Cyclic power generation system

Abstract

The invention relates to a cyclic power generation system. The circulating power generation system comprises a first combustion chamber, a first turbine, a second combustion chamber, a second turbine, a condenser, a first pump, a plurality of first heat regenerators and a plurality of second heat regenerators. An air outlet of the first combustion chamber communicates with an air inlet of the first turbine, and an air outlet of the first turbine communicates with an air inlet of the second combustion chamber. The second turbine can receive gas flowing out of a gas outlet of the second combustion chamber, and a gas outlet of the second turbine communicates with a gas inlet of the condenser. A water outlet of the condenser sequentially communicates with the liquid inlet ends of the first heat exchange channels of the multiple first heat regenerators through a first pump. The third heat exchange channels of the multiple second heat regenerators sequentially communicate with the air inlet of the first combustion chamber and are used for receiving liquid flowing out of the first heat exchange channels of the multiple first heat regenerators. And heat generated by hydrogen combustion can be efficiently utilized.

Description

Technical Field

[0001] The present application relates to the technical field of hydrogen energy utilization, and in particular to a circulating power generation system. Background Art

[0002] In the related art, hydrogen internal combustion engines are often used in the field of hydrogen energy utilization based on heat-to-power conversion. However, hydrogen internal combustion engines have low efficiency. Summary of the Invention

[0003] Based on this, it is necessary to provide a circulating power generation system to address the above technical problems, which can realize efficient utilization of the heat generated by hydrogen combustion.

[0004] The present application provides a cyclic power generation system, comprising:

[0005] a first combustion chamber having an air inlet and an air outlet, wherein the air inlet of the first combustion chamber is used to be connected to a first oxygen source and a first hydrogen source respectively;

[0006] a first turbine having an air inlet, an air extraction port, and an air outlet; the air outlet of the first combustion chamber is connected to the air inlet of the first turbine;

[0007] a second combustion chamber having an air inlet and an air outlet, wherein the air outlet of the first turbine is connected to the air inlet of the second combustion chamber; and the air inlet of the second combustion chamber is connected to a second oxygen source and a second hydrogen source, respectively;

[0008] a second turbine having an air inlet, an air extraction port, and an air outlet; the second turbine being capable of receiving the gas flowing out of the air outlet of the second combustion chamber;

[0009] a condenser having an air inlet and a water outlet, wherein the air outlet of the second turbine is connected to the air inlet of the condenser;

[0010] a first pump and a plurality of first regenerators, wherein the first regenerators have a first heat exchange channel and a second heat exchange channel for exchanging heat with the first heat exchange channel; the water outlet of the condenser is sequentially connected to the liquid inlet ends of the first heat exchange channels of the plurality of first regenerators through the first pump; the second heat exchange channels of the plurality of first regenerators are all connected to the exhaust port of the second turbine; and of two adjacent first regenerators, the air outlet end of the second heat exchange channel of one of the first regenerators is connected to the air inlet end of the second heat exchange channel of the other first regenerator; and

[0011] Multiple second heat exchangers each have a third heat exchange channel and a fourth heat exchange channel for exchanging heat with the third heat exchange channel; the third heat exchange channels of the multiple second heat exchangers are connected to the air inlet of the first combustion chamber in sequence, and are used to receive the liquid flowing out of the first heat exchange channels of the multiple first heat exchangers; the fourth heat exchange channels of the multiple second heat exchangers are connected to the air outlet or exhaust port of the first turbine; among two adjacent second heat exchangers, the air outlet end of the fourth heat exchange channel of one of the second heat exchangers is connected to the air inlet end of the fourth heat exchange channel of the other second heat exchanger.

[0012] In one embodiment, the cycle power generation system further comprises:

[0013] a deaerator having a liquid inlet and a liquid outlet, wherein the liquid inlet of the deaerator is sequentially connected to the liquid outlet ends of the first heat exchange channels of the plurality of first regenerators; and

[0014] a second pump, wherein the deaerator supplies the liquid flowing out of the liquid outlet of the deaerator to the third heat exchange channels of the plurality of second regenerators through the second pump;

[0015] In one embodiment, the cycle power generation system further comprises:

[0016] a third turbine having an air inlet, an air extraction port, and an air outlet, wherein the air inlet of the third turbine is connected to the air outlet of the second combustion chamber, and the air outlet of the third turbine is connected to the air inlet of the second turbine; and

[0017] a third heat exchanger; having a fifth heat exchange channel and a sixth heat exchange channel for exchanging heat with the fifth heat exchange channel; the liquid inlet end of the fifth heat exchange channel of the third heat exchanger is connected to the liquid outlet end of the second pump, and the liquid outlet end of the fifth heat exchange channel of the third heat exchanger is connected to the third heat exchange channel of an adjacent second heat exchanger; the sixth heat exchange channel of the third heat exchanger is connected to the exhaust port of the third turbine.

[0018] In one embodiment, the cycle power generation system further comprises a steam turbine connected to the second pump, wherein the steam turbine has an air inlet;

[0019] An air outlet of the third turbine is connected to an air inlet of the steam turbine so as to drive the second pump by means of the steam turbine.

[0020] In one embodiment, the number of the first regenerators is at least three.

[0021] In one embodiment, the number of the second regenerators is at least two.

[0022] In one embodiment, the cycle power generation system further includes a fourth regenerator and a fifth regenerator further away from the first combustion chamber than the fourth regenerator;

[0023] The fourth regenerator has a seventh heat exchange channel and an eighth heat exchange channel for exchanging heat with the seventh heat exchange channel;

[0024] The fifth regenerator has a ninth heat exchange channel and a tenth heat exchange channel for exchanging heat with the ninth heat exchange channel;

[0025] The seventh heat exchange channel of the fourth regenerator and the ninth heat exchange channel of the fifth regenerator are connected between the air inlet of the first combustion chamber and the third heat exchange channel of the second regenerator;

[0026] The eighth heat exchange channel of the fourth regenerator and the tenth heat exchange channel of the fifth regenerator are both connected to the exhaust port of the first turbine.

[0027] In one embodiment, the cycle power generation system further includes a sixth regenerator, a seventh regenerator and a first compressor;

[0028] The sixth regenerator has an eleventh heat exchange channel and a twelfth heat exchange channel for exchanging heat with the eleventh heat exchange channel;

[0029] The seventh regenerator has a thirteenth heat exchange channel and a fourteenth heat exchange channel for exchanging heat with the thirteenth heat exchange channel;

[0030] The eleventh heat exchange channel of the sixth regenerator and the thirteenth heat exchange channel of the seventh regenerator are sequentially connected, and are connected between the ninth heat exchange channel of the fifth regenerator and the third heat exchange channel of the adjacent second regenerator;

[0031] The air outlet end of the tenth heat exchange channel of the fifth regenerator is connected to the air inlet end of the twelfth heat exchange channel of the sixth regenerator, the air outlet end of the twelfth heat exchange channel of the sixth regenerator is connected to the air inlet end of the first compressor, and the air outlet end of the first compressor and the air outlet end of the eleventh heat exchange channel of the sixth regenerator are connected in parallel to the ninth heat exchange channel of the fifth regenerator.

[0032] In one embodiment, the cycle power generation system further includes a second compressor;

[0033] The air outlet end of the twelfth heat exchange channel of the sixth regenerator is also connected to the air inlet end of the fourteenth heat exchange channel of the seventh regenerator, the air outlet end of the fourteenth heat exchange channel of the seventh regenerator is connected to the air inlet end of the second compressor, and the air outlet end of the second compressor and the air outlet end of the thirteenth heat exchange channel of the seventh regenerator are connected in parallel to the eleventh heat exchange channel of the sixth regenerator.

[0034] In one embodiment, the cycle power generation system further includes an eighth regenerator;

[0035] The eighth regenerator has a fifteenth heat exchange channel and a sixteenth heat exchange channel for exchanging heat with the fifteenth heat exchange channel;

[0036] The fifteenth heat exchange channel of the eighth regenerator is connected between the air outlet of the first turbine and the air inlet of the second combustion chamber;

[0037] The air outlet end of the eighth heat exchange channel of the fourth regenerator is connected to the air inlet end of the sixteenth heat exchange channel of the eighth regenerator, and the air outlet end of the sixteenth heat exchange channel of the eighth regenerator is connected to the air inlet end of the second compressor.

[0038] In the technical solution of the present application, the water condensed by the condenser can be pumped to the first heat exchange channels of the plurality of first heat regenerators in sequence by a first pump. During this process, the high-temperature steam flowing out of the exhaust port of the second turbine can flow into the second heat exchange channels of the plurality of first heat regenerators respectively, and the high-temperature steam flowing out of the exhaust port of the second turbine can be used to heat the water flowing through the first heat exchange channels of each first heat regenerator; the water flowing through the first heat exchange channels of the plurality of first heat regenerators can flow to the third heat exchange channels of the plurality of second heat regenerators in sequence. During this process, the high-temperature steam flowing out of the exhaust port or the exhaust port of the first turbine can flow into the second heat exchange channels of the plurality of Steam can flow into the fourth heat exchange channel of the second regenerator, and the high-temperature steam flowing out of the outlet or exhaust port of the first turbine can be used to heat the water flowing through the third heat exchange channel of each second regenerator, so that the water flowing into the third heat exchange channel of the first second regenerator can be heated and vaporized after passing through multiple second regenerators. Since the third heat exchange channels of multiple second regenerators are connected to the air inlet of the first combustion chamber in sequence, the inlet temperature of the first combustion chamber can be increased, and then the temperature of the hydrogen and oxygen flowing into the first combustion chamber can be increased, thereby improving the combustion efficiency of the first combustion chamber, and realizing efficient utilization of the heat generated by hydrogen combustion. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 The figure shows a schematic structural diagram of a circulating power generation system in one embodiment of the present application.

[0040] Figure 2 A schematic structural diagram of a cyclic power generation system in another embodiment of the present application is shown.

[0041] Figure 3 A schematic structural diagram of a first turbine and a first generator in one embodiment of the present application is shown.

[0042] Figure numerals: 10, cycle power generation system; 101, first combustion chamber; 102, first turbine; 103, second combustion chamber; 104, second turbine; 105, condenser; 106, first pump; 107, third turbine; 200, first regenerator; 300, second regenerator; 410, deaerator; 420, second pump; 430, steam turbine; 500, third regenerator; 610, fourth regenerator; 620, fifth regenerator; 630, sixth regenerator; 640, seventh regenerator; 650, first compressor; 660, second compressor ; 670, the eighth regenerator; 710, the first generator; H1, the first heat exchange channel; H2, the second heat exchange channel; H3, the third heat exchange channel; H4, the fourth heat exchange channel; H5, the fifth heat exchange channel; H6, the sixth heat exchange channel; H7, the seventh heat exchange channel; H8, the eighth heat exchange channel; H9, the ninth heat exchange channel; H10, the tenth heat exchange channel; H11, the eleventh heat exchange channel; H12, the twelfth heat exchange channel; H13, the thirteenth heat exchange channel; H14, the fourteenth heat exchange channel; H15, the fifteenth heat exchange channel; H16, the sixteenth heat exchange channel. DETAILED DESCRIPTION

[0043] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0044] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply 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 a limitation on this application.

[0045] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0046] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0047] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0048] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0049] Figure 1 The figure shows a schematic structural diagram of a circulating power generation system in one embodiment of the present application. Figure 2 A schematic structural diagram of a cyclic power generation system in another embodiment of the present application is shown.

[0050] See also Figure 1 and Figure 2An embodiment of the present application provides a circulating power generation system 10, including a first combustion chamber 101, a first turbine 102, a second combustion chamber 103, a second turbine 104, a condenser 105, a first pump 106, a plurality of first regenerators 200 and a plurality of second regenerators 300.

[0051] The first combustion chamber 101 has an air inlet and an air outlet. The air inlet of the first combustion chamber 101 is used to be connected to the first oxygen source and the first hydrogen source respectively, and oxygen and hydrogen can be provided to the first combustion chamber 101 by means of the first oxygen source and the first hydrogen source respectively.

[0052] The first turbine 102 has an air inlet, an air exhaust port and an air outlet. The air outlet of the first combustion chamber 101 is connected to the air inlet of the first turbine 102. The second combustion chamber 103 has an air inlet and an air outlet. The air outlet of the first turbine 102 is connected to the air inlet of the second combustion chamber 103. The air inlet of the second combustion chamber 103 is used to be connected to the second oxygen source and the second hydrogen source respectively. Oxygen and hydrogen can be provided to the first combustion chamber 101 respectively with the help of the second oxygen source and the second hydrogen source.

[0053] The second turbine 104 has an air inlet, an air exhaust port and an air outlet, and the second turbine 104 can receive the gas flowing out from the air outlet of the second combustion chamber 103; the condenser 105 has an air inlet and a water outlet, and the air outlet of the second turbine 104 is connected to the air inlet of the condenser 105.

[0054] The oxygen and hydrogen entering the first combustion chamber 101 are burned in the first combustion chamber 101, and the high-temperature steam generated after the combustion first enters the first turbine 102, expands and performs work in the first turbine 102, and then enters the second combustion chamber 103. The oxygen and hydrogen entering the second combustion chamber 103 will also generate high-temperature water vapor after being burned in the second combustion chamber 103. This part of the high-temperature water vapor enters the second turbine 104 together with the gas flowing into the second combustion chamber 103 from the first turbine 102, and expands and performs work in the second turbine 104. After completing the expansion work, the high-temperature water vapor will enter the condenser 105 and condense into water through the condenser 105.

[0055] The first reheater 200 has a first heat exchange channel H1 and a second heat exchange channel H2 for exchanging heat with the first heat exchange channel H1. The water outlet of the condenser 105 is connected to the liquid inlet ends of the first heat exchange channels H1 of multiple first reheaters 200 in sequence through the first pump 106; the second heat exchange channels H2 of multiple first reheaters 200 are all connected to the exhaust port of the second turbine 104; among two adjacent first reheaters 200, the outlet end of the second heat exchange channel H2 of one first reheater 200 is connected to the inlet end of the second heat exchange channel H2 of the other first reheater 200.

[0056] In this way, the water condensed by the condenser 105 can be pumped sequentially to the first heat exchange channels H1 of multiple first regenerators 200 through the first pump 106. During this process, the high-temperature water vapor flowing out of the exhaust port of the second turbine 104 can flow into the second heat exchange channels H2 of multiple first regenerators 200 respectively. The high-temperature water vapor flowing out of the exhaust port of the second turbine 104 can be used to heat the water flowing through the first heat exchange channel H1 of each first regenerator 200, so that the water flowing through the first heat exchange channel H1 of the first regenerator 200 can be heated and vaporized subsequently.

[0057] Each of the multiple second regenerators 300 has a third heat exchange channel H3 and a fourth heat exchange channel H4 for exchanging heat with the third heat exchange channel H3. The third heat exchange channels H3 of the multiple second regenerators 300 are sequentially connected to the air inlet of the first combustion chamber 101, and the third heat exchange channels H3 of the multiple second regenerators 300 are used to receive liquid flowing out of the first heat exchange channels H1 of the multiple first regenerators 200. The fourth heat exchange channels H4 of the multiple second regenerators 300 are connected to the air outlet or exhaust port of the first turbine 102. In two adjacent second regenerators 300, the air outlet end of the fourth heat exchange channel H4 of one second regenerator 300 is connected to the air inlet end of the fourth heat exchange channel H4 of the other second regenerator 300.

[0058] In this way, the water flowing through the first heat exchange channels H1 of the plurality of first heat exchangers 200 can flow to the third heat exchange channels H3 of the plurality of second heat exchangers 300 in sequence. In this process, the high-temperature steam flowing out of the air outlet or the air exhaust port of the first turbine 102 can flow into the fourth heat exchange channel H4 of the second heat exchanger 300. The high-temperature steam flowing out of the air outlet or the air exhaust port of the first turbine 102 can be used to heat the water flowing through the third heat exchange channel H3 of each second heat exchanger 300, so that the water flowing into the third heat exchange channel H3 of the first second heat exchanger 300 can pass through the plurality of second heat exchangers. The heat generated by the hydrogen combustion is heated and vaporized after passing through the heat exchanger 300. Since the third heat exchange channels H3 of the multiple second heat exchangers 300 are sequentially connected to the air inlet of the first combustion chamber 101, the inlet temperature of the first combustion chamber 101 can be increased, thereby increasing the temperature of the hydrogen and oxygen flowing into the first combustion chamber 101, thereby improving the combustion efficiency of the first combustion chamber 101, and realizing efficient utilization of the heat generated by the hydrogen combustion. Compared with the traditional closed Rankine cycle, the combustion chamber contains hydrogen and pure oxygen, which can achieve higher main steam parameters, and the combustion product is only water, thereby improving the cleanliness of the cycle power generation system 10.

[0059] It should be noted that the cycle power generation system 10 further includes a first generator 710 (eg, Figure 3As shown in the figure, the high-temperature steam generated by the combustion of oxygen and hydrogen in the first combustion chamber 101 can enter the first turbine 102 and expand and perform work in the first turbine 102. During this process, the first turbine 102 can drive the first generator 710 to generate electricity.

[0060] The circulating power generation system 10 also includes a second generator (not shown in the figure) connected to the second turbine 104. The high-temperature steam generated by the combustion of oxygen and hydrogen in the second combustion chamber 103 can enter the second turbine 104 and expand and perform work in the second turbine 104. During this process, the second turbine 104 can drive the second generator to generate electricity.

[0061] In some embodiments, the pipe between the water outlet of the condenser 105 and the first pump 106 is connected to the gas outlet end of the second heat exchange channel H2 of the first regenerator 200 closest to the first pump 106 .

[0062] Optionally, the number of the first regenerators 200 is at least three.

[0063] For example, the number of the first regenerators 200 is three, four or more.

[0064] Assume that there are four first regenerators 200. In the direction away from the first pump 106 and toward the first pump 106, the four first regenerators 200 are respectively the first first regenerator 200, the second first regenerator 200, the third first regenerator 200, and the fourth first regenerator 200. The second turbine 104 has multiple air extraction ports, and the multiple air extraction ports include a first-stage air extraction port, a second-stage air extraction port, a third-stage air extraction port, and a fourth-stage air extraction port. The first-stage air extraction port is connected to the air inlet end of the second heat exchange channel H2 of the first first regenerator 200, the second-stage air extraction port is connected to the air inlet end of the second heat exchange channel H2 of the second first regenerator 200, and the third-stage air extraction port is connected to the air inlet end of the second heat exchange channel H2 of the third first regenerator 200. The air inlet end is connected, the fourth-stage air extraction port is connected to the air inlet end of the second heat exchange channel H2 of the fourth first reheat regenerator 200, the air outlet end of the second heat exchange channel H2 of the first first reheat regenerator 200 is connected to the air inlet end of the second heat exchange channel H2 of the second first reheat regenerator 200, the air outlet end of the second heat exchange channel H2 of the second first reheat regenerator 200 is connected to the air inlet end of the second heat exchange channel H2 of the third first reheat regenerator 200, the air outlet end of the second heat exchange channel H2 of the third first reheat regenerator 200 is connected to the air inlet end of the second heat exchange channel H2 of the fourth first reheat regenerator 200, and the air outlet end of the second heat exchange channel H2 of the fourth first reheat regenerator 200 is connected to the pipeline between the water outlet of the condenser 105 and the first pump 106.

[0065] In this way, the high-temperature water vapor after the second turbine 104 completes expansion and work will flow step by step to the first first reheater 200, the second first reheater 200, the third first reheater 200 and the second heat exchange channel H2 of the fourth first reheater 200. The water condensed by the condenser 105 can flow step by step to the fourth first reheater 200, the third first reheater 200, the second first reheater 200 and the first heat exchange channel H1 of the first first reheater 200 through the first pump 106, and then be transported to the deaerator 410 described below, so that the water condensed by the condenser 105 can be heated and vaporized in subsequent processes, thereby increasing the inlet temperature of the first combustion chamber 101, thereby improving the combustion efficiency of the first combustion chamber 101.

[0066] In some embodiments, the cyclic power generation system 10 further includes a deaerator 410 and a second pump 420. The deaerator 410 has a liquid inlet and a liquid outlet. The liquid inlet of the deaerator 410 is sequentially connected to the liquid outlets of the first heat exchange channels H1 of the plurality of first regenerators 200. The deaerator 410 supplies liquid flowing out of the liquid outlet of the deaerator 410 to the third heat exchange channels H3 of the plurality of second regenerators 300 via the second pump 420.

[0067] In this way, the high-temperature steam and the water condensed from the condenser 105 can be deoxygenated by the deaerator 410 and then flow to the third heat exchange channel H3 of the plurality of second regenerators 300 so as to subsequently heat and vaporize the condensed water.

[0068] In some embodiments, the cycle power generation system 10 further includes a third turbine 107 and a third regenerator 500. The third turbine 107 has an air inlet, an air exhaust port, and an air outlet. The air inlet of the third turbine 107 is connected to the air outlet of the second combustion chamber 103, and the air outlet of the third turbine 107 is connected to the air inlet of the second turbine 104. The third regenerator 500 has a fifth heat exchange channel H5 and a sixth heat exchange channel H6 for exchanging heat with the fifth heat exchange channel H5. The liquid inlet of the fifth heat exchange channel H5 of the third regenerator 500 is connected to the liquid outlet of the second pump 420, and the liquid outlet of the fifth heat exchange channel H5 of the third regenerator 500 is connected to the third heat exchange channel H3 of an adjacent second regenerator 300. The sixth heat exchange channel H6 of the third regenerator 500 is connected to the air exhaust port of the third turbine 107.

[0069] Optionally, the number of the second regenerators 300 is at least two.

[0070] The number of the second regenerators 300 may be two, three or more.

[0071] Taking the number of the second regenerators 300 as an example, the two second regenerators 300 are respectively the first second regenerator 300 and the second second regenerator 300 in the direction from the first combustion chamber 101 to the direction away from the first combustion chamber 101, the exhaust port of the first turbine 102 is connected to the air inlet end of the fourth heat exchange channel H4 of the first second regenerator 300, the air outlet of the first turbine 102 is connected to the air inlet end of the second combustion chamber 103, and the air outlet of the first turbine 102 is separated into A bypass is connected to the air inlet end of the fourth heat exchange channel H4 of the second second reheater 300, the air outlet end of the fourth heat exchange channel H4 of the first second reheater 300 is connected to the air inlet end of the fourth heat exchange channel H4 of the second second reheater 300, the air outlet end of the fourth heat exchange channel H4 of the second second reheater 300 is connected to the air inlet end of the sixth heat exchange channel H6 of the third reheater 500, and the air outlet end of the sixth heat exchange channel H6 of the third reheater 500 is connected to the air inlet of the deaerator 410.

[0072] The high-temperature water vapor generated after combustion in the second combustion chamber 103 will first enter the third turbine 107 and then enter the second turbine 104, and expand and perform work in the third turbine 107 and the second turbine 104 in succession. The high-temperature steam after expansion and work from the third turbine 107 can flow to the sixth heat exchange channel H6 of the third reheater 500, and the water deoxygenated by the deaerator 410 can flow to the fifth heat exchange channel H5 of the third reheater 500, the third heat exchange channel H3 of the second second reheater 300 and the third heat exchange channel H3 of the first second reheater 300 in sequence through the second pump 420. It can be heated and vaporized by the high-temperature steam flowing into the sixth heat exchange channel H6 of the third reheater 500 and the high-temperature steam flowing into the fourth heat exchange channel H4 of multiple second reheaters 300, thereby increasing the inlet temperature of the first combustion chamber 101 and thereby improving the combustion efficiency of the first combustion chamber 101.

[0073] In addition, since the air outlet end of the sixth heat exchange channel H6 of the third regenerator 500 is connected to the air inlet of the deaerator 410, after the high-temperature steam flowing into the sixth heat exchange channel H6 of the third regenerator 500 heats the water flowing into the fifth heat exchange channel H5 of the third regenerator 500, the high-temperature steam flowing out of the third regenerator 500 will enter the deaerator 410 and then flow into the circulation system of the circulation power generation system 10 for recycling.

[0074] In some embodiments, the circulating power generation system 10 also includes a third generator (not shown in the figure) connected to the third turbine 107. The high-temperature water vapor generated after combustion in the second combustion chamber 103 will first enter the third turbine 107 and then enter the second turbine 104, and expand and perform work in the third turbine 107 and the second turbine 104 successively. During the process of the high-temperature water vapor expanding and performing work in the third turbine 107, the third turbine 107 can drive the third generator to generate electricity.

[0075] In some embodiments, the cycle power generation system 10 further includes a steam turbine 430 having an air inlet. The air outlet of the third turbine 107 is connected to the air inlet of the steam turbine 430 so as to drive the second pump 420 with the help of the steam turbine 430 .

[0076] Optionally, the steam turbine 430 is a small steam turbine.

[0077] Optionally, the steam turbine 430 further has an air outlet, and the air outlet of the steam turbine 430 is connected to the air inlet of the deaerator 410 .

[0078] A bypass is separated from the air outlet of the third turbine 107 and connected to the air inlet of the steam turbine 430 to provide the steam turbine 430 with an air source to drive the second pump 420. The high-temperature steam flowing out of the air outlet of the third turbine 107 is used to enable the steam turbine 430 to drive the second pump 420 to do work. After completing the work, the high-temperature steam will enter the deaerator 410 and then flow into the circulation system of the circulating power generation system 10 for recycling.

[0079] Specifically, Figure 1In the embodiment shown, the oxygen and hydrogen entering the first combustion chamber 101 are burned in the first combustion chamber 101. The high-temperature steam generated after the combustion first enters the first turbine 102, expands and performs work in the first turbine 102, and then enters the second combustion chamber 103. The oxygen and hydrogen entering the second combustion chamber 103 also generate high-temperature water vapor after being burned in the second combustion chamber 103. This part of the high-temperature water vapor enters the third turbine 107 together with the gas flowing from the first turbine 102 into the second combustion chamber 103. , and then enters the second turbine 104, and expands and performs work in the third turbine 107 and the second turbine 104 successively. After completing the expansion work, the high-temperature water vapor will enter the condenser 105 and condense into water through the condenser 105. The water condensed by the condenser 105 can flow step by step through the first pump 106 to the fourth first reheater 200, the third first reheater 200, the second first reheater 200 and the first heat exchange channel H1 of the first first reheater 200, and then be transported to the deaerator 410. The water deoxygenated by the deaerator 410 can flow to the fifth heat exchange channel H5 of the third regenerator 500, the third heat exchange channel H3 of the second second regenerator 300 and the third heat exchange channel H3 of the first second regenerator 300 in sequence through the second pump 420. In this process, the high-temperature steam expanded and worked from the second turbine 104 can flow into the second heat exchange channel H2 of multiple first regenerators 200, the high-temperature steam expanded and worked from the third turbine 107 can flow into the sixth heat exchange channel H6 of the third regenerator 500, and the high-temperature water vapor expanded and worked from the first turbine 102 can flow into the fourth heat exchange channel H4 of multiple second regenerators 300. In this way, the water condensed by the condenser 105 can be heated and vaporized into steam, and the vaporized steam will flow into the first combustion chamber 101, thereby increasing the inlet temperature of the first combustion chamber 101, thereby improving the combustion efficiency of the first combustion chamber 101.

[0080] Through the semi-closed Rankine cycle based on direct combustion of hydrogen and oxygen, the efficient utilization of hydrogen in the field of heat-to-power conversion is improved.

[0081] In some embodiments, the cycle power generation system 10 also includes a fourth reheater 610 and a fifth reheater 620 that is farther away from the first combustion chamber 101 than the fourth reheater 610. The fourth reheater 610 has a seventh heat exchange channel H7 and an eighth heat exchange channel H8 for exchanging heat with the seventh heat exchange channel H7. The fifth reheater 620 has a ninth heat exchange channel H9 and a tenth heat exchange channel H10 for exchanging heat with the ninth heat exchange channel H9. The seventh heat exchange channel H7 of the fourth reheater 610 and the ninth heat exchange channel H9 of the fifth reheater 620 are connected between the air inlet of the first combustion chamber 101 and the third heat exchange channel H3 of the second reheater 300. The eighth heat exchange channel H8 of the fourth reheater 610 and the tenth heat exchange channel H10 of the fifth reheater 620 are both connected to the exhaust port of the first turbine 102.

[0082] In this embodiment, the plurality of air extraction ports of the first turbine 102 include a first-stage air extraction port and a second-stage air extraction port.

[0083] The first-stage exhaust port of the first turbine 102 is respectively connected to the air inlet end of the eighth heat exchange channel H8 of the fourth reheater 610 and the air inlet end of the tenth heat exchange channel H10 of the fifth reheater 620, the second-stage exhaust port of the first turbine 102 is connected to the air inlet end of the fourth heat exchange channel H4 of the first second reheater 300, the air outlet of the first turbine 102 is connected to the air inlet of the second combustion chamber 103, and a bypass is separated from the air outlet of the first turbine 102 to be connected to the air inlet end of the fourth heat exchange channel H4 of the second second reheater 300.

[0084] In this way, the water deoxygenated by the deaerator 410 can flow to the fifth heat exchange channel H5 of the third reheater 500, the third heat exchange channel H3 of the second second reheater 300 and the third heat exchange channel H3 of the first second reheater 300 in sequence through the second pump 420, and then flow to the ninth heat exchange channel H9 of the fifth reheater 620 and the seventh heat exchange channel H7 of the fourth reheater 610. It can be heated and vaporized through the high-temperature steam flowing into the sixth heat exchange channel H6 of the third reheater 500, the high-temperature steam flowing into the fourth heat exchange channel H4 of multiple second reheaters 300, the high-temperature steam flowing into the tenth heat exchange channel H10 of the fifth reheater 620 and the eighth heat exchange channel H8 of the fourth reheater 610, thereby increasing the inlet temperature of the first combustion chamber 101, thereby improving the combustion efficiency of the first combustion chamber 101.

[0085] In some embodiments, the cycle power generation system 10 further includes a sixth regenerator 630, a seventh regenerator 640, and a first compressor 650. The sixth regenerator 630 has an eleventh heat exchange channel H11 and a twelfth heat exchange channel H12 for exchanging heat with the eleventh heat exchange channel H11. The seventh regenerator 640 has a thirteenth heat exchange channel H13 and a fourteenth heat exchange channel H14 for exchanging heat with the thirteenth heat exchange channel H13. The eleventh heat exchange channel H11 of the sixth regenerator 630 and the thirteenth heat exchange channel H13 of the seventh regenerator 640 are sequentially connected and connected between the ninth heat exchange channel H9 of the fifth regenerator 620 and the third heat exchange channel H3 of the adjacent second regenerator 300. The air outlet end of the tenth heat exchange channel H10 of the fifth reheater 620 is connected to the air inlet end of the twelfth heat exchange channel H12 of the sixth reheater 630, the air outlet end of the twelfth heat exchange channel H12 of the sixth reheater 630 is connected to the air inlet end of the first compressor 650, and the air outlet end of the first compressor 650 and the air outlet end of the eleventh heat exchange channel H11 of the sixth reheater 630 are connected in parallel to the ninth heat exchange channel H9 of the fifth reheater 620.

[0086] After the high-temperature steam flowing into the tenth heat exchange channel H10 of the fifth regenerator 620 heats the fluid (vaporized water) flowing into the ninth heat exchange channel H9 of the fifth regenerator 620, it will flow to the twelfth heat exchange channel H12 of the sixth regenerator 630 and the first compressor 650, and then after being compressed and pressurized by the first compressor 650, it will flow to the ninth heat exchange channel H9 of the fifth regenerator 620 together with the fluid (vaporized water) flowing out of the eleventh heat exchange channel H11 of the sixth regenerator 630, thereby pressurizing the gas flowing to the inlet of the first combustion chamber 101.

[0087] In some embodiments, the circulating power generation system 10 also includes a second compressor 660, the outlet end of the twelfth heat exchange channel H12 of the sixth regenerator 630 is also connected to the inlet end of the fourteenth heat exchange channel H14 of the seventh regenerator 640, the outlet end of the fourteenth heat exchange channel H14 of the seventh regenerator 640 is connected to the inlet end of the second compressor 660, and the outlet end of the second compressor 660 and the outlet end of the thirteenth heat exchange channel H13 of the seventh regenerator 640 are connected in parallel to the eleventh heat exchange channel H11 of the sixth regenerator 630.

[0088] After the high-temperature steam flowing into the twelfth heat exchange channel H12 of the sixth regenerator 630 heats the fluid (vaporized water) flowing into the eleventh heat exchange channel H11 of the sixth regenerator 630, it will flow to the fourteenth heat exchange channel H14 of the seventh regenerator 640 and the second compressor 660, and then after being compressed and pressurized by the second compressor 660, it will flow to the eleventh heat exchange channel H11 of the sixth regenerator 630 together with the fluid (vaporized water) flowing out of the thirteenth heat exchange channel H13 of the seventh regenerator 640, so as to better realize the pressurization of the gas flowing to the inlet of the first combustion chamber 101.

[0089] In some embodiments, the cycle power generation system 10 further includes an eighth regenerator 670 having a fifteenth heat exchange channel H15 and a sixteenth heat exchange channel H16 for exchanging heat with the fifteenth heat exchange channel H15. The fifteenth heat exchange channel H15 of the eighth regenerator 670 is connected between the air outlet of the first turbine 102 and the air inlet of the second combustion chamber 103. The outlet end of the eighth heat exchange channel H8 of the fourth regenerator 610 is connected to the air inlet end of the sixteenth heat exchange channel H16 of the eighth regenerator 670, and the outlet end of the sixteenth heat exchange channel H16 of the eighth regenerator 670 is connected to the air inlet end of the second compressor 660.

[0090] The high-temperature steam flowing into the eighth heat exchange channel H8 of the fourth regenerator 610 heats the fluid (vaporized water) flowing into the seventh heat exchange channel H7 of the fourth regenerator 610. The steam then flows into the sixteenth heat exchange channel H16 of the eighth regenerator 670, heating the gas within the fifteenth heat exchange channel H15 of the eighth regenerator 670. This, in turn, heats the gas flowing from the outlet of the first turbine 102 to the inlet of the second combustion chamber 103, thereby increasing the inlet temperature of the second combustion chamber 103 and improving the combustion efficiency of the second combustion chamber 103. The steam flowing out of the sixteenth heat exchange channel H16 of the eighth regenerator 670 also flows into the second compressor 660 and then into the circulation system of the power generation system 10 for recycling.

[0091] Specifically, Figure 2In the embodiment shown, the oxygen and hydrogen entering the first combustion chamber 101 are burned in the first combustion chamber 101. The high-temperature steam generated after the combustion first enters the first turbine 102, expands and performs work in the first turbine 102, and then enters the second combustion chamber 103. The oxygen and hydrogen entering the second combustion chamber 103 also generate high-temperature water vapor after being burned in the second combustion chamber 103. This part of the high-temperature water vapor enters the third turbine 107 together with the gas flowing from the first turbine 102 into the second combustion chamber 103. , and then enters the second turbine 104, and expands and performs work in the third turbine 107 and the second turbine 104 successively. After completing the expansion work, the high-temperature water vapor will enter the condenser 105 and condense into water through the condenser 105. The water condensed by the condenser 105 can flow step by step through the first pump 106 to the fourth first reheater 200, the third first reheater 200, the second first reheater 200 and the first heat exchange channel H1 of the first first reheater 200, and then be transported to the deaerator 410. The water deoxygenated by the deaerator 410 can flow to the fifth heat exchange channel H5 of the third regenerator 500, the third heat exchange channel H3 of the second second regenerator 300 and the third heat exchange channel H3 of the first second regenerator 300 in sequence through the second pump 420, so that the water can be heated and vaporized into steam. The vaporized steam will flow into the thirteenth heat exchange channel H13 of the seventh regenerator 640, the eleventh heat exchange channel H11 of the sixth regenerator 630, the ninth heat exchange channel H9 of the fifth regenerator 620 and the seventh heat exchange channel H7 of the fourth regenerator 610 in sequence, and then flow into the first combustion chamber 101. In this process, the high-temperature steam after expansion and work from the second turbine 104 can flow into the second heat exchange channel H2 of multiple first regenerators 200, and the high-temperature steam after expansion and work from the third turbine 107 can flow into the second heat exchange channel H2 of multiple first regenerators 200. The warm steam can flow into the sixth heat exchange channel H6 of the third regenerator 500, and the high-temperature water vapor after expansion and work from the first turbine 102 can flow into the fourth heat exchange channel H4 of multiple second regenerators 300, the tenth heat exchange channel H10 of the fifth regenerator 620 and the eighth heat exchange channel H8 of the fourth regenerator 610. The high-temperature steam flowing out of the tenth heat exchange channel H10 of the fifth regenerator 620 can flow into the twelfth heat exchange channel H12 of the sixth regenerator 630, and the high-temperature steam flowing out of the twelfth heat exchange channel H12 of the sixth regenerator 630 can flow into the fourteenth heat exchange channel H14 of the seventh regenerator 640. In this way, the vaporized steam can be heated through multiple regenerators, thereby increasing the inlet temperature of the first combustion chamber 101 and improving the combustion efficiency of the first combustion chamber 101.

[0092] By applying the semi-closed Rankine cycle to hydrogen fuel utilization, it has higher thermal efficiency. Especially when the cycle is coupled with the supercritical compression reheat process, the average heat absorption temperature is significantly increased and the cycle thermal efficiency is further improved.

[0093] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0094] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A cycle power generation system, characterized in that: include: a first combustion chamber having an air inlet and an air outlet, wherein the air inlet of the first combustion chamber is used to be connected to a first oxygen source and a first hydrogen source respectively; a first turbine having an air inlet, an air extraction port, and an air outlet; the air outlet of the first combustion chamber is connected to the air inlet of the first turbine; a second combustion chamber having an air inlet and an air outlet, wherein the air outlet of the first turbine is connected to the air inlet of the second combustion chamber; and the air inlet of the second combustion chamber is connected to a second oxygen source and a second hydrogen source, respectively; a second turbine having an air inlet, an air extraction port, and an air outlet; the second turbine being capable of receiving the gas flowing out of the air outlet of the second combustion chamber; a condenser having an air inlet and a water outlet, wherein the air outlet of the second turbine is connected to the air inlet of the condenser; a first pump and a plurality of first regenerators, wherein the first regenerators have a first heat exchange channel and a second heat exchange channel for exchanging heat with the first heat exchange channel; the water outlet of the condenser is sequentially connected to the liquid inlet ends of the first heat exchange channels of the plurality of first regenerators through the first pump; the second heat exchange channels of the plurality of first regenerators are all connected to the exhaust port of the second turbine; and of two adjacent first regenerators, the air outlet end of the second heat exchange channel of one of the first regenerators is connected to the air inlet end of the second heat exchange channel of the other first regenerator; and Multiple second heat exchangers each have a third heat exchange channel and a fourth heat exchange channel for exchanging heat with the third heat exchange channel; the third heat exchange channels of the multiple second heat exchangers are connected to the air inlet of the first combustion chamber in sequence, and are used to receive the liquid flowing out of the first heat exchange channels of the multiple first heat exchangers; the fourth heat exchange channels of the multiple second heat exchangers are connected to the air outlet or exhaust port of the first turbine; among two adjacent second heat exchangers, the air outlet end of the fourth heat exchange channel of one of the second heat exchangers is connected to the air inlet end of the fourth heat exchange channel of the other second heat exchanger.

2. The cycle power generation system according to claim 1, characterized in that: The cycle power generation system further includes: a deaerator having a liquid inlet and a liquid outlet, wherein the liquid inlet of the deaerator is sequentially connected to the liquid outlet ends of the first heat exchange channels of the plurality of first regenerators; and The deaerator supplies the liquid flowing out of the liquid outlet of the deaerator to the third heat exchange channels of the plurality of second regenerators through the second pump.

3. The cycle power generation system according to claim 2, characterized in that: The cycle power generation system further includes: a third turbine having an air inlet, an air extraction port, and an air outlet, wherein the air inlet of the third turbine is connected to the air outlet of the second combustion chamber, and the air outlet of the third turbine is connected to the air inlet of the second turbine; and a third heat exchanger; having a fifth heat exchange channel and a sixth heat exchange channel for exchanging heat with the fifth heat exchange channel; the liquid inlet end of the fifth heat exchange channel of the third heat exchanger is connected to the liquid outlet end of the second pump, and the liquid outlet end of the fifth heat exchange channel of the third heat exchanger is connected to the third heat exchange channel of an adjacent second heat exchanger; the sixth heat exchange channel of the third heat exchanger is connected to the exhaust port of the third turbine.

4. The cycle power generation system according to claim 3, characterized in that: The cycle power generation system further includes a steam turbine connected to the second pump, wherein the steam turbine has an air inlet; An air outlet of the third turbine is connected to an air inlet of the steam turbine so as to drive the second pump by means of the steam turbine.

5. The cycle power generation system according to claim 1, characterized in that: The number of the first heat regenerators is at least three.

6. The cycle power generation system according to claim 1, characterized in that: The number of the second heat regenerators is at least two.

7. The cyclic power generation system according to any one of claims 1 to 6, characterized in that: The cycle power generation system further includes a fourth regenerator and a fifth regenerator further away from the first combustion chamber than the fourth regenerator; The fourth regenerator has a seventh heat exchange channel and an eighth heat exchange channel for exchanging heat with the seventh heat exchange channel; The fifth regenerator has a ninth heat exchange channel and a tenth heat exchange channel for exchanging heat with the ninth heat exchange channel; The seventh heat exchange channel of the fourth regenerator and the ninth heat exchange channel of the fifth regenerator are connected between the air inlet of the first combustion chamber and the third heat exchange channel of the second regenerator; The eighth heat exchange channel of the fourth regenerator and the tenth heat exchange channel of the fifth regenerator are both connected to the exhaust port of the first turbine.

8. The cycle power generation system according to claim 7, characterized in that: The cycle power generation system further includes a sixth regenerator, a seventh regenerator and a first compressor; The sixth regenerator has an eleventh heat exchange channel and a twelfth heat exchange channel for exchanging heat with the eleventh heat exchange channel; The seventh regenerator has a thirteenth heat exchange channel and a fourteenth heat exchange channel for exchanging heat with the thirteenth heat exchange channel; The eleventh heat exchange channel of the sixth regenerator and the thirteenth heat exchange channel of the seventh regenerator are sequentially connected, and are connected between the ninth heat exchange channel of the fifth regenerator and the third heat exchange channel of the adjacent second regenerator; The air outlet end of the tenth heat exchange channel of the fifth regenerator is connected to the air inlet end of the twelfth heat exchange channel of the sixth regenerator, the air outlet end of the twelfth heat exchange channel of the sixth regenerator is connected to the air inlet end of the first compressor, and the air outlet end of the first compressor and the air outlet end of the eleventh heat exchange channel of the sixth regenerator are connected in parallel to the ninth heat exchange channel of the fifth regenerator.

9. The cycle power generation system according to claim 8, characterized in that: The cycle power generation system further includes a second compressor; The air outlet end of the twelfth heat exchange channel of the sixth regenerator is also connected to the air inlet end of the fourteenth heat exchange channel of the seventh regenerator, the air outlet end of the fourteenth heat exchange channel of the seventh regenerator is connected to the air inlet end of the second compressor, and the air outlet end of the second compressor and the air outlet end of the thirteenth heat exchange channel of the seventh regenerator are connected in parallel to the eleventh heat exchange channel of the sixth regenerator.

10. The cycle power generation system according to claim 9, characterized in that: The cycle power generation system further includes an eighth regenerator; The eighth regenerator has a fifteenth heat exchange channel and a sixteenth heat exchange channel for exchanging heat with the fifteenth heat exchange channel; The fifteenth heat exchange channel of the eighth regenerator is connected between the air outlet of the first turbine and the air inlet of the second combustion chamber; The air outlet end of the eighth heat exchange channel of the fourth regenerator is connected to the air inlet end of the sixteenth heat exchange channel of the eighth regenerator, and the air outlet end of the sixteenth heat exchange channel of the eighth regenerator is connected to the air inlet end of the second compressor.

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