JP2015102514A - Hydrogen removal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydrogen removal device capable of reducing an increase in pressure loss resulting from the expansion of a reaction material after reacting with hydrogen.SOLUTION: A hydrogen removal device 10A is a hydrogen removal device for a nuclear reactor containment vessel, introducing treatment target gas from an intake part 14 to an inside, removing hydrogen contained in the gas, and discharging the hydrogen-removed gas from an exhaust part 16 to an outside, includes a hydrogen removal unit 11 making the gas permeable to cause the gas to react with reaction material pieces, oxidizing hydrogen contained in the gas, and removing the hydrogen. The hydrogen removal unit 11 is configured so that a plurality of modules 20A including cells in each of which the reaction material pieces are stored in a container that can be permeated by the gas and which are coupled together in a direction of the permeation, is arranged in a direction in which the gas passes through the modules and flows from the intake part 14 to the exhaust part 16, and that an expansion absorption region absorbing expansion if the reaction material pieces expand is provided on the cells.

Description

  Embodiments described herein relate generally to a hydrogen removal apparatus that removes hydrogen contained in a gas.

  In a nuclear power plant, a reactor pressure vessel that houses a reactor core is stored in a reactor containment vessel. The reactor containment vessel has an upper dry well and a lower dry well that surround the reactor pressure vessel, and a wet well with a suppression pool that is connected to the upper dry well via a vent pipe and stores water inside. Has been. In addition, a biological shielding wall is installed surrounding the reactor pressure vessel.

  In the reactor containment vessel configured as described above, when a nuclear accident occurs, hydrogen is generated in the reactor containment vessel. For example, if the main steam pipe connected to the reactor pressure vessel breaks, high temperature and high pressure reactor primary coolant (water) is discharged into the upper dry well in the reactor containment vessel, and the upper dry tube The pressure and temperature in the well rise rapidly.

  It mixes with the gas in the upper dry well and is absorbed in the suppression pool through the vent tube. The reactor pressure vessel is filled with water from the suppression pool by the emergency core cooling system to cool the core, but this cooling water absorbs the decay heat from the core for a long time and It flows out from the break opening to the dry well. For this reason, the pressure and temperature in the upper dry well are always higher than the wet well.

  Under such a long-term event, in the reactor of a light water reactor type nuclear power plant, water as a coolant is radioactively decomposed to generate hydrogen gas and oxygen gas. Further, when the temperature of the fuel cladding tube rises, a reaction (Metal-Water reaction) occurs between the water vapor and the zirconium of the fuel cladding tube material, and hydrogen gas is generated in a short time.

  The hydrogen gas generated in this way is discharged into the reactor containment vessel from the fractured port of the broken pipe, and the hydrogen gas concentration in the reactor containment vessel gradually increases. Moreover, since hydrogen gas is non-condensable, the pressure in the reactor containment vessel also increases.

  For such a situation where hydrogen gas is generated and the hydrogen concentration in the reactor containment vessel increases, no effective measures can be taken and the hydrogen gas concentration is increased to 4 vol% and the oxygen concentration is increased to 5 vol% or more. If it rises, that is, if the flammable gas concentration exceeds the flammable limit, the gas becomes flammable. Furthermore, when the hydrogen gas concentration increases, there is a possibility that an excessive reaction occurs.

  For example, in the case of a conventional boiling water nuclear power generation facility, an effective measure for preventing a situation where hydrogen gas, which is a flammable gas, becomes a flammable state, It may be replaced with gas to keep the oxygen concentration low. By introducing equipment that can implement such measures, the reactor containment vessel is prevented from becoming a flammable atmosphere even for hydrogen gas generated in large quantities in a short time by the Metal-Water reaction. Inherent safety is achieved.

  Another countermeasure example is to install a combustible gas concentration suppressing device having a recombiner and a blower outside the reactor containment vessel. The flammable gas concentration suppression device sucks the gas in the reactor containment vessel out of the reactor containment vessel, raises the temperature, recombines hydrogen gas and oxygen gas, returns them to water, and cools the remaining gas. Is a device that operates to return to the reactor containment. By installing the combustible gas concentration suppressing device that operates in this manner, an increase in the combustible gas concentration in the reactor containment vessel is suppressed.

  Furthermore, as another countermeasure example different from the above countermeasure (apparatus), an apparatus that statically suppresses the combustible gas concentration without requiring an external power supply has been proposed. As an example of a technique for statically reducing the concentration of combustible gas without requiring an external power source, for example, a plurality of catalytic recombination devices that promote a recombination reaction using a hydrogen oxidation catalyst are contained in a reactor containment vessel. There is technology to install.

JP 2005-3371 A

  Under the event that a large amount of hydrogen is generated by the Metal-Water reaction, it is difficult to remove hydrogen in a low oxygen state by the above-described conventional hydrogen treatment technique by recombination of hydrogen and oxygen. When hydrogen cannot be removed, the pressure in the containment vessel cannot be reduced, and it becomes difficult to lead the accident to convergence. In this case, the current system is planned to release the atmosphere in the containment vessel to reduce the pressure in the containment vessel and converge the accident, but at the same time there is a considerable risk of releasing radioactive waste into the environment. Will bear.

  Therefore, as a technique for removing hydrogen even in an environment where oxygen concentration is low and recombination is difficult, a technique using a metal peroxide as a reaction material has been proposed. In a hydrogen removal apparatus to which the technology is applied, for example, a metal peroxide having a particle size of about several millimeters (millimeters) is filled in a flow path module and installed in the apparatus, and gas is passed through the gas in the gas. The hydrogen is removed by reacting with hydrogen.

  However, when employing a technology that uses such a metal peroxide as a reaction material, the volume of the metal peroxide expands when it reacts with hydrogen, eliminating the gaps between the reaction material particles and increasing the internal pressure loss. There is a problem to make.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a hydrogen removal apparatus in which an increase in pressure loss due to the reaction material expanding by reaction with hydrogen is reduced.

  In order to solve the above-described problem, a hydrogen removal apparatus according to an embodiment of the present invention introduces a gas to be processed into the inside from an intake portion, and removes the gas contained in the gas by oxidizing the gas. In a hydrogen removal apparatus for a nuclear reactor containment vessel that exhausts to the outside from an exhaust section, a hydrogen removal section that causes the gas to flow and reacts the gas with a metal oxide to oxidize and remove hydrogen contained in the gas. The hydrogen removal unit includes a module in which cells containing the metal oxide are connected in series in a direction of ventilation in a container capable of venting the gas, and the gas passes through the module. A plurality of arrangements are arranged in a direction to pass through and vent from the intake part to the exhaust part, and an expansion absorption region is provided in the upper part of the cell to absorb the expansion when the metal oxide expands. It is characterized in that is.

  According to the embodiment of the present invention, it is possible to reduce an increase in pressure loss due to the reaction material expanding by reacting with hydrogen.

Sectional drawing of the hydrogen removal apparatus which concerns on the 1st Embodiment of this invention. It is explanatory drawing explaining the reaction material module which comprises the hydrogen removal part of the hydrogen removal apparatus which concerns on embodiment of this invention, (A) is a longitudinal cross-sectional view of the container of the cell which comprises a reaction material module, (B) II (B) -II (B) sectional view of the container, (C) is a sectional view of the container taken along line II (C) -II (C), (D) is a longitudinal sectional view of the reaction material module, and (E) is II (E) -II (E) line sectional drawing of a reaction material module. Explanatory drawing explaining the installation method of the reaction material module as a hydrogen removal part of the hydrogen removal apparatus which concerns on embodiment of this invention. It is the schematic of the reaction material module applied in the hydrogen removal apparatus which concerns on the 2nd Embodiment of this invention, (A) is a longitudinal cross-sectional view, (B) is IV (B) -IV (B) sectional view taken on the line. . It is the schematic of the reaction material module applied in the hydrogen removal apparatus which concerns on the 3rd Embodiment of this invention, (A) is a longitudinal cross-sectional view, (B) is a V (B) -V (B) sectional view taken on the line. . Sectional drawing of the hydrogen removal apparatus which concerns on the 4th Embodiment of this invention. Sectional drawing explaining the structure of the hydrogen removal apparatus which concerns on the 5th Embodiment of this invention. It is the schematic of the reaction material module applied in the hydrogen removal apparatus which concerns on the 5th Embodiment of this invention, (A) is a longitudinal cross-sectional view of a reaction material module, (B) is a side view of a reaction material module. It is the schematic of the reaction material module applied in the hydrogen removal apparatus which concerns on the 6th Embodiment of this invention, (A) is a longitudinal cross-sectional view of a reaction material module, (B) is a side view of a reaction material module. It is the schematic of the reaction material module applied in the hydrogen removal apparatus which concerns on the 7th Embodiment of this invention, (A) is a side view of the container of the cell which comprises a reaction material module, (B) is a vertical section of a container A top view and (C) are longitudinal cross-sectional views of a reaction material module.

  A hydrogen removal apparatus according to an embodiment of the present invention will be described with reference to the drawings. In the following description, an example will be described in which the hydrogen removal apparatus according to each embodiment of the present invention is installed inside a reactor containment vessel and is applied when removing hydrogen from the atmosphere of the reactor containment vessel. Further, in the following description, words indicating directions such as up, down, left, and right are based on the illustrated state or the normal use state.

[First Embodiment]
FIG. 1 is a cross-sectional view of a hydrogen removal apparatus 10A which is an example of a hydrogen removal apparatus according to the first embodiment of the present invention.

  The hydrogen removing device 10A is a device including a hydrogen removing unit 11 that removes hydrogen by consuming hydrogen, and a gas containing hydrogen to be subjected to hydrogen removal treatment in a casing 12 in which the hydrogen removing unit 11 is disposed ( Hereinafter, the gas to be treated is referred to as “the gas to be treated”.) 13 is introduced from the intake portion 14, which is the first opening of the housing 12, and the hydrogen contained in the gas to be treated 13 is removed through the hydrogen removing portion 11. A gas to be processed (hereinafter referred to as “processed gas”) 15 is exhausted from an exhaust unit 16 that is a second opening of the housing 12.

  Further, in the hydrogen removing device 10 </ b> A, for example, the intake unit 14 is disposed at the lower part of the housing 12 and the exhaust unit 16 is disposed at the upper part of the housing 12, and the hydrogen removing unit 11 is interposed between the intake unit 14 and the exhaust unit 16. Is disposed. In addition, a partition plate 17 serving as a base for disposing the hydrogen removing unit 11 is installed in the horizontal direction inside the housing 12 and is airtightly fixed to the side wall of the housing 12.

The hydrogen removal unit 11 is formed, for example, by arranging a plurality of reaction material modules 20A that contain (fill) a reaction material for removing hydrogen. For the reaction material accommodated in the reaction material module 20A, a material having a higher-order oxidation number in a metal oxide that can take a plurality of oxidation numbers is selected. For example, copper oxide (CuO), manganese peroxide (Mn) _n O _m ), metal oxides such as cobalt oxide (Co _n O _m ), metal peroxides that are salts composed of peroxide ions (O ₂ ²⁻ ) and metal, and the like can be applied. . Even when a metal oxide is used as the reaction material, water (H ₂ O) can be generated by combining O and hydrogen gas contained in the metal oxide, and hydrogen can be removed.

  The partition plate 17 is provided with a plurality of hole portions 17a constituted by through holes provided with ribs. The hole 17a provides a recess for fitting the reaction material module 20A constituting the hydrogen removing unit 11 and allows the gas 13 to be treated introduced into the housing 12 to pass through the hole 17a of the partition plate 17. Guidance (introduction) to the hydrogen removal unit 11.

  In addition, the reaction material module 20A fitted in the partition plate 17 is prevented from coming off (removing) from the hole portion 17a (recessed portion). A fixture 18 that supports the reaction material module 20A is disposed on the upper end side of the material module 20A. The fixture 18 is a structure that can be attached to and detached from the housing 12, and is composed of, for example, a plate-like body provided with a through hole 18 a.

  Next, the reaction material module 20 constituting the hydrogen removal unit 11 of the hydrogen removal apparatus 10A will be described.

  FIG. 2 is an explanatory view illustrating the configuration of the reaction material module 20 (20A to 20G) disposed in the housing 12 (FIG. 1). More specifically, FIG. 2A is a longitudinal sectional view of the container 21 (21A to 21G) of the cell 23 constituting the reaction material module 20, and FIG. 2B is a sectional view of the door 28 of the container 21 (FIG. 2). II (B) -II (B) sectional view shown in (A), FIG. 2 (C) is a sectional view of the container body 27 of the container 21 (II (C) -II shown in FIG. 2 (A). 2C is a longitudinal sectional view of the reaction material module 20, and FIG. 2E is II (E) -II (E) shown in FIG. 2D of the reaction material module 20. ) Is a cross-sectional view along the line (II (E) -II (E) cross-sectional view).

  In the reaction material module 20, cells 23 each containing a small piece of reaction material (hereinafter referred to as "reaction material piece") 22 are arranged in series in a container 21 (21A to 21G) having a hollow interior (in FIG. 2). (Up and down direction) connected. Accordingly, the reaction material module 20 enables the length adjustment in units of the cells 23 by appropriately connecting or removing the cells 23.

  In the cell 23, when the reaction material piece 22 expands, a region 24 (hereinafter referred to as “expansion absorption region”) that absorbs an increase in volume accompanying the expansion is set, and other regions (hereinafter, referred to as “expansion absorption region”). The reaction material piece 22 is densely accommodated (filled) in the “reactive material filling region”) 25.

  The expansion absorption region 24 is formed of, for example, a space or an expansion absorber that reduces the volume by receiving stress generated when the reaction material piece 22 expands. As the expansion absorber, for example, when it receives compressive stress such as a structure in which an elastic body is attached between two plates, a bellows, a telescopic tubular body such as a telescope, the compressive stress is received. There are structures that shrink (collapse) in length in the direction. In addition, a hollow container or the like that collapses in the direction of receiving the compressive stress when it receives compressive stress generated when the reaction material piece 22 expands is also included in the expansion absorber.

  When such an expansion absorber is subjected to a vertical compressive stress caused by expansion of the reaction material piece 22, the volume can be reduced by reducing the vertical length subjected to the compressive stress. The expansion of the reaction material piece 22 can be absorbed in the cell 23, and the reduction in the porosity of the reaction material piece 22 in the reaction material filling region 25 can be suppressed.

  In addition, when there is an expansion absorption region 24 on the path through which the gas to be processed 13 is vented in the cell 23 and the expansion absorption region 24 is formed of an expansion absorber, so as not to prevent the gas to be processed 13 from being vented. Ventilation portions (not shown) such as holes, lattices, or meshes are provided on a surface parallel to the direction in which the gas 13 to be treated of the expansion absorber passes.

  The container 21 is, for example, a cylindrical container having a hollow inside such as a cylinder. Gas can be passed through a part of the surface such as the upper surface and the bottom surface, and the reaction material piece 22 filled therein leaks out. A ventilation portion 26 in which an opening such as a hole, a lattice, or a mesh having a size not to be formed is provided. The container 21 is provided with a door 28 as an example of access means for accessing the inside of the container main body 27 (the space in which the reaction material piece 22 is accommodated).

  In addition, although the door 28 is provided in the upper surface in the container 21 shown in FIG. 2, as long as it can access the inside of a container main body, you may provide in surfaces other than upper surfaces, such as a bottom face and a side surface. As another example of the access means provided in the container 21, the door 28 may be a lid that can be fitted to the container body 27.

Then, an example of the method of installing the hydrogen removal part of the hydrogen removal apparatus which concerns on embodiment of this invention is demonstrated.
FIG. 3 is an explanatory diagram for explaining a method of installing a reaction material module 20A that is an example of the reaction material module 20 as the hydrogen removal unit 11 of the hydrogen removal device 10A that is an example of the hydrogen removal device according to the embodiment of the present invention. It is.

  In the hydrogen removal apparatus 10A, first, the reaction material module 20A is prepared, and then the reaction material module 20 is disposed on the upper surface of the partition plate 17 in the hole 17a from above. When the reaction material modules 20 are disposed in all the holes 17a, finally, a fixture 18 (FIG. 1) that supports the reaction material modules 20 is disposed and fixed to the housing 12.

  In addition, what is necessary is just to perform in the reverse procedure to the case where it installs, when removing the reaction material module 20A. That is, the fixing plate 18 (FIG. 1) may be removed from the housing 12 and lifted, and then the reaction material module 20A may be lifted and pulled out (removed) from the partition plate 17.

  In the hydrogen removing apparatus 10A configured as described above (FIG. 1), first, the gas 13 to be treated flows into the apparatus (inside the casing 12) from the intake section 14 disposed in the lower part of the casing 12 (intake air). ) When the gas 13 to be treated is introduced into the casing 12, hydrogen has a specific gravity that is lighter than other gases and naturally rises. Therefore, the hydrogen contained in the gas 13 to be inhaled from the lower portion of the casing 12 is In the ascending process, it passes through the hole 17a and is introduced into the hydrogen removing unit 11 in which a plurality of the reactant modules 20A are arranged.

  In the hydrogen removal unit 11, an oxidation reaction occurs (oxidizes) with the reaction material piece 22 (FIG. 2) accommodated in the reaction material module 20 </ b> A in the process in which hydrogen contained in the gas 13 to be processed passes through the hydrogen removal unit 11. ) Change to water. That is, hydrogen contained in the gas to be processed 13 is consumed (removed). The treated gas 15 from which hydrogen has been removed from the gas to be treated 13 after passing through the hydrogen removing unit 11 rises further and flows out (exhaust) from the exhaust unit 16 disposed on the upper portion of the housing 12.

  Next, a hydrogen removal method (hereinafter referred to as “first hydrogen removal method”) performed using the hydrogen removal apparatus according to the first embodiment of the present invention will be described with reference to FIGS. .

  The first hydrogen removal method is performed using, for example, the hydrogen removal apparatus 10A. The first hydrogen removal method includes a hydrogen removal step in which the gas to be treated 13 is led to the hydrogen removal unit 11 including the reaction material module 20A in the hydrogen removal apparatus 10A, and the hydrogen removal unit 11 removes (consumes) hydrogen. .

  In the first hydrogen removal method of removing hydrogen from the atmosphere inside the reactor containment vessel using the hydrogen removal apparatus 10A, the temperature of the fuel cladding tube rises due to some cause, and is water vapor and fuel cladding tube material. A reaction (Metal-Water reaction) occurs with zirconium to generate hydrogen, which leaks from the reactor pressure vessel together with a large amount of steam. When a large amount of generated steam and hydrogen leak from the reactor pressure vessel into the reactor containment vessel, the atmosphere in the reactor containment vessel flows into the hydrogen removal apparatus 10 </ b> A from the intake portion 14 as the gas 13 to be processed.

  The gas (hydrogen and water vapor) that has flowed into the hydrogen removal apparatus 10A changes from hydrogen to water by reacting with the reaction material pieces 22 such as metal peroxide filled in the reaction material module 20A. When using a metal peroxide as a reaction material, the volume of the metal peroxide expands when it reacts with hydrogen, so that the reaction material piece 22 after reacting with hydrogen expands.

  In the reaction material module 20A, since the expansion absorption region 24 is provided in the upper part of each cell 23, even if the reaction material piece 22 expands and the reaction material filling region 25 expands, the expansion absorption region 24 expands to that extent. Absorb. Therefore, in the reaction material module 20A, even when the reaction material piece 22 expands, the porosity of the filled reaction material piece 22 does not decrease, and the gas 13 to be processed (or the processed gas 15) passes (vents). The pressure loss does not increase.

  On the other hand, the treated gas 15 from which hydrogen has been removed through the hydrogen removing section 11 in which a plurality of the reactant modules 20A are disposed further rises and flows out from the exhaust section 16 disposed in the upper part of the housing 12. (Exhaust).

  According to the hydrogen removing apparatus 10A and the first hydrogen removing method, for example, when the reaction material piece 22 is a small piece of metal peroxide and the reaction material piece 22 is used, Even if the volume expands due to the reaction, the expansion absorption region 24 absorbs the expansion, so the porosity of the reaction material piece 22 does not decrease, and the pressure loss when the gas 13 to be processed passes (vents). An increase can be prevented. Moreover, since the reaction material module 20A comprised by connecting the some cell 23 as the hydrogen removal part 11 is employ | adopted, installation and removal of the hydrogen removal part 11 can be performed comparatively easily.

[Second Embodiment]
The hydrogen removal apparatus according to the second embodiment of the present invention is different from the hydrogen removal apparatus according to the first embodiment of the present invention in that the configuration of the reaction material module disposed is different. This point is not substantially different. That is, in the cross-sectional view of the hydrogen removal apparatus 10B which is an example of the hydrogen removal apparatus according to the second embodiment of the present invention, the reference numerals 10A and 20A shown in FIG. 1 are replaced with the reference numerals 10B and 20B. Therefore, in the description of the present embodiment, the description will focus on the reaction material module 20B, which is a difference between the hydrogen removal apparatus 10B and the hydrogen removal apparatus 10A, and a description of the contents overlapping with the description of the above-described embodiment will be omitted.

  FIG. 4 is a schematic diagram of a reaction material module 20B applied in a hydrogen removal apparatus 10B (in FIG. 1, the reference numeral 10A is replaced with 10B) which is an example of the hydrogen removal apparatus according to the second embodiment of the present invention. 4 (A) is a longitudinal sectional view of the reaction material module 20B, and FIG. 4 (B) is a sectional view of the reaction material module 20B in the direction along the line IV (B) -IV (B) shown in FIG. 4 (A). IV (B) -IV (B) sectional view).

  The reaction material module 20B is placed in a container 21B provided with a bias prevention plate 31 that partitions the space in the cell 23 of the reaction material module 20B in the horizontal direction (left-right direction) with reference to the state after the reaction material module 20B is arranged. The reaction material pieces 22 are uniformly filled. That is, the container 21B is additionally provided with a bias prevention plate 31 extending in a substantially vertical direction (vertical direction) with respect to the container 21A.

  In addition, the bias prevention plate 31 may be provided with an opening that is finer (smaller) than the reaction material piece 22. If the bias prevention plate 31 having an opening smaller than the reaction material piece 22 is applied, the influence on the flow velocity distribution of the gas flowing inside the cell 23 can be further reduced.

  In the hydrogen removal device 10B in which the reaction material module 20B configured as described above is installed as the hydrogen removal unit 11 (FIG. 1), the gas 13 to be treated is introduced into the housing 12 from the intake portion 14 as in the hydrogen removal device 10A. Hydrogen is removed by the hydrogen removing unit 11 that is introduced and a plurality of the reaction material modules 20 </ b> B (FIG. 4) of the housing 12 are arranged, and becomes the treated gas 15 and is exhausted from the exhaust unit 16. Even if the reaction material module 20B as the hydrogen removal unit 11 is tilted or changed in direction at the time of installation or the like, the reaction material piece 22 is prevented from being biased by the bias prevention plate 31, and immediately after the reaction material piece 22 is accommodated. The uniform state can be maintained.

  Therefore, time for eliminating the bias when installing the reaction material module 20B becomes unnecessary. Further, even if the reaction material module 20B is installed without paying particular attention to the bias of the reaction material piece 22, the reaction material piece 22 remains in a uniform state without being biased. Operation can be prevented.

  Note that the hydrogen removal method performed using the hydrogen removal apparatus according to the second embodiment of the present invention is different from the first hydrogen removal method using the hydrogen removal apparatus 10A in that the apparatus to be used is replaced with the hydrogen removal apparatus 10A. However, the process is substantially the same, although it is different in that it becomes the hydrogen removing device 10B. Accordingly, the description of the first hydrogen removal method performed using the hydrogen removal apparatus 10A is omitted, and the description of the second hydrogen removal method performed using the hydrogen removal apparatus 10B is omitted.

  According to the hydrogen removal apparatus 10B and the second hydrogen removal method, the same effects as those of the hydrogen removal apparatus 10A and the first hydrogen removal method can be obtained. Furthermore, in the hydrogen removal apparatus 10B and the second hydrogen removal method, when the reaction material module 20B is installed, the reaction material pieces 22 inside the cell 23 are prevented from being biased by being inclined, for example, so as to be uniform. Therefore, when installing the reaction material module 20B, time for eliminating the bias is not necessary, and operation with the reaction material pieces 22 inside the cells 23 being biased can be prevented.

[Third Embodiment]
The hydrogen removal apparatus according to the third embodiment of the present invention is different from the hydrogen removal apparatus according to the first embodiment of the present invention in that the configuration of the reaction material module disposed is different. This point is not substantially different. That is, the cross-sectional view of the hydrogen removal apparatus 10C which is an example of the hydrogen removal apparatus according to the third embodiment of the present invention is obtained by replacing the reference numerals 10A and 20A shown in FIG. 1 with reference numerals 10C and 20C. Therefore, in the description of the present embodiment, the reaction material module 20C, which is a difference between the hydrogen removal apparatus 10C and the hydrogen removal apparatus 10A, will be mainly described, and the description of the content overlapping with the description of the above-described embodiment will be omitted.

  FIG. 5 is a schematic view of a reaction material module 20C applied in a hydrogen removal apparatus 10C (in FIG. 1, the reference numeral 10A is replaced with 10C) which is an example of the hydrogen removal apparatus according to the third embodiment of the present invention. 5 (A) is a longitudinal cross-sectional view of the reaction material module 20C, and FIG. 5 (B) is a cross-sectional view along the V (B) -V (B) line shown in FIG. 5 (A) of the reaction material module 20C. V (B) -V (B) line sectional view).

  When filling a container with particles and allowing gas to flow, generally, as the particle diameter increases, the porosity of particles near the wall surface inside the container increases, so that the gas easily flows near the wall surface. Therefore, when the container 21 is filled with the particulate reaction material piece 22, the porosity of the reaction material piece 22 near the inner surface of the container 21 increases, and the flow of the gas 13 to be treated when the reaction material module 20 is vented. May be biased toward the wall surface.

  Therefore, in the hydrogen removal apparatus 10C, the particulate reaction material piece 22 is accommodated in a container 21C provided with a concavo-convex portion 33 having a curved surface formed on at least a part of the inner surface of the container 21A (FIG. 2A). The reaction material module 20 </ b> C formed in this way is installed as the hydrogen removal unit 11. Note that the radius of curvature of the curved surface forming the unevenness of the uneven portion 33 is preferably about the same as the radius of the reaction material piece 22 accommodated in the container 21C, and close to the radius of the reaction material piece 22 accommodated in the container 21C. The more preferable. Here, the same degree as the radius of the reaction material piece 22 means a range of the radius ± 10% of the reaction material piece 22.

  By installing the reaction material module 20C formed by accommodating the reaction material piece 22 in the container 21C provided with the concavo-convex portion 33 as the hydrogen removal portion 11, the hydrogen removal apparatus 10C has a wall near the inner side of the reaction material module 20C. It is possible to prevent the gas to be processed 13 (or the processed gas 15) from flowing unevenly (concentrated near the inner wall surface of the reaction material module 20C).

  In the hydrogen removing apparatus 10C in which the reaction material module 20C configured as described above is installed as the hydrogen removing unit 11, the gas 13 to be treated is introduced into the casing 12 from the intake section 14 as in the hydrogen removing apparatus 10A. Hydrogen is removed by the hydrogen removing unit 11 in which a plurality of the reaction material modules 20 </ b> B of the body 12 are arranged, and the processed gas 15 is exhausted from the exhaust unit 16. In the reaction material module 20C as the hydrogen removing unit 11, the gaps at the portion where the uneven portion 33 formed on the inner surface of the container 21C is in contact with the inner surface can be reduced, and the gas to be processed 13 (or the processed gas 15). Can be made uniform.

  Note that the hydrogen removal method performed using the hydrogen removal apparatus according to the third embodiment of the present invention is a hydrogen removal method performed using the hydrogen removal apparatus according to the first embodiment of the present invention, such as the first hydrogen removal method. Although it differs from the removal method in that the apparatus to be used is a hydrogen removal apparatus 10C instead of the hydrogen removal apparatus 10A, the process is substantially the same. Therefore, the description of the third hydrogen removal method performed using the hydrogen removal apparatus 10C is omitted with the description of the first hydrogen removal method performed using the hydrogen removal apparatus 10A.

  According to the hydrogen removal device 10C and the third hydrogen removal method, the same effects as those of the hydrogen removal device 10A and the first hydrogen removal method can be obtained. Furthermore, in the hydrogen removing device 10C and the third hydrogen removing method, the gaps at the portions where the uneven portions 33 formed on the inner surface of the container 21C are in contact with the inner surface can be reduced, and the gas to be treated 13 (or the treated gas 13) The flow of gas 15) can be made more uniform.

  In addition, although the reaction material module 20C mentioned above is formed by accommodating the reaction material piece 22 in the container 21C which formed the uneven | corrugated | grooved part 33 in the inner surface of the container 21A of the reaction material module 20A, The container 21 to be stored is not necessarily limited to the container 21A. For example, instead of the container 21A, a container 21C in which an uneven portion 33 is formed on the inner surface of another container 21 such as the container 21B is prepared, and the reaction material module 22 is accommodated in the container 21C to form the reaction material module 20C. You can also.

[Fourth Embodiment]
FIG. 6 is a cross-sectional view of a hydrogen removal apparatus 10D which is an example of a hydrogen removal apparatus according to the fourth embodiment of the present invention.

  The hydrogen removal apparatus 10D is different from the hydrogen removal apparatus 10A in which a plurality of reaction material modules 20A are provided as the hydrogen removal unit 11 in that the reaction material module 20D is provided as the hydrogen removal unit 11, but the other points. Are not substantially different. Therefore, in the description of the present embodiment, the description will focus on the reaction material module 20D that is a difference with respect to the hydrogen removal apparatus 10A, and a description of the contents overlapping with the description of the above-described embodiment will be omitted.

  The hydrogen removal apparatus 10D is an apparatus including the hydrogen removal unit 11 similarly to the hydrogen removal apparatus 10A, but the configuration of the plurality of reactant modules 20 constituting the hydrogen removal unit 11 is different from the hydrogen removal apparatus 10A. To do. In the hydrogen removal apparatus 10A, the size of the reaction material piece 22 accommodated in the reaction material module 20A does not depend on the place where the reaction material module 20A is disposed, that is, the size of the reaction material piece 22 in which any reaction material module 20A is accommodated. It is about the same. On the other hand, in the hydrogen removal apparatus 10D, the size (particle diameter) of the reaction material piece 22 is changed according to the place where the reaction material module 20D is disposed.

  That is, in the hydrogen removal apparatus 10D, a plurality of types of reactive material pieces 22 (3D in the example shown in FIG. 6) having different particle diameters (22D1, 22D2, and 22D3 in the example shown in FIG. 6) are respectively stored in containers. A plurality of types of reaction material modules 20D (20D1, 20D2, and 20D3 in the example shown in FIG. 6) prepared and accommodated in 21 are prepared, and the size (particle diameter) of the reaction material pieces 22 is relatively small. Are arranged on the center side of the flow path of the gas to be processed 13 constituted by a plurality of reaction material modules 20D, and are sequentially arranged on the edge side as they become larger.

  In general, when gas is ventilated through a cylindrical container, the gas flow rate in the central part, which tends to flow relatively easily, is expected to increase, but the pressure loss in the central part, where the gas flow rate is expected to increase, is expected. This is because the deviation of the gas flow rate is eliminated by increasing the ratio as compared with the peripheral portion at the center. In other words, the flow of the gas 13 to be processed (or the processed gas 15) is increased by increasing the pressure loss of the central portion where the gas 13 to be processed (or the processed gas 15) is relatively easy to flow compared to the peripheral portion. This is because it can be made more uniform.

For example, the hydrogen removal apparatus 10D shown in FIG. 6 accommodates reaction material pieces 22D1, 22D2, and 22D3 having particle diameters r ₁ , r ₂ , and r ₃ (0 <r ₁ <r ₂ <r ₃ ), respectively. Cells 23D1, 23D2, and 23D3 are prepared, and the cells 23D1, 23D2, and 20D3 are connected in series to form the reaction material modules 20D1, 20D2, and 20D3, respectively. Thereafter, the reaction material modules 20D1, 20D2, and 20D3 are disposed so that the particle diameter increases from the wall surface side of the housing 12 toward the center side.

That is, the reaction material module 20D1 containing the reaction material piece 22D1 having a relatively small particle diameter (particle diameter r ₁ ) has a relatively large particle diameter (particle diameter r ₃ ) on the center side of the housing 12. The reaction material module 20D3 for accommodating the piece 22D3 has a reaction material module 20D2 for accommodating the reaction material piece 22D2 having a particle diameter larger than the reaction material piece 22D1 and smaller than the reaction material piece 22D3 on the most wall surface side of the housing 12. The reaction material module 20D1 and the reaction material module 20D3 are disposed.

As described above, the reaction material module 20D1 that accommodates the reaction material piece 22D having a relatively small particle diameter (particle diameter r ₁ ) accommodates the reaction material piece 22D having a relatively large particle diameter on the center side of the housing 12. In the hydrogen removing device 10D configured such that the reaction material module 20D3 to be disposed is disposed on the wall surface side of the housing 12, the gas 13 to be treated is introduced into the housing 12 from the intake portion 14 as in the hydrogen removing device 10A. Then, hydrogen is removed by the hydrogen removing unit 11 in which the reaction material modules 20D1, 20D2, and 20D3 of the housing 12 are disposed, and the treated gas 15 is exhausted from the exhaust unit 16.

  In the reaction material modules 20D1, 20D2, and 20D3 as the hydrogen removing unit 11, the pressure loss increases from the wall surface side (the edge side of the flow path of the gas to be processed 13) of the housing 12 toward the center side. (Or the processed gas 15) is less likely to gather on the center side, and the flow of the gas 13 to be processed (or the processed gas 15) flowing through the reaction material modules 20D1, 20D2, and 20D3 is made more uniform.

  In addition, the hydrogen removal method performed using the hydrogen removal apparatus according to the fourth embodiment of the present invention is a hydrogen removal method performed using the hydrogen removal apparatus according to the first embodiment of the present invention, such as the first hydrogen removal method. Although it differs from the removal method in that the apparatus to be used is a hydrogen removal apparatus 10D instead of the hydrogen removal apparatus 10A, the process is substantially the same. Therefore, the description of the fourth hydrogen removal method performed using the hydrogen removal apparatus 10D is omitted from the description of the first hydrogen removal method performed using the hydrogen removal apparatus 10A.

  According to the hydrogen removal apparatus 10D and the fourth hydrogen removal method, the same effects as those of the hydrogen removal apparatus 10A and the first hydrogen removal method can be achieved. Furthermore, in the hydrogen removal apparatus 10D and the fourth hydrogen removal method, the hydrogen removal unit 11 is configured so that the pressure loss increases from the wall surface side of the housing 12 (the edge side of the flow path of the gas to be processed 13) toward the center side. Therefore, the flow of the gas to be processed 13 (or the processed gas 15) flowing through the reaction material module 20D can be made more uniform.

[Fifth Embodiment]
FIG. 7 is a cross-sectional view of a hydrogen removal apparatus 10E which is an example of a hydrogen removal apparatus according to the fifth embodiment of the present invention.

  The hydrogen removal apparatus 10E differs from the hydrogen removal apparatus 10A in the direction in which the gas 13 to be treated is vented, but the other points are not substantially different. Therefore, in the description of the present embodiment, the difference from the hydrogen removal apparatus 10A will be mainly described, and the description of the contents overlapping with the description of the above-described embodiment will be omitted.

  Briefly speaking, the hydrogen removal apparatus 10E has substantially the same configuration as the hydrogen removal apparatus 10A rotated 90 degrees. That is, the hydrogen removing device 10E includes the hydrogen removing unit 11 as in the hydrogen removing device 10A, and introduces the gas 13 to be processed into the casing 12 in which the hydrogen removing unit 11 is disposed, from the intake unit 14, After passing through the removal unit 11 to remove hydrogen contained in the gas 13 to be processed to be a treated gas 15, the exhaust gas is exhausted from the exhaust unit 16.

  In the hydrogen removing device 10E, the intake section 14 and the exhaust section 16 are provided on the side surface of the casing 12, and the inhaled gas 13 flows in the casing 12 in the horizontal direction (lateral direction in FIG. 7). The exhaust gas is exhausted after passing through the hydrogen removing unit 11. Further, in the hydrogen removal apparatus 10E, two partition plates 17 extending in a substantially vertical direction with respect to the direction in which the gas to be processed 13 (or the processed gas 15) flows are installed in the housing 12 at two locations. The reaction material module 20 </ b> E as the hydrogen removing unit 11 is disposed between the partition plate 17 and the partition plate 17.

  FIG. 8 is a schematic view of a reaction material module 20E as the hydrogen removal unit 11 in the hydrogen removal apparatus 10E. FIG. 8A is a longitudinal sectional view of the reaction material module 20E, and FIG. 8B is a view of the reaction material module 20E. It is a side view.

  The configuration of the reaction material module 20E is substantially the same as that of the reaction material module 20A and the like, but the arrangement direction (direction during use) is different. Specifically, in the reaction material module 20A and the like, the ventilation direction of the gas to be processed 13 is vertical (vertical direction in FIG. 2 and the like), but in the reaction material module 20E, the ventilation of the gas to be processed 13 is performed. The direction is a horizontal direction (lateral direction in FIG. 7). Further, in the reaction material module 20E, an expansion absorption region 24 is set in the upper part of each cell 23.

  In the hydrogen removing device 10E that allows the gas 13 to be processed to flow in the horizontal direction, when the expansion absorption region 24 is a simple space, the upper portion of the cell 23 of the reaction material module 20E becomes a space, so that the gas 13 to be processed reacts with hydrogen. Thus, the reaction material filling region 25 filled with the reaction material pieces 22 is not ventilated, but the expansion absorption region 24, which is a simple space, is ventilated.

  Therefore, in the hydrogen removal device 10E or the like in which the gas to be treated 13 flows in the horizontal direction, a baffle plate 35 or the like that prevents the ventilation of the expansion absorption region 24 is provided at the upper portion on the inlet side of the cell 23, and the upper portion of the ventilation portion 26. Is closing the opening. In the hydrogen removing device 10E, the baffle plate 35 blocks the opening at the top of the ventilation portion 26, so that the baffle plate 35 enters the expansion absorption region 24 even if the expansion absorption region 24 is merely a space. Since the gas 13 is blocked, the gas 13 to be treated can enter the reaction material filling region 25.

  The baffle plate 35 has a short length in the direction in which the gas to be processed 13 flows so that the expansion absorption region 24 in the cell 23 does not become unnecessarily small. Further, the baffle plate 35 is fixed to the container 21A by adopting an arbitrary fixing method such as adhesion, welding, screwing or the like.

  The reaction material module 20E (container 21A) shown in FIG. 7 is configured substantially the same as the reaction material module 20A (container 21A) except for the baffle plate 35, but the reaction material module 20A (container 21A). The portion configured substantially in the same manner may be configured in substantially the same manner as the other reaction material module 20 (container 21) (FIG. 2) such as the reaction material module 20B (container 21B).

  For example, the reaction material module 20E (container 21A) further includes a baffle plate 35 and a bias prevention plate 31 (FIG. 4) extending in the vertical direction (vertical direction) based on the state after the reaction material module 20E is disposed. The provided structure may be sufficient, and the structure which further provided the uneven | corrugated | grooved part 33 (FIG. 5) in the container inner surface may be sufficient.

  In the hydrogen removal device 10E in which the reaction material module 20E configured as described above is installed as the hydrogen removal unit 11, the gas 13 to be treated is introduced into the housing 12 from the intake portion 14 in the same manner as the hydrogen removal device 10A. Hydrogen is removed by the hydrogen removing unit 11 in which a plurality of the reaction material modules 20E of the body 12 are arranged, and the processed gas 15 is exhausted from the exhaust unit 16.

  Further, in the hydrogen removing device 10E in which the gas to be processed 13 flows in the horizontal direction, for example, even when the expansion absorption region 24 is a simple space, the baffle plate 35 allows the gas to be processed 13 to pass through the space. Since it inhibits, it can suppress that the removal efficiency of hydrogen falls by the to-be-processed gas 13 ventilating the said space.

  Note that the hydrogen removal method performed using the hydrogen removal apparatus according to the fifth embodiment of the present invention is a hydrogen removal method performed using the hydrogen removal apparatus according to the first embodiment of the present invention, such as the first hydrogen removal method. Although it differs from the removal method in that the device to be used is a hydrogen removal device 10E instead of the hydrogen removal device 10A, the steps are substantially the same. Accordingly, the description of the fifth hydrogen removal method performed using the hydrogen removal apparatus 10E is omitted with the description of the first hydrogen removal method performed using the hydrogen removal apparatus 10A.

  According to the hydrogen removal device 10E and the fifth hydrogen removal method, the same effects as those of the hydrogen removal device 10A and the first hydrogen removal method can be obtained. In the hydrogen removal device 10E and the fifth hydrogen removal method, even if the expansion absorption region 24 is a simple space, the baffle plate 35 inhibits the gas to be processed 13 from passing through the space. It is possible to suppress a reduction in hydrogen removal efficiency due to the gas 13 to be treated passing through the space.

  The above description is centered on preventing adverse effects when the expansion absorption region 24 is a simple space. However, the expansion absorption region 24 is composed of an expansion absorber such as a hollow metal container. It does not prevent. Further, in the case where the expansion absorption region 24 is configured by an expansion absorber, and when the expansion absorber obstructs the flow of the gas to be processed 13, that is, the expansion absorber constituting the expansion absorption region 24 is used as the baffle plate 35. If the function is also provided, the installation of the baffle plate 35 can be omitted.

  Furthermore, when the expansion absorber is used, the gas 13 to be treated can be prevented from entering almost the entire expansion absorption region 24. Further, even if the expansion absorber is broken when it is crushed by the expansion of the reaction material, the function of preventing the gas 13 to be treated from entering is not impaired as long as some cracks are generated on the surface. This is because the gas 13 to be treated flows through the reaction material filling region 25 unless a flow path that penetrates the expansion absorption region 24 from the inlet side to the outlet side of the cell 23 is formed. Further, even if a flow path that passes through the expansion absorption region 24 is formed due to the damage of the expansion absorber, the flow path resistance is high in the flow path that passes through a small crack, and most of the gas to be treated 13 reacts. It is considered that the material flows through the material filling region 25.

[Sixth Embodiment]
The hydrogen removal apparatus according to the sixth embodiment of the present invention is different from the hydrogen removal apparatus according to the fifth embodiment of the present invention in that the configuration of the reaction material module to be disposed is different. This point is not substantially different. That is, the sectional view of the hydrogen removing device 10F which is an example of the hydrogen removing device according to the sixth embodiment of the present invention is obtained by replacing the symbols 10E and 20E shown in FIG. 7 with the symbols 10F and 20F. Therefore, in the description of the present embodiment, the reaction material module 20F that is a difference between the hydrogen removal apparatus 10F and the hydrogen removal apparatus 10E will be mainly described, and the description of the contents overlapping with the description of the above-described embodiment will be omitted.

  FIG. 9 is a schematic diagram of a reaction material module 20F applied in a hydrogen removal apparatus 10F (in FIG. 7, the reference numeral 10E is replaced with 10F) as an example of the hydrogen removal apparatus according to the sixth embodiment of the present invention. 9A is a longitudinal sectional view of the reaction material module 20F, and FIG. 9B is a side view of the reaction material module 20F.

  The reaction material module 20F is provided with a baffle plate 36 with an inclination instead of the baffle plate 35 with respect to the reaction material module 20E. That is, the reaction material module 20F forms the cell 23 which accommodated the reaction material piece 22 in the inside of the container 21A similarly to the reaction material module 20E, and furthermore, the cell 23 is connected in series (lateral direction in FIG. 9 (A)). Concatenated and configured. In addition, an expansion absorption region 24 is set in the upper part of the cell 23.

  The inclined baffle plate 36 is in contact with the baffle plate 35 when the gas to be processed 13 is vented to the lower surface in contact with the gas to be processed 13 when the gas to be processed 13 is vented (the cell shown in FIG. 9A). 23 is different in that it has an inclined portion 36a formed with a rising inclined surface (as it goes from the left side to the right side), but is not substantially different in other points. As for the fixing method of the inclined baffle plate 36, similarly to the baffle plate 35, for example, an arbitrary fixing method such as adhesion, welding, screwing or the like is adopted to fix the inclined baffle plate 36 to the container 21 </ b> A.

  By providing such an inclined baffle plate 36, the inclined baffle plate 36 blocks the gas 13 to be processed that is about to enter the expansion absorption region 24 even if the expansion absorption region 24 is merely a space. Therefore, the gas 13 to be processed can enter the reaction material filling region 25 and the gas 13 to be processed can be vented in the reaction material filling region 25 as long as possible.

  The reaction material module 20F (container 21A) shown in FIG. 9 is configured substantially the same as the reaction material module 20A (container 21A) except for the baffle plate 35, but the reaction material module 20B (container 21B). The other reaction material module 20 (container 21) (FIG. 2) etc. may be comprised substantially the same.

  For example, the reaction material module 20F (container 21A), together with the inclined baffle plate 36, is a bias prevention plate 31 (FIG. 4) extending in the vertical direction (vertical method) with reference to the state after the reaction material module 20F is disposed. The structure which provided further the uneven | corrugated | grooved part 33 (FIG. 5) may be sufficient in the container inner surface.

  In the hydrogen removal apparatus 10F in which the reaction material module 20F configured as described above is installed as the hydrogen removal unit 11, the gas 13 to be treated is introduced into the casing 12 from the intake section 14 similarly to the hydrogen removal apparatus 10A. Hydrogen is removed by the hydrogen removing section 11 in which a plurality of the reaction material modules 20F of the body 12 are arranged, and the processed gas 15 is exhausted from the exhaust section 16.

  Further, in the hydrogen removal apparatus 10F in which the gas 13 to be processed flows in the horizontal direction, for example, even when the expansion absorption region 24 is a simple space, the baffle plate 36 with an inclination allows the gas 13 to be processed to pass through the space. In order to inhibit this, it is possible to suppress a decrease in hydrogen removal efficiency due to the gas 13 to be treated flowing through the space.

  Further, in the hydrogen removing apparatus 10F, the baffle plate 36 with the inclination is disposed in the cell 23, so that the flow path width gradually increases with respect to the direction in which the gas 13 to be treated is vented (flowed). Therefore, it is possible to vent the gas 13 to be processed in the reaction material filling region 25 as much as possible (as long as possible) while securing a space as the expansion absorption region 24 where the reaction material piece 22 expands.

  In addition, the hydrogen removal method performed using the hydrogen removal apparatus according to the sixth embodiment of the present invention is a hydrogen removal method performed using the hydrogen removal apparatus according to the first embodiment of the present invention, such as the first hydrogen removal method. Although it differs from the removal method in that the device to be used is a hydrogen removal device 10F instead of the hydrogen removal device 10A, the steps are substantially the same. Therefore, the description of the sixth hydrogen removal method performed using the hydrogen removal apparatus 10F is omitted with the description of the first hydrogen removal method performed using the hydrogen removal apparatus 10A.

  According to the hydrogen removal device 10F and the sixth hydrogen removal method, the same effects as those of the hydrogen removal device 10A and the first hydrogen removal method can be obtained. Further, in the hydrogen removing device 10F and the sixth hydrogen removing method, even if the expansion absorption region 24 is a simple space, the inclined baffle plate 36 inhibits the gas to be processed 13 from passing through the space. In addition, it is possible to suppress a decrease in hydrogen removal efficiency due to the gas 13 to be treated passing through the space.

  Furthermore, in the hydrogen removing device 10F and the sixth hydrogen removing method, the baffle plate 36 with the inclination is disposed in the cell 23, so that the flow path width gradually increases with respect to the direction in which the gas 13 to be treated is vented (flowed). Therefore, while the space is secured as the expansion absorption region 24 where the reaction material piece 22 expands, the gas 13 to be treated can be vented in the reaction material filling region 25 as much as possible. The expansion absorption region 24 may be an expansion absorber constituted by a hollow metal container or the like as in the hydrogen removal device 10E.

[Seventh Embodiment]
The hydrogen removal apparatus according to the seventh embodiment of the present invention is different from the hydrogen removal apparatus according to the fifth embodiment of the present invention in that the configuration of the reaction material module disposed is different. This point is not substantially different. That is, the sectional view of the hydrogen removing device 10G which is an example of the hydrogen removing device according to the seventh embodiment of the present invention is obtained by replacing the symbols 10E and 20E shown in FIG. 7 with the symbols 10G and 20G. Therefore, in the description of the present embodiment, the description will focus on the reaction material module 20G, which is a difference between the hydrogen removal apparatus 10G and the hydrogen removal apparatus 10E, and the description of the contents overlapping with the description of the above-described embodiment will be omitted.

  FIG. 10 is a schematic view of a reaction material module 20G applied in a hydrogen removal apparatus 10G (in FIG. 7, the reference numeral 10E is replaced with 10G) as an example of the hydrogen removal apparatus according to the seventh embodiment of the present invention. 10A is a side view of the container 21G of the cell 23 constituting the reaction material module 20G, FIG. 10B is a longitudinal sectional view of the container 21G, and FIG. 10C is a longitudinal sectional view of the reaction material module 20G. .

  The reaction material module 20G realizes the function realized by the container 21A and the baffle plate 35 by the container 21G. More specifically, the cell 23 in which the reaction material piece 22 is accommodated in the container 21G is connected in series (lateral direction in FIG. 10A). For example, the expansion absorption region 24 is formed in the upper portion of the cell 23. Is set. That is, the reaction material module 20 </ b> G is different from the reaction material module 20 </ b> E in that the reaction material piece 22 is accommodated in the container 21 </ b> G instead of the container 21 </ b> A and the baffle plate 35 is not disposed in the cell 23.

  For example, the container 21G vents the gas 13 to be treated in addition to the ventilation portion 26 to a surface (hereinafter referred to as an “intake surface”) 38 that serves as an inlet of the gas 13 to be treated with respect to the container 21A and the like. A non-opening 39 that is not allowed is further provided. More specifically, when the state after the reaction material module 20G is disposed as a reference, the container 21G is provided with a non-opening portion 39 in the upper portion of the intake surface 38 and in the lower portion of the non-opening portion 39. A portion 26 is provided.

  The non-opening 39 can be configured by a flat plate that closes the mesh when the ventilation portion 26 of the intake surface 38 is formed by a mesh, for example. In addition, when the ventilation portion 26 of the intake surface 38 is a through hole, the through hole is provided in the lower portion of the intake surface 38, but not provided in the upper portion of the intake surface 38. The air intake surface 38 provided with the non-opening 39 in the upper part can be formed.

  The hydrogen removing device 10G in which the reaction material module 20G configured as described above is installed as the hydrogen removing unit 11 operates in the same manner as the hydrogen removing device 10E. That is, the gas 13 to be treated is introduced into the casing 12 from the intake section 14, and the hydrogen is removed by the hydrogen removing section 11 in which a plurality of the reaction material modules 20 </ b> G of the casing 12 are disposed, and the processed gas 15 is exhausted. The air is exhausted from the portion 16. Further, even when the expansion absorption region 24 is a simple space, the non-opening portion 39 prevents the gas to be processed 13 from passing through the space, and accordingly, the gas to be processed 13 passes through the space. It can suppress that the removal efficiency of hydrogen falls.

  In addition, the hydrogen removal method performed using the hydrogen removal apparatus according to the seventh embodiment of the present invention is the hydrogen removal performed using the hydrogen removal apparatus according to the first embodiment of the present invention such as the first hydrogen removal method. Although it differs from the removal method in that the apparatus to be used is a hydrogen removal apparatus 10G instead of the hydrogen removal apparatus 10A, the process is substantially the same. Accordingly, the description of the seventh hydrogen removal method performed using the hydrogen removal apparatus 10G is omitted from the description of the first hydrogen removal method performed using the hydrogen removal apparatus 10A.

  According to the hydrogen removal apparatus 10G and the seventh hydrogen removal method, the same effects as those of the hydrogen removal apparatus 10A and the first hydrogen removal method can be achieved. Further, in the hydrogen removing device 10G and the seventh hydrogen removing method, even if the expansion absorption region 24 is a simple space, the non-opening portion 39 inhibits the gas to be processed 13 from passing through the space. It is possible to suppress a reduction in hydrogen removal efficiency due to the gas to be processed 13 passing through the space.

  Further, in the hydrogen removing device 10G and the seventh hydrogen removing method, the opening 21 is provided in the container 21G. Therefore, the baffle plate 35 and the baffle plate 35 are compared with the hydrogen removing device 10E and the fifth hydrogen removing method. It is possible to save the trouble of disposing the. The expansion absorption region 24 may be an expansion absorber constituted by a hollow metal container or the like as in the hydrogen removal device 10E.

  As described above, according to the hydrogen removal method performed using the hydrogen removal apparatuses 10A to 10G and the hydrogen removal apparatuses 10A to 10G, the reaction material piece 22 is formed as in the case where the small piece of metal peroxide is the reaction material piece 22, or the like. Even if the volume expands by reacting with hydrogen contained in the gas 13 to be processed, the expansion absorption region 24 absorbs the expansion, so the porosity of the reaction material piece 22 does not decrease and the gas 13 to be processed passes. An increase in pressure loss during (venting) can be prevented.

  Moreover, according to the hydrogen removal method performed using the hydrogen removal apparatuses 10A to 10G and the hydrogen removal apparatuses 10A to 10G, the reactant module 20 configured by connecting a plurality of cells 23 as the hydrogen removal unit 11 is employed. Therefore, installation and removal of the hydrogen removal unit 11 can be performed relatively easily.

  The present invention is not limited to the above-described embodiment as it is, and can be carried out in various forms other than the above-described examples in the implementation stage, and various omissions can be made without departing from the gist of the invention. , Add, replace, change. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 10A-10G ... Hydrogen removal apparatus, 11 ... Hydrogen removal part, 12 ... Housing | casing, 13 ... Processed gas, 14 ... Intake part, 15 ... Processed gas, 16 ... Exhaust part, 17 ... Partition plate, 17a ... Hole , 18 ... Fixing tool, 20 (20A to 20G) ... Reaction material module, 21 (21A to 21G) ... Container, 22 ... Reaction material piece, 22D1, 22D2, 22D3 ... Reaction material piece, 23 ... Cell, 23D1, 23D2, 23D3 ... cell, 24 ... expansion absorption region, 25 ... reactant filling region, 26 ... venting portion, 27 ... container body, 28 ... door, 31 ... bias plate, 33 ... concave portion, 35 ... baffle plate, 36 ... tilt It baffles attached, 36a ... inclined portion, 38 ... air intake surface, (reaction material pieces) 39 ... No _{openings, r 1, r 2, r} 3 ... particle size.

Claims (10)

In the hydrogen removal apparatus for a reactor containment vessel that introduces a gas to be processed into the inside from an intake portion and removes the gas contained in the gas by oxidizing it, and then exhausts the gas from the exhaust portion to the outside.
Comprising a hydrogen removing unit that vents the gas to react the gas with the metal oxide and oxidizes and removes hydrogen contained in the gas;
The hydrogen removing unit includes a module in which cells containing the metal oxide are connected in series in a container in which the gas can be vented, and the gas passes through the module. It is a configuration in which a plurality of air is ventilated from the intake part to the exhaust part,
An expansion absorption region is provided in the upper portion of the cell to absorb an expansion when the metal oxide expands. 2. The hydrogen removal apparatus according to claim 1, wherein the expansion absorption region is configured by any one of an expansion absorber that receives a stress generated when the space and the metal oxide expand and reduces a volume. . 3. The hydrogen removal according to claim 2, wherein the expansion absorber is a structure that, when subjected to a compressive stress generated when the metal oxide expands, contracts in a direction in which the compressive stress is received. apparatus. The cells connected in series as the modules are provided with a bias prevention plate for partitioning the space in the cells in the horizontal direction with reference to the state after the modules are arranged. The hydrogen removal apparatus according to any one of claims 1 to 3. The hydrogen removal apparatus according to claim 4, wherein the bias prevention plate has an opening smaller than the metal oxide. 2. An uneven part, in which unevenness is formed by a curved surface when the metal oxide is a particle, is provided on at least a part of the inner surface of the container containing the metal oxide. 6. The hydrogen removing device according to any one of 5 to 5. The hydrogen removal unit allows the gas to flow from the intake unit formed by the module to the exhaust unit through two or more types of modules having different metal oxide sizes accommodated in the container of the cell. The hydrogen according to any one of claims 1 to 6, wherein the metal oxide is arranged and arranged so that the size of the metal oxide increases from the center side to the edge side of the flow path. Removal device. 8. The hydrogen removal apparatus according to claim 1, wherein when the cells are connected in a horizontal direction, a baffle plate is disposed in the upper portion of the intake side inside the cells. 9. 9. The hydrogen removing apparatus according to claim 8, wherein the baffle plate has an inclined portion in which an inclined surface rising as the gas flows is formed on a lower surface in contact with the gas when the gas flows. . When the cells are connected in the horizontal direction, a surface of the cell on the side where the gas is sucked is provided with a non-opening portion that does not allow the gas to flow through the upper portion, and the gas flows through the lower portion of the non-opening portion. The hydrogen removing device according to claim 1, wherein a possible ventilation portion is formed.

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