A hydrogen electrolysis coupled gas turbine power generation system

Abstract

The present application proposes an electrolytic hydrogen production coupled gas turbine power generation system, including an electrolytic hydrogen production system, a gas turbine power generation system and a waste heat utilization system, wherein the gas turbine power generation system is used to supply power to the electrolytic hydrogen production system, the electrolytic hydrogen production system supplies hydrogen to the gas turbine power generation system through a first pipeline, and the gas turbine power generation system is connected to the waste heat utilization system through a second pipeline to introduce exhaust steam. The present application integrates a renewable energy power generation system, an electrolytic hydrogen production system and a gas turbine power generation system to effectively reduce the volatility of renewable energy and provide a stable and high-quality power input to the power grid; by using a hydrogen-blended gas turbine, carbon emissions in the gas turbine power generation process can be effectively reduced, and the hydrogen-blended gas turbine can be modified on the basis of an existing natural gas gas turbine, saving costs and reducing the cost of preparing pure water for hydrogen production by water electrolysis.

Description

Technical Field

[0001] The present application relates to the technical field of hydrogen production by electrolysis, and in particular to a hydrogen production by electrolysis coupled with a gas turbine power generation system. Background Art

[0002] With the global transition to low-carbon energy, countries around the world are actively exploring new ways of power supply to replace traditional coal-fired power generation. Gas turbine power generation has attracted the attention of governments around the world because its carbon emissions are significantly lower than traditional coal-fired power generation. At present, gas turbine power generation uses natural gas as raw material. Natural gas power generation is significantly cleaner than coal-fired power generation, but it still produces a certain carbon footprint during the combustion process. In addition, as a non-renewable energy source, natural gas has certain limitations in its storage capacity. Renewable energy, as an inexhaustible energy source, helps promote environmental governance and ecological protection, and is conducive to the sustainable development of human society. However, since renewable energy generation is usually intermittent and volatile, it is difficult to provide a stable and high-quality power supply. Summary of the invention

[0003] The present application aims to solve one of the technical problems in the related art at least to some extent.

[0004] To this end, the purpose of this application is to propose an electrolysis hydrogen production coupled gas turbine power generation system. This application integrates a renewable energy power generation system, an electrolysis hydrogen production system and a gas turbine power generation system to effectively reduce the volatility of renewable energy and provide stable, high-quality power input to the power grid; the use of a hydrogen-blended gas turbine can effectively reduce carbon emissions during gas turbine power generation, and the hydrogen-blended gas turbine can be modified on the basis of an existing natural gas gas turbine to save costs; by setting up a waste heat utilization system to utilize the waste heat generated by the exhaust steam after the gas turbine combustion power generation, the energy conversion efficiency of the system is improved, and the cost of preparing pure water for hydrogen production by electrolysis of water is reduced.

[0005] To achieve the above-mentioned purpose, the present application proposes an electrolytic hydrogen production coupled gas turbine power generation system, including an electrolytic hydrogen production system, a gas turbine power generation system and a waste heat utilization system, wherein the gas turbine power generation system is used to supply power to the electrolytic hydrogen production system, the electrolytic hydrogen production system supplies hydrogen to the gas turbine power generation system through a first pipeline, the gas turbine power generation system is connected to the waste heat utilization system through a second pipeline to introduce exhaust steam, the waste heat utilization system is connected to the electrolytic hydrogen production mechanism through a third pipeline to supply water, and also includes a renewable energy power generation system, and the renewable energy power generation system is electrically connected to the electrolytic hydrogen production system.

[0006] Furthermore, the waste heat utilization system includes a regenerator, a raw water heat exchanger, a membrane distillation component and a water production heat exchanger connected in sequence through pipelines, the gas turbine power generation system passes exhaust gas to the regenerator through the second pipeline, the regenerator passes low-temperature flue gas to the raw water heat exchanger through a pipeline, the raw water heat exchanger is connected to raw water outside, the raw water and the low-temperature flue gas are heated by heat exchange in the regenerator, the raw water heated in the raw water heat exchanger is passed into the membrane distillation component through a pipeline, and the water outlet of the membrane distillation component is connected to the water production heat exchanger to pass pure water.

[0007] Furthermore, the gas turbine power generation system includes a gas turbine, a power generation device and a compressor connected in sequence through pipelines, the gas turbine drives the power generation device to generate electricity, the power generation device is electrically connected to the electrolysis hydrogen production system for power supply, the power generation device passes exhaust gas to the regenerator through the second pipeline, the compressor is connected to the regenerator through a fourth pipeline to pass air, the air and the exhaust gas exchange heat in the regenerator, and the air heated in the regenerator flows back to the gas turbine.

[0008] Furthermore, the electrolysis hydrogen production system includes an electrolyzer, a gas-liquid separator, a gas cooler and a water mist droplet collector which are connected in sequence through pipelines, the power generation equipment is electrically connected to the electrolyzer, and the water mist droplet collector is connected to the gas turbine through the first pipeline for introducing hydrogen.

[0009] Furthermore, the electrolysis hydrogen production system also includes a hydrogen storage tank, which is arranged on the pipeline between the water mist droplet collector and the gas turbine, and the hydrogen storage tank is connected to the gas turbine through the first pipeline.

[0010] Furthermore, the electrolytic hydrogen production system also includes an electrolyte heat exchanger, and the electrolyte heat exchanger, the electrolytic cell and the gas-liquid separator are connected end to end in sequence through pipelines to form a circulation loop.

[0011] Furthermore, the electrolytic hydrogen production system also includes a water replenishment system, which is connected to the electrolytic cell through a pipeline, and the water production heat exchanger is connected to the water replenishment system through the third pipeline to allow pure water to flow into it.

[0012] Furthermore, it also includes a power grid system, and the power generation equipment and the electrolytic cell are electrically connected to the power grid system respectively.

[0013] Furthermore, an inverter is also provided at the input end of the power grid system.

[0014] Furthermore, the electrolyzer, the power generation equipment and the power grid system are electrically connected to the renewable energy power generation system respectively.

[0015] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0017] Figure 1 It is a structural schematic diagram of a hydrogen electrolysis coupled gas turbine power generation system proposed in one embodiment of the present application. DETAILED DESCRIPTION

[0018] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be construed as limiting the present application. On the contrary, the embodiments of the present application include all changes, modifications and equivalents that fall within the spirit and connotation of the appended claims.

[0019] Figure 1 It is a structural schematic diagram of a hydrogen electrolysis coupled gas turbine power generation system proposed in one embodiment of the present application.

[0020] See also Figure 1 A hydrogen electrolysis coupled gas turbine power generation system, comprising an electrolysis hydrogen production system, a gas turbine power generation system and a waste heat utilization system, wherein the gas turbine power generation system is used to supply power to the hydrogen electrolysis system, the hydrogen electrolysis system supplies hydrogen to the gas turbine power generation system through a first pipeline 1, the gas turbine power generation system is connected to the waste heat utilization system through a second pipeline 2 for introducing exhaust steam, the waste heat utilization system is connected to the hydrogen electrolysis mechanism through a third pipeline 3 for supplying water, and also includes a renewable energy power generation system 4, which is electrically connected to the hydrogen electrolysis system.

[0021] In this embodiment, a gas turbine power generation system and a renewable energy power generation system are respectively electrically connected to the electrolytic hydrogen production system, and the water electrolysis hydrogen production system is used to absorb the surplus electricity during the peak period of renewable energy power generation. When the renewable energy power generation is insufficient to supply electricity consumption, the gas turbine power generation system is used to burn hydrogen to generate electricity to supplement the electricity gap, thereby achieving stable operation of the electrolytic hydrogen production system and effectively reducing the volatility of renewable energy.

[0022] Specifically, renewable energy includes but is not limited to wind power generation, photovoltaic power generation, etc. Using renewable energy to produce hydrogen by electrolysis can achieve zero carbon emissions in hydrogen production, and the fuel source of the gas turbine power generation system can come from the hydrogen produced by the electrolysis hydrogen production system.

[0023] The waste heat utilization system includes a regenerator 5, a raw water heat exchanger 6, a membrane distillation component 7 and a water production heat exchanger 8 which are connected in sequence through pipelines. The gas turbine power generation system passes exhaust gas to the regenerator 5 through the second pipeline 2. The regenerator 5 passes low-temperature flue gas to the raw water heat exchanger 6 through a pipeline. The raw water heat exchanger 6 is externally connected to raw water. The raw water and the low-temperature flue gas are heat-exchanged and heated in the regenerator 5. The raw water heated in the raw water heat exchanger 6 is passed into the membrane distillation component 7 through a pipeline. The water outlet of the membrane distillation component 7 is connected to the water production heat exchanger 8 to allow pure water to be passed in. Specifically, exhaust gas is introduced into the regenerator 5. After the exhaust gas and air exchange heat in the regenerator 5, the air is heated and refluxed into the gas turbine. The low-temperature flue gas after heat exchange in the regenerator 5 flows into the raw water heat exchanger 6. The raw water enters the membrane distillation module 7 after being heated by the raw water heat exchanger 6. Under the action of the pressure difference on both sides of the membrane distillation module 7, the raw water enters the water production side in the form of water vapor. After condensation on the water production side of the membrane distillation module 7, pure water is obtained and enters the water production heat exchanger 8, and then enters the electrolytic cell through the water replenishment system to replenish the water consumed in the electrolysis process of the electrolytic cell. The raw water heat exchanger 6 uses the waste heat generated by the power generation equipment to preliminarily heat and heat the raw water, saving energy consumption for the subsequent distillation process, ensuring the reliable operation of the membrane distillation module, realizing the recycling of heat in the system, and reducing the overall energy consumption of the system.

[0024] The gas turbine power generation system comprises a gas turbine 9, a power generation device 10 and a compressor 11 connected in sequence through pipelines. The gas turbine 9 drives the power generation device 10 to generate electricity. The power generation device 10 is electrically connected to the electrolytic hydrogen production system for power supply. The power generation device 10 passes exhaust gas to the regenerator 5 through the second pipeline 2. The compressor 11 is connected to the regenerator 5 through the fourth pipeline 12 to pass air. The air and the exhaust gas are heat exchanged in the regenerator 5. The air heated in the regenerator 5 flows back to the gas turbine 9. Specifically, the power generation device 10 can be a generator. In this embodiment, the exhaust steam generated after the gas turbine 9 burns to generate electricity enters the regenerator 5, which is used to preheat the air compressed by the compressor 11, increase the temperature of the air entering the combustion chamber of the gas turbine 9, and reduce fuel consumption. The gas turbine can be a hydrogen-blended natural gas gas turbine or a pure hydrogen gas turbine. The hydrogen-blended gas turbine can be modified on the basis of the existing natural gas gas turbine to save costs.

[0025] The electrolytic hydrogen production system comprises an electrolyzer 13, a gas-liquid separator 14, a gas cooler 15 and a water mist droplet collector 16 which are sequentially connected by pipelines, the power generation equipment 10 is electrically connected to the electrolyzer 13, and the water mist droplet collector 16 is connected to the gas turbine 9 through the first pipeline 1 to pass hydrogen. The generator is electrically connected to the electrolyzer through electric wires for power supply, and the hydrogen produced by electrolysis in the electrolyzer 13 is separated by gas and liquid in the gas-liquid separator 14, cooled by the gas cooler 15, and filtered by the water mist droplet collector 16, and a part of it is supplied to the gas turbine for combustion, and a part of it is stored for subsequent use.

[0026] The electrolytic hydrogen production system further includes a hydrogen storage tank 17, which is disposed on the pipeline between the water mist droplet collector 16 and the gas turbine 9, and is connected to the gas turbine 9 through the first pipeline 1. Since the power generation of the renewable energy system fluctuates greatly, when the hydrogen production is large, the hydrogen is stored in the hydrogen storage tank for buffering, and then supplied to the gas turbine through the hydrogen storage tank, which can improve the stability of the hydrogen supply to the gas turbine and avoid the waste of hydrogen energy.

[0027] The electrolytic hydrogen production system further includes an electrolyte heat exchanger 18, and the electrolyte heat exchanger 18, the electrolytic cell 13 and the gas-liquid separator 14 are sequentially connected end to end through pipelines to form a circulation loop. The electrolyte heat exchanger 18 is provided to cool the electrolyte separated by the gas-liquid separator and then flow back into the electrolytic cell for recycling, so as to realize the recycling of circulating water in the electrolytic hydrogen production system.

[0028] The electrolytic hydrogen production system further includes a water replenishment system 19, which is connected to the electrolyzer 13 through a pipeline, and the water production heat exchanger 8 is connected to the water replenishment system 19 through the third pipeline 3 to allow pure water to flow in. The pure water produced in the water production heat exchanger 8 is passed into the water replenishment system 19 for storage. The water replenishment system 19 mainly supplies pure water to the electrolyzer 13 to achieve sustainable electrolysis of water in the electrolyzer. Specifically, the water replenishment system 19 can be a set of devices composed of a pure water tank, a pure water pump, etc., which replenish the raw water consumed by the electrolyzer.

[0029] An electrolysis hydrogen production coupled gas turbine power generation system also includes a power grid system 20, and the power generation equipment 10 and the electrolyzer 13 are respectively electrically connected to the power grid system 20. The power grid system 20 can store the renewable energy power generation and the electric energy generated by the power generation equipment, and can also reversely supply power to the electrolyzer and the power generation equipment to maintain the normal operation of the system.

[0030] The input end of the power grid system 20 is also provided with an inverter 21 to ensure that the power generation of renewable energy and power generation equipment can be smoothly connected to the grid.

[0031] The electrolytic cell 13, the power generation equipment 10 and the power grid system 20 are respectively electrically connected to the renewable energy power generation system 4. The system mainly uses renewable energy to power the electrolytic cell and the power generation equipment, and the power grid system serves as a backup power source and can be used to consume the electricity generated by renewable energy.

[0032] It should be noted that, in the description of this application, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" is two or more.

[0033] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0034] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0035] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An electrolysis hydrogen production coupled with a gas turbine power generation system, characterized in that: It includes an electrolytic hydrogen production system, a gas turbine power generation system and a waste heat utilization system, wherein the gas turbine power generation system is used to supply power to the electrolytic hydrogen production system, the electrolytic hydrogen production system supplies hydrogen to the gas turbine power generation system through a first pipeline, the gas turbine power generation system is connected to the waste heat utilization system through a second pipeline to introduce exhaust steam, and the waste heat utilization system is connected to the electrolytic hydrogen production system through a third pipeline to supply water, and also includes a renewable energy power generation system, and the renewable energy power generation system is electrically connected to the electrolytic hydrogen production system; The waste heat utilization system comprises a regenerator, a raw water heat exchanger, a membrane distillation assembly and a water production heat exchanger connected in sequence through pipelines, the gas turbine power generation system introduces exhaust gas to the regenerator through the second pipeline, the regenerator introduces low-temperature flue gas to the raw water heat exchanger through a pipeline, the raw water heat exchanger is externally connected to raw water, the raw water and the low-temperature flue gas are heat-exchanged and heated in the regenerator, the raw water heated in the raw water heat exchanger is introduced into the membrane distillation assembly through a pipeline, and the water outlet of the membrane distillation assembly is connected to the water production heat exchanger for introducing pure water; The gas turbine power generation system comprises a gas turbine, a power generation device and a compressor connected in sequence through pipelines, the gas turbine drives the power generation device to generate electricity, the power generation device is electrically connected to the electrolysis hydrogen production system for power supply, the power generation device passes exhaust gas to the regenerator through the second pipeline, the compressor is connected to the regenerator through a fourth pipeline to pass air, the air and the exhaust gas exchange heat in the regenerator, and the air heated in the regenerator flows back to the gas turbine; The electrolytic hydrogen production system comprises an electrolytic cell, a gas-liquid separator, a gas cooler and a water mist droplet collector which are sequentially connected through pipelines, the power generation equipment is electrically connected to the electrolytic cell, and the water mist droplet collector is connected to the gas turbine through the first pipeline to introduce hydrogen; The electrolysis hydrogen production system further includes a hydrogen storage tank, which is arranged on the pipeline between the water mist droplet collector and the gas turbine, and is connected to the gas turbine through the first pipeline; The electrolytic hydrogen production system also includes an electrolyte heat exchanger, and the electrolyte heat exchanger, the electrolytic cell and the gas-liquid separator are sequentially connected end to end through pipelines to form a circulation loop.

2. The electrolysis hydrogen production coupled gas turbine power generation system according to claim 1, characterized in that: The electrolytic hydrogen production system also includes a water replenishment system, which is connected to the electrolytic cell through a pipeline, and the water production heat exchanger is connected to the water replenishment system through the third pipeline to allow pure water to flow into it.

3. The electrolysis hydrogen production coupled gas turbine power generation system according to claim 1, characterized in that: It also includes a power grid system, and the power generation equipment and the electrolyzer are electrically connected to the power grid system respectively.

4. The electrolysis hydrogen production coupled gas turbine power generation system according to claim 3, characterized in that: An inverter is also provided at the input end of the power grid system.

5. The electrolysis hydrogen production coupled with gas turbine power generation system according to claim 3, characterized in that: The electrolyzer, the power generation equipment and the power grid system are electrically connected to the renewable energy power generation system respectively.

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