WO2022185680A1

WO2022185680A1 - Chemical heat storage reactor

Info

Publication number: WO2022185680A1
Application number: PCT/JP2021/047451
Authority: WO
Inventors: 宗樹西村
Original assignee: 住友重機械工業株式会社
Priority date: 2021-03-01
Filing date: 2021-12-21
Publication date: 2022-09-09
Also published as: JPWO2022185680A1; CN116761976A

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

chemical heat storage reactor

The present invention relates to a chemical heat storage reactor of a chemical heat storage reactor.

Chemical heat storage, which stores heat and releases heat using chemical reactions and enables storage of thermal energy at room temperature, is used in driving engines such as engines, as well as in factories and facilities for combustion processing (waste incineration facilities, etc.). Research and development are proceeding from the viewpoint of effectively utilizing waste heat (waste heat) from heat sources that generate heat.

A chemical heat storage reaction apparatus for performing chemical heat storage generally uses a solid chemical heat storage medium. It is configured such that heat can be released to the outside of the chemical heat storage reaction device by causing an exothermic reaction with the reaction gas.

As such a chemical heat storage reactor, for example, the chemical heat storage reactor described in Patent Document 1 is exemplified. In Patent Document 1, when a steam flow path is created by simply bending a plate material into a rectangular wave shape (unevenness), the chemical heat storage material expands due to a hydration reaction and shrinks due to a dehydration reaction, thereby forming a flow path. There is a description that it is possible that it will be crushed.

JP 2014-115060 A

Therefore, in the chemical heat storage reactor described in Patent Document 1, pressing portions extending in the direction in which the chemical heat storage materials are arranged (the Y direction in FIG. 1 of Patent Document 1) are provided at both ends of a plate member bent into a rectangular wave shape. is bent and provided continuously, and the pressing portion is arranged so as to be sandwiched between the wall portion of the reaction vessel and the chemical heat storage material. In this state, when the chemical heat storage material expands, the pressing portion is pressed toward the wall, thereby suppressing the movement of the pressing portion. It is described that this suppresses movement of both ends of the plate material bent into a rectangular wave shape in the approaching direction (the Z direction in FIG. 1 of Patent Document 1), and suppresses crushing of the portion bent into a rectangular wave shape. It is
However, even with a structure such as that disclosed in Patent Document 1, there is a possibility that sufficient strength of the flow path through which the steam passes cannot be ensured only by the structure in which the plate material is bent. Therefore, it is required to suppress crushing by a different structure.

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 less likely to be crushed.

As a result of intensive studies on the above-mentioned problems, in the chemical heat storage reactor, the reaction gas supply body for guiding the reaction gas used for the reaction of the chemical heat storage material to the chemical heat storage material is filled with a porous body or a collapse suppressing member. The inventors have found that the reaction gas supply is less likely to be crushed and the reaction gas is more likely to be guided to the entire chemical heat storage material, and the present invention has been completed.
That is, the present invention is the following chemical heat storage reactor.

The chemical heat storage reactor of the present invention for solving the above problems comprises: a container; and a reactant gas supply body leading to the material, wherein the reactant gas supply body comprises a casing filled with a porous body or a collapse suppressing member.
According to this chemical heat storage reactor, the collapsing suppression means provided in the reaction gas supply body suppresses the collapse of the reaction gas supply body, so that the reaction gas can be easily supplied to the entire chemical heat storage material.

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 plate-like, the volume of the reaction gas supply can be reduced, and the proportion of the volume in the container can be reduced.
Furthermore, the contact area between the plate-shaped body and the chemical heat storage material is increased, and heat can be efficiently transmitted from the plate surface of the plate-shaped body to the downstream side (back side) of the chemical heat storage material. has the effect of increasing the reaction rate of

Further, as one embodiment of the chemical heat storage reactor of the present invention, the plate-like body has two or more plate-like members provided with a plurality of through holes in the plate thickness direction, and one side of the plate-like member and a part of the through-hole of the plate-like member on the other side are shifted and superimposed so as to overlap each other.
According to this feature, two or more plate-like members are overlapped so that the through-hole of the plate-like member on one side and a part of the through-hole of the plate-like member on the other side overlap with each other. By combining them, there is an effect that the manufacture of the plate member is simple.

Further, as 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 to intersect each other in the thickness direction of the plate-like bodies.
According to this feature, since the plate-shaped bodies are arranged to cross each other in the plate thickness direction, the contact area between the plate-shaped bodies and the chemical heat storage material can be increased, and the reaction gas warms the contact surface. Heat can be applied to the chemical heat storage material via the plate-shaped body, which has the effect of improving the reaction speed of the chemical heat storage material.

According to the present invention, it is possible to provide a chemical heat storage reactor in which the reaction gas supply body is less likely to be crushed.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic explanatory drawing which shows the structure of the chemico-thermal-storage device of the 1st embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic explanatory drawing which shows the state which planarly viewed the inside of the chemical heat storage reactor of the chemical heat storage apparatus of the 1st embodiment of this invention. FIG. (A) is a sectional view taken along the line AA in FIG. FIG. (B) is a partially enlarged view of FIG. (A). FIG. 4 is a schematic explanatory diagram showing a plan view of the inside of the chemical heat storage reactor of the chemical heat storage device of the modified example of the first embodiment of the present invention. FIG. 4 is a schematic explanatory diagram showing a plan view of the inside of the chemical heat storage reactor of the chemical heat storage device of the second embodiment of the present invention. FIG. 4A is a schematic diagram showing a reactive gas supply body according to a second embodiment of the present invention, FIG. FIG. (B) is a schematic diagram of the plate-like member on the other side before being superimposed as a plate-like body. FIG. (C) is a schematic diagram of a plate-like body in which a plate-like member on one side and a plate-like member on the other side are superimposed; FIG. 6C is a schematic diagram showing a portion of the chemical heat storage material and the plate-like body in the BB cross section of FIG. 6(C). FIG. 6C is a schematic diagram showing a portion of the chemical heat storage material and the plate-like body in the CC cross section of FIG. 6(C); FIG. 10 is a schematic explanatory diagram showing a plan view of the inside of the chemical heat storage reactor of the chemical heat storage device of the third embodiment of the present invention. FIG. 5 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 modification of the second embodiment of the present invention. FIG. 11 is a schematic diagram showing a part of the chemical heat storage material and the plate member in the DD section of FIG. 10; FIG. 11 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 modification of the third embodiment of the present invention.

The chemical heat storage device and the heat storage method of the chemical heat storage material of the present invention are exhaust heat from heat sources that generate heat during operation, such as driving engines such as engines, factories and facilities for combustion treatment (waste incineration facilities, etc.). (Waste heat) is stored in a chemical heat storage material, and when heat is required, heat is released from the heat storage product, thereby making it possible to utilize the heat. In addition, the chemical heat storage device of the present invention may be used as a heat supply source while being fixed at a predetermined position. It can be a thing.

Further, in the chemical heat storage device and the heat storage method of the chemical heat storage material of the present invention, the chemical heat storage material is heated to separate the heat storage product and the generated gas during heat storage, and the heat storage product and the reaction gas are reacted during heat dissipation. It produces a chemical heat storage material. Here, the generated gas generated during heat storage and the reaction gas supplied during heat release are preferably of the same type. Then, in the liquefaction step of condensing the generated gas and recovering it as a reaction liquid, and the vaporization step of evaporating the reaction liquid obtained in the liquefaction step and using it as a reaction gas, the reaction related to chemical heat storage proceeds, and the chemical heat storage material It is possible to store and release heat. In addition, hereinafter, the generated gas and the reaction gas may be referred to as "reaction medium".

As a general reaction related to chemical heat storage in the present invention, for example, a reaction such as the following formula (1) is exemplified.

When heat Q is applied to the solid chemical heat storage material AB, a solid heat storage product A and a gaseous reaction medium B are generated, and heat can be stored by the endothermic reaction at this time. This reaction is a reversible equilibrium reaction, and the heat storage product A and the reaction medium B react during heat release. "(s)" in the formula represents a solid state, and "(g)" in the formula represents a gaseous state.

In a conventional chemical heat storage device, during heat storage, a reaction medium B (produced gas) generated by adding heat Q to the chemical heat storage material AB in the reactor is introduced into the evaporator/condenser, and on the evaporator/condenser side, By dissipating the heat possessed by the reaction medium B (produced gas), the temperature of the reaction medium B (produced gas) is lowered, the reaction medium B (produced gas) is liquefied by the condensation reaction, and is recovered as a reaction liquid. . At this time, all of the collected reaction liquid is stored in the evaporator/condenser, so in order to store the reaction liquid, a container that constitutes the evaporator/condenser must have a certain amount of space. becomes. Therefore, the consumption of energy required for the temperature drop of the reaction medium B (produced gas) increases due to the influence of the sensible heat of the container itself.

Also, during heat dissipation, the reaction proceeds in the opposite direction to that during heat storage. On the evaporator/condenser side, heat is applied to the reaction liquid to vaporize it into reaction medium B (reaction gas), and on the reactor side , the reaction medium B (reaction gas) and the heat storage product A react with each other, and heat is radiated by the exothermic reaction that produces the chemical heat storage material AB. At this time, since all the reaction liquid in the evaporator/condenser is heated, more energy than necessary is consumed in order to generate the amount of reaction gas required for the exothermic reaction on the reactor side. .

On the other hand, in the chemical heat storage device and the heat storage method of the chemical heat storage material of the present invention, when performing heat storage and heat release based on the reaction of formula (1), the reaction liquid used for the reaction of the chemical heat storage material AB undergoes condensation and evaporation. In the liquefaction process in which the generated gas is condensed and recovered as a reaction liquid by storing it separately from the place where heat exchange is performed, and in the vaporization process in which the reaction liquid obtained in the liquefaction process is evaporated and used as the reaction gas, It is possible to perform heat storage and heat dissipation related to chemical heat storage without consuming the above energy. As a result, compared with the conventional chemical heat storage device, energy loss can be suppressed, and the reaction related to chemical heat storage can be favorably advanced.

Preferred embodiments of the present invention will be described in detail below with reference to the drawings.
In the present invention, by applying a porous body or a housing filled with a collapse suppressing member to the reaction gas supply body, the reaction gas supply caused by repeated expansion and contraction due to the reaction of the chemical heat storage material. Even if the pressure (crushing pressure) that tries to crush the body is generated, the passage through which the reaction gas passes is made difficult to be crushed, and the reaction gas is easily guided to the entire chemical heat storage material.

A porous body corresponds to an object with a large number of holes provided in an object with a clogged interior. For example, it is a metal cellular structure having a large amount of small spaces (bubbles), and a foam metal that is an open cell body in which those bubbles are connected to each other, and a plate-like member with multiple through holes in the plate thickness direction. The porous body corresponds to a porous body in which the through-holes of a plurality of plate-like members are superimposed with their positions shifted from each other.

In addition, in the case of a housing filled with a crush-suppressing member, it is possible to secure a flow path (passing space) for the reactant gas and to withstand the crushing pressure. An example of the suppressing member is a member filled inside the housing. Specifically, in addition to metals, crushed stones, ceramics, and other inorganic materials, PCM capsules that play the role of latent heat storage may be used as crushing suppression members.
A PCM capsule is a latent heat storage material (PCM is an abbreviation for Phase Change Material) enclosed in a metal capsule, and the latent heat storage material repeats melting and solidification to absorb and release heat. . When the PCM capsule reaches a high temperature, the latent heat storage material inside melts and becomes liquid, but the metal capsule on the outside is in a solid state. It is possible to secure the flow path of the reactant gas.
The housing may have a cylindrical shape or a prismatic shape, 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.

Incidentally, the chemical heat storage device and the heat storage method of the chemical heat storage material described in the embodiments are merely exemplified for explaining the heat storage method of the chemical heat storage device and the chemical heat storage material according to the present invention, and the same effect can be obtained. As long as it is not limited to these.

[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 the 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 medium 4, and a condenser 3 that condenses the gas generated from the chemical heat storage medium 4 and stores a reaction medium 9 therein. The inside of the chemical heat storage reactor 2a and the inside of the condenser 3 are airtightly connected via the communication portion 7. As shown in FIG. A heat exchange pipe 5 through which a heat medium such as exhaust gas passes is provided inside the chemical heat storage reactor 2a. Further, the communication portion 7 is connected to the opening portion 6 of the chemical heat storage reactor 2a. The communicating portion 7 is provided with a valve 10 capable of controlling the movement of the generated gas between the chemical heat storage reactor 2a and the condenser 3. As shown in FIG.

(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. are connected by The condenser 3 is adjusted to a temperature at which the reaction medium 9 generated as a gas is condensed, and when the gaseous reaction medium 9 flows into the condenser 3, it is condensed into a liquid state. Adjustment of the temperature of the condenser 3 is not particularly limited, and it may be cooled by a cooling device or the like, or may be cooled by natural heat radiation.

(Chemical heat storage reactor)
The chemical heat storage reactor 2a will be described with reference to FIGS. 2 and 3. FIG. 2 and 3, the heat exchange pipe 5 is not shown. The chemical heat storage reactor 2 a includes a container 21 , a reaction gas supply 22 a, a chemical heat storage material 4 and heat exchange pipes 5 .

<Container>
The container 21 is configured to hold the chemical heat storage material 4 and is made of a sealable structure.
Although the shape and material of the container 21 are not particularly limited, it preferably has pressure resistance. The pressure resistance suppresses the change in the internal volume due to the change in the pressure inside the container 21, so that there is an effect that the internal pressure can be easily controlled. The shape and material of the container 21 are not particularly limited. The container 21 is provided with an opening 6 through which the reaction medium 9 desorbed from the chemical heat storage material 4 flows in and out, and the opening 6 is connected to the communicating portion 7 .

<Reactive gas supplier>
The reaction gas supply body 22a is accommodated inside the container 21, and the reaction gas 8, which is the reaction medium 9 supplied from the communication part 7, is separated from the opening part 6 side (upstream side of the reaction gas supply body 22a). It is a member for leading to the opposite back side (downstream side of the reaction gas supply body 22a). That is, the reaction gas supply body 22a is for guiding the reaction gas 8 over the entirety of the chemical heat storage material 4 from the upstream side to the downstream side, and is filled with a porous body or a collapse suppressing member 27 inside. can be applied.
As the porous body, it is possible to use a metal cellular structure having a large amount of small spaces, which is called an open-cell metal foam in which the cells are connected to each other.

The reaction gas supply body 22a of this embodiment shown in FIG. , and a collapse suppressing member 27 .
The housing may have a cylindrical shape or a prismatic shape, 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 heat storage material 4 .

≪Wall materials≫
The wall member 24 is arranged so as to surround the internal space 23 of the housing, secures the internal space 23 , and allows the reaction gas 8 to pass through the internal space 23 . The wall member 24 has a gas supply section 26 for guiding the reaction gas 8 in the internal space 23 to the chemical heat storage material 4 . The gas supply part 26 is a through-hole, and is individually provided in the wall member 24 . The gas supply unit 26 is provided over the entire area from the opening 6 side (upstream side) to the back side (downstream side).

≪Collapse control member≫
The crushing suppression member 27 serves to prevent the housing from being crushed by the crushing pressure 29 generated in the internal space 23 by repeated expansion and contraction due to reaction of the chemical heat storage material 4 .
The crushing suppressing member 27 is an object that fills the internal space 23 inside the housing. The crushing suppressing member 27 has an uneven surface, and the crushing suppressing member 27 can be made of a material that can withstand the crushing pressure 29 generated by repeated expansion and contraction of the chemical heat storage material 4 . The gaps between the plurality of collapse suppressing members 27 serve as flow paths, and the reaction gas 8 passes through the flow paths (the gaps between the crush suppressing members 27) in a meandering manner, thereby passing through the gas supply section 26 from the internal space 23. reacts with the chemical heat storage material 4.

In the present embodiment, the case where a plurality of crushing suppression members 27 are filled inside is illustrated, but the crushing suppression members 27 can secure a gap through which the reaction gas 8 passes, and the chemical heat storage material 4 There is no particular limitation as long as the material, object, or structure can withstand the crushing pressure 29 generated by repeated expansion and contraction. For example, the collapse suppressing member 27 may be a PCM capsule that plays a role of latent heat storage, in addition to inorganic materials such as metal, crushed stone, and ceramics.
In addition, it is desirable that the collapse suppressing member 27 has a size that does not block the penetration of the gas supply portion 26 into the through hole.

When the chemical heat storage material 4 reacts with the reaction gas 8 and heat radiation and heat storage are repeated, expansion and contraction of the volume of the chemical heat storage material 4 are repeated. As a result, the pressure on the downstream side (back side) of the reactive gas supply body 22a increases, and the reaction gas supply body 22a is put in a state of being crushed (crushing pressure 29). If the downstream side (back side) of the reaction gas supply body 22a is crushed, the reaction gas 8 may be difficult to be introduced downstream (back side), and the reaction of the chemical heat storage material 4 on the downstream side may be difficult to occur.

In the present invention, when the crushing pressure 29 is generated, the crushing suppressing members 27 come into contact with each other and support each other, so that the wall member 24 of the reaction gas supply body 22a is crushed and the flow path through which the reaction gas 8 passes is opened. less likely to be clogged. Therefore, even if the crushing pressure 29 is generated, the durability of the reaction gas supply body 22a can be improved, so that the flow path can be easily secured, and the reaction gas 8 can be guided to the back side (downstream side) of the gas supply part 26. It has the effect of making it easier to

In addition, the reaction gas supplier 22a is placed in a container or bag made of a metal mesh, or a mesh-like member so that the chemical heat storage material 4 does not enter the through hole of the gas supply part 26 and clog it. may be arranged between the chemical heat storage material 4 and the like.

<Chemical heat storage material>
The chemical heat storage material 4 is a chemical substance that separates into a heat storage product and a product gas when heated, and releases heat by the reverse reaction. For example, as heat storage products and generated gases, 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), Examples include strontium bromide (SrBr2) and ammonia (NH3). From the viewpoint of easy procurement for heat radiation, the chemical heat storage medium 4 preferably uses water vapor as the generated gas and the reaction gas.

The structure and shape of the chemical heat storage material 4 are not particularly limited, and examples thereof include powder, granules, granules, pellets, and flakes. Moreover, a molded body obtained by molding powder, or a porous body in which the chemical heat storage material 4 is supported may be used. From the viewpoint of having a large surface area in order to increase reactivity, it is preferably in the form of powder.

Furthermore, a cartridge in which a powdery chemical heat storage material 4 is filled in a container or bag made of metal mesh may be used. By using a cartridge, it is possible to prevent the chemical heat storage material 4 in powder form from flowing out of the reactor 2 and prevent the chemical heat storage material 4 from being unevenly arranged inside the reactor 2 . In addition, the use of a cartridge facilitates replacement of the chemical heat storage material 4, resulting in an effect of excellent handleability.

<Heat exchange piping>
The chemical heat storage reactor 2a has a heat exchange pipe 5 for transferring heat between the chemical heat storage material 4 held inside and the outside. The heat exchange pipe 5 may have any shape as long as it can transfer heat between the chemical heat storage material 4 housed inside the chemical heat storage reactor 2a and the outside. It is composed of a heat exchange tube installed in a meandering manner inside the reactor, the inner cylindrical portion of a double cylindrical reactor, and the like.

[About the action of the reactant gas supplier in the 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).

The valve 10 provided in the communicating portion 7 is released, and the chemical heat storage reactor 2a and the condenser 3 are connected as one space, so that the communicating portion 7 and the opening 6 outside the chemical heat storage reactor 2a are connected. The reactant gas 8 that has passed through is led to the internal space 23 from the side (upstream side) of the opening 6 of the reactant gas supplier 22a.
The reaction 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 heat storage material 4 from the gas supply units 26 on both sides of the internal space 23 . The reaction gas 8 that has not reacted with the chemical heat storage material 4 is guided so as to collide with the surface of the collapse suppressing member 27 on the back side of the gas supply section 26 . The reactant gas 8 that has collided with the collapse suppressing member 27 is redirected toward the chemical heat storage material 4 . Then, the reactant gas 8 whose direction has been changed passes through the gas supply unit 26 to react with the chemical heat storage material 4 (reactant gas 8a), or further passes through a channel leading to the downstream side (reactant gas 8b). Then, it collides with the surface of the collapse suppressing member 27 on the further downstream side and changes its orientation.

As described above, there is an effect that the chemical heat storage material 4 and the reaction gas 8 easily react uniformly from the upstream side to the downstream side. The chemical heat storage material 4 reacts with the reaction gas 8 to release heat, and the heat is taken out through the heat exchange pipe 5 and utilized.

After that, 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 chemical heat storage device 11a enters the heat storage state by closing the valve 10 of the communication portion 7. As shown in FIG.

As described above, when heat radiation and heat storage are repeated, the chemical heat storage material 4 is biased in the direction of gravity, and a crushing pressure 29 is generated against the wall member 24 of the reaction gas supply body 22a. Even in the state where the crushing pressure 29 is generated, the wall member 24 is supported so that the crushing suppression member 27 is not crushed against each other, and the flow path of the reaction gas 8 is secured. Durability can be improved, and a state in which the chemical heat storage material 4 and the reaction gas 8 are likely to react uniformly from the upstream side to the downstream side can be easily maintained for a long period of time.

In this embodiment, a case is illustrated in which a housing filled with a collapse suppressing member is used, but foam metal, which is a porous body, which is an open-cell body in which cells are connected to each other, may also be used. FIG. 4 illustrates the case of using a cylindrical foam metal, but the shape is not limited. The portion where the foam metal cells are connected to each other corresponds to the passage through which the reaction gas 8 passes, and the reaction gas 8 is supplied to the chemical heat storage material 4 . Also, the openings of the metal foam facing the chemical heat storage material 4 (openings on the surface of the metal foam) correspond to the gas supply section 26 . Since the foam metal is formed by providing a large number of holes in an object with a clogged inside, even if the crushing pressure 29 is generated, it is difficult to be crushed due to the existence of the clogged object inside.

[Second embodiment]
FIG. 5 is a schematic explanatory plan view showing the structure of the chemical heat storage reactor 2b of the chemical heat storage device 1b of the second embodiment of the present invention. Note that the heat exchange pipe 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-like porous body is used as the reaction gas supply body 22b.

<Reactive gas supplier>
The reaction gas supply body 22 is accommodated inside the container 21, and the reaction gas 8, which is the reaction medium 9 that has passed through the communication part 7, is directed to the opposite side of the opening 6 (upstream side of the reaction gas supply body 22). It is a member for guiding to the back side (downstream side of the reaction gas supply body 22).
As shown in FIG. 5, in this embodiment, the reactive gas supplier 22b is a porous plate-like body, and the plate-like body 201 has plate-like members 202a and 202b.

<<Plate>>
As shown in FIG. 6C, the plate-like body 201 is provided with a plurality of through holes 203 in the plate thickness direction. The plate-like body 201 has a plate-like member 202a and a plate-like member 202b. The plate member 202a has a plate portion 204a and a plurality of through holes 203a, and the plate member 202b has a plate portion 204b and a plurality of through holes 203b.

The plate-like body 201 has a through-hole 203a (FIG. 6A) of a plate-like member 202a on one side and a part of a through-hole 203b (FIG. 6B) of a plate-like member 202b on the other side. The plate-like portions 204a and 204b are provided so as to have a superimposed portion 30 in which the plate-like portions 204a and 204b are in contact with each other and superimposed so as to overlap each other (FIG. 6C). The plate-like member 201 may be formed by stacking three, four, or five or more plate-like members 202 . A plurality of plate-like members 202 are superimposed to form a plate-like body 201, which is a plate-like porous body. As the plate-like member 202, a metal plate called punching metal having a large number of through holes can be used.

Also, the diameter of the through-holes 203a and the diameter of the through-holes 203b are not particularly limited as long as they are designed so as not to hinder the reaction gas 8 from reaching the chemical heat storage material 4 in the superimposed state. However, when all through-holes 203a and all through-holes 203b have the same diameter and are arranged at the same intervals, the plate-like member 202 can be manufactured easily. Further, the diameters of the through-holes 203a and 203b may be different between the upstream side and the downstream side, or may be designed so that the amount of the reaction gas 8 passing through the upstream side and the downstream side is different. .

As shown in FIG. 7, the plate-like body 201 is in a state in which the through hole 203a on one side of the upstream side and the through hole 203b on the other side are connected, and the through hole 203b on the other side and the through hole 203b on the downstream side are connected. They are overlapped so as to be connected to the through hole 203a on one side. By connecting the through-holes 203a and 203b in this manner, the space of the through-hole 203 meanders left and right and continues downstream. In other words, the reaction gas 8 can meander through the upstream through-hole 203a on one side, the through-hole 203b on the other side, and the downstream through-hole 203a on the one side in order from the upstream side to the downstream side. becomes.

The material of the plate-like body 201 is not particularly limited as long as it is a material or structure that is hard to be deformed by being crushed by the crushing pressure 29, but is preferably made of metal. In the case of metal, the thermal conductivity is good, the plate-like body 201 is warmed by the reaction gas 8, the heat is transmitted to the chemical heat storage material 4 on the downstream side, and the temperature of the chemical heat storage material 4 on the downstream side rises. , which can increase the reaction rate and is preferred.
In this embodiment, since the plate-shaped body 201 is used, both surfaces of the reaction gas supply body 22b are in contact with the chemical heat storage material 4, and the contact area (area for supplying heat) between the plate-shaped body 201 and the chemical heat storage material 4 increases, heat can be efficiently transmitted from the plate surface of the plate-like body 201 to the downstream side (back side) of the chemical heat storage material 4, and the reaction speed of the chemical heat storage material 4 on the downstream side can be efficiently increased. effective.

As shown in FIG. 7, in the reaction gas supply body 22b, the space (flow path) in which the reaction gas 8 moves meanders and is connected from the upstream side to the downstream side, and the reaction gas supply body 22b is straight from the upper end to the lower end. There is no need to secure an internal space to move in a shape. In this way, since it is not necessary to provide a straight internal space, the area occupied by the reaction gas supply body 22b in the container 21 can be reduced. Therefore, a large amount of the chemical heat storage material 4 can be put in the container 21, which is preferable.

As shown in FIG. 8, the overlapped portion 30, in which the plate-like portion 204a and the plate-like portion 204b are overlapped and in contact with each other, extends over the plate-like portion 204a and the plate-like portion 204b. Corresponds to the part of the object that is filled inside.
The chemical heat storage material 4 reacts with the reaction gas 8, heat is released and stored repeatedly, the pressure on the downstream side (back side) of the reaction gas supply body 22b increases, and the pressure in the direction in which the reaction gas supply body 22b is crushed. Even when the (crushing pressure 29) is applied, since the overlapped portion 30, which is an object portion with a clogged interior, exists, the plate-like body 201 is deformed by the crushing pressure 29 and is difficult to be crushed. This is preferable because the durability of the gas supply member 22b can be increased and the downstream flow path through which the reaction gas 8 passes can be easily secured.

≪Other Functions≫
A portion of the through-hole 203a on the side of the plate-like member 202b is a channel through which the reaction gas 8 flows, and an opening of the through-hole 203a on the side of the chemical heat storage material 4 corresponds to the gas supply portion 26a.
A portion of the through-hole 203b on the side of the plate-like member 202a is a channel through which the reaction gas 8 flows, and an opening of the through-hole 203b on the side of the chemical heat storage material 4 corresponds to the gas supply portion 26b.

As shown in FIG. 7, downstream side walls of the through hole 203a of the plate member 202a and the through hole 203b of the plate member 202b correspond to diffusion portions 28a and 28b. When the reaction gas 8 passes from the upstream side, the reaction gas 8 collides with the diffusion part 28a or 28b, and the direction of the reaction gas 8 is changed toward the chemical heat storage material 4. FIG. The reactant gas 8 whose direction has been changed passes through the gas supply part 26a or 26b to react with the chemical heat storage material 4 (reactant gas 8a), or further passes through a channel leading to the downstream side (reactant gas 8b). Then, the direction is changed by colliding with the diffusion portion 28b on the further downstream side.

As described above, the reaction gas 8 from the upstream side is converted in the direction of the chemical heat storage material 4 by the diffusion part 28a or 28b, so that the gas supply part 26a and the gas supply part 26b of the reaction gas supply body 22 The reaction gas 8 is easily led to the whole.

In addition, the reaction gas supplier 22b is placed in a container or bag made of a metal mesh, or a mesh-like member so that the chemical heat storage material 4 does not enter and block the through hole of the gas supply part 26b. may be arranged between the chemical heat storage material 4 and the like.

[About the action of the reactant gas supplier in the chemical heat storage reactor]
Based on FIG. 7, 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.

The reaction gas 8 that has passed through the communication part 7 and the opening 6 outside the chemical heat storage reactor 2b is directed from the opening 6 side (upstream side) of the reaction gas supply body 22b to the through hole 203 of the plate-like body 201. led to.
The reaction gas 8 guided to the through hole 203 moves from the upstream side to the downstream side of the through hole 203 and collides with the diffusion portion 28a or 28b. The colliding reaction gas 8 is redirected toward the chemical heat storage material 4 . The reactant gas 8 whose direction has been changed passes through the gas supply part 26a or 26b to react with the chemical heat storage material 4 (reactant gas 8a), or further passes through a channel leading to the downstream side (reactant gas 8b). Then, the direction is changed by colliding with the diffusion portion 28b or 28a on the further downstream side.

As described above, the reaction gas 8 introduced from the upstream side is changed in direction toward the chemical heat storage material 4, so that the gas supply units 26a and 26b on the upstream side of the reaction gas supply body 22b and the gas supply units 26a and 26b on the downstream side of the reaction gas supply body 22b The reaction gas 8 is easily introduced to the entirety of the gas supply parts 26 a and 26 b , and the entire chemical heat storage material 4 is easily reacted with the reaction gas 8 .

In this embodiment, the porous body is a plate-shaped body obtained by stacking plate-shaped members having a plurality of through holes. A metal foam, which is an open-cell structure in which cells are connected to each other, may be used as the plate-shaped member. That is, as the plate-like member 202, a plate-like body may be formed by stacking a plurality of plate-like open-cell foam metals. Also, as the plate-like member 202, a punching metal and a foam metal may be superimposed to form a plate-like body 201 (porous body) from two types of plate-like members 202, and the foam metal is sandwiched between two punching metals. , three plate-like members 202 may be formed into a plate-like body 201 (porous body), and the combination as a porous body is not limited.

[Third Embodiment]
FIG. 9 is a schematic explanatory view of the structure of the chemical heat storage reactor 2c of the chemical heat storage device 1c of the third embodiment of the present invention as seen from above. Note that the heat exchange pipe 5 is not shown.
In the present embodiment, a plurality of the plate-like bodies 201 of the chemical heat storage reactor 2b are used, and the chemical heat storage reactors c are arranged so as to cross each other in the thickness direction of the plate-like bodies 201. The structure is different from that of the chemical heat storage reactor 2b.

In the chemical heat storage reactor 2c of the present embodiment, a plurality of plate-like bodies 201 intersect each other in the plate thickness direction and are arranged in a lattice form from the upstream side to the downstream side so that the plate-like bodies 201 and the chemical heat storage The contact area with the material 4 is increased, and the structure is such that heat can be efficiently transmitted from the plate surface of the metal plate-like body 201 to the downstream side (back side) of the chemical heat storage material 4 .
Further, if the plates 201 are arranged in a grid pattern inside the container 21 so that the end surfaces of the plates 201 are in contact with the inner surface of the container 21, the deformation of the container 21 can be more effectively suppressed.

[Other embodiments]
In the second embodiment of the present invention, the porous body is the plate-like body 201 in which the plate-like members 201a and 201b are superimposed. When 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 made of foam metal may be used as the plate-like body 201 . In this case, since one plate-like porous body is configured as the plate-like body 201, it is easy to handle. In addition, since the foam metal is made of metal, it has good thermal conductivity, and has the effect of transferring heat from the reaction gas to the chemical heat storage material to improve the reaction rate. Furthermore, in the case of a sheet of foamed metal plate, the contact area (area where heat is supplied) between the porous plate 201 and the chemical heat storage material 4 increases, and the heat is transferred from the plate surface of the plate 201. can be efficiently transmitted to the downstream side (back side) of the chemical heat storage material 4 .

In addition, as shown in FIG. 12, in the third embodiment of the present invention, the plate-like body 201 is a sheet of foamed metal plate, and a plurality of plate-like bodies 201 intersect each other in the plate thickness direction. It may be applied by arranging it in a grid pattern.

The chemical heat storage device and the heat storage method of the chemical heat storage material of the present invention are exhaust heat from heat sources that generate heat during operation, such as driving engines such as engines, factories and facilities for combustion treatment (waste incineration facilities, etc.). It is preferably used as means for effectively utilizing (waste heat).

1a, 1b, 1c... Chemical heat storage device 2a, 2b, 2c... Chemical heat storage reactor 3... Condenser 4... Chemical heat storage material 5... Heat exchange pipe 6... Opening 7... Communicating part 8... Reaction gas 9 Reaction medium 10 Valve 21 Container 22a, 22b Reaction gas supplier 23 Interior space 24 Wall member 25 Missing number 26, 26a, 26b Gas supply part 27 Collapse suppression member 28a, 28b Diffusion portion 29 Crushing pressure 30 Overlapping portion 201 Plate-like body 202, 202a, 202b Plate-like member 203, 203a, 203b Through hole 204a, 204b... Plate-like portion.

Claims

a container;
a chemical heat storage material housed inside the container;
a reaction gas supplier that is housed inside the container and guides the reaction gas used for the reaction of the chemical heat storage material to the chemical heat storage material;
The chemical heat storage reactor, wherein the reactive gas supply body is a porous body or a casing filled with a collapse suppressing member.
The chemical heat storage reactor according to claim 1, wherein the porous body is a plate-like body.
The plate-like body has two or more plate-like members provided with a plurality of through-holes in a thickness direction, and the through-holes of the plate-like member on one side and the plate-like member on the other side. 3. The chemical heat storage reactor according to claim 2, wherein the portions of the through-holes of the and the through-holes are shifted and superimposed so as to overlap each other.
4. The chemical heat storage reactor according to claim 2, wherein the reaction gas supply member is composed of a plurality of plate-like bodies arranged to cross each other in the thickness direction of the plate-like bodies.