JP7269583B2 - Steam generator and steam generation system - Google Patents

Description

TECHNICAL FIELD The present invention relates to a steam generator equipped with a chemical heat pump and a steam generation system.

As disclosed in Patent Document 1, a chemical heat pump is known as a device that can be used to reuse waste heat generated in factories and the like. A heat pipe may be used for heat transport of such a chemical heat pump or heat transport of a heat storage device disclosed in Patent Documents 2 and 3.

Japanese Utility Model Laid-Open No. 61-149048 JP-A-2000-171179 JP 2017-219233 A

In the chemical heat pump, steam can also be generated using the heat obtained from the heat dissipation operation. In this way, when exhaust heat is used to generate steam with a chemical heat pump, increasing the efficiency of heat utilization in the chemical heat pump can be achieved by, for example, using exhaust heat more efficiently or producing steam at a higher temperature. It is important from the viewpoint of causing it to occur.

SUMMARY OF THE INVENTION An object of the present invention is to provide a steam generator and a steam generation system that are capable of enhancing the efficiency of heat utilization in the heat storage operation and heat release operation of a chemical heat pump.

A steam generator for solving the above problems comprises a chemical heat pump for generating steam, a steam supply section for supplying the steam to a supply destination, a steam transfer pipe section for sending the steam from the chemical heat pump to the steam supply section, The chemical heat pump includes an exhaust heat recovery unit for recovering exhaust heat, a reactor containing a chemical heat storage material that stores heat by dehydration reaction and releases heat by hydration reaction, and a heat transport path for transporting heat from an exhaust heat recovery unit to the reactor, wherein the heat transport path includes a first heat pipe unit arranged in the exhaust heat recovery unit and a heat pipe unit arranged in the reactor. and an intermediate heat pipe portion that transfers heat between the first heat pipe portion and the second heat pipe portion, wherein the vapor transfer pipe portion performs heat dissipation operation of the chemical heat pump. At times, steam generated inside the second heat pipe section is sent to the steam supply section.

According to this configuration, during the heat storage operation of the chemical heat pump, the exhaust heat recovered by the exhaust heat recovery section can be heat-transported to the reactor 23 by the first heat pipe section, the intermediate heat pipe section, and the second heat pipe section. can. Further, during the heat dissipation operation of the chemical heat pump, the steam generated in the second heat pipe can be transferred to the steam discharge part by the steam transfer pipe. That is, in the reactor, the second heat pipe portion that transports heat during the heat storage operation is used as a steam generating portion that generates steam during the heat dissipation operation. In this way, heat transfer to and from the reactor during the operation of the chemical heat pump is performed by the common second heat pipe portion, so that unnecessary heat release from the reactor to the outside can be suppressed.

In the above steam generator, the chemical heat pump includes a storage tank for storing condensed water condensed inside the second heat pipe section during heat storage operation, and a storage tank for storing condensed water condensed inside the second heat pipe section during heat storage operation, and the second heat pipe section from the storage tank during heat radiation operation of the chemical heat pump. It is preferable to further include a water feeding unit that feeds water to.

According to this configuration, since the cleanliness of the condensed water is relatively high, it is possible to easily improve the cleanliness of the water stored in the storage tank. The water containing the condensed water is sent to the second heat pipe section and steam is generated in the second heat pipe section, so that the water can be reused and the relatively clean steam is supplied to the steam supply section. can be supplied to

In the above steam generator, the steam supply section preferably includes a detector for detecting the pressure of the steam sent from the steam transfer pipe section, and a control valve for controlling the supply of the steam to the supply destination. .

According to this configuration, for example, by opening the control valve when the detected value of the detector reaches a predetermined pressure, it is possible to supply steam at an appropriate pressure to the supply destination. Further, when the pressure of the steam sent to the steam supply unit is insufficient, by closing the control valve, it is possible to prevent the steam from flowing back from the supply destination to the steam supply unit.

In the above steam generator, it is preferable that the steam used for the hydration reaction in the reactor is introduced from an ejector during the heat dissipation operation of the chemical heat pump.
According to this configuration, steam can be compressed without using a compressor that operates on external power, and the steam can be used to accelerate the hydration reaction of the chemical heat storage material.

In the above steam generator, it is preferable that the heat transport path is connected so that the steam generated inside the first heat pipe portion is sucked into the ejector.
According to this configuration, steam is generated for causing a hydration reaction with the chemical heat storage material in the reactor during the heat radiation operation of the chemical heat pump, and steam for heating the chemical heat storage material within the reactor during the heat storage operation of the chemical heat pump. can be performed in a common waste heat recovery unit.

A steam generation system for solving the above problems includes the above steam generator, an introduction path for introducing steam for advancing the hydration reaction of the chemical heat storage material into the reactor, and steam generated by the dehydration reaction of the chemical heat storage material. and a recovery path for recovering from within the reactor.

ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to obtain steam by efficiently using the heat obtained by the heat radiation operation of a chemical heat pump.

It is a schematic diagram showing a steam generator in an embodiment. It is a schematic diagram showing a state in which the chemical heat pump is in heat storage operation. FIG. 3 is a schematic diagram showing a state in which a chemical heat pump is operating to radiate heat;

Hereinafter, embodiments of a steam generator will be described with reference to the drawings.
As shown in FIG. 1, a steam generator 12 forming part of a steam generation system 11 includes a chemical heat pump 21 that generates steam and a steam supply section 31 that supplies steam to a destination. The steam generator 12 includes a steam transfer pipe section 41 for sending steam from the chemical heat pump 21 to the steam supply section 31 .

The chemical heat pump 21 includes an exhaust heat recovery unit 22 that recovers exhaust heat, a reactor 23 that accommodates the chemical heat storage material HM, and a heat transport path 24 that transports heat from the exhaust heat recovery unit 22 to the reactor 23. I have.

The exhaust heat recovery unit 22 includes a heat exchanger into which exhaust heat from the outside is introduced. The form of the exhaust heat introduced into the exhaust heat recovery unit 22 may be liquid (such as waste water) or gas.
The chemical heat storage material HM accommodated in the reactor 23 is a material that undergoes a dehydration reaction during the heat storage operation of the chemical heat pump 21 and a hydration reaction during the heat dissipation operation of the chemical heat pump 21 . The reactor 23 is configured such that steam used for the hydration reaction of the chemical heat storage material HM is introduced. Further, the reactor 23 is configured to discharge steam generated by the dehydration reaction of the chemical heat storage material HM.

A well-known solid material can be used as the chemical heat storage material HM. The chemical heat storage material HM may be composed of only a chemical heat storage material, or may be a material obtained by binding a particulate chemical heat storage material with a water vapor permeable binder such as a water vapor permeable resin. Chemical heat storage substances include, for example, calcium chloride and calcium sulfate. One type of chemical heat storage material HM may be used, or a plurality of types may be used in combination. The chemical heat storage material HM preferably has heat resistance of 200° C. or more.

The heat transport path 24 includes a first heat pipe portion 24a arranged inside the exhaust heat recovery section 22, a second heat pipe portion 24b arranged inside the reactor 23, the first heat pipe portion 24a and the second heat pipe portion 24b. and an intermediate heat pipe portion 24c that transfers heat to and from the pipe portion 24b.

Inside the first heat pipe portion 24a, a wick is arranged to feed the working fluid (water) to the intermediate heat pipe portion 24c side by using capillary action. As is well known, the wick is a porous body having a capillary structure and plays a role of sending working fluid in one direction in the heat transport path 24 . In the exhaust heat recovery section 22, heat is exchanged between the exhaust heat and the first heat pipe section 24a. The exhaust heat recovery unit 22 preferably has a pipe through which exhaust heat fluid flows, and more preferably, the pipe and the first heat pipe unit 24a are connected to a heat transfer plate. Thereby, heat exchange between exhaust heat and the first heat pipe portion 24a can be efficiently performed.

The second heat pipe portion 24b is preferably connected to a plurality of heat transfer plates within the reactor 23. As shown in FIG. Thereby, heat exchange between the second heat pipe portion 24b and the chemical heat storage material HM can be efficiently performed. In the reactor 23, in order to maintain the shape of the chemical heat storage material HM, it is preferable to cover the chemical heat storage material HM, the second heat pipe portion 24b, and the heat transfer plate with a support material having a mesh structure.

The steam supply part 31 is a part connected to the steam header SH as a supply destination. The steam supply section 31 includes a detector P1 that detects the pressure of steam sent from the steam transfer pipe section 41, and a control valve 32 that controls the supply of steam to the supply destination. The control unit that controls the control valve 32 opens and closes the control valve 32 based on, for example, the pressure threshold detected by the detector P1.

The control unit opens and closes the control valve 32 based on the comparison result between the pressure detected by the detector P1 and the pressure in the steam header SH to which it is supplied (the pressure detected by the detector P2). may be For example, when the pressure of steam in the steam supply unit 31 becomes higher than the pressure of steam in the steam header SH, the control unit may be configured to control the start of supply by opening the control valve 32 . can. Further, for example, when the pressure of the steam in the steam supply unit 31 becomes lower than the pressure of the steam in the steam header SH, the control unit is configured to control the supply stop by closing the control valve 32. be able to.

The steam transfer pipe portion 41 sends the steam generated inside the second heat pipe portion 24b to the steam supply portion 31 when the chemical heat pump 21 operates to radiate heat. That is, the vapor transfer pipe portion 41 is connected to the intermediate heat pipe portion 24 c of the chemical heat pump 21 .

The chemical heat pump 21 has a storage tank 25 that stores condensed water condensed inside the second heat pipe portion 24b during the heat storage operation, and a water supply that sends water from the storage tank 25 to the second heat pipe portion 24b during the heat radiation operation of the chemical heat pump 21. a portion 26; The water sending unit 26 includes a liquid sending pump 26a that sends the water in the storage tank 25 to the second heat pipe part 24b, and a circulation pump that makes it possible to circulate water between the second heat pipe part 24b and the storage tank 25. It further comprises a channel 26b. The storage tank 25 is configured to be replenishable with water from the outside.

Next, the steam generation system 11 will be described.
The steam generation system 11 includes an introduction path L1 that introduces steam that advances the hydration reaction of the chemical heat storage material HM into the reactor 23, and a recovery path that recovers steam generated by the dehydration reaction of the chemical heat storage material HM from the reactor 23. route L2. The introduction path L1 includes an ejector EJ and a boiler B. The recovery path L2 includes a steam recovery section SR.

The steam sucked into the ejector EJ may be generated, for example, by separately providing an evaporator that utilizes exhaust heat. It is preferable to generate it using the recovery unit 22 . That is, the heat transport path 24 of the steam generator 12 is preferably connected so that the steam generated inside the first heat pipe portion 24a is sucked into the ejector EJ. Part of the steam generated in the boiler B can be used as the driving steam for the ejector EJ. As the boiler B, a boiler that is already installed for another purpose in a facility such as a factory can be used. Note that the driving steam for the ejector EJ can also be supplied from an existing steam pipe.

The steam recovery unit SR recovers steam generated by the dehydration reaction of the chemical heat storage material HM in the reactor 23 during the heat storage operation of the chemical heat pump 21 . As the vapor recovery unit SR, for example, a vapor recovery device containing recovery materials or a decompression pump can be used. Here, a case where a steam recovery device is used as the steam recovery unit SR will be described as an example. As the recovery material, a material that can be hydrated with steam (water) generated by the dehydration reaction of the chemical heat storage material HM in the reactor 23 can be used. A heat exchanger into which a heat medium such as waste hot water or cold water flows from the outside is provided in the steam recovery device, and the recovery material is arranged in the steam recovery device so as to be heated or cooled by the heat exchanger. be done. Recovery of steam by the recovery material is facilitated by cooling the recovery material, for example, with cold water.

The hydration reaction of the recovery material in the steam recovery device can reduce the pressure in the steam recovery device. As a result, even if the steam generated from the chemical heat storage material HM in the reactor 23 has a relatively low pressure (low temperature), the recovery material capable of hydration reaction with the low-pressure steam is used to generate the chemical heat storage material HM. dehydration reaction can be favorably progressed.

A well-known solid material can be used as the collected material. The recovery material may be composed only of a recovery substance capable of hydration reaction and dehydration reaction, or may be a material in which a particulate recovery substance is bound with a water vapor permeable binder such as a water vapor permeable resin. good.

As the recovery material (substance for recovery), for example, a substance that undergoes a hydration reaction at a temperature higher than the temperature at which steam condenses under pressure conditions below atmospheric pressure can be suitably used. As a result, even if the operating condition of the chemical heat pump 21 is less than the atmospheric pressure (under reduced pressure) and cold water having a temperature higher than the temperature at which steam can be condensed is supplied to the heat exchanger of the steam recovery device, the steam can be recovered. It becomes possible to collect steam in the vessel. By setting the operating conditions (heat storage operation conditions) in the system of the chemical heat pump 21 to be less than the atmospheric pressure (under reduced pressure), it is possible to reduce the safety cost of the chemical heat pump 21 .

Here, the hydration reaction of the recovery material referred to in this specification also includes adsorption of steam (moisture) using a porous material as the recovery material. That is, the dehydration reaction of the recovery material includes desorption of steam (moisture) using the porous material as the recovery material. Examples of recovery materials include zeolite, lithium hydroxide, magnesium sulfate, strontium oxalate, activated carbon, and porous metal complexes (MOF). One type of collected material may be used, or a plurality of types may be used in combination. The collected material preferably has heat resistance of 200° C. or higher.

For example, by dehydrating the recovered material using the exhaust heat during the heat radiation operation of the chemical heat pump 21, the recovered material can be regenerated into a state capable of being hydrated and reused.
A control valve such as an on-off valve or a flow control valve is provided in a fluid flow path in the steam generation system 11 (steam generator 12). The heat storage operation and heat dissipation operation of the chemical heat pump 21 in the steam generation system 11 (steam generator 12) can be switched by opening and closing a control valve. Further, in the steam generation system 11 (steam generator 12), the opening degree of the flow control valve may be adjusted based on the detected value of a sensor that measures the temperature and pressure inside the pipes and containers.

Next, operations of the steam generator 12 and the steam generation system 11 will be described.
FIG. 2 shows a state in which the chemical heat pump 21 is performing a heat storage operation. Exhaust heat is used for the heat storage operation of the chemical heat pump 21 . The exhaust heat recovered by the exhaust heat recovery unit 22 is transported to the reactor 23 by the first heat pipe portion 24a, the intermediate heat pipe portion 24c, and the second heat pipe portion 24b, which are the heat transport path 24. FIG. Specifically, the working fluid (water) evaporated inside the first heat pipe section 24a in the exhaust heat recovery section 22 flows into the second heat pipe section 24b in the reactor 23 through the intermediate heat pipe section 24c. In the second heat pipe portion 24b, the working fluid condenses by exchanging heat with the chemical heat storage medium HM in the reactor 23. As shown in FIG. The working fluid condensed in the second heat pipe portion 24 b is stored in the storage tank 25 . The working fluid stored in the storage tank 25 is supplied into the first heat pipe portion 24a. Thus, the heat transport path 24 operates as a loop heat pipe in which the working fluid circulates in one direction.

Inside the reactor 23, the chemical heat storage material HM is heated by the heat transported to the reactor 23 (second heat pipe portion 24b). Thereby, a dehydration reaction of the chemical heat storage material HM is performed. The steam generated by the dehydration reaction of the chemical heat storage material HM is recovered by the steam recovery section SR.

FIG. 3 shows a state in which the chemical heat pump 21 is operating to radiate heat. Steam is generated inside the second heat pipe portion 24b in the reactor 23 by the heat generated during the heat radiation operation of the chemical heat pump 21, and this steam can be sent to the steam supply portion 31 through the steam transfer pipe portion 41. .

During the heat dissipation operation of the chemical heat pump 21 , steam is generated inside the first heat pipe portion 24 a of the exhaust heat recovery portion 22 . Specifically, steam can be generated by supplying water from the storage tank 25 to the first heat pipe portion 24a and heating the water with waste heat.

On the other hand, part of the steam generated in the boiler B is supplied to the ejector EJ as driving steam, and the ejector EJ is made to suck the steam generated inside the first heat pipe portion 24a. As a result, steam having a lower pressure than the steam generated in the boiler B and a higher pressure than the steam generated inside the first heat pipe portion 24a is discharged from the ejector EJ and introduced into the reactor 23. be. The steam introduced into the reactor 23 causes a hydration reaction of the chemical heat storage material HM inside the reactor 23 .

In the reactor 23, the heat generated by the hydration reaction of the chemical heat storage material HM heats the water in the second heat pipe portion 24b to generate steam in the second heat pipe portion 24b. The steam generated in the second heat pipe portion 24b is sent to the steam supply portion 31 through the steam transfer pipe portion 41. As shown in FIG. When the steam sent to the steam supply unit 31 reaches a predetermined pressure, the steam is supplied to the supply destination (steam header SH) by opening the control valve 32 .

Water can be supplied to the inside of the second heat pipe portion 24b using the storage tank 25 and the water supply portion 26 . More specifically, when supplying water into the second heat pipe portion 24b, the flow path from the second heat pipe portion 24b to the steam transfer pipe portion 41 is closed and the circulation path 26b of the water supply portion 26 is opened. Thereby, the water in the storage tank 25 can be sent by the liquid sending pump 26a. On the other hand, when the steam in the second heat pipe portion 24b is transferred to the steam supply portion 31, the circulation path 26b of the water supply portion 26 is closed, and the flow path from the second heat pipe portion 24b to the steam transfer pipe portion 41 is closed. open the Such channel switching operation can be easily performed by using, for example, a three-way valve.

The action and effect of this embodiment will be described.
(1) The steam generator 12 includes a chemical heat pump 21 , a steam supply section 31 and a steam transfer pipe section 41 . The chemical heat pump 21 includes an exhaust heat recovery section 22 , a reactor 23 and a heat transport path 24 . The heat transport path 24 includes a first heat pipe portion 24a arranged inside the exhaust heat recovery section 22, a second heat pipe portion 24b arranged inside the reactor 23, the first heat pipe portion 24a and the second heat pipe portion 24b. and an intermediate heat pipe portion 24c that transfers heat to and from the pipe portion 24b. The steam transfer pipe portion 41 sends the steam generated inside the second heat pipe portion 24b to the steam supply portion 31 when the chemical heat pump 21 operates to radiate heat.

According to this configuration, during the heat storage operation of the chemical heat pump 21, the exhaust heat recovered by the exhaust heat recovery unit 22 is transferred to the reactor 23 through the first heat pipe portion 24a, the intermediate heat pipe portion 24c, and the second heat pipe portion 24b. Can be heat transported. Further, during the heat radiation operation of the chemical heat pump 21, the vapor generated by the second heat pipe portion 24b can be transferred to the vapor discharge portion by the vapor transfer pipe portion 41. FIG. That is, in the reactor 23, the second heat pipe portion 24b that transports heat during the heat storage operation is used as a steam generator that generates steam during the heat dissipation operation. In this way, heat transfer to and from the reactor 23 during the operation of the chemical heat pump 21 is performed by the common second heat pipe portion 24b, so that unnecessary heat release from the reactor 23 to the outside can be suppressed. This makes it possible to improve the heat utilization efficiency.

(2) The chemical heat pump 21 further includes a storage tank 25 and a water supply section 26 . The storage tank 25 stores condensed water condensed inside the second heat pipe portion 24b during the heat storage operation. Since the cleanliness of the condensed water is relatively high, the cleanliness of the water stored in the storage tank 25 can be easily increased. Water containing this condensed water is sent to the second heat pipe portion 24b to generate steam in the second heat pipe portion 24b, so that relatively clean steam can be supplied to the steam supply portion 31. . Therefore, it is possible to reduce equipment troubles caused by cleanliness of water. Moreover, since the water used during the heat storage operation of the chemical heat pump 21 can be reused, it is also possible to reduce the amount of water used.

(3) The steam supply section 31 includes a detector P1 that detects the pressure of steam sent from the steam transfer pipe section 41, and a control valve 32 that controls the supply of steam to the supply destination. In this case, for example, by opening the control valve 32 when the detected value of the detector P1 reaches a predetermined pressure, it is possible to supply steam at an appropriate pressure to the supply destination. In addition, when the pressure of the steam sent to the steam supply unit 31 is insufficient, by closing the control valve 32 , it is possible to prevent the steam from flowing back from the supply destination to the steam supply unit 31 .

(4) Steam used for the hydration reaction of the chemical heat storage medium HM in the reactor 23 during the heat dissipation operation of the chemical heat pump 21 is introduced from the ejector EJ. In this case, steam can be compressed without using a compressor that operates on external power, and the steam can be used to accelerate the hydration reaction of the chemical heat storage medium HM. Therefore, it is possible to reduce the amount of external power used and efficiently generate steam.

(5) The heat transport path 24 is connected so as to suck the steam generated inside the first heat pipe portion 24a into the ejector EJ. In this case, steam is generated for a hydration reaction with the chemical heat storage medium HM in the reactor 23 during the heat dissipation operation of the chemical heat pump 21, and the chemical heat storage medium HM inside the reactor 23 is heated during the heat storage operation of the chemical heat pump 21. The common exhaust heat recovery unit 22 can perform the generation of steam for the purpose. Therefore, the steam generation system 11 can be simplified or downsized.

In addition, by using the steam generated using the exhaust heat (exhaust heat recovery unit 22) as at least a part of the steam to be hydrated with the chemical heat storage material HM, it is possible to increase the utilization rate of the exhaust heat. .
(Change example)
The above embodiment may be modified as follows. This embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.

- In the above-described embodiment, the exhaust heat recovery unit 22 is used during the heat radiation operation of the chemical heat pump 21, but a separately prepared evaporator may be used without using the exhaust heat recovery unit 22 during the heat radiation operation. .

When a steam recovery unit containing a recovery material that reacts with hydration is used as the steam recovery unit SR, the steam recovery capacity can be enhanced by further providing an auxiliary recovery unit that does not store the recovery material. The auxiliary recovery device can be configured to have a heat exchanger supplied with a refrigerant such as cold water, for example, and to condense and recover the steam.

The number of heat transport paths 24 (the first heat pipe portion 24a, the second heat pipe portion 24b, and the intermediate heat pipe portion 24c) in the chemical heat pump 21 is not limited to a single number. It is also possible to change to a plurality of heat transport paths 24 by using

- The shapes of the first heat pipe portion 24a, the second heat pipe portion 24b, the intermediate heat pipe portion 24c, and the vapor transfer pipe portion 41 are not limited to a cylindrical shape, and may be changed to other shapes through which fluid can flow. can also

- The steam generation system 11 may include a plurality of steam generators 12 . For example, two steam generators 12, 12 are provided, and steam is generated so that the heat radiation operation of the chemical heat pump 21 of one steam generator 12 and the heat radiation operation of the chemical heat pump 21 of the other steam generator 12 are alternately performed. System 11 can also be configured. In this case, it is possible to continuously supply steam to the supply destination.

DESCRIPTION OF SYMBOLS 11... Steam generation system, 12... Steam generator, 21... Chemical heat pump, 22... Exhaust heat recovery part, 23... Reactor, 24... Heat transport path, 24a... 1st heat pipe part, 24b... 2nd heat pipe part , 24c... intermediate heat pipe section, 25... reservoir, 26... water supply section, 31... steam supply section, 32... control valve, 41... steam transfer pipe section, EJ... ejector, HM... chemical heat storage material, L1... introduction path , L2... Recovery path, P1... Detector, SH... Steam header (supply destination).

Claims (5)

A steam generator comprising: a chemical heat pump for generating steam; a steam supply section for supplying the steam to a supply destination; and a steam transfer pipe section for sending the steam from the chemical heat pump to the steam supply section,
The chemical heat pump is
an exhaust heat recovery unit for recovering exhaust heat;
a reactor containing a chemical heat storage material that stores heat through a dehydration reaction and releases heat through a hydration reaction;
a heat transport path for transporting heat from the exhaust heat recovery unit to the reactor,
The heat transport path is
a first heat pipe section disposed in the exhaust heat recovery section;
a second heat pipe section disposed within the reactor;
an intermediate heat pipe section that transfers heat between the first heat pipe section and the second heat pipe section;
The vapor transfer pipe section is
a configuration in which steam generated inside the second heat pipe portion is sent to the steam supply portion during heat dissipation operation of the chemical heat pump;
The chemical heat pump includes a storage tank for storing condensed water condensed inside the second heat pipe section during a heat storage operation, and a water supply section for supplying water from the storage tank to the second heat pipe section during a heat radiation operation of the chemical heat pump. and a steam generator, further comprising : A steam generator comprising: a chemical heat pump for generating steam; a steam supply section for supplying the steam to a supply destination; and a steam transfer pipe section for sending the steam from the chemical heat pump to the steam supply section,
The chemical heat pump is
an exhaust heat recovery unit for recovering exhaust heat;
a reactor containing a chemical heat storage material that stores heat through a dehydration reaction and releases heat through a hydration reaction;
a heat transport path for transporting heat from the exhaust heat recovery unit to the reactor,
The heat transport path is
a first heat pipe section disposed in the exhaust heat recovery section;
a second heat pipe section disposed within the reactor;
an intermediate heat pipe section that transfers heat between the first heat pipe section and the second heat pipe section;
The vapor transfer pipe section is
a configuration in which steam generated inside the second heat pipe portion is sent to the steam supply portion during heat dissipation operation of the chemical heat pump;
The steam supply unit
a detector for detecting the pressure of the steam sent from the steam transfer pipe;
and a control valve for controlling supply of steam to the supply destination. A steam generator comprising: a chemical heat pump for generating steam; a steam supply section for supplying the steam to a supply destination; and a steam transfer pipe section for sending the steam from the chemical heat pump to the steam supply section,
The chemical heat pump is
an exhaust heat recovery unit for recovering exhaust heat;
a reactor containing a chemical heat storage material that stores heat through a dehydration reaction and releases heat through a hydration reaction;
a heat transport path for transporting heat from the exhaust heat recovery unit to the reactor,
The heat transport path is
a first heat pipe section disposed in the exhaust heat recovery section;
a second heat pipe section disposed within the reactor;
an intermediate heat pipe section that transfers heat between the first heat pipe section and the second heat pipe section;
The vapor transfer pipe section is
a configuration in which steam generated inside the second heat pipe portion is sent to the steam supply portion during heat dissipation operation of the chemical heat pump;
A steam generator according to claim 1, wherein steam used for the hydration reaction in the reactor is introduced from an ejector when the chemical heat pump is operated to release heat. The heat transport path is
4. The steam generator according to claim 3 , wherein the first heat pipe section is connected so as to suck the steam generated inside the first heat pipe section into the ejector. The steam generator according to any one of claims 1 to 4 ;
an introduction path for introducing steam for advancing the hydration reaction of the chemical heat storage material into the reactor;
and a recovery path for recovering steam generated by a dehydration reaction of the chemical heat storage material from within the reactor.

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