JP2009242162A - Reforming apparatus for fuel cell - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reforming apparatus for a fuel cell, in which the durability/long service life of a temperature detection part of a temperature sensor are improved by improving the reliability of the detection precision of the temperature detection part of the temperature sensor. <P>SOLUTION: The reforming apparatus 1 for the fuel cell is provided with: a reforming part 2 for producing a reformed gas from raw fuel to be reformed in reforming operation; housings 97, 99 for forming fluid passages through which fluids to be used in reforming operation are made to pass, respectively; temperature sensors 810, 820 each of which has the temperature detection part for detecting the temperature; and a fitting fixture 850 for fitting the temperature detection parts 811, 821 of the temperature sensors 810, 820 respectively to the outer wall surface sides of the housings 97, 99 so that the temperature detection part detects the temperature of the housing 97, 99 of the temperature sensor 810, 820. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a reformer for a fuel cell that generates reformed gas from a reforming fuel material.

  The above-described reformer includes a reforming unit that generates reformed gas from the reforming fuel material in the reforming operation, and an evaporation unit that generates steam used in the reforming reaction. In order to measure the temperature of the evaporation unit, the temperature detection unit of the temperature sensor is caused to enter the evaporation chamber of the evaporation unit.

Further, Patent Document 1 discloses that a reforming unit that generates reformed gas from a reforming fuel material, a combustion device that heats the reforming unit to a high temperature, and a component detection of combustion exhaust gas that is burned by the combustion device. A hydrogen generator having a CO sensor having a detection unit that enters a passage through which fuel exhaust gas passes, and an air supply unit that supplies air to the detection unit of the CO sensor so as to perform a cleaning operation of the detection unit of the CO sensor. It is disclosed.
JP 2007-217222 A

  According to the method in which the temperature detection unit of the temperature sensor enters the evaporation chamber of the evaporation unit, the temperature detection unit of the temperature sensor can detect the temperature of the fluid such as vapor in the vaporization unit well, There is a possibility that liquid phase water droplets, foreign matters, and the like based on the temperature detection unit itself of the temperature sensor may accumulate. In this case, there is a limit to improving the durability and extending the life of the temperature detection unit of the temperature sensor in order to improve the reliability of the detection accuracy by the temperature detection unit of the temperature sensor. In particular, when liquid phase water droplets based on water vapor accumulate in the temperature sensor itself, the temperature sensor temperature sensor detects the temperature of the liquid phase water droplets, not the vapor phase water vapor. Therefore, there is a limit to improving the reliability of detection accuracy. Furthermore, since the temperature detection part of the temperature sensor has a smaller surface area than the wall surface on which the temperature detection part is provided, if liquid phase water droplets accumulate in the temperature detection part, the reliability of detection accuracy can be improved. There is a limit. Further, when the fluid is hydrogen gas, hydrogen embrittlement may occur in the temperature detection part of the temperature sensor over a long period of use, and the durability and lengthening of the temperature detection part of the temperature sensor may increase. There is a limit to the lifetime.

  The present invention has been made in view of the above-described circumstances, and improves the reliability of the detection accuracy in the temperature detection unit of the temperature sensor, and is advantageous for improving the durability and extending the life of the temperature detection unit of the temperature sensor. It is an object of the present invention to provide a fuel cell reforming apparatus.

  A reformer for a fuel cell according to the present invention includes a reforming unit that generates reformed gas from a reforming fuel material in a reforming operation, and a fluid passage through which a reforming operation fluid used in the reforming operation passes. A temperature sensor that detects the temperature of the housing so that the temperature detection unit of the temperature sensor has a temperature detection unit that detects a temperature, a temperature sensor having a temperature detection unit that detects the temperature. And a fixture that is attached to the outer wall surface of the casing so that heat can be transferred to the casing.

  The temperature detection part of the temperature sensor is attached to the outer wall surface side of the housing with a fixture. The temperature detection part of the temperature sensor does not enter the flow passage and detects the temperature of the outer wall surface of the housing. For this reason, the possibility that foreign matter or the like flowing through the flow passage is accumulated in the temperature detection unit itself of the temperature sensor is suppressed. For this reason, it is suppressed that the temperature detection part of a temperature sensor misdetects the temperature of a foreign material. Furthermore, it is suppressed that a temperature detection part is damaged with a foreign material. Accordingly, the reliability of the detection accuracy of the temperature detection unit of the temperature sensor can be improved, and the durability of the temperature detection unit of the temperature sensor can be improved and the life can be extended.

  Here, the reforming unit generates reformed gas from the reforming fuel material in the reforming operation. The casing forms a fluid passage through which a reforming operation fluid used in the reforming operation passes, and uses a heat transfer material as a base material. Examples of heat transfer materials include alloy steels such as carbon steel and stainless steel, aluminum alloys, and copper alloys. The temperature sensor has a temperature detection unit that detects the temperature. The attachment has a function of attaching the temperature detection part of the temperature sensor to the outer wall surface side of the casing so that heat can be transferred to the casing so that the temperature detection part of the temperature sensor detects the temperature of the outer wall surface of the casing.

  The fuel cell reforming apparatus according to the present invention can preferably include the following aspects.

  -Preferably, the fixture has an aspect having a protrusion provided on the outer wall surface of the casing and transferring heat from the casing, and a joint that is attached to the protrusion and is joined so that the temperature detection section can transfer heat. it can. In this case, the temperature detection part of the temperature sensor can be attached to the outer wall surface side of the casing so that heat can be transferred to the casing.

  Preferably, the fluid passage is an evaporation chamber that generates water vapor from raw material water, and the housing forms an evaporation portion that forms the evaporation chamber, and the evaporation portion has a water inlet that supplies the raw material to the evaporation chamber. The aspect which has can be employ | adopted. In this case, at the height from the lower end to the upper end of the evaporation chamber, the temperature detection part of the temperature sensor is disposed closer to the upper end of the evaporation chamber than the lower end of the evaporation chamber, and the water inlet is the evaporation chamber. It is preferable that they are arranged closer to the lower end than to the upper end. In this case, since the liquid phase raw water is lower than the temperature of the water vapor in the evaporation chamber, it is preferable that the temperature detector of the temperature sensor is not affected by the temperature of the liquid phase raw water. Therefore, in the above case, the temperature detection part of the temperature sensor can be moved away from the water inlet. Therefore, it is suppressed that the temperature detection part of a temperature sensor receives the influence of the liquid phase raw material water supplied to the evaporation chamber from the water inlet. Therefore, it is advantageous to improve the reliability of the temperature measured by the temperature detection unit of the temperature sensor.

  Preferably, the fluid passage is an oxidation reaction chamber that reduces carbon monoxide contained in the reformed gas by an oxidation reaction that reacts with oxygen, and the housing forms a CO oxidation portion that forms the oxidation reaction chamber The mode which is doing can be adopted. In this case, the temperature detection part of the temperature sensor is preferably arranged in the upstream region of the oxidation reaction chamber rather than the downstream region of the oxidation reaction chamber. Since the oxygen concentration is higher in the upstream region of the oxidation reaction chamber than in the downstream region, the oxidation reaction easily proceeds. The oxidation reaction is exothermic. For this reason, the upstream region of the oxidation reaction chamber tends to be hot. Here, as the temperature of the oxidation reaction chamber, it is preferable to measure the temperature of the oxidation reaction chamber higher than the measurement temperature lower than the lower one. Therefore, in the above-described case, the temperature detection part of the temperature sensor is arranged in the upstream region from the downstream region of the oxidation reaction chamber. The upstream region means upstream from the midpoint of the channel length of the oxidation reaction chamber. The downstream region means downstream from the midpoint of the channel length of the oxidation reaction chamber. In some cases, the temperature detection unit of the temperature sensor may be disposed in a downstream region of the oxidation reaction chamber rather than an upstream region thereof.

  -Preferably, the aspect by which the diffusion promotion member which accelerates | stimulates the spreading | diffusion of the reformed gas in an oxidation reaction chamber is provided in the oxidation reaction chamber of CO oxidation part is employable. In this case, it is preferable that the diffusion promoting member is located upstream of the wall portion where the fixture is provided in the casing in the oxidation reaction chamber. If the diffusion of the reformed gas is promoted by the diffusion promoting member in the oxidation reaction chamber, the oxidation reaction in the oxidation reaction chamber is dispersed, and local heat generation in the oxidation reaction chamber is suppressed. In this case, the heat of the CO oxidation unit is easily transferred to the temperature detection unit of the temperature sensor. Therefore, even when the temperature detection part of the temperature sensor is provided on the outer wall surface side of the housing, it is advantageous for improving the reliability of temperature detection. Examples of the diffusion promoting member include punching metal having a plurality of through holes dispersed, a net member, and the like. The size of each through hole is preferably a size that can hold the catalyst carrier or the catalyst.

  -Preferably, the fluid passage is a shift reaction chamber that reduces carbon monoxide contained in the reformed gas by a shift reaction that reacts with water molecules, and the housing forms a shift portion that forms the shift reaction chamber. The aspect which is doing can be employ | adopted. In this case, the temperature detector of the temperature sensor can measure the temperature of the reformed gas flowing through the shift reaction chamber.

  -The temperature detection part of the temperature sensor is arranged outside the fluid passage. For this reason, the detection accuracy may be affected by disturbances outside the housing. Therefore, it is preferable that the casing is covered with a coating layer formed of a heat insulating material, and the temperature detection unit of the temperature sensor can be covered with the coating layer. In this case, since the influence of the disturbance outside the housing is suppressed, it is advantageous to increase the reliability of the measured temperature measured by the temperature detection unit of the temperature sensor.

  -Preferably, the aspect with which the responsiveness acceleration | stimulation member which accelerates | stimulates the heat transfer from the fluid passage to the temperature detection part of a temperature sensor is provided in the fluid passage is employable. Examples of the responsiveness promoting member include an alloy steel such as carbon steel and stainless steel, a heat transfer material such as nickel, nickel-chromium alloy, aluminum alloy, and copper alloy. You may perform surface treatments, such as plating, which improves corrosion resistance.

  It is preferable that the measured temperature measured by the temperature detection unit of the temperature sensor and the actual temperature in the fluid passage coincide with each other with high accuracy. However, there is a heat transfer delay from the fluid passage to the housing, heat transfer loss, and the like. Therefore, it is preferable to adopt a mode in which a control unit that corrects the measured temperature measured by the temperature detection unit of the temperature sensor to obtain a corrected temperature is provided. In this case, it is preferable that the control unit increases the correction value in the temperature rising direction when the temperature increase rate of the measured temperature measured by the temperature detecting unit of the temperature sensor is larger than a predetermined value. Here, when the rate of temperature increase change of the measured temperature is greater than a predetermined value, the temperature increase rate of the temperature in the fluid passage is fast. For this reason, in consideration of heat transfer delay and heat transfer loss from the fluid passage to the temperature detection unit of the temperature sensor, the measured temperature measured by the temperature detection unit of the temperature sensor may be lower than the actual temperature. Thus, when the rate of temperature increase is greater than the predetermined value, the degree of temperature increase is large, and therefore it is preferable that the control unit increase the correction value in the direction of temperature increase.

  More preferably, the control unit may employ a mode in which the correction value in the temperature decreasing direction is increased when the temperature decrease rate of the measured temperature measured by the temperature detection unit of the temperature sensor is larger than a predetermined value. When the temperature change rate of the measured temperature is greater than a predetermined value, the temperature drop rate of the temperature in the fluid passage is fast. For this reason, when the heat transfer delay from the fluid passage to the temperature detection part of the temperature sensor, the heat transfer loss, etc. are taken into account, the measured temperature measured by the temperature detection part of the temperature sensor may be higher than the actual temperature. Therefore, when the rate of change in temperature of the measured temperature measured by the temperature detection unit of the temperature sensor is greater than a predetermined value, the control unit preferably increases the correction value in the temperature reduction direction.

  -Gas fuel or liquid fuel may be used as the reforming fuel material. Specifically, hydrocarbon fuel and alcohol fuel can be employed. For example, hydrocarbon city gas, LPG, kerosene, methanol, dimethyl ether, gasoline, biogas and the like can be employed.

  ADVANTAGE OF THE INVENTION According to this invention, while improving the reliability of the detection accuracy in the temperature detection part of a temperature sensor, it becomes advantageous to the improvement of durability in the temperature detection part of a temperature sensor, and lifetime extension.

(Embodiment 1)
Embodiment 1 of the present invention will be specifically described below with reference to the drawings. The reformer according to this embodiment is applied to a stationary, industrial, or vehicle fuel cell system. FIG. 1 shows the overall concept of the reformer 1. 2 and 3 show the main part of the reformer 1. FIG. As shown in FIG. 1, the reformer 1 includes a reforming unit 2 that forms a combustion chamber 20, a combustion unit 25 that is inserted into the combustion chamber 20 and heats the reforming unit 2, an evaporation unit 50, and a shift unit. 60 and a CO oxidation unit 53. The combustion unit 25 is supplied with combustion fuel (or anode offgas discharged from the anode of the fuel cell) and combustion air. The reforming unit 2 has a cylindrical shape having a central axis P1 along the vertical direction, reforms the reforming fuel (reforming fuel material) with steam, and uses hydrogen as a main component (for example, 30). (Mole% or more) Reforming gas is generated. When the reforming fuel contains methane, it is based on the following formula (1).

  As shown in FIG. 2, the reforming section 2 includes an outer passage 21, an inner passage 22 formed coaxially with the outer passage 21, and an upper portion of the outer passage 21 and an inner passage 22. It has the return passage 23 which connects an upper part. The inner passage 22 and the outer passage 21 are partitioned by a second refractory layer 47. A lower portion of the outer passage 21 is an inlet 2 i of the reforming unit 2. The lower part of the inner passage 22 is an outlet 2p of the reforming unit 2. The outer passage 21 and the inner passage 22 accommodate a catalyst carrier 20a carrying a reforming catalyst. The catalyst carrier 20a is granular.

  As shown in FIG. 2, a first refractory layer 41 having a cylindrical shape is provided on the outer peripheral side of the reforming unit 2. The first refractory layer 41 includes a peripheral wall layer 41 a that is coaxial with the reforming portion 2 and a ceiling layer 41 c that covers the upper portion of the reforming portion 2. An intermediate lid 42 is attached to the ceiling layer 41c. The inner peripheral surface and the outer peripheral surface of the first refractory layer 41 form a first combustion passage 43 and a second combustion passage 44 that form a cylindrical shape communicating with the combustion chamber 20, respectively. The second combustion passage 44 communicates with a combustion exhaust gas passage 45 communicating with the outside. Further, on the outer peripheral side of the second combustion passage 44 defined by the first refractory layer 41, an evaporation portion 50 for evaporating the reforming water is formed coaxially. The evaporation part 50 is formed by a ring-shaped or cylindrical space having a narrow space width. A water inlet 50 i for supplying reforming water is formed in the lower part of the evaporation unit 50. When the pump 50m as a water conveyance source is driven, reforming water (raw material water) is supplied from the water inlet 50i to the evaporation unit 50. A water vapor outlet 50p that discharges water vapor generated by heating the reforming water is formed in the upper part of the evaporation unit 50. For this reason, in the evaporation part 50, water and water vapor flow upward. However, water and water vapor may be allowed to flow downward in the evaporation unit 50. A pump 50m that functions as a water conveyance source that supplies reformed water, which is liquid-phase water, to the evaporation unit 50 is provided. The control unit 100 includes a microcomputer and a memory, and controls the pump 50m, valves, and the like.

  On the outer peripheral side of the evaporation unit 50, a cylindrical CO oxidation unit 53 is coaxially provided adjacently via a cylindrical third refractory layer 48. The third refractory layer 48 is effective in preventing the heat of the CO oxidation unit 53 from being transmitted to the evaporation unit 50 and ensuring the temperature of the CO oxidation unit 53. An inlet 53 i that communicates with a mixing chamber, which will be described later, is formed below the CO oxidation unit 53. An outlet 53p communicating with the anode of the fuel cell is formed in the upper part of the CO oxidation unit 53.

  As shown in FIG. 1, the combustion gas burned in the combustion chamber 20 descends the first combustion passage 43, rises up the second combustion passage 44, flows out from the combustion exhaust gas passage 45, and is discharged to the outside. . The evaporator 50 is heated by the combustion gas flowing through the second combustion passage 44.

  Further, as shown in FIG. 1, the reformer 1 includes a heat exchange unit 54 disposed below the reforming unit 2, a shift unit 60 disposed below the heat exchange unit 54, and a shift unit 60. A warming-up unit 55 (used at startup) having an electric heater disposed between the heat exchanging unit 54 is provided. Here, a heat exchanging unit 54 is provided downstream (downward) of the reforming unit 2. A shift unit 60 is provided downstream (downward) of the heat exchange unit 54. The heat exchange unit 54 includes a first heat exchange passage 54a and a second heat exchange passage 54c that can exchange heat with each other. The heat exchanging unit 54 includes a raw material inlet 54 i that supplies a reforming fuel (for example, a hydrocarbon-based gas) as a fuel raw material, and a water vapor inlet 54 k that is supplied with water vapor generated by the evaporation unit 50.

The shift unit 60 promotes a shift reaction using water vapor (H ₂ O) based on the following formula (2), and reduces CO contained in the reformed gas. The CO shift unit 60 includes a catalyst carrier 60a having a shift catalyst that promotes a shift reaction. The shift catalyst is, for example, a copper-zinc catalyst, but is not limited thereto. The catalyst carrier 60a is granular. The shift unit 60 includes a reformed gas passage forming member 61 that forms a reformed gas passage through which the reformed gas flows. The reformed gas passage forming member 61 has an inner cylinder 62 that forms an inner first shift passage 61f (upstream region) and an inner cylinder 62 that forms an outer second shift passage 61s (downstream region). The outer cylinder 63 arranged coaxially, the first perforated plate 64 having a circular shape provided on the distal end (lower end) side of the inner cylinder 62, and the proximal end (upper end) side of the inner cylinder 62 It has the 2nd perforated board 65 which makes the provided ring shape, and the closing board 66 which closes the lower surface opening of the outer cylinder 63, and the lower surface opening of the inner cylinder 62. As shown in FIG. Since the first shift passage 61f and the second shift passage 61s are partitioned by the inner cylinder 62, the inner cylinder 62 functions as a partition member. The first shift passage 61f and the second shift passage 61s accommodate a catalyst carrier 60a that carries a shift catalyst.

  The first perforated plate 64 and the closing plate 66 form a return passage 67, and the reformed gas in the first shift passage 61f is U-turned in the direction of arrow E and flows into the second shift passage 61s. The first perforated plate 64 has a large number of through holes, and prevents the catalyst carrier 60a carrying the shift catalyst from falling while ensuring gas permeability. The second perforated plate 65 has a large number of through holes, and suppresses the scattering of the catalyst carrier 60a carrying the shift catalyst while ensuring gas permeability. The outer cylinder 63 is provided with a first forming member 71 (oxygen-containing gas passage forming member) that forms an air passage 70 (oxygen-containing gas passage) to which oxygen-containing air (oxygen-containing gas) is supplied.

The CO oxidation unit 53 is disposed downstream of the shift unit 60, and is an oxidation that oxidizes and reduces CO contained in the reformed gas purified by the shift unit 60 based on the following equation (3). It promotes the reaction. For this reason, the CO oxidation unit 53 includes a catalyst carrier 53a having an oxidation catalyst that promotes the oxidation reaction. The catalyst carrier 53a is granular. For example, a noble metal catalyst such as ruthenium-based, platinum-based, or platinum-ruthenium-based is employed as the oxidation catalyst, but is not limited thereto.
Formula (1) ... CH ₄ + H ₂ O → 3H ₂ + CO (endothermic reaction)
Formula (2): CO + H ₂ O → H ₂ + CO ₂ (exothermic reaction)
Formula (3): CO + 1 / 2O ₂ → CO ₂ (exothermic reaction)
Next, the operation of the reformer 1 will be described with reference to FIG. In this case, combustion air is supplied to the combustion unit 25 and combustion fuel is supplied to the combustion unit 25. As a result, the combustion section 25 is ignited, and a fuel flame 25 c is generated in the combustion chamber 20. The combustion fuel may be gaseous fuel, liquid fuel, or pulverized fuel. Specifically, hydrocarbon fuel and alcohol fuel can be employed. For example, hydrocarbon city gas, LPG, kerosene, methanol, dimethyl ether, gasoline, biogas and the like can be employed. The reforming unit 2 is heated to a high temperature (for example, 400 to 900 ° C.) by the combustion unit 25 so as to be suitable for the reforming reaction. The evaporation unit 50, the shift unit 60, and the CO oxidation unit 53 are also heated together with the reforming unit 2.

  When the reforming unit 2 is brought to an appropriate temperature region, reformed water (water before the reforming reaction) is supplied to the water inlet 50 i of the evaporation unit 50. The reformed water is heated in the evaporating section 50 to be steamed. The generated water vapor rises in the evaporation unit 50, and reaches the merging zone 56 from the water vapor outlet 50 p of the evaporation unit 50 through the water vapor passage 75 through the water vapor inlet 54 k of the heat exchange unit 54. On the other hand, the reforming fuel (fuel raw material) is supplied from the raw material inlet 54 i of the heat exchanging section 54 to the joining area 56 of the heat exchanging section 54. As a result, the reforming fuel and the steam are merged and mixed in the merge area 56. The reforming fuel may be gaseous fuel or liquid fuel. Specifically, hydrocarbon fuel and alcohol fuel can be employed. For example, hydrocarbon city gas, LPG, kerosene, methanol, dimethyl ether, gasoline, biogas and the like can be employed.

  The merged mixed fluid flows through the first heat exchange passage 54a on the low temperature side of the heat exchange section 54 and reaches the inlet 2i of the outer passage 21 of the reforming section 2. At this time, the high-temperature reformed gas discharged from the outlet 2p of the inner passage 22 of the reforming section 2 flows through the second heat exchange passage 54c of the heat exchange section 54. For this reason, the relatively high-temperature reformed gas and the mixed fluid having a temperature relatively lower than that of the reformed gas exchange heat with each other. Therefore, the mixed fluid before the reforming reaction is preheated. The preheated mixed fluid flows into the outer passage 21 of the reforming section 2 and flows in the direction of arrow A (see FIG. 2), makes a U-turn through the return passage 23 and flows into the inner passage 22 and moves in the direction of arrow B (FIG. 2). Flow). At this time, the mixed fluid in which the steam and the reforming fuel are mixed becomes a hydrogen-rich (20 mol% or more) reformed gas by the reforming reaction shown in the above (1). This reformed gas may contain carbon monoxide.

  Further, the high-temperature reformed gas that has undergone the reforming reaction flows from the outlet 2p of the inner passage 22 of the reforming section 2 into the heat exchanging section 54 in the direction of arrow C (see FIG. 2). That is, the high temperature reformed gas passes through the second heat exchange passage 54c on the high temperature side of the heat exchange section 54, thereby heating the mixed fluid in the first heat exchange passage 54a on the low temperature side. Further, the reformed gas flows in the direction of arrow D from the inlet 60 i of the shift unit 60 into the first shift passage 61 f of the shift unit 60 via the warm-up unit 55. In the shift unit 60, a shift reaction using water vapor is performed as shown in the above formula (2). As a result, the concentration of carbon monoxide (toxic gas) contained in the reformed gas is reduced.

Further, the reformed gas in which the concentration of carbon monoxide is reduced in the shift portion 60 flows from the shift portion 60 through the return passage 67 in the directions of arrows E and G (see FIG. 4), passes through the second porous plate 65, It reaches the mixing chamber. Further, the reformed gas flows through the mixing chamber, flows from the outlet 81p of the mixing chamber through the passage 85 in the directions of arrows H and I (see FIG. 2), and flows into the CO oxidation unit 53 from the inlet 53i. In the oxidation reaction chamber 53s of the CO oxidation unit 53, the reformed gas flows in the direction of arrow J (upward, see FIG. 2). In the CO oxidation part 53, as shown in the above formula (3), an oxidation reaction (CO + 1 / 2O ₂ → CO ₂ ) using oxygen is performed. As a result, CO contained in the reformed gas is purified and further reduced. The reformed gas thus purified is supplied as an anode gas from the outlet 53p of the CO oxidation section 53 to the fuel electrode (anode) of the fuel cell. The air that functions as the cathode gas is supplied to the oxidant electrode (cathode) of the fuel cell. As a result, a power generation reaction occurs in the fuel cell, and electric energy is generated. The off-gas after the power generation reaction of the anode gas (the gas discharged from the anode of the fuel cell) contains hydrogen that has not undergone the power generation reaction. For this reason, the off gas is supplied to the combustion unit 25 and burned, and becomes a heat source of the combustion unit 25. In addition, the whole reformer 1 is coat | covered with the coating layer 200 (refer FIG. 1) which makes the outer shell shape formed with the heat insulation material. The covering layer 200 enhances heat insulation and enhances heat insulation against the outside.

  Further, the reformer 1 of the present embodiment will be described with reference to FIG. The reformer 1 has a first cylinder 91, a second cylinder 92, a third cylinder 93, a fourth cylinder 94, a fifth cylinder 95, a sixth cylinder 96, a seventh cylinder 97, Eight cylinders 98 and ninth cylinders 99 are coaxial with respect to the central axis P1. Each of the cylinders 91 to 99 has a cylindrical shape and is made of metal (for example, stainless steel). Here, in the reforming unit 2, the first cylinder 91, the second cylinder 92, the third cylinder 93, and the fourth cylinder 94 are arranged coaxially. The first cylinder 91 has a bottomed shape, and includes a bottom portion 91c and an engagement pin 91e that protrudes downward and is fixed to the bottom portion 91c by welding or a fixture.

  As shown in FIG. 3, a cylindrical inner passage 22 (gas passage, catalyst) in which the reforming catalyst carrier 20a is accommodated between the outer peripheral surface of the first tube 91 and the inner peripheral surface of the second tube 92. A passage) is formed. An outer passage 21 (gas passage, catalyst passage) having a cylindrical shape in which the reforming catalyst carrier 20a is accommodated is formed by the outer peripheral surface of the third tube 93 and the inner peripheral surface of the fourth tube 94. . A first combustion passage 43 having a ring shape or a cylindrical shape is formed by the outer peripheral surface of the fourth cylinder 94 and the inner peripheral surface of the first refractory layer 41. The inner peripheral surface of the fifth cylinder 95 covers the first refractory layer 41. A second combustion passage 44 having a ring shape is formed by the outer peripheral surface of the fifth cylinder 95 and the inner peripheral surface of the sixth cylinder 96. The upper opening of the sixth cylinder 96 is closed with a main lid 49. The outer peripheral surface of the sixth cylinder 96 and the inner peripheral surface of the seventh cylinder 97 form an evaporation section 50 formed in a ring-shaped or cylindrical space. The outer peripheral surface of the seventh tube 97 and the inner peripheral surface of the eighth tube 98 are covered with a third refractory layer 48 having a cylindrical shape. The outer peripheral surface of the eighth cylinder 98 and the inner peripheral surface of the ninth cylinder 99 form a CO oxidation portion 53 having a cylindrical shape.

  As shown in FIG. 2, a metal main fixing portion 86 is disposed below each cylinder. However, the main fixing portion 86 may be made of a refractory material. The main fixing portion 86 has a first communication hole 86 f communicating with the outer passage 21 of the reforming portion 2 and a second communication hole 86 s communicating with the inner passage 22 of the reforming portion 2. The lower end of the third cylinder 93, the lower end of the fourth cylinder 94, and the lower end of the sixth cylinder 96 are fixed to the metal main fixing portion 86 by welding or the like. A ring-shaped lid 88 is joined to the upper end of the first cylinder 91 and the upper end of the fourth cylinder 94 by welding or the like.

  A first perforated plate 110 having gas permeability is disposed below the outer passage 21 of the reforming unit 2. The first perforated plate 110 has a ring shape coaxial with the central axis P1, and is formed of a metal punching metal or a net member having a large number of through holes 110m penetrating in the thickness direction. The first porous plate 110 suppresses the catalyst carrier 20a accommodated in the outer passage 21 from falling. A sub-fixing portion 87 is placed on the main fixing portion 86. The sub-fixing portion 87 is made of a refractory material or metal. The sub-fixing portion 87 and the main fixing portion 86 hold a main perforated plate 150 having gas permeability for allowing the reformed gas to pass therethrough. The main perforated plate 150 has a circular shape, and is formed of a punching metal or a net member having a large number of through holes 150m penetrating in the thickness direction in order to allow the reformed gas to pass therethrough. The engagement pin 91e of the first cylinder 91 is inserted into the engagement hole 150e of the main porous plate 150 and engaged therewith. Thereby, the positioning accuracy of the first cylinder 91 is ensured during assembly, and the coaxiality of the first cylinder 91 is easily ensured. Therefore, it can contribute to equalizing the passage width of the inner passage 22 in the circumferential direction thereof. For this reason, unevenness of the catalytic reaction in the inner passage 22 is reduced, and the reforming reaction can be favorably performed.

As shown in FIGS. 2 and 3, a second perforated plate 120 having gas permeability is held in the lower part of the CO oxidation part 53. A third perforated plate 130 having gas permeability is held in the upper part of the CO oxidation part 53. The second perforated plate 120 and the third perforated plate 130 have a ring shape that is coaxial with the central axis P1, and are punched metal having a large number of through-holes 120m and 130m that penetrate and disperse in the thickness direction. It is formed of a net member. The second porous plate 120 prevents the catalyst carrier 53a of the CO oxidation unit 53 from falling. The third perforated plate 130 covers the catalyst carrier 53a of the CO oxidation unit 53 while ensuring gas permeability. In addition, the reforming device 1 tilts during the period from manufacture to transportation and installation of the reforming device 1, and serves to prevent the catalyst carrier 53 a of the CO oxidation unit 53 from dropping or spilling.
The CO oxidation unit 53 includes a lower space 53 d that forms a ring shape below the second porous plate 120, and an upper space 53 u that forms a ring shape above the second porous plate 120.

  As shown in FIGS. 2 and 3, heat transfer fins 46 that function as responsiveness promoting members are inserted into the second combustion passage 44. A projection 96a (engagement body) is formed on the lower portion of the sixth cylinder 96 so as to project in the radially inward direction. A plurality of protrusions 96 a are provided intermittently at intervals in the circumferential direction of the sixth cylinder 96. The protrusion 96a can contribute to enhancing the coaxiality between the fifth cylinder 95 and the sixth cylinder 96. Furthermore, the drop of the heat transfer fin 46 is suppressed by the protrusion 96a. When the reformer 1 is assembled, the parts constituting the reformer 1 may be arranged upside down. Even in such a case, the drop of the heat transfer fin 46 is suppressed by the flange portion 42 f of the intermediate lid 42.

According to this embodiment, as shown in FIGS. 1 and 4, the cooling unit 80 having the mixing chamber is provided adjacent to the shift unit 60. The mixing chamber is adjacent to the inlet 60i of the first shift passage 61f (upstream region) of the shift unit 60 and adjacent to the outlet 60p of the second shift region 60s (downstream region) of the shift unit 60. In other words, the mixing chamber is adjacent to both the upstream region and the downstream region of the shift unit 60. An inlet 70i of an air passage 70 for supplying air (atmosphere) communicates with the mixing chamber. Here, the shift reaction is exothermic based on the above formula (2) (CO + H ₂ O → H ₂ + CO ₂ ). The inlet 60i is generally in the range of 150 to 300 ° C., particularly in the range of 180 to 220 ° C., although it depends on the operating conditions of the reformer 1 and the type of catalyst of the catalyst carriers 20a, 53a, 60a. . When the shift unit 60 is heated to an excessively high temperature during operation of the reformer 1, there is a tendency that the effect of reducing the CO concentration based on the shift reaction accompanied by the heat generation described above is less likely to be exhibited. In particular, since the reformed gas reformed in the reforming unit 2 is supplied to the shift unit 60 through the heat exchange unit 54, the shift unit 60 tends to be at a high temperature. The temperature of the catalyst carrier 53a is higher than the activation temperature range of the catalyst, and the activity of the catalyst may be excessively reduced.

  In this regard, according to the present embodiment, as shown in FIG. 1, the mixing chamber that performs the cooling function when air is supplied is adjacent to the shift unit 60. Therefore, during the operation of the reformer 1, the shift unit 60 that performs a shift reaction accompanied by heat generation can be actively cooled by the air (atmosphere) in the mixing chamber, and the CO reduction effect in the shift unit 60 is good. Is obtained. Thus, since the shift part 60 can be cooled with the air before being supplied to the CO oxidation part 53, a dedicated cooling mechanism can be abolished and the cost can be reduced. The temperature of the air in the mixing chamber is lower than the normal temperature range of the shift unit 60, and can be, for example, the lowest value (for example, about 150) in the activation temperature range of the shift catalyst.

  In particular, according to this embodiment, the mixing chamber to which air is supplied includes the inlet 60i of the first shift passage 61f (upstream region) of the shift portion 60 and the second shift passage 61 of the shift portion 60 (downstream region). ) Next to both outlets 60p. For this reason, both the inlet 60i and the outlet 60p of the shift part 60 that performs a shift reaction accompanied by heat generation can be actively cooled by air (atmosphere). In particular, it is effective to cool the upstream region of the shift unit 60 positively. In particular, it is effective to actively cool the inlet 60i in the upstream region. The reason is that the reformed gas (CO concentration is high) immediately after passing through the heat exchange unit 54 from the reforming unit 2 is supplied from the inlet 60i to the first shift passage 61f (upstream region) of the shift unit 60. It is effective to cool the upstream region, particularly the inlet 60i.

  The central axis of the mixing chamber is coaxial with the central axis P1. The mixing chamber has a ring-shaped or cylindrical space that goes around the central axis P1 and is coaxial with the shift portion 60 (particularly the inlet 60i). This is advantageous for increasing the cooling area for cooling the shift portion 60 (particularly the inlet 60i).

  Further explanation will be added. In the mixing chamber, a reformed gas that may contain carbon monoxide generated in the reforming unit 2 (the reformed gas that flows through the shift unit 60 and is supplied to the CO oxidizing unit 53), and an air passage. Air (oxygen-containing gas) is supplied from an inlet 70i of 70 and mixed. Therefore, the mixing chamber can function as a mixing chamber that mixes the reformed gas and air upstream of the CO oxidation unit 53. The second shift passage 61s as the reformed gas passage forms a passage extending with respect to the mixing chamber axis (center axis P1). Therefore, the second shift passage 61s (reformed gas passage) flows the reformed gas along the direction in which the second shift passage 61s extends, that is, along the arrow G direction (upward).

  On the other hand, as shown in FIG. 4, the air passage 70 functioning as an oxygen-containing gas passage has a radial direction (arrow R) along the direction perpendicular to the central axis P <b> 1 of the mixing chamber. Direction). Here, as shown in FIG. 4, a direction changing portion 82 is provided on the inner peripheral side of the mixing chamber. The direction changing unit 82 has a function of guiding the reformed gas supplied from the second shift passage 61s and the air to collide with each other. Specifically, in the cross section passing through the central axis line P1 (FIGS. 1 and 4), the direction changing portion 82 is provided so as to make one round around the central axis line P1, and is substantially straight with respect to the central axis line P1. It has the inclined surface 82a inclined in the shape. The inclination angle θ1 of the inclined surface 82a with respect to the direction parallel to the central axis P1 can be in the range of 20 to 80 degrees, in the range of 30 to 60 degrees, or in the range of 35 to 55 degrees.

  As shown in FIG. 4, the direction changing part 82 is inclined with respect to the central axis P1 of the cooling passage (the reforming part 2). The direction changing part 82 is inclined so as to reduce in diameter as it goes downward in the direction of gravity. That is, the direction change part 82 inclines so that it may expand in diameter as it goes upwards. When the air is not supplied to the mixing chamber, the direction changing unit 82 causes the reformed gas flowing in the second shift passage 61s in the direction indicated by the arrow G (the direction along the central axis P1) to flow in the radially outward direction (the arrow). S direction). Further, when the reformed gas is not flowing, the direction changing unit 82 is configured such that the air passage 70 is in the direction in which the axis of the mixing chamber (center axis P1) extends in the mixing chamber through the air flowing in the direction of the arrow R (see FIG. (Direction of arrow T shown in FIG. 4). As a result, the direction changing section 82 guides the reformed gas and air so that the reformed gas and air collide with each other in the mixing chamber. For this reason, the reformed gas and air tend to collide with each other in the mixing chamber. Therefore, turbulent flow proceeds in the mixing chamber, and the mixing property of the reformed gas and air in the mixing chamber can be improved.

  According to the present embodiment, the direction changing portion 82 is formed by expanding the base end portion 62b of the inner cylinder 62 into a conical shape in the radially outward direction. In this case, an increase in the strength of the direction changing portion 82 due to work hardening can be expected during the diameter expansion process. As described above, since the direction changing part 82 is formed by a part of the inner cylinder 62, no separate parts are required, and the number of parts can be reduced. The inner cylinder 62 described above functions as a partition member that partitions the shift unit 60 and the cooling unit 80. The mixing chamber is formed using an inner cylinder 62 (partition member) that partitions the shift unit 60 and the cooling unit 80. In this case, the shift unit 60 and the cooling unit 80 are provided adjacent to each other via the inner cylinder 62 (partition member).

  FIG. 5 schematically shows a conceptual form for visually confirming the mixed state from a plane. As shown in FIG. 5, the reformed gas supplied to the mixing chamber is directed outward (in the direction of the arrow S) by the direction changing unit 82. On the other hand, the air supplied from the inlet 70i of the air passage 70 to the mixing chamber is directed in the radial direction (arrow R direction) and further directed to the direction changing portion 82, and then directed in the arrow T direction (see FIG. 4). To do. For this reason, especially in the vicinity of the inlet 70i of the air passage 70, the degree of collision as a counterflow between the air and the reformed gas increases. This promotes turbulence in the mixing chamber. Therefore, the uniform mixing property of the air and the reformed gas in the mixing chamber is increased. In particular, in the vicinity of the inlet 70i of the air passage 70, the above-described uniform mixing property increases.

  Here, the inlet 70i of the air passage 70 is provided at a position farthest from the outlet 81p in the mixing chamber. The air supplied to the mixing chamber from the inlet 70i of the air passage 70 flows along the circumferential direction of the mixing chamber and is discharged from the outlet 81p of the mixing chamber. If the mixing property in the mixing chamber of air and the reformed gas is improved as described above, when the reformed gas containing air is supplied from the inlet 53i to the CO oxidation unit 53, the CO oxidation reaction in the CO oxidation unit 53 is performed. It can be carried out well. Here, in order to promote the reaction, it is important to mix uniformly. If the structure which forms the direction change part 82 in the above-mentioned mixing chamber is employ | adopted, the uniform mixing property of hydrogen and oxygen in a mixing chamber will be improved.

  In addition, according to FIG. 5, the inlet_port | entrance 70i of the air passage 70 is a single form. Further, a plurality of inlets 70i of the air passage 70 may be provided in the circumferential direction of the mixing chamber. In this case, the uniform mixing property between the air and the reformed gas is further increased. As can be understood from FIG. 4, when the reformed gas flowing on the outer peripheral side hits the inclined surface 82c of the direction changing section 82 at the inlet 60i of the shift section 60, the reformed gas is centered in the direction of arrow KA (see FIG. 4). Guided toward P1. Furthermore, according to this embodiment, as shown in FIG. 5, the mixing chamber is extended in the shape of a ring or a cylinder around the central axis P1. Therefore, a passage distance (passage distance from the inlet 70i to the outlet 81p) flowing through the mixing chamber itself is ensured. Therefore, it is possible to secure a mixing distance for mixing the air and the reformed gas in the mixing chamber, which is advantageous in further improving the mixing property of the air and the reformed gas.

  In addition, according to the present embodiment, as shown in FIG. 1, a passage 85 extending from the outlet 81 p of the mixing chamber of the cooling unit 80 adjacent to the shift unit 60 to the inlet 53 i of the CO oxidation unit 53. Is extended. That is, the mixing chamber of the cooling unit 80 is disposed upstream of the CO oxidation unit 53, and there is a passage distance of a passage 85 that connects the mixing chamber and the CO oxidation unit 53. Further, since the diameter is reduced by the outlet 81p and the pressure loss is increased, the gas mixing property is further improved. For this reason, when the reformed gas containing air flows through the passage 85, the reformed gas and air can be further mixed by diffusion or the like in the passage 85 (pipe upstream of the CO oxidation unit 53), thereby further improving the mixing property. It can be expected to increase further. Therefore, it is advantageous to further improve the oxidation reactivity in the CO oxidation part 53.

  Further, according to the present embodiment, as described above, as shown in FIG. 4, the shift unit 60 forms the first shift passage 61f that houses the catalyst carrier 60a carrying the shift catalyst and flows the reformed gas. The inner cylinder 62, the outer cylinder 63 that houses the catalyst carrier 60 a that supports the shift catalyst and that forms the second shift passage 61 s through which the reformed gas flows, and the inner cylinder 62 so as to face the tip 62 c of the inner cylinder 62. And a first perforated plate 64 disposed along the direction perpendicular to the axis of the outer cylinder 63. The first perforated plate 64 has a through hole penetrating in the thickness direction. As shown in FIG. 4, a minute gap 68 having a gap width is formed between the distal end portion 62 c of the inner cylinder 62 and the first porous plate 64. Thereby, even when the thermal expansion along the axial direction of the inner cylinder 62 is large, the tip end portion 62c of the inner cylinder 62 is prevented from colliding with the first porous plate 64 excessively. Accordingly, the first perforated plate 64 and the inner cylinder 62 are made thin, and their life and durability are ensured. In particular, deformation of the first porous plate 64 having a large number of through holes is suppressed.

  FIG. 2 shows the features of this embodiment. As shown in FIG. 2, the seventh cylinder 97 functioning as the first housing constitutes an evaporation section 50 that forms an evaporation chamber 51 (fluid passage), and is representative of alloy steels such as stainless steel and carbon steel. Made of metal (heat transfer material). The evaporation part 50 has the water inlet 50i which supplies a raw material to the evaporation chamber 51 as mentioned above. The water inlet 50 i is formed at the lower end 51 d of the evaporation chamber 51. In other words, the water inlet 50 i is disposed so as to be closer to the lower end 51 d than to the upper end 51 u of the evaporation chamber 51.

  As shown in FIG. 6, the first temperature detector 811 of the first temperature sensor 810 has a signal line 813, is not entered into the evaporation chamber 51, and is a seventh cylinder 97 that forms the evaporation chamber 51. A first attachment 850 is detachably attached to the outer wall surface of the seventh cylinder 97 so as to detect its own temperature. For this reason, the first temperature detection unit 811 itself of the first temperature sensor 810 can be prevented from collecting liquid-phase water flowing through the evaporation chamber 51, foreign matters contained in the water, and the like. For this reason, it is suppressed that the 1st temperature detection part 811 of the 1st temperature sensor 810 misdetects the temperature of liquid phase water, a foreign material, etc. Furthermore, the first temperature detector 811 is suppressed from being oxidized and deteriorated by the gas containing water vapor. Therefore, the reliability of the detection accuracy of the first temperature detection unit 811 of the first temperature sensor 810 is improved, and the durability of the first temperature detection unit 811 of the first temperature sensor 810 is advantageously improved and the service life is extended. Become.

  Here, the liquid phase raw water supplied from the water inlet 50 i to the evaporation chamber 51 is generally lower than the temperature of water vapor in the evaporation chamber 51. For this reason, it is preferable that the 1st temperature detection part 811 of the 1st temperature sensor 810 does not receive to the influence of the temperature of liquid phase raw material water. In this case, at the height from the lower end 51d of the evaporation chamber 51 to the upper end 51u of the evaporation chamber 51, the first temperature detection unit 811 of the first temperature sensor 810 is higher than the lower end 51d of the evaporation chamber 51 in the seventh tube 97. It arrange | positions so that it may become close to the upper end 51u of the evaporation chamber 51. FIG. As a result, in the height direction of the reformer 1, the first temperature detector 811 of the first temperature sensor 810 is kept as far as possible from the water inlet 53i. Accordingly, the first temperature detection unit 811 of the first temperature sensor 810 is suppressed from being affected by the liquid phase raw material water supplied from the water inlet 53i to the evaporation chamber 51, and the first temperature of the first temperature sensor 810 is suppressed. This is advantageous for improving the reliability of the temperature measured by the detection unit 811. When the height from the lower end 51d of the evaporation chamber 51 to the upper end 51u of the evaporation chamber 51 is relatively displayed as 100 (H1 shown in FIG. 6), the first temperature detection unit 811 of the first temperature sensor 810 is the evaporation chamber. It is preferable to arrange | position within the range of 60-100 from the lower end 51u of 51, the range of 70-100, the range of 80-100, and the range of 90-100.

  Further, as shown in FIG. 2, in the circumferential direction of the reformer 1, the first temperature detector 811 of the first temperature sensor 810 is located on the side opposite to the water inlet 53 i and is away from the water inlet 53 i. .

  Further, the wall portion 97m to which the first temperature detection unit 811 is attached in the seventh cylinder 97 is along the vertical direction. Therefore, even if the liquid phase raw water adheres to the inner wall surface of the wall portion 97m of the seventh cylinder 97, the liquid phase water can be caused to flow down quickly by gravity. Accordingly, even when the first temperature detection unit 811 of the first temperature sensor 810 is provided on the outer wall surface side of the seventh cylinder 97, the temperature measured by the first temperature detection unit 811 of the first temperature sensor 810. It is advantageous to increase the reliability of the system. Furthermore, even if the first temperature sensor 810 breaks down, the first temperature sensor 810 can be easily replaced.

  According to the present embodiment, as shown in FIG. 6, the ninth cylinder 99 (housing) that functions as the second housing constitutes the CO oxidation section 53 that forms the oxidation reaction chamber 53s (fluid passage). It is made of a metal (heat transfer material) typified by alloy steel such as stainless steel and carbon steel. The CO oxidation unit 53 has an inlet 53i (oxygen inlet) for supplying a mixed gas in which air (oxygen-containing gas) and reformed gas are mixed into the oxidation reaction chamber 53s. The inlet 53 i is formed on the lower end side of the CO oxidation unit 53. Here, the second temperature detection unit 821 of the second temperature sensor 820 has a signal line 823, is not entered into the oxidation reaction chamber 53s, and the ninth housing 99 forming the oxidation reaction chamber 53s. The second fitting 850 is attached to the outer wall surface side of the ninth cylinder 99 so as to detect the temperature. As a result, the possibility that foreign matters (for example, catalyst carrier soot) flowing in the oxidation reaction chamber 53s and the like are accumulated in the second temperature detection unit 821 itself of the second temperature sensor 820 is suppressed. For this reason, it is possible to prevent the second temperature detection unit 821 of the second temperature sensor 820 from erroneously detecting the temperature of a foreign object or the like. Further, it is possible to prevent the second temperature detection unit 821 from being damaged by foreign matter or the like. Therefore, the reliability of the detection accuracy of the second temperature detection unit 821 of the second temperature sensor 820 is improved, and the durability of the second temperature detection unit 821 of the second temperature sensor 820 is advantageously improved and the service life is extended. Become.

  Further, the second temperature detection unit 821 of the second temperature sensor 820 is not in contact with the reformed gas mainly containing hydrogen in the CO oxidation unit 53. Therefore, hydrogen embrittlement of the second temperature detection unit 821 is suppressed, and the durability of the second temperature detection unit 821 can be improved and the life can be extended. Furthermore, even if the second temperature sensor 820 breaks down, the second temperature sensor 820 can be easily replaced.

  Air (oxygen-containing gas) is supplied to the oxidation reaction chamber 53s of the CO oxidation unit 53 from the inlet 53i together with the reformed gas. For this reason, the oxidation reaction easily proceeds in the vicinity of the inlet 53i (upstream region) in the oxidation reaction chamber 53s. The oxidation reaction is exothermic. For this reason, in the oxidation reaction chamber 53s, the upstream region is likely to be hotter than the downstream region. Here, as the temperature of the oxidation reaction chamber 53s, it is preferable to measure the temperature higher than the lower one as the measurement temperature for grasping the oxidation reaction of the oxidation reaction chamber 53s. Therefore, in the above case, the second temperature detection unit 821 of the second temperature sensor 820 is arranged in the upstream region in the oxidation reaction chamber 53s rather than the downstream region.

  The second porous plate 120 shown in FIG. 6 has a plurality of through holes 120m dispersed therein, is provided upstream of the oxidation reaction chamber 53s of the CO oxidation unit 53, and not only supports the catalyst carrier 53a, It can function as a diffusion promoting member that promotes diffusion of the reformed gas flowing into the oxidation reaction chamber 53s. In this case, the 2nd perforated panel 120 is located in the upstream of the wall part 99m in which the fixture 850 is provided among the 9th pipe | tube 99 (housing | casing). As described above, the plurality of through holes 120m of the second porous plate 120 promote the diffusion of the reformed gas flowing into the oxidation reaction chamber 53s. Thereby, the oxidation reaction in the oxidation reaction chamber 53s is locally dispersed. Therefore, the local oxidation reaction (exothermic reaction) in the oxidation reaction chamber 53s is suppressed. In this case, the heat of the CO oxidation unit 53 is easily transmitted to the second temperature detection unit 821 of the second temperature sensor 820 uniformly. Therefore, although the second temperature detection unit 821 of the second temperature sensor 820 is provided on the outer wall surface side of the ninth cylinder 99, the reliability of temperature detection by the second temperature detection unit 821 of the second temperature sensor 820. Can be improved.

  In addition, when the temperature outside the reformer 1 fluctuates suddenly due to disturbance or the like, the detection accuracy of the first temperature detection unit 811 of the first temperature sensor 810 and the detection accuracy of the second temperature detection unit 821 of the second temperature sensor 820. May decrease. In this regard, according to the present embodiment, the first temperature detection unit 811 of the first temperature sensor 810 and the second temperature detection unit 821 of the second temperature sensor 820 are covered with the coating layer 200. For this reason, it is suppressed that the 1st temperature detection part 811 and the 2nd temperature detection part 821 receive the influence of the disturbance of the temperature outside the reformer 1. FIG. Therefore, the reliability of the detection accuracy of the first temperature detection unit 811 and the second temperature detection unit 821 is enhanced.

  Note that, according to the present embodiment, there may be a heat transfer delay, a heat transfer loss, or the like from the evaporation chamber 51 to the first temperature detection unit 811 via the seventh cylinder 97. For this reason, the measured temperature measured by the first temperature detector 811 and the actual temperature in the evaporation chamber 51 do not exactly coincide with each other, but the difference is a minute value. Therefore, if it is assumed in the control mode, there is no practical problem even if the measured temperature measured by the first temperature detector 811 is authorized as the actual temperature of the evaporation chamber 51. Furthermore, the measured temperature measured by the first temperature detector 811 may be corrected to be a corrected temperature, and the corrected temperature may be adopted as the actual temperature in the evaporation chamber 51 in the control mode. Similarly, the measurement temperature measured by the second temperature detection unit 821 may be corrected to be a correction temperature, and the correction temperature may be adopted as the actual temperature of the CO oxidation unit 53 in the control mode.

(Embodiment 2)
7 and 8 show the second embodiment. The present embodiment shows basically the same configuration and operational effects as the first embodiment. The metal fitting 850 is a protrusion formed by a bolt that is provided by welding or the like on the outer wall surface of the seventh cylinder 97 (or the ninth cylinder 99) and that transfers heat from the seventh cylinder 97 (or the ninth cylinder 99). A joining member 855 having a crimping part 854 (joining part) capable of being crimped and having an insertion hole 853 into which the first temperature detection part 811 is inserted so as to be capable of transferring heat, and a crimping part 854. A first nut 856 that functions as a first fastening element that removably attaches the joining member 855 to the protrusion 852, and a second nut 857 that functions as a second fastening element that suppresses loosening of the first nut 856. The insertion hole 853 of the joining member 855 is fitted into the protrusion 852. The female screw of the first nut 856 and the female screw of the second nut 857 are screwed into the male screw of the protrusion 852 to fasten the joining member 855. The joining member 855 having the crimping portion 854, the first nut 856, and the second nut 857 are formed of a metal having good heat conductivity, for example, an alloy steel such as stainless steel or carbon steel, an aluminum alloy, a titanium alloy, or a copper alloy. ing. In a state where the first temperature detection unit 811 of the first temperature sensor 810 (the second temperature detection unit 821 of the second temperature sensor 820) is inserted into the insertion hole 853 of the crimp unit 854, the crimp unit 854 is plastically deformed by a tool or the like. Is done. For this reason, the 1st temperature detection part 811 (2nd temperature detection part 821) is attached to the crimping | compression-bonding part 854 so that heat transfer is possible. 7 and 8, WA indicates a heat transfer path from the seventh tube 97 (housing) to the first temperature detection unit 811 (or the second temperature detection unit 821). The first temperature detection unit 811 has a signal line 813. The second temperature detection unit 821 has a signal line 823.

(Embodiment 3)
FIG. 9 shows a third embodiment. The present embodiment shows basically the same configuration and operational effects as the first embodiment. As shown in FIG. 9, the cross-sectional shape of the insertion hole 853 of the crimping part 854 that functions as a joint part is a hexagonal shape (polygonal shape). The cross-sectional shape of the first temperature detection unit 811 is a circular shape. In this case, the inner wall surface of the insertion hole 853 and the outer wall surface of the first temperature detection unit 811 are in contact at a plurality of locations. For this reason, there are a plurality of heat transfer paths WA. Since the 1st temperature detection part 811 is heat-transferred from the several heat transfer path | route WA, the reliability of detection accuracy can be improved. The same applies to the second temperature detection unit 821.

(Embodiment 4)
FIG. 10 shows a fourth embodiment. The present embodiment shows basically the same configuration and operational effects as the first embodiment. As shown in FIG. 10, the seventh cylinder 97 functioning as a housing has a retreat chamber 51e in a direction of retreating from the evaporation chamber 51 that is a fluid passage. The fixture 850 is provided in a wall portion 97m of the seventh cylinder 97 that forms the evacuation chamber 51e. A first fixture 850 is protruded from the wall portion 97m in a fixed state by welding or the like. The wall portion 97m is preferably flat in consideration of the mounting property of the first mounting tool 850, mounting workability, securing of a contact area, heat conductivity, and the like. The first temperature detector 811 of the first temperature sensor 810 is retracted from the evaporation chamber 51 by the retracting chamber 51e, and therefore is less susceptible to the temperature of the liquid raw material water supplied to the evaporation chamber 51. .

(Embodiment 5)
FIG. 11 shows a fifth embodiment. The present embodiment shows basically the same configuration and operational effects as the first embodiment. Although not shown, the first temperature detector 811 of the first temperature sensor 810 that measures the temperature of the seventh cylinder 97 that forms the evaporation chamber 51, and the second that measures the temperature of the ninth cylinder 99 that forms the oxidation reaction chamber 53s. A second temperature detector 821 of the temperature sensor 820 is provided.

  Further, as shown in FIG. 11, a shift portion 60 that reduces carbon monoxide contained in the reformed gas by a shift reaction that reacts with water molecules is formed by the outer cylinder 63 (third housing). The outer cylinder 63 is made of a metal having good heat conductivity, for example, an alloy steel such as stainless steel or carbon steel, an aluminum alloy, a titanium alloy, or the like.

  In this case, the third temperature detector 831a of the third temperature sensor 830a can measure the temperature of the reformed gas flowing near the inlet of the second shift passage 61s that is a shift reaction chamber. The third temperature detection unit 831b of the third temperature sensor 830b can measure the temperature of the reformed gas flowing through the return passage 67 in the shift unit 60. The third temperature detector 831c of the third temperature sensor 830c can measure the temperature of the reformed gas flowing near the outlet of the second shift passage 61s that is a shift reaction chamber.

  As can be understood from FIG. 11, the third temperature detection unit 831 d of the third temperature sensor 830 d can measure the temperature of the reformed gas flowing near the outlet 81 p of the mixing chamber 81 related to the shift unit 60. The third temperature detection unit 831e can measure the temperature of the reformed gas flowing near the inlet 60i of the shift unit 60. Thus, the third temperature sensor 830a to the third temperature sensor 830e can be appropriately provided on the outer wall surface side of the outer cylinder 63 as the third casing forming the shift portion 60. For this reason, the third temperature sensor 830a to the third temperature sensor 830e do not have to penetrate the outer cylinder 63 (third housing) in the thickness direction thereof. Therefore, the freedom degree of selection of the position which provides 3rd temperature sensor 830a-3rd temperature sensor 830e can be raised. Even when the third temperature sensor 830a to the third temperature sensor 830e fail, they can be easily replaced.

  The first perforated plate 64 having gas permeability shown in FIG. 11 has a plurality of through holes 64m dispersed therein. The second porous plate 65 has a plurality of through holes 65m dispersed therein. The first perforated plate 64 and the second perforated plate 65 can function as a diffusion promoting member that promotes the diffusion of the reformed gas in the second shift reaction chamber 61s. Thereby, the shift reaction in the shift unit 60 is locally dispersed, and the local shift reaction (exothermic reaction) is suppressed. In this case, the heat generated in the shift unit 60 is easily transferred on average to the third temperature detection units 831a to 831e of the third temperature sensors 830a to 830e. Therefore, although the third temperature detectors 831a to 831e are attached to the outer wall surface side of the outer wall 63 by the fixture 850, it is advantageous for improving the reliability of temperature detection.

(Embodiment 6)
FIG. 12 shows a sixth embodiment. The present embodiment shows basically the same configuration and operational effects as the first embodiment. The covering layer 200 is formed of a heat insulating material and has a cylindrical shape as a whole. Although not shown, the first temperature detection unit 811 of the first temperature sensor 810 and the second temperature detection unit 821 of the second temperature sensor 820 are covered with the coating layer 200. Further, the third temperature detection unit 831 of the third temperature sensor 830 is also covered with the coating layer 200. For this reason, the influence of the external disturbance of the temperature of the reformer 1 is suppressed. Therefore, the reliability of the detection accuracy of the first temperature detection unit 811 and the second temperature detection unit 821 is enhanced.

  The covering layer 200 is formed of a first covering layer 210 and a second covering layer 220 that are divided into a plurality (two) in the lateral direction (arrow X5 direction). The first covering layer 210 and the second covering layer 220 each have a C shape in a horizontal section, and are joined by bands 281 and 282 to form a tubular shape as a whole. The 1st coating layer 210 has the end surface 211 extended along the perpendicular direction. The 2nd coating layer 220 has the end surface 221 extended along the perpendicular direction. The end surface 211 and the end surface 221 face each other and are joined.

  A plurality of C-shaped recesses 213 are formed on the end surface 211. A plurality of C-shaped recesses 223 are formed on the end surface 221. When the first cover layer 210 and the second cover layer 220 are assembled together, the recesses 213 and 223 form fitting holes 251 to 255, respectively. Here, the fitting hole 251 is fitted into the piping of the reformed gas outlet 53p toward the fuel cell. The fitting hole 252 is fitted into a pipe of the water inlet 50i that supplies water to the evaporation unit. The fitting hole 253 is fitted to the piping of the raw material inlet 54i that supplies the fuel raw material to the reforming portion. The fitting holes 254 are fitted into pipes of the first forming member 71 of the inlet 70i that supplies air (air for cooling and oxidation) to the mixing chamber. The fitting hole 255 is fitted into a combustion air or combustion fuel pipe.

  As shown in FIG. 12, one or both of the first covering layer 210 and the second covering layer 220 is bonded with a sheet-like heat insulating material 250 for absorbing dimensional errors that can be compressed in the thickness direction. A heat insulating material 250 is also bonded to the inner surface of the recess 213 and the inner surface of the recess 223. For this reason, the 1st coating layer 210 and the 2nd coating layer 220 are joined accurately, avoiding the influence of a dimensional tolerance, etc., and the airtightness of the coating layer 200 improves.

(Embodiment 7)
FIG. 13 shows a seventh embodiment. The present embodiment shows basically the same configuration and operational effects as the first embodiment. In the oxidation reaction chamber 53s of the CO oxidation unit 53, a responsiveness promoting member 825 is provided so as to face the second temperature detection unit 821 of the second temperature sensor 820. The heat of the oxidation reaction chamber 53 s of the CO oxidation unit 53 is transmitted to the ninth cylinder 99 via the responsiveness promoting member 825 and eventually transmitted to the second temperature detection unit 821. For this reason, even if the catalyst carrier 53a of the oxidation catalyst accommodated in the oxidation reaction chamber 53s is a porous ceramic such as alumina, and the heat conductivity is not high, the responsiveness to the temperature change of the oxidation reaction chamber 53s is enhanced. be able to. Therefore, although the second temperature detection unit 821 of the second temperature sensor 820 is attached to the outer wall surface side of the ninth cylinder 99, the reliability of measurement by the second temperature detection unit 821 of the second temperature sensor 820. Can be increased. The responsiveness promoting member 825 has a plurality of through holes 825m that enhance gas permeability. Note that examples of the base material of the responsiveness promoting member 825 include heat transfer materials such as alloy steels such as carbon steel and stainless steel, aluminum alloys, and copper alloys.

(Embodiment 8)
FIG. 14 shows an eighth embodiment. The present embodiment shows basically the same configuration and operational effects as the first embodiment. It is preferable that the measured temperature measured by the first temperature detection unit 811 of the first temperature sensor 810 and the actual temperature in the evaporation chamber 51 coincide with each other accurately. However, there is a heat transfer delay, a heat transfer loss, and the like from the evaporation chamber 51 of the evaporation unit 50 to the first temperature detection unit 811 via the seventh cylinder 97. Therefore, there is a possibility that the measured temperature measured by the first temperature detector 811 and the actual temperature in the evaporation chamber 51 do not necessarily coincide with each other accurately. Therefore, according to the present embodiment, the control unit 100 performs a correction process for correcting the measured temperature TA measured by the first temperature detection unit 811 of the first temperature sensor 810.

  As shown in FIG. 14, the control unit 100 reads the measured temperature TA measured by the first temperature detection unit 811 of the first temperature sensor 810 (step S102). It is determined whether the current process is a temperature rising process or a temperature falling process, or whether there is no temperature change (step S104). If the temperature state is the temperature rising process, the temperature increase rate Vh is obtained by calculation (step S106). In this case, Vh = temperature rise / unit time. The unit time can be set to 1 second or less, for example. Then, the temperature increase rate Vh is compared with the first predetermined value V1 (step S108). When the temperature increase rate Vh is smaller than the first predetermined value V1 (Vh <V1), the temperature increase rate of the evaporation chamber 51 is not excessive, and the followability of the measured temperature TA with respect to the temperature change of the evaporation chamber 51. Is estimated to be high. Therefore, the correction value α1 is added to the measured temperature TA to correct it to the high temperature side to obtain the corrected temperature TC (step S110). Further, when the temperature increase rate Vh of the measured temperature TA is equal to or higher than the first predetermined value V1 (V1 ≦ Vh), the temperature increase rate of the evaporation chamber 51 is fast, and the measured temperature TA with respect to the temperature change of the evaporation chamber 51. It is estimated that the followability of is low. In this case, it is estimated that the actual temperature of the evaporation chamber 51 is higher than the measured temperature TA. Therefore, the control unit 100 corrects the temperature increase side (high temperature side) so as to add the correction values α1 and α2 to the measured temperature TA with respect to the temperature change to obtain the correction temperature TC (step S112). In this way, the correction value in the temperature rising direction is increased with respect to the measured temperature TA to obtain the correction temperature TC. In addition to simple addition, the correction values α1 and α2 may be multiplied by a correction coefficient exceeding 1 so that the correction temperature TC is higher than the measurement temperature TA.

  If the result of determination in step S104 is that the temperature state is a temperature lowering process, the temperature change rate Vc is obtained by calculation (step S146). In this case, Vc = falling temperature / unit time. Then, the temperature change rate Vc is compared with the second predetermined value V2 (step S148). When the temperature decrease rate Vc is smaller than the second predetermined value V2 (Vc <V2), the temperature decreasing rate of the evaporation chamber 51 is not excessive, and the measured temperature TA has high followability with respect to the temperature change of the evaporation chamber 51. It is estimated to be. Accordingly, the correction value β1 is subtracted from the measured temperature TA so as to be corrected to the temperature lowering side (low temperature side) to obtain the correction temperature TC (step S150). Further, when the temperature change rate Vc is equal to or higher than the second predetermined value V2 (V2 ≦ Vc), the temperature decreasing rate of the evaporation chamber 51 is fast, and the followability of the measured temperature TA with respect to the temperature change of the evaporation chamber 51 is low. It is estimated to be. In this case, it is estimated that the actual temperature of the evaporation chamber 51 is lower than the actually measured measurement temperature TA. Therefore, the correction value β1 and β2 are subtracted from the measured temperature TA and corrected to the temperature lowering side to obtain the correction temperature TC (step S152). In this way, the correction value in the temperature decreasing direction is increased with respect to the measured temperature TA to obtain the correction temperature TC. Note that the correction values β1 and β1 may be simply added, or the measurement temperature TA may be multiplied by a correction coefficient less than 1 so that the correction temperature TC is lower than the measurement temperature TA. As a result of the determination in step S104, if the temperature state is neither the temperature raising process nor the temperature lowering process, a correction value α0 (a minute value) may be added to the measured temperature TA to obtain the correction temperature TC (step S160). Each correction value described above is preferably obtained experimentally according to the type of the reformer 1.

(Embodiment 9)
FIG. 15 shows a ninth embodiment. The present embodiment shows basically the same configuration and operational effects as the first embodiment. As shown in FIG. 15, the seventh cylinder 97 functioning as a metal cylinder forming the evaporation chamber 51 has a protruding portion 97 w in a direction protruding toward the evaporation chamber 51. The frequency of the vapor-phase or liquid-phase water flowing through the evaporation chamber 51 increases in contact with the protruding portion 97w. The fixture 850 of the first temperature sensor 810 is fixed to the protruding portion 97w of the seventh cylinder 97 by welding, brazing, screwing, or the like. Therefore, the detection accuracy of the first temperature detection unit 811 of the first temperature sensor 810 is ensured. The protruding portion 97 w may partially protrude in the seventh tube 97, or may extend in the circumferential direction of the seventh tube 97. The wall portion to which the first fixture 850 of the projecting portion 97w is attached is preferably flat in consideration of the mountability of the first fixture 850, the mounting workability, securing the contact area, heat transfer, and the like. This protrusion may be formed so as to protrude toward the oxidation reaction chamber 53s of the CO oxidation part 53 through which the reformed gas flows, or the shift passages 61f and 61s of the shift part 60 through which the reformed gas flows. It may be formed so as to protrude toward the surface. Since the frequency with which the reformed gas comes into contact with the protruding portion increases, the temperature detection is good.

(Other)
Each of the above-described embodiments can be used in combination with any one of the embodiments. In the first embodiment described above, both the temperature detection units 811 and 821 of the temperature sensors 810 and 820 are attached to the outer wall surface side of the casings 97 and 99. However, the present invention is not limited to this, and the temperature of the temperature sensors 810 and 820 is not limited. Only one of the detection units 811 and 821 may be used.

  Although the reformed gas is applied to the direction changing portion 82 to change the direction in the radially outward direction in the mixing chamber, the present invention is not limited to this, and the reformed gas is applied to the direction changing portion and directed in the radially inward direction in the cooling passage. Then, the direction may be changed to collide with air. In this case, the air is supplied to the mixing chamber so as to be directed outward. Although air is supplied to the mixing chamber, the present invention is not limited to this, and pure oxygen gas may be supplied. An oxygen-enriched gas enriched in oxygen concentration may be supplied. The direction changing portion 82 is inclined so as to decrease in diameter as it goes downward in the gravitational direction, but is not limited thereto, and may be configured to be inclined so as to decrease in diameter as it goes upward in the gravitational direction. it can. In this case, the reformed gas flowing downward hits the direction changing portion and is changed in direction.

  In the first embodiment, the reforming unit 2 includes both the inner passage 21 and the outer passage 22, but is not limited thereto, and only one of them may be used. The evaporation unit 50 is integrated with the reforming unit 2, but is not limited thereto, and the evaporation unit 50 may be separated from the reforming unit 2. Although the shift unit 60 is integrally connected to the reforming unit 2, the shift unit 60 may be separated from the reforming unit 2 without being limited thereto. In some cases, the shift unit 60 may be eliminated. The disconnecting unit 55 may be provided as necessary. Although the reforming unit 2 is disposed above the shift unit 60, the present invention is not limited thereto, and the reforming unit 2 may be disposed below or beside the CO shift unit 60. Although the combustion unit 25 is disposed on the upper side of the reforming unit 2, it may be disposed on the lower side of the reforming unit 2. In some cases, the first refractory layer 41, the second refractory layer 47, and the third refractory layer 48 may be eliminated.

  In the first embodiment, the reforming unit 2, the CO oxidation unit 53, and the evaporation unit 50 are arranged coaxially, but they may not be coaxial and may be non-coaxial types. Each catalyst is not limited to those described above. The catalyst carrier 20a carrying the reforming catalyst, the catalyst carrier 60a carrying the shift catalyst, and the catalyst carrier 53a carrying the oxidation catalyst are in the form of particles. However, the present invention is not limited to this, and a monolith structure may be used. In the first embodiment, the catalyst carrier 60a supporting the shift catalyst is not accommodated in the mixing chamber, but may be accommodated in some cases.

  Instead of the CO oxidation unit 53, a methanation reaction unit may be used. The methanation reaction unit reduces carbon monoxide by a methanation reaction in which carbon monoxide contained in the reformed gas is reacted with hydrogen to form methane.

  The covering layer 200, the heat transfer fin 46, the protrusion 96a, and the engagement pin 91e may be provided as necessary. Examples of the stainless steel used in the first cylinder 91 to the ninth cylinder 99 described above include austenitic stainless steel such as SUS310S and SUS304, or ferritic stainless steel such as SUS444. The piping used in the reformer 1 is exemplified by austenitic stainless steel such as SUS304. The present invention is not limited to the above-described embodiments, and can be implemented with appropriate modifications within a range not departing from the gist. The following technical idea can also be grasped from the above description.

(Additional Item 1) A reformer that generates reformed gas from a reforming fuel material in reforming operation, an inner wall surface that forms a fluid passage through which reforming fluid used in reforming operation passes, and A housing based on a heat transfer material having an outer wall facing away from the inner wall;
A temperature sensor having a temperature detection unit for detecting temperature; and the temperature detection unit of the temperature sensor is connected to the casing so that the temperature detection unit of the temperature sensor detects the temperature of the outer wall surface of the casing. A fixture attached to the outer wall surface side, and a control unit that corrects the measured temperature measured by the temperature detection unit of the temperature sensor to obtain a corrected temperature, and the control unit includes the temperature sensor. A reformer for a fuel cell, wherein when the rate of change in temperature rise of the measured temperature measured by the temperature detector is greater than a predetermined value, the measured temperature is corrected in the direction of temperature rise.

(Additional Item 2) A reforming section that generates reformed gas from the reforming fuel material in the reforming operation, an inner wall surface that forms a fluid passage through which the reforming operation fluid used in the reforming operation passes, A housing based on a heat transfer material having an outer wall facing away from the inner wall;
A temperature sensor having a temperature detection unit for detecting temperature; and the temperature detection unit of the temperature sensor is connected to the casing so that the temperature detection unit of the temperature sensor detects the temperature of the outer wall surface of the casing. A fixture attached to the outer wall surface side, and a control unit that corrects the measured temperature measured by the temperature detection unit of the temperature sensor to obtain a corrected temperature, and the control unit includes the temperature sensor. A reformer for a fuel cell, which corrects the measured temperature in the temperature-decreasing direction when the rate of change in temperature-measured temperature measured by the temperature detector is greater than a predetermined value.
(Additional Item 3) In a power generation operation of the fuel cell system, a casing made of a heat transfer material that forms a fluid passage through which an operating fluid passes, a temperature sensor having a temperature detection unit that detects temperature, and the temperature A fixture that attaches the temperature detection unit of the temperature sensor to the outer wall surface side of the casing so as to transfer heat to the casing so that the temperature detection unit of the sensor detects the temperature of the casing; A temperature detection device for a fuel cell power generation system. The housing may have a protrusion that protrudes toward the fluid passage. It is preferable to fix the temperature detection part or fixture of a temperature sensor to a protrusion part. Since the frequency with which the fluid in the fluid passage hits the protruding portion increases, temperature detection accuracy is ensured.

  The present invention can be used in a reformer used in a fuel cell system.

1 is a cross-sectional view showing a reformer according to Embodiment 1. FIG. FIG. 3 is a cross-sectional view illustrating the vicinity of a reforming unit of the reformer according to the first embodiment. FIG. 3 is an enlarged cross-sectional view illustrating a vicinity of a reforming unit of the reformer according to the first embodiment. FIG. 3 is an enlarged cross-sectional view illustrating the vicinity of a CO shift unit provided adjacent to the cooling passage of the reformer according to the first embodiment. FIG. 6 is a plan view schematically showing a flow form in the cooling passage when a single inlet of the air passage is provided according to the first embodiment. FIG. 3 is a cross-sectional view illustrating the vicinity of a temperature sensor attached to an evaporation unit and a CO oxidation oxidation unit of the reformer according to the first embodiment. It is a figure which shows typically the state just before attaching a temperature sensor to the evaporation part of a reformer concerning Embodiment 2. FIG. It is a figure which shows typically the state which concerns on Embodiment 2 and attached the temperature sensor to the evaporation part of the reformer. It is a figure which concerns on Embodiment 3 and shows the state which attached the temperature sensor to the junction part. FIG. 10 is a cross-sectional view schematically showing a state in which a temperature sensor is attached to a wall portion that forms a retracting chamber that communicates with an evaporation section of a reformer according to the fourth embodiment. It is sectional drawing which concerns on Embodiment 5 and shows typically the form which attached the 3rd temperature sensor to the shift part. It is a side view which shows the state which concerns on Embodiment 6 and has coat | covered the modifier with the coating layer. It is sectional drawing which concerns on Embodiment 7 and shows the form which attached the 3rd temperature sensor to the shift part typically. 10 is a flowchart illustrating an example of correction processing executed by a control unit according to an eighth embodiment. It is sectional drawing which concerns on Embodiment 9 and shows the state which attached the temperature sensor to the wall part which forms the evaporation part of a reformer.

Explanation of symbols

  1 is a reformer, 2 is a reforming section, 20 is a combustion chamber, 21 is an outer passage, 22 is an inner passage, 25 is a combustion section, 41 is a first refractory layer, 43 is a first combustion passage, and 44 is a second combustion passage. Combustion passage, 46 is a heat transfer fin, 50 is an evaporation section, 51 is an evaporation chamber, 50m is a pump (water conveyance source), 53 is a CO oxidation section, 54 is a heat exchange section, 60 is a shift section, 61 is a reformed gas A passage forming member, 61f is a first shift passage, 61s is a second shift passage, 62 is an inner tube, 63 is an outer tube, 70 is an air passage, 71 is a first forming member, 75 is a water vapor passage, 80 is a cooling unit, 81 is a cooling passage, 82 is a direction changing unit, 100 is a control unit, 110 is a first perforated plate, 120 is a second perforated plate, 150 is a main perforated plate, 810 is a first temperature sensor, and 811 is a first temperature detecting unit. , 820 is a second temperature sensor, 821 is a second temperature detector, 830 is a third temperature sensor, 831 Third temperature detector, 850 is a fixture, 852 is a protrusion, 853 is an insertion hole, 854 is a crimping part, 855 is a joining member, 97 is a seventh cylinder (housing), and 99 is a ninth cylinder (housing). Indicates.

Claims (9)

A reforming unit that generates reformed gas from the reforming fuel material in reforming operation;
A housing based on a heat transfer material that forms a fluid passage through which a reforming operation fluid used in the reforming operation passes; and
A temperature sensor having a temperature detection unit for detecting temperature;
An attachment for attaching the temperature detection part of the temperature sensor to the outer wall surface side of the casing so that heat can be transferred to the casing such that the temperature detection part of the temperature sensor detects the temperature of the casing; A reformer for a fuel cell comprising the reformer.   In Claim 1, the said fixture is protrudingly provided in the said outer wall surface of the said housing | casing, and the temperature detection part of the said temperature sensor attached to the said protrusion and the said temperature detection part can transfer heat. A reformer for a fuel cell, comprising: a joint portion joined to the fuel cell. 3. The fluid passage according to claim 1, wherein the fluid passage is an evaporation chamber that generates water vapor from raw material water, the housing forms an evaporation section that forms the evaporation chamber, and the evaporation section includes the evaporation chamber. It has a water inlet that supplies raw materials to
In the height from the lower end to the upper end of the evaporation chamber, the temperature detection part of the temperature sensor is arranged closer to the upper end of the evaporation chamber than the lower end of the evaporation chamber, and the water A reformer for a fuel cell, characterized in that an inlet is disposed closer to the lower end than the upper end of the evaporation chamber. 4. The fluid passage according to claim 1, wherein the fluid passage is an oxidation reaction chamber that reduces carbon monoxide contained in the reformed gas by an oxidation reaction that reacts with oxygen. Forming a CO oxidation portion forming an oxidation reaction chamber, the CO oxidation portion having an oxygen inlet for supplying an oxygen-containing gas to the oxidation reaction chamber;
The reforming apparatus for a fuel cell, wherein the temperature detection unit of the temperature sensor is arranged in an upstream region than a downstream region in the oxidation reaction chamber.   5. The diffusion promoting member for promoting diffusion of the reformed gas is provided in the oxidation reaction chamber of the CO oxidation unit, and the diffusion promoting member is provided with the fixture in the casing. A reformer for a fuel cell, which is located upstream of the wall portion.   4. The fluid passage according to claim 1, wherein the fluid passage is a shift reaction chamber that reduces a carbon monoxide contained in the reformed gas by a shift reaction that reacts with water molecules, and the housing includes A reformer for a fuel cell, wherein a shift portion for forming the shift reaction chamber is formed.   The said housing | casing is coat | covered with the coating layer formed with the heat insulation material in one of Claims 1-6, and the said temperature detection part of the said temperature sensor is the influence of the external disturbance of the said housing | casing. The fuel cell reformer is covered with the coating layer in order to suppress the above-described problem.   The responsiveness promoting member for accelerating heat transfer from the fluid passage to the temperature detecting portion of the temperature sensor is provided in the fluid passage according to claim 1. A reformer for a fuel cell.   9. The fuel cell according to claim 1, further comprising a control unit that corrects the measured temperature measured by the temperature detection unit of the temperature sensor to obtain a corrected temperature. Reformer.

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