JPH11292502A - Reformer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reformer which has a long service life and is capable of reducing stress caused in the reforming reaction tubes and manifolds and also expanding the ranges of operating conditions by absorbing the difference in thermal expansion due to the temp. difference caused among reforming reaction tubes. SOLUTION: In this reformer, a feed gas manifold shell plate 22 is divided into two divided shell plates in the axial direction of each of reforming reactor tubes 3 and the two divided shell plates are airtightly joined together through a bellows 27 by welding, to absorb the difference in thermal expansion between an inner tube 3a and an outer tube 3c of each of the reforming reaction tubes 3 by expansion/contraction of the bellows 27 and to inhibit stress from being caused in the respective constituent parts or welded joints of the reforming reaction tubes 3, a feed gas manifold 18 and a reformed gas manifold 19. Also, since the bellows 27 is formed in the outer surface of the reformer, the welding workability is improved and excellent quality with respect to the welding can be obtained and further, breakage after manufacture of the reformer, or the like, can visually be ascertained to improve the reliability.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reforming apparatus, and more particularly to a reforming apparatus for reducing a stress generated in a reforming reaction tube or a manifold.
The present invention relates to a reformer that has a long life and can expand the range of operating conditions.

[0002]

2. Description of the Related Art FIG. 6 is a longitudinal sectional view showing a conventional reformer disclosed in, for example, JP-A-8-26701. In FIG. 6, 1 is a reforming furnace, 2 is a heat insulating material for preventing heat radiation, 3
Is an annular reforming reaction tube, and includes an inner tube 3a, an intermediate tube 3b, and an outer tube 3.
c, an annular end cap 3d disposed at the end of the inner tube 3a and the outer tube 3c. Reference numeral 4 denotes a first annular portion formed between the inner tube 3a and the intermediate tube 3b and into which the raw material gas is introduced, reference numeral 5 denotes a catalyst layer formed by filling the first annular portion with a catalyst, and reference numeral 6 denotes an intermediate portion. A second annular portion 7 formed between the tube 3b and the outer tube 3c and through which the reformed gas generated by the reforming reaction caused by the raw material gas flowing through the catalyst layer 5 flows, and a combustion device 7 And the fuel pipe 7a and the air ejection hole 7b
It is composed of 7c indicates a flame of the combustion device, and 8 indicates a combustion space. Reference numeral 9 denotes a filler, reference numeral 10 denotes a wire mesh for holding the filler 9, and reference numeral 11 denotes a combustion gas manifold which is burned by the combustion device 7 and discharged through the inner pipe 3a. 1
Reference numeral 2 denotes a heat insulating material, and the heat insulating material 12 prevents the combustion gas from heating the outer tube. 13 is a fuel inlet, and 14 is an air inlet. Reference numeral 15 denotes a source gas inlet, 16 denotes a reformed gas outlet, and 17 denotes a combustion gas outlet. Reference numeral 18 denotes a raw material gas manifold for distributing the raw material of the reformer to the reforming reaction tube 3, and 19 denotes a reformed gas manifold for discharging the reformed gas produced in the reforming reaction tube. Reference numeral 20 denotes a combustion tube through which the combustion gas generated by the combustion device 7 flows. Reference numeral 21 denotes an inner tube support plate that supports the inner tube 3a, 22 denotes a source gas manifold body plate, and 21 and 22 constitute the source gas manifold 18. 23 is an outer tube support plate that supports the outer tube 3c, 24 is a reformed gas manifold body plate, 25 is an intermediate tube support plate that supports the intermediate tube 3b,
The reformed gas manifold 19 is constituted by 23 to 25. The inner pipe 3a and the inner pipe support plate 21 are connected by welding via an inner pipe bellows 26.

Next, the operation of the conventional reformer will be described. A mixed gas of fuel and steam, which is the raw material gas of the reformer, is introduced into the reforming furnace 1 through the raw material gas inlet 15 and distributed by the raw material gas manifold 18 to form the reforming reaction tube 3.
Sent to The raw material gas undergoes a reforming reaction when passing through the catalyst layer 5 in which the first annular portion 4 of the inner pipe 3a and the intermediate pipe 3b is filled with the catalyst, and becomes a hydrogen-rich reformed gas.
The reformed gas reverses the flow direction in the end cap 3d,
The gas passes through the second annular portion 6 between the intermediate pipe 3b and the outer pipe 3c and is collected by the reformed gas manifold 19 and taken out of the reforming furnace 1. Since the previous reforming reaction is a violent endothermic reaction, it is necessary to supply heat to the reforming reaction tube 3 in order to continue the reaction. Heat is supplied from the combustion gas. The fuel supplied from the fuel inlet 14 exits the combustion space through the fuel pipe 7a. There, it is mixed with the combustion air ejected from the air ejection hole 7 b from the air inlet 14 and burns in the combustion space 8. In order to prevent the flame from touching the reforming reaction tube, it is necessary to attach the combustion device 7 to the reforming furnace 1 so as to be shifted downward with respect to the reforming reaction tube, and enlarge the combustion space 8. Combustion device 7
The high-temperature combustion gas combusted in the above passes through the central portion of the annular reforming reaction tube 3 and gathers in the upper combustion gas manifold 11 to be taken out of the reforming furnace 1. At this time, the high-temperature combustion gas heats the inner pipe 3a and the filler 9. The filler 9 plays a role in promoting heat transfer from the combustion gas to the inner tube. Insulation material 1
2 prevents the combustion gas from heating the outer tube.

As described above, since the reforming reaction tube 3 is heated from the inner peripheral side, that is, from the inner tube 3a side, the inner tube 3a is
The temperature becomes higher than c. Due to this temperature difference, the inner pipe 3a undergoes thermal expansion in the axial direction that is several mm larger than the outer pipe 3c, but this thermal expansion difference is absorbed by the inner pipe bellows 26. When the inner pipe bellows 26 is not provided, the stress caused by this temperature difference is applied to a weld between the inner pipe 3a and the inner pipe support plate 21 or a weld between the outer pipe 3c and the outer pipe support plate 23,
The weld may break. In addition, since the axial length of the inner pipe 3a and the outer pipe 3c is significantly longer than the length (plate thickness) in the radial direction, the factors that cause stress in each component and the welded joint are as described above. The thermal expansion in the axial direction caused by the temperature difference may be considered.

[0005]

As described above, in the conventional reformer, the inner tube 3a and the inner tube support plate 21 are connected by welding via the inner tube bellows 26, and the inner tube 3a and the outer tube 3c are connected to each other. The inner pipe bellows 26 absorbs the difference in thermal elongation caused by the temperature difference generated between the bellows. However, since the inner pipe bellows 26 is installed on the inner surface of the reformer, the workability of welding the bellows portion is poor, which causes a problem in quality. Further, after completion, the bellows portion cannot be confirmed, and the reliability is low. There is also a problem that the range of operating conditions is narrowly limited so as to shorten the life of the reformer or to reduce the temperature difference. Further, there is a problem that the number of the inner bellows 26 for the number of the reforming reaction tubes 3 is required, which is not economical.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and absorbs a thermal expansion difference caused by a temperature difference in a reforming reaction tube, thereby reducing a stress generated in the reforming reaction tube and the manifold. It is an object of the present invention to obtain a reformer that can reduce the power consumption and extend the range of operating conditions with a long life.

[0007]

In the reforming apparatus according to the present invention, the shell plate of the raw material gas manifold is divided into a plurality of members in the axial direction of the reforming reaction tube, and the divided shell plates are air-tight via bellows. It is constructed by welding connection.

Further, in the reforming apparatus according to the present invention, the shell plate of the reformed gas manifold is divided into a plurality in the axial direction of the reforming reaction tube, and the divided shell plates are hermetically welded and connected via bellows. It is configured.

In the reforming apparatus according to the present invention, the diaphragm is provided in a ring shape so as to surround the reforming reaction tube on a part of the outer tube support plate.

In the reforming apparatus according to the present invention, the diaphragm is provided in a ring shape so as to surround the reforming reaction tube on a part of the inner tube support plate.

Further, in the reformer according to the present invention, the combustion gas manifold is communicated with the inner pipe through the communication pipe, and is disposed away from the inner pipe support plate in the axial direction of the reforming reaction pipe. The diaphragm is provided in a ring shape on a part of the inner tube support plate so as to surround the reforming reaction tube.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1 FIG. FIG. 1 is a longitudinal sectional view showing a reforming apparatus according to Embodiment 1 of the present invention.
The same or corresponding parts as those of the conventional reformer shown in FIG. 6 are denoted by the same reference numerals, and description thereof is omitted here. In the first embodiment, the raw material gas manifold body plate 22 is divided into two in the axial direction of the reforming reaction tube 3, and the two divided material gas manifold body plates 22 are hermetically sealed via the annular bellows 27. Welding connection.

Next, the operation of the reformer according to the first embodiment will be described. A mixed gas of fuel and steam, which is the raw material gas of the reformer, is introduced into the reforming furnace 1 through the raw material gas inlet 15, distributed by the raw material gas manifold 18, and sent to the reforming reaction tube 3. The raw material gas is a catalyst layer 5 in which the inner tube 3a and the first annular portion 4 of the intermediate tube 3b are filled with a catalyst.
When passing through the inside, a reforming reaction occurs, and a hydrogen-rich reformed gas is formed. The reformed gas reverses the flow direction in the end cap 3d, and the second annular portion 6 between the intermediate pipe 3b and the outer pipe 3c.
Passes through the reforming gas manifold 19 and is taken out of the reforming furnace 1. Since the previous reforming reaction is a violent endothermic reaction, it is necessary to supply heat to the reforming reaction tube 3 in order to continue the reaction. Therefore, a combustion device 7 is provided in the reforming furnace 1, Heat is supplied from the combustion gas. The fuel supplied from the fuel inlet 13 exits the combustion space through the fuel pipe 7a. There, it is mixed with the combustion air supplied from the air inlet 14 and jetted from the air jet holes 7b, and burns in the combustion space 8. The high-temperature combustion gas burned by the combustion device 7 passes through the inside of the combustion tube 20 and flows inside the inner tube of each reforming reaction tube while changing the flow direction by 180 degrees in the lower furnace space. The combustion gas then collects in the combustion gas manifold 11 and is taken out of the reforming furnace 1 through the combustion gas outlet 17. At this time, the high-temperature combustion gas heats the inner pipe 3a and the filler 9. The heat insulating material 12 prevents the combustion gas from heating the outer tube. At this time, the axial average temperature of the inner pipe 3a is 50 to 200 ° C. higher than the axial average temperature of the outer pipe 3c.
And a difference in thermal expansion between the inner pipe 3a and the outer pipe 3c in the axial direction of about 5 mm at the maximum occurs.

Since the outer tube 3c is fixed to the reforming furnace 1 via the outer tube support plate 23, the outer tube 3c is attached to the inner tube 3a in the axial direction of the reforming reaction tube 3 due to the difference in thermal expansion. The stretching force acts. The expansion and contraction force acting on the inner pipe 3a is transmitted to the raw material gas manifold body plate 22 via the inner pipe support plate 21, and the raw material gas manifold body plate 22 is transferred to the reforming reaction tube 3
The bellows 27 expands and contracts in the axial direction of the reforming reaction tube 3.

As described above, according to the first embodiment, since the raw material gas manifold body plate 22 divided into two parts in the axial direction of the reforming reaction tube 3 is welded and connected via the annular bellows 27, The thermal expansion difference generated between the pipe 3a and the outer pipe 3c is absorbed by the expansion and contraction of the bellows 27, and the components of the reforming reaction tube 3, the raw material gas manifold 18, the reformed gas manifold 19, and the welded joint are formed. The generation of stress is suppressed. In addition, since the bellows 27 is installed on the outer surface of the reformer, welding workability is improved, excellent welding quality can be obtained, and breakage after production can be visually checked, thereby improving reliability. Can be improved. As a result, a reformer that has a long life and can expand the range of operating conditions is obtained. In addition, only one bellows, which is conventionally required for the number of reaction tubes, is required, so that the number of parts and the number of welding steps can be reduced, and cost reduction can be realized.

If the thickness of the bellows 27 is about 0.3 mm, the stress generated due to the difference in thermal expansion of 5 mm is 60 mm.
It can be suppressed to about kgf / mm ^2. On the other hand, bellows 2
7, the temperature of the raw material gas is 55
0 ° C. or less. The low cycle fatigue strength at 600 ° C. of general stainless steels such as SUS304 and SUS316 is about 150 kg / mm ² , and there is no problem in heat resistance. Such a general stainless steel can be used as a bellows material. it can.

Embodiment 2 FIG. In the second embodiment, the bellows 28 is installed on the reformed gas manifold body plate 24 instead of installing the bellows 27 on the raw material gas manifold body plate 22, and other configurations are the same as those of the first embodiment. It is configured similarly. That is, in the second embodiment, as shown in FIG. 2, the reforming manifold body plate 24 is divided into two in the axial direction of the reforming reaction tube 3.
The divided modified manifold body plate 24 is hermetically welded and connected via an annular bellows 28.

Next, the operation of the reformer according to the second embodiment will be described. Also in the reforming apparatus according to the second embodiment, a thermal expansion difference occurs between the inner pipe 3a and the outer pipe 3c as in the first embodiment. Since the outer tube 3c is fixed to the reforming furnace 1 via the outer tube support plate 23, an axial expansion and contraction force of the reforming reaction tube 3 acts on the inner tube 3a due to the difference in thermal expansion. The expansion and contraction force acting on the inner tube 3a is
Through the raw material gas manifold body plate 22, and further to the reformed gas manifold body plate 24, and acts to expand and contract the reformed gas manifold body plate 24 in the axial direction of the reforming reaction tube 3, and the bellows 28 Expands and contracts in the axial direction of the reaction tube 3. This suppresses the occurrence of stress in the components of the reforming reaction tube 3, the raw material gas manifold 18, the reformed gas manifold 19, and the welded joint due to the difference in thermal elongation.

Therefore, also in the second embodiment, the bellows 28 absorbs the difference in thermal expansion, the bellows 28 is disposed on the outer surface of the reformer, and only one bellows 28 is required. The same effect as in the first embodiment can be obtained. Further, according to the second embodiment, the bellows 28 is installed on the reformed gas manifold body plate 24 constituting the reformed gas manifold 19 having a lower operating pressure due to the pressure loss of the catalyst layer 5 than the raw material gas manifold 18. Therefore, the pressure resistance of the bellows 28 is reduced, and the reliability can be improved accordingly.

The temperature of the reformed gas at the portion where the bellows 28 is attached is 550 ° C. or less. SUS
304, stainless steel material such as SUS316
The low cycle fatigue strength at 00 ° C. is about 150 kg / mm ² , and there is no problem in heat resistance. Such a general stainless steel material can be used as the bellows material.

Embodiment 3 FIG. 3 is a view showing a reforming apparatus according to Embodiment 3 of the present invention. FIG. 3 (a) is a longitudinal sectional view, and FIG. 3 (b) is a transverse sectional view.
In the third embodiment, the ring-shaped diaphragm 30 is disposed so as to constitute a part of the outer tube support plate 23 on the inner peripheral side and the outer peripheral side of the reforming reaction tube 3. The other configuration is the same as that of the first embodiment.

Next, the operation of the reformer according to the third embodiment will be described. Also in the reformer according to the third embodiment, a thermal expansion difference occurs between the inner pipe 3a and the outer pipe 3c as in the first embodiment. The inner tube 3a is fixed to the reforming furnace 1 via the inner tube support plate 21, the raw material gas manifold body plate 22, and the reformed gas manifold body plate 24. An axial expansion and contraction force of the reforming reaction tube 3 acts. The expansion and contraction force acting on the outer tube 3 c acts to expand and contract in the axial direction of the outer tube support plate 23 and the reforming reaction tube 3, and the diaphragm 30 is deformed in the axial direction of the reforming reaction tube 3. This suppresses the occurrence of stress in the components of the reforming reaction tube 3, the raw material gas manifold 18, the reformed gas manifold 19, and the welded joint due to the difference in thermal elongation.

Therefore, also in the third embodiment, the same effect as in the first embodiment can be obtained because the diaphragm 30 absorbs the difference in thermal expansion. Further, according to the third embodiment, the diaphragm 30 can have a thickness of about 1 mm to 3 mm as compared with the bellows 27 (about 0.3 mm in thickness), and the mechanical strength and durability can be increased. Reliability can be improved. Also, the diaphragm 30
Has a significantly simpler structure than the bellows 27, and the cost can be reduced.

Embodiment 4 FIG. 4 is a longitudinal sectional view showing a reforming apparatus according to Embodiment 4 of the present invention. In the fourth embodiment, the ring-shaped diaphragm 29 is disposed so as to form a part of the inner tube support plate 21 on the inner peripheral side and the outer peripheral side of the reforming reaction tube 3. The other configuration is the same as that of the first embodiment.

Next, the operation of the reformer according to the fourth embodiment will be described. Also in the reformer according to the fourth embodiment, a thermal expansion difference occurs between the inner pipe 3a and the outer pipe 3c as in the first embodiment. Since the outer tube 3c is fixed to the reforming furnace 1 via the outer tube support plate 23, an axial expansion and contraction force of the reforming reaction tube 3 acts on the inner tube 3a due to the difference in thermal expansion. The expansion and contraction force applied to the inner tube 3a is transmitted to the inner tube support plate 21, and the diaphragm 29 is moved to the reforming reaction tube 3a.
Deform in the axial direction of. This suppresses the occurrence of stress in the components of the reforming reaction tube 3, the raw material gas manifold 18, the reformed gas manifold 19, and the welded joint due to the difference in thermal elongation.

Therefore, also in the fourth embodiment, since the diaphragm 29 absorbs the difference in thermal expansion, the same effect as in the first embodiment can be obtained. According to the fourth embodiment, the diaphragm 29 can have a thickness of about 1 mm to 3 mm as compared with the bellows 27 (about 0.3 mm in thickness), and the mechanical strength and durability can be increased. Reliability can be improved. Also, the diaphragm 29
Has a significantly simpler structure than the bellows 27, and the cost can be reduced. Further, in the third embodiment, the diaphragm 30 faces the combustion space 8 and may be exposed to a high temperature. However, in the fourth embodiment, the diaphragm 29 is isolated from the combustion space 8, and the safety is improved. It has a simple structure.

Embodiment 5 FIG. In the fifth embodiment, as shown in FIG. 5, the combustion gas manifold 11 is communicated with the inner pipe 3a through the communication pipe 31 so that the inner pipe support plate 21
Are separated from the raw material gas manifold 18 in the axial direction of the reforming reaction tube 3. In addition,
Other configurations are the same as those of the fourth embodiment.
Therefore, also in the fifth embodiment, the same effect as in the fourth embodiment can be obtained. Further, according to the fifth embodiment, since the combustion gas manifold 11 is configured so as to be separated from the raw material gas manifold 18, the diaphragm 29 is exposed outside the reformer, and the welding workability of the diaphragm 29 is improved. , And excellent welding quality can be obtained, and breakage after manufacturing can be visually confirmed, so that reliability can be improved. Also,
The temperature inside the combustion gas manifold 11 is 600 ° C. to 650 ° C., but the temperature inside the raw material gas manifold 18 facing the diaphragm 29 is as low as 550 ° C. or less, so that the operating temperature of the diaphragm 29 is lowered and reliability is improved. .

[0028]

Since the present invention is configured as described above, it has the following effects.

According to the present invention, a combustion apparatus for generating high-temperature combustion gas by burning fuel and air, a reforming furnace for forming a combustion space for the combustion gas, An inner pipe that circulates, an outer pipe that is arranged concentrically outside the inner pipe, an intermediate pipe that is arranged concentrically between the inner pipe and the outer pipe, A first annular portion formed between the intermediate tube and the source gas, and
A catalyst layer formed by filling the first annular portion with a catalyst, and a reformed gas formed between the intermediate pipe and the outer pipe and formed by flowing the raw material gas through the catalyst layer And a second annular portion through which the first gas flows and one end of the inner pipe and the outer pipe opposite to the source gas introduction side, and
A reforming reaction tube comprising an end cap for communicating the reformed gas flowing out of the catalyst layer into the second annular portion, which communicates the annular portion with the second annular portion; A source gas manifold comprising an inner tube support plate for supporting the tube and a body plate for supplying the source gas to the first annular portion; an outer tube support plate and a body plate for supporting the outer tube and supporting the intermediate tube; And a reformed gas manifold configured to discharge the reformed gas from the second annular portion. The body plate of the raw material gas manifold is divided into a plurality in the axial direction of the reforming reaction tube. Then, since the divided body plate is configured to be hermetically welded and connected via a bellows, a difference in thermal elongation due to a temperature difference of the reforming reaction tube is absorbed by the bellows, and is generated in the reforming reaction tube and the manifold Reduce stress and longevity And it is possible to expand the range of operating conditions, weldability is improved, further can visually check welding of the bellows from the outside, the reforming device is obtained which can improve reliability.

Further, according to the present invention, a combustion apparatus for generating high-temperature combustion gas by burning fuel and air, a reforming furnace for forming a combustion space for the combustion gas, and An inner pipe flowing through the inside, an outer pipe concentrically disposed outside the inner pipe, an intermediate pipe concentrically disposed between the inner pipe and the outer pipe, and the inner pipe A first annular portion formed between the first annular portion and the intermediate tube, into which a raw material gas is introduced, a catalyst layer formed by filling the first annular portion with a catalyst, the intermediate tube and the outer tube, And a second annular portion through which the reformed gas generated by flowing the raw material gas through the catalyst layer flows, and a second annular portion of the inner pipe and the outer pipe opposite to the raw material gas introduction side. Located at one end,
A reforming reaction tube comprising an end cap for communicating the first annular portion and the second annular portion and allowing the reformed gas flowing out of the catalyst layer to flow into the second annular portion; A source gas manifold comprising an inner tube support plate for supporting the inner tube and a body plate for supplying the source gas to the first annular portion; an outer tube support plate and a body plate for supporting the outer tube; A reformed gas manifold comprising an intermediate pipe supporting plate for supporting the pipe, and discharging the reformed gas from the second annular portion, wherein a body plate of the reformed gas manifold is disposed in an axial direction of the reforming reaction tube. Is divided into a plurality of parts, and the divided body plate is air-tightly welded and connected via a bellows, so that a difference in thermal expansion due to a temperature difference of the reforming reaction tube is absorbed by the bellows, and the reforming reaction tube is And manifold stresses are reduced , Can expand the scope of long life and operating conditions, weldability is improved, further can visually check welding of the bellows from the outside, the reforming device is obtained which can improve reliability. Further, the bellows is provided in the reformed gas manifold having a low operating pressure, and the pressure resistance of the bellows is reduced, so that the reliability can be improved accordingly.

Further, according to the present invention, a combustion apparatus for generating high-temperature combustion gas by burning fuel and air, a reforming furnace for forming a combustion space for the combustion gas, and An inner pipe flowing through the inside, an outer pipe concentrically disposed outside the inner pipe, an intermediate pipe concentrically disposed between the inner pipe and the outer pipe, and the inner pipe A first annular portion formed between the first annular portion and the intermediate tube, into which a raw material gas is introduced, a catalyst layer formed by filling the first annular portion with a catalyst, the intermediate tube and the outer tube, And a second annular portion through which the reformed gas generated by flowing the raw material gas through the catalyst layer flows, and a second annular portion of the inner pipe and the outer pipe opposite to the raw material gas introduction side. Located at one end,
A reforming reaction tube comprising an end cap for communicating the first annular portion and the second annular portion and allowing the reformed gas flowing out of the catalyst layer to flow into the second annular portion; A source gas manifold comprising an inner tube support plate for supporting the inner tube and a body plate for supplying the source gas to the first annular portion; an outer tube support plate and a body plate for supporting the outer tube; A reformed gas manifold comprising a middle tube supporting plate for supporting the pipe, and discharging the reformed gas from the second annular portion, wherein the diaphragm includes the reforming reaction tube in a part of the outer tube supporting plate. Since it is provided in a ring shape so as to surround it, the difference in thermal expansion due to the temperature difference in the reforming reaction tube is absorbed by the diaphragm, the stress generated in the reforming reaction tube and the manifold is reduced, and the long life and operating condition range Can be expanded The thickness of the diaphragm can be thicker than the thickness of the bellows, the reformer can be obtained can be improved by that amount reliability.

Further, according to the present invention, a combustion device for generating high-temperature combustion gas by burning fuel and air, a reforming furnace for forming a combustion space for the combustion gas, and An inner pipe flowing through the inside, an outer pipe concentrically disposed outside the inner pipe, an intermediate pipe concentrically disposed between the inner pipe and the outer pipe, and the inner pipe A first annular portion formed between the first annular portion and the intermediate tube, into which a raw material gas is introduced, a catalyst layer formed by filling the first annular portion with a catalyst, the intermediate tube and the outer tube, And a second annular portion through which the reformed gas generated by flowing the raw material gas through the catalyst layer flows, and a second annular portion of the inner pipe and the outer pipe opposite to the raw material gas introduction side. Located at one end,
A reforming reaction tube comprising an end cap for communicating the first annular portion and the second annular portion and allowing the reformed gas flowing out of the catalyst layer to flow into the second annular portion; A source gas manifold comprising an inner tube support plate for supporting the inner tube and a body plate for supplying the source gas to the first annular portion; an outer tube support plate and a body plate for supporting the outer tube; A reformed gas manifold comprising an intermediate tube supporting plate for supporting the pipe, and discharging the reformed gas from the second annular portion, wherein the diaphragm includes the reforming reaction tube in a part of the inner tube supporting plate. Since it is provided in a ring shape so as to surround it, the difference in thermal expansion due to the temperature difference in the reforming reaction tube is absorbed by the diaphragm, the stress generated in the reforming reaction tube and the manifold is reduced, and the long life and operating condition range Can be expanded The thickness of the diaphragm can be thicker than the thickness of the bellows, the reformer can be obtained can be improved by that amount reliability.

Further, according to the present invention, a combustion apparatus for generating high-temperature combustion gas by burning fuel and air, a reforming furnace for forming a combustion space for the combustion gas, and An inner pipe flowing through the inside, an outer pipe concentrically disposed outside the inner pipe, an intermediate pipe concentrically disposed between the inner pipe and the outer pipe, and the inner pipe A first annular portion formed between the first annular portion and the intermediate tube, into which a raw material gas is introduced, a catalyst layer formed by filling the first annular portion with a catalyst, the intermediate tube and the outer tube, And a second annular portion through which the reformed gas generated by flowing the raw material gas through the catalyst layer flows, and a second annular portion of the inner pipe and the outer pipe opposite to the raw material gas introduction side. Located at one end,
A reforming reaction tube comprising an end cap for communicating the first annular portion and the second annular portion and allowing the reformed gas flowing out of the catalyst layer to flow into the second annular portion; A source gas manifold comprising an inner tube support plate for supporting the inner tube and a body plate for supplying the source gas to the first annular portion; an outer tube support plate and a body plate for supporting the outer tube; A reformed gas manifold comprising an intermediate pipe supporting plate for supporting the pipe and discharging the reformed gas from the second annular portion; and a combustion gas manifold for discharging the combustion gas flowing through the inner pipe. The combustion gas manifold is communicated with the inner pipe through a communication pipe, and is disposed apart from the inner pipe support plate in the axial direction of the reforming reaction tube, and the diaphragm is provided with the inner pipe support plate. Part of the above reforming reaction tube Since it is provided in a ring shape so as to surround it, the difference in thermal expansion due to the temperature difference in the reforming reaction tube is absorbed by the diaphragm, the stress generated in the reforming reaction tube and the manifold is reduced, and the long life and operating condition range The thickness of the diaphragm can be made larger than the thickness of the bellows, and the diaphragm can be visually confirmed from the outside, thereby improving the reliability. In addition, the inner tube support plate is separated from the hot combustion gas manifold, lowering the operating temperature of the diaphragm,
The reliability can be improved accordingly.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a reforming apparatus according to Embodiment 1 of the present invention.

FIG. 2 is a sectional view showing a reforming apparatus according to Embodiment 2 of the present invention.

FIG. 3 is a sectional view showing a reforming apparatus according to Embodiment 3 of the present invention.

FIG. 4 is a sectional view showing a reforming apparatus according to Embodiment 4 of the present invention.

FIG. 5 is a sectional view showing a reforming apparatus according to Embodiment 5 of the present invention.

FIG. 6 is a sectional view showing a conventional reformer.

[Explanation of symbols]

Reference Signs List 1 reforming furnace, 3 reforming reaction tube, 3a inner tube, 3b intermediate tube, 3c outer tube, 3d end cap, 4 first annular portion, 5 catalyst layer, 6 second annular portion, 7 combustion device, 8
Combustion space, 11 combustion gas manifold, 18 raw gas manifold, 19 reformed gas manifold, 21 inner tube support plate, 22 raw gas manifold body plate, 23 outer tube support plate, 24 reformed gas manifold body plate, 25 intermediate tube support Board, 27, 28 bellows,
29, 30 diaphragm, 31 communicating pipe.

Claims (5)

[Claims] 1. A combustion device for generating high-temperature combustion gas by burning fuel and air, a reforming furnace for forming a combustion space for the combustion gas, and an inner pipe through which the combustion gas flows. And an outer pipe concentrically disposed outside the inner pipe, an intermediate pipe concentrically disposed between the inner pipe and the outer pipe, and the inner pipe and the intermediate pipe. A first annular portion formed between the first annular portion, into which the source gas is introduced, a catalyst layer formed by filling the first annular portion with a catalyst, and a catalyst layer formed between the intermediate pipe and the outer pipe. A second annular portion through which the reformed gas generated by the raw material gas flowing through the catalyst layer flows, and disposed at one end of the inner pipe and the outer pipe opposite to the raw material gas introduction side, The first annular portion communicates with the second annular portion, and the reformed gas flowing out of the catalyst layer is supplied to the second annular portion. A reforming reaction tube comprising an end cap for flowing into the annular portion; a source gas manifold comprising an inner tube support plate and a body plate for supporting the inner tube and supplying the source gas to the first annular portion; A reformed gas manifold comprising an outer tube support plate and a body plate for supporting the outer tube, and an intermediate tube support plate for supporting the intermediate tube, wherein the reformed gas is discharged from the second annular portion; The reformer is characterized in that the shell plate of the raw material gas manifold is divided into a plurality in the axial direction of the reforming reaction tube, and the divided shell plates are hermetically welded and connected via bellows. apparatus. 2. A combustion apparatus for generating high-temperature combustion gas by burning fuel and air, a reforming furnace for forming a combustion space for the combustion gas, and an inner pipe through which the combustion gas flows. And an outer pipe concentrically disposed outside the inner pipe, an intermediate pipe concentrically disposed between the inner pipe and the outer pipe, and the inner pipe and the intermediate pipe. A first annular portion formed between the first annular portion, into which the source gas is introduced, a catalyst layer formed by filling the first annular portion with a catalyst, and a catalyst layer formed between the intermediate pipe and the outer pipe. A second annular portion through which the reformed gas generated by the raw material gas flowing through the catalyst layer flows, and disposed at one end of the inner pipe and the outer pipe opposite to the raw material gas introduction side, The first annular portion communicates with the second annular portion, and the reformed gas flowing out of the catalyst layer is supplied to the second annular portion. A reforming reaction tube comprising an end cap for flowing into the annular portion; a source gas manifold comprising an inner tube support plate and a body plate for supporting the inner tube and supplying the source gas to the first annular portion; A reformed gas manifold comprising an outer tube support plate and a body plate for supporting the outer tube, and an intermediate tube support plate for supporting the intermediate tube, wherein the reformed gas is discharged from the second annular portion; The reforming gas manifold body plate is divided into a plurality in the axial direction of the reforming reaction tube, and the divided body plates are hermetically welded and connected via bellows. Quality equipment. 3. A combustion device for generating high-temperature combustion gas by burning fuel and air, a reforming furnace for forming a combustion space for the combustion gas, and an inner pipe through which the combustion gas flows. And an outer pipe concentrically disposed outside the inner pipe, an intermediate pipe concentrically disposed between the inner pipe and the outer pipe, and the inner pipe and the intermediate pipe. A first annular portion formed between the first annular portion, into which the source gas is introduced, a catalyst layer formed by filling the first annular portion with a catalyst, and a catalyst layer formed between the intermediate pipe and the outer pipe. A second annular portion through which the reformed gas generated by the raw material gas flowing through the catalyst layer flows, and disposed at one end of the inner pipe and the outer pipe opposite to the raw material gas introduction side, The first annular portion communicates with the second annular portion, and the reformed gas flowing out of the catalyst layer is supplied to the second annular portion. A reforming reaction tube comprising an end cap for flowing into the annular portion; a source gas manifold comprising an inner tube support plate and a body plate for supporting the inner tube and supplying the source gas to the first annular portion; A reformed gas manifold comprising an outer tube support plate and a body plate for supporting the outer tube, and an intermediate tube support plate for supporting the intermediate tube, wherein the reformed gas is discharged from the second annular portion; A reformer characterized in that a diaphragm is provided on a part of the outer tube support plate in a ring shape so as to surround the reforming reaction tube. 4. A combustion apparatus for generating high-temperature combustion gas by burning fuel and air; a reforming furnace for forming a combustion space for the combustion gas; and an inner pipe through which the combustion gas flows. And an outer pipe concentrically disposed outside the inner pipe, an intermediate pipe concentrically disposed between the inner pipe and the outer pipe, and the inner pipe and the intermediate pipe. A first annular portion formed between the first annular portion, into which the source gas is introduced, a catalyst layer formed by filling the first annular portion with a catalyst, and a catalyst layer formed between the intermediate pipe and the outer pipe. A second annular portion through which the reformed gas generated by the raw material gas flowing through the catalyst layer flows, and disposed at one end of the inner pipe and the outer pipe opposite to the raw material gas introduction side, The first annular portion communicates with the second annular portion, and the reformed gas flowing out of the catalyst layer is supplied to the second annular portion. A reforming reaction tube comprising an end cap for flowing into the annular portion; a source gas manifold comprising an inner tube support plate and a body plate for supporting the inner tube and supplying the source gas to the first annular portion; A reformed gas manifold comprising an outer tube support plate and a body plate for supporting the outer tube, and an intermediate tube support plate for supporting the intermediate tube, wherein the reformed gas is discharged from the second annular portion; A reformer, wherein a diaphragm is provided on a part of the inner tube support plate in a ring shape so as to surround the reforming reaction tube. 5. A combustion device for generating high-temperature combustion gas by burning fuel and air, a reforming furnace for forming a combustion space for the combustion gas, and an inner pipe through which the combustion gas flows. And an outer pipe concentrically disposed outside the inner pipe, an intermediate pipe concentrically disposed between the inner pipe and the outer pipe, and the inner pipe and the intermediate pipe. A first annular portion formed between the first annular portion, into which the source gas is introduced, a catalyst layer formed by filling the first annular portion with a catalyst, and a catalyst layer formed between the intermediate pipe and the outer pipe. A second annular portion through which the reformed gas generated by the raw material gas flowing through the catalyst layer flows, and disposed at one end of the inner pipe and the outer pipe opposite to the raw material gas introduction side, The first annular portion communicates with the second annular portion, and the reformed gas flowing out of the catalyst layer is supplied to the second annular portion. A reforming reaction tube comprising an end cap for flowing into the annular portion; a source gas manifold comprising an inner tube support plate and a body plate for supporting the inner tube and supplying the source gas to the first annular portion; A reformed gas manifold comprising an outer tube support plate and a body plate for supporting the outer tube, and an intermediate tube support plate for supporting the intermediate tube, for discharging the reformed gas from the second annular portion; And a combustion gas manifold for discharging the combustion gas that has passed therethrough, wherein the combustion gas manifold is communicated with the inner tube through a communication tube, and the reforming reaction tube is connected to the inner tube support plate. A reformer, which is disposed apart from each other in the axial direction, and a diaphragm is provided in a ring shape on a part of the inner tube support plate so as to surround the reforming reaction tube.