Regenerative burner device

Abstract

To provide a regenerative burner device capable of preventing damage by suppressing overheat of a communication pipe for communicating furnace insides of air supply / exhaust chambers in which a heat storage body is arranged with each other by a pipe.SOLUTION: Provided is a regenerative burner device 10 having heat storage bodies 13, 23 for recovering heat from the combustion gas burned in the furnace S and heating the combustion air, the regenerative burner device 10 including a pair of burners 1 and 2. Each of the burners 1, 2 is provided with a fuel pipe 11, 21 for supplying fuel, and an intake and exhaust pipe 12, 22 arranged near the fuel pipe 11, 21 for supplying combustion air and exhausting combustion gas. One end of the intake and exhaust pipe 12, 22 communicates with the inside of the furnace, and the other end thereof communicates with the intake and exhaust chamber 14, 24 in which the heat storage body 13, 23 is arranged. The regenerative burner device 10 further includes a communication pipe 18 for communicating the spaces 14a, 24a of the intake and exhaust chamber 14, 24 formed on the furnace interior S side of the heat storage body 13, 23 of the pair of burners 1, 2. The communication pipe 18 is provided with an introduction pipe 19 for introducing cooling air.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a regenerative burner device.

Background Art

[0002] Conventionally, in combustion devices such as heating furnaces and combustion furnaces, for the purpose of energy saving, a regenerative burner device is known in which a heat storage body is provided in the burner to recover the heat of the combustion gas burned in the furnace and to heat the combustion air. And Patent Document 1 discloses a technique for burning unburned fuel in a regenerative burner device by feeding combustion air into the burner on the suction side. Further, Patent Documents 2 and 3 disclose a configuration in which the inner sides of the air supply and exhaust chambers where the heat storage body is disposed are communicated with each other by a pipe, so that a part of the preheated air on the combustion side is sucked to the suction side to obtain a similar effect.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0004] Here, as shown in Patent Documents 2 and 3, when the inner sides of the air supply and exhaust chambers where the heat storage body is disposed are communicated with each other by a pipe, high-temperature preheated air flows through this communication pipe. Therefore, there is a problem that events such as the communication pipe being thermally deformed or the communication pipe being damaged and the preheated air flowing through it leaking occur.

[0005] Therefore, an object of the present invention is to provide a regenerative burner device capable of suppressing overheating of a communication pipe that communicates the inside of a furnace of an air supply and exhaust chamber where a heat storage body is disposed with each other by a pipe, and preventing damage.

Means for Solving the Problems

[0006] The present invention is a regenerative burner device provided with a heat storage body that recovers the heat of combustion gas burned in a furnace and heats combustion air, The regenerative burner device includes a pair of burners, Each burner includes a fuel pipe that supplies fuel, and an air supply and exhaust pipe that is disposed in the vicinity of the fuel pipe, supplies combustion air, and exhausts combustion gas. One end of the air supply and exhaust pipe communicates with the inside of the furnace, and the other end communicates with an air supply and exhaust chamber where the heat storage body is disposed. The regenerative burner device further includes a communication pipe that communicates the space portions of the air supply and exhaust chambers formed inside the furnace of the pair of burners on the side closer to the furnace than the heat storage body. An introduction pipe for introducing cooling air is provided in the communication pipe.

[0007] According to the above configuration, by using the introduction pipe to introduce cooling air into the communication pipe, the temperature of the combustion air flowing through the communication pipe can be lowered, overheating of the communication pipe can be suppressed, and damage can be prevented.

Effects of the Invention

[0008] According to the present invention, it is possible to provide a regenerative burner device capable of suppressing overheating of a communication pipe that communicates the inside of a furnace of an air supply and exhaust chamber where a heat storage body is disposed with each other by a pipe, and preventing damage.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Mode for Carrying Out the Invention

[0010] (First Embodiment) FIG. 1 is a schematic cross-sectional view of a regenerative burner device 10 according to a first embodiment of the present invention. As shown in FIG. 1, the regenerative burner device 10 includes a pair of burners 1 and 2 arranged side by side on one wall surface in the furnace S. Note that the pair of burners 1 and 2 may be arranged one by one on the opposing wall surfaces so as to face each other in the furnace S.

[0011] The burner 1 includes a fuel pipe 11 that supplies fuel to the furnace S, and an air supply and exhaust pipe 12 that is arranged in the vicinity of the fuel pipe 11, supplies combustion air, and exhausts combustion gas. One end of the fuel pipe 11 communicates with the furnace S. The fuel pipe 11 is provided with an adjustment valve 11a that opens and closes the fuel pipe 11 and adjusts the fuel supply amount. One end of the air supply and exhaust pipe 12 communicates with the furnace S, and the other end communicates with an air supply and exhaust chamber 14 in which a regenerator 13 is arranged. Note that the combustion air may be not only air but also, for example, a gas containing oxygen.

[0012] The air supply and exhaust chamber 14 is connected to an air supply device 16 and an exhaust device 17 through a pipe 15. By switching the opening and closing of an air supply valve 15a and an exhaust valve 15b provided in the pipe 15, combustion air is supplied from the air supply device 16 to the air supply and exhaust chamber 14 through the air supply valve 15a, and combustion gas is exhausted from the air supply and exhaust chamber 14 to the exhaust device 17 through the exhaust valve 15b.

[0013] The burner 2 includes a fuel pipe 21 that supplies fuel to the furnace interior S, and an air supply and exhaust pipe 22 that is disposed near the fuel pipe 21, supplies combustion air, and exhausts combustion gas. One end of the fuel pipe 21 communicates with the furnace interior S. The fuel pipe 21 is provided with an adjustment valve 21a that opens and closes the fuel pipe 21 and adjusts the fuel supply amount. One end of the air supply and exhaust pipe 22 communicates with the furnace interior S, and the other end communicates with an air supply and exhaust chamber 24 in which a heat storage body 23 is disposed.

[0014] The air supply and exhaust chamber 24 is connected to the air supply device 16 and the exhaust device 17 through a pipe 25. By switching the opening and closing of an air supply valve 25a and an exhaust valve 25b provided in the pipe 25, combustion air is supplied from the air supply device 16 to the air supply and exhaust chamber 24 through the air supply valve 25a, and combustion gas is exhausted from the air supply and exhaust chamber 24 to the exhaust device 17 through the exhaust valve 25b by the exhaust device 17. In the burners 1 and 2, the air supply device 16 and the exhaust device 17 are shared.

[0015] The regenerative burner device 10 further includes a communication pipe 18 that communicates the space portions 14a and 24a of the air supply and exhaust chambers 14 and 24 formed closer to the furnace interior S side than the heat storage bodies 13 and 23 of the pair of burners 1 and 2. The communication pipe 18 is provided with an introduction pipe 19 that introduces cooling air and a thermometer 18a that measures the temperature of the high-temperature preheated air flowing in the communication pipe 18. The introduction pipe 19 is provided with an adjustment valve 19a that opens and closes the introduction pipe 19 and adjusts the introduction amount of the cooling air based on the measurement result of the thermometer 18a. Note that the cooling air, which is the cooling air, may be not only air but also, for example, a gas or a fluid used as a cooling medium.

[0016] The regenerative burner device 10 operates as follows.

[0017] As shown in Fig. 1, when the burner 1 is on the combustion side for burning and the burner 2 is on the suction side for sucking the combustion gas in the furnace S, in the burner 1, the opening degree of the regulating valve 11a is adjusted to supply fuel from the fuel pipe 11 to the furnace S. Also, the air supply valve 15a is opened and the exhaust valve 15b is closed, and combustion air is supplied from the air supply device 16 to the air supply and exhaust chamber 14 through the air supply valve 15a. The combustion air supplied to the air supply and exhaust chamber 14 is heated by the heat storage body 13, supplied from the air supply and exhaust pipe 12 to the furnace S, mixed with the fuel supplied from the fuel pipe 11, and burns in the furnace S. In the figure, the state where the valve is open is shown in white, and the state where the valve is closed is shown in black.

[0018] A part of the combustion air heated by the heat storage body 13 in the air supply and exhaust chamber 14 passes through the communication pipe 18 and is supplied to the air supply and exhaust chamber 24 of the burner 2. The temperature of the combustion air flowing through the communication pipe 18 is measured by the thermometer 18a. When the temperature exceeds a predetermined temperature, the regulating valve 19a is opened and cooling air is introduced into the communication pipe 18. By introducing the cooling air into the communication pipe 18, the temperature of the combustion air in the communication pipe 18 decreases, and overheating of the communication pipe 18 by the combustion air is suppressed.

[0019] In the burner 2 which is on the suction side for sucking the combustion gas in the furnace S, the regulating valve 21a is closed and no combustion is supplied from the fuel pipe 21. Also, the air supply valve 25a is closed and the exhaust valve 25b is opened. The combustion gas in the furnace S is sucked from the exhaust device 17 to the air supply and exhaust chamber 24 through the air supply and exhaust pipe 22. In the air supply and exhaust chamber 24, the unburned fuel burns by the combustion air from the communication pipe 18. The heat storage body 23 in the air supply and exhaust chamber 24 stores heat by the combustion gas due to the combustion of the combustion gas and unburned fuel from the furnace S. The combustion gas in the air supply and exhaust chamber 24 is exhausted by the exhaust device 17 through the exhaust valve 25b.

[0020] After a certain period of time, the burner 2 is set as the combustion side for combustion, and the burner 1 is switched to the suction side for sucking the combustion gas in the furnace S. At this time, the opening and closing of the regulating valves 11a and 21a of the fuel pipes 11 and 21 are reversed, and the opening and closing of the air supply valves 15a and 25a and the exhaust valves 15b and 25b are reversed. Then, the combustion air is heated by the heat storage body 23 in the air supply and exhaust chamber 24, and in the air supply and exhaust chamber 14, the unburned fuel burns by the combustion air from the communication pipe 18. The heat storage body 13 in the air supply and exhaust chamber 14 stores heat by the combustion gas from the furnace S and the combustion gas generated by the combustion of the unburned fuel.

[0021] According to the regenerative burner device 10 having the above configuration, the following effects can be exhibited.

[0022] (1) A communication pipe 18 is provided to communicate the space portions 14a and 24a of the air supply and exhaust chambers 14 and 24 formed inside the furnace with respect to the heat storage bodies 13 and 23 of the pair of burners 1 and 2. An introduction pipe 19 for introducing cooling air is provided in the communication pipe 18. Therefore, by using the introduction pipe 19 to introduce cooling air into the communication pipe 18, the temperature of the combustion air flowing in the communication pipe 18 can be lowered, overheating of the communication pipe 18 can be suppressed, and damage can be prevented.

[0023] (2) Since the pair of burners 1 and 2 are arranged side by side in the furnace S, the length of the communication pipe 18 can be shortened compared to the case where they are arranged oppositely in the furnace S. Also, by shortening the communication pipe 18, the combustion air can be quickly supplied to the air supply and exhaust chamber on the suction side.

[0024] (Second Embodiment) Figure 2 is a schematic cross-sectional view of the regenerative burner device 10 according to the second embodiment of the present invention. In the second embodiment, a pair of burners are arranged one by one on the opposing wall surfaces so as to face each other in the furnace S, and a cooling pipe for cooling the combustion air flowing in the communication pipe is provided. The communication pipe and the cooling pipe are different from the first embodiment in that they have a double pipe structure, and other configurations are the same as those of the first embodiment. Therefore, in the description of the second embodiment, the same reference numerals are given to the same parts as those of the first embodiment, and detailed descriptions thereof are omitted.

[0025] The regenerative burner device 10 includes a pair of burners 1a and 2a that are opposed to each other in the furnace S. The configuration of the burner 1a is the same as that of the burner 1, and the configuration of the burner 2a is the same as that of the burner 2.

[0026] The regenerative burner device 10 further includes a cooling pipe 31 for cooling the combustion air flowing in the communication pipe 18. The communication pipe 18 and the cooling pipe 31 have a double pipe structure in which the cooling pipe 31 is the inner pipe and the communication pipe 18 is the outer pipe. The cooling pipe 31 extends so as to penetrate the communication pipe 18 in the axial direction, and cooling air is introduced from one end and discharged from the other end. The cooling air flowing in the cooling pipe 31 exchanges heat with the combustion air flowing in the communication pipe 18 located outside the cooling pipe 31 to cool the combustion air. An adjustment valve 31a for opening and closing the cooling pipe 31 and adjusting the introduction amount of the cooling air based on the measurement result of the thermometer 18a is provided at one end of the cooling pipe 31 on the cooling air introduction side. For example, when the temperature of the thermometer 18a becomes equal to or higher than a predetermined temperature, the adjustment valve 31a is opened to allow the cooling air to flow into the cooling pipe 31.

[0027] According to the regenerative burner device 10 having the above configuration, the following effects can be exhibited.

[0028] (1) Since the communication pipe 18 and the cooling pipe 31 have a double-pipe structure in which the cooling pipe 31 is the inner pipe and the communication pipe 18 is the outer pipe, the temperature of the combustion air flowing through the communication pipe 18 can be lowered by the cooling air flowing through the cooling pipe 31, overheating of the communication pipe 18 can be suppressed, and damage can be prevented.

[0029] (2) The communication pipe 18 is provided with a thermometer 18a for measuring the temperature of the combustion air flowing through the communication pipe 18. When the temperature of the thermometer 18a becomes equal to or higher than a predetermined temperature, cooling air is caused to flow through the cooling pipe 31. Therefore, it is possible to prevent the combustion air flowing through the communication pipe 18 from being excessively cooled.

[0030] (3) Since the burners 1a and 2a are positioned opposite to each other in the furnace S, it is easy to suck the combustion gas generated by the burner 1a with the supply and exhaust pipe 22 of the burner 2a, and it is easy to suck the combustion gas generated by the burner 2a with the supply and exhaust pipe 12 of the burner 1a.

[0031] (4) Cooling air is introduced from one end of the cooling pipe 31 and discharged from the other end. Since an adjustment valve 31a is provided at one end on the cooling air introduction side of the cooling pipe 31, there is no risk of the adjustment valve 31a becoming hot, and it is not necessary to make the adjustment valve 31a a valve with a heat-resistant specification.

[0032] (Third Embodiment) FIG. 3 is a schematic cross-sectional view of the regenerative burner device 10 according to the third embodiment of the present invention. The third embodiment is different from the second embodiment in that the combustion air flowing through the communication pipe and the cooling air flowing through the cooling pipe are always in a countercurrent flow, and the other configurations are the same as those of the second embodiment. Therefore, in the description of the third embodiment, the same reference numerals are given to the same parts as those of the first and second embodiments, and detailed descriptions thereof are omitted.

[0033] The regeneration burner device 10 further includes a cooling pipe 41 that cools the combustion air flowing in the communication pipe 18. The communication pipe 18 and the cooling pipe 41 have a double-pipe structure in which the cooling pipe 41 is the inner pipe and the communication pipe 18 is the outer pipe. The cooling pipe 41 extends so as to penetrate the communication pipe 18 in the axial direction, and is connected to the air supply device 51 through pipes 42 and 44, and is connected to the exhaust device 52 through pipes 43 and 45. By switching the air supply valve 42a provided in the pipe 42, the air supply valve 44b provided in the pipe 44, the exhaust valve 43a provided in the pipe 43, and the exhaust valve 45b provided in the pipe 45, the combustion air flowing in the communication pipe 18 and the cooling air flowing in the cooling pipe 41 become counterflows. Specifically, when the burner 1a is on the combustion side and the burner 2a is on the suction side, the combustion air flows from left to right in the communication pipe 18 in FIG. 3. At this time, by closing the air supply valve 42a, opening the exhaust valve 43a, opening the air supply valve 44b, and closing the exhaust valve 45b, the cooling air flows from right to left in the cooling pipe 41. That is, the combustion air flowing in the communication pipe 18 and the cooling air flowing in the cooling pipe 41 become counterflows. And when the burner 1a is on the suction side and the burner 2a is on the combustion side, the combustion air flows from right to left in the communication pipe 18 in FIG. 3. At this time, by opening the air supply valve 42a, closing the exhaust valve 43a, closing the air supply valve 44b, and opening the exhaust valve 45b, the cooling air flows from left to right in the cooling pipe 41. That is, the combustion air flowing in the communication pipe 18 and the cooling air flowing in the cooling pipe 41 become counterflows.

[0034] FIG. 4 is an enlarged view of the connecting portion between the cooling pipe 41 and the pipes 44 and 45 in FIG. 3. As shown in FIG. 4, when the burner 1a is on the combustion side and the burner 2a is on the suction side, the pipe 44, which is the cooling air introduction portion of the cooling pipe 41, is a bent pipe, and the flow of the cooling air introduced into the pipe 44 is configured to follow the flow of the cooling air in the cooling pipe 41, and the cooling air from the pipe 44 is less likely to flow toward the pipe 45 side.

[0035] FIG. 5 is an enlarged view of the connection portion between the cooling pipe 41 and the pipes 42 and 43 in FIG. 3. As shown in FIG. 5, when the burner 1a is on the combustion side and the burner 2a is on the suction side, the pipe 43, which is the cooling air discharge portion of the cooling pipe 41, is configured such that the flow of the introduced cooling air in the pipe 43 coincides with the flow of the cooling air in the cooling pipe 41, and the cooling air in the cooling pipe 41 is less likely to flow toward the pipe 42 side.

[0036] On the other hand, when the burner 1a is on the suction side and the burner 2a is on the combustion side, the opening and closing of the air supply valves 44b, exhaust valves 45b, air supply valve 42a, and exhaust valve 43a in FIGS. 4 and 5 are reversed. At this time, the pipe 42, which is the cooling air introduction portion of the cooling pipe 41, is a curved pipe, and the flow of the introduced cooling air in the pipe 42 is configured to follow the flow of the cooling air in the cooling pipe 41, and the cooling air from the pipe 42 is less likely to flow toward the pipe 43 side. Further, the pipe 45, which is the cooling air discharge portion of the cooling pipe 41, is configured such that the flow of the introduced cooling air in the pipe 45 coincides with the flow of the cooling air in the cooling pipe 41, and the cooling air in the cooling pipe 41 is less likely to flow toward the pipe 44 side.

[0037] According to the regenerative burner device 10 having the above configuration, the following effects can be exhibited.

[0038] (1) In a double-tube heat exchanger, it is generally known that the heat exchange efficiency is better when the fluids exchanging heat flow in opposite directions than when they flow in the same direction. Since the combustion air flowing in the communication pipe 18 and the cooling air flowing in the cooling pipe 41 are always configured to flow in opposite directions to each other, the heat exchange efficiency between the combustion air flowing through the communication pipe 18 and the cooling air flowing through the cooling pipe 41 can be improved.

[0039] (2) The pipes 42 and 44 that serve as the cooling air introduction parts of the cooling pipe 41 are configured such that the flow of the cooling air introduced at the cooling air introduction part follows the flow of the cooling air in the cooling pipe 41. Therefore, the cooling air can be introduced without being retained in the cooling pipe. Also, the pipes 43 and 45 that serve as the cooling air discharge parts of the cooling pipe 41 are configured such that the flow of the cooling air discharged at the cooling air discharge part matches the flow of the cooling air in the cooling pipe 41. Therefore, the discharge from the cooling pipe 41 can be carried out smoothly.

[0040] (3) The pipes 43 and 45 that serve as the cooling air discharge parts of the cooling pipe 41 are configured such that the flow of the cooling air discharged at the cooling air discharge part matches the flow of the cooling air in the cooling pipe 41. Therefore, the cooling air in the cooling pipe 41 is less likely to flow toward the pipes 42 and 44 after exchanging heat with the combustion air flowing through the communication pipe 18. Accordingly, there is no risk that the air supply valves 42a and 44b connected to the pipes 42 and 44 will become hot, and it is not necessary to make the air supply valves 42a and 44b valves with heat-resistant specifications.

[0041] (Fourth Embodiment) FIG. 6 is a schematic cross-sectional view of a regenerative burner device 10 according to a fourth embodiment of the present invention. The fourth embodiment is different from the third embodiment in that the fuel (fuel gas) of the burners 1a and 1b is also used as a cooling medium flowing through the cooling pipe, and other configurations are the same as those of the third embodiment. For this reason, in the description of the fourth embodiment, the same reference numerals are given to the same parts as those in the first to third embodiments, and detailed descriptions of those contents are omitted.

[0042] In the present embodiment, the fuel gas that is the fuel of the burners 1a and 1b is ammonia gas. And as shown in FIG. 6, the regenerative burner device 10 is configured to also use this ammonia gas as a cooling medium flowing through the cooling pipe 41. Specifically, the ammonia gas is introduced into the cooling pipe 41, and the ammonia gas heated by heat exchange with the high-temperature combustion air flowing through the communication pipe 18 is supplied to the fuel pipes 11 and 21 and used for the combustion of the burners 1a and 1b.

[0043] According to the regenerative burner device 10 of the above configuration, by using fuel gas as ammonia gas, the decarbonization of the regenerative burner device 10 can be achieved. Further, by using the cooling air flowing in the cooling pipe 41 as ammonia gas, the ammonia gas can be heated by the combustion air, and the ammonia gas that is difficult to burn can be made easier to burn.

[0044] Summarizing the present invention and the embodiments, it is as follows.

[0045] (1) One embodiment of the present invention is a regenerative burner device provided with a heat storage body that recovers the heat of combustion gas burned in a furnace and heats combustion air, The regenerative burner device includes a pair of burners, Each burner includes a fuel pipe for supplying fuel, and an air supply and exhaust pipe that is disposed in the vicinity of the fuel pipe, supplies combustion air, and exhausts combustion gas. One end of the air supply and exhaust pipe communicates with the furnace interior, and the other end communicates with an air supply and exhaust chamber in which the heat storage body is disposed. The regenerative burner device further includes a communication pipe that communicates the space portions of the air supply and exhaust chambers formed inside the furnace with respect to the heat storage body of the pair of burners. An introduction pipe for introducing cooling air is provided in the communication pipe.

[0046] According to the configuration (1), by using the introduction pipe to introduce cooling air into the communication pipe, the temperature of the combustion air flowing in the communication pipe can be lowered, overheating of the communication pipe can be suppressed, and damage can be prevented.

[0047] (2) One embodiment of the present invention is a regenerative burner device provided with a heat storage body that recovers the heat of combustion gas burned in a furnace and heats combustion air, The regenerative burner device includes a pair of burners, Each burner includes a fuel pipe for supplying fuel, and an air supply and exhaust pipe disposed near the fuel pipe for supplying combustion air and exhausting combustion gas. One end of the air supply and exhaust pipe communicates with the inside of the furnace, and the other end communicates with the air supply and exhaust chamber where the heat storage body is disposed. The regenerative burner device further includes a communication pipe that communicates the space portions of the air supply and exhaust chamber formed inside the furnace with respect to the heat storage bodies of the pair of burners, and a cooling pipe for cooling the combustion air flowing through the communication pipe. The communication pipe and the cooling pipe have a double pipe structure.

[0048] According to the configuration (2), the temperature of the combustion air flowing through the communication pipe can be reduced by the cooling air flowing through the cooling pipe, overheating of the communication pipe can be suppressed, and damage can be prevented.

[0049] (3) In the configuration (2), the combustion air flowing through the communication pipe and the cooling air flowing through the cooling pipe are configured to flow in opposite directions to each other.

[0050] According to the configuration (3), by opposing the flow of the combustion air flowing through the communication pipe and the flow of the cooling air flowing through the cooling pipe, the efficiency of heat exchange between the combustion air and the cooling air can be improved.

[0051] (4) In the configuration (2) or (3), ammonia gas used as the fuel is used as the cooling medium flowing through the cooling pipe.

[0052] According to the configuration (4), by using ammonia gas as the fuel, decarbonization of the regenerative burner device can be achieved. Further, by using ammonia gas as the cooling medium flowing through the cooling pipe, ammonia gas can be heated by the combustion air, and ammonia gas that is difficult to burn can be made easier to burn.

[0053] (5) In any one of the above configurations (2) to (4), a thermometer for measuring the temperature of the combustion air flowing in the communication pipe is provided in the communication pipe, and when the temperature of the thermometer becomes equal to or higher than a predetermined temperature, cooling air is caused to flow into the cooling pipe.

[0054] According to the above configuration (5), when the temperature of the combustion air flowing in the communication pipe becomes equal to or higher than a predetermined temperature, by causing cooling air to flow into the cooling pipe, it is possible to prevent excessive cooling of the combustion air.

[0055] (6) In any one of the above configurations (2) to (5), the cooling air introduction part of the cooling pipe is configured such that the flow of the introduced cooling air in the cooling air introduction part follows the flow of the cooling air in the cooling pipe. The cooling air discharge part of the cooling pipe is configured such that the flow of the discharged cooling air in the cooling air discharge part matches the flow of the cooling air in the cooling pipe.

[0056] According to the above configuration (6), since the flow of the introduced cooling air in the cooling air introduction part is configured to follow the flow of the cooling air in the cooling pipe, the cooling air is introduced into the cooling pipe without staying, and also, since the flow of the discharged cooling air in the cooling air discharge part is configured to match the flow of the cooling air in the cooling pipe, the discharge from the cooling pipe is smoothly performed.

[0057] It is also possible to make various modifications and changes without departing from the spirit and scope of the present invention described in the claims.

Industrial Applicability

[0058] In the present invention, it is possible to provide a regenerative burner device capable of suppressing overheating of a communication pipe that communicates between the inner sides of a furnace of an air supply and exhaust chamber where a heat storage body is disposed, so the industrial utility value is great.

Explanation of Reference Numerals

[0059] 1 Burner 10 Regenerative burner device 11 Fuel pipe 11a Control valve 12 Supply and exhaust pipe 13 Heat storage body 14 Supply and exhaust chamber 14a Space part 15 Pipe 15a Supply air valve 15b Exhaust valve 16 Supply air device 17 Exhaust device 18 Communication pipe 18a Thermometer 19 Introduction pipe 19a Control valve 1a Burner 2 Burners 21 Fuel pipe 21a Control valve 22 Supply and exhaust pipe 23 Heat storage body 24 Supply and exhaust chamber 24a Space part 25 Pipe 25a Supply air valve 25b Exhaust valve 2a Burner 31 Cooling pipe 31a Control valve 41 Cooling pipe 42 Pipe 42a Supply air valve 43 Pipe 43a Exhaust valve 44 Pipe 44b Supply air valve 45 Pipe 45b Exhaust valve 51 Supply air device 52 Exhaust device S Inside the furnace

Claims

1. A regenerative burner device provided with a heat storage body that recovers the heat of combustion gas burned in a furnace and heats combustion air, wherein the regenerative burner device includes a pair of burners, each burner including a fuel pipe for supplying fuel, and an air supply and exhaust pipe disposed in the vicinity of the fuel pipe for supplying combustion air and exhausting combustion gas, one end of the air supply and exhaust pipe communicates with the inside of the furnace, and the other end communicates with an air supply and exhaust chamber in which the heat storage body is disposed, the regenerative burner device further includes a communication pipe that communicates the space portions of the air supply and exhaust chambers formed inside the furnace with respect to the heat storage bodies of the pair of burners, and an introduction pipe for introducing cooling air is provided in the communication pipe. A regenerative burner device.

2. A regenerative burner device provided with a heat storage body that recovers the heat of combustion gas burned in a furnace and heats combustion air, wherein the regenerative burner device includes a pair of burners, each burner including a fuel pipe for supplying fuel, and an air supply and exhaust pipe disposed in the vicinity of the fuel pipe for supplying combustion air and exhausting combustion gas, one end of the air supply and exhaust pipe communicates with the inside of the furnace, and the other end communicates with an air supply and exhaust chamber in which the heat storage body is disposed, the regenerative burner device further includes a communication pipe that communicates the space portions of the air supply and exhaust chambers formed inside the furnace with respect to the heat storage bodies of the pair of burners, and a cooling pipe for cooling the combustion air flowing in the communication pipe, wherein the communication pipe and the cooling pipe have a double pipe structure. A regenerative burner device.

3. The regenerative burner device according to claim 2, wherein the combustion air flowing in the communication pipe and the cooling air flowing in the cooling pipe are configured to flow in opposite directions to each other.

4. The regenerative burner device according to claim 2, wherein ammonia gas used as the fuel is used as the cooling medium flowing in the cooling pipe.

5. A thermometer for measuring the temperature of the combustion air flowing in the communication pipe is provided in the communication pipe, and when the temperature of the thermometer becomes a predetermined temperature or higher, cooling air flows into the cooling pipe. The regenerative burner device according to claim 2.

6. The cooling air introduction portion of the cooling pipe is configured such that the flow of introduction of the cooling air in the cooling air introduction portion follows the flow of the cooling air in the cooling pipe, The cooling air discharge part of the cooling pipe is configured such that the flow of the cooling air discharged in the cooling air discharge part matches the flow of the cooling air in the cooling pipe. The regenerator burner device according to any one of claims 2 to 5.

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