JP4163657B2 - Fuel reformer - Google Patents

Description

  The present invention relates to a fuel reforming apparatus, and more particularly to an improvement of an apparatus for producing a reformed gas containing hydrogen from a raw material gas such as methanol or hydrocarbon in order to supply fuel to a fuel cell.

In the reforming reaction of the raw material gas, it is advantageous to increase the reaction temperature in order to improve the generation efficiency of the reformed gas. Therefore, it is necessary to make the heat insulating structure for the reformer solid. The present applicant has previously developed a reformer in which an inner case is covered with an outer case and a space for heat insulation is formed between the two cases (see Patent Document 1).
JP 2000-63103 A

  When the reaction temperature is increased, the amount of heat release increases accordingly. In order to keep the reaction temperature economically high, it is required to keep the heat dissipation low, but in the case of the adiabatic space, the heat insulation effect is naturally limited, so that the above requirement can be sufficiently met. However, this point improvement was desired.

  The present invention provides the fuel reformer that can maintain a high reaction temperature economically to obtain a high hydrogen generation efficiency when the reaction temperature is increased, and can be downsized. The purpose is to do.

To achieve the above object, the invention of claim 1, and a reformer for generating a reformed gas containing hydrogen from a raw material gas, to diffuse the reformer inlet side provided continuously to the raw material gas the A gas introduction member that leads to the reformer; a heat exchanger that is connected to the outlet side of the reformer and that heats the source gas with the high-temperature reformed gas; and the heat exchanger that is heated by the heat exchanger A gas surrounding the reformer and the gas introduction member so as to form a gas passage for introducing the raw material gas around the reformer and the gas introduction member and then leading to at least one gas introduction port of the gas introduction member. a fuel reformer device in which possess a passage forming member, said gas passage forming member, to form an inlet side of the gas passage in the housing around the heat exchanger, also a part of the housing The entire circumference of the heat exchanger is surrounded by A part of the ging includes a plurality of source gas outlets arranged over the entire circumference and communicating with the inlet side of the gas passage. The invention of claim 2 is characterized in that hydrogen is supplied from the source gas. A reformer that generates reformed gas, a gas introduction member that is connected to the inlet side of the reformer and diffuses the raw material gas and leads to the reformer, and is connected to the outlet side of the reformer And a heat exchanger that heats the source gas with the high-temperature reformed gas, and the gas after the source gas heated by the heat exchanger flows around the reformer and the gas introduction member A fuel reformer comprising the reformer and a gas passage forming member surrounding the gas introduction member to form a gas passage leading to at least one gas introduction port of the introduction member, wherein the heat exchange The container has a cylindrical housing and an inner periphery of the housing. A pair of holding plates that are fixed to each other to form a heat exchange chamber, a partition plate that divides the heat exchange chamber into a plurality of small chambers to form a zigzag passage, the holding plates, the small chambers, and A plurality of gas pipes that pass through the partition plate and are spaced apart from each other, each gas pipe having one end communicating with the outlet of the reformer and the other end communicating with the reformed gas outlet of the housing. And the housing has a raw material gas inlet communicating with an upstream portion of the zigzag passage composed of the plurality of small chambers, and a raw gas for communicating a downstream portion of the zigzag passage with the inlet side of the gas passage. And an outlet .

According to the features of the first and second aspects of the invention, when the raw material gas heated by the high-temperature reformed gas is caused to flow around the reformer, heat transfer from the reformer to the raw material gas is sufficiently suppressed. As a result, the heat dissipation of the reformer is greatly reduced. Thereby, when the reaction temperature of the reforming reaction is increased, the reaction temperature can be maintained economically high. In other words, cost reduction measures have been taken, such as reducing the amount of combustion gas for maintaining the reaction temperature as the amount of heat released decreases, and effectively utilizing the waste heat of the high-temperature reformed gas for heating the raw material gas. It is. Therefore, it is possible to perform the reforming reaction at a high temperature with a high reaction rate to greatly increase the hydrogen generation efficiency.

  In addition, when the heat release amount of the reformer is suppressed, the temperature inside the reformer becomes uniform throughout the whole, so that it is easy to control the gas temperature and the catalyst temperature, and some catalysts are overheated and deteriorated. Thus, the durability of the catalyst can be improved. Further, when a gas introduction member and a heat exchanger are connected to the inlet side and the outlet side of the reformer, respectively, a connecting pipe between the reformer, the gas introduction member and the heat exchanger is not required, and the apparatus can be made compact. In addition, it is possible to avoid problems such as heat dissipation from the connecting pipe.

In particular, according to the feature of the invention of claim 1, the gas passage forming member surrounds a part of the housing over the entire circumference so as to form the inlet side of the gas passage around the housing of the heat exchanger. In addition, a part of the housing of the heat exchanger is characterized in that there are a plurality of raw material gas outlets arranged over the entire circumference and communicating with the inlet side of the gas passage. In addition, it is possible to uniformly feed the raw material gas from the heat exchanger to the inlet side of the gas passage over the entire gas passage, thereby forming a uniform flow of the raw material gas in the gas passage. Can be evenly suppressed over the whole.

According to a third aspect of the present invention, in addition to the feature of the first or second aspect, the gas passage is provided with at least one aeration member for diffusing the raw material gas passing through the gas passage. With this configuration, in addition to the above-described effects, the heated source gas is uniformly introduced into the gas introduction member from the gas introduction port so that the source gas is diffused smoothly by the gas introduction member. And it is possible to perform it reliably.

In addition to the above-described features of any of claims 1 to 3 , the invention of claim 4 is characterized in that the gas introduction member, the reformer, the heat exchanger, and the gas passage forming member are each cylindrical. These four members are arranged coaxially, and if constituted in this way, it is possible to further promote downsizing of the apparatus in addition to the above-described effects.

In addition to the above feature of any one of claims 1 to 4 , the invention of claim 5 is characterized in that the heat exchanger, the reformer, and the gas introduction member are arranged vertically in this order from below. In this way, in addition to the above-described effects, the apparatus can be reduced in size while reducing the installation area as much as possible while reducing the size of the apparatus. there is no need to Torimawasu upward gas pipe exit side of the reformed gas can minimize deployed in low position, piping that easily and Do.

  Further, the invention of claim 6 is characterized in that, in addition to the feature of any one of claims 1 to 5, the entire outer surface of the gas passage forming member is covered with a heat insulating member. It is possible to further reduce the heat radiation amount of the reformer.

  The invention of claim 7 is characterized in that, in addition to the feature of any one of claims 1 to 6, the gas introduction member is a diffuser. Due to the constriction and expansion action of the continuous diffuser itself on the raw material gas, the raw material gas directed to the reformer can be effectively diffused and led to the reformer substantially uniformly.

  According to an eighth aspect of the present invention, in addition to the above feature of any of the first to seventh aspects, the gas introduction member has a large number of small holes through which the source gas introduced into the gas introduction member passes. And at least one of a diffuser member for diffusing the raw material gas, a screw-type guide member for rotating the raw material gas, and a cone-shaped blowing member for substantially uniformly guiding the raw material gas to the downstream side while expanding the raw material gas. With this configuration, in the gas introduction member, the raw material gas directed to the reformer is fed into the gas introduction member by at least one of the diffuser member, screw-type guide member, and cone-type blowing member. It can be diffused more effectively and led to the reformer substantially evenly.

According to the present invention, since the raw material gas heated by the high-temperature reformed gas is allowed to flow around the reformer, when the reaction temperature is increased, the reaction temperature is economically maintained high and high. Hydrogen generation efficiency can be obtained, and since the gas introduction member and the heat exchanger are connected to the inlet side and the outlet side of the reformer, respectively, between the reformer and the gas introduction member / heat exchanger. that Ki de be made to reduce the size of the apparatus eliminates the need for connection pipes.

In particular, according to the first aspect of the present invention, it is possible to uniformly feed the raw material gas from the heat exchanger to the inlet side of the gas passage throughout the gas passage, thereby forming a uniform flow of the raw material gas in the gas passage. With this, the heat radiation of the reformer can be evenly suppressed over the whole.

In particular, according to the invention of claim 3 , since the heated source gas can be uniformly introduced into the gas introduction member from the gas introduction port, the diffuse operation of the source gas by the gas introduction member can be smoothly and reliably performed. Can be performed.

In particular, according to the invention of claim 4 , the gas introduction member, the reformer, the heat exchanger, and the gas passage forming member each have a cylindrical shape, and these four members are coaxially arranged, so that the apparatus can be downsized. Can be further promoted.

In particular, according to the invention of claim 5 , since the heat exchanger, the reformer, and the gas introduction member are arranged vertically in this order from the bottom to form an integral structure with each other, the apparatus can be reduced in size. the can be reduced as much as possible the installation area as Vertical mode, yet the outlet side of the inlet side and the reformed gas of the material gas can minimize deployed in low position of the gas pipe is not necessary to Torimawasu upward, piping that easily and Do.

  In particular, according to the invention of claim 6, since the entire outer surface of the gas passage forming member is covered with the heat insulating member, it is possible to further reduce the heat radiation amount of the reformer.

  In particular, according to the invention of claim 7, the raw material gas directed to the reformer is effectively diffused by the throttling / expansion action of the diffuser itself connected to the inlet side of the reformer with respect to the raw material gas. Can be led almost evenly.

  In particular, according to the invention of claim 8, in the gas introduction member, the raw material gas directed to the reformer is further increased in the gas introduction member by at least one of a diffuser member, a screw-type guide member, and a cone-type blowing member. It can be diffused effectively and guided to the reformer substantially evenly.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below based on examples of the present invention illustrated in the accompanying drawings.

[First embodiment]
The fuel reformer 1 shown in FIGS. 1 to 3 is configured to apply a partial oxidation method as a hydrogen production method. The fuel reformer 1 is provided with a cylindrical reformer 2 that generates a reformed gas containing hydrogen from a raw material gas, and an inlet 3 side, that is, an upper side of the reformer 2, and reforms the raw material gas. A cylindrical diffuser 4 for raw material gas as a gas introduction member leading to the reactor 2 and a cylindrical heat that is connected to the outlet 5 side of the reformer 2, that is, on the lower side, and heats the raw material gas with a high-temperature reformed gas. In order to form a gas passage 8 that leads to the gas inlet 7 existing at the upper end of the exchanger 6 and the diffuser 4 after flowing the heated raw material gas around the reformer 2 and the diffuser 4, And a cylindrical gas passage forming member 9 surrounding the diffuser 4. These four members 2, 4, 6, and 9 are arranged on the same axis, which is effective for reducing the size of the apparatus 1. In particular, the heat exchanger 6, the reformer 2, and the diffuser 4 (gas introduction member) are vertically arranged in this order from the bottom and are integrated with each other, so that the device 1 can be reduced in size while reducing the size of the device 1. As a vertically long form, the installation area can be reduced as much as possible, and the inlet side of the raw material gas and the outlet side of the reformed gas in the apparatus 1 can be arranged as low as possible, so that it is not necessary to route the gas pipe upward, and the pipe becomes easy. .

  The reformer 2 has an inlet 3 surrounded by an annular end surface on the upper side, a cylindrical outer cylinder 10 having an outlet 5 surrounded by an annular end surface on the lower side, and an outside between these inlets and outlets 3 and 5. And an inner cylinder 11 fixed in the cylinder 10. In the inner cylinder 11, a catalyst 16 such as a Pt-based, CuZn-based, or Pd-based material is used to perform a partial oxidation method using a raw material gas, for example, a gas containing hydrocarbons such as methanol and methane, and oxygen (air). A plurality of inflow holes 14 and outflow holes 15 are formed in the upper and lower end walls 12 and 13 of the inner cylinder 11, respectively. The catalyst 16 is held on a honeycomb-shaped carrier made of a heat-resistant metal material or a ceramic material as necessary.

  The diffuser 4 has a neck portion 17 having a single gas introduction port 7, a shoulder portion 18 that continues to the lower side of the neck portion 17, a shoulder portion 18, and a lower end that abuts against the outer cylinder 10 of the reformer 2. And a barrel 19 attached thereto.

  The heat exchanger 6 includes a cylindrical housing 22 having an inlet 20 surrounded by an annular end surface on the upper side and an outlet 21 surrounded by an annular end surface on the lower side, and a housing 22 in the vicinity of the inlet and outlet 20 and 21. The two circular holding plates 24 and 25 that are fixed to the inner peripheral surface of each of the two holding plates 24 and 25 to form the heat exchanging chamber 23, and the two holding plates 24 and 25 are distributed evenly and entirely through them. A plurality of gas pipes 26 which are fixed. In the vicinity of the lower holding plate 25, a connection pipe 28 having a raw material gas inlet 27 is provided in the housing 22 so as to communicate with the heat exchange chamber 23.

In the heat exchange chamber 23, there are arranged three partition plates 33 to 35 that divide the interior into four small chambers 29 to 32 that are lined up in the vertical direction and communicate with each other. 35, a part of the plurality of gas pipes 26 penetrates. As clearly shown in FIG. 3, each of the partition plates 33 to 35 has a shape obtained by cutting a part of a circular plate into a crescent shape, and its arc-shaped outer peripheral portion 36 is fixed to the inner peripheral surface of the housing 22, and its string by Jo portion 37 and the passage 38 to 40 formed by a part of the housing 22 peripheral surface, up, down two small chambers 29 and 30; the zigzag passage and communicating with between 31 and 32; 30, 31 It comes to form .

  In order to perform heat exchange efficiently, the lower passage 40 is located farthest from the raw material gas inlet 27, the intermediate passage 39 is located above the raw material gas inlet 27, and the upper passage 38 is located on the lower side. Above the passage 40.

The raw material gas inlet 27 communicates with the upstream portion of the zigzag passage formed of the small chambers 29 to 32. The source gas outlet 41 communicates with the downstream portion of the zigzag passage composed of the small chambers 29 to 32 , and is located farthest from the upper passage 38, that is, above the source gas inlet 27. A housing 22 is formed. The lower part of the cylindrical gas passage forming member 9 surrounds a part of the housing 22 of the heat exchanger 6, that is, the upper part over the entire circumference, and the lower end portion of the member 9 is below the outlet 41 and the housing 22. It is fixed to the outer peripheral surface. Thereby, the outlet 41 communicates with the inlet side of the gas passage 8. Note that a plurality of source gas outlets 41 may be provided on the outer periphery of the housing 22 at intervals in the circumferential direction.

  Annular diffusers 42 and 43 are sandwiched between the inner peripheral surface of the gas passage forming member 9 and the outer peripheral surface of the body 19 of the diffuser 4 and the outer peripheral surface of the outer cylinder 10 of the reformer 2. These air diffusers 42 and 43 have a plurality of small holes 44 dispersed in the circumferential direction. The diffuser members 42 and 43 are made of one or a combination of two or more selected from a punching metal, a sintered metal body, a foam metal body and the like.

  Next, the operation of the fuel reformer 1 will be described.

  First, the temperature of the catalyst 16 and the diffuser are caused by flowing combustion gas of methanol and air through the heat exchange chamber 23 of the heat exchanger 6, the gas passage 8, the diffuser 4, the reformer 2, and the gas pipes 26 of the heat exchanger 6. 4 and the temperature of the heat exchanger 6 are raised. When the temperature of the catalyst 16 rises to a temperature sufficient to cause partial oxidation reaction of the raw material gas composed of methanol and air, for example, 350 ° C., the flow of the combustion gas is stopped, and then the raw material gas is transferred to the heat exchange chamber 23 and the gas passage 8. And the diffuser 4 is introduced and introduced into the reformer 2. In the reformer 2, a part of the raw material gas is combusted by an oxidation reaction in the presence of the catalyst, and the reforming reaction of the raw material gas is caused by the combustion heat to generate a reformed gas containing hydrogen. The reformed gas at about 300 to 350 ° C. is led out from the reformer 2 after flowing through the gas pipes 26 of the heat exchanger 6.

  The raw material gas introduced into the heat exchange chamber 23 from the inlet 27 of the heat exchanger 6 is heated by the high-temperature reformed gas through the gas pipes 26 while sequentially flowing through the four small chambers 32, 31, 30 and 29. The heated raw material gas is flowed around the reformer 2. As a result, heat transfer from the reformer 2 to the raw material gas is sufficiently suppressed, and the amount of heat released from the reformer 2 is greatly reduced. Therefore, when the reaction temperature of the reforming reaction is increased, the reaction temperature is reduced. Can be kept high economically. In other words, cost reduction measures have been taken, such as reducing the amount of combustion gas for maintaining the reaction temperature as the amount of heat released decreases, and effectively utilizing the waste heat of the high-temperature reformed gas for heating the raw material gas. It is. Therefore, it is possible to perform the reforming reaction at a high temperature with a high reaction rate to greatly increase the hydrogen generation efficiency.

  Further, if the heat release amount of the reformer 2 is suppressed, the temperature inside the reformer 2 becomes uniform over the whole, so that control of the gas temperature and catalyst temperature is easy and a part of the catalyst 16 is overheated. Problems such as deterioration can be prevented.

  Further, if the diffuser 4 and the heat exchanger 6 are respectively connected to the inlet 3 side and the outlet 5 side of the reformer 2, the connection pipe between the reformer 2, the diffuser 4 and the heat exchanger 6 becomes unnecessary. Therefore, it is possible to reduce the size of the apparatus and avoid problems such as heat dissipation from the connecting pipe.

  Further, when at least one, in the embodiment, two diffuser members 42 and 43 are provided in the gas passage 8, the heated source gas is uniformly introduced into the diffuser 4 from the gas inlet 7, and the source by the diffuser 4 is introduced. The gas diffusing action can be performed smoothly and reliably.

[Second Embodiment]
In the fuel reformer 1 shown in FIG. 4, a disk-shaped air diffuser 45 made of punching metal or the like is disposed in the body portion 19 of the diffuser 4 so as to face the inlet 3 of the reformer 2. Is. Other configurations are the same as those of the first embodiment (see FIG. 2).

  With such a configuration, the raw material gas is made to flow almost uniformly throughout the inlet 3 of the reformer 2 by the large number of small holes 46 of the diffuser member 45, and the entire catalyst 16 is effectively made effective. Utilization can improve the production efficiency of hydrogen.

[Third embodiment]
In the fuel reforming apparatus 1 shown in FIG. 5, a screw-type guide member 47 that turns the raw material gas is disposed in the neck portion 17 of the diffuser 4. Other configurations are the same as those of the second embodiment (see FIG. 4).

  If comprised in this way, it will become possible to disperse | distribute the raw material gas in the trunk | drum 19 while turning with the screw-shaped guide member 47, and to flow in into the disk-shaped diffuser member 45 substantially uniformly after that, by this, 2nd The effects of the embodiment can be further improved.

[Fourth embodiment]
In the fuel reformer 1 shown in FIG. 6, a cone-shaped blowing member 50 having inner and outer double passages 48 and 49 is disposed in the neck portion 17 of the diffuser 4, and the passage is also provided on the outer periphery of the member 50. 51 is formed. Other configurations are the same as those of the second embodiment (see FIG. 4).

  If comprised in this way, source gas will be disperse | distributed in the trunk | drum 19 through the channel | path 51 of the outer periphery of the cone-shaped blowing member 50, and both the channel | paths 48 and 49 inside it, and it will be substantially equal to the disk shaped air diffusion member 45 after that. It becomes possible to flow in, and this can further improve the effect of the second embodiment.

[Fifth embodiment]
In the fuel reformer 1 shown in FIG. 7, the neck 17 of the diffuser 4 is made thinner than that of the second embodiment (see FIG. 4), and the gas inlet is closed by a lid 52. A plurality of small-diameter gas inlets 7 are formed in 18 respectively. Other configurations are the same as those of the second embodiment (see FIG. 4).

  If comprised in this way, it will become possible to disperse | distribute and introduce raw material gas in the trunk | drum 19 through the some small diameter gas inlet 7, and then it will flow into the disk-shaped diffuser member 45 substantially uniformly, The effect of the second embodiment can be further improved.

[Sixth embodiment]
The fuel reformer 1 shown in FIG. 8 has a heat insulating member 53 covering the entire outer surface of the gas passage forming member 9 in the third embodiment of FIG. In the illustrated example, the heat insulating member 53 has an outer shell 55 that forms a sealed space 54 between the gas passage forming member 11 and the sealed space 54 is in a vacuum state. The sealed space 54 may contain a gas having a lower thermal conductivity than air, such as argon gas. Other configurations are the same as those of the second embodiment (see FIG. 4).

  If comprised in this way, it is possible to further reduce the heat dissipation of the reformer 2. FIG.

[Seventh embodiment]
In the fuel reformer 1 shown in FIGS. 9 and 10, the gas passage forming member 9 forms the inlet side of the gas passage 8 around the housing 22 of the heat exchanger 6 as in the first embodiment. Therefore, a part of the housing 22, that is, the upper part is surrounded over the entire circumference, and the part of the housing 22 of the heat exchanger 6 is arranged at substantially equal intervals over the whole circumference to provide the gas passage 8. There are a plurality of source gas outlets 41 communicating with the inlet side. Other configurations are the same as those of the first embodiment.

  If comprised in this way, source gas will be uniformly sent over the whole to the inlet side of the gas channel 8 from the heat exchanger 6, and the uniform flow of source gas will be formed in the gas channel 8, and, thereby, reformer The heat radiation of 2 can be evenly suppressed over the whole.

[Eighth embodiment]
The fuel reformer 1 shown in FIG. 11 is configured to apply a steam reforming method as a hydrogen production method, and includes a heating pipe 56 for heating the catalyst 16. The heating pipe 56 includes an outer pipe 57 and an inner pipe 58, and the outer pipe 57 is bent near the outer surface of the ceiling wall 59 of the gas passage forming member 9, and passes through the ceiling wall 59 and the gas inlet 7 of the diffuser 4. The bottom wall 60 is positioned at the outlet 5 of the reformer 2 through the inside and the inner cylinder 11 of the reformer 2. On the other hand, the inner pipe 58 extends through the bent portion of the outer pipe 57 and the outlet 61 is positioned in the vicinity of the inner surface of the bottom wall 60. Other configurations are the same as those of the seventh embodiment (see FIG. 9).

  In this case, the source gas is made of, for example, methanol and water vapor, and the catalyst 16 is made of, for example, a Pt-based catalyst, a CuZn-based catalyst, a Pd-based catalyst, or the like. High-temperature gas such as exhaust gas and combustion gas is supplied to the inner pipe 58 of the heating pipe 56, and the gas is inside the inner pipe 58, its outlet 61, between the outer peripheral surface of the inner pipe 58 and the outer peripheral surface of the outer pipe 57, and in the outer pipe 57. Are sequentially discharged to the outside.

  In the fuel reformer 1 that supplies fuel to a fuel cell having an output of several tens of kW, the radial width of the gas passage 8 around the reformer 2 is set to 10 mm or less. The same applies to the distance between the gas passage forming member 9 and the outer shell 55.

[Ninth embodiment]
In the fuel reformer 1 shown in FIG. 12, instead of the diffuser 4 shown in the first embodiment (see FIG. 2) as a gas introduction member, a cylindrical guide cylinder 4 ′ having a uniform cross section and open both ends. Is used. The lower open end of the guide tube 4 ′ is integrally connected to the inlet 3 side, that is, the upper side of the reformer 2, and the open upper end of the guide tube 4 ′ forms a gas inlet 7. Further, on the inner surface of the guide cylinder 4 ', at least one (a pair of upper and lower in the illustrated example) disc-shaped air diffuser made of punching metal or the like so as to face the inlet 3 of the reformer 2. 45 is disposed and fixed. Further, in the first to eighth embodiments, an annular diffuser is provided between the inner peripheral surface of the gas passage forming member 9 and the outer peripheral surface of the body 19 of the diffuser 4 and the outer peripheral surface of the outer cylinder 10 of the reformer 2. The members 42 and 43 are sandwiched, but such an annular diffuser member is omitted in the ninth embodiment. Other configurations are the same as those of the first embodiment (see FIG. 2).

  Thus, in this ninth embodiment, the gas introducing member is not a diffuser but is constituted by a cylindrical guide cylinder 4 ′. The raw material gas introduced into the guide cylinder 4 ′ is a large number of diffuser members 45. By the aeration action by the small holes 46, it flows into the inlet 3 of the reformer 2 while being distributed almost evenly throughout, and the hydrogen generation efficiency can be improved by effectively using the entire catalyst 16. it can. In the ninth embodiment, the gas introducing member is not a diffuser but a simple cylindrical guide tube 4 '. Therefore, the structure is simple, the manufacturing is easy, and the cost is reduced. Moreover, in the ninth embodiment, the annular diffuser members 42 and 43 are omitted, so that the configuration is simpler and the manufacture is easier.

  In each of the above embodiments, the outer diameters of the plurality of gas pipes 26 passing through the holding plates 24 and 25 and the partition plates 33 to 35 in the heat exchanger 6 are relatively small (that is, equal to or smaller than the arrangement pitch of the gas pipes 26). In the present invention, as shown in FIG. 13, the gas pipe 26 having a relatively large outer diameter (that is, larger than the arrangement pitch of the gas pipes 26) may be used. In this case, the arrangement pitch of the adjacent two rows of gas pipes 26 is shifted by a half pitch as shown in FIG. 13B, rather than the case of the square arrangement in which the arrangement pitches of the rows of gas pipes 26 are aligned as shown in FIG. In the case of the arrangement, the heat transfer area can be increased by increasing the number of pipes per unit area. This makes it possible to reduce the size of the heat exchanger 6 and is advantageous in shortening each gas pipe 26. It becomes.

It is a front view of 1st Example. FIG. 2 is a sectional view taken along line 2-2 of FIG. FIG. 3 is a sectional view taken along line 3-3 in FIG. 2. It is sectional drawing of 2nd Example, and respond | corresponds to FIG. It is sectional drawing of 3rd Example, and respond | corresponds to FIG. It is sectional drawing of 4th Example and respond | corresponds to FIG. It is sectional drawing of 5th Example, and respond | corresponds to FIG. It is sectional drawing of 6th Example and respond | corresponds to FIG. It is sectional drawing of 7th Example, and respond | corresponds to FIG. FIG. 10 is a sectional view taken along line 10-10 in FIG. 9 and corresponds to FIG. It is sectional drawing of 8th Example and respond | corresponds to FIG. It is sectional drawing of 9th Example and respond | corresponds to FIG. It is sectional drawing which shows the modification of a heat exchanger, and respond | corresponds to FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ......... Fuel reformer 2 ......... Reformer 3 ......... Inlet 4 ......... Diffuser 4 'as gas introduction member ... Cylindrical guide cylinder 5 as gas introduction member ... ……… Exit 6 ………… Heat exchanger 7 ………… Gas inlet 8 ………… Gas passage 9 ………… Gas passage forming member
21 .... Reform gas outlet 22 .... Housing
23 ……… Heat Exchange Room
24, 25 ... Holding plate
26 ... Gas pipe
27 ……… Inlet for raw material gas
29-32 ... Small room
33-35 ... Partition plate
41 ......... Material gas outlet 42 ......... Air diffuser member 43 ......... Air diffuser member 45 ......... Air diffuser member 46 ......... Small hole 47 ......... Screw guide member 50 ......... Cone-shaped outlet Element

Claims (8)

Reformer for generating a reformed gas containing hydrogen from a raw material gas (2) and its reformer (2) of the inlet (3) by diffusing consecutively by raw material gas side reformer (2 ) And a heat exchanger (4) connected to the outlet (5) side of the reformer (2) and heating the raw material gas with the high-temperature reformed gas ( 6), and after the raw material gas heated by the heat exchanger (6) flows around the reformer (2) and the gas introduction member (4, 4 '), the gas introduction member (4, 4) 4 ') gas passage forming member (8) surrounding the reformer (2) and the gas introduction member (4, 4') to form a gas passage (8) leading to at least one gas inlet (7). 9) and a Yes to the fuel reformer device in which a,
The gas passage forming member (9) has a part of the housing (22) partially formed so as to form an inlet side of the gas passage (8) around the housing (22) of the heat exchanger (6). For a plurality of source gases that surround the circumference and are arranged over the entire circumference of a part of the housing (22) of the heat exchanger (6) and communicate with the inlet side of the gas passage (8). A fuel reformer having an outlet (41) . A reformer (2) for generating a reformed gas containing hydrogen from the source gas, and the reformer (2) connected to the inlet (3) side of the reformer (2) to diffuse the source gas And a heat exchanger (6) connected to the outlet (5) side of the reformer (2) and heating the raw material gas with the high-temperature reformed gas. ) And the raw material gas heated by the heat exchanger (6) flow around the reformer (2) and the gas introduction member (4, 4 '), and then the gas introduction member (4, 4). A gas passage forming member (9) surrounding the reformer (2) and the gas introduction member (4, 4 ') to form a gas passage (8) leading to at least one gas inlet (7) of') And a fuel reformer comprising:
The heat exchanger (6) includes a cylindrical housing (22) and a pair of holding plates (24) fixed to the inner peripheral surface of the housing (22) to form a heat exchange chamber (23) therebetween. , 25), partition plates (33-35) that divide the inside of the heat exchange chamber (23) into a plurality of small chambers (29-32) to form a zigzag passage, and the holding plates (24, 25) A plurality of gas pipes (26) penetrating through the small chambers (29-32) and the partition plates (33-35) and arranged at intervals from each other,
Each gas pipe (26) has one end communicating with the outlet (5) of the reformer (2) and the other end communicating with the reformed gas outlet (21) of the housing (22).
The housing (22) includes a raw material gas inlet (27) communicating with an upstream portion of the zigzag passage composed of the plurality of small chambers (29 to 32), and a downstream portion of the zigzag passage through the gas passage. fuel reforming apparatus characterized by the raw material gas outlet (41) for communicating is provided on the inlet side (8). Before SL gas passage (8), characterized in that at least one aeration member diffusing the raw material gas passing through the gas passage (8) (42, 43) are provided, according to claim 1 or 2 The fuel reformer as described. Before SL gas introducing member (4, 4 '), the reformer (2), said heat exchanger (6) and said gas passage forming member (9) forms the respective cylinder, which four members (4,4 ', 2, 6, 9) are arranged coaxially, The fuel reformer according to any one of claims 1 to 3 characterized by things. Before Stories heat exchanger (6), and wherein the reformer (2) and the gas introducing member (4, 4 ') are integrated structure to each other are arranged vertically in this order from the bottom The fuel reformer according to any one of claims 1 to 4 .   The fuel reformer according to any one of claims 1 to 5, wherein the entire outer surface of the gas passage forming member (9) is covered with a heat insulating member (53).   The fuel reformer according to any one of claims 1 to 6, wherein the gas introduction member is a diffuser (4).   The gas introduction member (4, 4 ') has a large number of small holes (46) through which the source gas introduced into the gas introduction member (4, 4') passes to diffuse the source gas. At least one of a diffuser member (45), a screw-type guide member (47) for rotating the raw material gas, and a cone-shaped blowing member (50) for guiding the raw material gas to the downstream side substantially uniformly is provided. The fuel reformer according to any one of claims 1 to 7, wherein

Images