JP3712503B2 - Burner furnace wall tube structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, a bent furnace wall tube is arranged on a furnace wall composed of a large number of furnace wall tubes arranged adjacent to each other in a plane, and fuel and air (hereinafter simply referred to as fuel) are placed in the furnace. The present invention relates to a burner part furnace wall tube structure in which an opening for installing a burner to be fed is provided, and particularly to a burner part furnace wall structure suitable for providing an opening of a round burner at a corner part of a furnace wall. .
[0002]
[Prior art]
In order to provide the furnace wall with a round burner that feeds fuel into the furnace of the boiler, a part of the furnace wall that is formed by arranging the furnace wall tubes adjacent to each other is installed through the furnace wall. It is necessary to have a burner section furnace wall tube structure in which an opening of the burner is provided.
[0003]
As shown in FIG. 5, in a boiler in which openings 06 of a plurality of round burners 05 are provided in the longitudinal and / or lateral direction of the front wall 03 and / or the rear wall 02 of a flat furnace wall 01. In the case of providing the burner section furnace wall tube structure 010, the burner section furnace wall tube structure 010 in which openings formed as shown in FIGS. ing.
[0004]
That is, as shown in the figure, when such a burner part furnace wall tube structure 010 is provided, the furnace wall tube 07 forming the furnace wall 01 disposed at the position where the opening 06 is provided is first shown in FIG. As shown in the figure, it is bent in the left-right direction to form a space for the opening 06 of the round burner 05 in the left-right bending part, and is provided in the front-rear direction perpendicular to the furnace wall 01, and the throat part of the opening 06 is In order to support the refractory material 09 to be formed, as described above, the furnace wall tube 07 bent in the left-right direction at the peripheral portion of the opening portion 06, and as shown in FIG. 6 and FIG. The furnace wall tube 07 is vertically and horizontally symmetrical at the periphery of the opening 06, and is also arranged so as to overlap in the front-rear direction, and at the periphery of the opening 06, A three-dimensionally arranged bar that protrudes toward the outside of the furnace And so as to form a naphthalocyanine section furnace tube structure 010.
[0005]
In these drawings, 08 is a straight tube furnace wall tube that does not form the opening 06 and forms only the furnace wall 01, 04 is a side wall formed only by the straight tube furnace wall tube 08, 011 is in the furnace, Reference numeral 012 denotes the above-described fuel fed into the furnace 011, 013 denotes a flame generated in the furnace 011, and 014 denotes a stud embedded in the refractory material 09.
[0006]
Such a burner section furnace wall tube structure 010 is provided on a flat furnace wall 01 as shown in FIG. 5, and fuel 012 is sent from the opening 06 of the round burner 05 toward the center of the furnace 011 to generate steam. In the case of generating, there is no particular problem, but such a burner part furnace wall tube structure 010 is provided with an opening 06 of a round burner 05 in the corner part of the furnace 011 as shown in FIG. A problem arises when it is used in a boiler in which fuel 012 is fed into the furnace 011 so that the furnace 011 is swirled and swirled.
[0007]
That is, when the opening 06 of the round burner 05 is provided in the corner portion of the furnace 011 to burn, the flame 013 that burns and swirls in the furnace 011 is swirled as shown in FIG. This swirling flame 013 tends to approach the furnace wall 01 that forms the corner portion of the furnace 011, particularly the furnace wall 01 on the downstream side of the flame. It comes in direct contact with the furnace wall 01, and there is a possibility that burnout of the furnace wall 01 will be increased.
[0008]
In order to avoid this possibility, the front end of the refractory material 09 forming the opening 06 of the round burner 05 is provided so as to be advanced toward the furnace 011 side, and the front end of the opening 06 is It arrange | positions so that it may become the A point shown in FIG. 2, and the flame 013 does not hit the downstream furnace wall 01 directly, and burning-out is prevented.
In this case, the thickness of the refractory material 09 forming the opening 06 is increased in the front-rear direction, and in particular, the weight of the portion protruding into the furnace 011 is increased, overlapped behind the furnace wall 01, and rearward In the furnace wall tube 07 that forms the protruding three-dimensional furnace wall 01, it becomes difficult to support the weight of the refractory material 09, and the refractory material 09 is not sufficiently cooled. There is a problem that 09 may burn out.
[0009]
Furthermore, in order to support the increasing weight of the refractory material 09, the furnace wall tube 07 is superimposed in the front-rear direction and is arranged in three dimensions behind the furnace wall 01 so as to support the weight of the refractory material 09. In order to increase the supporting force of the opening 06, a large number of additional installations are performed.
[0010]
In such a case, the bending of the furnace wall tube 07 for forming the opening 06 is further increased, and further, the length of the furnace wall tube 07 is increased, resulting in an increase in cost.
In particular, when the opening 06 of the round burner 05 is arranged above and below the furnace 011 to form a compact boiler structure, the upper round burner 05 and the lower round burner 05 When the required furnace wall tube 07 is bent back with the opening 06, the bending radius must be reduced, and a large number of bends with a small bending angle must be used. As the pressure increases, the pressure loss of the fluid flowing in the furnace wall tube 07 increases, resulting in a problem that the flow rate in the tube is reduced.
[0011]
[Problems to be solved by the invention]
In order to eliminate the above-described problems of the conventional burner section furnace wall tube structure in which a round burner opening is provided at the corner of the furnace wall, the present invention is a flame that burns and swirls in the furnace. The tip of the refractory material forming the opening is extended to the inside of the furnace so that the front end of the opening of the round burner is advanced to the inside of the furnace so that it does not hit the furnace wall on the downstream side of the flame. In particular, even if the weight of the refractory material protruding inside the furnace increases, the bending of the furnace wall tube increases and the length becomes longer. Even in the case of a boiler with a compact structure, it is possible to reduce the bending radius at the time of bending back required between the upper round burner and the lower round burner, In addition, many furnace wall tubes that require the use of a large number of bends with a small bending angle are used. There is no need for additional installation, the refractory material that protrudes sufficiently inside the furnace at the opening can be sufficiently supported, and the refractory material can be cooled sufficiently, and there is no possibility of burning. An object of the present invention is to provide a burner part furnace wall tube structure in which the pressure loss of the flowing fluid does not increase and the flow rate in the tube is not reduced.
[0012]
[Means for Solving the Problems]
For this reason, the burner section furnace wall tube structure of the present invention is the following means.
[0013]
(1) The furnace wall tube provided around the opening for providing the opening of the burner is bent at the corner of the furnace wall formed by arranging a plurality of furnace wall tubes in the following manner. Thus, a furnace wall was formed, and a burner part furnace wall tube structure was also made which can also be used as a support material for the opening.
[0014]
(I) from the furnace wall of the corner part toward the opposite corner part, bent and disposed so as to project inside the furnace, forming a space for providing an opening for generating a swirling flow in the furnace;
(Ii) It was arranged so as to be used also as a support material for supporting a refractory material which was provided to be advanced from the furnace wall toward the inside of the furnace so as to form the opening of the burner.
[0015]
In addition, the furnace wall tube that is bent inside the furnace has a space for providing an opening that is bent in the left-right direction and is symmetrical in the left-right direction in order to provide a space for the opening at the periphery of the opening. It is preferable that the furnace wall be formed in a three-dimensional arrangement on the inner side of the furnace at the periphery of the opening while being formed and superimposed in the front-rear direction.
Further, since the furnace wall tube arranged at the peripheral portion of the opening is arranged to be expanded left and right in the upper and lower portions in the vicinity of the opening, this portion is used for preventing the burnout of the fin of the furnace wall tube. It is preferable to provide a refractory material that is fixed with a stud.
In addition, the opening supported by the furnace wall tube supports the refractory material forming the opening with the furnace wall tube arranged so that it can be cooled almost uniformly, and a stud is also inserted into the refractory material. It is preferable that it can be supported and cooled.
[0016]
The burner part furnace wall tube structure of the present invention is the above-mentioned means (1),
a. The burner opening can be arranged by advancing to the inside of the furnace, and the fuel swirled by the fuel supplied to the furnace by this burner does not hit the furnace wall on the downstream side of the flame. The possibility of burning the furnace wall due to the flame can be reduced, and even if the weight of the refractory material forming the opening that is advanced to the inside of the furnace increases as the burner advances to the inside of the furnace, Since it is supported by the furnace wall tube that has been moved forward, the bending process is increased, and it becomes possible to sufficiently support the furnace wall tube without adding a furnace wall tube having a long length. Cooling can be sufficient and the possibility of burnout can be further reduced.
[0017]
Furthermore, even when burners are installed on the top and bottom of the furnace to make a boiler with a compact structure, the furnace wall tube is bent and arranged so as to protrude inside the furnace, The bend used can be reduced, and the bending radius required when the furnace wall tube is bent back between the upper and lower round burners can be made large. Further, since it is not necessary to use a bend with a small bending angle, the pressure loss of the fluid flowing through the furnace wall tube does not increase, and the flow rate in the tube can be prevented from being reduced.
[0018]
The burner section furnace wall tube structure of the second aspect of the present invention is the following means.
(2) By means of the above (1), the furnace wall tube provided extending from the opening toward the inside of the furnace is disposed without protruding toward the furnace inside the furnace wall around the opening, and the opening Is supported by a rear furnace wall tube that forms a furnace wall behind the furnace wall tube. In addition, it is preferable that the furnace wall tube supported by the rear furnace wall tube is supported with a support hardware interposed between the furnace wall tube and the rear furnace wall tube.
[0019]
The burner section furnace wall tube structure according to the present invention has the above-described a. In addition to this, the furnace wall tube provided extending from the opening toward the inside of the furnace is firmly fixed by the rear furnace wall tube.
Also, a thick refractory material interposed between the furnace wall tube and the rear furnace wall tube and protecting the fins of the furnace wall tube and the rear furnace wall tube, together with the stud inserted therein, Since it is firmly fixed by the rear furnace wall tube and is further cooled by these, the possibility of burning can be further reduced.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a burner section furnace wall tube structure of the present invention will be described with reference to the drawings.
FIG. 1 is a horizontal sectional view of a boiler suitable for carrying out the burner part furnace wall tube structure of the present invention, in which each of the four corners of the furnace wall is provided with openings of round burners, FIG. 2 is a plan view of the opening cross section, and shows the relationship between the opening of the corner, the furnace wall tube, and the rear furnace wall tube, and FIG. 3 is a front view of the lowermost opening as viewed from outside the furnace. FIG. 4 is a side view of the cross section of the opening at the middle stage and the lowermost stage, and shows the relationship between the furnace wall pipe and the rear furnace wall pipe in the vicinity of the opening. It is a figure which shows arrangement | positioning relationship.
[0021]
As shown in the figure, the corners at the four corners of the furnace wall 1 are provided with openings 3 of a round burner 2, and in the vertical direction of the corners, the openings are partially omitted over three steps. 3 is provided.
The round burner 2 has its tip at the inside of the furnace until the fuel 11 supplied from the tip of the opening 3 to the furnace 4 burns and the flame 12 swirling in the furnace 4 does not hit the furnace wall 1. It is arranged to move forward to the 4th side.
Further, the furnace wall 1 other than the corner part and the furnace wall 1 in the corner part away from the opening part 3 are arranged adjacent to each other and are flattened by the rear furnace wall pipe 5 in which the fins protruding from both sides are superposed. Try to form.
[0022]
The furnace wall 1 around the corner portion where the opening 3 of the round burner 2 is provided is such that the furnace wall tube 6 disposed around the opening 3 faces the corner portion facing the furnace wall 1 of the corner portion. As shown in FIG. 4, it is bent so as to project toward the furnace 4 side, and as shown in FIG. 3, it is also bent and arranged in the left-right direction, and an opening 3 is formed in this bent portion. A space is provided to provide a gap.
That is, the furnace wall tube 6 is bent toward the inside 4 of the furnace, and at the peripheral part of the opening 3, the furnace wall pipe 6 is also bent in the left-right direction to generate a flame 12 that swirls in the furnace 4 and swirls. The opening 3 of the round burner 2 is installed so that the flame 12 is not directly hitting the furnace wall 1.
[0023]
Therefore, the furnace wall 1 that protrudes toward the furnace 4 side, is vertically and horizontally symmetrical, and is also superimposed in the front-rear direction to form a three-dimensional arrangement at the peripheral edge of the opening 3, It will be formed forward.
In addition, a refractory material 7 is provided in this space so as to project toward the furnace 4 side.
The refractory material 7 provided so as to project toward the furnace interior 4 side is supported by a furnace wall tube 6 that is three-dimensionally arranged to form the furnace wall 1, and is inserted into the refractory material 7. While being fixed by the stud 8, it cools by these.
[0024]
For this reason, the furnace wall tube 6 and the stud 8 for cooling the refractory material 7 are arranged so as to cool the refractory material 8 substantially uniformly so as to support the opening 3.
Furthermore, the furnace wall tube 6 provided to project from the opening 3 toward the furnace 1 side is disposed without projecting the furnace wall 1 around the opening 3 toward the furnace 1 side. It is arrange | positioned in the position which remove | deviated from, and it is made to be supported by the back furnace wall pipe 5 which forms the plane part of the furnace wall 1. FIG.
The furnace wall pipe 6 supported by the rear furnace wall pipe 5 is supported by interposing a support metal 9 between the rear furnace wall pipe 5.
[0025]
In addition, the furnace wall tube 6 arranged at the peripheral edge of the opening 3 is arranged to be expanded left and right as shown in FIG. In order to prevent burning of the fins of the furnace wall tube 6, a refractory material 7 fixed with a large number of studs 8 is provided.
[0026]
The burner section furnace wall tube structure of the present embodiment is advanced to the furnace 1 side by the above-described configuration, and the front end of the opening 3 of the round burner 2 is advanced to the point A shown in FIG. The fuel 11 supplied into the furnace 4 from the opening 3 is combusted and the flame 12 swirling in the furnace 4 hits the furnace wall 1 on the downstream side of the flame 12. In addition, the burning of the furnace wall 1 by the flame 12 can be reduced.
[0027]
Moreover, even if the weight of the refractory material 7 forming the opening 3 that is moved forward to the furnace 4 side increases as the tip of the opening 3 is moved forward, it moves forward to the furnace 4 side. Since it is effectively supported by the furnace wall tube 6 and the stud 8 embedded in the refractory material 7, the shape of the opening 3 is maintained as designed even at high temperatures. In addition, burnout can be reduced.
[0028]
Further, the bending work is increased, and it becomes possible to sufficiently support the heavy refractory material 7 without additionally installing the furnace wall tube 6 having a long length, and the refractory material 7 can be sufficiently cooled. The possibility of burning out can be further reduced.
Furthermore, even when the round burner 2 is installed so as to be arranged above and below the furnace 4 and to have a compact structure, the furnace wall tube 6 projects to the furnace 4 side. Therefore, the bend used in the bent portion can be reduced and, as shown in FIG. 4, the upper round burner 2 and the lower round burner 2 are arranged. The bending radius required when the furnace wall tube 6 is bent back can be large, and it is not necessary to use a bend with a small bending angle.
For this reason, the pressure loss of the fluid flowing in the furnace wall pipe 6 is not increased, and the reduction of the pipe flow rate can be prevented.
[0029]
Since the furnace wall tube 6 that extends from the opening 3 toward the inside of the furnace 4 is supported by the rear furnace wall tube 5 installed behind the furnace wall tube 6 with the support metal 9 interposed therebetween. The refractory material 7 supported and cooled by the furnace wall tube 6 and the rear furnace wall tube 5 is firmly held.
Furthermore, a thick refractory material 7 interposed between the furnace wall tube 6 and the rear furnace wall tube 5 and protecting the fins of the furnace wall tube 6 and the rear furnace wall tube 5 is inserted into the stud 8. At the same time, it is firmly fixed by the furnace wall tube 6 and the rear furnace wall tube 5 and further cooled by these, so the possibility of burning can be further reduced.
[0030]
【The invention's effect】
As described above, the burner section furnace wall tube structure of the present invention has a furnace wall tube around the opening that forms an opening for providing a burner at the corner of the furnace wall composed of a plurality of furnace wall tubes. However, from the furnace wall of the corner part toward the opposite corner part, it is arranged by being bent so as to project inside the furnace, forming a space for installing the opening, and from the opening for providing the burner It was set as the structure which doubles as the support material which supports the refractory material which forms the opening part extended and provided toward the furnace inner side.
[0031]
As a result, the opening of the burner can be arranged by advancing to the inside of the furnace, and the flame that is swirled by the fuel supplied into the furnace with this burner does not hit the furnace wall on the downstream side of the flame, The possibility of burning the furnace wall by this flame can be reduced.
[0032]
Also, as the weight of the refractory material arranged to advance to the inside of the furnace increases as the round burner advances to the inside of the furnace, it is supported by the furnace wall tube arranged to advance to the inside of the furnace. More bending work, longer furnace wall pipes can be supported without additional installation, and the refractory can be cooled sufficiently, further reducing the possibility of burning. be able to.
[0033]
In addition, even when the burner is installed in the top and bottom of the furnace, and with a compact boiler structure, the furnace wall tube is bent and arranged so as to protrude inside the furnace. Therefore, the bend used for the bent portion can be reduced, and the bending radius required for bending back between the upper round burner and the lower round burner should be large. In addition, since it is not necessary to use a bend with a small bending angle, the pressure loss of the fluid flowing through the furnace wall tube does not increase, and a reduction in the flow rate in the tube can be prevented.
[0034]
Further, the burner part furnace wall tube structure of the present invention is disposed without the furnace wall tube provided extending from the opening toward the furnace inside without protruding toward the furnace inside the furnace wall around the opening, It was set as the structure supported by the back furnace wall pipe which forms the furnace wall behind a furnace wall pipe in the circumference | surroundings of an opening part.
[0035]
As a result, the furnace wall tube that projects from the opening toward the inside of the furnace is firmly fixed to the rear furnace wall tube.
Also, a thick refractory material interposed between the furnace wall tube and the rear furnace wall tube and protecting the fins of the furnace wall tube and the rear furnace wall tube, together with the stud inserted therein, Since it is firmly fixed by the rear furnace wall tube and cooled, the possibility of burning out can be reduced.
[Brief description of the drawings]
FIG. 1 is a horizontal sectional view of a boiler suitable for implementing the burner part furnace wall tube structure of the present invention, in which round burner openings are provided at four corners of the furnace wall;
FIG. 2 is a plan view of the opening cross section shown in FIG. 1, showing the relationship between the opening of the corner portion, the furnace wall tube, and the rear furnace wall tube;
FIG. 3 is a front view of the lowermost opening of the opening shown in FIG. 1, showing the relationship between the opening, the furnace wall tube, and the rear furnace wall tube;
FIG. 4 is a side view of the middle and lowermost openings in the opening shown in FIG. 1, showing the positional relationship between the furnace wall pipe and the rear furnace wall pipe in the vicinity of the opening;
FIG. 5 is a horizontal sectional view of a boiler in which a round burner opening is provided on a flat furnace wall;
6 is a plan view of the opening shown in FIG. 5, showing the relationship between the opening of the corner portion, the furnace wall pipe, and the rear furnace wall pipe;
FIG. 7 is a plan view of the opening shown in FIG. 5, showing the relationship between the opening of the corner, the furnace wall tube, and the rear furnace wall tube;
8 is a side view of the middle and lowermost openings in the opening shown in FIG. 1, and is a view showing the positional relationship between the furnace wall pipe and the rear furnace wall pipe in the vicinity of the opening.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Furnace wall 2 Burner 3 Opening part 4 Furnace 5 Rear furnace wall pipe 6 Furnace wall pipe 7 Refractory material 8 Stud 9 Support metal fitting 10 Burner part furnace wall pipe structure 11 Fuel 12 Flame 01 Furnace wall 02 Rear wall 03 Front wall 04 Side wall 05 Burner 06 Opening 07 Furnace wall tube 08 Straight tubular furnace wall tube 09 Refractory material 010 Burner part furnace wall tube structure 011 Furnace 012 Fuel 013 Flame 014 Stud

Claims (2)

In a furnace burner section tube wall structure of a boiler in which the furnace wall tube is bent to provide a burner opening in a furnace wall corner composed of a plurality of furnace wall tubes, a furnace around the opening The furnace wall tube forming the wall is bent and arranged to form the opening that extends toward the inside of the furnace and is provided with an opening end that generates a circulating flow, and the furnace wall A burner section furnace wall tube structure characterized in that it supports the opening provided so as to project from the burner section. The furnace wall tube provided by swinging out from the opening toward the inside of the furnace is disposed without protruding toward the inside of the furnace around the opening, and a flat furnace wall is provided behind the furnace wall tube. The burner section furnace wall tube structure according to claim 1, wherein the burner section furnace wall tube structure is supported by a rear furnace wall tube that forms a tube.

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