Hydrogen boiler and management device

Abstract

To suppress discharge of exhaust gas containing a substance affecting the global environment.SOLUTION: The hydrogen boiler 3 burns, in a combustion chamber of the hydrogen boiler 3, hydrogen gas and oxygen gas supplied from the water electrolyzer 2 that electrolyzes water to generate hydrogen gas and oxygen gas, and heats a water pipe of the hydrogen boiler 3 to generate steam.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The technology disclosed in this specification relates to a hydrogen boiler and a management device. [Background technology]

[0002] The use of hydrogen as an energy source is being considered in various fields. Patent Document 1 discloses a technology relating to a hydrogen production system. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-177773 Summary of the Invention [Problem to be solved by the invention]

[0004] In the field of boiler technology, hydrogen boilers that use hydrogen as fuel have been proposed. When hydrogen boilers burn a mixture of hydrogen and air, there is a possibility that exhaust gases containing substances that have an impact on the global environment may be emitted. Substances that have an impact on the global environment include carbon dioxide (CO2), which has an impact on global warming, and nitrogen oxides (NO), which have an impact on air pollution. x ) is an example.

[0005] The technology disclosed in this specification aims to suppress the emission of exhaust gases containing substances that have an impact on the global environment. [Means for solving the problem]

[0006] The technology disclosed in this specification provides a hydrogen boiler that generates steam by combusting hydrogen gas and oxygen gas supplied from a water electrolysis device that electrolyzes water to generate hydrogen gas and oxygen gas in a combustion chamber and heating water tubes. [Effects of the Invention]

[0007] According to the technology disclosed in this specification, the emission of exhaust gases containing substances that have an impact on the global environment is suppressed. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram schematically illustrating a boiler system according to a first embodiment. [Figure 2] FIG. 2 is a diagram schematically illustrating a boiler system according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] [First embodiment] A first embodiment will be described. Fig. 1 is a diagram schematically showing a boiler system 1A according to the first embodiment. As shown in Fig. 1, the boiler system 1A includes a water electrolysis apparatus 2, a hydrogen boiler 3, a water supply tank 4, a fuel line 5, an exhaust gas line 6, a new water line 7, a water supply line 8, and a steam line 9.

[0010] The water electrolysis device 2 electrolyzes water to generate hydrogen gas and oxygen gas. The water electrolysis device 2 operates using power from the power grid 10. In the water electrolysis device 2, hydrogen gas and oxygen gas are produced by the chemical reaction [H2O → H2 + 1 / 2O2]. The water electrolysis device 2 supplies the hydrogen gas and oxygen gas produced by electrolyzing water to the hydrogen boiler 3.

[0011] The hydrogen boiler 3 combusts the hydrogen gas and oxygen gas supplied from the water electrolysis device 2 in a combustion chamber, heating the water tubes and generating steam. A fuel line 5 connects the water electrolysis device 2 and the hydrogen boiler 3. The hydrogen gas and oxygen gas generated in the water electrolysis device 2 are supplied to the hydrogen boiler 3 via the fuel line 5. The hydrogen gas and oxygen gas are combusted in the combustion chamber of the hydrogen boiler 3.

[0012] The water supply tank 4 stores water to be supplied to the water pipes of the hydrogen boiler 3. A new water line 7 is connected to the water supply tank 4. New water is supplied to the water supply tank 4 via the new water line 7. The new water refers to water supplied from a water supply source (not shown) provided outside the boiler system 1A.

[0013] An exhaust gas line 6 connects the hydrogen boiler 3 and the water supply tank 4. The hydrogen boiler 3 and the water supply tank 4 are connected via the exhaust gas line 6. Water vapor is generated by the combustion of hydrogen gas and oxygen gas in the combustion chamber (also called the combustion space) of the hydrogen boiler 3. In the combustion chamber of the hydrogen boiler 3, water vapor is generated by the chemical reaction [H2 + 1 / 2O2 → H2O]. Water vapor is discharged from the combustion chamber of the hydrogen boiler 3 into the exhaust gas line 6 as exhaust gas. The water vapor discharged from the combustion chamber of the hydrogen boiler 3 is supplied to the water supply tank 4 via the exhaust gas line 6.

[0014] The temperature of the steam is higher than the temperature of the new water. Inside the water supply tank 4, heat exchange occurs between the new water from the new water line 7 and the steam from the exhaust gas line 6. The water supply tank 4 functions as a heat exchanger that directly exchanges heat between the new water from the new water line 7 and the steam from the exhaust gas line 6. The temperature of the new water rises upon contact with the steam. The steam is converted into condensed water upon contact with the new water. In the water supply tank 4, the new water is preheated (warmed) by the steam. Inside the water supply tank 4, feed water (preheated feed water) that is higher in temperature than the new water but lower in temperature than the steam is generated.

[0015] A feedwater line 8 connects the feedwater tank 4 and the hydrogen boiler 3. The hydrogen boiler 3 and the feedwater tank 4 are connected via the feedwater line 8. Preheated feedwater stored in the feedwater tank 4 is supplied to the hydrogen boiler 3 via the feedwater line 8. Condensed water of steam generated in the combustion chamber of the hydrogen boiler 3 by burning hydrogen gas and oxygen gas is used as feedwater for the hydrogen boiler 3.

[0016] The preheated feedwater supplied to the hydrogen boiler 3 is heated through the water pipes, generating steam in the water pipes of the hydrogen boiler 3. The steam generated in the water pipes of the hydrogen boiler 3 is supplied to steam-using equipment via a steam line 9. Examples of steam-using equipment include a sterilizer or a food processing machine.

[0017] As explained above, the hydrogen gas and oxygen gas produced in the water electrolysis device 2 are supplied to the hydrogen boiler 3. All of the hydrogen gas and oxygen gas produced in the water electrolysis device 2 are supplied to the combustion chamber of the hydrogen boiler 3. The hydrogen boiler 3 burns the hydrogen gas and oxygen gas supplied from the water electrolysis device 2 in the combustion chamber of the hydrogen boiler 3, heating the water tubes of the hydrogen boiler 3 and generating water vapor in the water tubes. All of the hydrogen gas and oxygen gas supplied to the hydrogen boiler 3 are converted into water vapor in the combustion chamber. The exhaust gas from the combustion chamber of the hydrogen boiler 3 contains substantially only water vapor. This exhaust gas does not contain carbon dioxide (CO2) or nitrogen oxides (NO x The hydrogen boiler 3 does not contain any substances that have an adverse effect on the global environment, such as hydrogen dioxide. Only water vapor is discharged as exhaust gas from the combustion chamber of the hydrogen boiler 3, which reduces the emission of exhaust gas containing substances that have an adverse effect on the global environment.

[0018] All of the steam discharged from the combustion chamber of the hydrogen boiler 3 is supplied to the feedwater tank 4, where it preheats (warms) the new water. The condensed water of the steam generated in the combustion chamber of the hydrogen boiler 3 by burning hydrogen gas and oxygen gas is used as feedwater for the water pipes of the hydrogen boiler 3. Because all of the steam discharged from the combustion chamber of the hydrogen boiler 3 is supplied to the feedwater tank 4 and used to preheat the new water, there is no need for a chimney to release the exhaust gas (steam) from the combustion chamber of the hydrogen boiler 3 into the atmosphere. Furthermore, because the exhaust gas (steam) from the combustion chamber of the hydrogen boiler 3 directly comes into contact with the new water in the feedwater tank 4, the new water is preheated, so there is no need for an economizer. This reduces the manufacturing and running costs of the boiler system 1A.

[0019] [Second embodiment] A second embodiment will now be described. In the following description, components that are the same as or equivalent to those in the above-described embodiment will be assigned the same reference numerals, and descriptions of those components will be simplified or omitted. FIG. 2 is a diagram schematically showing a boiler system 1B according to the second embodiment. As shown in FIG. 2, the boiler system 1B includes a water electrolysis device 2, a storage device 15, a hydrogen boiler 3, a fossil fuel boiler 11, a steam collection header 12, and a management device 14.

[0020] The storage device 15 stores the hydrogen gas and oxygen gas produced in the water electrolysis device 2. The water electrolysis device 2 and the storage device 15 are connected via a fuel line 5A. The hydrogen gas and oxygen gas produced in the water electrolysis device 2 are supplied to the storage device 15 via the fuel line 5A.

[0021] The storage device 15 and the hydrogen boiler 3 are connected via a fuel line 5B. The hydrogen gas and oxygen gas stored in the storage device 15 are supplied to the combustion chamber of the hydrogen boiler 3 via the fuel line 5B.

[0022] Although not shown in FIG. 2 , similar to the first embodiment described above, steam discharged from the combustion chamber of the hydrogen boiler 3 is supplied to the feedwater tank 4 and used to preheat new water. The preheated feedwater produced in the feedwater tank 4 is supplied to the hydrogen boiler 3. The preheated feedwater supplied to the hydrogen boiler 3 is heated via a water pipe by heat generated in the combustion chamber of the hydrogen boiler 3. Steam is produced in the water pipes of the hydrogen boiler 3 by heating the preheated feedwater. The steam produced in the water pipes of the hydrogen boiler 3 is supplied to the steam collecting header 12 via a steam line 9.

[0023] The fossil fuel boiler 11 burns fossil fuel to generate steam. The fossil fuel boiler 11 burns the fossil fuel in the combustion chamber of the fossil fuel boiler 11, heating the water pipes of the fossil fuel boiler 11 to generate steam. Examples of fossil fuels include oil, coal, and liquefied natural gas (LNG). Although not shown in FIG. 2 , preheated feedwater is supplied to the fossil fuel boiler 11 from the feedwater tank 4 described in the first embodiment. The preheated feedwater supplied to the fossil fuel boiler 11 is heated via the water pipes by heat from the combustion chamber of the fossil fuel boiler 11. Steam is generated in the water pipes of the fossil fuel boiler 11 by heating the preheated feedwater. The steam generated in the water pipes of the fossil fuel boiler 11 is supplied to the steam collecting header 12 via a steam line 13.

[0024] Steam is supplied to a steam collecting header 12 from each of the hydrogen boiler 3 and the fossil fuel boiler 11. The steam collecting header 12 collects the steam from the hydrogen boiler 3 and the steam from the fossil fuel boiler 11. Steam is supplied from the steam collecting header 12 to steam-using equipment. A pressure sensor 20 is disposed in the steam collecting header 12. The pressure sensor 20 detects the pressure of the steam collecting header 12. The detection data of the pressure sensor 20 is sent to a management device 14.

[0025] The management device 14 is a computer that controls the hydrogen boiler 3, the water electrolysis device 2, and the fossil fuel boiler 11. The management device 14 can acquire a request for a demand response. Demand response (DR) refers to changing the pattern of electricity demand by controlling the energy resources held by electricity consumers. Demand responses include an up-demand response that requests an increase in electricity demand, and a down-demand response that requests a reduction in electricity demand. In the following description, a demand response will be referred to as DR as appropriate, an up-demand response will be referred to as up-DR as appropriate, and a down-demand response will be referred to as down-DR as appropriate.

[0026] The power system 10 supplies power generated at power plants to power consumers. Based on a power supply and demand command from a power company, the aggregator requests DR from contracted consumers via a communication network. By complying with the DR request, the consumers can receive compensation from the aggregator. In the embodiment, the energy resources held by the consumers include a water electrolysis device 2. By complying with a request for upward DR, the amount of power consumption by the water electrolysis device 2 increases. By complying with a request for downward DR, the amount of power consumption by the water electrolysis device 2 is reduced.

[0027] The management device 14 can acquire a future DR request in advance before actually acquiring a DR request. Acquiring a future DR request in advance includes at least one of predicting a DR request and acquiring advance notice of a DR request.

[0028] Future DR requests can be predicted based on various prediction factors. Examples of prediction factors for predicting future DR requests include the current power generation capacity of power plants, the current balance of power supply and demand, the season, the time of day, and past DR requests. In addition, an aggregator may notify consumers of a DR request in advance. In this way, the management device 14 can obtain future DR requests in advance before actually obtaining a DR request.

[0029] In an embodiment, when a request for a DR is acquired in advance, the management device 14 adjusts the hydrogen storage rate of the storage device 15 in advance until the request for a DR is actually acquired so that the DR request can be met. When a request for an upward DR is acquired in advance, the management device 14 reduces the hydrogen storage rate of the storage device 15 in advance until the request for an upward DR is actually acquired so that the DR request can be met. When a request for a downward DR is acquired in advance, the management device 14 increases the hydrogen storage rate of the storage device 15 in advance until the downward DR request is actually made so that the downward DR request can be met.

[0030] The management device 14 acquires the operating state of the water electrolysis device 2. The management device 14 acquires the hydrogen storage rate of the storage device 15. The storage device 15 is provided with a pressure sensor 21 that detects the pressure of the storage device 15. The management device 14 can acquire the hydrogen storage rate of the storage device 15 based on detection data from the pressure sensor 21 provided in the storage device 15. The management device 14 determines whether to comply with a DR request from an aggregator based on the operating state of the water electrolysis device 2 and the hydrogen storage rate of the storage device 15. The management device 14 acquires a future DR request in advance before the DR request is actually acquired. As described above, acquiring a DR request in advance includes at least one of predicting a DR request and acquiring an advance notification of a DR request. In an embodiment, the management device 14 predicts a DR request based on the above-described prediction factors.

[0031] In the following description, the time when the management device 14 predicts a future DR request before the DR request is actually acquired will be referred to as the “prediction time.” Also, the time when the management device 14 actually acquires the DR request will be referred to as the “acquisition time.”

[0032] As described above, the management device 14 controls the water electrolysis device 2, the hydrogen boiler 3, and the fossil fuel boiler 11. The water electrolysis device 2 generates hydrogen gas and oxygen gas to be stored in the storage device 15. The hydrogen boiler 3 consumes the hydrogen gas and oxygen gas from the storage device 15. The management device 14 predicts (acquires in advance) future DR requests, and when it determines to comply with the DR request, it controls at least one of the water electrolysis device 2 and the hydrogen boiler 3 so that the hydrogen storage rate of the storage device 15 becomes a target value determined based on the DR until the DR request is actually acquired, and also controls the combustion amount of at least one of the hydrogen boiler 3 and the fossil fuel boiler 11 so that the pressure in the steam collection header 12 becomes the target pressure.

[0033] That is, one or both of the water electrolysis device 2 and the hydrogen boiler 3 are controlled to set the hydrogen storage rate of the storage device 15 to a target value. One or both of the hydrogen boiler 3 and the fossil fuel boiler 11 are controlled to set the pressure of the steam collection header 12 to a target pressure.

[0034] The target pressure of the steam collecting header 12 is a concept that includes one or both of the target pressure value of the steam collecting header 12 and the pressure range between the upper limit pressure value and the lower limit pressure value.

[0035] The combustion rate [kcal / h] refers to the amount of heat generated per unit time in the combustion chamber of the boiler (3, 11). The greater the fuel flow rate supplied to the boiler's combustion chamber, the higher the combustion rate. The smaller the fuel flow rate supplied to the combustion chamber, the lower the combustion rate. The higher the combustion rate, the greater the amount of steam generated in the boiler's water pipes, and the greater the amount of steam supplied to the steam collecting header 12. The lower the combustion rate, the less steam generated in the boiler's water pipes, and the less steam supplied to the steam collecting header 12.

[0036] Correlation data showing the relationship between the pressure of the steam collecting header 12 and the required combustion volume of the boiler is obtained in advance so that the pressure of the steam collecting header 12 becomes the target pressure. The required combustion volume of the boiler refers to the combustion volume required of the boiler to make the steam collecting header 12 become the target pressure. When the boiler combustion volume is high, the amount of steam supplied from the boiler to the steam collecting header 12 increases. When the boiler combustion volume is low, the amount of steam supplied from the boiler to the steam collecting header 12 decreases.

[0037] When multiple boilers (hydrogen boiler 3 and fossil fuel boiler 11) are connected to the steam collecting header 12, the pressure of the steam collecting header 12 is controlled to be a constant pressure value or a constant pressure range. If the amount of steam supplied from the boilers (3, 11) to the steam collecting header 12 fluctuates or if the amount of steam used by the steam-using equipment fluctuates, the difference between the actual pressure of the steam collecting header 12 and the target pressure may increase. If the difference between the actual pressure of the steam collecting header 12 and the target pressure increases, the management device 14 determines the required combustion amount of the boilers (3, 11) based on the actual pressure of the steam collecting header 12 (detection data from the pressure sensor 20) and the above-mentioned correlation data so as to reduce the difference between the actual pressure of the steam collecting header 12 and the target pressure. The management device 14 performs control to change the combustion amount of the boilers (3, 11) based on the determined required combustion amount.

[0038] When a request for an upward DR is predicted and it is determined that the request for an upward DR should be complied with, the management device 14 performs one or both of the following controls: reducing the amount of hydrogen gas produced by the water electrolysis device 2 and increasing the amount of hydrogen gas consumed by the hydrogen boiler 3, so that the hydrogen storage rate of the storage device 15 becomes a first target value until the time the request for an upward DR is acquired. The first target value may be any value between 20% and 55%, for example.

[0039] When a request for a lowering DR is predicted and it is determined that the request for a lowering DR should be complied with, the management device 14 performs one or both of the following controls: increasing the amount of hydrogen produced by the water electrolysis device 2 and decreasing the amount of hydrogen consumed by the hydrogen boiler 3, so that the hydrogen storage rate of the storage device 15 reaches a second target value higher than the first target value until the time the request for a lowering DR is acquired. The second target value may be any value between 55% and 90%, for example.

[0040] When a request for an upward DR is predicted and it is determined that the request for an upward DR should be complied with, increasing the hydrogen consumption rate by the hydrogen boiler 3 so that the hydrogen storage rate in the storage device 15 becomes a first target value will increase the combustion rate of the hydrogen boiler 3, and therefore increase the amount of steam supplied from the hydrogen boiler 3 to the steam collecting header 12. When a request for a downward DR is predicted and it is determined that the request for an upward DR should be complied with, decreasing the hydrogen consumption rate by the hydrogen boiler 3 so that the hydrogen storage rate in the storage device 15 becomes a second target value that is higher than the first target value will decrease the combustion rate of the hydrogen boiler 3, and therefore decrease the amount of steam supplied from the hydrogen boiler 3 to the steam collecting header 12.

[0041] In this way, when the combustion rate of the hydrogen boiler 3 is controlled so that the hydrogen storage rate of the storage device 15 becomes the target value, the pressure of the steam collecting header 12 fluctuates. Therefore, in this embodiment, if there is a difference between the actual pressure of the steam collecting header 12 and the target pressure, the management device 14 controls the combustion rate of the fossil fuel boiler 11 exclusively to make the actual pressure of the steam collecting header 12 the target pressure. In other words, when the management device 14 predicts a DR request and determines to comply with the DR request, it controls the fossil fuel boiler 11 with priority over the hydrogen boiler 3 so that the pressure of the steam collecting header 12 becomes the target pressure.

[0042] <When a request for an upward DR is expected> When a request for an upward DR is predicted, it is necessary to reduce the hydrogen storage rate of the storage device 15 (to the first target value) by the time the request for an upward DR is actually received.

[0043] After a request for an upward DR is predicted and one or both of the amount of hydrogen produced by the water electrolysis device 2 and the combustion rate of the hydrogen boiler 3 are set so that the hydrogen storage rate of the storage device 15 decreases (to the first target value), if the pressure of the steam collection header 12 falls below the target pressure between the time the request for an upward DR is predicted and the time the request for an upward DR is acquired, and the required combustion rate of the boiler increases, the management device 14 controls the fossil fuel boiler 11 to increase the combustion rate so that the required combustion rate is obtained, without changing the combustion rate of the hydrogen boiler 3. In this way, by controlling the fossil fuel boiler 11 with priority over control of the hydrogen boiler 3, the management device 14 can quickly bring the hydrogen storage rate to the first target value and bring the pressure of the steam collection header 12 closer to the target pressure. Note that it is sufficient for the hydrogen storage rate to reach the first target value by the time the request for an upward DR is acquired. Therefore, if the period from the time when the request for an upward DR is predicted to the time when it is acquired is long and controlling the fossil fuel boiler 11 to the maximum combustion amount does not achieve the required combustion amount of the boiler, the management device 14 may increase the combustion amount of the hydrogen boiler 3 during that period.

[0044] After a request for an upward DR is predicted and one or both of the amount of hydrogen produced by the water electrolysis device 2 and the combustion rate of the hydrogen boiler 3 are set so that the hydrogen storage rate of the storage device 15 decreases (to the first target value), if the pressure in the steam collection header 12 increases above the target pressure between the time the request for an upward DR is predicted and the time the request for an upward DR is acquired, reducing the boiler's required combustion rate, the management device 14 controls the fossil fuel boiler 11 to reduce the combustion rate so that the required combustion rate is obtained without changing the combustion rate of the hydrogen boiler 3. In this way, by controlling the fossil fuel boiler 11 with priority over control of the hydrogen boiler 3, the management device 14 can quickly bring the hydrogen storage rate to the first target value and bring the pressure in the steam collection header 12 closer to the target pressure. Note that it is sufficient for the hydrogen storage rate to reach the first target value by the time the request for an upward DR is acquired. Therefore, if the period from the time when the upward DR request is predicted to the time when it is acquired is long and stopping the fossil fuel boiler 11 does not achieve the required boiler combustion volume, the management device 14 may reduce the combustion volume of the hydrogen boiler 3 during that period.

[0045] <When a request for downward DR is expected> When a request for a lower DR is predicted, it is necessary to increase the hydrogen storage rate of the storage device 15 (to the second target value) by the time the request for a lower DR is actually received.

[0046] After a request for a downward DR is predicted and one or both of the amount of hydrogen produced by the water electrolysis device 2 and the combustion rate of the hydrogen boiler 3 are set so that the hydrogen storage rate of the storage device 15 increases (to the second target value), if the pressure of the steam collection header 12 falls below the target pressure between the time the downward DR request is predicted and the time the request is obtained, and the required combustion rate of the boiler increases, the management device 14 controls the fossil fuel boiler 11 to increase the combustion rate so that the required combustion rate is obtained, without changing the combustion rate of the hydrogen boiler 3. In this way, by controlling the fossil fuel boiler 11 with priority over control of the hydrogen boiler 3, the management device 14 can quickly bring the hydrogen storage rate to the second target value and bring the pressure of the steam collection header 12 closer to the target pressure. Note that it is sufficient for the hydrogen storage rate to reach the second target value by the time the request for a downward DR is obtained. Therefore, if the period from the time when the request for a downward DR is predicted to the time when it is obtained is long and controlling the fossil fuel boiler 11 to the maximum combustion amount does not achieve the required combustion amount of the boiler, the management device 14 may increase the combustion amount of the hydrogen boiler 3 during that period.

[0047] After a request for a downward DR is predicted and one or both of the amount of hydrogen produced by the water electrolysis device 2 and the combustion rate of the hydrogen boiler 3 are set so that the hydrogen storage rate of the storage device 15 increases (to the second target value), if the pressure in the steam collection header 12 increases above the target pressure between the time the downward DR request is predicted and the time the request is received, reducing the boiler's required combustion rate, the management device 14 controls the fossil fuel boiler 11 to reduce the combustion rate so that the required combustion rate is obtained without changing the combustion rate of the hydrogen boiler 3. In this way, by controlling the fossil fuel boiler 11 with priority over control of the hydrogen boiler 3, the management device 14 can quickly bring the hydrogen storage rate to the second target value and bring the pressure in the steam collection header 12 closer to the target pressure. Note that it is sufficient for the hydrogen storage rate to reach the second target value by the time the request for a downward DR is received. Therefore, if the period from the time when the request for a lower DR is predicted to the time when it is obtained is long and stopping the fossil fuel boiler 11 does not achieve the required combustion volume of the boiler, the management device 14 may reduce the combustion volume of the hydrogen boiler 3 during that period.

[0048] [Contribution to the United Nations-led Sustainable Development Goals (SDGs)] The technology disclosed in this specification includes items that contribute to the realization of Goal 7 of the SDGs (Sustainable Development Goals), "Affordable and clean energy." [Explanation of symbols]

[0049] 1A...Boiler system, 1B...Boiler system, 2...Water electrolysis device, 3...Hydrogen boiler, 4...Water supply tank, 5...Fuel line, 5A...Fuel line, 5B...Fuel line, 6...Exhaust gas line, 7...New water line, 8...Water supply line, 9...Steam line, 10...Power system, 11...Fossil fuel boiler, 12...Steam collection header, 13...Steam line, 14...Management device, 15...Storage device, 20...Pressure sensor, 21...Pressure sensor.

Claims

1. Hydrogen gas and oxygen gas supplied from a water electrolysis device that electrolyzes water to generate hydrogen gas and oxygen gas are combusted in a combustion chamber to heat a water tube and generate water vapor. Hydrogen boiler.

2. Condensed water of water vapor generated in the combustion chamber by combusting the hydrogen gas and the oxygen gas is used as water to be supplied to the water pipe. The hydrogen boiler according to claim 1.

3. The combustion chamber and the water supply tank are connected via an exhaust gas line, The water vapor generated in the combustion chamber is supplied to the water supply tank through the exhaust gas line. The hydrogen boiler according to claim 2.

4. Inside the water supply tank, heat is exchanged between the new water from the new water line and the water vapor from the exhaust gas line. The hydrogen boiler according to claim 3.

5. 10. A management device for controlling the hydrogen boiler according to claim 1, a water electrolysis device that supplies hydrogen gas and oxygen gas produced by electrolyzing water to the hydrogen boiler, and a fossil fuel boiler that burns fossil fuel to produce steam, a request for demand response is acquired in advance, and when it is determined that the request for demand response is to be complied with, the fossil fuel boiler is controlled in preference to the hydrogen boiler so that the pressure of a steam collection header in which steam from the hydrogen boiler and the fossil fuel boiler is collected reaches a target pressure; Management device.

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