a view showing an example of a combustion burner insertion jig according to the present embodiment. FIG. 4 is a view showing an example of a combustion burner insertion jig according to the present embodiment. FIG. 5 is a view showing an example of a combustion burner insertion jig according to the present embodiment. FIG. 6 is a view showing an example of a usage pattern of the combustion burner insertion jig. FIG. 7 is a view showing an example of a usage pattern of the combustion burner insertion jig. FIG. 8 is a view showing another example of a combustion burner insertion jig. FIG. 9 is a view showing another example of a combustion burner insertion jig. FIG. 10 is a view showing another example of a combustion burner insertion jig.

  Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings. In addition, this invention is not limited by this embodiment, Moreover, when there exist multiple embodiment, what comprises combining each embodiment is also included.

  FIG. 1 is a schematic configuration diagram illustrating a coal fired boiler according to the present embodiment.

  The boiler of the present embodiment uses pulverized coal obtained by pulverizing coal as pulverized fuel (carbon-containing solid fuel), combusts the pulverized coal with a combustion burner, recovers heat generated by the combustion, and supplies water, steam, and heat. It is a coal fired (pulverized coal fired) boiler that can be replaced to produce superheated steam. In the following description, “upper” and “upper” indicate the upper side in the vertical direction, and “lower” and “lower” indicate the lower side in the vertical direction.

  In this embodiment, as shown in FIG. 1, the coal fired boiler 10 has a furnace 11, a combustion device 12, and a flue 13. The furnace 11 has a hollow shape of a square tube and is installed along the vertical direction. A furnace wall (heat transfer tube) that constitutes the furnace 11 includes a plurality of evaporation tubes and fins that connect them, and suppresses a temperature rise of the furnace wall by exchanging heat with water or steam.

  The combustion device 12 is provided on the lower side of the furnace wall constituting the furnace 11. In the present embodiment, the combustion device 12 has a plurality of combustion burners (for example, 21, 22, 23, 24, 25) mounted on the furnace wall. For example, the combustion burners 21, 22, 23, 24, and 25 are arranged in a plurality of stages along the vertical direction as one set arranged at equal intervals along the circumferential direction. However, the shape of the furnace, the number of combustion burners in one stage, and the number of stages are not limited to this embodiment.

  Each combustion burner 21, 22, 23, 24, 25 is connected to pulverizers (mills) 31, 32, 33, 34, 35 via pulverized coal supply pipes 26, 27, 28, 29, 30. Although not shown, the crushers 31, 32, 33, 34, and 35 are supported, for example, in a housing so that the rotary table can be driven to rotate, and a plurality of rollers are linked to the rotation of the rotary table above the rotary table. It is configured to be rotatably supported. When the coal is introduced between the plurality of rollers and the rotary table, the pulverized coal is pulverized into a predetermined size of pulverized coal and classified by the carrier gas (primary air). 27, 28, 29, 30 can be supplied to the combustion burners 21, 22, 23, 24, 25.

  Further, the furnace 11 is provided with a wind box 36 at the mounting position of each combustion burner 21, 22, 23, 24, 25, and one end of an air duct 37 is connected to the wind box 36. The air duct 37 is provided with a blower 38 at the other end.

  The flue 13 is connected to the upper part of the furnace 11 in the vertical direction. The flue 13 is provided with superheaters 41, 42, 43, reheaters 44, 45, and economizers 46, 47 as heat exchangers for recovering the heat of the combustion gas. Heat exchange is performed between the combustion gas generated by the combustion and the feed water or steam flowing through each heat exchanger.

  The flue 13 is connected to a gas duct 48 through which the combustion gas that has exchanged heat is discharged downstream. The gas duct 48 is provided with an air heater (air preheater) 49 between the air duct 37 and heat exchange between the air flowing through the air duct 37 and the combustion gas flowing through the gas duct 48, and the combustion burners 21 and 22. , 23, 24, 25 can raise the temperature of combustion air.

  The flue 13 is provided with a denitration catalyst 50 at a position upstream of the air heater 49. The denitration catalyst 50 supplies a reducing agent having an action of reducing nitrogen oxides such as ammonia and urea water into the flue 13, and reacts the combustion gas supplied with the reducing agent with the nitrogen oxides and the reducing agent. By promoting, nitrogen oxides in the combustion gas are removed and reduced. The gas duct 48 connected to the flue 13 is provided with a dust treatment device (electric dust collector, desulfurization device) 51, an induction blower 52, etc. at a position downstream of the air heater 49, and a chimney 53 is provided at the downstream end. ing.

  On the other hand, when the pulverizers 31, 32, 33, 34, and 35 are driven, the pulverized coal fuel is generated through the pulverized coal supply pipes 26, 27, 28, 29, 30 and the combustion burners 21, 22, 23, 24, 25. Also, heated combustion air is supplied from the air duct 37 to the combustion burners 21, 22, 23, 24, 25 via the wind box 36. Then, the combustion burners 21, 22, 23, 24, and 25 blow the pulverized fuel mixture mixed with the pulverized coal and the carrier gas (primary air) into the furnace 11 and the combustion air into the furnace 11. By igniting, a flame can be formed. A flame is generated in the lower part of the furnace 11, and the combustion gas rises in the furnace 11 and is discharged to the flue 13.

  Thereafter, the combustion gas is subjected to heat exchange in the superheaters 41, 42, 43, the reheaters 44, 45, and the economizers 46, 47 disposed in the flue 13, and then the nitrogen oxides are reduced and removed by the denitration catalyst 50. After the particulate matter is removed and the sulfur content is removed by the dust treatment device 51, the dust is discharged from the chimney 53 to the atmosphere.

FIG. 2 is a diagram illustrating a configuration example when the wind box 36 is viewed from the outside of the furnace 11. Hereinafter, in describing the configuration of the wind box 36, the direction from the furnace inner side to the furnace outer side is the front with respect to the wind box 36, and the direction from the furnace outer side to the furnace inner side is the rear with respect to the wind box 36. To do. In the following description, the combustion burners 21, 22, 23, 24, and 25 will be described as the combustion burner 20 when not described.
As shown in FIG. 2, the wind box 36 is provided on the furnace wall 11a, and the wind box 36 includes a wall portion 36w and a front plate flange 36f. The wall portion 36w has a ceiling portion and a bottom portion that are arranged above and below the paper surface in FIG. 2 in parallel to the horizontal direction, and left and right side portions in FIG. 2 that are disposed in parallel to the vertical direction. The wall part 36w forms a rectangular parallelepiped space inside. In the air box 36, the combustion burner 20 is inserted into the space formed by the wall portion 36w.

  The front plate flange 36 f has a rectangular frame shape, and is provided at the furnace outer end of the wind box 36. The front plate flange 36f is provided in a state of projecting outward from the furnace outer end of the wall 36w. An end surface (front surface) outside the furnace of the front plate flange 36f has a planar shape extending in the vertical direction and the horizontal direction. A plurality of bolts 36b are provided on the front surface of the front plate flange 36f in a state of protruding forward. The plurality of bolts 36b are fixed to the front plate flange 36f by welding or the like, for example. The plurality of bolts 36b are arranged in a straight line at predetermined intervals along each side of the front plate flange 36f. Each bolt 36b has a screw part arranged in a state of protruding toward the front of the front plate flange 36f. A nut (not shown) can be screwed to the screw portion of the bolt 36b. A front plate is disposed on the front surface on the front side of the front plate flange 36f. An insertion hole for inserting a plurality of bolts 36b is formed in the front plate. The front plate is disposed in front of the front plate flange 36f with the bolt 36b inserted through the insertion hole, and a nut (not shown) is screwed to the screw portion of the bolt 36b, thereby sealing the space inside the wind box 36. It has come to be stopped.

  The combustion burner insertion jig 100 according to the present embodiment can be attached to the front plate flange 36f. The combustion burner insertion jig 100 is used, for example, when the combustion burner 20 taken out from the inside of the wind box 36 during maintenance or the like is inserted into the wind box 36 again.

  3 to 5 are views showing an example of the combustion burner insertion jig 100 according to the present embodiment. 3 is a view when viewed from the direction shown in FIG. 2, FIG. 4 is a view when viewed from the A direction in FIG. 3, and FIG. 5 is a view when viewed from the B direction in FIG. FIG. As shown in FIGS. 3 to 5, the combustion burner insertion jig 100 is a plate-like member having an L-shaped cross section, and may be, for example, angle steel, and includes a base portion 1, a bolt insertion portion 2, and the like. The connecting portion 3 and the reinforcing portion 4 are provided.

  The base 1 is plate-shaped and has a shape extending in the long side direction. The base 1 is provided on one plate-shaped portion of a plate-shaped member or angle steel having an L-shaped cross section. The base portion 1 has a first surface 1m facing the front plate flange 36f in a mounted state attached to the front plate flange 36f, and a second surface 1n opposite to the first surface 1m. Each of the first surface 1m and the second surface 1n is planar. The base 1 is formed with a substantially uniform thickness throughout.

  The bolt insertion part 2 inserts the bolt 36b from the first surface 1m side of the base 1 to the second surface 1n side in the mounted state. The bolt insertion part 2 has, for example, a circular hole 2P through which the first surface 1m and the second surface 1n of the base 1 are inserted. The hole 2P can be inserted through the bolt 36b and is formed to have a diameter smaller than the outer shape of a nut (not shown) that is screwed to the bolt 36b. A plurality of bolt insertion portions 2 are arranged side by side in a direction in which the base portion 1 extends in the long side direction. The plurality of holes 2P are provided at a predetermined pitch equal to the plurality of bolts 36b in the front plate flange 36f. Therefore, it can be easily attached at a position suitable for the operation of inserting the combustion burner 20.

  The connecting portion 3 is provided on the second surface 1n side of the base portion 1 and can connect a drawing wire (linear member) W1 for drawing the combustion burner 20. The connection part 3 is plate shape, for example, and has the hook part 3a for hooking the wire W1 for drawing. For example, an attachment / fixing bracket such as an eye plate may be used as the connecting portion 3. The connecting portion 3 is joined to the second surface 1n side of the base portion 1 by a technique such as welding. The hanging portion 3 a is a through hole that penetrates the connecting portion 3. In addition, the hook part 3a may be a ring shape protruding from the connecting part 3, for example. The pulling wire W1 is connected to the connecting portion 3 by hooking the pulling wire W1 on the hanging portion 3a.

  The reinforcing portion 4 suppresses deformation of the base portion 1. The reinforcing portion 4 is provided along the long side direction in which the base portion 1 extends. The reinforcing part 4 is provided in a plate-like member (another plate-like part) different from the base 1 in a plate-like member or angle steel having an L-shaped cross section. Thus, the base 1 is provided in one plate-like portion of the plate-shaped member or the angle steel having the L-shaped cross section, and the reinforcing portion 4 is provided in the other plate-like portion, so that the cross-section with respect to the base 1 is provided. It arrange | positions in the state which the reinforcement part 4 stood in the direction which performance improves. Therefore, the deformation of the base 1 can be reliably suppressed.

  6 and 7 are views showing an example of how the combustion burner insertion jig 100 is used. As shown in FIGS. 6 and 7, when the combustion burner 20 is inserted into the wind box 36 using the combustion burner insertion jig 100, the combustion burner 20 is suspended from the rail R by a suspension wire W2, for example. And The suspension wire W2 has one end connected to the burner body 20b of the combustion burner 20 and the other end connected to the slider S vertically above. The slider S is movable in the horizontal direction along a rail R that is installed in the vertical upper direction of the wind box 36 in advance. The rail R is arranged and fixedly supported on a structural beam member or the like in a state of extending in parallel with the insertion direction in which the combustion burner 20 is inserted into the wind box 36. For example, instead of the rail R, a ceiling beam portion or the like may be used.

  In this state, the combustion burner insertion jig 100 is mounted on the front plate flange 36 f of the wind box 36. In this case, the positions of the plurality of bolts 36b provided on the front plate flange 36f and the plurality of bolt insertion portions 2 are aligned, the plurality of bolts 36b are inserted into the plurality of bolt insertion portions 2, and the front surface of the front plate flange 36f The 1st surface 1m of the base 1 is made to contact. Thereby, the plurality of bolts 36b are inserted through the base portion 1 and protrude forward.

  Next, nuts (not shown) are screwed to the threaded portions of the plurality of bolts 36 b that protrude through the base 1. Thereby, the combustion burner insertion jig 100 is fastened to the front plate flange 36f. Thereafter, one end of the drawing wire W1 is connected to the hook portion 3a of the connecting portion 3, and the other end of the drawing wire W1 is connected to the burner support 20s of the combustion burner 20, for example. The connection destination of the other end of the lead-in wire W1 is not limited to the burner support 20s. Any suitable seat of the combustion burner 20 may be utilized. Then, a wire pulling device CB such as a chain block is connected to an intermediate portion of the drawing wire W1. In this state, the wire pulling device CB winds the pull-in wire W1, whereby the combustion burner 20 is pulled into the wind box 36 side. The combustion burner 20 moves in the insertion direction while being suspended by the suspension wire W2, and is inserted into the wind box 36 from the nozzle 20n side.

  At this time, the tension of the pull-in wire W <b> 1 acts over the entire base portion 1 via the connecting portion 3. In the base 1, a plurality of bolts 36b are fastened to the base 1 via nuts. For this reason, the tension | tensile_strength of the drawing wire W1 acts in the state disperse | distributed by the base 1 to the some volt | bolt 36b. Therefore, since the tension acting on each bolt 36b is reduced, the stress generated in the bolt 36b is reduced.

  Note that the number of bolts 36 b inserted into the bolt insertion portion 2 may be changed according to the weight of the combustion burner 20. For example, as the weight of the combustion burner 20 decreases, the number of bolts 36b inserted into the bolt insertion portion 2 can be reduced, and as the weight of the combustion burner 20 increases, the bolt 36b inserted into the bolt insertion portion 2 is reduced. You can increase the number.

  The combustion burner 20 inserted into the air box 36 is accommodated with the burner support 20s supported at the bottom. When the burner flange 20f of the combustion burner 20 reaches the front plate flange 36f, the pulling of the combustion burner 20 by the wire pulling device CB is finished, and the combustion burner insertion jig 100 is removed. Thereafter, the burner flange 20f is fixed with the bolts 36b provided on the front plate flange 36f by the front plate.

  As described above, the combustion burner insertion jig 100 according to the present embodiment is mounted on the front plate flange 36f in which the plurality of bolts 36b protrude from the wind box 36 that is disposed on the furnace wall 11a and can accommodate the combustion burner 20. A combustion burner insertion jig 100 having a base 1 having a planar first surface 1m facing the front plate flange 36f in the mounted state, and a bolt projecting forward from the front plate flange 36f in the mounted state 36b is provided on the second surface 1n side of the base portion 1, and is provided on the second surface 1n side of the base portion 1 through the first surface 1m side of the base portion 1 and the second surface 1n side opposite to the first surface 1m. The connection part 3 which can connect the wire W1 for drawing in for drawing in in the wind box 36 is provided.

  Accordingly, the first surface 1m of the base portion 1 is directed to the front plate flange 36f, and a plurality of bolts 36b fixed to the front plate flange 36f are inserted into the bolt insertion portion 2 so that the base portion 1 is inserted, and the base portion 1 is inserted. By fixing the bolt 36b with a nut and connecting the lead-in wire W1 to the connecting portion 3, the combustion burner 20 can be easily inserted into the wind box 36. Further, when the combustion burner 20 is inserted into the wind box 36, the load of the combustion burner 20 is applied to the entire base 1 through the connecting portion 3, so that the load of the combustion burner 20 is distributed to the plurality of bolts 36b, The load per bolt 36b is reduced. Thereby, it is easy to attach the combustion burner insertion jig 100 to the front plate flange 36f of the wind box 36, and it is possible to reduce the load on the bolt 36b when the combustion burner 20 is pulled.

  In the combustion burner insertion jig 100 according to the present embodiment, the base 1 has a shape extending in the long side direction, and has a reinforcing portion 4 formed in the long side direction on the second surface 1n. In this case, by providing the reinforcing portion 4, it is possible to suppress the base portion 1 from being deformed when the connecting portion 3 is pulled. Thereby, the tension | tensile_strength of the drawing wire W1 can be disperse | distributed uniformly with respect to the some volt | bolt 36b.

  In the combustion burner insertion jig 100 according to the present embodiment, the base portion 1 is formed by a plate-shaped member having an L-shaped cross section or one plate-shaped portion of angle steel, and the reinforcing portion 4 has an L-shaped cross section. It is formed by the other plate-shaped part of the plate-shaped member or angle steel formed. Therefore, the structure which can suppress a deformation | transformation of the base 1 is easily realizable by using each plate-shaped part of the plate-shaped member or angle steel formed in the L-shaped cross section as the base 1 and the reinforcement part 4. FIG.

  In the combustion burner insertion jig 100 according to this embodiment, one of the bolt insertion portions 2 may have a circular hole 2P having a diameter slightly larger than the outer diameter of the bolt 36b. The other diameter of the bolt insertion portion 2 is formed so that the bolt 36b can be sufficiently inserted and has a diameter smaller than the outer shape of a nut (not shown) screwed to the bolt 36b. An error in the installation position may be allowed. Therefore, when the bolt 36 b is inserted into the bolt insertion portion 2, the circular hole 2 </ b> P can be used as a reference for the position of the base 1.

  The technical scope of the present invention is not limited to the above-described embodiment, and appropriate modifications can be made without departing from the spirit of the present invention. For example, in the said embodiment, although the case where the volt | bolt insertion part 2 was a circular hole was mentioned as an example and demonstrated, it is not limited to this.

  FIG. 8 is a view showing another example of a combustion burner insertion jig. Like the combustion burner insertion jig 100A shown in FIG. 8, the base 1A may have a configuration in which an oval hole 2Q is formed as a bolt insertion portion 2A in the long side direction. In this case, the position of the combustion burner insertion jig 100A can be adjusted with respect to the interval between the plurality of bolts 36b, and an error can be allowed.

  FIG. 9 is a view showing another example of a combustion burner insertion jig. Like the combustion burner insertion jig 100B shown in FIG. 9, the base 1B may have a notch 2R in which a part of the base 1 is notched as the bolt insertion part 2B. In this case, even after the nut 36 is tightened and attached to the bolt 36b, the base 1B can be easily removed by simply loosening the nut.

  FIG. 10 is a view showing another example of a combustion burner insertion jig. Like the combustion burner insertion jig 100C shown in FIG. 10, the base 1C may have a circular hole 2P and an oval hole 2Q as the bolt insertion part 2C. In this case, the position of the combustion burner insertion jig 100A can be adjusted with respect to the interval between the plurality of bolts 36b by the oval hole 2Q while using the circular hole 2P as a reference for the position of the base 1C. Can be tolerated.

  In the above-described embodiment, the boiler of the present invention is a coal-fired boiler. However, the solid fuel may be a boiler using biomass, petroleum coke, petroleum residue, or the like. Further, the fuel can be used not only for solid fuel but also for oil-fired boilers such as heavy oil, and further, gas (by-product gas) can also be used as fuel. And it can apply also to the mixed combustion sowing of these fuels.

1, 1A, 1B, 1C Base portion 1m First surface 1n Second surface 2, 2A, 2B, 2C Bolt insertion portion 2P, 2Q Hole portion 2R Notch portion 3 Connection portion 3a Hanging portion 4 Reinforcement portion 10 Coal-fired boiler (boiler) )
11 furnace 11a furnace wall 12 combustion device 13 flue 20, 21, 22, 23, 24, 25 combustion burner 20b burner body 20f burner flange 20n nozzle 20s burner support 26, 27, 28, 29, 30 pulverized coal supply pipe 31, 32, 33, 34, 35 Crusher 36 Wind box 36b Bolt 36f Front plate flange 36w Wall 37 Air duct 38 Blower 41, 42, 43 Superheater (heat exchanger)
44 Second reheater (heat exchanger)
45 1st reheater (heat exchanger)
46 Second economizer (heat exchanger)
47 First economizer (heat exchanger)
48 Gas duct 49 Air heater 50 Denitration catalyst 51 Dust treatment device 52 Induction fan 53 Chimney 100, 100A, 100B, 100C Combustion burner insertion jig CB Wire pulling device R Rail S Slider W1 Retraction wire (linear member)
W2 Hanging wire

Claims (7)

A combustion burner insertion jig that is detachably attached to a front plate flange from which a plurality of bolts provided outside the furnace wall of the furnace wall of the wind box that is disposed on the furnace wall and can accommodate the combustion burner,
A base having a planar first surface opposite the front plate flange in a mounted state;
A bolt insertion portion for inserting the bolt protruding from the front plate flange in the mounted state from the first surface side of the base portion to the second surface side opposite to the first surface;
A combustion burner insertion jig comprising: a connecting portion provided to be connected to the second surface side of the base portion and capable of connecting a linear member for drawing the combustion burner into the wind box. The combustion burner insertion jig according to claim 1, wherein the base portion has a shape extending in a long side direction, and has a reinforcing portion formed in the long side direction on the second surface. The base is a plate-shaped part formed on one of a plate-shaped member having an L-shaped cross section or an angle steel,
The combustion burner insertion jig according to claim 2, wherein the reinforcing portion is a plate-shaped member formed on the other of the L-shaped plate-shaped member or the angle steel. The bolt insertion portion has at least one of a circular hole portion, an oval hole portion, and a cutout portion in which a part of the base portion is cut out. The jig for inserting a combustion burner according to one item. The combustion burner insertion jig according to claim 4, wherein the bolt insertion portion includes the circular hole provided in one place and the oval hole provided in another place. The combustion burner insertion jig according to claim 4, wherein all of the bolt insertion portions are the elliptical holes. The combustion burner insertion jig according to claim 4, wherein all of the bolt insertion portions are notched portions in which a part of the base portion is notched.

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