Multi-energy complementary power generation system based on carbon dioxide Brayton

Abstract

The utility model provides a multi-energy complementary power generation system based on carbon dioxide Brayton, and belongs to the technical field of power generation. The multi-energy complementary power generation system based on carbon dioxide Brayton comprises a thermal power generation system, a carbon dioxide Brayton power generation system, a water electrolysis device, a carbon dioxide collection and storage device and a methane and methanol preparation device. According to the carbon dioxide Brayton multi-energy complementary power generation system, carbon dioxide discharged by the thermal power generation system is input into the carbon dioxide Brayton power generation system, so that the generating capacity is improved; and carbon dioxide discharged by the carbon dioxide Brayton power generation system reacts with hydrogen electrolyzed by the water electrolysis device through the methane and methanol preparation device to generate methane or methanol, so that the utilization rate of carbon dioxide resources is improved, meanwhile, the carbon dioxide is prevented from being directly discharged into air, the pollution to the environment is reduced, and the ecological environment is protected.

Description

Technical Field

[0001] The present application relates to the field of power generation technology, and in particular to a multi-energy complementary power generation system based on carbon dioxide Brayton. Background Art

[0002] Traditional thermal power generation produces waste gas because it uses coal as raw material. The flue gas discharged into the air contains more harmful substances, causing serious flue gas pollution and seriously affecting the environment and health.

[0003] Therefore, it will be treated before being discharged. The flue gas treatment effect in the existing coal-fired power generation system is poor. The existing exhaust gas treatment for thermal power generation usually processes the discharged gas through a gas treatment device, and then directly discharges the carbon dioxide, nitrogen, etc. generated by the gas treatment device into the air.

[0004] The existing carbon dioxide generated by thermal power generation is directly discharged into the air, causing environmental pollution and waste of carbon dioxide resources, and making the power generation of thermal power generation low. Utility Model Content

[0005] The present application provides a multi-energy complementary power generation system based on carbon dioxide Brayton to solve the technical problem that the existing thermal power generation directly discharges carbon dioxide into the air, causing environmental pollution and waste of carbon dioxide resources.

[0006] The present application provides a multi-energy complementary power generation system based on carbon dioxide Brayton, including a thermal power generation system, a carbon dioxide Brayton power generation system, a water electrolysis device, a carbon dioxide collection and storage device, and a methane methanol production device;

[0007] The drainage end of the thermal power generation system is connected to the water electrolysis device, and the water electrolysis device is used to electrolyze the wastewater discharged from the drainage end of the thermal power generation system into hydrogen and oxygen. The exhaust end of the thermal power generation system is connected to the carbon dioxide collection and storage device, and the carbon dioxide collection and storage device is used to collect and store the carbon dioxide discharged from the exhaust end of the thermal power generation system;

[0008] The carbon dioxide input end of the carbon dioxide Brayton power generation system is connected to the carbon dioxide collection and storage device, and the carbon dioxide collection and storage device is used to provide carbon dioxide for the carbon dioxide Brayton power generation system. The carbon dioxide discharge end of the carbon dioxide Brayton power generation system and the hydrogen electrolyzed by the water electrolysis device are respectively connected to the methane methanol production device, and the methane methanol production device is used to react the carbon dioxide discharged from the carbon dioxide discharge end of the carbon dioxide Brayton power generation system with the hydrogen electrolyzed by the water electrolysis device to generate methane or methanol.

[0009] In the preferred technical solution of the multi-energy complementary power generation system based on carbon dioxide Brayton, it also includes a nitrogen collection and storage device, a liquid nitrogen preparation device and a refrigeration device, the input end of the nitrogen collection and storage device is connected to the exhaust end of the thermal power generation system, the nitrogen collection and storage device is used to collect and store the nitrogen discharged from the exhaust end of the thermal power generation system, the output end of the nitrogen collection and storage device is connected to the input end of the liquid nitrogen preparation device, and the liquid nitrogen preparation device is used to prepare the nitrogen input by the nitrogen collection and storage device into liquid nitrogen;

[0010] The refrigeration device has a cold source inlet, a cold source outlet, a refrigeration inlet and a refrigeration outlet. The cold source inlet is connected to the output end of the liquid nitrogen preparation device, the cold source outlet is connected to the nitrogen collection and storage device, the refrigeration inlet is connected to the carbon dioxide discharge end of the carbon dioxide Brayton power generation system, and the refrigeration outlet is respectively connected to the carbon dioxide collection and storage device and the methane methanol preparation device. The refrigeration device is used to cool down the carbon dioxide discharged from the carbon dioxide discharge end of the carbon dioxide Brayton power generation system, so that the cooled carbon dioxide enters the carbon dioxide collection and storage device and the methane methanol preparation device respectively.

[0011] In the preferred technical solution of the multi-energy complementary power generation system based on carbon dioxide Brayton, it also includes a photothermal power generation system and a heat source pool, the photothermal power generation system includes a photothermal collector, a cold salt tank, a conveying device and a hot salt tank, the cold salt outlet of the cold salt tank is connected to the hot salt inlet of the hot salt tank through the conveying device, the conveying device is used to transport the salt in the cold salt tank to the hot salt tank, the photothermal collector is connected to the conveying device, and the photothermal collector is used to heat the salt in the conveying device;

[0012] The heat source pool has a heat source inlet and a heat source outlet. The heat source inlet is connected to the hot salt output port of the hot salt tank, and the heat source outlet is connected to the cold salt inlet of the cold salt tank. The heat source pool is used to provide a heat source for the carbon dioxide Brayton power generation system.

[0013] In the preferred technical solution of the above-mentioned multi-energy complementary power generation system based on carbon dioxide Brayton, the thermal power generation system includes a boiler device, a steam generating device, a steam power generation device and a water cooling device connected in sequence, the boiler device is used to burn fuel, the exhaust end of the boiler device is connected to the carbon dioxide collection and storage device, and the water cooling device is connected to the water electrolysis device.

[0014] In the preferred technical solution of the above-mentioned multi-energy complementary power generation system based on carbon dioxide Brayton, the water supply end of the steam generating device is connected to the water outlet end of the methane methanol production device, and the methane methanol production device is used to provide a water source for the steam generating device.

[0015] In the preferred technical solution of the multi-energy complementary power generation system based on carbon dioxide Brayton, the carbon dioxide Brayton power generation system includes a first carbon dioxide compressor, a first heat exchanger, a second carbon dioxide compressor, a second heat exchanger, a carbon dioxide storage tank, a first regenerator, a second regenerator and a turbine power generation device. The first carbon dioxide compressor, the first heat exchanger, the second carbon dioxide compressor, the second heat exchanger, the carbon dioxide storage tank, the first regenerator, the second regenerator, the heat source pool and the turbine power generation device are connected in sequence, and the heat source pool is respectively connected to the first regenerator and the second regenerator, and the heat source pool is used to provide heat sources for the first regenerator and the second regenerator respectively.

[0016] In the preferred technical solution of the above-mentioned multi-energy complementary power generation system based on carbon dioxide Brayton, the carbon dioxide exhaust end of the turbine power generation device is connected to the first regenerator, the second regenerator and the refrigeration inlet of the refrigeration device in sequence to cool the carbon dioxide discharged from the carbon dioxide exhaust end of the turbine power generation device.

[0017] In the preferred technical solution of the above-mentioned multi-energy complementary power generation system based on carbon dioxide Brayton, the liquid nitrogen preparation device includes a nitrogen compressor, a third heat exchanger, a throttle valve and a liquid nitrogen tank connected in sequence, the nitrogen compressor is connected to the output end of the nitrogen collection and storage device, and the liquid nitrogen tank is connected to the cold source inlet of the refrigeration device.

[0018] In the preferred technical solution of the above-mentioned multi-energy complementary power generation system based on carbon dioxide Brayton, it also includes a photovoltaic power generation system and a wind power generation system, and the photovoltaic power generation system and the wind power generation system are electrically connected to the water electrolysis device respectively, and the photovoltaic power generation system and the wind power generation system are used to provide power for the water electrolysis device.

[0019] In the preferred technical solution of the above-mentioned multi-energy complementary power generation system based on carbon dioxide Brayton, it also includes an ammonia preparation device, and the nitrogen collection and storage device and the hydrogen electrolyzed by the water electrolysis device are respectively connected to the ammonia preparation device, and the ammonia preparation device is used to react the nitrogen in the nitrogen collection and storage device with the hydrogen electrolyzed by the water electrolysis device to generate ammonia.

[0020] The present application provides a multi-energy complementary power generation system based on carbon dioxide Brayton power generation, a multi-energy complementary power generation system based on carbon dioxide Brayton power generation, including a thermal power generation system, a carbon dioxide Brayton power generation system, a water electrolysis device, a carbon dioxide collection and storage device and a methane methanol preparation device. The water discharged by the thermal power generation system is transported to the water electrolysis device, and the water electrolysis device electrolyzes the water into hydrogen and oxygen; the carbon dioxide discharged by the thermal power generation system is collected and stored by the carbon dioxide collection and storage device, and then the carbon dioxide stored in the carbon dioxide collection and storage device is input into the carbon dioxide Brayton power generation system to provide the required carbon dioxide for the carbon dioxide Brayton power generation system. The carbon dioxide will generate electricity after passing through the carbon dioxide Brayton power generation system, and then the carbon dioxide coming out of the carbon dioxide Brayton power generation system is transported to the methane methanol preparation device, and the methane methanol preparation device reacts the carbon dioxide discharged by the carbon dioxide Brayton power generation system with the hydrogen electrolyzed by the water electrolysis device to generate methane or methanol. Since the carbon dioxide emitted by the thermal power generation system in the multi-energy complementary power generation system of the carbon dioxide Brayton of the present application is input into the carbon dioxide Brayton power generation system, the power generation is increased, and the carbon dioxide discharged by the carbon dioxide Brayton power generation system is reacted with hydrogen electrolyzed by a methane methanol preparation device and a water electrolysis device to generate methane or methanol. Methane and methanol can be used as fuel and also have use value in the chemical industry and other fields, thereby improving the utilization rate of carbon dioxide resources and avoiding the waste of carbon dioxide resources. At the same time, it also avoids the direct emission of carbon dioxide into the air, reduces pollution to the environment, and protects the ecological environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0022] Figure 1 A schematic diagram of the structure of a multi-energy complementary power generation system based on carbon dioxide Brayton provided in an embodiment of the present application;

[0023] Figure 2 for Figure 1 Schematic diagram of the structure of the thermal power generation system;

[0024] Figure 3 for Figure 1 Schematic diagram of the structure of the carbon dioxide Brayton power generation system;

[0025] Figure 4 for Figure 1 A schematic diagram of the structure of a liquid nitrogen preparation device;

[0026] Figure 5 for Figure 1 Schematic diagram of the structure of the solar thermal power generation system and heat source pool.

[0027] Description of reference numerals:

[0028] 100- thermal power generation system, 110- boiler device, 120- steam generation device, 130- steam power generation device, 140- water cooling device, 200- carbon dioxide Brayton power generation system, 210- first carbon dioxide compressor, 220- first heat exchanger, 230- second carbon dioxide compressor, 240- second heat exchanger, 250- carbon dioxide storage tank, 260- first regenerator, 270- second regenerator, 280- turbine power generation device, 300- water electrolysis device, 400- carbon dioxide collection and storage device, 500- methane methanol preparation device, 600- nitrogen collection and storage Storage device, 700-liquid nitrogen preparation device, 710-nitrogen compressor, 720-third heat exchanger, 730-throttle valve, 740-liquid nitrogen pool, 800-refrigeration device, 810-cold source inlet, 820-cold source outlet, 830-refrigeration inlet, 840-refrigeration outlet, 900-photothermal power generation system, 910-photothermal collector, 920-cold salt tank, 930-transportation device, 940-hot salt tank, 1000-heat source pool, 1010-heat source inlet, 1020-heat source outlet, 1100-photovoltaic power generation system, 1200-wind power generation system, 1300-ammonia preparation device.

[0029] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0030] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation methods described in the following exemplary embodiments do not represent all implementation methods consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0031] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0034] Traditional thermal power generation uses coal as raw material, which will produce waste gas. The flue gas discharged into the air contains more harmful substances, causing serious flue gas pollution and seriously affecting the environment and health. Therefore, it will be treated before discharge. The flue gas treatment effect of existing coal-fired power generation systems is poor. The existing thermal power generation exhaust treatment usually treats the discharged gas through a gas treatment device, and then directly discharges the carbon dioxide, nitrogen, etc. generated by the gas treatment device into the air.

[0035] The existing carbon dioxide generated by thermal power generation is directly discharged into the air, causing environmental pollution and waste of carbon dioxide resources, and making the power generation of thermal power generation low.

[0036] In order to solve the technical problem that the existing thermal power generation directly discharges carbon dioxide into the air, causing environmental pollution and waste of carbon dioxide resources, the present application proposes a multi-energy complementary power generation system based on carbon dioxide Brayton, including a thermal power generation system, a carbon dioxide Brayton power generation system, a water electrolysis device, a carbon dioxide collection and storage device, and a methane methanol preparation device; the drainage end of the thermal power generation system is connected to the water electrolysis device, and the water electrolysis device is used to electrolyze the wastewater discharged from the drainage end of the thermal power generation system into hydrogen and oxygen, and the exhaust end of the thermal power generation system is connected to the carbon dioxide collection and storage device, and the carbon dioxide collection and storage device is used to collect and store the carbon dioxide discharged from the exhaust end of the thermal power generation system; the carbon dioxide input end of the carbon dioxide Brayton power generation system is connected to the carbon dioxide collection and storage device, and the carbon dioxide collection and storage device is used to provide carbon dioxide for the carbon dioxide Brayton power generation system, and the carbon dioxide discharge end of the carbon dioxide Brayton power generation system and the hydrogen electrolyzed by the water electrolysis device are respectively connected to the methane methanol preparation device, and the methane methanol preparation device is used to react the carbon dioxide discharged from the carbon dioxide discharge end of the carbon dioxide Brayton power generation system with the hydrogen electrolyzed by the water electrolysis device to generate methane or methanol.

[0037] The multi-energy complementary power generation system of the carbon dioxide Brayton power plant of the present application transports the water discharged by the thermal power generation system to a water electrolysis device, and the water electrolysis device electrolyzes the water into hydrogen and oxygen; the carbon dioxide discharged by the thermal power generation system is collected and stored by a carbon dioxide collection and storage device, and then the carbon dioxide stored in the carbon dioxide collection and storage device is input into the carbon dioxide Brayton power generation system to provide the required carbon dioxide for the carbon dioxide Brayton power generation system, and the carbon dioxide will generate electricity after passing through the carbon dioxide Brayton power generation system, and then the carbon dioxide coming out of the carbon dioxide Brayton power generation system is transported to a methane methanol preparation device, and the methane methanol preparation device reacts the carbon dioxide discharged by the carbon dioxide Brayton power generation system with the hydrogen electrolyzed by the water electrolysis device to generate methane or methanol.

[0038] Since the carbon dioxide emitted by the thermal power generation system in the multi-energy complementary power generation system of the carbon dioxide Brayton of the present application is input into the carbon dioxide Brayton power generation system, the power generation is increased, and the carbon dioxide discharged by the carbon dioxide Brayton power generation system is reacted with hydrogen electrolyzed by a methane methanol preparation device and a water electrolysis device to generate methane or methanol. Methane and methanol can be used as fuel and also have use value in the chemical industry and other fields, thereby improving the utilization rate of carbon dioxide resources and avoiding the waste of carbon dioxide resources. At the same time, it also avoids the direct emission of carbon dioxide into the air, reduces pollution to the environment, and protects the ecological environment.

[0039] The following specific embodiments are combined with the accompanying drawings to describe the technical solution of the application in detail. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0040] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, Figure 1 A schematic diagram of the structure of a multi-energy complementary power generation system based on carbon dioxide Brayton provided in an embodiment of the present application; Figure 2 for Figure 1 Schematic diagram of the structure of the thermal power generation system; Figure 3 for Figure 1 Schematic diagram of the structure of the carbon dioxide Brayton power generation system; Figure 4 for Figure 1 A schematic diagram of the structure of a liquid nitrogen preparation device; Figure 5 for Figure 1 Schematic diagram of the structure of the solar thermal power generation system and heat source pool.

[0041] In the embodiments of this application, refer to Figures 1 to 4 As shown, an embodiment of the present application provides a multi-energy complementary power generation system based on carbon dioxide Brayton, including a thermal power generation system 100, a carbon dioxide Brayton power generation system 200, a water electrolysis device 300, a carbon dioxide collection and storage device 400 and a methane methanol production device 500.

[0042] The drainage end of the thermal power generation system 100 is connected to the water electrolysis device 300, which is used to electrolyze the wastewater discharged from the drainage end of the thermal power generation system 100 into hydrogen and oxygen. The exhaust end of the thermal power generation system 100 is connected to the carbon dioxide collection and storage device 400, which is used to collect and store carbon dioxide discharged from the exhaust end of the thermal power generation system 100.

[0043] The carbon dioxide input end of the carbon dioxide Brayton power generation system 200 is connected to the carbon dioxide collection and storage device 400, and the carbon dioxide collection and storage device 400 is used to provide carbon dioxide for the carbon dioxide Brayton power generation system 200. The carbon dioxide discharge end of the carbon dioxide Brayton power generation system 200 and the hydrogen electrolyzed by the water electrolysis device 300 are respectively connected to the methane methanol production device 500, and the methane methanol production device 500 is used to react the carbon dioxide discharged from the carbon dioxide discharge end of the carbon dioxide Brayton power generation system 200 with the hydrogen electrolyzed by the water electrolysis device 300 to generate methane or methanol.

[0044] The thermal power generation system 100 of the embodiment of the present application may be an existing thermal power generation system 100, which burns coal in a boiler and generates electricity through a steam power generation component. The steam power generation component generates water after generating electricity. In this embodiment, the generated water is transported to a water electrolysis device 300, and the water is electrolyzed into hydrogen and oxygen through the water electrolysis device 300.

[0045] Boiler combustion will produce waste gas, which can produce carbon dioxide, nitrogen and other gases through a gas treatment device. The carbon dioxide collection and storage device 400 is specifically used to collect carbon dioxide gas and store the collected carbon dioxide.

[0046] The carbon dioxide collection and storage device 400 transports the stored carbon dioxide to the carbon dioxide Brayton power generation system 200. In the present embodiment, the carbon dioxide Brayton power generation system 200 may be an existing carbon dioxide Brayton power generation system 200 structure. The carbon dioxide collection and storage device 400 provides the required carbon dioxide to the carbon dioxide Brayton power generation system 200, so that the carbon dioxide Brayton power generation system 200 can generate electricity, thereby improving the power generation of the multi-energy complementary power generation system based on carbon dioxide Brayton in the present application.

[0047] Carbon dioxide enters the carbon dioxide Brayton power generation system 200 from the carbon dioxide input end of the carbon dioxide Brayton power generation system 200, and after power generation, it is discharged from the carbon dioxide discharge end of the carbon dioxide Brayton power generation system 200. The discharged carbon dioxide is input to the methane methanol production device 500.

[0048] The methane methanol production device 500 can be composed of an existing methane production device and a methanol production device. The methane production device can produce methane from hydrogen and carbon dioxide, and the methanol production device can produce methanol from hydrogen and carbon dioxide. Both the methane production device and the methanol production device are existing known technologies and will not be described in detail here.

[0049] The multi-energy complementary power generation system of the carbon dioxide Brayton power generation system of the present application transports the water discharged by the thermal power generation system 100 to the water electrolysis device 300, and the water electrolysis device 300 electrolyzes the water into hydrogen and oxygen; the carbon dioxide discharged by the thermal power generation system 100 is collected and stored by the carbon dioxide collection and storage device 400, and then the carbon dioxide stored in the carbon dioxide collection and storage device 400 is input into the carbon dioxide Brayton power generation system 200 to provide the required carbon dioxide for the carbon dioxide Brayton power generation system 200, and the carbon dioxide will generate electricity after passing through the carbon dioxide Brayton power generation system 200, and then the carbon dioxide coming out of the carbon dioxide Brayton power generation system 200 is transported to the methane methanol preparation device 500, and the methane methanol preparation device 500 reacts the carbon dioxide discharged by the carbon dioxide Brayton power generation system 200 with the hydrogen electrolyzed by the water electrolysis device 300 to generate methane or methanol.

[0050] Since the carbon dioxide emitted by the thermal power generation system 100 in the multi-energy complementary power generation system of the carbon dioxide Brayton of the present application is input into the carbon dioxide Brayton power generation system 200, the power generation is increased, and the carbon dioxide discharged by the carbon dioxide Brayton power generation system 200 is reacted with the hydrogen electrolyzed by the methane methanol preparation device 500 and the water electrolysis device 300 to generate methane or methanol. Methane and methanol can be used as fuel and also have use value in the chemical industry and other fields, thereby improving the utilization rate of carbon dioxide resources and avoiding the waste of carbon dioxide resources. At the same time, it also avoids the direct emission of carbon dioxide into the air, reduces pollution to the environment, and protects the ecological environment.

[0051] In other embodiments, the multi-energy complementary power generation system based on carbon dioxide Brayton reactor of the present application also includes a nitrogen collection and storage device 600, a liquid nitrogen preparation device 700 and a refrigeration device 800. The input end of the nitrogen collection and storage device 600 is connected to the exhaust end of the thermal power generation system 100. The nitrogen collection and storage device 600 is used to collect and store nitrogen discharged from the exhaust end of the thermal power generation system 100. The output end of the nitrogen collection and storage device 600 is connected to the input end of the liquid nitrogen preparation device 700. The liquid nitrogen preparation device 700 is used to prepare the nitrogen input into the nitrogen collection and storage device 600 into liquid nitrogen.

[0052] The refrigeration device 800 has a cold source inlet 810, a cold source outlet 820, a refrigeration inlet 830 and a refrigeration outlet 840. The cold source inlet 810 is connected to the output end of the liquid nitrogen preparation device 700, the cold source outlet 820 is connected to the nitrogen collection and storage device 600, the refrigeration inlet 830 is connected to the carbon dioxide discharge end of the carbon dioxide Brayton power generation system 200, and the refrigeration outlet 840 is respectively connected to the carbon dioxide collection and storage device 400 and the methane methanol preparation device 500. The refrigeration device 800 is used to cool the carbon dioxide discharged from the carbon dioxide discharge end of the carbon dioxide Brayton power generation system 200, so that the cooled carbon dioxide enters the carbon dioxide collection and storage device 400 and the methane methanol preparation device 500 respectively.

[0053] In this embodiment, the nitrogen collection and storage device 600 collects and stores the nitrogen generated by the gas processing device in the thermal power generation system 100. The nitrogen stored in the nitrogen collection and storage device 600 is prepared into liquid nitrogen by the liquid nitrogen preparation device 700. The liquid nitrogen is input into the refrigeration device 800 as a refrigerant, so that the refrigeration device 800 can refrigerate. The refrigeration device 800 can be a heat exchanger, a refrigerator, a precooler, etc. In this embodiment, the refrigeration device 800 cools the carbon dioxide discharged from the carbon dioxide discharge end of the carbon dioxide Brayton power generation system 200, and the cooled carbon dioxide is input into the carbon dioxide collection and storage device 400 and the methane methanol preparation device 500. Since the carbon dioxide input into the carbon dioxide collection and storage device 400 is cooled, the carbon dioxide transported to the carbon dioxide Brayton power generation system 200 is in a low temperature state, thereby improving the compression efficiency of the carbon dioxide compressor in the carbon dioxide Brayton power generation system 200, and then improving the power generation efficiency of the entire carbon dioxide Brayton power generation system 200.

[0054] Furthermore, since the carbon dioxide input into the methane methanol production device 500 is cooled, it can prevent the high-temperature internal carbon dioxide from entering the methane methanol production device 500 and causing safety accidents, thereby improving the safety performance of the methane methanol production device 500.

[0055] In one embodiment, referring to Figure 5 As shown, the multi-energy complementary power generation system based on carbon dioxide Brayton reactor of the present application also includes a solar thermal power generation system 900 and a heat source pool 1000. The solar thermal power generation system 900 includes a solar thermal collector 910, a cold salt tank 920, a conveying device 930 and a hot salt tank 940. The cold salt outlet of the cold salt tank 920 is connected to the hot salt inlet of the hot salt tank 940 through the conveying device 930. The conveying device 930 is used to transport the salt in the cold salt tank 920 to the hot salt tank 940. The solar thermal collector 910 is connected to the conveying device 930, and the solar thermal collector 910 is used to heat the salt in the conveying device 930.

[0056] The heat source pool 1000 has a heat source inlet 1010 and a heat source outlet 1020. The heat source inlet 1010 is connected to the hot salt output port of the hot salt tank 940, and the heat source outlet 1020 is connected to the cold salt inlet of the cold salt tank 920. The heat source pool 1000 is used to provide a heat source for the carbon dioxide Brayton power generation system 200.

[0057] In this embodiment, the solar thermal collector 910 of the solar thermal power generation system 900 may include a heliostat and a collector. The heliostat transports the sun's thermal energy to the collector, and the collector absorbs the sun's thermal energy, so that the solar thermal collector 910 can heat the cold salt in the cold salt tank 920. The heated hot salt is stored in the hot salt tank 940, and the hot salt in the hot salt tank 940 is transported to the heat source pool 1000. The hot salt provides a heat source for the heat source pool 1000. The heat source pool 1000 is used to provide a heat source for the carbon dioxide Brayton power generation system 200, so that the carbon dioxide Brayton power generation system 200 can generate electricity. Since the heat source of the carbon dioxide Brayton power generation system 200 in this embodiment is provided by the solar thermal power generation system 900 and the heat source pool 1000, the consumption of coal is reduced, the pollution to the environment is reduced, and the power generation is increased.

[0058] In other embodiments, reference Figure 2 As shown, the thermal power generation system 100 includes a boiler device 110, a steam generating device 120, a steam generating device 130 and a water cooling device 140 which are connected in sequence. The boiler device 110 is used to burn fuel. The exhaust end of the boiler device 110 is connected to a carbon dioxide collection and storage device 400. The water cooling device 140 is connected to a water electrolysis device 300.

[0059] In this embodiment, the boiler device 110 can be used to burn coal, and the water cooling device 140 cools the water and water vapor passing through the power generation system into liquid water, and then transports it to the water electrolysis device 300 for electrolysis.

[0060] In some possible embodiments, the water supply end of the steam generating device 120 is connected to the water outlet end of the methane methanol production device 500 , and the methane methanol production device 500 is used to provide a water source for the steam generating device 120 .

[0061] In this embodiment, since the methane methanol production device 500 may produce water when producing methane or methanol through hydrogen and carbon dioxide, this embodiment transports the produced water to the steam generating device 120, thereby improving the utilization rate of water and reducing the water consumption of the thermal power generation system 100.

[0062] In another possible embodiment, referring to Figure 3As shown, the carbon dioxide Brayton power generation system 200 includes a first carbon dioxide compressor 210, a first heat exchanger 220, a second carbon dioxide compressor 230, a second heat exchanger 240, a carbon dioxide storage tank 250, a first heat regenerator 260, a second heat regenerator 270 and a turbine power generation device 280. The first carbon dioxide compressor 210, the first heat exchanger 220, the second carbon dioxide compressor 230, the second heat exchanger 240, the carbon dioxide storage tank 250, the first heat regenerator 260, the second heat regenerator 270, the heat source pool 1000 and the turbine power generation device 280 are connected in sequence, and the heat source pool 1000 is connected to the first heat regenerator 260 and the second heat regenerator 270 respectively. The heat source pool 1000 is used to provide heat sources for the first heat regenerator 260 and the second heat regenerator 270 respectively.

[0063] In this embodiment, after the carbon dioxide enters the carbon dioxide Brayton power generation system 200, it is compressed by the first carbon dioxide compressor 210, then cooled by the first heat exchanger 220, then compressed again by the second carbon dioxide compressor 230, then cooled by the second heat exchanger 240, and then stored in the carbon dioxide storage tank 250. The carbon dioxide stored in the carbon dioxide storage tank 250 is reheated by the first reheater 260 and the second reheater 270 in turn, and then heated by the heat source pool 1000, and finally enters the turbine power generation device 280. The turbine power generation device 280 includes a turbine and a generator. The heated carbon dioxide enters the turbine, so that the turbine works on the generator to generate electricity.

[0064] In addition, the heat sources of the first regenerator 260 and the second regenerator 270 are both from the heat source pool 1000, thereby reducing the power generation cost of the carbon dioxide Brayton power generation system 200 and providing a solution for the cross-integration of thermal power and new energy.

[0065] In other possible embodiments, the carbon dioxide exhaust end of the turbine power generation device 280 is connected to the first reheater 260, the second reheater 270 and the refrigeration inlet 830 of the refrigeration device 800 in sequence to cool the carbon dioxide exhausted from the carbon dioxide exhaust end of the turbine power generation device 280.

[0066] In this embodiment, the carbon dioxide discharged from the carbon dioxide exhaust end of the turbine power generation device 280 is cooled in sequence through the first reheater 260, the second reheater 270 and the refrigeration device 800 to ensure that the temperature of the carbon dioxide input into the carbon dioxide collection and storage device 400 and the methane methanol production device 500 is within a preset range.

[0067] In another possible embodiment, referring to Figure 4As shown, the liquid nitrogen preparation device 700 includes a nitrogen compressor 710, a third heat exchanger 720, a throttle valve 730 and a liquid nitrogen tank 740 which are connected in sequence. The nitrogen compressor 710 is connected to the output end of the nitrogen collection and storage device 600, and the liquid nitrogen tank 740 is connected to the cold source inlet 810 of the refrigeration device 800.

[0068] In this embodiment, nitrogen is input into the nitrogen compressor 710 for compression, then cooled by the third heat exchanger 720 , and then compressed again by the throttle valve 730 , and finally forms liquid nitrogen in the liquid nitrogen pool 740 .

[0069] In some possible embodiments, a photovoltaic power generation system 1100 and a wind power generation system 1200 are also included. The photovoltaic power generation system 1100 and the wind power generation system 1200 are electrically connected to the water electrolysis device 300 respectively, and the photovoltaic power generation system 1100 and the wind power generation system 1200 are used to provide power for the water electrolysis device 300.

[0070] In this embodiment, the photovoltaic power generation system 1100 and the wind power generation system 1200 are used to provide power for the water electrolysis device 300, thereby avoiding the need to draw power from the thermal power generation system 100, eliminating the power consumption of the thermal power generation system 100, and reducing the demand for coal mines. Complementary power generation is formed among the thermal power generation system 100, the carbon dioxide Brayton power generation system 200, the photovoltaic power generation system 1100, and the wind power generation system 1200, thereby reducing the consumption of coal mines and reducing pollution to the environment as a whole.

[0071] In other possible embodiments, an ammonia preparation device 1300 is further included. The nitrogen collection and storage device 600 and the hydrogen electrolyzed by the water electrolysis device 300 are respectively connected to the ammonia preparation device 1300. The ammonia preparation device 1300 is used to react the nitrogen in the nitrogen collection and storage device 600 with the hydrogen electrolyzed by the water electrolysis device 300 to generate ammonia.

[0072] In this embodiment, part of the ammonia generated by the nitrogen collection and storage device 600 can be used. The nitrogen can be directly used for commercial purposes. The ammonia generated by nitrogen and hydrogen can be directly used for commercial purposes. The generated ammonium bicarbonate can be used as fertilizer, further improving the utilization rate of the gas resources emitted by the thermal power generation system 100.

[0073] In summary, the multi-energy complementary power generation system based on carbon dioxide Brayton in the present application combines the thermal power generation system 100, the carbon dioxide Brayton power generation system 200, the solar thermal power generation system 900, the photovoltaic power generation system 1100 and the wind power generation system 1200 to form complementary power generation, improve the utilization rate of carbon dioxide resources and nitrogen, avoid the waste of carbon dioxide and nitrogen resources, and also avoid the direct emission of carbon dioxide into the air, reduce the pollution to the environment, and protect the ecological environment. Due to the formation of complementary power generation, the operation and maintenance cost of the entire system is reduced. In addition, the present application uses carbon dioxide as a medium, which has a large density. Power generation under high temperature and high pressure can effectively reduce the volume of the generator set and improve the conversion efficiency of power generation. Therefore, the present application realizes the organic combination of traditional power stations and new energy power stations, improves the power generation efficiency and reduces the power generation cost while carrying out carbon dioxide treatment. The present application provides a solution for the cross-integration of thermal power and new energy at present, effectively combines thermal power generation and new energy power generation, improves the energy conversion rate, and reduces the construction and operation costs.

[0074] Those skilled in the art will readily appreciate other embodiments of the present application after considering the description and practicing the contents disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The description and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0075] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A multi-energy complementary power generation system based on carbon dioxide Brayton, characterized in that: It comprises a thermal power generation system (100), a carbon dioxide Brayton power generation system (200), a water electrolysis device (300), a carbon dioxide collection and storage device (400) and a methane methanol production device (500); The drainage end of the thermal power generation system (100) is connected to the water electrolysis device (300), and the water electrolysis device (300) is used to electrolyze the wastewater discharged from the drainage end of the thermal power generation system (100) into hydrogen and oxygen. The exhaust end of the thermal power generation system (100) is connected to the carbon dioxide collection and storage device (400), and the carbon dioxide collection and storage device (400) is used to collect and store carbon dioxide discharged from the exhaust end of the thermal power generation system (100); The carbon dioxide input end of the carbon dioxide Brayton power generation system (200) is connected to the carbon dioxide collection and storage device (400), and the carbon dioxide collection and storage device (400) is used to provide carbon dioxide for the carbon dioxide Brayton power generation system (200). The carbon dioxide discharge end of the carbon dioxide Brayton power generation system (200) and the hydrogen electrolyzed by the water electrolysis device (300) are respectively connected to the methane methanol production device (500), and the methane methanol production device (500) is used to react the carbon dioxide discharged from the carbon dioxide discharge end of the carbon dioxide Brayton power generation system (200) with the hydrogen electrolyzed by the water electrolysis device (300) to generate methane or methanol.

2. The multi-energy complementary power generation system based on carbon dioxide Brayton according to claim 1 is characterized in that: It also comprises a nitrogen collecting and storing device (600), a liquid nitrogen preparing device (700) and a refrigeration device (800), wherein the input end of the nitrogen collecting and storing device (600) is connected to the exhaust end of the thermal power generation system (100), and the nitrogen collecting and storing device (600) is used to collect and store nitrogen discharged from the exhaust end of the thermal power generation system (100); the output end of the nitrogen collecting and storing device (600) is connected to the input end of the liquid nitrogen preparing device (700), and the liquid nitrogen preparing device (700) is used to prepare liquid nitrogen from the nitrogen input to the nitrogen collecting and storing device (600); The refrigeration device (800) comprises a cold source inlet (810), a cold source outlet (820), a refrigeration inlet (830) and a refrigeration outlet (840); the cold source inlet (810) is connected to the output end of the liquid nitrogen preparation device (700); the cold source outlet (820) is connected to the nitrogen collection and storage device (600); the refrigeration inlet (830) is connected to the carbon dioxide discharge end of the carbon dioxide Brayton power generation system (200); the refrigeration outlet (840) is respectively connected to the carbon dioxide collection and storage device (400) and the methane methanol preparation device (500); the refrigeration device (800) is used to cool down the carbon dioxide discharged from the carbon dioxide discharge end of the carbon dioxide Brayton power generation system (200), so that the cooled carbon dioxide enters the carbon dioxide collection and storage device (400) and the methane methanol preparation device (500) respectively.

3. The multi-energy complementary power generation system based on carbon dioxide Brayton according to claim 2 is characterized in that: It also includes a solar thermal power generation system (900) and a heat source pool (1000), wherein the solar thermal power generation system (900) includes a solar thermal collector (910), a cold salt tank (920), a conveying device (930) and a hot salt tank (940), wherein the cold salt outlet of the cold salt tank (920) is connected to the hot salt inlet of the hot salt tank (940) through the conveying device (930), and the conveying device (930) is used to convey the salt in the cold salt tank (920) to the hot salt tank (940), and the solar thermal collector (910) is connected to the conveying device (930), and the solar thermal collector (910) is used to heat the salt in the conveying device (930); The heat source pool (1000) has a heat source inlet (1010) and a heat source outlet (1020), wherein the heat source inlet (1010) is connected to the hot salt output port of the hot salt tank (940), and the heat source outlet (1020) is connected to the cold salt inlet of the cold salt tank (920). The heat source pool (1000) is used to provide a heat source for the carbon dioxide Brayton power generation system (200).

4. The multi-energy complementary power generation system based on carbon dioxide Brayton according to claim 3 is characterized in that: The thermal power generation system (100) comprises a boiler device (110), a steam generating device (120), a steam generating device (130) and a water cooling device (140) which are connected in sequence, wherein the boiler device (110) is used to burn fuel, an exhaust end of the boiler device (110) is connected to the carbon dioxide collecting and storing device (400), and the water cooling device (140) is connected to the water electrolysis device (300).

5. The multi-energy complementary power generation system based on carbon dioxide Brayton according to claim 4 is characterized in that: The water supply end of the steam generating device (120) is connected to the water outlet end of the methane methanol producing device (500), and the methane methanol producing device (500) is used to provide a water source for the steam generating device (120).

6. The multi-energy complementary power generation system based on carbon dioxide Brayton according to claim 3 is characterized in that: The carbon dioxide Brayton power generation system (200) comprises a first carbon dioxide compressor (210), a first heat exchanger (220), a second carbon dioxide compressor (230), a second heat exchanger (240), a carbon dioxide storage tank (250), a first heat regenerator (260), a second heat regenerator (270) and a turbine power generation device (280). The first carbon dioxide compressor (210), the first heat exchanger (220), the second carbon dioxide compressor (230), the second heat exchanger (240), the carbon dioxide storage tank (250), the first heat regenerator (260), the second heat regenerator (270), the heat source tank (1000) and the turbine power generation device (280) are connected in sequence, and the heat source tank (1000) is connected to the first heat regenerator (260) and the second heat regenerator (270) respectively. The heat source tank (1000) is used to provide heat sources for the first heat regenerator (260) and the second heat regenerator (270) respectively.

7. The multi-energy complementary power generation system based on carbon dioxide Brayton according to claim 6 is characterized in that: The carbon dioxide exhaust end of the turbine power generation device (280) is connected to the first heat exchanger (260), the second heat exchanger (270) and the refrigeration inlet (830) of the refrigeration device (800) in sequence to cool the carbon dioxide exhausted from the carbon dioxide exhaust end of the turbine power generation device (280).

8. The multi-energy complementary power generation system based on carbon dioxide Brayton according to claim 7 is characterized in that: The liquid nitrogen preparation device (700) comprises a nitrogen compressor (710), a third heat exchanger (720), a throttle valve (730) and a liquid nitrogen pool (740) which are connected in sequence, the nitrogen compressor (710) is connected to the output end of the nitrogen collection and storage device (600), and the liquid nitrogen pool (740) is connected to the cold source inlet (810) of the refrigeration device (800).

9. The multi-energy complementary power generation system based on carbon dioxide Brayton as claimed in any one of claims 1 to 8, characterized in that: It also includes a photovoltaic power generation system (1100) and a wind power generation system (1200), wherein the photovoltaic power generation system (1100) and the wind power generation system (1200) are electrically connected to the water electrolysis device (300) respectively, and the photovoltaic power generation system (1100) and the wind power generation system (1200) are used to provide power for the water electrolysis device (300).

10. The multi-energy complementary power generation system based on carbon dioxide Brayton as claimed in any one of claims 2 to 8, characterized in that: The invention also comprises an ammonia preparation device (1300), wherein the nitrogen collection and storage device (600) and the hydrogen electrolyzed by the water electrolysis device (300) are respectively connected to the ammonia preparation device (1300), and the ammonia preparation device (1300) is used for reacting the nitrogen in the nitrogen collection and storage device (600) with the hydrogen electrolyzed by the water electrolysis device (300) to generate ammonia.

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