A water circulation system

Abstract

The present invention relates to the technical field of energy utilization, and specifically to a water circulation system, comprising: a gas turbine; a supplementary combustion type waste heat boiler connected to the gas turbine; the gas turbine outputs water vapor that enters the supplementary combustion type waste heat boiler, mixes with the water vapor in the supplementary combustion type waste heat boiler and heats the circulating feed water, so that the water vapor enters the steam turbine to perform work; a water electrolysis device is connected to the gas turbine and the supplementary combustion type waste heat boiler, and is used to electrolyze liquid water discharged from the gas turbine and the supplementary combustion type waste heat boiler to generate hydrogen, and transport the hydrogen to the gas turbine and the supplementary combustion type waste heat boiler through a pipeline; the present application generates hydrogen by electrolyzing water through a water electrolysis device, and provides fuel for the gas turbine and the supplementary combustion type waste heat boiler; through hydrogen supplementary combustion, the water vapor flow rate is increased and the water vapor temperature is increased, thereby enhancing heat exchange; through the recycling of hydrogen and water, a large amount of hydrogen is provided for the internal combustion engine and the supplementary combustion type waste heat boiler of the power plant, carbon emissions are reduced, and significant environmental protection effects are achieved; water resources and fuel are saved, and costs are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of energy utilization, and in particular to a water circulation system. Background Art

[0002] Compared with traditional coal-fired power plants, gas-steam combined cycle power plants have the advantages of low pollution, high unit efficiency and rapid response. They have been widely used, but there is still the problem of high carbon emissions.

[0003] In recent years, hydrogen energy has developed rapidly due to its advantages such as cleanliness, environmental protection and sustainable utilization. With the continuous improvement of technologies such as hydrogen production, storage and transportation, hydrogen energy has very good application and development prospects.

[0004] However, in existing power plants, hydrogen is usually transported from hydrogen manufacturers to power plants by hydrogen transport vehicles. The combustion of gas turbines in power plants requires a large amount of hydrogen, but the transportation volume of hydrogen transport vehicles is limited and the transportation cost is high, which makes it difficult to meet the needs of gas turbines in power plants. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the amount of hydrogen in the power plant cannot meet the needs of the internal combustion engines of the power plant. Based on the above situation, it is necessary to develop a system for providing a large amount of hydrogen in the power plant.

[0006] In order to achieve the above object, the present invention provides a water circulation system, comprising:

[0007] a gas turbine having a first hydrogen inlet;

[0008] The supplementary-fired waste heat boiler is connected to the gas turbine and has a second hydrogen inlet; the water vapor output by the gas turbine enters the supplementary-fired waste heat boiler, is mixed with the water vapor generated by the combustion of the supplementary-fired hydrogen in the supplementary-fired waste heat boiler, and after being evenly mixed, the circulating feed water in the supplementary-fired waste heat boiler is heated, so that the circulating feed water is converted into water vapor and then enters the steam turbine to perform work;

[0009] The water electrolysis device is connected to the gas turbine and the supplementary-fired waste heat boiler, and is used to receive liquid water discharged from the gas turbine and the supplementary-fired waste heat boiler, and to generate hydrogen through electrolysis. The hydrogen generated by electrolysis is then transported to the gas turbine and the supplementary-fired waste heat boiler again through pipelines.

[0010] Optionally, it also includes:

[0011] The heating device is arranged between the supplementary-fired waste heat boiler and the water electrolysis device and is connected to the gas turbine; it is used to receive the liquid water discharged from the supplementary-fired waste heat boiler and use the discharged liquid water to preheat the hydrogen generated by the water electrolysis device, and the preheated hydrogen is transported to the gas turbine and the supplementary-fired waste heat boiler for combustion.

[0012] Optionally, it also includes:

[0013] The first hydrogen storage device is connected to the water electrolysis device and is used to store hydrogen.

[0014] Optionally, it also includes:

[0015] The second hydrogen storage device is connected to both the first hydrogen storage device and the heating device.

[0016] Optionally, it also includes:

[0017] Condenser and condensate pump connected to steam turbine;

[0018] The condensate pump is also connected to the supplementary-fired waste heat boiler.

[0019] Optionally, it also includes:

[0020] The water storage tank is connected to the gas turbine, the supplementary combustion type waste heat boiler, the heating device, and the water electrolysis device, and is used to store liquid water after being used by the gas turbine and the heating device, and to replenish water for the gas turbine, the supplementary combustion type waste heat boiler, and the water electrolysis device.

[0021] Optionally, it also includes:

[0022] A water purification device, connected to the water storage tank, for purifying liquid water entering the water storage tank;

[0023] The desalination device is connected to the water purification device and is used to remove salt from the liquid water entering the water purification device.

[0024] Optionally, it also includes:

[0025] A dryer connected to the water electrolysis device as a pre-process device for hydrogen purification, used to remove water mixed in the hydrogen;

[0026] The hydrogen processor is connected to the dryer, the gas turbine and the supplementary-fired waste heat boiler, and is used to purify the hydrogen entering the gas turbine and the supplementary-fired waste heat boiler.

[0027] Optionally, it also includes:

[0028] The hydrogen control module is connected to the gas turbine, the supplementary combustion type waste heat boiler, and the water electrolysis device, and is used to adjust the flow rate, temperature and pressure of the hydrogen supply.

[0029] Optionally, it also includes:

[0030] The water treatment device is arranged between the supplementary combustion type waste heat boiler and the heating device, and is used for desalting and filtering the liquid water entering the heating device.

[0031] The above technical solution of the present invention has the following advantages compared with the prior art:

[0032] 1. The water circulation system provided by the present invention comprises: a gas turbine having a first hydrogen inlet; a supplementary combustion type waste heat boiler connected to the gas turbine and having a second hydrogen inlet; the water vapor output by the gas turbine enters the supplementary combustion type waste heat boiler, and is mixed with the water vapor generated by the combustion of the supplementary combustion hydrogen in the supplementary combustion type waste heat boiler, and after being evenly mixed, the circulating feed water in the supplementary combustion type waste heat boiler is heated, so that the circulating feed water is converted into water vapor and enters the steam turbine to perform work; a water electrolysis device is connected to the gas turbine and the supplementary combustion type waste heat boiler, and is used to receive liquid water discharged from the gas turbine and the supplementary combustion type waste heat boiler, and electrolyze to generate hydrogen, and the hydrogen generated by the electrolysis is transported to the gas turbine and the supplementary combustion type waste heat boiler again through a pipeline; the present invention Please propose a technical solution that uses a water electrolysis device to electrolyze water to produce hydrogen, provide fuel for the gas turbine and the supplementary burning type waste heat boiler, and use the high-temperature steam in the supplementary burning type waste heat boiler to heat the low-temperature steam output by the gas turbine, and then use heat exchange to convert the circulating feed water in the supplementary burning type waste heat boiler into a high-energy working medium to drive the steam turbine to do work; and by setting up a supplementary burning type waste heat boiler, the flow rate of water vapor can be increased and the temperature of water vapor can be increased to enhance the work capacity; at the same time, by recycling hydrogen and water, a large amount of hydrogen can be provided for the gas turbine and the supplementary burning type waste heat boiler in the power plant, which not only reduces carbon emissions and has a significant environmental protection effect; but also saves water resources and fuel costs, reduces production costs, and improves the economic benefits of the power plant.

[0033] 2. The water circulation system provided by the present invention also includes: a heating device, which is arranged between the supplementary burning type waste heat boiler and the water electrolysis device, and is connected to the gas turbine; it is used to receive liquid water discharged from the supplementary burning type waste heat boiler, and use the discharged liquid water to preheat the hydrogen generated by the water electrolysis device, and the preheated hydrogen is transported to the gas turbine and the supplementary burning type waste heat boiler; the present application adopts the above technical scheme to make full use of the high-temperature liquid water discharged from the supplementary burning type waste heat boiler, and preheat the required hydrogen in advance, which not only saves hydrogen consumption, but also makes the combustion of hydrogen more complete, thereby improving the operating efficiency of the supplementary burning type waste heat boiler and the gas turbine.

[0034] 3. The water circulation system provided by the present invention also includes: a first hydrogen storage device, which is connected to the water electrolysis device and is used to store hydrogen; the present application adopts the above technical solution, and by setting up the first hydrogen storage device, excess hydrogen can be stored to prepare for the next operation of the gas turbine and the supplementary combustion type waste heat boiler, thereby improving the operating efficiency of the gas turbine and the supplementary combustion type waste heat boiler.

[0035] 4. The water circulation system provided by the present invention also includes: a second hydrogen storage device, which is connected to both the first hydrogen storage device and the heating device; the technical solution of the present application can be used as a supply or backup of hydrogen by setting up the second hydrogen storage device.

[0036] 5. The water circulation system provided by the present invention also includes: a condenser and a condensate pump connected to the steam turbine; the condensate pump is also connected to the supplementary burning type waste heat boiler; the present application condenses the water vapor in the steam turbine into liquid water by setting up a condenser and a condensate pump, and transports the liquid water to the supplementary burning type waste heat boiler for continued use, thereby saving water resources.

[0037] 6. The water circulation system provided by the present invention also includes: a water storage tank, which is connected to the gas turbine, the supplementary combustion type waste heat boiler, the heating device, and the water electrolysis device, and is used to store liquid water after use by the gas turbine and the heating device, and to replenish water for the gas turbine, the supplementary combustion type waste heat boiler and the water electrolysis device; the technical solution of the present application collects and stores liquid water in the water circulation system by setting up a water storage tank, and provides liquid water for the water electrolysis device, thereby saving water resources and allowing the entire water cycle to operate reliably and stably.

[0038] 7. The water circulation system provided by the present invention also includes: a water purification device, connected to the water storage tank, for purifying the liquid water entering the water storage tank; a desalination device, connected to the water purification device, for removing salt from the liquid water entering the water purification device; this application adopts the above technical solution to ensure that the purity of water meets the requirements for hydrogen production by electrolysis of water.

[0039] 8. The water circulation system provided by the present invention also includes: a dryer, connected to the water electrolysis device, serving as a pre-processing device for hydrogen purification, used to remove moisture mixed in the hydrogen; a hydrogen processor, connected to the dryer, the gas turbine, and the supplementary burning type waste heat boiler, used to purify the hydrogen entering the gas turbine and the supplementary burning type waste heat boiler; this application adopts the above technical solution to ensure that the purity of the hydrogen meets the use requirements of the gas turbine and the supplementary burning type waste heat boiler.

[0040] 9. The water circulation system provided by the present invention also includes: a hydrogen control module, which is connected to the gas turbine, the supplementary combustion type waste heat boiler, and the water electrolysis device, and is used to adjust the flow rate, temperature and pressure of the hydrogen supply; the present application adopts the above-mentioned technical scheme, and by setting up a hydrogen control module, according to the operating conditions of the gas turbine, the inlet and outlet parameters of hydrogen and the inlet and outlet parameters of circulating water, the flow rate, temperature and pressure of the hydrogen supply are adjusted to ensure the normal operation of the water circulation system.

[0041] 10. The water circulation system provided by the present invention also includes: a water treatment device, which is arranged between the supplementary combustion type waste heat boiler and the heating device, and is used to desalinate and filter the liquid water entering the heating device; the technical solution of the present application desalinates and filters the liquid water by setting a water treatment device, thereby preventing the liquid water from clogging or damaging the heating device, ensuring the normal operation of the heating device and extending the life of the heating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 Schematic diagram of the connection structure of the water circulation system provided in an embodiment of the present invention.

[0044] Description of reference numerals:

[0045] 1. Gas turbine; 2. Supplementary combustion type waste heat boiler; 3. Water treatment device; 4. Heating device; 5. Desalination device; 6. Water purification device; 7. Water storage tank; 8. Water electrolysis device; 9. Dryer; 10. Hydrogen treatment device; 11. First hydrogen storage device; 12. Second hydrogen storage device; 13. Hydrogen control module; 14. Condenser; 15. Condensate pump; 16. Steam turbine. DETAILED DESCRIPTION

[0046] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0050] like Figure 1 A specific embodiment of the water circulation system shown includes: a gas turbine 1, a supplementary combustion type waste heat boiler 2, a water processor 3 and a heating device 4 connected in sequence, a water electrolysis device 8, a dryer 9, a hydrogen processor 10, a first hydrogen storage device 11 and a hydrogen control module 13 connected in sequence, a desalination device 5, a water purification device 6 and a water storage tank 7 connected in sequence, etc.

[0051] The gas turbine 1 has a first hydrogen inlet; the supplementary-fired waste heat boiler 2 has a second hydrogen inlet; the high-temperature and high-pressure water vapor output from the combustion chamber of the gas turbine 1 drives the turbine to do work and drives the generator to work, and the utilized water vapor enters the supplementary-fired waste heat boiler 2, and is mixed with the high-temperature water vapor generated by the combustion of the supplementary-fired hydrogen in the supplementary-fired waste heat boiler 2, and after being evenly mixed, heat is exchanged with the circulating feed water in the supplementary-fired waste heat boiler 2 through a heat exchanger, so that the circulating feed water is heated and converted into water vapor, and then enters the steam turbine 16 to do work and drive the generator to work; specifically, the heat exchanger is a compact heat exchanger, which can avoid excessive internal pressure of the supplementary-fired waste heat boiler 2 during operation, thereby preventing safety accidents.

[0052] The water electrolysis device 8 is connected to the gas turbine 1 and the supplementary combustion type waste heat boiler 2, and is used to receive the liquid water discharged from the gas turbine 1 and the supplementary combustion type waste heat boiler 2, and generate hydrogen by electrolysis. The hydrogen generated by electrolysis is transported to the gas turbine 1 and the supplementary combustion type waste heat boiler 2 again through the pipeline, and is used as the fuel of the gas turbine 1 and the supplementary combustion type waste heat boiler 2. For the supplementary combustion type waste heat boiler 2, it is supplementary combustion hydrogen. Specifically, the water electrolysis device 8 is connected to the gas turbine 1 through the desalination device 5, the water purification device 6, the water storage tank 7, the solenoid valve and the water pump connected in sequence to receive the liquid water of the gas turbine 1. The supplementary combustion type waste heat boiler 2 is connected to the water inlet pipeline of the desalination device 5 through the water treatment device 3 and the heating device 4 connected in sequence, and then connected to the water electrolysis device 8 through the desalination device 5, the water purification device 6, the water storage tank 7, the solenoid valve and the water pump connected in sequence. Specifically, the water treatment device 3 is used to desalinate and filter the liquid water entering the heating device 4. The water purification device 6 can adopt one or more coupling methods such as membrane distillation, filtration and ion exchange to ensure that the purity of water meets the requirements of hydrogen production by electrolysis of water. The hydrogen processor 10 is used to purify hydrogen, and can adopt one or more coupling methods such as physical or chemical absorption, chemical reaction, pressure swing adsorption separation, low temperature separation, polymer membrane separation, low temperature adsorption and palladium membrane separation to ensure that the purity of hydrogen meets the use requirements of the gas turbine 1 and the supplementary combustion type waste heat boiler 2.

[0053] The high temperature liquid water in the supplementary combustion type waste heat boiler 2 utilizes waste heat in the heating device 4. Waste heat can not only preheat hydrogen, but also be used for heating. Heating technologies such as absorption heat pumps and compression heat pumps can be used, which has a good energy-saving effect.

[0054] After hydrogenation and reburning in the reburning type waste heat boiler 2, the flow rate and temperature of the water vapor in the water circulation system are significantly increased, which can enable the circulating feed water to absorb more heat, enhance its working capacity, and thus improve the power generation efficiency of the steam turbine 16; at the same time, due to the large water vapor flow rate, the working capacity of the heating device 4 is also significantly improved.

[0055] The pipeline between the first hydrogen storage device 11 and the hydrogen control module 13 passes through the heating device 4 to preheat the hydrogen; specifically, the first hydrogen storage device 11 is a hydrogen storage tank. The hydrogen control module 13 is connected to the gas turbine 1 and the supplementary combustion type waste heat boiler 2, and is used to adjust the flow, temperature and pressure of the hydrogen supply. Further, a pressure reducing valve and a solenoid valve connected in sequence are set on the pipeline connecting the first hydrogen storage device 11 and the heating device 4; and three second hydrogen storage devices 12 are connected in parallel on the pipeline connecting the first hydrogen storage device 11 and the heating device 4, and a pressure reducing valve and a solenoid valve connected in sequence are set on the pipeline connected to each second hydrogen storage device 12. Specifically, the second hydrogen storage device 12 is a hydrogen unloading column. Further, after the heating device 4 is connected to the gas turbine 1, it is connected to the water inlet pipeline of the desalination device 5 to receive liquid water discharged from the gas turbine 1 and the heating device 4.

[0056] The steam turbine 16 is connected to the supplementary combustion type waste heat boiler 2 through the condenser 14 and the condensation pump 15 connected in sequence. The water storage tank 7 is also connected to the gas turbine 1 through the electromagnetic valve and the water pump connected in sequence, and is used to supplement the cooling water required by the combustion chamber of the gas turbine 1 to avoid excessive combustion temperature and excessive thermal nitrogen oxides; and the water storage tank 7 is also connected to the condenser 14 through the electromagnetic valve and the water pump connected in sequence, and is used to supplement the circulating feed water reduced due to dissipation and other reasons.

[0057] The use process of the water circulation system described in this application is briefly described as follows: When the water circulation system is put into operation for the first time, the hydrogen unloading column can provide the hydrogen required for the combustion of the gas turbine 1 and the supplementary combustion type waste heat boiler 2. When the hydrogen generated by the water electrolysis device 8 is sufficient for the water circulation system to operate continuously at full load, and the water stored in the water storage tank 7 is sufficient for the water circulation system to operate normally, the hydrogen unloading column is stopped to supply hydrogen, and only the water electrolysis device 8 is relied on to supply hydrogen to ensure that the water circulation system can operate normally; or before the first operation, liquid water is actively added to the water storage tank 7 in advance, and sufficient hydrogen is generated by the water electrolysis device 8 for subsequent use; in addition, the above two methods can also be used in combination. When the power generation task of the day is completed, an appropriate amount of hydrogen can be produced in advance by the water electrolysis device 8 and stored in the hydrogen storage tank to prepare for the next power generation of the water circulation system.

[0058] When the water circulation system is in normal operation, hydrogen enters the gas turbine 1 and burns to produce high-temperature and high-pressure water vapor, which works in the turbine and drives the generator to generate electricity. The water vapor discharged from the turbine enters the supplementary combustion type waste heat boiler 2, mixes with the high-temperature water vapor generated by the combustion of supplementary combustion hydrogen, and then fully exchanges heat with the circulating feed water in the supplementary combustion type waste heat boiler 2, so that it becomes water vapor and enters the steam turbine 16 to work, driving the generator to generate electricity. After the heat exchange, the water vapor becomes high-temperature liquid water, which flows to the heating device 4 to preheat the hydrogen after treatment, and finally uses the residual heat for heating. After the residual heat is used, the liquid water discharged from the heating device 4 and the liquid water discharged from the gas turbine 1 are collected together and desalinated and purified, and then stored in the water storage tank 7, which is used to supplement the circulating feed water in the supplementary combustion type waste heat boiler 2, supplement the cooling water in the combustion chamber of the gas turbine 1, and provide water source to the water electrolysis device 8. The hydrogen generated by the water electrolysis device 8 passes through the dryer 9 and the hydrogen processor 10 in turn, and flows into the hydrogen storage tank; the hydrogen in the hydrogen storage tank passes through the pressure reducing valve and the solenoid valve in turn, and flows into the heating device 4 for preheating; the preheated hydrogen enters the hydrogen control module 13, and then through the hydrogen control module 13, the hydrogen is diverted and transported to the gas turbine 1 and the supplementary combustion type waste heat boiler 2, and finally used for combustion in the gas turbine 1 and the supplementary combustion type waste heat boiler 2. When the amount of water or hydrogen in the water circulation system is slightly reduced due to dissipation and other effects, an appropriate amount of water can be actively added to the water storage tank 7; when the amount of water or hydrogen in the water circulation system is obviously insufficient and the production task is urgent, an appropriate amount of hydrogen can be continuously added to the hydrogen unloading column, and an appropriate amount of water can be actively added to the water storage tank 7 to ensure the normal operation of the water circulation system. Among them, parameters such as the quantity and volume of major storage equipment such as the water storage tank 7, the first hydrogen storage device 11 and the second hydrogen storage device 12 can be appropriately adjusted according to the scale of the water circulation system and usage requirements; the quantity, functional capacity and connection method of equipment such as the water electrolysis device 8, the dryer 9, the hydrogen processor 10, the desalination device 5 and the water purification device 6 can be appropriately selected before the construction of the water circulation system according to the scale of the water circulation system and usage requirements.

[0059] Obviously, the above embodiments are merely examples for clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from them are still within the protection scope of the invention.

Claims

1. A water circulation system, characterized in that: include: A gas turbine (1) having a first hydrogen inlet; The supplementary-fired waste heat boiler (2) is connected to the gas turbine (1) and has a second hydrogen inlet; the water vapor output by the gas turbine (1) enters the supplementary-fired waste heat boiler (2), is mixed with the water vapor generated by the combustion of the supplementary-fired hydrogen in the supplementary-fired waste heat boiler (2), and after being evenly mixed, heats the circulating feed water in the supplementary-fired waste heat boiler (2), so that the circulating feed water is converted into water vapor and then enters the steam turbine (16) to perform work; A water electrolysis device (8) is connected to the gas turbine (1) and the supplementary combustion type waste heat boiler (2), and is used to receive liquid water discharged from the gas turbine (1) and the supplementary combustion type waste heat boiler (2), and to generate hydrogen through electrolysis. The hydrogen generated by electrolysis is transported to the gas turbine (1) and the supplementary combustion type waste heat boiler (2) again through a pipeline; Also includes: The heating device (4) is arranged between the supplementary-fired waste heat boiler (2) and the water electrolysis device (8), and is connected to the gas turbine (1); it is used to receive liquid water discharged from the supplementary-fired waste heat boiler (2), and use the discharged liquid water to preheat hydrogen generated by the water electrolysis device (8); the preheated hydrogen is transported to the gas turbine (1) and the supplementary-fired waste heat boiler (2) for combustion.

2. The water circulation system according to claim 1, characterized in that: Also includes: The first hydrogen storage device (11) is connected to the water electrolysis device (8) and is used to store hydrogen.

3. The water circulation system according to claim 2, characterized in that: Also includes: The second hydrogen storage device (12) is connected to both the first hydrogen storage device (11) and the heating device (4).

4. The water circulation system according to any one of claims 1 to 3, characterized in that: Also includes: A condenser (14) and a condensate pump (15) connected to a steam turbine (16); The condensate pump (15) is also connected to the supplementary-fired waste heat boiler (2).

5. The water circulation system according to any one of claims 1 to 3, characterized in that: Also includes: The water storage tank (7) is connected to the gas turbine (1), the supplementary combustion type waste heat boiler (2), the heating device (4), and the water electrolysis device (8), and is used to store liquid water after being used by the gas turbine (1) and the heating device (4), and to replenish water for the gas turbine (1), the supplementary combustion type waste heat boiler (2), and the water electrolysis device (8).

6. The water circulation system according to claim 5, characterized in that: Also includes: A water purification device (6) is connected to the water storage tank (7) and is used to purify liquid water entering the water storage tank (7); The desalination device (5) is connected to the water purification device (6) and is used to remove salt from the liquid water entering the water purification device (6).

7. The water circulation system according to any one of claims 1 to 3, characterized in that: Also includes: A dryer (9), connected to the water electrolysis device (8), serving as a pre-process device for hydrogen purification, for removing water mixed in the hydrogen; The hydrogen processor (10) is connected to the dryer (9), the gas turbine (1), and the supplementary-fired waste heat boiler (2), and is used to purify the hydrogen entering the gas turbine (1) and the supplementary-fired waste heat boiler (2).

8. The water circulation system according to any one of claims 1 to 3, characterized in that: Also includes: The hydrogen control module (13) is connected to the gas turbine (1), the supplementary combustion type waste heat boiler (2), and the water electrolysis device (8), and is used to adjust the flow rate, temperature and pressure of the hydrogen supply.

9. The water circulation system according to any one of claims 1 to 3, characterized in that: Also includes: The water treatment device (3) is arranged between the supplementary combustion type waste heat boiler (2) and the heating device (4) and is used for desalinating and filtering the liquid water entering the heating device (4).

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