Chemical Heat Storage Reactor

Abstract

The present invention addresses the problem of providing a chemical heat storage reactor in which the flow paths through which reaction gas passes are not easily crushed.　To address the above-mentioned problem, the present invention provides a chemical heat storage reactor characterized by comprising: a container; a chemical heat storage material that is housed inside the container; and a reaction gas feeder that is housed inside the container and guides the reaction gas for use in the reaction of the chemical heat storage material to the chemical heat storage material. The reaction gas feeder comprises a porous body, or a housing that is filled with a crush-suppressing material inside.

Description

[Technical Field]

[0001] The present invention relates to a chemical heat storage reactor of a chemical heat storage reactor. [Background technology]

[0002] Chemical heat storage, which uses chemical reactions to store and release heat and enables the storage of thermal energy at room temperature, is being researched and developed with the aim of effectively utilizing exhaust heat (waste heat) from heat sources that generate heat during operation, such as engines and other driving forces, as well as factories and combustion treatment facilities (such as waste incineration facilities).

[0003] Chemical heat storage reaction devices for chemical heat storage generally use solid chemical heat storage materials, and store heat generated by an endothermic reaction when heat is applied to the chemical heat storage material to separate the product gas, while also being configured to allow heat to be released to the outside of the chemical heat storage reaction device by causing an exothermic reaction between the chemical heat storage material and the reaction gas.

[0004] An example of such a chemical heat storage reaction device is the chemical heat storage reactor described in Patent Document 1. Patent Document 1 states that if a steam flow path is simply created by bending a plate material into a rectangular wave shape (unevenness), the chemical heat storage material may expand due to a hydration reaction and contract due to a dehydration reaction, causing the flow path to be crushed. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-115060 Summary of the Invention [Problem to be solved by the invention]

[0006] Therefore, in the chemical heat storage reactor described in Patent Document 1, pressing sections are bent continuously at both ends of a plate material bent in a rectangular wave shape, extending in the direction in which the chemical heat storage material is arranged (the Y direction in Figure 1 of Patent Document 1), and the pressing sections are arranged so as to be sandwiched between the wall of the reaction vessel and the chemical heat storage material. In this state, when the chemical heat storage material expands, the pressing sections are pressed toward the wall, thereby suppressing movement of the pressing sections. It is described that this suppresses movement of both ends of the plate material bent in a rectangular wave shape in the direction approaching each other (the Z direction in Figure 1 of Patent Document 1), and suppresses crushing of the parts bent in a rectangular wave shape. However, even with a structure like that of Patent Document 1, there is a risk that a structure in which a plate material is simply bent may not be strong enough to ensure a flow path through which steam passes. Therefore, there is a need for a different structure to suppress crushing.

[0007] Therefore, an object of the present invention is to provide a chemical heat storage reactor in which the flow path through which the reaction gas passes is not easily crushed. [Means for solving the problem]

[0008] As a result of thorough investigation into the above-mentioned problems, the present inventors have found that in a chemical heat storage reactor, the reactive gas supply body that guides the reactive gas used in the reaction of the chemical heat storage material to the chemical heat storage material is made of a porous body or a housing filled with a crush suppression member inside, which makes the reactive gas supply body less likely to be crushed and makes it easier for the reactive gas to be guided to the entire chemical heat storage material, and have completed the present invention. That is, the present invention is the following chemical heat storage reactor.

[0009] The chemical heat storage reactor of the present invention, which solves the above problems, comprises a container, a chemical heat storage material stored inside the container, and a reaction gas supplier stored inside the container and guiding a reaction gas used in the reaction of the chemical heat storage material to the chemical heat storage material, and is characterized in that the reaction gas supplier is made of a porous body or a housing filled with a collapse suppression member inside. According to this chemical heat storage reactor, the collapse suppression means provided on the reactant gas supply body suppresses collapse of the reactant gas supply body, thereby making it easier to supply reactant gas to the entire chemical heat storage material.

[0010] In one embodiment of the chemical heat storage reactor of the present invention, the porous body is a plate-like body. According to this feature, by making the porous body into a plate shape, the volume of the reaction gas supply body can be reduced, and the proportion of the volume it occupies in the container can be reduced, which has the effect of allowing a large amount of chemical heat storage material to be stored. Furthermore, the contact area between the plate-shaped body and the chemical heat storage material is increased, making it possible to efficiently transfer heat from the plate surface of the plate-shaped body to the downstream side (rear side) of the chemical heat storage material, which has the effect of increasing the reaction rate of the chemical heat storage material on the downstream side.

[0011] In addition, one embodiment of the chemical heat storage reactor of the present invention is characterized in that the plate-shaped body has two or more plate-shaped members each having a plurality of through holes in the plate thickness direction, and is stacked with the plate-shaped members shifted in position so that the through holes of one side and a portion of the through holes of the plate-shaped member on the other side overlap each other. According to this feature, two or more plate-shaped members are stacked with the through holes of one side of the plate-shaped member and a portion of the through holes of the other side of the plate-shaped member shifted in position so that they overlap each other, which has the effect of simplifying the manufacture of the plate-shaped members.

[0012] In one embodiment of the chemical heat storage reactor of the present invention, the reaction gas supply body is characterized in that a plurality of plate-like bodies are arranged so as to intersect with each other in the plate thickness direction of the plate-like bodies. According to this feature, since the plate-shaped bodies are arranged so that they intersect with each other in the thickness direction, the contact area between the thick plate bodies and the chemical heat storage material can be increased, and heat can be added to the chemical heat storage material from the contact surface via the plate-shaped bodies heated by the reactive gas, which has the effect of improving the speed at which the chemical heat storage material reacts. [Effects of the Invention]

[0013] According to the present invention, it is possible to provide a chemical heat storage reactor in which the reaction gas supply body is not easily crushed. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a schematic explanatory diagram showing the structure of a chemical heat storage device according to a first embodiment of the present invention. [Figure 2] FIG. 1 is a schematic explanatory diagram showing a plan view of the inside of a chemical heat storage reactor of a chemical heat storage device according to a first embodiment of the present invention. [Figure 3] Figure (A) is a cross-sectional view taken along the line AA in Figure 2. Figure (B) is an enlarged view of a portion of Figure (A). [Figure 4] FIG. 2 is a schematic explanatory diagram showing a plan view of the inside of a chemical heat storage reactor of a chemical heat storage device according to a modified example of the first embodiment of the present invention. [Figure 5] FIG. 10 is a schematic explanatory diagram showing a plan view of the inside of a chemical heat storage reactor of a chemical heat storage device according to a second embodiment of the present invention. [Figure 6] 1 is a schematic diagram showing a reaction gas supply body according to a second embodiment of the present invention, in which FIG. 1A is a schematic diagram of a plate-shaped member on one side before being stacked to form a plate-shaped body, FIG. 1B is a schematic diagram of a plate-shaped member on the other side before being stacked to form a plate-shaped body, and FIG. 1C is a schematic diagram of a plate-shaped body in which the plate-shaped member on one side and the plate-shaped member on the other side are stacked. [Figure 7] 6(C) is a schematic diagram showing a part of the chemical heat storage material and the plate-shaped body in the BB cross section of FIG. [Figure 8] 6(C) is a schematic diagram showing a part of the chemical heat storage material and the plate-shaped body in the CC cross section of FIG. 6(C). [Figure 9] FIG. 10 is a schematic explanatory diagram showing a plan view of the inside of a chemical heat storage reactor of a chemical heat storage device according to a third embodiment of the present invention. [Figure 10] FIG. 10 is a schematic explanatory diagram showing a plan view of the inside of a chemical heat storage reactor of a chemical heat storage device according to a modified example of the second embodiment of the present invention. [Figure 11] 11 is a schematic diagram showing a part of the chemical heat storage material and the plate-shaped body in the DD cross section of FIG. 10. [Figure 12]FIG. 10 is a schematic explanatory diagram showing a plan view of the inside of a chemical heat storage reactor of a chemical heat storage device according to a modified example of the third embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0015] The chemical heat storage device and the heat storage method for the chemical heat storage material of the present invention store exhaust heat (waste heat) from heat sources that generate heat during operation, such as driving engines such as engines, as well as factories and facilities that perform combustion treatment (such as waste incineration facilities), in the chemical heat storage material, and when heat is needed, release the heat from the heat storage product, making it possible to use the heat. Note that the chemical heat storage device of the present invention may be used as a heat supply source in a fixed state at a predetermined location, or may be a transportable device that is transported to a heat demand area where heat is needed and used.

[0016] Furthermore, in the chemical heat storage device and heat storage method for a chemical heat storage material of the present invention, during heat storage, the chemical heat storage material is heated to separate it into a heat storage product and a product gas, and during heat release, the heat storage product and the reaction gas are reacted to generate the chemical heat storage material. Here, it is preferable that the product gas generated during heat storage and the reaction gas supplied during heat release are the same type of substance. Then, the reaction related to chemical heat storage progresses through a liquefaction process in which the product gas is condensed and recovered as a reaction liquid, and a vaporization process in which the reaction liquid obtained in the liquefaction process is evaporated and used as a reaction gas, making it possible for the chemical heat storage material to store and release heat. Note that hereinafter, the product gas and reaction gas may be referred to as "reaction media."

[0017] A typical reaction involved in chemical heat storage in the present invention is, for example, a reaction such as that shown in formula (1) below.

number

[0018] In conventional chemical heat storage devices, during heat storage, heat Q is added to the chemical heat storage material AB in the reactor to generate the reaction medium B (product gas), which is then introduced into the evaporator / condenser. The heat contained in the reaction medium B (product gas) is released on the evaporator / condenser side, lowering the temperature of the reaction medium B (product gas). The reaction medium B (product gas) is liquefied by a condensation reaction and recovered as a reaction liquid. Since all of the recovered reaction liquid must be stored in the evaporator / condenser, a container with a certain amount of space is required to store the reaction liquid. Therefore, due to the influence of the sensible heat of the container itself, the energy consumption required to lower the temperature of the reaction medium B (product gas) increases.

[0019] Furthermore, during heat release, the reaction proceeds in the opposite direction to that during heat storage, and on the evaporator / condenser side, heat is added to the reaction liquid to vaporize it into reaction medium B (reaction gas), and on the reactor side, reaction medium B (reaction gas) reacts with heat storage product A, and heat is released by the exothermic reaction that produces chemical heat storage material AB. At this time, all of the reaction liquid in the evaporator / condenser is heated, so more energy than necessary is consumed to generate the amount of reaction gas required for the exothermic reaction on the reactor side.

[0020] On the other hand, in the chemical heat storage device and heat storage method of the chemical heat storage material of the present invention, when storing and releasing heat based on the reaction of formula (1), the reaction liquid used in the reaction of the chemical heat storage material AB is stored separately from the location where heat exchange such as condensation and evaporation occurs, so that heat storage and release related to chemical heat storage can be performed without consuming more energy than necessary in the liquefaction process in which the product gas is condensed and recovered as reaction liquid, and in the vaporization process in which the reaction liquid obtained in the liquefaction process is evaporated and used as reaction gas. This makes it possible to suppress energy loss and advantageously promote the reaction related to chemical heat storage compared to conventional chemical heat storage devices.

[0021] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. The present invention aims to make it difficult for the flow path through which the reactive gas passes to be crushed by applying a porous body or a housing filled with a crush suppression member to the reactive gas supply body, even if pressure (crushing pressure) that attempts to crush the reactive gas supply body occurs due to repeated expansion and contraction caused by the reaction of the chemical thermal storage material, and to make it easier for the reactive gas to be guided throughout the entire chemical thermal storage material.

[0022] Porous bodies include solid objects with many holes. For example, porous bodies include metal foams, which are cellular structures of metal with many small spaces (air bubbles) that are interconnected, and plate-like members with multiple through-holes in the thickness direction and overlapping with the through-holes of the plate-like members shifted relative to each other.

[0023] Furthermore, an example of a housing filled with a crush suppression member is one in which a separate object that can ensure a flow path (space for passage) for the reactant gas and can withstand crushing pressure is filled inside the housing as the crush suppression member. Specifically, in addition to inorganic materials such as metal, crushed stone, or ceramics, PCM capsules that function as latent heat storage may also be used as the crush suppression member. A PCM capsule is a metal capsule that contains a latent heat storage material (PCM is an abbreviation for Phase Change Material), which absorbs and releases heat by repeatedly melting and solidifying. When the PCM capsule is heated to high temperatures, the latent heat storage material inside melts and becomes liquid, but the outer metal capsule remains solid, so the latent heat storage material does not leak and a flow path for the reaction gas can be secured even if crushing pressure is generated. The housing may be cylindrical or rectangular, but is not particularly limited as long as it can secure a space that serves as a flow path for supplying the reaction gas to the chemical heat storage material.

[0024] The chemical heat storage device and the heat storage method of the chemical heat storage material described in the embodiments are merely examples to explain the chemical heat storage device and the heat storage method of the chemical heat storage material according to the present invention, and are not limited to these as long as they have similar effects.

[0025] [First embodiment] [Chemical heat storage device] FIG. 1 is a schematic explanatory diagram showing the structure of a chemical heat storage device 1a according to a first embodiment of the present invention. This chemical heat storage device 1a has a chemical heat storage reactor 2a that holds a chemical heat storage material 4, and a condenser 3 that condenses the product gas generated from the chemical heat storage material 4 and stores a reaction medium 9. The interior of the chemical heat storage reactor 2a and the interior of the condenser 3 are airtightly connected via a communication part 7. A heat exchange piping 5 through which a heat medium such as exhaust gas passes is provided inside the chemical heat storage reactor 2a. The communication part 7 is connected to an opening 6 of the chemical heat storage reactor 2a. The communication part 7 is provided with a valve 10 that can control the movement of the product gas between the chemical heat storage reactor 2a and the condenser 3.

[0026] (condenser) The condenser 3 is a structure for storing the reaction medium 9 generated as a gas from the chemical heat storage material 4 during heat storage as a liquid reaction medium 9, and the condenser 3 and the chemical heat storage reactor 2a are connected by a communication part 7. The condenser 3 is adjusted to a temperature at which the reaction medium 9 generated as a gas is condensed, and when the reaction medium 9 in the gas state flows into the condenser 3, it is condensed into a liquid. There are no particular restrictions on the adjustment of the temperature of the condenser 3, and it may be cooled by a cooling device or the like, or by natural heat radiation.

[0027] (Chemical Heat Storage Reactor) The chemical heat storage reactor 2a will be described with reference to Figures 2 and 3. The heat exchange piping 5 is not shown in Figures 2 and 3. The chemical heat storage reactor 2a includes a container 21, a reaction gas supplier 22a, a chemical heat storage material 4, and the heat exchange piping 5.

[0028] <Container> The container 21 is configured to hold the chemical thermal storage medium 4, and is made of a sealable structure. The shape and material of the container 21 are not particularly limited, but it is preferable that the container 21 be pressure resistant. By having pressure resistance, changes in the internal volume due to changes in the pressure inside the container 21 are suppressed, which has the effect of making it easier to control the internal pressure. The shape and material of the container 21 are not particularly limited. The container 21 has an opening 6 through which the reaction medium 9 desorbed from the chemical thermal storage medium 4 flows in and out, and the opening 6 is connected to the communication part 7.

[0029] <Reaction gas supplier> The reactive gas supplier 22a is housed inside the container 21, and is a member for guiding the reactive gas 8, which is the reactive medium 9, supplied from the communication part 7, to the far side (downstream side of the reactive gas supplier 22a) opposite to the side (upstream side of the reactive gas supplier 22a) of the opening 6. In other words, the reactive gas supplier 22a is for guiding the reactive gas 8 over the entire area from the upstream side to the downstream side of the chemical thermal storage medium 4, and a porous body or a housing filled with a collapse suppression member 27 can be used. As the porous body, a metal foam, which is a cellular structure of metal having a large number of small spaces and has interconnected cells, can be used.

[0030] The reactive gas supply body 22a of this embodiment shown in Figure 3 consists of a housing filled with a collapse suppression member 27, and the reactive gas supply body 22a has an internal space 23, a wall member 24, and the collapse suppression member 27. The housing may be cylindrical or rectangular, but is not particularly limited as long as it can secure a space that serves as a flow path for supplying the reaction gas 8 to the chemical thermal storage medium 4.

[0031] ≪Wall components≫ The wall member 24 is disposed so as to surround the internal space 23 of the housing, and secures the internal space 23, through which the reaction gas 8 passes. The wall member 24 has a gas supply unit 26 for guiding the reaction gas 8 in the internal space 23 to the chemical thermal storage medium 4. The gas supply unit 26 is a through-hole, and a plurality of gas supply units 26 are individually provided in the wall member 24. The gas supply units 26 are provided over the entire area from the opening 6 side (upstream side) to the back side (downstream side).

[0032] <Collapse prevention member> The crush suppression member 27 plays a role in making the housing less susceptible to crushing by crushing pressure 29 that occurs in the internal space 23 due to repeated expansion and contraction caused by the reaction of the chemical thermal storage medium 4 . The collapse suppression member 27 is an object that fills the internal space 23 inside the housing. The surface of the collapse suppression member 27 has irregularities, and the collapse suppression member 27 can be made of a material that can withstand the crushing pressure 29 that occurs due to repeated expansion and contraction of the chemical thermal storage medium 4. The gaps between the multiple collapse suppression members 27 form flow paths, and the reactive gas 8 passes through the flow paths (the gaps in the collapse suppression members 27) in a serpentine manner, passing from the internal space 23 through the gas supply unit 26 and reacting with the chemical thermal storage medium 4.

[0033] In this embodiment, a case where a plurality of crush suppression members 27 are filled inside has been exemplified, but the crush suppression members 27 are not particularly limited as long as they can secure gaps through which the reactive gas 8 passes and can withstand the crushing pressure 29 generated by repeated expansion and contraction of the chemical thermal storage medium 4. For example, examples of the crush suppression members 27 include inorganic materials such as metals, crushed stone, and ceramics, as well as PCM capsules that play a role in latent heat storage. It is desirable that the collapse suppression member 27 is sized so as not to block the through-hole of the gas supply unit 26 .

[0034] When the chemical thermal storage material 4 reacts with the reactive gas 8 and heat dissipation and heat storage are repeated, the volume of the chemical thermal storage material 4 repeatedly expands and contracts. As a result, the pressure on the downstream side (rear side) of the reactive gas supply body 22a increases, and the reactive gas supply body 22a is subjected to a pressure in a crushing direction (crushing pressure 29). When the downstream side (rear side) of the reactive gas supply body 22a is crushed, it becomes difficult for the reactive gas 8 to be introduced to the downstream side (rear side), and there is a risk that the reaction of the chemical thermal storage material 4 on the downstream side will not easily occur.

[0035] In the present invention, when the crushing pressure 29 is generated, the crush suppression members 27 come into contact with and support each other, which makes it difficult for the wall member 24 of the reactive gas supply body 22a to be crushed and for the flow path through which the reactive gas 8 passes to be blocked. Therefore, even when the crushing pressure 29 is generated, the durability of the reactive gas supply body 22a can be increased, which makes it easier to ensure the flow path and makes it easier to guide the reactive gas 8 to the back side (downstream side) of the gas supply part 26.

[0036] In addition, the reactive gas supply body 22a may be placed in a container or bag made of a metal mesh, or a mesh-like member may be placed between the chemical thermal storage material 4 and the reactive gas supply body 22a, so that the chemical thermal storage material 4 does not enter and block the through holes of the gas supply section 26.

[0037] <Chemical heat storage material> The chemical thermal storage material 4 is a chemical substance that separates into a heat storage product and a generated gas when heated, and releases heat through the reverse reaction. For example, examples of the heat storage product and generated gas include calcium oxide (CaO) and water vapor (H2O), calcium chloride (CaCl2) and water vapor (H2O), calcium bromide (CaBr2) and water vapor (H2O), calcium iodide (CaI2) and water vapor (H2O), magnesium oxide (MgO) and water vapor (H2O), magnesium chloride (MgCl2) and water vapor (H2O), zinc chloride (ZnCl2) and water vapor (H2O), strontium chloride (SrCl2) and ammonia (NH3), and strontium bromide (SrBr2) and ammonia (NH3). From the viewpoint of ease of procurement during heat release, the chemical thermal storage material 4 preferably uses water vapor as the generated gas and reactant gas.

[0038] The structure and shape of the chemical thermal storage medium 4 are not particularly limited, and examples thereof include powder, granules, pellets, flakes, etc. Also, it may be a molded body obtained by molding a powder, or a chemical thermal storage medium 4 supported on a porous body. From the viewpoint of having a large surface area to increase reactivity, a powder form is preferable.

[0039] Furthermore, the powdered chemical heat storage material 4 may be packed in a container or bag made of a metal mesh to form a cartridge. By forming a cartridge, it is possible to prevent the powdered chemical heat storage material 4 from flowing out of the reactor 2 and to prevent the chemical heat storage material 4 from being unevenly arranged inside the reactor 2. Furthermore, by forming a cartridge, it becomes easy to replace the chemical heat storage material 4, and there is also the effect of excellent handleability.

[0040] <Heat exchange piping> The chemical heat storage reactor 2a has heat exchange piping 5 for transferring heat between the chemical heat storage material 4 held inside and the outside. The heat exchange piping 5 may have any shape as long as it can transfer heat between the chemical heat storage material 4 stored inside the chemical heat storage reactor 2a and the outside, and is composed of, for example, a heat exchange tube installed in a serpentine manner inside the chemical heat storage reactor 2a, or the inner cylindrical part of a double-cylindrical reactor.

[0041] [Effect of reactant gas supply in chemical heat storage reactor] The movement of the reaction gas 8 and the reaction of the chemical heat storage material 4 in the chemical heat storage reactor 2a of this embodiment will be described with reference to FIG. 3(A).

[0042] When the valve 10 provided in the communication section 7 is opened and the chemical heat storage reactor 2a and the condenser 3 are connected as a single space, the reaction gas 8 that has passed through the communication section 7 and the opening 6 outside the chemical heat storage reactor 2a is led to the internal space 23 from the side (upstream side) of the opening 6 of the reaction gas supplier 22a. The reactive gas 8 in the internal space 23 moves from the upstream side to the downstream side of the internal space 23, and reacts with the chemical thermal storage material 4 from the gas supply units 26 on both sides of the internal space 23. The reactive gas 8 that has not reacted with the chemical thermal storage material 4 is guided so as to collide with the surface of the collapse suppression member 27 on the back side of the gas supply unit 26. The reactive gas 8 that has collided with the collapse suppression member 27 is redirected towards the chemical thermal storage material 4. Then, the redirected reactive gas 8 passes through the gas supply unit 26 and reacts with the chemical thermal storage material 4 (reactive gas 8a), or passes through a flow path leading to the further downstream side (reactive gas 8b), and then collides with the surface of the collapse suppression member 27 on the further downstream side, whereby its direction is changed.

[0043] As described above, there is an effect that the chemical heat storage material 4 and the reactive gas 8 easily react uniformly from the upstream side to the entire downstream side. The chemical heat storage material 4 and the reactive gas 8 react to create a heat dissipation state, and the heat is extracted to the outside via the heat exchange piping 5 and is utilized.

[0044] Thereafter, when heat is supplied from the heat exchange pipe 5 and added to the chemical heat storage material 4, a reaction occurs in which the reaction gas 8 moves to the condenser 3 side. In this state, the valve 10 of the communication part 7 is closed, and the chemical heat storage device 11a enters a heat storage state.

[0045] As described above, when heat dissipation and heat storage are repeated, the chemical thermal storage material 4 becomes biased in the direction of gravity, and a crushing pressure 29 is generated against the wall member 24 of the reactive gas supply body 22a. Even in a state in which this crushing pressure 29 is generated, the crush suppression members 27 support the wall members 24 so that they do not crush each other, while a flow path for the reactive gas 8 is secured, so that the durability of the reactive gas supply body 22a can be improved, and a state in which the chemical thermal storage material 4 and the reactive gas 8 are likely to react can be easily maintained for a long period of time, uniformly from the upstream side to the entire downstream side.

[0046] In this embodiment, a case in which a housing filled with a crush suppression member is used has been exemplified, but a porous metal foam, which is an open-cell body in which the bubbles are interconnected, may also be used. FIG. 4 illustrates a case in which a cylindrical metal foam is used, but the shape is not limited thereto. The portion in the metal foam where the bubbles are interconnected corresponds to the flow path through which the reaction gas 8 passes, and the reaction gas 8 is supplied to the chemical thermal storage medium 4. Furthermore, the opening of the metal foam facing the chemical thermal storage medium 4 (the opening on the surface of the metal foam) corresponds to the gas supply portion 26. Because the metal foam is a solid object with many pores provided inside, it is less likely to be crushed due to the presence of the solid object inside, even when crushing pressure 29 is generated.

[0047] [Second embodiment] 5 is a schematic plan view illustrating the structure of a chemical heat storage reactor 2b of a chemical heat storage device 1b according to a second embodiment of the present invention. The heat exchange piping 5 is not shown. In this embodiment, the structure of the reaction gas supply body 22b of the chemical heat storage reactor 2b is different. In this embodiment, a plate-shaped porous body is used as the reaction gas supply body 22b.

[0048] <Reaction gas supplier> The reaction gas supply 22 is housed inside the container 21 and is a component for guiding the reaction gas 8, which is the reaction medium 9, that has passed through the communication section 7 to the rear side (downstream side of the reaction gas supply 22) opposite to the opening 6 side (upstream side of the reaction gas supply 22). As shown in FIG. 5, in this embodiment, the reactive gas supplier 22b is a plate-shaped porous body, and the plate-shaped body 201 has plate-shaped members 202a and 202b.

[0049] <Plate-shaped body> 6(C), the plate-shaped body 201 has a plurality of through holes 203 formed in the plate thickness direction. The plate-shaped body 201 has a plate-shaped member 202a and a plate-shaped member 202b. The plate-shaped member 202a has a plate-shaped portion 204a and a plurality of through holes 203a, and the plate-shaped member 202b has a plate-shaped portion 204b and a plurality of through holes 203b.

[0050] The plate-like body 201 is provided in a state where the through-hole 203a (FIG. 6(A)) of the plate-like member 202a on one side and the through-hole 203b (FIG. 6(B)) of the plate-like member 202b on the other side are shifted in position and overlap each other (FIG. 6(C)), and the plate-like portion 204a and the plate-like portion 204b are in contact with each other to form an overlapping portion 30. The plate-like body 201 may be formed by stacking three, four, five, or more plate-like members 202. The plate-like body 201 is formed by stacking a plurality of plate-like members 202 to form a single plate, which becomes a plate-like porous body. The plate-like member 202 may be a metal plate material called a punched metal, which has a large number of through-holes.

[0051] Furthermore, the diameters of the through holes 203a and the through holes 203b are not particularly limited as long as they are designed to be large enough not to prevent the reactant gas 8 from reaching the chemical thermal storage material 4 when they are stacked. However, if all of the through holes 203a and all of the through holes 203b have the same diameter and are arranged at the same intervals, this has the effect of simplifying the manufacture of the plate-like member 202. Furthermore, the diameters of the through holes 203a and the through holes 203b may be different between the upstream side and the downstream side, and the through holes 203a and the through holes 203b may be designed to differ between the upstream side and the downstream side, and may be designed so that a difference occurs in the amount of the reactant gas 8 passing through between the upstream side and the downstream side.

[0052] As shown in Fig. 7, the plate-like bodies 201 are stacked so that the through-hole 203a on one side of the upstream side is connected to the through-hole 203b on the other side, and the through-hole 203b on the other side is connected to the through-hole 203a on one side of the downstream side. By connecting the through-holes 203a and 203b in this manner, the space of the through-hole 203 snakes left and right and connects to the downstream side. In other words, the reactant gas 8 can snake from upstream to downstream in the order of the through-hole 203a on one side, the through-hole 203b on the other side, and the through-hole 203a on the downstream side.

[0053] The material of the plate-like body 201 is not particularly limited as long as it is a material or structure that is not easily deformed when crushed by the crushing pressure 29, but metal is preferable. Metal has good thermal conductivity, and the plate-like body 201 is heated by the reaction gas 8, and the heat is transferred to the chemical thermal storage material 4 on the downstream side, causing the temperature of the chemical thermal storage material 4 on the downstream side to rise, which is preferable because it can increase the reaction rate. In this embodiment, since the plate-shaped body 201 is used, both sides of the reactive gas supplier 22b come into contact with the chemical heat storage material 4, increasing the contact area (area for supplying heat) between the plate-shaped body 201 and the chemical heat storage material 4, making it possible to efficiently transfer heat from the plate surface of the plate-shaped body 201 to the downstream side (rear side) of the chemical heat storage material 4, which has the effect of efficiently increasing the reaction rate of the chemical heat storage material 4 on the downstream side.

[0054] 7, in the reactive gas supply body 22b, the space (flow path) through which the reactive gas 8 moves meanders and connects from the upstream side to the downstream side, and there is no need to ensure an internal space through which the reactive gas 8 moves in a straight line from the upper end to the lower end of the reactive gas supply body 22b. In this way, since there is no need to provide a straight internal space, the area occupied by the reactive gas supply body 22b in the container 21 can be reduced. Therefore, a large amount of chemical thermal storage medium 4 can be placed in the container 21, which is preferable.

[0055] As shown in Figure 8, the overlapping portion 30, in which the plate-shaped portion 204a and the plate-shaped portion 204b are overlapped and in contact with each other, spans the plate-shaped portion 204a and the plate-shaped portion 204b and corresponds to the clogged portion inside the porous body. Even when the chemical heat storage material 4 reacts with the reactive gas 8, repeatedly releasing and storing heat, and the pressure on the downstream side (rear side) of the reactive gas supply body 22b increases, and pressure (crushing pressure 29) is applied to the reactive gas supply body 22b in a crushing direction, the presence of the overlapping portion 30, which is a clogged object part inside, makes it difficult for the plate-shaped body 201 to be deformed and crushed by the crushing pressure 29, thereby increasing the durability of the reactive gas supply body 22b and making it easy to secure a downstream flow path through which the reactive gas 8 passes, which is preferable.

[0056] Other features The portion of the through-hole 203a on the plate-shaped member 202b side is a flow path through which the reactant gas 8 flows, and the opening of the through-hole 203a on the chemical thermal storage medium 4 side corresponds to the gas supply unit 26a. Furthermore, the portion of the through-hole 203b on the plate-shaped member 202a side is a flow path through which the reactant gas 8 flows, and the opening of the through-hole 203b on the chemical thermal storage medium 4 side corresponds to the gas supply unit 26b.

[0057] 7, the downstream side walls of the through hole 203a of the plate-shaped member 202a and the through hole 203b of the plate-shaped member 202b correspond to the diffusion sections 28a and 28b. When the reactant gas 8 passes from the upstream side, the reactant gas 8 collides with the diffusion section 28a or 28b, and the reactant gas 8 is redirected toward the chemical thermal storage medium 4. The redirected reactant gas 8 passes through the gas supply section 26a or 26b and reacts with the chemical thermal storage medium 4 (reactant gas 8a), passes through a flow path leading to the further downstream side (reactant gas 8b), and then collides with the diffusion section 28b on the further downstream side, whereby its direction is changed.

[0058] As described above, the reactive gas 8 from the upstream side is converted in the direction of the chemical thermal storage material 4 by the diffusion section 28a or 28b, making it easier for the reactive gas 8 to be guided throughout the gas supply section 26a and the gas supply section 26b of the reactive gas supplier 22.

[0059] In addition, the reactive gas supply body 22b may be placed in a container or bag made of a metal mesh, or a mesh-like member may be placed between the chemical thermal storage material 4 and the chemical thermal storage material 4 to prevent the chemical thermal storage material 4 from entering and blocking the through holes of the gas supply section 26b.

[0060] [Effect of reactant gas supply in chemical heat storage reactor] The movement of the reaction gas 8 when the reaction gas 8 reacts in the chemical heat storage reactor 2b of this embodiment will be described with reference to FIG.

[0061] The reaction gas 8 that has passed through the communication part 7 and the opening 6 outside the chemical heat storage reactor 2b is led to the through-hole 203 of the plate-like body 201 from the opening 6 side (upstream side) of the reaction gas supplier 22b. The reactive gas 8 introduced into the through-hole 203 moves from the upstream side to the downstream side of the through-hole 203 and collides with the diffusion section 28a or 28b. The colliding reactive gas 8 is redirected towards the chemical thermal storage medium 4. The redirected reactive gas 8 passes through the gas supply section 26a or 26b and reacts with the chemical thermal storage medium 4 (reactive gas 8a), passes through a flow path leading to the further downstream side (reactive gas 8b), and collides with the diffusion section 28b or 28a on the further downstream side, where its direction is changed.

[0062] As described above, by changing the direction of the reactive gas 8 introduced from the upstream side toward the chemical thermal storage material 4, the reactive gas 8 is more easily introduced to the entire upstream gas supply sections 26a and 26b of the reactive gas supplier 22b and the entire downstream gas supply sections 26a and 26b, making it easier for the entire chemical thermal storage material 4 to react with the reactive gas 8.

[0063] In this embodiment, a plate-like body formed by stacking plate-like members each having a plurality of through-holes is used as an example of the porous body. However, a metal foam, which is a cellular metal structure having many small spaces and in which the cells are interconnected, and has an open-cell structure, may also be used as the plate-like member. That is, the plate-like member 202 may be formed by stacking multiple sheets of open-cell foam metal. Furthermore, the plate-like member 202 may be formed by stacking two types of plate-like members 202, each of which is a perforated metal and a metal foam, or by sandwiching a metal foam between two perforated metals and forming a plate-like member 201 (porous body) from three plate-like members 202. The combination of porous bodies is not limited.

[0064] [Third embodiment] 9 is a schematic explanatory plan view of the structure of a chemical heat storage reactor 2c of a chemical heat storage device 1c according to a third embodiment of the present invention, although the heat exchange piping 5 is not shown. In this embodiment, the chemical heat storage reactor 2b has a structure different from that of the chemical heat storage reactor 2b in that a plurality of plate-shaped bodies 201 are used and arranged so as to intersect with each other in the thickness direction of the plate-shaped bodies 201 to form a chemical heat storage reactor c.

[0065] In the chemical heat storage reactor 2c of this embodiment, multiple plate-like bodies 201 are arranged in a lattice pattern from the upstream side to the downstream side, crossing each other in the plate thickness direction, thereby increasing the contact area between the plate-like bodies 201 and the chemical heat storage material 4, and achieving a structure that enables heat to be efficiently transferred from the plate surface of the metal plate-like body 201 to the downstream side (rear side) of the chemical heat storage material 4. Furthermore, if plate-like bodies 201 are arranged in a lattice pattern inside the container 21 so that the end faces of the plate-like bodies come into contact with the inner surface of the container 21, the effect of suppressing deformation of the container 21 is enhanced.

[0066] [Other embodiments] In the second embodiment of the present invention, the plate-like body 201 in which plate-like members 201a and 201b are stacked is exemplified as the porous body. However, as shown in FIGS. 10 and 11 , when an open-cell foam metal is used as the plate-like body 201, it is not necessary to stack a plurality of plate-like members 202, and a single plate-like porous body that is a foam metal may be used as the plate-like body 201. In this case, since a single plate-like porous body is configured as the plate-like body 201, it is easy to handle. Furthermore, since the foam metal is made of metal, it has good thermal conductivity and is effective in transferring heat from the reaction gas to the chemical thermal storage medium, thereby improving the reaction rate. Furthermore, if it is a single plate-like foam metal, the contact area (area that supplies heat) between the porous plate-like body 201 and the chemical thermal storage medium 4 is increased, and there is an effect that heat can be efficiently transferred from the plate surface of the plate-like body 201 to the downstream side (rear side) of the chemical thermal storage medium 4.

[0067] As shown in FIG. 12, in the third embodiment of the present invention, the plate-shaped body 201 may be a single plate-shaped foam metal, and multiple plate-shaped bodies 201 may be arranged in a lattice pattern, crossing each other in the thickness direction. [Industrial Applicability]

[0068] The chemical heat storage device and the heat storage method for chemical heat storage material of the present invention are suitably used as a means for effectively utilizing exhaust heat (waste heat) from heat sources that generate heat during operation, such as driving engines such as engines, as well as factories and facilities that perform combustion treatment (such as waste incineration facilities). [Explanation of symbols]

[0069] 1a, 1b, 1c...chemical heat storage device, 2a, 2b, 2c...chemical heat storage reactor, 3...condenser, 4...chemical heat storage material, 5...heat exchange piping, 6...opening, 7...communicating portion, 8...reactant gas, 9...reactant medium, 10...valve, 21...container, 22a, 22b...reactant gas supply body, 23...internal space, 24...wall member, 25...missing number, 26, 26a, 26b...gas supply portion, 27...collapse suppression member, 28a, 28b...diffusion portion, 29...crushing pressure, 30...overlapping portion, 201...plate-shaped body, 202, 202a, 202b...plate-shaped members, 203, 203a, 203b...through holes, 204a, 204b...plate-shaped portion.

Claims

1. A container and A chemical heat storage material accommodated inside the container; A reaction gas supplier that is housed inside the container and that guides a reaction gas used in a reaction of the chemical thermal storage material to the chemical thermal storage material, the reaction gas supply body is a plate-like body having through holes, the plate-like body has two or more plate-like members each having a plurality of through holes formed in a plate thickness direction, the plate-like members being stacked with their positions shifted such that the through holes of one of the plate-like members and a portion of the through holes of the other of the plate-like members overlap each other; A chemical heat storage reactor characterized in that the reaction gas is branched into a flow that passes through the through holes and a flow that flows toward the chemical heat storage material.

2. 2. The chemical heat storage reactor according to claim 1, wherein the reaction gas supply body is a plurality of plate-like bodies arranged so as to intersect with each other in the plate thickness direction of the plate-like bodies.

3. A chemical heat storage reactor as described in claim 1 or 2, characterized in that the reaction gas supply is stored in a container or bag made of metal mesh, or a mesh-like member is provided between the reaction gas supply and the chemical heat storage material.

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