JPH0826701A - Reformer - Google Patents

Abstract

PURPOSE:To reduce the stress generated in the refining reaction tube and manifold, to prolong the service life of the reformer and to expand the operating condition range by connecting an inner tube and a raw gas manifold with a bellows. CONSTITUTION:The raw gas introduced into a refining furnace 1 from a raw gas inlet 15 is sent to a refining reaction furnace 3 through a raw gas manifold 18 and a bellows 26. The raw gas is then passed through a catalyst bed 5 packed in the first annular part 4 between an inner tube 3a and an intermediate tube 3b to obtain a hydrogen-rich reformed gas. The flow direction of the reformed gas is reversed in an end cap 3d, and the reformed gas is passed through the second annular part 6 between the intermediate tube 3b and an outer tube 3c and discharged outside the furnace through a reformed gas manifold 19. Meanwhile, the fuel supplied from a fuel inlet 13 is passed through a fuel tube 7a, introduced into a combustion space, mixed with a combustion air supplied from an air inlet 14 and injected from an air injection part 7b and burned in the combustion space 8. The combustion gas is passed through a combustion tube 28 and then through the refining tube 3 and discharged from an outlet 17 via a combustion gas manifold 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reformer, and more particularly to a reformer capable of reducing stress generated in a reforming reaction tube and a manifold, and having a long life and a wide range of operating conditions.

[0002]

2. Description of the Related Art FIG. 9 is a sectional view showing a conventional reforming apparatus disclosed in, for example, Japanese Unexamined Patent Publication No. 4-89301. Figure 9
In FIG. 1, 1 is a reforming furnace, 2 is a heat insulating material for preventing heat radiation, 3 is an annular reforming reaction tube, and is composed of an inner tube 3a, an intermediate tube 3b, an outer tube 3c, a triple tube, an inner tube 3a and an outer tube 3c. It is composed of an annular end cap 3d arranged at the end. 4 is the inner tube 3a and the intermediate tube 3
b is a catalyst layer formed by filling the first annular portion with a catalyst, and 6 is an intermediate tube 3b and an outer tube 3c. Formed between
The second annular portion, in which the reformed gas generated by the reforming reaction performed by the raw material gas flowing through the catalyst layer 5 flows, 7
Is a combustion device, which is composed of a fuel pipe 7a and an air ejection hole 7b. 7c shows the flame of the combustion device, and 8 shows the combustion space. Reference numeral 9 is a filler, 10 is a wire mesh for holding the filler 9, and 11 is a combustion gas manifold that is burned by the combustion device 7 and passes through the inner pipe 3a and is discharged. Reference numeral 12 denotes a heat insulating material, which prevents the combustion gas from heating the outer tube. Reference numeral 13 is a fuel inlet, and 14 is an air inlet. Reference numeral 15 is a raw material gas inlet, 16 is a reformed gas outlet, and 17 is a combustion gas outlet. Reference numeral 18 is a raw material gas manifold for distributing the raw material of the reformer to the reforming reaction tube 3, and 19 is a reforming gas manifold for discharging the reformed gas produced in the reforming reaction tube. Reference numeral 20 is a combustion tube for circulating the combustion gas generated in the combustion device 7.

Next, the operation will be described. A mixed gas of fuel and steam, which is a 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 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 its flow direction in the end cap 3d, passes through the second annular portion 6 between the intermediate pipe 3b and the outer pipe 3c, gathers in the reformed gas manifold 19, and is taken out of the reforming furnace 1. Since the above-mentioned reforming reaction is an intense endothermic reaction, it is necessary to supply heat to the reforming reaction tube 3 in order to continue the reaction. Therefore, the combustion device 7 is provided in the reforming furnace 1, and Heat is supplied from combustion gas. The fuel supplied from the fuel inlet 14 passes through the fuel pipe 7a and exits into the combustion space. There, it is mixed with the combustion air ejected from the air introduction port 14 through the air ejection hole 7b and burned in the combustion space 8. In order to prevent the flame from coming into contact with the reforming reaction tube, it is necessary to shift the combustion device 7 downward with respect to the reforming reaction tube and attach it to the reforming furnace 1 to enlarge the combustion space 8. The high-temperature combustion gas burned in the combustor 7 passes through the center of the annular reforming reaction tube 3 and is collected 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 of promoting heat transfer from the combustion gas to the inner pipe. The heat insulating material 12 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, the inner tube 3a side, the inner tube 3a has a higher temperature than the outer tube 3c.

[0004]

Since the conventional reforming apparatus is constructed as described above, a temperature difference is generated between the inner tube 3a and the outer tube 3c, and the difference in thermal expansion is caused by the reforming reaction tube 3, The range of operating conditions has been narrowly limited so that stress is generated in the raw material gas manifold 18 and the reforming gas manifold 19 to shorten the life of the reforming apparatus and reduce the temperature difference.

The present invention has been made in order to solve the above problems, and absorbs the difference in thermal expansion due to the temperature difference in the reforming reaction tube or reduces the temperature difference in the reforming reaction tube. The purpose of the present invention is to obtain a reforming device which can reduce the stress generated in the reforming reaction tube and the manifold, and have a long life and a wide range of operating conditions.

[0006]

The reforming apparatus according to the first aspect of the present invention comprises an inner tube and a raw material gas manifold connected by a bellows.

In the reformer according to the second aspect of the present invention, the outer pipe and the reformed gas manifold are connected by a bellows.

In the reforming apparatus according to the third aspect of the present invention, the end cap is a thin plate single layer or multi-layer structure, and the end cap has flexibility.

In the reformer according to the fourth aspect of the present invention, the inner pipe support plate of the raw material gas manifold supporting the inner pipe is a thin plate and is an elastic support plate having flexibility.

In the reforming apparatus according to the fifth aspect of the present invention, the inner tube supporting plate of the raw material gas manifold supporting the inner tube and the outer tube supporting plate of the reformed gas manifold supporting the outer tube may be thin plates. This is an elastic support plate having flexibility.

According to a sixth aspect of the present invention, the reforming apparatus has an inner tube and an intermediate tube connected to each other and an intermediate tube and an outer tube connected to each other with a thermal anchor made of a highly heat-conductive material.

In the reforming apparatus according to the seventh aspect of the present invention, the bellows is provided on the body plate of the raw material gas manifold.

In the reforming apparatus according to the eighth aspect of the present invention, the bellows are provided on the body plate of the raw material gas manifold and the body plate of the reformed gas manifold.

[0014]

In the reforming apparatus according to the first aspect of the present invention, the bellows connected to the inner pipe absorbs the difference in thermal expansion between the inner pipe and the outer pipe, whereby the reforming reaction pipe and the raw material gas manifold,
The stress generated in the reformed gas manifold can be suppressed.

In the reformer according to claim 2 of the present invention,
Since the bellows connected to the outer tube absorbs the difference in thermal expansion between the inner tube and the outer tube, the stress generated in the reforming reaction tube, the raw material gas manifold, and the reforming gas manifold can be suppressed.

In the reformer according to claim 3 of the present invention,
The difference in thermal expansion between the inner pipe and the outer pipe is absorbed by the flexible end cap, so that the stress generated in the reforming reaction pipe, the raw material gas manifold, and the reforming gas manifold can be suppressed.

In the reformer according to claim 4 of the present invention,
By absorbing the thermal expansion difference between the inner tube and the outer tube by the elastic support plate of the raw material gas manifold having flexibility, the stress generated in the reforming reaction tube, the raw material gas manifold, and the reforming gas manifold can be suppressed. it can.

In the reformer according to the fifth aspect of the present invention,
The elastic support plate of the raw material gas manifold and the elastic support plate of the reformed gas manifold, which have flexibility in thermal expansion difference between the inner tube and the outer tube, are absorbed, so that the reforming reaction tube, the raw material gas manifold, and the reformed gas are absorbed. It is possible to suppress the stress generated in the manifold.

In the reformer according to claim 6 of the present invention,
The thermal conduction in the thermal anchors between the inner tube, the intermediate tube and the outer tube suppresses the temperature difference between the inner tube and the outer tube, and the stress generated in the reforming reaction tube, the raw material gas manifold, and the reforming gas manifold. Can be suppressed.

In the reformer according to the seventh aspect of the present invention,
The bellows provided on the shell plate of the raw material gas manifold absorbs the difference in thermal expansion between the inner tube and the outer tube, so that the stress generated in the reforming reaction tube, the raw material gas manifold, and the reformed gas manifold can be suppressed.

In the reformer according to claim 8 of the present invention,
The difference in thermal expansion between the inner tube and the outer tube is absorbed by the bellows provided on the shell plate of the raw material gas manifold and the shell plate of the reformed gas manifold, and is generated in the reforming reaction tube, the raw material gas manifold, and the reformed gas manifold. The stress can be suppressed.

[0022]

【Example】

Example 1. Embodiments of the present invention will be described below with reference to the drawings. Example 1 corresponds to the reforming apparatus of claim 1.
FIG. 1 is a cross-sectional view of a reforming apparatus showing a first embodiment. In the figure, 1 to 20 are the same as or equivalent to those of the conventional reforming apparatus shown in FIG. ,
The description is omitted here. Reference numeral 21 denotes an inner pipe support plate for supporting the inner pipe 3a, 22 denotes a source gas manifold shell plate, and 21 and 22 constitute a source gas manifold 18. Reference numeral 23 is an outer pipe support plate that supports the outer pipe 3c, 24 is a reformed gas manifold body plate, 25 is an intermediate pipe support plate that supports the intermediate pipe 3b, and the reformed gas manifold 19 is composed of 23 to 25. . The inner pipe 3a and the inner pipe support plate 21 are welded to each other via an inner pipe bellows 26.

Next, the operation of the first embodiment will be described. A mixed gas of fuel and steam, which is a raw material gas of the reformer, is introduced into the reforming furnace 1 through the raw material gas inlet 16, distributed by the raw material gas manifold 18, and sent to the reforming reaction tube 3. The raw material gas causes 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 its flow direction in the end cap 3d, and the intermediate pipe 3
After passing through the second annular portion 6 between the b and the outer pipe 3c, they are collected by the reformed gas manifold 19 and taken out of the reforming furnace 1. Since the above-mentioned reforming reaction is an intense endothermic reaction, it is necessary to supply heat to the reforming reaction tube 3 in order to continue the reaction. Therefore, the 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 passes through the fuel pipe 7a and exits into the combustion space. Therefore, the air ejection holes 7b supplied from the air introduction port 14 are supplied.
It is mixed with the combustion air that is further ejected and burns in the combustion space 8. The high-temperature combustion gas burned in the combustor 7 passes through the inside of the combustion tube 20 and changes the flow direction in the lower furnace space by 180 degrees and flows inside the inner tube of each reforming reaction tube. The combustion gas then collects at 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 average temperature in the axial direction of the inner pipe 3a is higher than the average temperature in the axial direction of the outer pipe 3c by about 50 to 200 ° C., and the difference in thermal expansion in the axial direction of about 5 mm at the maximum between the inner pipe 3a and the outer pipe 3c. Cause This thermal expansion difference is the bellows for the inner tube 2
Since 6 absorbs, the generation of stress in the reforming reaction tube 3, the raw material gas manifold 18, and the reforming gas manifold 19 is suppressed. If the wall thickness of the inner tube bellows 26 is set to about 0.3 mm, the inner tube bellows 26 will have a thermal expansion difference of 5 mm.
The stress generated in the can be suppressed to about 60 kgf / mm ² . On the other hand, the temperature of the combustion gas is 600 ° C. or lower at the portion where the inner pipe bellows 26 is attached. SUS3
04, 60 of general-purpose stainless steel such as SUS316
The low cycle fatigue strength at 0 ° C is about 150 kgf / mm ² , and there is no problem with the heat resistance strength of the bellows material.

Embodiment 2 FIG. Next, an embodiment of the reforming apparatus corresponding to claim 2 of the present invention will be described with reference to FIG. In FIG. 2, 1 to 25 are the same as in FIG. An outer pipe bellows 27 connects the outer pipe 3c and the outer pipe support plate 23 by welding.

Next, the operation of the second embodiment will be described. The reforming apparatus of the second embodiment also causes a difference in thermal expansion between the inner pipe 3a and the outer pipe 3c as in the first embodiment. This difference in thermal expansion is absorbed by the outer tube bellows 27, so that the reforming reaction tube 3, the raw material gas manifold 18 and the reforming gas manifold 19 are absorbed.
The generation of stress is suppressed. The wall thickness and the generated stress of the outer tube bellows 27 are the same as those of the inner tube bellows of the reformer of the first embodiment. On the other hand, in the reformed gas manifold 19 to which the outer tube bellows 27 is attached, the temperature of the reformed gas is 550 ° C. or lower, which is lower than that of the inner tube bellows of the reformer of Example 1, and the fatigue strength of the material. And the reliability of the heat resistance of the bellows is improved. Others are the same as those of the reformer of the first embodiment.

Example 3. Next, an embodiment corresponding to claim 3 will be described with reference to FIG. 1 to 25 in FIG.
Is the same as in FIG. However, an elastic end cap 28 having a multi-layer structure of thin plates is provided in place of the end cap 3e in FIG. However, the elastic end cap 28 may have a single layer structure.

Next, the operation of the third embodiment will be described. The reforming apparatus of the third embodiment also causes a difference in thermal expansion between the inner pipe 3a and the outer pipe 3c as in the first embodiment. Since the elastic end cap 28 absorbs this difference in thermal expansion, the generation of stress in the reforming reaction tube 3, the raw material gas manifold 18, and the reforming gas manifold 19 is suppressed. If the thickness of the elastic end cap 28 is about 0.3 mm, the stress generated in the elastic end cap 28 can be suppressed to about 40 kgf / mm ² due to the difference in thermal expansion of 5 mm. On the other hand, it is possible to operate by limiting the temperature of the elastic end cap 28 to about 800 ° C. or lower while maintaining the reforming reaction. The low cycle fatigue strength of high temperature stainless steel materials such as SUS310S at 800 ° C. is about 100 kgf / mm ^2, and the multilayer structure of thin plates improves the pressure resistance and the reliability against high temperature oxidation. Others are the same as those of the reformer of the first embodiment.

Example 4. Next, an embodiment corresponding to claim 4 will be described with reference to FIG. 1 to 25 in FIG.
Is the same as in FIG. However, the inner pipe support plate 21 of FIG.
Instead, an inner tube elastic support plate 21a having a thin plate structure is provided.

Next, the operation will be described. In Example 4, as in Example 1, a difference in thermal expansion occurs between the inner pipe 3a and the outer pipe 3c. Since the inner tube elastic support plate 21a absorbs this thermal expansion difference, the reforming reaction tube 3 and the raw material gas manifold 18,
Generation of stress in the reformed gas manifold 19 is suppressed. If the wall thickness of the inner pipe elastic support plate 21a is set to about 4 mm and the length from the inner pipe 3a to the source gas manifold body plate 22 is set to about 150 mm, the stress generated in the inner pipe elastic support plate 21a due to the thermal expansion difference of 5 mm. Can be suppressed to about 70 kgf / mm ² . On the other hand, raw material gas manifold 1
In No. 8, the temperature of the raw material gas is 550 ° C. or lower. SUS3
04, 60 of general-purpose stainless steel such as SUS316
The low cycle fatigue strength at 0 ° C is about 150 kgf / mm ² , and there is no problem with the heat resistance strength of the elastic support plate material for the inner tube. Others are the same as those of the reformer of the first embodiment.

Example 5. Next, an embodiment of the reforming device corresponding to claim 5 will be described with reference to FIG. In FIG. 5, 1 to 25 are the same as in FIG. However, instead of the outer tube support plate 23 in FIG. 4, an outer tube elastic support plate 23a having a thin plate structure is used.
Is provided.

Next, the operation will be described. In Example 5 as well, as in Example 1, a difference in thermal expansion occurs between the inner pipe 3a and the outer pipe 3c. This thermal expansion difference is shared and absorbed by the inner tube elastic support plate 21a and the outer tube elastic support plate 23a, so that the reforming reaction tube 3
The generation of stress in the raw material gas manifold 18 and the reformed gas manifold 19 can be suppressed. Inner tube elastic support plate 21
a, the thickness of the outer pipe elastic support plate 23a is about 4 mm, the length from the inner pipe 3a to the raw material gas manifold body plate 22 and the length from the outer pipe 3c to the reformed gas manifold body plate 24 are about 150 mm. Then, the stress generated in the inner tube elastic support plate 21a and the outer tube elastic support plate 23a due to the thermal expansion difference of 5 mm is 35 kgf / half that of the reformer shown in the fourth embodiment.
It can be suppressed to about mm ² . On the other hand, in the source gas manifold 18, the temperature of the source gas is 550 ° C. or lower, and in the reformed gas manifold 19, the temperature of the reformed gas is 550 ° C.
It is the following. Low cycle fatigue strength at 600 ° C of general-purpose stainless steel materials such as SUS304 and SUS316 is 1
It is about 50 kgf / mm ² , and there is no problem in the heat resistance strength of the inner pipe elastic support plate material and the outer pipe elastic support plate material. Others are the same as those of the reformer of the first embodiment.

Example 6. Next, an embodiment corresponding to claim 6 will be described with reference to FIG. 1 to 25 in FIG.
Is the same as in FIG. Reference numeral 29 is a thermal anchor which is a high thermal conductive material. 29a connects the inner pipe 3a and the intermediate pipe 3b. For example, a plurality of block-shaped thermal anchors are radially arranged and welded on the outer diameter side of the inner pipe 3a, and the intermediate pipe 3b is shrink-fitted. . Reference numeral 29b connects the intermediate pipe 3b and the outer pipe 3c. For example, a plurality of block-shaped thermal anchors are radially arranged and welded on the outer diameter side of the intermediate pipe 3b, and the outer pipe 3c is shrink-fitted. .

Next, the operation of the sixth embodiment will be described. According to the configuration of the sixth embodiment, the heat from the combustion gas is transferred from the inner pipe 3a heated by the combustion gas to the intermediate pipe 3b by the thermal conduction of the thermal anchor 29a, and the heat from the intermediate pipe 3b to the outside by the thermal conduction of the thermal anchor 29b. Heat is transferred to the tube 3c. The gap between the inner pipe 3a and the outer pipe 3c is about 30 mm, and the temperature difference due to the thermal resistance of the thermal anchor 29 itself is 2 at maximum.
It is about 0 ° C. Due to this heat conduction, the inner pipe 3a and the outer pipe 3c
The temperature difference is reduced to about 40 ° C., and the generation of stress in the reforming reaction tube 3, the raw material gas manifold 18, and the reforming gas manifold 19 is suppressed. Others are the same as those of the reformer of the first embodiment.

Example 7. Next, an embodiment of the reforming device corresponding to claim 7 will be described with reference to FIG. 7, 1 to 25 are the same as those in FIG. Reference numeral 30 denotes a raw material gas manifold shell plate bellows provided on the raw material gas manifold shell plate 22. The raw material gas manifold shell bellows 30 may be welded to the raw material gas manifold shell 22 or may be formed by bending the raw material gas manifold shell 22.

Next, the operation will be described. In Example 7, similarly to the reforming apparatus of Example 1, a difference in thermal expansion occurs between the inner pipe 3a and the outer pipe 3c. The raw material gas manifold shell plate bellows 30 absorbs this difference in thermal expansion, so that the reforming reaction tube 3
The generation of stress in the raw material gas manifold 18 and the reformed gas manifold 19 can be suppressed. If the thickness of the raw material gas manifold shell plate bellows 30 is set to about ² mm, the stress generated in the raw material gas manifold shell plate bellows 30 due to the thermal expansion difference of 5 mm can be suppressed to about 70 kgf / mm ² . On the other hand, in the raw material gas manifold 18, the temperature of the raw material gas is 550 ° C. or lower. SUS304, SU
The low cycle fatigue strength of general-purpose stainless steel materials such as S316 at 600 ° C. is about 150 kgf / mm ² , and there is no problem with the heat resistance strength of the raw material gas manifold shell plate bellows material. Others are the same as those of the reformer of the first embodiment.

Example 8. Next, an example of the reforming apparatus of Example 8 will be described with reference to FIG. 1 to 25 in FIG.
And 30 are the same as in FIG. Reference numeral 31 is a reformed gas manifold shell plate bellows provided on the reformed gas manifold shell plate 24. The reformed gas manifold shell bellows 31 may be welded to the reformed gas manifold shell 24 or may be formed by bending the reformed gas manifold shell 24.

Next, the operation will be described. The reformer of the eighth embodiment is also similar to the reformer of the first embodiment, in which the inner pipe 3a and the outer pipe 3 are provided.
A difference in thermal elongation is generated between c. This difference in thermal expansion is shared and absorbed by the raw material gas manifold shell plate bellows 30 and the reformed gas manifold shell plate bellows 31, so that the generation of stress in the reforming reaction tube 3, the raw material gas manifold 18, and the reformed gas manifold 19 is suppressed. To be If the wall thicknesses of the raw material gas manifold shell plate bellows 30 and the reformed gas manifold shell plate bellows 31 are set to about 2 mm, the raw material gas manifold shell plate bellows 3 due to the thermal expansion difference of 5 mm.
0, the stress generated in the reformed gas manifold shell bellows 31 can be suppressed to about 35 kgf / mm ^2, which is half of that of the reformer of the seventh embodiment. On the other hand, in the raw material gas manifold 18, the temperature of the raw material gas is 550 ° C. or lower, and in the reformed gas manifold 19, the temperature of the reformed gas is 550 ° C. or lower. The low cycle fatigue strength of general-purpose stainless steel materials such as SUS304 and SUS316 at 600 ° C is 150 kgf /
Since it is about mm ² , there is no problem about the heat resistance strength of the raw material gas manifold body plate bellows material and the modified gas manifold body plate bellows material. Others are the same as those of the reformer of the first embodiment.

[0038]

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

According to the reforming apparatus of the first aspect of the present invention, the combustion apparatus for generating the high temperature combustion gas by burning the fuel and the air, the reforming furnace for forming the combustion gas space, the above An inner pipe in which combustion gas flows inside, an outer pipe concentrically arranged outside the inner pipe, and an intermediate pipe concentrically arranged between the inner pipe and the outer pipe, A first annular portion formed between the inner pipe and the intermediate pipe, into which a source gas is introduced, a catalyst layer formed by filling the first annular portion with a catalyst, the intermediate pipe, and the A second annular portion formed between the inner tube and the outer tube, the second annular portion being formed between the inner tube and the outer tube, through which the reformed gas generated by flowing the raw material gas through the catalyst layer flows. The catalyst layer is disposed at one end on the opposite side and connects the first annular portion and the second annular portion to each other. A reforming reaction tube composed of an end cap for allowing the discharged reformed gas to flow into the second annular portion, an inner tube supporting plate for supporting the inner tube, and a body plate, and the raw material gas for the first gas Of the raw material gas to be supplied to the annular portion, an outer tube supporting plate that supports the outer tube, a body plate, and an intermediate tube supporting plate that supports the intermediate tube. Since the reformed gas manifold discharged from the inner pipe and the bellows connecting the inner pipe and the inner pipe supporting plate are provided, even if a temperature difference occurs between the inner pipe and the outer pipe, the bellows absorbs the thermal expansion difference. Therefore, it is possible to reduce the stress generated in the reforming reaction tube and the manifold, and it is possible to extend the life of the reforming apparatus and expand the range of operating conditions.

According to the reforming apparatus of the second aspect of the present invention, a combustion apparatus for generating high temperature combustion gas by burning fuel and air, a reforming furnace for forming the combustion gas space, An inner pipe in which combustion gas flows inside, an outer pipe concentrically arranged outside the inner pipe, and an intermediate pipe concentrically arranged between the inner pipe and the outer pipe, A first annular portion formed between the inner pipe and the intermediate pipe, into which a source gas is introduced, a catalyst layer formed by filling the first annular portion with a catalyst, the intermediate pipe, and the A second annular portion formed between the inner tube and the outer tube, the second annular portion being formed between the inner tube and the outer tube, through which the reformed gas generated by flowing the raw material gas through the catalyst layer flows. The catalyst layer is disposed at one end on the opposite side and connects the first annular portion and the second annular portion to each other. A reforming reaction tube composed of an end cap for allowing the discharged reformed gas to flow into the second annular portion, an inner pipe supporting plate supporting the inner pipe, and a body plate, and the raw material gas A raw material gas manifold to be supplied to the annular portion of No. 1, an outer tube support plate that supports the outer tube,
A reformed gas manifold including a body plate and an intermediate pipe support plate that supports the intermediate pipe, and discharges the reformed gas from the second annular portion, and a bellows that connects the outer pipe and the outer pipe support plate. In addition to the effect of the first invention, since
This has the effect of improving the reliability of the bellows.

According to the reforming apparatus of the third aspect of the present invention, a combustion apparatus for generating high temperature combustion gas by burning fuel and air, a reforming furnace for forming the combustion gas space, and the above An inner pipe in which combustion gas flows inside, an outer pipe concentrically arranged outside the inner pipe, and an intermediate pipe concentrically arranged between the inner pipe and the outer pipe, A first annular portion formed between the inner pipe and the intermediate pipe, into which a source gas is introduced, a catalyst layer formed by filling the first annular portion with a catalyst, the intermediate pipe, and the A second annular portion formed between the inner tube and the outer tube, the second annular portion being formed between the inner tube and the outer tube, through which the reformed gas generated by flowing the raw material gas through the catalyst layer flows. The catalyst layer is disposed at one end on the opposite side and connects the first annular portion and the second annular portion to each other. A reforming reaction tube comprising an end cap having a single-layer or multi-layer structure of thin plates for allowing the reformed gas to be discharged to flow into the second annular portion, an inner tube supporting plate and a body plate supporting the inner tube. And a reformed gas comprising a source gas manifold for supplying the source gas to the first annular portion, an outer tube support plate for supporting the outer tube, a body plate, and an intermediate tube support plate for supporting the intermediate tube. Since the reforming gas manifold for discharging the reforming gas from the second annular portion is provided, even if a temperature difference occurs between the inner pipe and the outer pipe, the elastic end cap absorbs the difference in thermal expansion. As a result, it is possible to reduce the stress generated in the manifold and the manifold, extend the life of the reformer, and expand the range of operating conditions.

According to the reforming apparatus of the fourth aspect of the present invention, a combustion apparatus for generating high temperature combustion gas by burning fuel and air, a reforming furnace for forming the combustion gas space, the above An inner pipe in which combustion gas flows inside, an outer pipe concentrically arranged outside the inner pipe, and an intermediate pipe concentrically arranged between the inner pipe and the outer pipe, A first annular portion formed between the inner pipe and the intermediate pipe, into which a source gas is introduced, a catalyst layer formed by filling the first annular portion with a catalyst, the intermediate pipe, and the A second annular portion formed between the inner tube and the outer tube, the second annular portion being formed between the inner tube and the outer tube, through which the reformed gas generated by flowing the raw material gas through the catalyst layer flows. The catalyst layer is disposed at one end on the opposite side and connects the first annular portion and the second annular portion to each other. The reforming reaction tube including an end cap for allowing the reformed gas to flow out into the second annular portion, the inner tube elastic supporting plate of a thin plate supporting the inner tube, and the body plate To the first annular portion, a raw material gas manifold, an outer tube supporting plate for supporting the outer tube, a body plate, and an intermediate tube supporting plate for supporting the intermediate tube. Since the reforming gas manifold for discharging from the annular portion of 2 is provided, even if there is a temperature difference between the inner tube and the outer tube, the thermal expansion difference is absorbed by the inner tube elastic support plate. The effect that the stress generated in the manifold can be reduced, the life of the reformer can be extended, and the range of operating conditions can be expanded.

According to the reforming apparatus of the fifth aspect of the present invention, a combustion apparatus for generating high temperature combustion gas by burning fuel and air, a reforming furnace for forming the combustion gas space, the above An inner pipe in which combustion gas flows inside, an outer pipe concentrically arranged outside the inner pipe, and an intermediate pipe concentrically arranged between the inner pipe and the outer pipe, A first annular portion formed between the inner pipe and the intermediate pipe, into which a source gas is introduced, a catalyst layer formed by filling the first annular portion with a catalyst, the intermediate pipe, and the A second annular portion formed between the inner tube and the outer tube, the second annular portion being formed between the inner tube and the outer tube, through which the reformed gas generated by flowing the raw material gas through the catalyst layer flows. The catalyst layer is disposed at one end on the opposite side and connects the first annular portion and the second annular portion to each other. The reforming reaction tube including an end cap for allowing the reformed gas to flow out into the second annular portion, the inner tube elastic supporting plate of a thin plate supporting the inner tube, and the body plate The reformed gas, which comprises a raw material gas manifold for supplying to the first annular portion, a thin outer tube elastic support plate for supporting the outer tube, a body plate, and an intermediate tube support plate for supporting the intermediate tube. Since the reformed gas manifold that discharges the gas from the second annular portion is provided, even if a temperature difference occurs between the inner pipe and the outer pipe, the thermal expansion difference is generated by the inner pipe elastic support plate and the outer pipe elastic support plate. Because it is shared and absorbed,
The effect of being able to further absorb double the difference in thermal expansion as compared with the fourth aspect of the invention, and further extending the life and expanding the range of operating conditions are achieved.

According to the reforming apparatus of the sixth aspect of the present invention, a combustion apparatus for generating high temperature combustion gas by burning fuel and air, a reforming furnace for forming the combustion gas space, the above An inner pipe in which combustion gas flows inside, an outer pipe concentrically arranged outside the inner pipe, and an intermediate pipe concentrically arranged between the inner pipe and the outer pipe, A first annular portion formed between the inner pipe and the intermediate pipe, into which a source gas is introduced, a catalyst layer formed by filling the first annular portion with a catalyst, the intermediate pipe, and the A second annular portion formed between the inner tube and the outer tube, the second annular portion being formed between the inner tube and the outer tube, through which the reformed gas generated by flowing the raw material gas through the catalyst layer flows. The catalyst layer is disposed at one end on the opposite side and connects the first annular portion and the second annular portion to each other. An end cap for allowing the reformed gas to flow out into the second annular portion, and a high thermal conductive material provided between the inner pipe and the intermediate pipe and between the intermediate pipe and the outer pipe. A reforming reaction tube including a thermal anchor, a source gas manifold including an inner tube support plate supporting the inner tube and a body plate for supplying the source gas to the first annular portion, and an outer tube supporting the outer tube. Since the reformed gas manifold for discharging the reformed gas from the second annular portion, which includes the pipe support plate, the body plate, and the intermediate pipe support plate that supports the intermediate pipe, is provided, The temperature difference between the two can be reduced, the stress generated in the reforming reaction tube and the manifold can be reduced, and the life of the reforming device can be extended and the range of operating conditions can be expanded.

According to the seventh aspect of the present invention, there is provided a reforming device for producing a high-temperature combustion gas by burning fuel and air, a reforming furnace for forming the combustion gas space, and the above-mentioned reforming furnace. An inner pipe in which combustion gas flows inside, an outer pipe concentrically arranged outside the inner pipe, and an intermediate pipe concentrically arranged between the inner pipe and the outer pipe, A first annular portion formed between the inner pipe and the intermediate pipe, into which a source gas is introduced, a catalyst layer formed by filling the first annular portion with a catalyst, the intermediate pipe, and the A second annular portion formed between the inner tube and the outer tube, the second annular portion being formed between the inner tube and the outer tube, through which the reformed gas generated by flowing the raw material gas through the catalyst layer flows. The catalyst layer is disposed at one end on the opposite side and connects the first annular portion and the second annular portion to each other. A reforming reaction tube including an end cap for allowing the reformed gas to flow out into the second annular portion; an inner tube supporting plate supporting the inner tube; and a bellows body plate having a bellows. The source gas is the above first
Of the raw material gas to be supplied to the annular portion, an outer tube supporting plate that supports the outer tube, a body plate, and an intermediate tube supporting plate that supports the intermediate tube. Since the reformed gas manifold is discharged from the pipe, even if there is a temperature difference between the inner and outer tubes, the bellows absorbs the difference in thermal expansion, reducing the stress generated in the reforming reaction tube and manifold. In addition, it is possible to extend the life of the reformer and expand the range of operating conditions.

According to an eighth aspect of the present invention, there is provided a reformer for producing a high temperature combustion gas by burning a fuel and air, a reforming furnace for forming the combustion gas space, An inner pipe in which combustion gas flows inside, an outer pipe concentrically arranged outside the inner pipe, and an intermediate pipe concentrically arranged between the inner pipe and the outer pipe, A first annular portion formed between the inner pipe and the intermediate pipe, into which a source gas is introduced, a catalyst layer formed by filling the first annular portion with a catalyst, the intermediate pipe, and the A second annular portion formed between the inner tube and the outer tube, the second annular portion being formed between the inner tube and the outer tube, through which the reformed gas generated by flowing the raw material gas through the catalyst layer flows. The catalyst layer is disposed at one end on the opposite side and connects the first annular portion and the second annular portion to each other. A reforming reaction tube including an end cap for allowing the reformed gas to flow out into the second annular portion; an inner tube supporting plate supporting the inner tube; and a bellows body plate having a bellows. The source gas is the above first
, A raw material gas manifold to be supplied to the annular portion, an outer pipe supporting plate supporting the outer pipe, a bellows body plate having the bellows, and an intermediate pipe supporting plate supporting the intermediate pipe, and the reformed gas containing the reformed gas. Since the reformed gas manifold for discharging from the annular portion of 2 is provided, even if a temperature difference occurs between the inner pipe and the outer pipe, the difference in thermal expansion is absorbed by the two bellows. 2 more than the invention of 7
This has the effect of making it possible to further extend the life and expand the range of operating conditions, such as being able to absorb double the difference in thermal expansion.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a reformer showing a first embodiment.

FIG. 2 is a sectional view of a reformer showing a second embodiment.

FIG. 3 is a sectional view of a reformer showing a third embodiment.

FIG. 4 is a cross-sectional view of a reformer showing a fourth embodiment.

FIG. 5 is a cross-sectional view of a reformer showing a fifth embodiment.

FIG. 6 is a cross-sectional view of a reformer showing a sixth embodiment.

FIG. 7 is a cross-sectional view of a reformer showing a seventh embodiment.

FIG. 8 is a cross-sectional view of a reformer showing an eighth embodiment.

FIG. 9 is a cross-sectional view showing a conventional reformer.

[Explanation of symbols]

1 reforming furnace, 2 heat insulating material, 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, 7a fuel pipe, 7b air jet, 7c
Flame, 8 combustion space, 9 filler layer, 10 wire mesh, 11
Combustion gas manifold, 12 heat insulating material, 13 fuel inlet, 14 air inlet, 15 raw material gas inlet, 1
6 reformed gas outlet, 17 combustion gas outlet, 18 raw material gas manifold, 19 reformed gas manifold, 20 combustion tube, 21 inner tube support plate, 21a inner tube elastic support plate, 22 raw material gas manifold body plate, 23
Outer pipe support plate, 23a Outer pipe elastic support plate, 24 Reformed gas manifold body plate, 25 Intermediate pipe support plate, 26 Inner pipe bellows, 27 Outer pipe bellows, 28 Elastic end cap, 29 Thermal anchor, 29a Inner pipe-intermediate Pipe thermal anchors, 29b Intermediate pipe-outer pipe thermal anchors, 30 Raw material gas manifold body bellows,
31 Reformed gas manifold shell bellows.

Claims (8)

[Claims] 1. A combustion device for generating high-temperature combustion gas by burning fuel and air, a reforming furnace for forming the combustion gas space, and an inner pipe through which the combustion gas flows. An outer pipe concentrically arranged outside the inner pipe, an intermediate pipe concentrically arranged between the inner pipe and the outer pipe, and between the inner pipe and the intermediate pipe. A first annular portion which is formed and into which a raw material gas is introduced, a catalyst layer which is formed by filling the first annular portion with a catalyst, and the raw material gas which is formed between the intermediate tube and the outer tube Is provided at a second annular portion through which the reformed gas generated by flowing through the catalyst layer flows, and at one end of the inner pipe and the outer pipe opposite to the side where the raw material gas is introduced. The first annular portion and the second annular portion are communicated with each other, and the reformed gas flowing out from the catalyst layer is passed through the second annular portion. And a raw material gas manifold for supplying the raw material gas to the first annular portion, the reforming reaction tube having an end cap for flowing into the inner pipe, an inner pipe supporting plate for supporting the inner pipe, and a body plate. A reformed gas manifold for exhausting the reformed gas from the second annular portion, the reformed gas manifold comprising an outer pipe supporting plate for supporting the outer pipe, a body plate, and an intermediate pipe supporting plate for supporting the intermediate pipe, the inner pipe, and the above. A reformer comprising: a bellows that connects an inner pipe support plate; 2. A combustion device for generating high-temperature combustion gas by burning fuel and air, a reforming furnace for forming the combustion gas space, and an inner pipe through which the combustion gas flows. An outer pipe concentrically arranged outside the inner pipe, an intermediate pipe concentrically arranged between the inner pipe and the outer pipe, and between the inner pipe and the intermediate pipe. A first annular portion which is formed and into which a raw material gas is introduced, a catalyst layer which is formed by filling the first annular portion with a catalyst, and the raw material gas which is formed between the intermediate tube and the outer tube Is provided at a second annular portion through which the reformed gas generated by flowing through the catalyst layer flows, and at one end of the inner pipe and the outer pipe opposite to the side where the raw material gas is introduced. The first annular portion and the second annular portion are communicated with each other, and the reformed gas flowing out from the catalyst layer is passed through the second annular portion. A reforming reaction tube composed of an end cap for flowing into the inner tube, an inner tube supporting plate for supporting the inner tube and a body plate, and a source gas manifold for supplying the source gas to the first annular portion, A reformed gas manifold for discharging the reformed gas from the second annular portion, the outer pipe supporting plate supporting the outer pipe, a body plate, and an intermediate pipe supporting plate supporting the intermediate pipe; and the outer pipe. A reformer comprising: a bellows connecting the outer pipe support plate. 3. A combustion device that generates high-temperature combustion gas by burning fuel and air, a reforming furnace for forming the combustion gas space, and an inner pipe through which the combustion gas flows. An outer pipe concentrically arranged outside the inner pipe, an intermediate pipe concentrically arranged between the inner pipe and the outer pipe, and between the inner pipe and the intermediate pipe. A first annular portion which is formed and into which a raw material gas is introduced, a catalyst layer which is formed by filling the first annular portion with a catalyst, and the raw material gas which is formed between the intermediate tube and the outer tube Is provided at a second annular portion through which the reformed gas generated by flowing through the catalyst layer flows, and at one end of the inner pipe and the outer pipe opposite to the side where the raw material gas is introduced. The first annular portion and the second annular portion are communicated with each other, and the reformed gas flowing out from the catalyst layer is passed through the second annular portion. The reforming reaction tube comprising a thin plate end cap having a single-layer or multi-layer structure, and an inner tube supporting plate and a body plate for supporting the inner tube. And a source gas manifold for supplying the outer pipe, an outer pipe support plate for supporting the outer pipe, a body plate, and an intermediate pipe support plate for supporting the intermediate pipe. The reformed gas is discharged from the second annular portion. A reformer characterized by having a high-quality gas manifold. 4. A combustion device that generates high-temperature combustion gas by burning fuel and air, a reforming furnace for forming the combustion gas space, and an inner pipe through which the combustion gas flows. An outer pipe concentrically arranged outside the inner pipe, an intermediate pipe concentrically arranged between the inner pipe and the outer pipe, and between the inner pipe and the intermediate pipe. A first annular portion which is formed and into which a raw material gas is introduced, a catalyst layer which is formed by filling the first annular portion with a catalyst, and the raw material gas which is formed between the intermediate tube and the outer tube Is provided at a second annular portion through which the reformed gas generated by flowing through the catalyst layer flows, and at one end of the inner pipe and the outer pipe opposite to the side where the raw material gas is introduced. The first annular portion and the second annular portion are communicated with each other, and the reformed gas flowing out from the catalyst layer is passed through the second annular portion. A reforming reaction tube composed of an end cap for flowing into the inner tube, a thin inner tube elastic supporting plate supporting the inner tube, and a body plate, and the raw material gas for supplying the raw material gas to the first annular portion. And a reformed gas manifold for discharging the reformed gas from the second annular portion, which includes a manifold, an outer tube support plate that supports the outer tube, a body plate, and an intermediate tube support plate that supports the intermediate tube. A reformer characterized by being provided. 5. A combustion device that generates high-temperature combustion gas by burning fuel and air, a reforming furnace for forming the combustion gas space, and an inner pipe through which the combustion gas flows. An outer pipe concentrically arranged outside the inner pipe, an intermediate pipe concentrically arranged between the inner pipe and the outer pipe, and between the inner pipe and the intermediate pipe. A first annular portion which is formed and into which a raw material gas is introduced, a catalyst layer which is formed by filling the first annular portion with a catalyst, and the raw material gas which is formed between the intermediate tube and the outer tube Is provided at a second annular portion through which the reformed gas generated by flowing through the catalyst layer flows, and at one end of the inner pipe and the outer pipe opposite to the side where the raw material gas is introduced. The first annular portion and the second annular portion are communicated with each other, and the reformed gas flowing out from the catalyst layer is passed through the second annular portion. A reforming reaction tube composed of an end cap for flowing into the inner tube, a thin inner tube elastic supporting plate supporting the inner tube, and a body plate, and the raw material gas for supplying the raw material gas to the first annular portion. A reformed gas manifold comprising a manifold, a thin outer tube elastic support plate for supporting the outer tube, a body plate, and an intermediate tube support plate for supporting the intermediate tube, and discharging the reformed gas from the second annular portion. A reforming device comprising: 6. A combustion device for generating high-temperature combustion gas by burning fuel and air, a reforming furnace for forming the combustion gas space, and an inner pipe through which the combustion gas flows. An outer pipe concentrically arranged outside the inner pipe, an intermediate pipe concentrically arranged between the inner pipe and the outer pipe, and between the inner pipe and the intermediate pipe. A first annular portion which is formed and into which a raw material gas is introduced, a catalyst layer which is formed by filling the first annular portion with a catalyst, and the raw material gas which is formed between the intermediate tube and the outer tube Is provided at a second annular portion through which the reformed gas generated by flowing through the catalyst layer flows, and at one end of the inner pipe and the outer pipe opposite to the side where the raw material gas is introduced. The first annular portion and the second annular portion are communicated with each other, and the reformed gas flowing out from the catalyst layer is passed through the second annular portion. An end cap for flowing into the reforming reaction tube made of a thermal anchor of the high thermal conductivity material provided on and between the said intermediate tube and said outer tube between the inner tube and the intermediate tube,
A raw material gas manifold comprising an inner pipe supporting plate for supporting the inner pipe and a body plate for supplying the raw material gas to the first annular portion, and an outer pipe supporting plate for supporting the outer pipe, a body plate, and the intermediate portion. A reforming gas manifold comprising: an intermediate pipe supporting plate that supports a pipe; and a reforming gas manifold that discharges the reforming gas from the second annular portion. 7. A combustion device that generates high-temperature combustion gas by burning fuel and air, a reforming furnace for forming the combustion gas space, and an inner pipe through which the combustion gas flows. An outer pipe concentrically arranged outside the inner pipe, an intermediate pipe concentrically arranged between the inner pipe and the outer pipe, and between the inner pipe and the intermediate pipe. A first annular portion which is formed and into which a raw material gas is introduced, a catalyst layer which is formed by filling the first annular portion with a catalyst, and the raw material gas which is formed between the intermediate tube and the outer tube Is provided at a second annular portion through which the reformed gas generated by flowing through the catalyst layer flows, and at one end of the inner pipe and the outer pipe opposite to the side where the raw material gas is introduced. The first annular portion and the second annular portion are communicated with each other, and the reformed gas flowing out from the catalyst layer is passed through the second annular portion. A reforming reaction tube consisting of an end cap for flowing into the inner tube, an inner tube supporting plate supporting the inner tube, and a bellows body plate having a bellows, and supplying the raw material gas to the first annular portion. A raw material gas manifold, and a reformed gas manifold which comprises an outer tube support plate for supporting the outer tube, a body plate, and an intermediate tube support plate for supporting the intermediate tube, and which discharges the reformed gas from the second annular portion. A reforming device comprising: 8. A combustion device for generating high temperature combustion gas by burning fuel and air, a reforming furnace for forming the combustion gas space, and an inner pipe through which the combustion gas flows. An outer pipe concentrically arranged outside the inner pipe, an intermediate pipe concentrically arranged between the inner pipe and the outer pipe, and between the inner pipe and the intermediate pipe. A first annular portion which is formed and into which a raw material gas is introduced, a catalyst layer which is formed by filling the first annular portion with a catalyst, and the raw material gas which is formed between the intermediate tube and the outer tube Is provided at a second annular portion through which the reformed gas generated by flowing through the catalyst layer flows, and at one end of the inner pipe and the outer pipe opposite to the side where the raw material gas is introduced. The first annular portion and the second annular portion are communicated with each other, and the reformed gas flowing out from the catalyst layer is passed through the second annular portion. A reforming reaction tube consisting of an end cap for flowing into the inner tube, an inner tube supporting plate supporting the inner tube, and a bellows body plate having a bellows, and supplying the raw material gas to the first annular portion. The raw gas manifold, an outer pipe support plate that supports the outer pipe, a bellows body plate having the bellows, and an intermediate pipe support plate that supports the intermediate pipe, and the reformed gas is discharged from the second annular portion. A reforming apparatus comprising: a reformed gas manifold.