JP2016020775A - Chemical heat storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chemical heat storage device capable of enhancing efficiency of heat exchange between an adsorbent and ambient air.SOLUTION: A chemical heat storage device 10 includes: a reactor having a reaction material 13 that chemically reacts with NHto generate heat; and adsorber 12 connected to the reactor 11, and having an adsorbent 14 adsorbing NH. The adsorber 12 includes: a plurality of cooling plates 21 provided side by side so as to be opposite to each other; and a plurality of cylindrical adsorbent storage pipe 23 extending along the juxtaposition direction of the cooling plates, provided so as to penetrate the plurality of cooling plates 21, and storing the adsorbent 14.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a chemical heat storage device that heats, for example, exhaust gas discharged from an engine.

As a conventional chemical heat storage device, for example, as described in Patent Document 1, a heating object provided in an exhaust system of an internal combustion engine of a vehicle is heated by a chemical reaction using ammonia (NH ₃ ) as a reaction medium. Then, the temperature of the object to be heated is raised to a temperature suitable for exhaust gas purification, and when the temperature of the internal combustion engine rises sufficiently and the temperature of the exhaust gas rises, the chemical heat storage applied to the exhaust purification system that recovers the reaction medium The device is known. The chemical heat storage device disclosed in Patent Document 1, the adsorber activated carbon as an adsorbent for physical adsorption of NH ₃ is accommodated, is connected to the adsorber, NH ₃ and by a chemical reaction to generate heat reaction And a reactor filled with the material.

The adsorber in the chemical heat storage device described in Patent Document 1 has a rectangular container formed of a rectangular flat plate, and activated carbon is accommodated therein. Inside the adsorber, NH ₃ is stored by physical adsorption with activated carbon.

JP 2013-242053 A

By the way, generally, a large pressure of, for example, 1 MPa at the maximum may be generated by storing NH ₃ inside the adsorber in the chemical heat storage device. Since the adsorber of the conventional chemical heat storage device is constituted by a rectangular flat plate, when such a large pressure is generated inside the adsorber, the pressure is applied to the surface of the flat plate constituting the adsorber. May be bent. Therefore, in order to prevent the flat plate from bending, it is necessary to configure the adsorber with a flat plate having a thickness that can withstand the pressure of NH ₃ .

  However, if the adsorber is formed of a thick flat plate, there is a problem that the adsorbent inside the adsorber moves away from the outside air outside the adsorber, and the efficiency of heat exchange between the adsorbent and the outside air deteriorates.

  An object of this invention is to provide the chemical heat storage apparatus which can raise the efficiency of heat exchange with adsorption material and external air.

  A chemical heat storage device according to the present invention includes a reactor having a reaction material that chemically reacts with a reaction medium to generate heat, and an adsorber having an adsorbent that is connected to the reactor and adsorbs the reaction medium. The adsorber is provided with a plurality of cooling plates arranged in parallel so as to face each other, and a plurality of cylinders that extend along the direction in which the cooling plates are arranged and penetrate the plurality of cooling plates and accommodate the adsorbing material. And an adsorbent containing pipe in the form of a tube.

  In the chemical heat storage device according to the present invention, the reaction medium is stored in the adsorber by adsorbing the reaction medium to the adsorbent accommodated in the cylindrical adsorbent accommodating pipe. By the way, pressure is generated by storing the reaction medium inside the adsorber. When the adsorber is composed of a flat plate, if the flat plate is made thick enough to withstand the pressure of the reaction medium, the adsorbent inside the adsorber moves away from the outside air outside the adsorber, and the adsorbent and outside air The efficiency of heat exchange between the two becomes worse. On the other hand, in the chemical heat storage device according to the present invention, since the adsorbent in the adsorber is accommodated inside the cylindrical adsorbent accommodating pipe, the adsorbent accommodating pipe that can withstand the pressure of the reaction medium. The thickness can be made thinner than the thickness of a flat plate that can withstand the same pressure. Thereby, compared with the case where an adsorber is comprised with the flat plate, an adsorbent can be brought close to external air and heat exchange with an adsorbent and external air can be performed efficiently. Further, in the chemical heat storage device according to the present invention, the cylindrical adsorbent accommodating pipe is provided so as to extend along the parallel arrangement direction of the cooling plates and to penetrate the plurality of cooling plates. For this reason, heat exchange between the adsorbent inside the cylindrical adsorbent accommodating pipe and the outside air outside the adsorbent accommodating pipe can be performed more efficiently via the cooling plate. As described above, the efficiency of heat exchange between the adsorbent and the outside air can be increased.

  In the chemical heat storage device according to the present invention, a reaction medium flow path for circulating the reaction medium is arranged at the center in the adsorbent accommodating pipe, and the adsorbent is a reaction in the adsorbent accommodating pipe. It may be accommodated between the medium flow path and the adsorbent accommodating pipe. In this case, the reaction medium flows through the reaction medium flow path disposed in the central portion inside the adsorbent accommodating pipe, so that the time until the reaction medium reaches the entire inside of the adsorbent accommodating pipe can be shortened. The adsorbent can adsorb the reaction medium suitably.

  In the chemical heat storage device according to the present invention, the reaction medium flow path may be formed of a porous body. In this case, the adsorbent can be pressed from the center side toward the outside inside the adsorbent accommodating pipe by the porous body, and the adhesion between the adsorbent and the adsorbent accommodating pipe can be enhanced. Thereby, it is possible to further increase the efficiency of heat exchange between the adsorbent and the outside air.

  In the chemical heat storage device according to the present invention, the adsorber may further include a heater that extends along the parallel arrangement direction of the cooling plates and that penetrates the plurality of cooling plates. When heat is generated from the reaction material in the reactor, the reaction medium is desorbed from the adsorbent in the adsorber and supplied to the reaction material. At this time, by providing a heater in the adsorber, the heat required when the reaction medium is desorbed from the adsorbent can be supplemented with the heat from the heater. As a result, the rate at which the reaction medium is desorbed can be increased, and the amount by which the reaction medium is desorbed can be increased.

  In the chemical heat storage device according to the present invention, the plurality of cylindrical adsorbent accommodating pipes may be arranged so as to be aligned along the edge of the cooling plate in the plurality of cooling plates. In this case, the adsorbent accommodating pipe can efficiently exchange heat with the outside air via the cooling plate.

  In the chemical heat storage device according to the present invention, the heater may be arranged so as to be surrounded by a plurality of adsorbent accommodation pipes. In this case, heat from the heater can be suitably transmitted to the adsorbent housing pipe surrounding the heater. As a result, the rate at which the reaction medium is desorbed can be further increased, and the amount by which the reaction medium is desorbed can be further increased.

  ADVANTAGE OF THE INVENTION According to this invention, the chemical heat storage apparatus which can improve the efficiency of heat exchange with adsorption material and external air can be provided.

It is a schematic block diagram which shows the exhaust gas purification system provided with the chemical heat storage apparatus which concerns on 1st Embodiment of this invention. It is a perspective view which shows the adsorption device shown in FIG. It is a perspective view which shows the principal part of the adsorption device shown in FIG. It is a horizontal direction sectional view of the adsorption machine shown in FIG. It is a vertical direction expanded sectional view of the adsorbent accommodation pipe shown in FIG. It is a perspective view which shows the principal part of the adsorption machine with which the chemical heat storage apparatus which concerns on 2nd Embodiment is provided, and is a figure corresponding to FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description, the same reference numerals are used for the same elements or elements having the same function, and redundant description is omitted.

(First embodiment)
FIG. 1 is a schematic configuration diagram showing an exhaust purification system including a chemical heat storage device according to the first embodiment of the present invention. In FIG. 1, an exhaust purification system 1 is provided in an exhaust system of a diesel engine 2 (hereinafter simply referred to as an engine 2) of a vehicle, and contains harmful substances (environment) contained in exhaust gas that is a heat medium exhausted from the engine 2. It is a system that purifies (pollutants).

  The exhaust purification system 1 includes a heat exchanger 4, an oxidation catalyst (DOC: Diesel Oxidation Catalyst) 5, which are arranged in order from an upstream side to a downstream side in an exhaust pipe 3 that is an exhaust passage connected to an engine 2. A diesel exhaust particulate filter (DPF) 6, a selective catalytic reduction (SCR) 7, and an oxidation catalyst (ASC: Ammonia Slip Catalyst) 8 are provided.

The heat exchanger 4 is a device that transfers heat between the exhaust gas from the engine 2 and a reactor 11 described later, and has a honeycomb structure. The heat exchanger 4 is not limited to the honeycomb structure, and a known heat exchange structure can be used. The oxidation catalyst 5 is a catalyst that oxidizes and purifies HC, CO, and the like contained in the exhaust gas. The DPF 6 is a filter that collects and removes particulate matter (PM) contained in the exhaust gas. The SCR 7 is a catalyst that reduces and purifies NOx contained in the exhaust gas with urea or ammonia (NH ₃ ). The oxidation catalyst 8 is a catalyst that oxidizes NH ₃ that has passed through the SCR 7 and has flowed downstream of the SCR 7.

  Further, the exhaust purification system 1 includes a chemical heat storage device 10. The chemical heat storage device 10 is a device that normally stores heat (exhaust heat) of exhaust gas and heats the heat exchanger 4 without energy by using exhaust heat when necessary. The chemical heat storage device 10 includes a reactor 11 disposed around the heat exchanger 4 and an adsorber 12 connected to the reactor 11.

The reactor 11 includes a reaction material 13 that chemically reacts with NH ₃ that is a gaseous reaction medium to generate heat and receives exhaust heat to desorb NH ₃ . As the reaction material 13, a material having a composition MXa of a halide is used. Here, M is an alkaline earth metal such as Mg, Ca, or Sr, or a transition metal such as Cr, Mn, Fe, Co, Ni, Cu, or Zn. X is Cl, Br, I or the like. a is 2-3. The reactor 11 may include a high thermal conductor such as stainless steel, metal beads, SiC beads, Si beads, carbon beads, and alumina beads.

The adsorber 12 contains an adsorbent 14 that can be held and desorbed by physical adsorption of NH ₃ . As the adsorbent 14, activated carbon, carbon black, mesoporous carbon, nanocarbon, zeolite, or the like is used. Adsorber 12, by physically adsorbed NH ₃ to the adsorbent 14, storing NH _3. The adsorbent 14 may be in the form of a powder or a molded body.

  The reactor 11 and the adsorber 12 are connected via an introduction pipe 15. The introduction pipe 15 is provided with an electromagnetic valve 16 that is an on-off valve that opens and closes a flow path between the reactor 11 and the adsorber 12. The solenoid valve 16 is controlled by a controller (not shown).

In such a chemical heat storage device 10, when the temperature of the exhaust gas from the engine 2 is low, NH ₃ is supplied from the adsorber 12 to the reactor 11 through the introduction pipe 15 by opening the electromagnetic valve 16. The reaction material 13 (for example, MgBr ₂ ) in the reactor 11 and NH ₃ chemically react and chemisorb (coordinate bond), and heat is generated from the reaction material 13. That is, a reaction from the left side to the right side (exothermic reaction) in the following reaction formula (A) occurs. The heat exchanger 4 is heated by the heat generated in the reactor 11 and the exhaust gas is heated via the heat exchanger 4.
MgBr ₂ + xNH ₃ ＭｇMg (NH ₃ ) xBr ₂ + heat (A)

On the other hand, when the temperature of the exhaust gas from the engine 2 increases, exhaust heat is given to the reaction material 13 of the reactor 11 so that the reaction material 13 and NH ₃ are separated. That is, a reaction (regeneration reaction) from the right side to the left side in the above reaction formula (A) occurs. Then, NH ₃ desorbed from the reaction material 13 returns to the adsorber 12 through the introduction pipe 15 and is physically adsorbed (recovered) by the adsorbent 14 of the adsorber 12.

  Then, with reference to FIGS. 2-5, the structure of the adsorber 12 with which the chemical thermal storage apparatus 10 which concerns on this embodiment is provided is demonstrated in detail. FIG. 2 is a perspective view showing the adsorber 12 shown in FIG. FIG. 3 is a perspective view showing a main part of the adsorber 12 shown in FIG. 4 is a horizontal cross-sectional view of the adsorber 12 shown in FIG.

  As shown in FIGS. 2 to 4, the adsorber 12 extends along the parallel arrangement direction of the cooling plates 21 and the cooling plates 21 arranged in parallel so as to face each other, and penetrates the cooling plates 21. And a plurality of cylindrical adsorbent accommodating pipes 23 and header portions 25 provided on one end side and the other end side of each adsorbent accommodating pipe 23. In FIG. 3, the adsorber 12 with the header portion 25 removed is shown.

  The cooling plate 21 is a substantially rectangular plate made of, for example, an aluminum material. The cooling plate 21 has a plurality of through holes 21a through which the adsorbent accommodating pipes 23 are inserted. The through-holes 21 a are formed so as to be lined up and down in two stages in a direction perpendicular to the longitudinal direction of the cooling plate 21 and to be arranged in a plurality of rows (here, seven rows) in the longitudinal direction of the cooling plate 21. The plurality of cooling plates 21 are arranged side by side so that the positions of the through holes 21a substantially coincide. The respective adsorbent accommodation pipes 23 are inserted into the respective through holes 21a of the plurality of cooling plates 21 arranged in parallel. The plurality of cooling plates 21 are spaced apart so that the opposing surfaces do not contact each other.

  The plurality of cylindrical adsorbent accommodating pipes 23 are arranged along the edge of the cooling plate 21 in each cooling plate 21. For example, each cooling plate 21 is arranged in two upper and lower stages in a direction orthogonal to the longitudinal direction of the cooling plate 21. The adsorbent accommodating pipe 23 is made of stainless steel, for example. The adsorbent accommodating pipes 23 are inserted through the respective through holes 21 a so as to penetrate all the cooling plates 21, and extend along the direction in which the cooling plates 21 are arranged side by side. In a state where the adsorbent accommodating pipe 23 is inserted through the through hole 21 a, the outer peripheral surface 23 a of the adsorbent accommodating pipe 23 is in contact with the cooling plate 21.

  The adsorbent accommodating pipe 23 exchanges heat with the cooling plate 21 when the outer peripheral surface 23 a contacts the cooling plate 21. The cooling plate 21 exchanges heat with the outside air by contacting the outside air outside the adsorbent housing pipe 23. Thereby, the adsorbent accommodating pipe 23 performs heat exchange with the outside air via the cooling plate 21.

Here, the adsorbent accommodating pipe 23 will be described in more detail with reference to FIG. FIG. 5 is an enlarged vertical sectional view of the adsorbent accommodating pipe 23 shown in FIG. As shown in FIG. 5, the adsorbent accommodating pipe 23 has an outer peripheral surface 23a and an inner peripheral surface 23b. The adsorbent 14 is accommodated inside the adsorbent accommodating pipe 23. In the present embodiment, a porous body 27 is disposed in the central portion inside the adsorbent accommodating pipe 23. The porous body 27 is, for example, a metal porous body such as metal wool having many pores. The porous body 27, the NH ₃ serves as NH ₃ flow path circulating (the reaction medium flow path). Further, the porous body 27 presses the adsorbent 14 against the inner peripheral surface 23b of the adsorbent accommodating pipe 23 from the center side toward the outside inside the adsorbent accommodating pipe 23, and the adsorbent 14 and the adsorbent accommodating pipe 23 are separated. Has a function to improve adhesion.

Referring to FIG. 2 again, the header portion 25 is made of, for example, stainless steel and has a cylindrical shape. The header portion 25 is connected to one end side and the other end side of the adsorbent accommodating pipe 23 and communicated with the adsorbent accommodating pipe 23. Of each header portion 25, the header portion 25 connected to one end side of the adsorbent accommodating pipe 23 is connected to the introduction pipe 15. NH ₃ held by the adsorbent 14 in the adsorbent accommodating pipe 23 flows from the header portion 25 to the introduction pipe 15 and is supplied to the reactor 11. Further, NH ₃ desorbed from the reaction material 13 flows from the introduction pipe 15 to the header portion 25, returns to the adsorber 12, and is physically adsorbed (recovered) by the adsorbent 14 of the adsorber 12 (see FIG. 4). . In FIG. 4, the porous body 27 is omitted.

As described above, in the chemical heat storage device 10 according to the present embodiment, NH ₃ is physically adsorbed on the adsorbent 14 accommodated in the cylindrical adsorbent accommodating pipe 23, whereby NH ₃ is introduced into the adsorbent accommodating pipe 23. ₃ is stored. By the way, normally, a maximum pressure of, for example, 1 MPa is generated by storing NH ₃ inside the adsorber. Conventionally, since the adsorber is composed of a flat plate, if the flat plate is made thick enough to withstand the pressure of NH ₃ , the adsorbent inside the adsorber moves away from the outside air outside the adsorber, and the adsorbent and the outside air There has been a problem that the efficiency of heat exchange with the device becomes worse. On the other hand, in the chemical heat storage device 10 according to the present embodiment, the adsorbent 14 in the adsorber 12 is accommodated inside the cylindrical adsorbent accommodating pipe 23, so that it can withstand the pressure due to NH _3. The thickness of the adsorbent accommodating pipe 23 can be made thinner than the thickness of a flat plate that can withstand the same pressure in a conventional adsorber. Thereby, the adsorbent 14 can be brought closer to the outside air than the conventional adsorber, and heat exchange between the adsorbent 14 and the outside air can be performed efficiently. Further, in the chemical heat storage device 10 according to the present embodiment, the cylindrical adsorbent accommodating pipe 23 is provided so as to extend along the parallel arrangement direction of the cooling plates 21 and to penetrate the plurality of cooling plates 21. . That is, the outer peripheral surface 23 a of the adsorbent accommodating pipe 23 is in contact with each cooling plate 21. For this reason, heat exchange between the adsorbent 14 inside the cylindrical adsorbent accommodating pipe 23 and the outside air outside the adsorbent accommodating pipe 23 can be performed more efficiently via the cooling plate 21. As described above, the efficiency of heat exchange between the adsorbent 14 and the outside air can be increased.

In addition, a porous body 27 that is an NH ₃ flow path is disposed in a central portion inside the adsorbent accommodating pipe 23. For this reason, when the adsorbent 14 is composed of a powder or a plurality of molded bodies, the adsorbent 14 can be pressed from the center side toward the outside in the adsorbent accommodating pipe 23 by the porous body 27. Adhesion between the adsorbent 14 and the adsorbent accommodating pipe 23 can be enhanced. As a result, the efficiency of heat exchange between the adsorbent 14 and the outside air can be further increased. Furthermore, when NH ₃ circulates through the porous body 27, it is possible to reduce the time until the NH ₃ reaches the entire inside of the adsorbent accommodating pipe 23, and the adsorbent 14 is preferably physically adsorbed with NH ₃ . be able to.

  Further, the adsorbent accommodating pipes 23 are arranged along the edges of the cooling plates 21 in the respective cooling plates 21. For this reason, the adsorbent accommodating pipe 23 can efficiently exchange heat with the outside air via the cooling plate 21.

(Second Embodiment)
Next, the structure of the chemical heat storage apparatus which concerns on 2nd Embodiment is demonstrated. Similar to the chemical heat storage device 10 according to the first embodiment, the chemical heat storage device according to the second embodiment includes a reactor, an adsorber, and an introduction pipe. The chemical heat storage device according to the second embodiment is different from the chemical heat storage device 10 according to the first embodiment in that the adsorber has an electric heater.

  FIG. 6 is a perspective view illustrating a main part of an adsorber provided in the chemical heat storage device according to the second embodiment, and corresponds to FIG. 3. As shown in FIG. 6, the adsorber 12 </ b> B included in the chemical heat storage device according to the second embodiment includes an electric heater 30 attached to the cooling plate 21.

  The electric heater 30 is a cylindrical heater that performs heating using electricity. The electric heater 30 is provided so as to extend along the parallel arrangement direction of the cooling plates 21 and to penetrate the plurality of cooling plates 21. In the present embodiment, the plurality of cylindrical adsorbent accommodating pipes 23 are arranged in two upper and lower stages on each cooling plate 21 as in the first embodiment.

  The electric heater 30 is disposed so as to be surrounded by the plurality of adsorbent accommodating pipes 23. That is, each cooling plate 21 is disposed between the upper adsorbent accommodating pipe 23 and the lower adsorbent accommodating pipe 23. More specifically, the electric heater 30 is disposed so as to be surrounded by two adjacent rows of upper and lower adsorbent accommodating pipes 23 when viewed from the side-by-side direction of the cooling plates 21.

The electric heater 30 has a function of supplementing the amount of heat required when NH ₃ is desorbed from the adsorbent 14 in the adsorber 12B during the exothermic reaction of the chemical heat storage device. The electric heater 30 raises the temperature of the adsorber 12B by the heat and raises the pressure inside the adsorber 12B. Thereby, the exothermic temperature of the reaction material 13 at the time of the exothermic reaction of a chemical thermal storage apparatus rises. That is, the electric heater 30 has a function of assisting the heating of the heat exchanger 4 by the heat generated in the reactor 11 during the exothermic reaction of the chemical heat storage device.

As described above, even in the chemical heat storage device according to the present embodiment, since the adsorbent 14 in the adsorber 12B is accommodated inside the cylindrical adsorbent accommodating pipe 23, the adsorbent accommodating that can withstand the pressure of NH ₃ is accommodated. The thickness of the pipe 23 can be made thinner than the thickness of a flat plate that can withstand the same pressure in a conventional adsorber. Thereby, the adsorbent 14 can be brought closer to the outside air than the conventional adsorber, and heat exchange between the adsorbent 14 and the outside air can be performed efficiently. In addition, heat exchange between the adsorbent 14 inside the cylindrical adsorbent accommodating pipe 23 and the outside air outside the adsorbent accommodating pipe 23 can be performed more efficiently via the cooling plate 21. As described above, the efficiency of heat exchange between the adsorbent 14 and the outside air can be increased.

Furthermore, according to the chemical heat storage device according to the present embodiment, since the adsorber 12B has the electric heater 30, the heat required when the NH ₃ is desorbed from the adsorbent 14 can be supplemented with the heat from the electric heater 30. As a result, the speed at which NH ₃ is desorbed can be increased, and the amount of NH ₃ desorbed can be increased. Moreover, the temperature of the adsorber 12B can be raised by the heat of the electric heater 30 and the pressure inside the adsorber 12B can be raised. As a result, the exothermic temperature of the reaction material 13 during the exothermic reaction of the chemical heat storage device is increased. Can be made. That is, the electric heater 30 can assist the heating of the heat exchanger 4 by the heat generated in the reactor 11 during the exothermic reaction of the chemical heat storage device.

Further, in the chemical heat storage device according to the present embodiment, the electric heater 30 is disposed so as to be surrounded by the plurality of adsorbent accommodation pipes 23. Thereby, the heat by the electric heater 30 can be suitably transmitted to the adsorbent accommodating pipe surrounding the electric heater 30. As a result, increase the rate at which NH ₃ is desorbed, it is possible to increase the amount of NH ₃ is desorbed, the exothermic temperature of the reaction member 13 can be increased.

  As mentioned above, although various embodiment of this invention was described, this invention is not limited to the said embodiment, It deform | transformed in the range which does not change the summary described in each claim, or applied to others It may be a thing.

In the embodiment described above, the porous body 27 is provided as the NH ₃ flow path in the central portion of the adsorbent accommodating pipe 23, but the present invention is not limited to this. For example, the adsorbent 14 may be formed of a molded body having a cavity at the center in the adsorbent accommodating pipe 23, and the cavity may be an NH ₃ flow path. Further, the NH ₃ flow path does not have to be provided in the central portion inside the adsorbent accommodating pipe 23.

  In the above-described embodiment, the plurality of cylindrical adsorbent accommodating pipes 23 are arranged in two upper and lower stages in each cooling plate 21 in a direction perpendicular to the longitudinal direction of the cooling plate 21. For example, each cooling plate 21 may be arranged so as to be arranged in at least one stage in a direction orthogonal to the longitudinal direction of the cooling plate 21 or may be arranged in a circular shape. When arranged in a circle, if the electric heater is arranged in a circle, heat from the electric heater can be suitably transmitted to the adsorbent accommodating pipe 23.

  In the said embodiment, although each header part 25 was provided in the one end side and other end side of the adsorption material accommodation pipe 23, it is not restricted to this, Each header part 25 does not need to be provided. For example, the introduction pipe 15 may be branched and directly connected to each adsorbent accommodating pipe 23 without providing the header portion 25 on one end side of the adsorbent accommodating pipe 23. Moreover, you may seal the opening in the other end side of each adsorption material accommodation pipe 23, without providing the header part 25 in the other end side of the adsorption material accommodation pipe 23, respectively. In addition, you may seal the opening in the other end side of each adsorbent accommodation pipe 23 by connecting the other end sides of each adsorbent accommodation pipe 23 by welding.

The reaction medium introduced into the reactor 11 is not limited to NH ₃ , and may be CO ₂ , for example. In this case, as the reaction material to CO ₂ and the chemical _{reaction, MgO, CaO, BaО, Ca} (OH) 2, Mg (OH) 2, Fe (OH) 2, Fe (OH) 3, FeO, Fe 2 O ₃ , Fe ₃ O ₄ or the like can be used.

  The method of adsorbing a reaction medium such as NH3 on the adsorbent 14 is not limited to physical adsorption, and may be chemical adsorption or the like.

  Although the reactor 11 is arranged around the exhaust pipe 3 at the position where the heat exchanger 4 is arranged, the present invention is not limited to this. For example, you may arrange | position around the exhaust pipe 3 in the position where the oxidation catalyst 5 is arrange | positioned. In this case, the oxidation catalyst 5 becomes a heating object provided in the exhaust pipe 3 corresponding to the portion where the reactor 11 is disposed. That is, the reactor 11 is not limited to the one that heats the heat exchanger 4, and can also be applied to one that heats other parts provided in the exhaust system of the engine 2 such as the oxidation catalyst 5 of the exhaust pipe 3. is there. Moreover, the reactor 11 may be arrange | positioned inside a heating target object. Moreover, the reactor 11 is applicable also to what heats the part in the exhaust pipe 3 in which the heating target object does not exist.

  DESCRIPTION OF SYMBOLS 10 ... Chemical thermal storage apparatus, 11 ... Reactor, 12 ... Adsorber, 13 ... Reactant, 14 ... Adsorbent, 21 ... Cooling plate, 23 ... Adsorbent accommodation pipe, 27 ... Porous body (reaction medium flow path), 30 ... Electric heater (heater).

Claims (6)

A reactor having a reactant that chemically reacts with the reaction medium to generate heat;
An adsorber connected to the reactor and having an adsorbent for adsorbing the reaction medium;
With
The adsorber is provided with a plurality of cooling plates arranged in parallel so as to face each other, and extending along the direction in which the cooling plates are arranged, and penetrating the plurality of cooling plates, and accommodates the adsorbent And a plurality of cylindrical adsorbent accommodating pipes. A reaction medium flow path for circulating the reaction medium is disposed in a central portion inside the adsorbent containing pipe,
The adsorbent is accommodated between the reaction medium flow path and the adsorbent accommodating pipe inside the adsorbent accommodating pipe.
The chemical heat storage device according to claim 1. The reaction medium flow path is formed of a porous body.
The chemical heat storage device according to claim 2. The adsorber further includes a heater that extends along the direction in which the cooling plates are arranged and penetrates the plurality of cooling plates.
The chemical heat storage device according to any one of claims 1 to 3. The plurality of cylindrical adsorbent accommodating pipes are arranged so as to be aligned along the edge of the cooling plate in the plurality of cooling plates.
The chemical heat storage device according to any one of claims 1 to 4. The heater is disposed so as to be surrounded by the plurality of adsorbent accommodating pipes.
The chemical heat storage device according to claim 4.

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