JP7337437B2 - boiler - Google Patents

Description

The present invention relates to a boiler for heating supplied water.

2. Description of the Related Art Conventionally, boilers that heat supplied water are widely used for various purposes including industrial and commercial purposes. A boiler is provided with heat generating means for heating water to be supplied, and one form of this heat generating means is one in which a heating element is provided inside a container.

In addition, there are various specific forms of such heat generating means. As one example, a reactant (heat generating element) having a surface formed with a plurality of metal nanoparticles made of a hydrogen absorbing metal or a hydrogen absorbing alloy is placed inside a container. is disclosed in Patent Document 1 as a heat generation system. According to Patent Document 1, in this heat generation system, hydrogen atoms are occluded in the metal nanoparticles by supplying a hydrogen-based gas that contributes to heat generation into the container, and excessive heat is generated.

As described in Patent Document 1, a heating element made of palladium is provided inside the container, and deuterium gas is supplied to the inside of the container to heat the inside of the container, thereby generating an exothermic reaction. announcement is made. In addition, with regard to the exothermic phenomenon in which excess heat (output enthalpy higher than input enthalpy) is generated using hydrogen storage metals or hydrogen storage alloys, the details of the mechanism that generates excess heat are being discussed among researchers in various countries. , reported to have generated an exothermic phenomenon.

Patent No. 6448074 U.S. Pat. No. 9,182,365

In a boiler that heats water by means of heat generating means provided with a heating element inside the container, for example, for the purpose of activating the movement of gas in the container and promoting heat transfer, a circulation path that includes the inside of the container as a part It can be effective to circulate the gas at In particular, when the above-mentioned reactants are used as heat generating bodies, it is important to circulate the hydrogen-based gas in the vessel from the viewpoint of promoting reactions that generate excessive heat.

However, the gas in the container is heated by the heating element to a high temperature. As a result, the required heat resistance temperature (required heat resistance temperature) of devices (such as gas pumps and gas filters) installed in the circulation path through which such high-temperature gas circulates becomes high, and problems such as an increase in the manufacturing cost of boilers arise. Become.

In view of the above problems, the present invention heats water by means of heat generating means provided with a heating element inside the container, and it is easy to lower the required heat resistance temperature of the device provided in the circulation path for circulating the gas in the container. The purpose is to provide a boiler that is

A boiler according to the present invention comprises a heating element, a container in which the heating element is provided and which can be filled with a gas having a higher specific heat than air, and a path through which the gas circulates, the container and the outside of the container. and a circulation path including a gas path arranged in a boiler for heating water using the heat generated by the heating element, wherein the first heat exchanger and the second heat are arranged in order from the upstream side in the gas path An exchanger is provided to return heat recovered from the gas in the first heat exchanger back to the gas in the second heat exchanger.

According to this configuration, the water is heated by the heating means provided with the heating element inside the container, and it becomes easy to lower the required heat resistance temperature of the device provided in the circulation path for circulating the gas in the container. That is, the required heat resistance temperature of the device can be lowered simply by arranging the device between the first heat exchanger and the second heat exchanger.

Further, more specifically, as the above configuration, a gas pump that flows the gas from the upstream side to the downstream side of the gas path, or a gas filter that removes impurities contained in the gas, is the first heat exchanger in the gas path. It is good also as a structure provided between the 2nd heat exchangers. According to this configuration, it is possible to lower the required heat resistance temperature of the gas pump or the gas filter.

More specifically, as the above configuration, the heat recovered from the gas in the first heat exchanger is transferred to the second heat exchanger by circulating the heat medium between the first heat exchanger and the second heat exchanger. The heat medium may be returned to the gas in a vessel, and the circulation of the heat medium may be controlled based on the temperature of the gas. According to this configuration, it is possible to efficiently circulate the heat medium.

Further, more specifically as the above configuration, the gas is a hydrogen-based gas, the heating element is provided with metal nanoparticles made of hydrogen-absorbing metals on the surface, and the hydrogen-based gas is placed in the container. It may be configured to be a reactant in which hydrogen atoms are occluded within the metal nanoparticles to generate excess heat under the conditions in which they are supplied. In addition, the hydrogen-based gas in the present application means deuterium gas, light hydrogen gas, or a mixed gas thereof. In the present application, "hydrogen storage metals" means hydrogen storage metals such as Pd, Ni, Pt and Ti, or hydrogen storage alloys containing one or more of these.

Further, more specifically, as the above configuration, the boiler includes a water tube heated by heat generated by the heating element, and the water is heated by passing through the water tube, wherein the water tube surrounds the heating element. It is good also as the structure arranged. According to this configuration, it is possible to very efficiently transfer the heat generated by the heating element to the water to be heated.

According to the boiler according to the present invention, water is heated by a heating means provided with a heating element inside the vessel, and it is easy to lower the required heat resistance temperature of the device provided in the circulation path for circulating the gas in the vessel. becomes.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram of the boiler 1 which concerns on 1st Embodiment. FIG. 2 is an explanatory diagram of a course of water passing through a water tube of the boiler 1; It is a schematic block diagram of the boiler 2 which concerns on 2nd Embodiment. It is a typical block diagram of the boiler 1a which makes a heat medium flow through a water path.

A boiler according to each embodiment of the present invention will be described below with reference to each drawing.

1. First Embodiment First, a first embodiment of the present invention will be described. FIG. 1 is a schematic configuration diagram of a boiler 1 according to the first embodiment. As shown in this figure, the boiler 1 includes a vessel 11, a reactant 12, a heater 13, a gas path 14, a gas receiving section 15, a gas pump 16, a gas filter 17, a separator 21, a water path 22, a water receiving section 23, a water pump 24 , a first heat exchanger 31 , a second heat exchanger 32 , a thermal circulation path 33 and a thermal circulation pump 34 .

1 (similarly to FIGS. 3 and 4, which will be described later), the state of the container 11 and its interior is represented as a schematic cross-sectional view when the container 11 is roughly divided into two planes. (the vertical direction corresponds to the vertical direction) is as shown in this figure. 1 (similar to FIGS. 3 and 4) schematically shows the arrangement of the water pipes 22a.

The container 11 is generally formed in a cylindrical shape having bottoms at both upper and lower ends, and is formed so as to be able to seal gas inside. More specifically, the container 11 has a cylindrical side wall 11a formed by a water pipe 22a, which will be described later. 11c. In this embodiment, as an example, the side wall 11a of the container 11 is cylindrical, but it may be formed in another cylindrical shape. Further, a can body cover may be installed around the outer periphery of the side wall 11a, and a heat insulating material may be provided between the side wall 11a and the can body cover.

The reactant 12 is configured by providing a large number of metal nanoparticles on the surface of a carrier whose entirety is formed in a fine mesh shape. The carrier is made of a hydrogen absorbing alloy (hydrogen absorbing metal or hydrogen absorbing alloy) as a material, and is formed in a cylindrical shape having bottoms at both ends with the top and bottom being the axial direction. The upper surface of the reactant 12 is connected to the gas path 14 , and the gas that has flowed into the reactant 12 through the mesh-like gaps can be delivered into the gas path 14 . In the example of this embodiment, three reactants 12 are arranged in the horizontal direction inside the container 11 .

The heater 13 is spirally wound around the side surface of the reaction body 12 formed in a bottomed cylindrical shape, and is formed to generate heat using supplied power. A ceramic heater, for example, may be employed as the heater 13 . The heat generated by the heater 13 heats the reactant 12, and the temperature of the reactant 12 can be raised to a predetermined reaction temperature at which a reaction for generating excess heat, which will be described later, is likely to occur. Note that the temperature of the heater 13 can be adjusted by controlling the power supplied to the heater 13 .

The gas path 14 is provided outside the container 11 and forms a gas circulation path including the inside of the container 11 as a part. The ends are connected to the interior of the container 11 . More specifically, the portions of the gas path 14 connected to the upper surface of each reactant 12 merge in the container 11 to form a single path that penetrates the upper bottom portion 11b, and then the gas receiving portion 15, Through the first heat exchanger 31 , the gas pump 16 , the gas filter 17 and the second heat exchanger 32 in order, the lower bottom portion 11 c is further penetrated and connected to the inside of the container 11 .

The gas receiving unit 15 is configured to receive a supply of hydrogen-based gas (deuterium gas, light hydrogen gas, or mixed gas thereof) from an external supply source, and the supplied hydrogen-based gas is introduced into the gas path 15. flow into For example, when the hydrogen-based gas is supplied to the gas receiving unit 15 from a tank storing the hydrogen-based gas in advance, this tank becomes the supply source of the hydrogen-based gas.

The rotation speed of the gas pump 16 is controlled, for example, by inverter control, and the gas in the gas path 14 flows from the upstream side to the downstream side (that is, in the direction indicated by the dotted arrow in FIG. 1) at a flow rate corresponding to this rotation speed. make it The amount of gas circulating in the circulation path including the gas path 14 can be adjusted by controlling the rotation speed of the gas pump 16 .

The gas filter 17 removes impurities contained in the gas in the gas path 14, especially those that inhibit reactions that generate excess heat in the reactants 12. FIG. The separator 21 receives the steam generated by heating the water when passing through the water tube 22a, and separates the steam from the steam (separates the drain contained in the steam). The steam separated from steam in the separator 21 can be supplied to the outside of the boiler 1 .

The water path 22 is a water path connecting from the water receiving portion 23 to the separator 21 . A part of the water path 22 is a water pipe 22a forming the side wall 11a described above. A water pump 24 is arranged in the middle of the water path 22 at a position immediately downstream of the water receiving portion 23 . In the water path 22, liquid water supplied from the water receiving portion 23 flows in the upstream side of the water pipe 22a, and in the downstream side of the water pipe 22a (between the container 11 and the separator 21), Water (steam) heated and vaporized in the water tube 22a flows.

The water receiving portion 23 is configured to appropriately receive water, which is a source of steam, from the outside, and allows the supplied water to flow into the water path 22 . The water pump 24 causes the water in the water path 22 to flow from the upstream side to the downstream side (that is, in the direction indicated by the solid arrow in FIG. 1).

The water tube 22a spirally extends from the lower bottom portion 11c toward the upper bottom portion 11b so as to form the cylindrical side wall 11a of the container 11 . That is, the water pipe 22a spirally extends in the axial direction (vertical direction) of the cylindrical side wall 11a so that there is no gap between vertically adjacent water pipes 22a. In addition, in the example of this embodiment, the cross-sectional shape of the inner wall of the water tube 22a is square, but it may be circular or other shape.

The first heat exchanger 31 is provided upstream of the gas pump 16 in the gas path 14 , and the second heat exchanger 32 is provided downstream of the gas filter 17 in the gas path 14 . Thus, in the gas path 14 , the second heat exchanger 32 is provided downstream of the first heat exchanger 31 , and the gas pump 16 and the gas pump 16 are provided between the first heat exchanger 31 and the second heat exchanger 32 . A gas filter 17 is provided.

The heat circulation path 33 is a path for circulating the heat medium X (such as water for the heat medium), and is arranged so as to pass through the first heat exchanger 31 and the second heat exchanger 32 . Further, the thermal circulation path 33 is provided with a thermal circulation pump 34 that causes the heat medium X to flow through the path. The first heat exchanger 31 and the second heat exchanger 32 are formed as heat exchangers that exchange heat between the heat medium X and the gas in the gas path 14 .

Next, operation of the boiler 1 will be described. In the boiler 1, the hydrogen-based gas is supplied from an external supply source to the gas receiving portion 15, and the gas circulation path including the inside of the container 11 and the gas path 14 is filled with the hydrogen-based gas. By the action of the gas pump 16, the filled hydrogen-based gas circulates in the direction indicated by the dotted arrow in FIG.

At this time, in the interior of the container 11 , the hydrogen-based gas flows into the interior through the mesh-like gaps of the reactant 12 , and then is delivered into the gas path 14 connected to the upper portion of the reactant 12 . At the same time, the reactant 12 is heated by the action of the heater 13 . In this way, when the reactant 12 is heated by the heater 13 while the hydrogen-based gas is supplied to the inside of the container 11, hydrogen atoms are occluded in the metal nanoparticles provided in the reactant 12, and the reactant 12 is heated by the heater 13. generate excess heat above the heating temperature by Reactant 12 thus functions as a heating element by undergoing a reaction that generates excess heat. The principle of the reaction that generates excess heat is the same as the principle of the reaction that generates excess heat disclosed in Patent Document 1, for example.

Impurities are removed from the hydrogen-based gas in the circulation path including the inside of the container 11 when passing through the gas filter 17 . Therefore, the high-purity hydrogen-based gas from which impurities are removed is continuously supplied to the inside of the container 11 . As a result, it is possible to stably supply a hydrogen-based gas of high purity to the reactant 12, maintain a state in which excessive heat output is likely to occur, and effectively generate heat in the reactant 12.

Water is supplied from the outside to the water receiving portion 23 in parallel with the operation of generating heat in the reactant 12 described above. The supplied water is caused to flow through the water path 22 in the direction indicated by the solid line arrow in FIG.

Water flowing in water path 22 is heated by the heat given off by reactants 12 as it passes through water tubes 22a that form sidewall 11a of vessel 11 . That is, the heat generated by the reactant 12 is transmitted to the water tube 22a by convection (heat transfer) and radiation of the hydrogen-based gas in the container 11, and the water flowing inside is heated by the water tube 22a, which has reached a high temperature.

FIG. 2 schematically shows the course of water through the water tube 22a with solid arrows. As shown in this figure, the water entering the water tube 22a from the inlet α (the bottom of the water tube 22a) of the water tube 22a advances along the passage in the spirally extending water tube 22a and exits the water tube 22a at the outlet β ( The steam is discharged toward the separator 21 from the top of the water pipe 22a). At this time, the temperature of the water passing through the water tube 22a rises as the heat from the water tube 22a (side wall 11a of the container) heated by the heat generated by the reactant 12 is transferred.

In this way, the water flowing through the water path 22 is heated when passing through the water tube 22a, the temperature rises, and finally becomes steam. This steam is sent to the separator 21 and is supplied to the outside of the boiler 1 after the dryness is increased by steam-water separation.

The amount of steam supplied from the separator 21 to the outside may be adjustable according to the required amount of steam (steam load) from the outside. When the amount of steam supplied to the outside is less than the appropriate amount, the amount of heat generated by the reactant 12 is increased to increase the amount of steam generated. This can be achieved by reducing the amount of steam generated.

The amount of heat generated by the reactant 12 can be controlled by adjusting the temperature of the heater 13 or the amount of circulation of the gas described above. can be increased. Further, in the boiler 1, water is sequentially supplied to the water receiving part 23 by the amount of steam supplied to the outside, that is, the amount of water decreased, and steam is continuously generated and supplied to the outside. It is possible to

Furthermore, the thermal circulation pump 34 is driven in parallel with the operation of generating heat from the reactant 12 , and the heat medium X is circulated in the thermal circulation path 33 . Thereby, the heat recovered from the gas in the gas path 14 by the first heat exchanger 31 is returned to the gas by the second heat exchanger 32 .

More specifically, in the first heat exchanger 31, the temperature of the gas in the gas path 14 is higher than that of the heat medium X, and heat exchange between the two causes the gas to heat the heat medium X. Heat is recovered and the gas is cooled accordingly. As a result, the heat medium X whose temperature has risen is sent to the second heat exchanger 32 via the thermal circulation path 33, while the cooled gas is sent to the second heat exchanger 32 via the gas path 14. .

Due to the heat exchange in the first heat exchanger 31 , the temperature of the gas in the gas path 14 is lower than that of the heat medium X in the second heat exchanger 32 . Therefore, in the second heat exchanger 32, heat is returned from the heat medium X to the gas by heat exchange between the two, and the temperature of the gas rises by that amount. The heat medium X thus cooled returns to the first heat exchanger 31 through the heat circulation path 33 and is used again to recover heat from the gas.

By continuously performing heat exchange in the first heat exchanger 31 and the second heat exchanger 32, the temperature of the gas in the gas path 14 is changed to between the first heat exchanger 31 and the second heat exchanger 32. It is possible to lower it temporarily in between. As a result, the gas whose temperature is temporarily lowered passes through the gas pump 16 and the gas filter 17 provided between the first heat exchanger 31 and the second heat exchanger 32. It is possible to lower the heat resistance temperature (required heat resistance temperature) required for these devices. It should be noted that the gas cooled by the first heat exchanger 31 has almost returned to the temperature before cooling at the stage of flowing into the container 11 via the second heat exchanger 32 . Therefore, the influence of the gas cooling in the first heat exchanger 31 on the heat generation of the reactant 12 and the heating of the water passing through the water tube 22a is minimized.

In this embodiment, of the devices provided in the gas path 14, both the gas pump 16 and the gas filter 17 are provided between the first heat exchanger 31 and the second heat exchanger 32. It is also possible to provide only one between the first heat exchanger 31 and the second heat exchanger 32 . When a device other than the gas pump 16 and the gas filter 17 is provided in the gas path 14, this device should also be provided between the first heat exchanger 31 and the second heat exchanger 32 to lower the required heat resistance temperature of the device. is also possible. In addition, in the portion of the heat circulation path 33 downstream of the first heat exchanger 31 (upstream of the second heat exchanger 32), heat exchange in the first heat exchanger 31 (heat from hydrogen-based gas The heat medium X which has reached a high temperature due to the recovery) flows. Therefore, from the viewpoint of lowering the required heat resistance temperature of the heat circulation pump 34, as shown in FIG. is preferred.

Alternatively, the temperature of the gas in the circulation path including the gas path 14 may be detected, and the circulation of the heat medium X may be controlled based on the temperature of the gas. For example, a sensor that detects the temperature of the gas is provided at a predetermined location (preferably, a location immediately upstream of the first heat exchanger 31) in the gas path 14, and the higher the detected value of the sensor, the more the heat medium X You may make it increase the circulation amount of. In addition, the heat medium X is not circulated under the condition that the detection value of the sensor does not exceed the predetermined allowable upper limit (for example, the lower one of the required heat resistance temperatures of the gas pump 16 and the gas filter 17). and the heat medium X may be circulated when the allowable upper limit is exceeded. In this way, the heat medium can be circulated more properly, and the heat medium can be efficiently circulated.

2. Second Embodiment Next, a second embodiment of the present invention will be described. The second embodiment is basically the same as the first embodiment except for the form of the heating element and points related thereto. In the following description, emphasis is placed on the description of items different from the first embodiment, and description of items common to the first embodiment may be omitted.

FIG. 3 is a schematic configuration diagram of the boiler 2 in the second embodiment. In the boiler 1 of the first embodiment, the reactant 12 was employed as the heating element, but in the second embodiment, a general heating element 12a is employed instead. Note that the heating element 12a here is, for example, a halogen heater that generates heat when supplied with electric power. Also, the shape and dimensions of the heating element 12a are assumed to be the same as those of the reactant 12 for convenience. When the heating element 12a is used as the heating element, there is no need to generate excessive heat as in the first embodiment, and the heater 13 is not required, so its installation is omitted. Further, the upstream end of the gas path 14 in the second embodiment is connected to the upper bottom portion 11b instead of the heating element 12a, and is connected to the space inside the container 11. As shown in FIG.

In the boiler 2, the water tube 22a is heated by the heat emitted from the heating element 12a instead of the reactant 12, and the temperature of the water passing through the water tube 22a rises due to the heat transmitted from the water tube 22a (side wall 11a of the container). Become. Further, in this form, the above-described reaction for generating excess heat is unnecessary, and by directly controlling the temperature of the heating element 12a by power control, it is possible to appropriately heat water and generate steam. can.

Further, in the boiler 2, it is possible to control the amount of heat generated by the heating element 12a (heating element) by adjusting the power supplied to the heating element 12a. As the amount of heat generated by the heating element 12a is increased, the water passing through the water tube 22a is heated more strongly, and the amount of steam generated in the boiler 2 can be increased.

3. Others The boilers 1 and 2 of each of the embodiments described above include a heating element and a container 11 in which the heating element is provided, and heat supplied water to generate steam. Furthermore, in each of the boilers 1 and 2, the water pipe 22a is heated by the heat generated by the heating element in an environment where the container 11 is filled with a gas having a higher specific heat than air (hydrogen-based gas in the example of this embodiment). , so that the water passing through the water tube 22a (the water from which steam is generated) is heated. For example, under the conditions of 200°C and 1 atm, the specific heat of air is about 1,026 J/Kg°C, while the specific heat of hydrogen is about 14,528 J/Kg°C, which is much higher than the specific heat of air. It's becoming In addition, as the heating element, the boiler 1 employs the reactant 12, and the boiler 2 employs the heating element 12a.

According to each of the boilers 1 and 2, water is heated by the heating means provided with the heating element inside the container 11 to generate steam, and the heat generated by the heating element can be efficiently transferred to the water. It is possible. That is, for example, when a heat medium such as a fluid other than water is circulated through a water pipe and this heat medium is heat-exchanged with water outside the container 11, heat loss or the like may occur due to interposition or transportation of the heat medium. In this respect, in each of the boilers 1 and 2, the heat medium for recovering the heat generated by the heat generating element is not required by arranging the water tube itself so as to surround the heat generating element. As a result, the above-mentioned heat loss and the like can be suppressed, and the heat generated by the heating element can be efficiently transferred to the water, which is the source of the steam.

Furthermore, since the inside of the container 11 is filled with a gas having a higher specific heat than air, heat transfer is better than when filled with general air, and the heat generated by the heating element becomes a source of steam. It can efficiently transmit to water. Moreover, since the specific heat is high, the temperature of the gas is less likely to fluctuate, and heat can be more stably transferred to the water.

Moreover, since the water pipe 22a forms the entire circumference of the cylindrical side wall 11a, it is possible to efficiently transfer the heat generated by the heating element to the water that is the source of the steam. In particular, since the water tube 22a in this embodiment is arranged so as to surround the heat generating element, it covers almost the entire area of the entire circumference of the side wall 11a, and the heat generated by the heat generating element is used as a source of steam with as little waste as possible. It is possible to transmit to water. In each of the above embodiments, the water tubes extend spirally and are arranged so as to surround the heating element. However, the form surrounding the heating element is not limited to this. may be adopted.

In each of the above embodiments, the side wall 11a for sealing the gas in the container 11 is formed by the water tube 22a, but instead, the side wall 11a is provided separately from the water tube 22a, A water tube 22a may be provided (that is, inside the container 11). Even in this case, it is possible to heat the water tube 22a by the heat generated by the heating element in an environment where the inside of the container 11 is filled with a gas having a higher specific heat than air. In this case, the water tubes 22a do not need to function as the side walls 11a, but it is preferable that there is a gap between the vertically adjacent water tubes 22a so that the heat from the heating element can be received more easily.

In each of the boilers 1 and 2, the gas is circulated in a circulation path including the inside of the container 11 as a part. As a result, it is expected that the movement of the gas in the container 11 will be activated and the heat will be more effectively transferred from the gas to the side wall 11a. Especially in the boiler 1 of the first embodiment, it is important to circulate the gas in order to promote the reaction that generates excess heat in the reactants 12 . Since the boiler 2 of the second embodiment does not require a reaction that generates excess heat, a gas other than a hydrogen-based gas may be used as the gas having a higher specific heat than air.

Each of the boilers 1 and 2 is provided with a circulation path including a vessel 11 and a gas path 14 arranged outside the vessel 11 as a path through which the gas circulates. A first heat exchanger 31 and a second heat exchanger 32 are provided such that the heat recovered from the gas in the first heat exchanger 31 is returned to the gas in the second heat exchanger 32 . Therefore, the required heat resistance temperature of the gas pump 16 and the gas filter 17 provided between these heat exchangers 31 and 32 can be lowered.

In each of the above-described embodiments, the water path 22 including the water tube 22a is made to flow water, which is the source of steam. ) is allowed to flow, and the heat medium Y can be used to heat water, which is the source of steam. A schematic configuration diagram of a boiler configured in this way is illustrated in FIG.

In the boiler 1a shown in FIG. 4, a heat exchanger 50 is provided in place of the separator 21. In the heat exchanger 50, a part of the water path 22 through which the heat medium Y flows is arranged, and a source of steam. water is supplied. Note that the heat medium Y circulates through the water path 22 including the water pipe 22a, as indicated by the solid line arrows in this figure. As a result, the heat medium Y heated by the reactant 12 (heating element) is sent to the heat exchanger 50, and the supplied water is heated by the heat medium Y to generate steam, which can be supplied to the outside. is. The heat exchanger 50 may be configured to heat water to generate steam, or may be configured to generate hot water.

As the heat exchanger 50, for example, a plate-type or shell-and-tube heat exchanger may be employed, or various types of steam generators may be employed. An example of this steam generator has a storage space for storing the supplied water, and a tubular body arranged in the storage space through which the heat medium Y passes. A structure that is transmitted to the stored water is exemplified.

Although the embodiments of the present invention have been described above, the configuration of the present invention is not limited to the above embodiments, and various modifications can be made without departing from the gist of the invention. That is, the above-described embodiments should be considered as examples in all respects and not restrictive. For example, the boiler according to the present invention can be applied to a hot water boiler, a heat medium boiler, etc., in addition to the boiler for generating steam as in the above embodiment. The technical scope of the present invention is defined by the scope of claims rather than the description of the above embodiments, and is understood to include all modifications within the scope and meaning equivalent to the scope of claims. should.

INDUSTRIAL APPLICABILITY The present invention is applicable to boilers for various uses.

Reference Signs List 1, 1a, 2 boiler 11 container 11a side wall 11b upper base 11c lower base 12 reactant 12a heating element 13 heater 14 gas path 15 gas receiving part 16 gas pump 17 gas filter 21 separator 22 water path 22a water tube 23 water receiving part 24 water pump 31 first heat exchanger 32 second heat exchanger 33 heat circulation path 34 heat circulation pump 50 heat exchanger

Claims (4)

a heating element;
a container in which the heating element is provided and which can be filled with a gas having a higher specific heat than air;
a circulation path including a gas path arranged outside the vessel and the vessel as a path through which the gas circulates,
A boiler that heats water using the heat generated by the heating element,
A first heat exchanger and a second heat exchanger are provided in order from the upstream side in the gas path,
By circulating a heat medium between the first heat exchanger and the second heat exchanger, the heat recovered from the gas in the first heat exchanger is returned to the gas in the second heat exchanger. ,
A boiler , wherein the circulation of the heat medium is controlled based on the temperature of the gas . A gas pump that causes the gas to flow from the upstream side to the downstream side of the gas path, or a gas filter that removes impurities contained in the gas is provided between the first heat exchanger and the second heat exchanger in the gas path. 2. The boiler according to claim 1, characterized in that: the gas is a hydrogen-based gas,
The heating element is
Metal nanoparticles made of hydrogen storage metals are provided on the surface,
3. The reactant according to claim 1 or 2, wherein hydrogen atoms are occluded in the metal nanoparticles to generate excess heat when the hydrogen-based gas is supplied into the container. boiler. 4. The boiler according to any one of claims 1 to 3, comprising a water tube that is heated by heat generated by the heating element, and the water is heated by passing through the water tube,
The water tube is arranged to surround the heating element.boiler.