Gas-steam combined cycle unit

Abstract

The invention provides a gas-steam combined cycle unit which is characterized in that a first steam outlet is communicated with a first steam inlet, a second steam outlet is communicated with a first water inlet, and a rotating part is in driving connection with a power generation part; the first heat exchange piece is provided with a first heat exchange channel and a second heat exchange channel, the second steam inlet communicates with the first steam outlet, the first fused salt inlet communicates with the first storage tank, the first fused salt outlet communicates with the second storage tank, and the third heat exchange channel is provided with a second fused salt inlet and a second fused salt outlet. The fourth heat exchange channel is provided with a second water inlet and a third steam outlet, the second fused salt inlet is communicated with the second storage tank, and the second fused salt outlet is communicated with the first storage tank. According to the technical scheme, the problem that in the related technology, after steam generated by a waste heat boiler is introduced into a steam turbine, the steam needs to be heated firstly, at the moment, the steam is directly recycled to the waste heat boiler when the temperature does not reach the working temperature, and part of heat is wasted can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of power generation, and in particular to a gas-steam combined cycle unit. Background Art

[0002] In the process of building a new power system with renewable energy as the main body, due to the strong intermittent and volatile characteristics of renewable energy, higher requirements are placed on the flexibility and regulation of the original power system. Compared with traditional methods, gas turbines have the advantages of fast response speed, high cycle efficiency and low carbon emissions, providing an effective way for the flexible peak regulation of new power systems. Gas units need to be started and stopped frequently to work. The reason for frequent start and stop is that the installed capacity of new energy is large, and the number of scenarios that require peak regulation has increased. The frequent start and stop of gas units can quickly respond to grid demand, improve grid stability and optimize energy utilization.

[0003] In the related art, a gas turbine usually forms a gas-steam combined cycle unit with a waste heat boiler and a steam turbine to improve the energy efficiency of the thermal system. However, during the startup of the gas-steam combined cycle unit, the gas unit starts and stops quickly and frequently. During the startup and shutdown process, the waste heat boiler needs to be heated up, and the steam generated by the waste heat boiler needs to be warmed up before entering the steam turbine. At this time, the steam temperature does not reach the operating temperature and is directly recovered to the waste heat boiler, which causes some heat waste in the above process. Summary of the invention

[0004] The present invention provides a gas-steam combined cycle unit to solve the problem in the related art that the steam generated by the waste heat boiler needs to be warmed up before entering the steam turbine, and the steam temperature does not reach the working temperature at this time and is directly recovered to the waste heat boiler, which will cause some heat waste.

[0005] The present invention provides a gas-steam combined cycle unit, which includes: a furnace body having a first steam outlet and a first water inlet; a power generation component, including a rotating part and a power generation component, the rotating part having a first steam inlet and a second steam outlet, the first steam outlet being connected to the first steam inlet, the second steam outlet being connected to the first water inlet, the rotating part being drivingly connected to the power generation component to control the power generation component to generate electricity; a heat storage component, including a first heat exchange component, a first storage tank, a second storage tank and a second heat exchange component, the first heat exchange component having a first heat exchange channel and a second heat exchange channel for mutual heat exchange, the first heat exchange channel having The second steam inlet, the second heat exchange channel includes a first molten salt inlet and a first molten salt outlet, the second steam inlet is connected to the first steam outlet, the first molten salt inlet is connected to the first storage tank, the first molten salt outlet is connected to the second storage tank, the second heat exchange element has a third heat exchange channel and a fourth heat exchange channel for mutual heat exchange, the third heat exchange channel has a second molten salt inlet and a second molten salt outlet, the fourth heat exchange channel has a second water inlet and a third steam outlet, the second molten salt inlet is connected to the second storage tank, the second molten salt outlet is connected to the first storage tank, the second water inlet is connected to a water source, and the third steam outlet is connected to an external device.

[0006] Furthermore, the heat storage component also includes a first pipeline and a second pipeline, the first end of the first pipeline is connected to the first steam outlet, the second end of the first pipeline is connected to the first steam inlet, the first end of the second pipeline is connected to the middle of the first pipeline, the second end of the second pipeline is connected to the second steam inlet, and a first opening and closing valve is provided on the second pipeline to control the steam flow between the first steam outlet and the second steam inlet.

[0007] Furthermore, the heat storage component also includes a third pipeline, a fourth steam outlet is arranged on the rotating member, the fourth steam outlet is connected to the first end of the third pipeline, the second end of the third pipeline is connected to the second steam inlet, and a second opening and closing valve is arranged on the third pipeline to control the steam flow between the fourth steam outlet and the second steam inlet.

[0008] Further, the first heat exchange element includes a first heat exchanger, the first heat exchanger includes a first heat exchange chamber, a first heat exchange pipeline and a second heat exchange pipeline, the first heat exchange pipeline and the second heat exchange pipeline are both arranged in the first heat exchange chamber, the first heat exchange channel is formed in the first heat exchange pipeline, the second heat exchange channel is formed in the second heat exchange pipeline, the second steam inlet is arranged on the first end of the first heat exchange pipeline, the second end of the second pipeline and the second end of the third pipeline are respectively connected to the first end of the first heat exchange pipeline, the first molten salt inlet is arranged on the first end of the second heat exchange pipeline, the first molten salt outlet is arranged on the second end of the second heat exchange pipeline and is connected to the second storage tank, and the second end of the first heat exchange pipeline is connected to the outside.

[0009] Further, the second heat exchange element includes a second heat exchanger, which has a second heat exchange chamber, a third heat exchange pipeline and a fourth heat exchange pipeline. The third heat exchange pipeline and the fourth heat exchange pipeline are both arranged in the second heat exchange chamber, the third heat exchange channel is formed in the third heat exchange pipeline, the fourth heat exchange channel is formed in the fourth heat exchange pipeline, the first end of the third heat exchange pipeline is connected to the second storage tank, the second end of the third heat exchange pipeline is connected to the first storage tank, the first end of the fourth heat exchange pipeline is connected to the water source, and the third steam outlet is arranged on the second end of the fourth heat exchange pipeline and is connected to the external equipment.

[0010] Furthermore, the rotating part includes a high-pressure cylinder, a medium-pressure cylinder and a low-pressure cylinder, the first steam inlet and the fourth steam outlet are both arranged on the high-pressure cylinder, the fourth steam outlet is respectively connected with the steam inlet of the medium-pressure cylinder and the first end of the third pipeline, the steam outlet of the medium-pressure cylinder is connected with the steam inlet of the low-pressure cylinder, and the second steam outlet is arranged on the low-pressure cylinder.

[0011] Furthermore, a condensation mechanism is provided between the second steam outlet and the first water inlet, so that the steam at the second steam outlet is condensed into water and passed into the first water inlet.

[0012] Furthermore, the condensing mechanism includes a condenser, a deaerator and a pump body, the second steam outlet is connected to the inlet of the condenser, the outlet of the condenser is connected to the inlet of the deaerator, the outlet of the deaerator is connected to the inlet of the pump body, and the outlet of the pump body is connected to the first water inlet.

[0013] Furthermore, a superheater is provided between the first steam outlet and the first steam inlet.

[0014] Furthermore, the furnace body includes a waste heat boiler, a gas turbine and a gas turbine generator. The gas turbine has a fuel inlet and an air inlet. The gas turbine is drivingly connected to the gas turbine generator. The waste heat boiler has a fuel chamber and a water storage chamber. The flue gas outlet of the gas turbine is connected to the fuel chamber, and the first steam outlet and the first water inlet are both connected to the water storage chamber.

[0015] According to the technical solution of the present invention, a gas-steam combined cycle unit includes a furnace body, a power generation component and a heat storage component. The furnace body has a first steam outlet and a first water inlet, so that condensed water is provided to the furnace body through the first water inlet, and the condensed water is heated in the furnace body to become steam and discharged from the furnace body through the first steam outlet. The power generation component includes a rotating part and a power generation component. The rotating part has a first steam inlet and a second steam outlet. The first steam inlet is connected to the first steam outlet, so that steam can be discharged into the rotating part through the first steam inlet, and the rotating part is driven by steam to rotate. The rotating part can be connected to the power generation component to control the power generation of the power generation component, so that the power generation component can realize the function of power generation under the action of steam, and the steam is discharged from the second steam outlet of the rotating part and is connected to the first water inlet, so that the steam flowing in the rotating part can be discharged into the furnace body through the first water inlet, so as to realize the recycling of water resources. Among them, when the gas-steam combined cycle unit starts working, the steam generated by the furnace body needs to be passed into the rotating parts to heat and warm up the rotating parts. However, during the warm-up operation, the rotating parts do not work, and the steam in this stage needs to be stored in heat to reduce energy loss and improve energy utilization. Specifically, a first heat exchange channel and a second heat exchange channel for mutual heat exchange are provided in the first heat exchange element, the second steam inlet of the second heat exchange channel is connected with the first steam outlet, so that part of the steam generated by the furnace body passes into the first heat exchange channel through the second steam inlet, the first molten salt inlet is connected with the first storage tank, so that the molten salt in the first storage tank is discharged into the second heat exchange channel through the first molten salt inlet, after exchanging heat with the steam, the temperature of the steam decreases, the temperature of the molten salt in the second heat exchange channel increases, and is discharged into the second storage tank through the first molten salt outlet, the second heat exchange element has a third heat exchange channel and a fourth heat exchange channel, the second molten salt inlet of the third heat exchange channel is connected with the second storage tank, and the heated molten salt is discharged into the third heat exchange channel, the second molten salt outlet of the third heat exchange channel is connected with the first storage tank, and the fourth heat exchange element The second water inlet of the hot channel is connected to the water source, and the condensed water is discharged into the fourth heat exchange channel and exchanged with the high-temperature molten salt in the third heat exchange channel, so that the high-temperature molten salt is exchanged into low-temperature molten salt and discharged into the first storage tank through the second molten salt outlet. The condensed water after the heat exchange is converted into steam and connected to the external equipment through the third steam outlet, so that part of the steam discharged from the first steam outlet can be discharged into the heat storage component to exchange heat with the molten salt, and the molten salt circulates between the first storage tank and the second storage tank through the first heat exchange element and the second heat exchange element, so that the molten salt constitutes a heat transfer medium to realize the storage of thermal energy. When thermal energy is needed, the molten salt is exchanged with the condensed water to become steam and passed into the external equipment. In this way, the resource utilization of the thermal energy of the steam is guaranteed when the rotating parts are warmed up, thereby avoiding the problem of waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic diagram of a gas-steam combined cycle unit provided according to an embodiment of the present invention is shown.

[0018] The above drawings include the following reference numerals:

[0019] 10. furnace body; 11. first steam outlet; 12. first water inlet;

[0020] 20. Power generation component; 21. Rotating member; 211. First steam inlet; 212. Second steam outlet; 213. Fourth steam outlet; 214. High-pressure cylinder; 215. Medium-pressure cylinder; 216. Low-pressure cylinder; 22. Power generation component;

[0021] 30. heat storage component; 31. first heat exchanger; 311. second steam inlet; 312. first molten salt inlet; 313. first molten salt outlet; 314. condensed water outlet; 32. first storage tank; 33. second storage tank; 34. second heat exchanger; 341. second molten salt inlet; 342. second molten salt outlet; 343. second water inlet; 344. third steam outlet; 35. first pipeline; 36. second pipeline; 37. first on-off valve; 38. third pipeline; 39. second on-off valve;

[0022] 40. Condensation mechanism; 41. Condenser; 42. Deaerator; 43. Pump body;

[0023] 50. Superheater. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] like Figure 1As shown, an embodiment of the present invention provides a gas-steam combined cycle unit, which includes a furnace body 10, a power generation component 20 and a heat storage component 30. The furnace body 10 has a first steam outlet 11 and a first water inlet 12. The power generation component 20 includes a rotating member 21 and a power generation component 22. The rotating member 21 has a first steam inlet 211 and a second steam outlet 212. The first steam outlet 11 is connected to the first steam inlet 211, and the second steam outlet 212 is connected to the first water inlet 12. The rotating member 21 is driven and connected to the power generation component 22 to control the power generation of the power generation component 22. The heat storage component 30 includes a first heat exchange component 31, a first storage tank 32, a second storage tank 33 and a second heat exchange component 34. The first heat exchange component 31 has a first heat exchange channel and a second heat exchange channel for mutual heat exchange. The first heat exchange channel has a second steam inlet 311, the second heat exchange channel includes a first molten salt inlet 312 and a first molten salt outlet 313, the second steam inlet 311 is connected to the first steam outlet 11, the first molten salt inlet 312 is connected to the first storage tank 32, the first molten salt outlet 313 is connected to the second storage tank 33, the second heat exchange element 34 has a third heat exchange channel and a fourth heat exchange channel for mutual heat exchange, the third heat exchange channel has a second molten salt inlet 341 and a second molten salt outlet 342, the fourth heat exchange channel has a second water inlet 343 and a third steam outlet 344, the second molten salt inlet 341 is connected to the second storage tank 33, the second molten salt outlet 342 is connected to the first storage tank 32, the second water inlet 343 is connected to a water source, and the third steam outlet 344 is connected to an external device.

[0026] The gas-steam combined cycle unit provided in this embodiment includes a furnace body 10, a power generation component 20 and a heat storage component 30. The furnace body 10 has a first steam outlet 11 and a first water inlet 12, so that condensed water is provided to the furnace body 10 through the first water inlet 12, and the condensed water is heated in the furnace body 10 to become steam, and discharged from the furnace body 10 through the first steam outlet 11. The power generation assembly 20 includes a rotating member 21 and a power generation member 22. The rotating member 21 has a first steam inlet 211 and a second steam outlet 212. The first steam inlet 211 is connected to the first steam outlet 11, so that steam can be discharged into the rotating member 21 through the first steam inlet 211. The rotating member 21 is driven by steam to rotate. The rotating member 21 can be driven and connected to the power generation member 22 to control the power generation of the power generation member 22, so that the power generation assembly 20 can achieve the function of power generation under the action of steam, and the steam is discharged from the second steam outlet 212 of the rotating member 21 and connected to the first water inlet 12. In this way, the steam flowing in the rotating member 21 can be discharged into the furnace body 10 through the first water inlet 12, so as to realize the recycling of water resources. Among them, when the gas-steam combined cycle unit starts working, it is necessary to first pass the steam generated by the furnace body 10 into the rotating member 21 to heat the rotating member 21 for warming up the machine. However, when the warming up operation is performed, the rotating member 21 does not work, and it is necessary to perform heat storage operation on the steam at this stage to reduce energy loss and improve energy utilization.Specifically, a first heat exchange channel and a second heat exchange channel for mutual heat exchange are provided in the first heat exchange element 31, and the second steam inlet 311 of the second heat exchange channel is connected with the first steam outlet 11, so that part of the steam generated by the furnace body 10 is passed into the first heat exchange channel through the second steam inlet 311, and the first molten salt inlet 312 is connected with the first storage tank 32, so that the molten salt in the first storage tank 32 is discharged into the second heat exchange channel through the first molten salt inlet 312. After heat exchange with the steam, the temperature of the steam decreases, and the temperature of the molten salt in the second heat exchange channel increases and is discharged into the second storage tank 33 through the first molten salt outlet 313. The second heat exchange element 34 has a third heat exchange channel and a fourth heat exchange channel. The second molten salt inlet 341 of the third heat exchange channel is connected with the second storage tank 33, and the heated molten salt is discharged into the third heat exchange channel. The second molten salt outlet 342 of the third heat exchange channel is connected with the first storage tank 32 The condensed water is discharged into the fourth heat exchange channel and exchanged with the high-temperature molten salt in the third heat exchange channel, so that the high-temperature molten salt is exchanged into low-temperature molten salt and discharged into the first storage tank 32 through the second molten salt outlet 342. The condensed water after the heat exchange is converted into steam and connected to the external equipment through the third steam outlet 344, so that part of the steam discharged from the first steam outlet 11 can be discharged into the heat storage component 30 for heat exchange with the molten salt, and the molten salt circulates between the first storage tank 32 and the second storage tank 33 through the first heat exchange element 31 and the second heat exchange element 34, so that the molten salt constitutes a heat transfer medium to realize the storage of thermal energy. When thermal energy is needed, the molten salt is exchanged with the condensed water to become steam and passed into the external equipment. In this way, when the rotating part 21 is warmed up, the resource utilization of the thermal energy of the steam is guaranteed, and the problem of resource waste can be avoided.

[0027] It should be noted that the external equipment includes a small steam turbine, or the industrial steam discharged from the third steam outlet 344 is used for industrial production.

[0028] like Figure 1As shown, the heat storage component 30 also includes a first pipeline 35 and a second pipeline 36, the first end of the first pipeline 35 is connected to the first steam outlet 11, the second end of the first pipeline 35 is connected to the first steam inlet 211, the first end of the second pipeline 36 is connected to the middle part of the first pipeline 35, the second end of the second pipeline 36 is connected to the second steam inlet 311, and the second pipeline 36 is provided with a first opening and closing valve 37 to control the steam flow between the first steam outlet 11 and the second steam inlet 311. By adopting the above structure, the first end of the first pipeline 35 is connected to the first steam outlet 11, so that part of the steam generated in the furnace body 10 is discharged into the first pipeline 35, and the second end of the first pipeline 35 is connected to the first steam inlet 211, so that the steam in the first pipeline 35 can be discharged into the rotating part 21 to achieve the warm-up operation, and the other part of the steam is discharged into the second pipeline 36, and the steam in the second pipeline 36 is passed into the first heat exchange channel of the first heat exchange element 31 through the second steam inlet 311, so that the steam can exchange heat with the molten salt in the second heat exchange channel, thereby achieving the molten salt. The heating process is carried out, and a first opening and closing valve 37 is arranged on the second pipeline 36. The steam flow between the first steam outlet 11 and the second steam inlet 311 is controlled by the first opening and closing valve 37. When the rotating part 21 is warmed up at the beginning, the first opening and closing valve 37 is opened to allow part of the steam to enter the first heat exchange channel of the first heat exchanger 31 through the second pipeline 36. When the warm-up operation is not performed, the rotating part 21 rotates under the action of steam to generate electricity for the power generation part 22. At this time, the first opening and closing valve 37 is closed, which can improve the utilization rate of thermal energy.

[0029] It should be noted that the middle portion of the first pipeline 35 refers to a position between the first end and the second end of the first pipeline 35 .

[0030] like Figure 1 As shown, the heat storage assembly 30 further includes a third pipeline 38, a fourth steam outlet 213 is provided on the rotating member 21, the fourth steam outlet 213 is connected to the first end of the third pipeline 38, the second end of the third pipeline 38 is connected to the second steam inlet 311, and a second on-off valve 39 is provided on the third pipeline 38 to control the steam flow between the fourth steam outlet 213 and the second steam inlet 311. With the above structure, the fourth steam outlet 213 is provided on the rotating member 21, the fourth steam outlet 213 is connected to the first end of the third pipeline 38, and the second end of the third pipeline 38 is connected to the second steam inlet 311, so that after the rotating member 21 is warmed up by steam, part of the steam after warming up can be discharged into the first heat exchange member 31 through the third pipeline 38, so that the thermal energy utilization rate of the steam can be improved and the waste of thermal energy can be avoided.

[0031] In this embodiment, the first heat exchange element 31 includes a first heat exchanger, which includes a first heat exchange chamber, a first heat exchange pipeline and a second heat exchange pipeline. The first heat exchange pipeline and the second heat exchange pipeline are both arranged in the first heat exchange chamber, the first heat exchange channel is formed in the first heat exchange pipeline, and the second heat exchange channel is formed in the second heat exchange pipeline. The second steam inlet 311 is arranged on the first end of the first heat exchange pipeline, the second end of the second pipeline 36 and the second end of the third pipeline 38 are respectively connected to the first end of the first heat exchange pipeline, the first molten salt inlet 312 is arranged on the first end of the second heat exchange pipeline, the first molten salt outlet 313 is arranged on the second end of the second heat exchange pipeline and is connected to the second storage tank 33, and the second end of the first heat exchange pipeline is connected to the outside. By adopting the above structure, a first heat exchange chamber is set in the first heat exchanger, and the first heat exchange pipeline and the second heat exchange pipeline are both set in the first heat exchange chamber, so that the heat exchange operation between the first heat exchange pipeline and the second heat exchange pipeline can be realized in the first heat exchange chamber, and the channel in the first heat exchange pipeline forms the first heat exchange channel, and the channel in the second heat exchange pipeline forms the second heat exchange channel, so that it is convenient to realize the heat exchange operation between steam and molten salt, and the second end of the second pipeline 36 and the second end of the third pipeline 38 are respectively connected to the first end of the first heat exchange pipeline, so that part of the steam discharged from the furnace body 10 in the second pipeline 36 and part of the steam after warming up in the rotating part 21 are discharged into the first heat exchange part 31, so that the heat exchange operation between steam and molten salt can be realized, which is convenient for realizing thermal energy storage, and then facilitating the subsequent thermal energy utilization.

[0032] It should be noted that a condensate outlet 314 is provided on the first heat exchange element 31 . The condensate outlet 314 is provided on the second end of the first heat exchange pipeline and is connected to the outside, so that the steam after heat exchange can be converted into condensate and discharged through the condensate outlet 314 .

[0033] In this embodiment, the second heat exchange element 34 includes a second heat exchanger, which has a second heat exchange cavity, a third heat exchange pipeline and a fourth heat exchange pipeline. The third heat exchange pipeline and the fourth heat exchange pipeline are both arranged in the second heat exchange cavity, the third heat exchange channel is formed in the third heat exchange pipeline, and the fourth heat exchange channel is formed in the fourth heat exchange pipeline. The first end of the third heat exchange pipeline is connected to the second storage tank 33, the second end of the third heat exchange pipeline is connected to the first storage tank 32, the first end of the fourth heat exchange pipeline is connected to the water source, and the third steam outlet 344 is arranged on the second end of the fourth heat exchange pipeline and is connected to the external equipment. By adopting the above structure, a second heat exchange chamber is set in the second heat exchanger, and the third heat exchange pipeline and the fourth heat exchange pipeline are both set in the second heat exchange chamber, so that the heat exchange operation between the third heat exchange pipeline and the fourth heat exchange pipeline can be realized in the second heat exchange chamber, and the channel in the third heat exchange pipeline forms a third heat exchange channel, and the channel in the fourth heat exchange pipeline forms a fourth heat exchange channel. In this way, it is convenient to realize the heat exchange operation between steam and molten salt, and it is convenient to store the high-temperature molten salt in the second storage tank 33 to realize heat exchange between condensed water and molten salt in the second heat exchange chamber of the second heat exchanger, and then it is convenient to heat the condensed water into steam to realize the utilization of thermal energy, and the generated steam is passed into external equipment to facilitate the subsequent thermal energy utilization.

[0034] like Figure 1 As shown, the rotating member 21 includes a high-pressure cylinder 214, a medium-pressure cylinder 215 and a low-pressure cylinder 216, the first steam inlet 211 and the fourth steam outlet 213 are both arranged on the high-pressure cylinder 214, the fourth steam outlet 213 is respectively connected to the steam inlet of the medium-pressure cylinder 215 and the first end of the third pipeline 38, the steam outlet of the medium-pressure cylinder 215 is connected to the steam inlet of the low-pressure cylinder 216, and the second steam outlet 212 is arranged on the low-pressure cylinder 216. The rotating member 21 adopts the above structure, and the fourth steam outlet 213 is arranged on the high-pressure cylinder 214, and the fourth steam outlet 213 is arranged and connected to the first end of the third pipeline 38, so that part of the steam after warming up the high-pressure cylinder 214 can be discharged into the first heat exchange member 31 through the third pipeline 38, so as to realize the storage of heat energy, and then transfer the heat energy to the molten salt and store it in the second storage tank 33.

[0035] It should be noted that since the temperature of the steam after warming up in the intermediate pressure cylinder 215 and the low pressure cylinder 216 is relatively low, there is no need to discharge the steam into the first heat exchange element 31 for heat exchange, and the second steam outlet 212 on the low pressure cylinder 216 is connected to the first water inlet 12, so as to facilitate the recycling of steam.

[0036] like Figure 1As shown, a condensation mechanism 40 is provided between the second steam outlet 212 and the first water inlet 12, so that the steam of the second steam outlet 212 is condensed into water and passed into the first water inlet 12. With the above structure, by providing the condensation mechanism 40 between the second steam outlet 212 and the first water inlet 12, the steam discharged from the second steam outlet 212 is condensed into water under the action of the condensation mechanism 40 and flows back into the furnace body 10 through the first water inlet 12, so that the recycling of water resources can be realized.

[0037] like Figure 1 As shown, the condensing mechanism 40 includes a condenser 41, a deaerator 42 and a pump body 43. The second steam outlet 212 is connected to the inlet of the condenser 41, the outlet of the condenser 41 is connected to the inlet of the deaerator 42, the outlet of the deaerator 42 is connected to the inlet of the pump body 43, and the outlet of the pump body 43 is connected to the first water inlet 12. With the above-mentioned condensing mechanism 40, the steam discharged from the second steam outlet 212 enters the condenser 41, and the steam is condensed into condensed water. The outlet of the condenser 41 is connected to the inlet of the deaerator 42, so that the condensed water can be deoxygenated, and under the action of the pump body 43, the condensed water can be pumped into the furnace body 10 through the first water inlet 12, so as to realize the circulation of water resources and avoid waste of resources.

[0038] like Figure 1 As shown, a superheater 50 is provided between the first steam outlet 11 and the first steam inlet 211. The superheater 50 is used to heat the steam discharged from the first steam outlet 11, so as to increase the temperature of the steam.

[0039] In this embodiment, the furnace body 10 includes a waste heat boiler, a gas turbine and a gas generator, the gas turbine has a fuel inlet and an air inlet, the gas turbine is connected to the gas generator by driving, the waste heat boiler has a fuel chamber and a water storage chamber, the flue gas outlet of the gas turbine is connected to the fuel chamber, and the first steam outlet 11 and the first water inlet 12 are both connected to the water storage chamber. With the above structure, by using the fuel inlet to introduce fuel into the gas turbine, and by using the air inlet to introduce air into the gas turbine, the fuel is burned in the gas turbine, thereby realizing the rotation of the gas turbine and driving the gas generator to generate electricity, and the flue gas outlet of the gas turbine is connected to the fuel chamber, and the first steam outlet 11 and the first water inlet 12 are both connected to the water storage chamber, so that the fuel chamber is used to heat the water in the water storage chamber.

[0040] It should be noted that the superheater 50 utilizes the high-temperature flue gas generated by the gas turbine to heat the steam in the superheater 50 .

[0041] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0042] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0043] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0044] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0045] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A gas-steam combined cycle unit, characterized in that: The gas-steam combined cycle unit comprises: A furnace body (10) having a first steam outlet (11) and a first water inlet (12); A power generation assembly (20), comprising a rotating member (21) and a power generation member (22), wherein the rotating member (21) has a first steam inlet (211) and a second steam outlet (212), the first steam outlet (11) is connected to the first steam inlet (211), the second steam outlet (212) is connected to the first water inlet (12), and the rotating member (21) is drivingly connected to the power generation member (22) to control the power generation member (22) to generate electricity; A heat storage component (30) comprises a first heat exchange element (31), a first storage tank (32), a second storage tank (33) and a second heat exchange element (34), wherein the first heat exchange element (31) comprises a first heat exchange channel and a second heat exchange channel for exchanging heat with each other, the first heat exchange channel comprises a second steam inlet (311), the second heat exchange channel comprises a first molten salt inlet (312) and a first molten salt outlet (313), the second steam inlet (311) is connected to the first steam outlet (11), the first molten salt inlet (312) is connected to the first storage tank (32), the first molten salt outlet (313) is connected to the The second storage tank (33) is connected, the second heat exchange element (34) has a third heat exchange channel and a fourth heat exchange channel for mutual heat exchange, the third heat exchange channel has a second molten salt inlet (341) and a second molten salt outlet (342), the fourth heat exchange channel has a second water inlet (343) and a third steam outlet (344), the second molten salt inlet (341) is connected to the second storage tank (33), the second molten salt outlet (342) is connected to the first storage tank (32), the second water inlet (343) is connected to a water source, and the third steam outlet (344) is connected to an external device.

2. The gas-steam combined cycle unit according to claim 1, characterized in that: The heat storage component (30) further comprises a first pipeline (35) and a second pipeline (36); a first end of the first pipeline (35) is connected to the first steam outlet (11); a second end of the first pipeline (35) is connected to the first steam inlet (211); a first end of the second pipeline (36) is connected to a middle portion of the first pipeline (35); a second end of the second pipeline (36) is connected to the second steam inlet (311); and a first on-off valve (37) is provided on the second pipeline (36) to control the flow of steam between the first steam outlet (11) and the second steam inlet (311).

3. The gas-steam combined cycle unit according to claim 2, characterized in that: The heat storage component (30) further comprises a third pipeline (38); a fourth steam outlet (213) is provided on the rotating member (21); the fourth steam outlet (213) is connected to a first end of the third pipeline (38); a second end of the third pipeline (38) is connected to the second steam inlet (311); and a second on-off valve (39) is provided on the third pipeline (38) to control the flow of steam between the fourth steam outlet (213) and the second steam inlet (311).

4. The gas-steam combined cycle unit according to claim 3, characterized in that: The first heat exchange element (31) includes a first heat exchanger, which includes a first heat exchange chamber, a first heat exchange pipeline and a second heat exchange pipeline. The first heat exchange pipeline and the second heat exchange pipeline are both arranged in the first heat exchange chamber. The first heat exchange channel is formed in the first heat exchange pipeline, and the second heat exchange channel is formed in the second heat exchange pipeline. The second steam inlet (311) is arranged on the first end of the first heat exchange pipeline, and the second end of the second pipeline (36) and the second end of the third pipeline (38) are respectively connected to the first end of the first heat exchange pipeline. The first molten salt inlet (312) is arranged on the first end of the second heat exchange pipeline. The first molten salt outlet (313) is arranged on the second end of the second heat exchange pipeline and is connected to the second storage tank (33). The second end of the first heat exchange pipeline is connected to the outside.

5. The gas-steam combined cycle unit according to claim 3, characterized in that: The second heat exchange element (34) includes a second heat exchanger, which has a second heat exchange cavity, a third heat exchange pipeline and a fourth heat exchange pipeline. The third heat exchange pipeline and the fourth heat exchange pipeline are both arranged in the second heat exchange cavity, the third heat exchange channel is formed in the third heat exchange pipeline, and the fourth heat exchange channel is formed in the fourth heat exchange pipeline. The first end of the third heat exchange pipeline is connected to the second storage tank (33), the second end of the third heat exchange pipeline is connected to the first storage tank (32), the first end of the fourth heat exchange pipeline is connected to the water source, and the third steam outlet (344) is arranged on the second end of the fourth heat exchange pipeline and is connected to the external device.

6. The gas-steam combined cycle unit according to claim 3, characterized in that: The rotating member (21) comprises a high-pressure cylinder (214), a medium-pressure cylinder (215) and a low-pressure cylinder (216); the first steam inlet (211) and the fourth steam outlet (213) are both arranged on the high-pressure cylinder (214); the fourth steam outlet (213) is respectively connected to the steam inlet of the medium-pressure cylinder (215) and the first end of the third pipeline (38); the steam outlet of the medium-pressure cylinder (215) is connected to the steam inlet of the low-pressure cylinder (216); and the second steam outlet (212) is arranged on the low-pressure cylinder (216).

7. The gas-steam combined cycle unit according to claim 1, characterized in that: A condensation mechanism (40) is provided between the second steam outlet (212) and the first water inlet (12) so that the steam at the second steam outlet (212) is condensed into water and passed into the first water inlet (12).

8. The gas-steam combined cycle unit according to claim 7, characterized in that: The condensing mechanism (40) includes a condenser (41), a deaerator (42) and a pump body (43); the second steam outlet (212) is connected to the inlet of the condenser (41); the outlet of the condenser (41) is connected to the inlet of the deaerator (42); the outlet of the deaerator (42) is connected to the inlet of the pump body (43); and the outlet of the pump body (43) is connected to the first water inlet (12).

9. The gas-steam combined cycle unit according to claim 1, characterized in that: A superheater (50) is provided between the first steam outlet (11) and the first steam inlet (211).

10. The gas-steam combined cycle unit according to claim 1, characterized in that: The furnace body (10) comprises a waste heat boiler, a gas turbine and a gas turbine generator, the gas turbine having a fuel inlet and an air inlet, the gas turbine being drivingly connected to the gas turbine generator, the waste heat boiler having a fuel chamber and a water storage chamber, the flue gas outlet of the gas turbine being connected to the fuel chamber, and the first steam outlet (11) and the first water inlet (12) being connected to the water storage chamber.

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