JP2008095164A - Hydrogen production apparatus and method for assembling the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hydrogen producing apparatus in which an electric power can be easily and surely supplied to cylindrical electrochemical cells and the cylindrical electrochemical cells can be easily installed in a unit vessel. <P>SOLUTION: The hydrogen production apparatus is equipped with: a plurality of cylindrical electrochemical cells 1 made of a ceramic; a steam introducing pipe 6 for introducing steam into a pipe of each cylindrical electrochemical cell 1, a power supply part 12 for supplying an electric power to a hydrogen electrode 9 of the inner surface of each cylindrical electrochemical cell 1 so as to be a cathode; a power supply part 13 for supplying an electric power to an oxygen electrode 11 of the outer surface of each cylindrical electrochemical cell 1 so as to be an anode; a unit vessel 2 for housing the cylindrical electrochemical cells 1, the steam introducing pipe 6, the power supply part 12, and the power supply part 13; and a pedestal 22 provided in the unit vessel 2, and each cylindrical electrochemical cell 1 is installed in the pedestal 22 by fixing each of upper piping connected to an upper part of the electrochemical cell 1 and lower piping connected to a lower part of the electrochemical cell 1. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a hydrogen production apparatus for producing hydrogen by high-temperature steam electrolysis and an assembling method thereof.

  As one vision of the future society, the realization of a hydrogen energy society using hydrogen as an energy medium is attracting attention, and several promising hydrogen production methods are considered. Among several hydrogen production methods, the high-temperature steam electrolysis method is a method of electrolyzing water vapor at a high temperature of about 900 ° C., and the same hydrogen production amount can be obtained with about 30% less electric power than water electrolysis at room temperature. It is a hydrogen production method with high energy efficiency. Since the raw material is water, if a heat source that does not generate carbon dioxide is used, hydrogen can be produced without exhausting any carbon dioxide.

  The minimum unit in hydrogen production by this high temperature steam electrolysis is called a cell. This cell basically has a three-layer structure in which an electrolyte is placed in the middle and an oxygen electrode (anode) and a hydrogen electrode (cathode) are arranged on both sides of the electrolyte layer. Electrons are given at the hydrogen electrode, and water vapor is decomposed into oxygen ions and hydrogen. The decomposed oxygen ions pass through the electrolyte layer and release electrons at the oxygen electrode to generate oxygen. The electrolyte layer, the oxygen electrode, and the hydrogen electrode are made of ceramics so that they can withstand use at a high temperature of about 900 ° C.

  There are various types of cells. When a cylindrical cell in which the above three-layer structure is concentrically arranged is used, a cell unit is required to fix a large number of cylindrical cells in order to increase the amount of hydrogen produced. In order to supply current to a ceramic cylindrical cell, a power supply line is connected, and a plurality of wires connected to the power supply line are fixed to a pedestal to produce hydrogen.

As a hydrogen production apparatus that performs hydrogen production by electrolyzing water vapor, techniques relating to cell materials are known (see, for example, Patent Documents 1 and 2). However, the technique here relates to the material of the cell, and the technique related to the device structure is not disclosed. Further, as a hydrogen production apparatus, a technique related to a structure for electrolyzing water at room temperature is known (for example, see Patent Document 3), and a technique related to a structure using a flat plate cell is known (for example, Patent Document 3). 4). However, these technologies are mainly technologies related to flat-plate cells, and technologies relating to the structure of a unit in which cylindrical cells are integrated are not disclosed.
JP 2005-232525 A Japanese Patent Laid-Open No. 7-109592 Japanese Patent Laid-Open No. 11-241195 JP-A-6-173053

  In the hydrogen production by the conventional high-temperature steam electrolysis described above, when a power supply wire is wound around a cylindrical cell, the winding force is strong and the cell is damaged, or conversely, the winding force is weak and causes poor contact. There was a problem of fear.

  In addition, when fixing a cylindrical cell to a pedestal, it is very time-consuming to fix it to the cell by welding, and there is a risk of affecting the performance depending on the skill of the worker fixing the cell. There was a problem.

  In addition, since the roundness of cells made of ceramics is difficult to occur, structural discontinuities are likely to occur at the joint with the machined metal support, stress concentration may occur at the thin wall, and damage may occur. There was a problem that there was. When the joint is broken, the boundary between hydrogen and oxygen is destroyed, the amount of hydrogen produced is reduced, and further, there is a problem that hydrogen production cannot be performed.

  The present invention has been made to solve the above-described problem, and can easily and surely supply power to a cylindrical electrochemical cell, and further can be easily installed in a unit container. The purpose is to provide.

  In order to achieve the above object, in the hydrogen production apparatus of the present invention, a plurality of ceramic cylindrical electrochemical cells, a water vapor introducing tube for introducing water vapor into the tube of the cylindrical electrochemical cell, and the cylindrical electric cell A hydrogen electrode power feeding section that feeds the hydrogen electrode on the inner surface of the chemical cell to be a cathode, an oxygen electrode feeding section that feeds an oxygen electrode on the outer surface of the cylindrical electrochemical cell to be an anode, and the cylindrical electricity An upper part connected to the upper part of the cylindrical electrochemical cell, comprising a chemical container, a water vapor introduction pipe, a unit container for housing the hydrogen electrode feeding part and the oxygen electrode feeding part, and a pedestal provided in the unit container The cylindrical electrochemical cell is installed on the pedestal by fixing a pipe and a lower pipe connected to the lower part, respectively.

  In order to achieve the above object, in the method for assembling the hydrogen production apparatus of the present invention, a water vapor introducing tube for introducing water vapor into the tube of the cylindrical electrochemical cell, and a hydrogen on the inner surface of the cylindrical electrochemical cell. The cylindrical electrochemical cell is constructed by assembling a hydrogen electrode power feeding portion that feeds the electrode to be a cathode and an oxygen electrode feeding portion that feeds the oxygen electrode on the outer surface of the cylindrical electrochemical cell to be an anode The cylindrical electrochemical cell assembly step, the pedestal installation step for installing the pedestal in the unit container, and the upper pipe connected to the upper part of the cylindrical electrochemical cell and the lower pipe connected to the lower part thereof are fixed. A cylindrical electrochemical cell storage step of installing the cylindrical electrochemical cell on the pedestal and storing the cylindrical electrochemical cell in the unit container. It is an.

  According to the hydrogen production apparatus of the present invention, it is possible to easily and reliably supply power to a cylindrical electrochemical cell by providing a metal belt-like feeder line in a ceramic cylindrical electrochemical cell. Furthermore, by fixing the upper pipe connected to the upper part of the cylindrical electrochemical cell and the lower pipe connected to the lower part, and installing the cylindrical electrochemical cell on the pedestal, the cylindrical electrochemical cell is placed in a unit container. Can be easily stored inside.

  Embodiments of a hydrogen production apparatus and an assembly method thereof according to the present invention will be described below with reference to the drawings. Here, the same or similar parts are denoted by common reference numerals, and redundant description is omitted.

  FIG. 1 is a longitudinal sectional view showing a basic configuration of a hydrogen production apparatus according to an embodiment of the present invention.

  As shown in this figure, a ceramic cylindrical electrochemical cell 1 is fixed to a cell support plate 15 of a unit container 2. An insulating seal 7 is interposed between the cylindrical electrochemical cell 1 and the cell support plate 15. The water vapor introduction pipe 6 is fixed to the water vapor introduction pipe support plate 16 of the unit container 2. The upper part of the water vapor introducing pipe 6 is inserted into the pipe of the ceramic cylindrical electrochemical cell 1.

  A hydrogen electrode feeding part 12 is provided so that the hydrogen electrode 9 on the inner surface of the ceramic cylindrical electrochemical cell 1 is used as a cathode. Further, an oxygen electrode power feeding section 13 is provided so that the oxygen electrode 11 on the outer surface of the ceramic cylindrical electrochemical cell 1 is used as an anode.

  The above-described ceramic cylindrical electrochemical cell 1, cell support plate 15, water vapor introduction tube support plate 16, water vapor introduction tube 6, hydrogen electrode 9, oxygen electrode 11, hydrogen electrode power supply unit 12 and oxygen electrode power supply unit 13 are unit. A high-temperature steam electrolysis unit, which is a hydrogen production apparatus, is housed in the container 2.

  The unit container 2 is partitioned by a water vapor introduction pipe support plate 16 to constitute a water vapor supply unit 3. The unit container 2 is partitioned by the cell support plate 15 to constitute the product oxygen outlet portion 5. Further, the product hydrogen outlet portion 4 is configured by being partitioned by the water vapor introduction pipe support plate 16 and the cell support plate 15.

  A ceramic cylindrical electrochemical cell 1 is formed of a hydrogen electrode 9, an oxygen electrode 11, and an electrolyte 10. The inner layer that is the hydrogen electrode 9 is provided outside the base tube 8. The oxygen electrode 11 forms an outer layer. An electrolyte 10 is formed between the hydrogen electrode 9 and the oxygen electrode 11.

  In the present embodiment configured as described above, the unit container 2 keeps the separation between the outside air and the water vapor 31, oxygen 30 and hydrogen 29 in the unit container 2 and the pressure in the unit container 2. The cell support plate 15 supports the cylindrical electrochemical cell 1 and further isolates oxygen 30 and hydrogen 29 generated by decomposing water vapor 31. The water vapor introduction pipe support plate 16 supports the water vapor introduction pipe 6 that introduces the water vapor 31 introduced into the unit container 2 to the cylindrical electrochemical cell 1. Water vapor 31 is supplied to the hydrogen electrode 9 on the inner surface of the cylindrical electrochemical cell 1 through the water vapor introduction pipe 6.

  Further, the hydrogen electrode 9 is made a cathode by supplying power from the hydrogen electrode power supply unit 12. Further, by supplying power from the oxygen electrode power supply unit 13, the oxygen electrode 11 is made an anode. Thus, by supplying power from the hydrogen electrode power supply unit 12 and the oxygen electrode power supply unit 13, the water vapor 31 is decomposed into oxygen ions and hydrogen 29 at the hydrogen electrode 9. The decomposed oxygen ions pass through the electrolyte 10. In the oxygen electrode 11, the transmitted oxygen ions are oxidized to oxygen 30. As described above, the high-temperature steam electrolysis unit has a function of producing hydrogen 29 and oxygen 30 by being supplied with steam 31 and electricity.

  FIG. 2 is a perspective view showing an overall image in which eight cylindrical electrochemical cells of FIG. Here, although the example which installed eight cylindrical electrochemical cells 1 is shown, it is not limited to this number. The ceramic cylindrical electrochemical cell 1 is connected to an upper pipe 23 and a lower pipe 24 in a vertical direction via a connection fitting 25 and is installed on a pedestal 22. As for the connection part of the connection metal fitting 25 connected to the cylindrical electrochemical cell 1, the upper piping 23, and the lower piping 24, it is desirable to process and fix the screw to the upper piping 23 and the lower piping 24, for example. The fastening of the upper pipe 23 and the lower pipe 24 with screws will be described later.

  Further, when the upper pipe 23 and the lower pipe 24 are connected to the cylindrical electrochemical cell 1, there is a possibility that residual stress remains when the screw is tightened. This residual stress may damage the cylindrical electrochemical cell 1. Moreover, when performing hydrogen production, since it heats up, there exists a possibility that the cylindrical electrochemical cell 1 may be damaged by thermal expansion. As a countermeasure, one or both of the upper pipe 23 and the lower pipe 24 are wound in a coil shape to provide a flexible structure that releases residual stress and thermal expansion.

  According to the present embodiment, the cylindrical electrochemical cell 1 is unitized by fixing the upper pipe 23 and the lower pipe 24 of the cylindrical electrochemical cell 1 and installing the cylindrical electrochemical cell 1 on the base 22. It can be easily stored in the container 2. Further, by winding the upper pipe 23 or the lower pipe 24 in a coil shape, it is possible to greatly reduce the damage of the cylindrical electrochemical cell 1 due to the influence of thermal expansion when heated.

  FIG. 3 is a longitudinal sectional view showing a basic structure of a connection state between the cylindrical electrochemical cell 1 and the connection fitting 25 of FIG. This cylindrical electrochemical cell 1 is mainly made of ceramics. The connection fitting 25 is made of metal and is larger than the outer diameter of the ceramic cylindrical electrochemical cell 1. The connection fitting 25 has a structure in which the cylindrical electrochemical cell 1 can be inserted. Moreover, the connection part of the connection metal fitting 25 connected to the cylindrical electrochemical cell 1 and the lower piping 24 is fastened with a screw. A male screw is processed at one end of the lower pipe 24. A tightening nut 32 in which a female screw is processed is attached to the outside of the pipe 24. A seal member 33 is inserted inside the tightening nut 32.

  In the present embodiment configured as described above, the ceramic cylindrical electrochemical cell 1 is inserted into the connection fitting 25, and the connection portion is connected using glass welding or an inorganic adhesive. Further, the sealing member 33 is bitten between the connection fitting 25 and the lower pipe 24 by tightening the tightening nut 32 to the end of the lower pipe 24.

  According to the present embodiment, since the ceramic cylindrical electrochemical cell 1 is inserted and connected to the connection fitting 25, the lower end of the ceramic cylindrical electrochemical cell 1 can be made to have a strong structure. it can. Further, by tightening the tightening nut 32 provided outside the lower pipe 24, the seal member 33 can be bitten between the connection fitting 25 and the lower pipe 24 to maintain the sealing performance even at high temperatures. it can.

  FIG. 4 is a perspective view showing a connection state of the cylindrical electrochemical cell 1 of FIG. 1 with the hydrogen electrode feeding rod 20 and the oxygen electrode feeding rod 21.

  The hydrogen electrode feed rod 20 and the ceramic cylindrical electrochemical cell 1 are connected by a hydrogen electrode feed line 17 drawn from the hydrogen electrode 9 (see also FIG. 1) of the cylindrical electrochemical cell 1. The hydrogen electrode power supply line 17 is fastened to the hydrogen electrode power supply rod 20 with a screw 26. On the other hand, the oxygen electrode feed rod 21 and the ceramic cylindrical electrochemical cell 1 are connected by an oxygen electrode feed line 19 drawn from the oxygen electrode 11 (see also FIG. 2) of the cylindrical electrochemical cell 1. The oxygen electrode power supply line 19 is fastened to the oxygen electrode power supply rod 21 with a screw 27. The hydrogen electrode feeding rod 20 and the oxygen electrode feeding rod 21 are alternately installed in the circumferential direction of the pedestal 22 (see FIG. 2). An insulating material 28 is interposed between the hydrogen electrode power supply rod 20 and the oxygen electrode power supply rod 21. Due to the presence of the insulating material 28, the hydrogen electrode power supply rod 20 and the oxygen electrode power supply rod 21 are reliably insulated.

  According to the present embodiment, the plurality of hydrogen electrode feed rods 20 and oxygen electrode feed rods 21 are alternately arranged in the circumferential direction on the upper surface of the base 22. The hydrogen electrode feed line 17 is fastened to the hydrogen electrode feed rod 20 by a screw 26, and the oxygen electrode feed line 19 is fastened to the oxygen electrode feed rod 21 by a screw 27. In this way, the connection between the power supply line and the power supply rod is ensured, the contact resistance of the connection portion is reduced, and the loss of electrical energy can be reduced. Thus, power can be easily and reliably supplied to the ceramic cylindrical electrochemical cell 1, and the supplied amount of electricity can be efficiently used for electrolysis, thereby greatly improving hydrogen production efficiency. Furthermore, since the insulating material 28 is interposed between the hydrogen electrode power supply rod 20 and the oxygen electrode power supply rod 21, the insulation between the hydrogen electrode 9 and the oxygen electrode 11 can be reliably ensured.

  FIG. 5 is a perspective view showing a fixing portion of the belt-like feeder line 34 in the hydrogen electrode 9 of the cylindrical electrochemical cell 1 of FIG.

  This figure relates to the power feeding portion of the hydrogen electrode 9 of the ceramic cylindrical electrochemical cell 1 of FIG. 1, and the fixing of the base tube 8 of the ceramic cylindrical electrochemical cell 1 and the metal belt-shaped feeding line 34. Indicates the state. The belt-like feeder line 34 is formed so as to be wound around the outer peripheral surface of the base tube 8 of the ceramic cylindrical electrochemical cell 1. As the metal strip-like feeder 34, a metal that is stable even at high temperatures and excellent in electrical conductivity is preferable, and copper, stainless steel, platinum, silver, or the like can be given as an example. A metal belt-like power feeding plate can be used instead of the metal belt-like power feeding wire 34.

  The hydrogen electrode power supply line 17 is attached to the end of the wound belt-shaped power supply line 34. A portion where the end of the belt-like power supply line 34 overlaps with the hydrogen electrode power supply line 17 is brought into close contact with the substrate tube 8 of the ceramic cylindrical electrochemical cell 1 through spot welding, screwing or twisting. A conductive paste such as a platinum paste or a silver paste may be applied to the adhesion surface in order to ensure adhesion to the adhesion surface between the base tube 8 and the belt-like feeder line 34.

  According to the present embodiment, the metal belt-like feeder line 34 is wound around the base tube 8 of the ceramic cylindrical electrochemical cell 1 so as to be in close contact with the base tube 8 of the ceramic cylindrical electrochemical cell 1. . With this configuration, the connection between the belt-like feeder line 34 and the base tube 8 of the ceramic cylindrical electrochemical cell 1 is ensured. In this way, the contact resistance at the connection between the metal belt-like feeder line 34 and the ceramic cylindrical electrochemical cell 1 is reduced. Thus, the loss of electric energy is reduced, the supplied amount of electricity is efficiently used for electrolysis, and the hydrogen production efficiency can be greatly improved.

  FIG. 6 is a perspective view showing a fixing portion of the power feeding component 18 in the oxygen electrode 11 of the cylindrical electrochemical cell of FIG.

  This figure relates to the power feeding portion of the oxygen electrode 11 of the ceramic cylindrical electrochemical cell 1 of FIG. 1 and shows a fixed state of the power feeding component 18 of the ceramic cylindrical electrochemical cell 1. As the power supply component 18, a metal expanded metal excellent in electrical conductivity is suitable. This expanded metal is produced from copper, stainless steel, platinum, silver or the like. A conductive paste such as a platinum paste or a silver paste is thinly and uniformly applied to the surface of the power supply component 18 made of metal such as copper, stainless steel, platinum, or silver so as not to block the expanded metal mesh.

  According to the present embodiment, the power feeding component 18 made of a metal expanded metal and the ceramic cylindrical electrochemical cell 1 can be connected uniformly and reliably. The contact resistance at the connection portion of the oxygen electrode 11 is reduced, and the loss of electrical energy can be greatly reduced. Thus, the supplied amount of electricity is efficiently used for electrolysis, and the hydrogen production efficiency can be greatly improved. Furthermore, by using an expanded metal as the power feeding component 18, the oxygen 30 generated on the surface of the oxygen electrode 11 can be released efficiently.

  FIG. 7 is a perspective view showing a fixing portion of the belt-like feeder line 35 in the oxygen electrode 11 of the cylindrical electrochemical cell 1 of FIG.

  This figure shows a fixed state of the power feeding component 18 made of the expanded metal of the cylindrical electrochemical cell 1 and the belt-shaped power supply line 35 in the oxygen electrode 11 of the ceramic cylindrical electrochemical cell 1 of FIG. ing. The strip-shaped power supply line 35 is formed so as to be wound around the outer periphery of the power supply component 18 wound around the cylindrical electrochemical cell 1 made of ceramics. As a material for the belt-like feeder line 35, a metal that is stable even at high temperatures and excellent in electrical conductivity is preferable, and examples thereof include copper, stainless steel, platinum, and silver. A belt-like feeder wire 35 made of metal such as copper, stainless steel, platinum or silver is wound around a feeder component 18 made of expanded metal of the cylindrical electrochemical cell 1, and the belt-like feeder wire 35 and the belt-like feeder wire 35 are overlapped. This portion is fixed to a ceramic cylindrical electrochemical cell 1 by spot welding, screws or torsion. Note that a metal belt-shaped power feeding plate can be used in place of the metal belt-shaped power feeding wire 35.

  The oxygen electrode power supply line 19 is attached to the end of the wound belt-shaped power supply line 35. A portion where the end of the belt-like power supply line 35 overlaps with the oxygen electrode power supply line 19 is brought into close contact with the ceramic cylindrical electrochemical cell 1 through spot welding, screwing or twisting.

  A conductive paste such as platinum paste or silver paste may be applied to the adhesion surface in order to ensure adhesion to the adhesion surfaces of the oxygen electrode 11, the power supply component 18, and the belt-shaped power supply line 35.

  According to the present embodiment, the connection between the oxygen electrode feeding line 19 and the oxygen electrode of the ceramic cylindrical electrochemical cell 1 is ensured, and the contact resistance of the connecting portion can be reduced. Thus, the loss of electric energy is reduced, the supplied amount of electricity is efficiently used for electrolysis, and the hydrogen production efficiency can be improved.

  In addition, when a feeder is attached to the ceramic cylindrical electrochemical cell 1, the possibility of damaging the cylindrical electrochemical cell 1 or causing poor contact is greatly reduced because there is no wrapping by hand. Is done.

  Further, in the cylindrical electrochemical cell 1, since the welding is not performed when the cylindrical electrochemical cell 1 is fixed to the pedestal 22, the cylindrical electrochemical cell 1 can be easily installed in the unit container 2. In addition, there is no possibility of affecting the performance depending on the worker to install. The connection between the hydrogen electrode feed line 17 and the oxygen electrode feed line 19 and the hydrogen electrode 9 and the oxygen electrode 11 of the ceramic cylindrical electrochemical cell 1 is ensured, the contact resistance of the connection portion is reduced, and the loss of electrical energy is reduced. The amount of electricity supplied can be efficiently used for electrolysis, and hydrogen production efficiency can be increased. In addition, in the oxygen electrode 11, the connection between the power supply component 18 made of a metal expanded metal and the belt-shaped power supply line 35 can be performed uniformly and reliably. In this way, the contact resistance of the connecting portion in the oxygen electrode 11 is reduced, and the loss of electrical energy can be reduced. Thus, the amount of electricity supplied can be efficiently used for electrolysis, and hydrogen production efficiency can be increased. In addition, by using the power supply component 18 made of expanded metal, the oxygen 30 generated on the surface of the oxygen electrode 11 can be efficiently released. Furthermore, the setting of the cylindrical electrochemical cell 1 can be performed easily and reliably, and the damage of the cylindrical electrochemical cell 1 due to the influence of thermal expansion when energized and heated can be greatly reduced.

  Furthermore, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention by combining the embodiments of the present invention. it can.

The longitudinal cross-sectional view which shows the basic composition of the hydrogen production apparatus of embodiment of this invention. The perspective view which shows the whole image which installed eight cylindrical electrochemical cells of FIG. 1 in the base. The longitudinal cross-sectional view which shows the basic structure of the connection state of the cylindrical electrochemical cell of FIG. 1, and a connection metal fitting. The perspective view which shows the connection state of the cylindrical electrochemical cell of FIG. 1, a hydrogen electrode feed rod, and an oxygen electrode feed rod. The perspective view which shows the fixing | fixed part of the strip | belt-shaped feeder in the hydrogen electrode of the cylindrical electrochemical cell of FIG. The perspective view which shows the fixing | fixed part of the electric power feeding component in the oxygen electrode of the cylindrical electrochemical cell of FIG. The perspective view which shows the fixing | fixed part of the strip | belt-shaped electric power feeding line in the oxygen electrode of the cylindrical electrochemical cell of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Cylindrical electrochemical cell, 2 ... Unit container, 3 ... Steam supply part, 4 ... Product hydrogen outlet part, 5 ... Product oxygen outlet part, 6 ... Steam introduction pipe, 7 ... Insulation seal, 8 ... Base | substrate pipe | tube, 9 DESCRIPTION OF SYMBOLS ... Hydrogen electrode, 10 ... Electrolyte, 11 ... Oxygen electrode, 12 ... Hydrogen electrode feed part, 13 ... Oxygen electrode feed part, 15 ... Cell support plate, 16 ... Water vapor introduction pipe support plate, 17 ... Hydrogen electrode feed line, 18 ... Power feeding component, 19 ... oxygen electrode feeding line, 20 ... hydrogen electrode feeding rod, 21 ... oxygen electrode feeding rod, 22 ... pedestal, 23 ... upper piping, 24 ... lower piping, 25 ... connection fitting, 26, 27 ... screw, 28 DESCRIPTION OF SYMBOLS ... Insulating material, 29 ... Hydrogen, 30 ... Oxygen, 31 ... Water vapor, 32 ... Clamping nut, 33 ... Seal member, 34, 35 ... Strip | belt-shaped electric power feeding line.

Claims (10)

A plurality of ceramic cylindrical electrochemical cells;
A water vapor introducing tube for introducing water vapor into the tube of the cylindrical electrochemical cell;
A hydrogen electrode power feeding section that feeds a hydrogen electrode on the inner surface of the cylindrical electrochemical cell to form a cathode;
An oxygen electrode power feeding section that feeds an oxygen electrode on the outer surface of the cylindrical electrochemical cell to serve as an anode;
A unit container for housing the cylindrical electrochemical cell, the water vapor introduction pipe, the hydrogen electrode power supply unit and the oxygen electrode power supply unit;
A pedestal provided in the unit container;
With
Installing the cylindrical electrochemical cell on the pedestal by fixing the upper pipe connected to the upper part of the cylindrical electrochemical cell and the lower pipe connected to the lower part thereof, respectively.
A hydrogen production apparatus characterized by   The hydrogen production apparatus according to claim 1, wherein at least one of the upper pipe and the lower pipe is formed in a coil shape.   The hydrogen electrode power supply section includes a hydrogen electrode power supply rod that supplies power to the hydrogen electrode, and the oxygen electrode power supply section includes an oxygen electrode power supply rod that supplies power to the oxygen electrode, the hydrogen electrode power supply rod, the oxygen electrode power supply rod, The hydrogen production apparatus according to claim 1, wherein are installed alternately in a circumferential direction of the pedestal.   The hydrogen production apparatus according to claim 1, wherein the hydrogen electrode feed rod is fastened to a hydrogen electrode feed line with a screw, and the oxygen electrode feed rod is fastened to an oxygen electrode feed line with a screw.   2. The hydrogen production apparatus according to claim 1, wherein the hydrogen electrode power feeding unit includes a metal belt-shaped power feeding plate or a metal belt-shaped power feeding wire provided on the hydrogen electrode of the cylindrical electrochemical cell. .   The hydrogen production apparatus according to claim 5, wherein a conductive paste is applied to an adhesive surface of at least one of the hydrogen electrode, the belt-shaped power feeding plate, and the belt-shaped power feeding line.   2. The hydrogen production according to claim 1, wherein the oxygen electrode power supply unit includes a power supply component made of a metal expanded metal wound around an outer peripheral surface of the oxygen electrode of the cylindrical electrochemical cell. apparatus.   The hydrogen production apparatus according to claim 7, wherein the oxygen electrode power feeding unit includes a metal belt-shaped power feeding plate or a metal belt-shaped power feeding wire wound around an outer peripheral surface of the power feeding component.   9. The hydrogen production apparatus according to claim 7, wherein a conductive paste is applied to an outer surface of the oxygen electrode, the power supply component, the belt-shaped power supply plate, and / or the adhesive surface of the belt-shaped power supply line. . A water vapor introducing tube for introducing water vapor into the tube of the cylindrical electrochemical cell, a hydrogen electrode power feeding portion that feeds the hydrogen electrode on the inner surface of the cylindrical electrochemical cell to form a cathode, and the cylindrical electrochemical cell An oxygen electrode power feeding part that feeds the oxygen electrode on the outer surface to be an anode;
A cylindrical electrochemical cell assembling step for assembling the cylindrical electrochemical cell;
A pedestal installation step for installing a pedestal in the unit container;
The cylindrical electrochemical cell is placed on the pedestal by fixing the upper pipe connected to the upper part of the cylindrical electrochemical cell and the lower pipe connected to the lower part thereof, and the cylindrical electrochemical cell is placed on the pedestal. A cylindrical electrochemical cell storage step for storing in a unit container;
A method for assembling a hydrogen production apparatus, comprising:

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