JP3714540B2 - Stress reduction mechanism in the heat storage part of regenerative burner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides a heat storage section of a regenerative burner configured to configure a heat storage section in which both sides are supported by a breathable support plate in a laterally arranged air supply / exhaust flow path, and the heat storage section is filled with a heat storage body It is related with the stress reduction mechanism in.
[0002]
[Prior art]
The regenerative burner system uses two burners with a heat storage section filled with a heat storage body such as alumina balls in the internal air supply / exhaust flow path as a set to perform switching combustion alternately, It is a high-efficiency combustion system that recovers waste heat using a heat storage body.
[0003]
FIG. 7 shows a conventional configuration example of a heat storage section in a regenerative burner, in this case, a heat storage section in which the supply / exhaust flow paths are arranged in the lateral direction and the supply / exhaust flows in a substantially horizontal direction. In these drawings, symbol a is an air supply / exhaust flow path, and a heat storage section c is configured by supporting both sides in the air supply / exhaust flow path a by a breathable support plate b such as a punching plate. A fuel supply pipe d is installed through. The heat storage section c is configured to be filled with a heat storage body f such as an alumina ball from a filling port e provided in the upper part of the air supply / exhaust flow path a, and the lid g is closed after filling. The symbol h is a burner tile.
[0004]
In the above configuration, when the burner on the side shown in the figure is combusted, the combustion air flows in the right direction in the heat storage section c as indicated by the solid line in the figure, and at this time, heat is stored in the heat storage body f in the previous cycle. As the heat is recovered, the fuel flows to the right in the fuel supply pipe d and is mixed on the downstream side to be burned.
[0005]
On the other hand, when the combustion of the burner on the side shown in the figure is stopped, that is, at the time of exhaust, the exhaust gas generated by the combustion on the other burner side flows in the left direction in the heat storage section c as indicated by the broken line in the figure, Heat storage is performed on the heat storage body 7.
[0006]
[Problems to be solved by the invention]
The heat accumulator c is a completely closed space, and the heat accumulator f is filled in a dense state, so that the heat accumulator f expands due to waste heat recovery, and flows due to the flow of combustion air and exhaust gas. As a result, a phenomenon occurs in which the heat storage bodies f are pressed against each other, and an external force is generated between each heat storage body f and the air-permeable support plate b in the heat storage section c. The burner tile h, the air-permeable support plate b, and the fuel supply pipe d may be damaged or deformed, or the heat storage body f may be worn.
The present invention aims to solve such problems.
[0007]
[Means for Solving the Problems]
In order to solve the above-described problem, the present invention has a configuration in which a heat storage unit in which both sides are supported by a breathable support plate is configured in a supply / exhaust flow channel arranged in a lateral direction, and the heat storage unit is filled in the heat storage unit. The at least one air-permeable support plate forms an inclined portion whose upper side faces the outside of the heat storage portion, and escapes corresponding to the upper portion of the air-permeable support plate constituting the inclined portion in the air supply / exhaust flow path. A stress reduction mechanism in the heat storage part of the regenerative burner that composes the space part is proposed.
[0008]
In the above configuration, in the present invention, the breathable support plate is inclined at the same angle to form an inclined portion, or the entire is inclined, but the inclination angle is different between the upper portion and the lower portion, or only at the lower portion. An inclined part can be constituted.
[0009]
Further, in the present invention, in the above-described configuration, a fuel supply pipe is installed through the heat storage section in the supply / exhaust flow path, and the fuel supply pipe is provided with a guide protrusion at least on the lower side of the air-permeable support plate that forms the inclined section. Propose that.
[0010]
In the present invention, in the above-described configuration, the fuel supply pipe is installed through the heat storage section in the supply / exhaust flow path, and at least on the side of the air-permeable support plate that configures the inclined section, the fuel supply pipe extends from the lower wall of the supply / exhaust flow path. It is proposed to provide a guide plate in the lower direction of
[0011]
In the present invention, the phenomenon in which the heat storage bodies are pressed against each other due to the above-described causes occurs, and when an external force in the flow direction of the air supply / exhaust occurs between each heat storage body and the air-permeable support plate, the inclined ventilation In the heat storage body in contact with the conductive support plate, an upward component force is generated by the action of an external force.
[0012]
At this time, in the air supply / exhaust flow path, a relief space portion is formed corresponding to the upper portion of the inclined air-permeable support plate, so that the heat storage body in contact with the air-permeable support plate is It gradually moves into the upper clearance space, and in this way, the external force due to the phenomenon that the heat storage bodies are pressed against each other, and hence the stress generated between the heat storage body and the air-permeable support plate is reduced.
[0013]
When the fuel supply pipe is installed through the heat storage section in the supply / exhaust flow path, as described above, when the heat storage body moves upward due to the component force, it is also between the heat storage body and the lower part of the fuel supply pipe. Although external force and stress are generated due to this, if a guide projection is provided at the lower part of the fuel supply pipe or a guide plate is provided from the lower wall of the supply / exhaust flow path to the lower part of the fuel supply pipe, these can be used to store heat. Since the body is guided to the left and right sides of the fuel supply pipe and moves upward, the external force between them and the respective stresses can be reduced.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with reference to FIGS.
1 and 2 show a first embodiment of a stress reduction mechanism in a heat storage section of a regenerative burner according to the present invention.
In the figure, reference numeral 1 denotes a supply / exhaust flow path arranged in the horizontal direction, and heat storage in which the supply / exhaust air passes through the supply / exhaust flow path 1 substantially horizontally by air-permeable support plates 2a, 2b such as punching plates. The fuel supply pipe 4 which comprises the part 3 and passes through the thermal storage part 3 is installed.
In the drawing, the left breathable support plate 2 a is inclined at the same angle as a whole and constitutes an inclined portion 5 whose upper side faces outward of the heat storage portion 3. In correspondence with the upper part of the air-permeable support plate 2, an escape space part 6 is formed in the upper part of the heat storage part 3. In this embodiment, the escape space portion 6 is configured in the filling port 8 of the heat storage body 7 and is provided with a lid 9 on the upper portion thereof. It can also be configured separately. In the figure, reference numeral 10 denotes a burner tile.
[0015]
In the above configuration, as shown in FIG. 1, the heat storage unit 3 is closely packed with a heat storage body 7 such as an alumina ball from the filling port 8, and the lid 9 is closed after the filling, but the heat storage body 7 is The filling is performed up to a height at which the escape space 6 is formed below the filling port 8.
[0016]
In the above configuration, there is a phenomenon in which the heat storage bodies 7 are pressed against each other due to expansion of the heat storage bodies 7 due to waste heat recovery, flow due to the flow of combustion air or exhaust gas, and the like. In addition, an external force is generated between the air-permeable support plates 2a and 2b and the burner tile 10, and among these, an external force in the flow direction of the air supply / exhaust is generated between the heat storage body 7 and the air-permeable support plates 2a and 2b.
[0017]
In this case, the heat storage body 7 that is in contact with the inclined air-permeable support plate 2a generates a component force upward due to the action of an external force. Therefore, the heat storage body 7 that is in contact with the air-permeable support plate 2a is The component force gradually moves into the upper clearance space 6 as shown in FIG. For this reason, the external force due to the phenomenon in which the heat storage bodies 7 are pressed against each other, and the stress generated in the heat storage body 7, the air-permeable support plates 2a, 2b, the burner tiles 10 and the like due to the action are reduced, and the deformation and damage are prevented. Is done.
[0018]
FIG. 3 shows a second embodiment of the stress reduction mechanism in the heat storage section of the regenerative burner according to the present invention.
Since the second embodiment is different from the first embodiment only in the configuration relating to the air-permeable support plate 2a, the second embodiment is different from the first embodiment in FIG. 3 showing the second embodiment. Corresponding components are denoted by the same reference numerals as those in FIGS. 1 and 2, and redundant description is omitted.
In other words, in the second embodiment, the breathable support plate 2a has an upper portion that is the same as the conventional one, and the inclined portion 5 is formed only at the lower portion.
In the case where the inclined portion 5 is configured only at the lower portion as described above, when the heat storage body 7 in contact with the lower inclined portion 5 moves upward due to the above-described component force, the heat storage body above the upper portion is stored. 7 is also moved upward at the same time, as in the first embodiment, the external force due to the phenomenon that the heat storage bodies 7 are pressed against each other, and the action thereof, the heat storage body 7, the air-permeable support plates 2a and 2b, the burner tile 10, etc. Is reduced, and its deformation and damage are prevented.
[0019]
FIG. 4 shows a third embodiment of the stress reduction mechanism in the heat storage section of the regenerative burner according to the present invention.
Since the third embodiment differs from the first and second embodiments only in the configuration relating to the air-permeable support plate 2a, the first embodiment is shown in FIG. 4 showing the third embodiment. The same reference numerals as those in FIGS. 1 and 2 are given to the constituent elements corresponding to those in FIG.
That is, in the third embodiment, the breathable support plate 2a is inclined as a whole as in the first embodiment, but the upper and lower portions have different inclination angles. is there.
In this structure, the component force with respect to the thermal storage body 7 can be adjusted by making it differ by the upper part and the lower part of the air permeable support plate 2a.
[0020]
Next, FIG. 5 shows a fourth embodiment of the stress reduction mechanism in the heat storage section of the regenerative burner according to the present invention, in this case, the fuel supply when the fuel supply pipe 4 passing through the heat storage section 3 is installed. An embodiment related to a pipe 4 is shown. In this embodiment, a guide projection 11 is provided in the lower part of the fuel supply pipe 4 on the air-permeable support plate 2a side in FIGS.
[0021]
Due to the above-described causes, a phenomenon occurs in which the heat storage bodies are pressed against each other, and as described above, when the heat storage body 7 moves upward due to a component force, the heat storage body 7 and the lower part of the fuel supply pipe 4 are interposed. However, if the guide protrusion 11 is provided at the lower part of the fuel supply pipe 4 as in this embodiment, the heat accumulator 7 has a fuel as shown by an arrow in the figure. Since it is guided to the left and right sides of the supply pipe 4 and moves upward, the external force between them and the respective stresses can be reduced.
[0022]
In this way, the fifth embodiment shown in FIG. 6 is used instead of the fourth embodiment shown in FIG. 5 so that the heat storage body 7 is guided to the left and right sides of the fuel supply pipe 4 and moves upward. The form of can be applied.
That is, in the fifth embodiment shown in FIG. 6, the guide plate 13 is provided from the lower wall 12 (the burner tile is not shown) of the air supply / exhaust flow path 1 toward the lower part of the fuel supply pipe 4. Then, the heat storage body 7 is guided by the guide plate 13 to the left and right sides of the fuel supply pipe 4 as shown by the arrows in the drawing and moves upward, so that the external force between them and the respective stresses can be reduced. Can be reduced.
[0023]
In the above embodiment, the inclined portion is configured only on one side of the air-permeable support plates on both sides for configuring the heat storage portion in the air supply / exhaust flow path arranged in the lateral direction. In this case, the escape space portion is formed corresponding to the breathable support plates on both sides.
[0024]
【The invention's effect】
Since the present invention is as described above, in the heat storage section of the regenerative burner, there is a phenomenon in which the heat storage bodies are pressed against each other due to expansion due to waste heat recovery of the heat storage body, flow due to the flow of combustion air or exhaust gas, and the like. Therefore, even if an external force is generated between each heat storage body and the air-permeable support plate in the heat storage section, and stress is generated inside each element due to the action, they are separated from the inclined portion of the air-permeable support plate and the escape space. It is possible to effectively reduce the thickness of the burner tile, the air-permeable support plate and the fuel supply pipe, and to reduce the wear of the heat storage body.
The external force described above and the external force and stress between the fuel supply pipe and the heat accumulator caused by the operation of the present invention for reducing the stress are supplied to the heat accumulator by the guide protrusion or the guide plate. It can be reduced by guiding to the left and right sides of the tube.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing the configuration and operation of a first embodiment of a stress reduction mechanism in a heat storage section of a regenerative burner to which the present invention is applied.
FIG. 2 is a longitudinal sectional view showing the configuration and operation of the first embodiment of the stress reduction mechanism mechanism in the heat storage section of the regenerative burner to which the present invention is applied in a state in which a phenomenon in which the heat storage body pushes occurs. FIG. 3 is a longitudinal sectional view showing the configuration and operation of a second embodiment of a stress reduction mechanism in a heat storage section of a regenerative burner to which the present invention is applied.
FIG. 4 is a longitudinal sectional view showing the configuration and operation of a third embodiment of a stress reduction mechanism in a heat storage section of a regenerative burner to which the present invention is applied.
FIG. 5 is a cross-sectional view of a main part showing the configuration and operation of a fourth embodiment of a stress reduction mechanism in a heat storage part of a regenerative burner to which the present invention is applied.
FIG. 6 is a cross-sectional view of a main part showing the configuration and operation of a fifth embodiment of a stress reduction mechanism in a heat storage part of a regenerative burner to which the present invention is applied.
FIG. 7 is a longitudinal sectional view showing the configuration and operation of a heat storage section of a conventional regenerative burner.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Supply / exhaust flow path 2a, 2b Breathable support plate 3 Heat storage part 4 Fuel supply pipe 5 Inclined part 6 Escape space part 7 Heat storage body 8 Filling port 9 Lid 10 Burner tile 11 Guide protrusion 12 Lower wall 13 Guide plate

Claims (6)

In the air supply / exhaust flow path arranged in the lateral direction, a heat storage part that supports both sides by a breathable support plate is configured, and a heat storage body is filled in the heat storage part, and at least one of the breathable support plates is more A regenerator characterized in that the upper part forms an inclined part toward the outside of the heat storage part, and the air supply / exhaust flow path has an escape space part corresponding to the upper part of the air-permeable support plate constituting the inclined part. Stress reduction mechanism in heat storage part of TIB burner The stress-reducing mechanism in the heat storage part of the regenerative burner according to claim 1, wherein the breathable support plate is entirely inclined at the same angle to form an inclined part. The stress-reducing mechanism in the heat storage part of the regenerative burner according to claim 1, wherein the air-permeable support plate is inclined as a whole, and the inclination angle is different between the upper part and the lower part. The stress-reducing mechanism in the heat storage part of the regenerative burner according to claim 1, wherein the air-permeable support plate has an inclined part only at the lower part. The fuel supply pipe is installed through the heat storage section in the air supply / exhaust flow path, and the fuel supply pipe is provided with a guide projection at a lower part on the side of the air-permeable support plate that constitutes at least an inclined section. The stress reduction mechanism in the heat storage part of the regenerative burner according to any one of 4 A fuel supply pipe was installed through the heat storage section in the supply / exhaust flow path, and a guide plate was provided from the lower wall of the supply / exhaust flow path toward the lower portion of the fuel supply pipe on at least the air-permeable support plate side that formed the inclined section. The stress reduction mechanism in the heat storage part of the regenerative burner according to any one of claims 1 to 4,

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