Heating systems for heat and cold separation in thermal power plants

Abstract

This application discloses a heating system for heat and cold separation in a thermal power plant, including a vortex tube for separating steam received at the input end. Steam with a temperature higher than a temperature threshold is output from a first output end, while steam with a temperature lower than or equal to the temperature threshold is output from a second output end. A first cooling heat exchanger, connected to the second output end of the vortex tube, is used to cool the steam flowing through it using the steam with a temperature lower than or equal to the temperature threshold. A second cooling heat exchanger and a supply device are also included. The second cooling heat exchanger is used to heat the steam flowing through it, and the supply device is used to supply external heat energy using the steam flowing through the first cooling heat exchanger. By separating the steam into hot and cold parts through the vortex tube, efficient energy utilization is achieved. Furthermore, the combination of the first and second cooling heat exchangers effectively utilizes low-temperature steam for heat exchange, improving energy efficiency and reducing energy consumption.

Description

Technical Field

[0001] This application relates to the field of heating, and more specifically, to a heating system for heat and cold separation in a thermal power plant. Background Technology

[0002] With the escalating energy crisis and global warming, the development and utilization of clean and efficient energy are receiving increasing attention. To achieve this goal, combined heat and power (CHP) systems utilizing steam circulation have been widely applied in industrial production. Steam circulation devices use high-pressure steam to generate the kinetic energy that drives a compressor. This compressor compresses the low-pressure steam it draws in, increasing its pressure before sending it back into the steam circulation system. By continuously recycling the heat energy of the steam, efficient steam utilization is achieved. In practical applications, the steam circulation system also needs to recover the heat generated by the compressor and reuse it to heat the condensate produced during the production process, reducing heat waste. Therefore, improving the utilization rate of the heat energy generated in the steam circulation loop is crucial for achieving high-efficiency operation of the steam circulation system.

[0003] Traditional steam circulation systems typically use gas pressure regulation to lower the gas temperature for refrigeration. However, this method often proves ineffective under high load conditions. This not only leads to significant energy consumption and increased operating costs, but also, due to low refrigeration efficiency, the system often takes longer to reach the required cooling temperature, thus extending the cooling time and impacting the overall performance of the refrigeration system and the user experience. Summary of the Invention

[0004] This application provides a heating system for separating heat and cold in a thermal power plant.

[0005] According to one aspect of the embodiments of this application, a heating system for heat and cold separation in a thermal power plant is provided, including a vortex tube, which includes an input end, a first output end, and a second output end. The vortex tube is used to separate the steam received at the input end, outputting steam with a temperature greater than a temperature threshold from the first output end and steam with a temperature less than or equal to the temperature threshold from the second output end; a first cooling heat exchanger, which is connected to the second output end of the vortex tube, and is used to cool the steam flowing through the first cooling heat exchanger using the steam with a temperature less than or equal to the temperature threshold; a second cooling heat exchanger and a supply device, which are connected in sequence. The second cooling heat exchanger is used to heat the steam flowing through the first cooling heat exchanger using the steam flowing through the first cooling heat exchanger, and the supply device is used to supply heat energy to the outside using the steam flowing through the first cooling heat exchanger.

[0006] In one embodiment of this application, the system further includes a steam extraction ejector device, which is connected to the input end of the vortex tube and is used to provide steam to the input end of the vortex tube; the second cooling heat exchanger includes a second circulation pipeline and a second heat exchange pipeline, the first end of the second circulation pipeline is connected to the first output end of the vortex tube, and the second end of the second circulation pipeline is connected to the steam extraction ejector device, wherein the steam extraction ejector device, the second cooling heat exchanger, and the vortex tube constitute a first steam cycle.

[0007] In one embodiment of this application, the first cooling heat exchanger includes a first circulation pipeline and a first heat exchange pipeline. The first end of the first heat exchange pipeline is connected to the second output end of the vortex tube, the first end of the first circulation pipeline is connected to the first end of the second heat exchange pipeline, and the second end of the first circulation pipeline is connected to the supply device. The first heat exchange pipeline is used to exchange temperature with the first circulation pipeline. The first cooling heat exchanger, the second cooling heat exchanger, and the supply device constitute a second steam cycle.

[0008] In one embodiment of this application, the system further includes a condenser connected to the second end of the first heat exchange pipeline for recovering the thermal energy of the steam transmitted at the second end of the first heat exchange pipeline.

[0009] In one embodiment of this application, the system further includes a hot water storage tank, which is connected to the first output end of the vortex tube and is used to receive steam with a temperature greater than a temperature threshold. The hot water storage tank is also connected to a supply device through two separate pathways, wherein the hot water storage tank and the supply device constitute a third steam cycle.

[0010] In one embodiment of this application, the system further includes a first circulation pump, which is installed on a passage connecting the hot water storage tank and the supply device, for driving steam circulation.

[0011] In one embodiment of this application, the system further includes a first valve disposed on a passage connecting the hot water storage tank and the supply device, for cutting off the third steam circulation when closed.

[0012] In one embodiment of this application, the system further includes a second valve, the first end of which is connected to the first end of the second cooling heat exchanger, and the second end of which is connected to the second end of the second cooling heat exchanger, for bypassing the second cooling heat exchanger when closed.

[0013] In one embodiment of this application, the system further includes a waste steam heat recovery heat exchanger, which includes a third circulation pipeline. The first end of the third circulation pipeline is connected to the steam extraction ejector device, and the second end of the third circulation pipeline is connected to the condenser, for transferring the waste steam generated by the steam extraction ejector device to the condenser for recovery.

[0014] In one embodiment of this application, the system further includes a third valve, the first end of which is connected to the first end of the third circulation pipeline, and the second end of which is connected to the second end of the third circulation pipeline, for bypassing the exhaust steam heat recovery heat exchanger when closed.

[0015] The aforementioned heating system for thermal power plants, employing a vortex tube design, separates steam into hot and cold components, achieving highly efficient energy utilization. By using the vortex tube, thermal and cold energy can be effectively separated and utilized, avoiding energy waste caused by directly discharging cold steam. Hot steam can be further used to heat water in thermal storage buffer tanks or directly supplied to heat users, while cold steam can be used to cool the return water of the heating network or supplied to cold users, improving the overall energy utilization efficiency of the system. The first cooling heat exchanger effectively utilizes the cooling energy generated by the vortex tube to supply cold energy to users or assist in the condensation process, reducing the operating load of cooling towers and other cooling devices, lowering the temperature of the cooling water, and further improving the waste steam recovery efficiency and the overall thermal economy of the system. Simultaneously, by utilizing the thermal and cold energy of the steam in a cascade manner, more efficient energy utilization is achieved. The design of the second cooling heat exchanger and supply device enables multi-level utilization of steam energy, improving the overall thermal efficiency of the system. After the cold steam releases its cold energy in the first cooling heat exchanger, its residual heat energy can be effectively recovered in the second cooling heat exchanger to provide heat energy to the outside, avoiding direct heat emission and energy waste. In summary, by separating steam into cold and hot parts through vortex tubes, high-efficiency energy utilization is achieved. Combined with the first and second cooling heat exchangers, low-temperature steam can be effectively used for heat exchange, improving energy utilization efficiency, reducing energy consumption, and realizing multiple cooling methods. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a structural block diagram of a heating system for heat and cold separation in a thermal power plant, according to an embodiment of this application.

[0019] Figure 2 This is a schematic diagram of a heating system for heat and cold separation in a thermal power plant, according to an embodiment of this application.

[0020] Explanation of reference numerals in the attached figures:

[0021] 10-Vortex tube, 20-First cooling heat exchanger, 30-Second cooling heat exchanger, 40-Supply device, 50-Steam extraction ejector device, 60-Condenser, 70-Hot water storage tank, 81-First circulating pump, 82-First valve, 83-Second valve, 90-Exhaust steam heat recovery heat exchanger, 84-Third valve. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0023] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data used in this way can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0025] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0026] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0027] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. Furthermore, in the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if there is transmission of electrical signals or data between the connected objects.

[0028] This embodiment provides a heating system for heat and cold separation in a thermal power plant. Figure 1 This is a structural diagram of an optional heating system for heat and cold separation in a thermal power plant according to an embodiment of this application, including: a vortex tube 10, a first cooling heat exchanger 20, a second cooling heat exchanger 30, and a supply device 40, wherein:

[0029] The vortex tube 10 includes an input end, a first output end, and a second output end. The vortex tube 10 is used to separate the steam received at the input end, outputting steam with a temperature greater than a temperature threshold from the first output end, and outputting steam with a temperature less than or equal to the temperature threshold from the second output end.

[0030] Specifically, the vortex tube 10 is a thermal energy separation device without moving parts. Its internal design generates a high-speed rotating vortex after high-pressure gas enters. During the rotation, the gas is separated into two streams: a hot stream with a higher temperature and a cold stream with a lower temperature. The hot stream is discharged from the first output end (hot end outlet), while the cold stream is discharged from the second output end (cold end outlet). In this invention, the vortex tube 10 receives steam from the ejector and, utilizing the pressure energy of the steam, separates it into hot steam with a temperature above a certain threshold and cold steam with a temperature below or equal to that threshold through an internal rotating flow separation process.

[0031] The first cooling heat exchanger 20 is connected to the second output end of the vortex tube 10 and is used to cool the steam flowing through the first cooling heat exchanger 20 using steam with a temperature less than or equal to a temperature threshold.

[0032] Specifically, the first cooling heat exchanger 20 is connected to the second output end (cold end outlet) of the vortex tube 10. Its function is to use the cold steam generated by the vortex tube 10 to cool the return water of the heating network flowing through the heat exchanger, so as to supply the cooling users or assist the operation of the condenser 60. The design of the heat exchanger enables heat exchange between the cold steam and the return water of the heating network. The cold steam releases heat and lowers its temperature, while the return water of the heating network absorbs heat and raises its temperature, achieving cascaded utilization of energy.

[0033] The second cooling heat exchanger 30, the first cooling heat exchanger 20, and the supply device 40 are connected in sequence. The second cooling heat exchanger 30 is used to heat the steam flowing through the first cooling heat exchanger 20. The supply device 40 is used to supply heat energy to the outside using the steam flowing through the first cooling heat exchanger 20.

[0034] Specifically, the second cooling heat exchanger 30 is sequentially connected to the first cooling heat exchanger 20 and the supply device 40. Its function is to utilize the steam pre-cooled by the first cooling heat exchanger 20 to further heat the return water or other fluids flowing through the second cooling heat exchanger 30, thereby improving the efficiency of heat energy utilization. The supply device 40 is used to supply the heated fluid to external heat users to meet their needs. The entire process achieves heat transfer and distribution through pipe connections and valve control between the heat exchangers.

[0035] In this embodiment, the steam is separated into hot and cold parts by the vortex tube 10, achieving efficient energy utilization. By using the vortex tube 10, thermal and cold energy can be effectively separated and utilized, avoiding energy waste caused by directly discharging cold steam. The hot steam can be further used to heat the water in the thermal storage buffer tank or directly supplied to heat users, while the cold steam can be used to cool the return water of the heating network or supplied to cold users, improving the overall energy utilization efficiency of the system. Through the first cooling heat exchanger 20, the cold energy generated by the vortex tube 10 can be effectively utilized to supply cold energy to users or assist the condensation process, reducing the operating load of cooling devices such as cooling towers, lowering the temperature of cooling water, and further improving the exhaust steam recovery efficiency and the overall thermal economy of the system. At the same time, by utilizing the thermal and cold energy of steam in a cascade manner, more efficient energy utilization is achieved. The design of the second cooling heat exchanger 30 and the supply device 40 realizes multi-level utilization of steam energy, improving the thermal efficiency of the entire system. After the cold steam releases its cold energy in the first cooling heat exchanger 20, its residual heat energy can be effectively recovered in the second cooling heat exchanger 30 to provide heat energy to the outside, avoiding direct heat emission and energy waste. In summary, by separating the steam into cold and hot parts through the vortex tube 10, efficient energy utilization is achieved. Combined with the first cooling heat exchanger 20 and the second cooling heat exchanger 30, low-temperature steam can be effectively used for heat exchange, improving energy utilization efficiency, reducing energy consumption, and realizing multiple refrigeration.

[0036] In one embodiment, please see [link to embodiment]. Figure 1 The heating system for heat and cold separation in a thermal power plant also includes a steam extraction ejector device 50. The steam extraction ejector device 50 is connected to the input end of the vortex tube 10 and is used to provide steam to the input end of the vortex tube 10.

[0037] Among them, the steam extraction ejector device 50 is a device that uses the pressure energy of steam to eject steam into the vortex tube 10 for separation.

[0038] The second cooling heat exchanger 30 includes a second circulation pipeline and a second heat exchange pipeline. The first end of the second circulation pipeline is connected to the first output end of the vortex tube 10, and the second end of the second circulation pipeline is connected to the steam extraction ejector device 50.

[0039] The first steam cycle is formed by the steam extraction ejector 50, the second cooling heat exchanger 30, and the vortex tube 10.

[0040] The second cooling heat exchanger 30, through its internal second circulation pipe and second heat exchange pipe, is connected to the first output end (hot end outlet) of the vortex tube 10. It absorbs heat from the hot steam in the vortex tube 10 and transfers this heat to other fluids, such as water in a heating network, thereby achieving further utilization of thermal energy. The second circulation pipe is responsible for the inflow and outflow of hot steam, while the second heat exchange pipe is used for heat exchange with other fluids. The second cooling heat exchanger 30, together with the steam extraction ejector 50 and the vortex tube 10, constitute the first steam cycle, enabling the energy of the steam to be utilized in stages and improving the overall thermal efficiency of the system.

[0041] The first steam cycle involves obtaining steam from the steam extraction ejector device 50, which then ejects the steam into the vortex tube 10. After energy separation in the vortex tube 10, the hot steam enters the second cooling heat exchanger 30 for heat exchange, releasing heat before returning to the steam extraction ejector device 50. The cold steam then enters the first cooling heat exchanger 20 for cold exchange. This entire cycle achieves efficient utilization and recovery of steam energy, including the extraction of thermal energy and the utilization of cold energy.

[0042] In this embodiment, the extraction steam ejector 50 effectively utilizes the energy of high-pressure steam, avoiding the additional energy consumption and complexity associated with using equipment such as electric pumps, simplifying the system structure, and improving the system's operating efficiency and economy. Furthermore, the extraction steam ejector 50 can quickly respond to load changes, improving the system's flexibility. The second cooling heat exchanger 30 fully utilizes the heat from the hot steam separated by the vortex tube 10, reducing energy waste and improving the system's energy utilization economy and environmental friendliness. Simultaneously, it provides a stable heat supply to heat users, improving the system's heat supply capacity and service quality.

[0043] In one embodiment, please see [link to embodiment]. Figure 1 The first cooling heat exchanger 20 includes a first circulation pipeline and a first heat exchange pipeline. The first end of the first heat exchange pipeline is connected to the second output end of the vortex tube 10. The first end of the first circulation pipeline is connected to the first end of the second heat exchange pipeline. The second end of the first circulation pipeline is connected to the supply device 40. The first heat exchange pipeline is used to exchange temperature with the first circulation pipeline. The first cooling heat exchanger 20, the second cooling heat exchanger 30, and the supply device 40 constitute a second steam cycle.

[0044] Specifically, the first cooling heat exchanger 20 is a key component of the system used for the cooling process. It includes a first circulation pipe and a first heat exchange pipe. The first heat exchange pipe is connected to the second output end (i.e., the cold end outlet) of the vortex tube 10, receiving the cold steam separated by the vortex tube 10. The first circulation pipe is used for the circulation of fluids (such as return water from the heating network), with its first end connected to the first end of the second heat exchange pipe and its second end connected to the external supply device 40. In the first cooling heat exchanger 20, the cold steam exchanges heat with the fluid in the circulation pipe through the first heat exchange pipe, thereby cooling the fluid. This design allows the cold energy of the cold steam to be effectively recovered and utilized.

[0045] Specifically, in the second steam cycle, the second cooling heat exchanger 30 is connected to the first circulation pipe of the first cooling heat exchanger 20 through its internal second heat exchange pipe. It receives the fluid pre-cooled by the first cooling heat exchanger 20 and further heats it for use by the heat user. The design of the second cooling heat exchanger 30 allows the pre-cooled fluid to absorb heat again before entering the final supply device 40, improving the efficiency of thermal energy utilization. The second steam cycle involves a continuous energy transfer process between the first cooling heat exchanger 20, the second cooling heat exchanger 30, and the supply device 40. In this cycle, the cold steam separated by the vortex tube 10 exchanges heat with the fluid in the first circulation pipe in the first cooling heat exchanger 20, reducing the fluid temperature. Subsequently, the cooled fluid absorbs heat again in the second cooling heat exchanger 30 and is finally delivered to the heat user through the supply device 40. The design of the second steam cycle focuses on the cold energy recovery of the cold steam and the cascade utilization of the fluid's heat, effectively improving the overall thermal efficiency of the system.

[0046] In this embodiment, the first cooling heat exchanger 20 not only effectively recovers the cold energy from the cold steam, but also provides cooling energy to the system through heat exchange with the circulating fluid, meeting the needs of cold users or assisting the operation of the condenser 60. This cascaded utilization of cold and heat energy not only improves the overall thermal efficiency of the system, but also reduces dependence on cooling facilities such as cooling towers, thereby reducing the system's operating costs and environmental impact. The second steam cycle utilizes the cold energy of the cold steam and the waste heat of the pre-cooled fluid in a cascaded manner, achieving multi-level energy utilization, reducing energy waste, and improving the system's thermal efficiency and economic benefits. In addition, the second steam cycle enhances the system's flexibility, enabling it to adapt to different cooling and heating load demands, which is conducive to the stable operation of the system and the improvement of its market competitiveness.

[0047] In one embodiment, such as Figure 2 As shown, the system also includes a condenser 60, which is connected to the second end of the first heat exchange pipeline and is used to recover the heat energy of the steam transmitted from the second end of the first heat exchange pipeline.

[0048] Specifically, the main function of the condenser 60 is to condense the exhaust steam (hot steam) from the steam turbine into water through heat exchange with circulating cooling water, while simultaneously recovering the steam's thermal energy. The condenser 60 is connected to the second end of the first heat exchange pipeline, receiving steam that has been cooled by the first cooling heat exchanger 20. This steam loses most of its thermal energy within the condenser 60, thus allowing its temperature to be further reduced until it condenses into water.

[0049] In this embodiment, the application of the condenser 60 in the system can effectively recover the heat energy of the steam, reduce the direct emission of heat, and improve energy utilization efficiency.

[0050] In one embodiment, please see [link to embodiment]. Figure 2 The system also includes a hot water storage tank 70.

[0051] The hot water storage tank 70 is connected to the first output end of the vortex tube 10 and is used to receive steam with a temperature greater than the temperature threshold.

[0052] The hot water storage tank 70 is also connected to the supply device 40 through two separate passages.

[0053] The hot water storage tank 70 and the supply device 40 constitute the third steam cycle.

[0054] Specifically, the hot water storage tank 70 plays a dual role in this technical solution, serving as both energy storage and heat supply. It is directly connected to the first output end (hot end outlet) of the vortex tube 10, used to receive and store steam with a temperature higher than a preset temperature threshold. This high-temperature steam exchanges heat with the water in the storage tank 70, heating the water to the required temperature to form hot water. The capacity design of the hot water storage tank 70 fully considers the system's maximum heat load and heat recovery capacity, enabling it to provide a stable heat source during peak heat load periods and store excess heat energy during off-peak periods. Two pathways connecting the hot water storage tank 70 and the supply device 40 ensure flexible hot water supply. One pathway directly delivers hot water from the storage tank 70 to the supply device 40 to meet immediate heat demand; the other pathway connects the storage tank 70 to the second cooling heat exchanger 30, where the hot water is further heated before being delivered to the supply device 40 to meet higher temperature heat demands. The hot water storage tank 70 can be used for cross-seasonal heat storage.

[0055] Specifically, the third steam cycle is an independent energy flow path formed between the hot water storage tank 70 and the supply device 40. In this cycle, the hot water storage tank 70 receives high-temperature steam from the vortex tube 10. After heat exchange between the steam and the water in the hot water storage tank 70, the water is heated to a higher temperature. Subsequently, this hot water is directly sent to the supply device 40 through one of two paths for use by external heat users. If it is sent through the second path, the hot water will first pass through the second cooling heat exchanger 30 for further heating before being sent to the supply device 40 to meet higher heat energy demands. This cycle mode ensures efficient utilization and storage of heat energy, while also providing flexible heat source selection for heat users with different temperature requirements.

[0056] For example, the hot water storage tank 70 is generally cylindrical, cuboid, or inverted pyramid, with a non-pointed inverted pyramid preferred. The design size depends on the unit scale, steam extraction volume and parameters, exhaust steam volume and temperature, local average air temperature, and tank insulation conditions. It should generally cover the entire heating season or peak heating season. At the end of the heating season or peak heating season, the water intake temperature is higher than 30°C. The choice of the end of the heating season or peak heating season depends on the local heat price, the total scale of the local thermal power plant, and cost-benefit analysis.

[0057] In this embodiment, the hot water storage tank 70 provides a reliable thermal energy reserve for the system, enhancing its ability to adapt to heat loads. By storing the heat from high-temperature steam, it can respond quickly during peak heat load periods, avoiding energy shortages or system instability caused by excessive instantaneous heat demand. Simultaneously, as an energy storage unit, the hot water storage tank 70 can store excess heat energy during off-peak heat load periods, reducing energy waste and improving energy utilization efficiency.

[0058] In one embodiment, please see [link to embodiment]. Figure 2The system further includes a first circulation pump 81. The first circulation pump 81 is installed on a passage connecting the hot water storage tank 70 and the supply device 40, and is used to drive steam circulation.

[0059] Specifically, the first circulation pump 81 is a key device in the system for maintaining hot water circulation. It is installed on a passage connecting the hot water storage tank 70 and the supply device 40. Its main function is to drive the circulation of hot water between the hot water storage tank 70 and the supply device 40.

[0060] In this embodiment, the first circulation pump 81 ensures a smooth supply of hot water and improves the system's heat energy distribution efficiency.

[0061] In one embodiment, please see [link to embodiment]. Figure 2 The system further includes a first valve 82. The first valve 82 is located on a passage connecting the hot water storage tank 70 and the supply device 40, and is used to cut off the third steam circulation when closed.

[0062] Specifically, the first valve 82 is located on the communication path between the hot water storage tank 70 and the supply device 40, and is used to control the opening and closing of the third steam cycle. When closed, the first valve 82 cuts off the path for hot water to be supplied from the hot water storage tank 70 to the supply device 40, which means that the third steam cycle is interrupted and hot water cannot flow through this path. The opening and closing state of the first valve 82 can be adjusted according to changes in the system operating mode or external heat demand.

[0063] In this embodiment, the first valve 82 provides the system with the ability to switch operating modes. When hot water is not needed to be directly supplied through the hot water storage tank 70, the first valve 82 can be closed, avoiding unnecessary energy consumption. Furthermore, by controlling the first valve 82, the system can respond quickly during maintenance or fault conditions, protecting the system from damage and enhancing its safety and reliability.

[0064] In one embodiment, please see [link to embodiment]. Figure 2 The system further includes a second valve 83. The first end of the second valve 83 is connected to the first end of the second cooling heat exchanger 30, and the second end of the second valve 83 is connected to the second end of the second cooling heat exchanger 30, for bypassing the second cooling heat exchanger 30 when closed.

[0065] Specifically, the connection between the second valve 83 and the second cooling heat exchanger 30 is provided with a bypass. This bypass allows fluid to be transported directly from one end of the heat exchanger to the other, bypassing the second cooling heat exchanger 30 when needed. When the second valve 83 is closed, the fluid does not flow through the second cooling heat exchanger 30 but is transported directly through the bypass of the second valve 83. This design allows the system to flexibly adjust the operating status of the heat exchanger according to actual needs.

[0066] In this embodiment, the second valve 83 improves the system's operational flexibility. When the second cooling heat exchanger 30 requires maintenance or the system does not need to further increase the hot water temperature through this heat exchanger, the second valve 83 can be closed to bypass the heat exchanger, avoiding unnecessary energy loss and complex system operation. Simultaneously, this design also improves the system's adaptability to different operating conditions, enhancing stable operation and ease of maintenance.

[0067] In one embodiment, please see [link to embodiment]. Figure 2 The system also includes a waste steam heat recovery heat exchanger 90. The waste steam heat recovery heat exchanger 90 includes a third circulation pipeline, the first end of which is connected to the steam extraction ejector device 50, and the second end of which is connected to the condenser 60, for transferring the waste steam generated by the steam extraction ejector device 50 to the condenser 60 for recovery.

[0068] Specifically, the waste steam heat recovery heat exchanger 90 is a device used to recover the heat from the waste steam generated by the steam extraction ejector 50. It includes a third circulation pipeline, one end of which is connected to the steam extraction ejector 50, and the other end to the condenser 60. The waste steam is ejected in the steam extraction ejector 50 and transferred to the waste steam heat recovery heat exchanger 90, where its heat is recovered. The waste steam is then sent to the condenser 60 for further cooling and condensation. This process achieves efficient utilization of waste steam heat and reduces energy waste.

[0069] In this embodiment, the installation of the waste steam heat recovery heat exchanger 90 improves the system's heat recovery efficiency. By recovering and reusing the heat energy in the waste steam, the system's energy consumption is reduced, and operating costs are lowered. Furthermore, by transferring the waste steam heat to the condenser 60, the cooling efficiency of the condenser 60 is improved, reducing dependence on cooling water. This is of great significance for energy conservation, emission reduction, and improving the system's thermal economy.

[0070] In one embodiment, please see [link to embodiment]. Figure 2 The system also includes a third valve 84. The first end of the third valve 84 is connected to the first end of the third circulation pipeline, and the second end of the third valve 84 is connected to the second end of the third circulation pipeline, for bypassing the exhaust steam heat recovery heat exchanger 90 when closed.

[0071] Specifically, the third valve 84 is located in the communication passage between the waste steam heat recovery heat exchanger 90 and the extraction steam ejector 50 and condenser 60. Its design purpose is to bypass the waste steam heat recovery heat exchanger 90 when needed. When the third valve 84 is closed, the waste steam does not flow through the waste steam heat recovery heat exchanger 90, but flows directly from one end of the heat exchanger to the other, ultimately entering the condenser 60. This design allows the system to flexibly adjust the flow path of the waste steam according to external conditions or operational requirements, improving the system's operational flexibility.

[0072] In this embodiment, the third valve 84 provides the system with control over the waste steam heat recovery heat exchanger 90. When the heat exchanger requires maintenance or the system does not need to recover waste steam heat energy, the third valve 84 can be closed, and the waste steam can be directly sent to the condenser 60. This avoids unnecessary operation of the heat exchanger, reduces system maintenance costs and operational complexity, and enhances the system's stable operation and thermal economy. This design also improves the system's adaptability to different operating conditions, ensuring efficient and flexible operation.

[0073] In the description of this specification, references to terms such as "some embodiments," "other embodiments," and "ideal embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0074] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0075] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this application should be included within the protection scope of this application.

Claims

1. A heating system for heat and cold separation in a thermal power plant, characterized in that, include: A vortex tube, comprising an input end, a first output end, and a second output end, is used to separate the steam received at the input end, outputting steam with a temperature greater than a temperature threshold from the first output end, and outputting steam with a temperature less than or equal to the temperature threshold from the second output end. The first cooling heat exchanger is connected to the second output end of the vortex tube and is used to cool the steam flowing through the first cooling heat exchanger using steam with a temperature less than or equal to the temperature threshold. The second cooling heat exchanger and the supply device are connected in sequence. The second cooling heat exchanger is used to heat the steam flowing through the first cooling heat exchanger. The supply device is used to supply heat energy to the outside using the steam flowing through the first cooling heat exchanger. A steam extraction ejector device is connected to the input end of the vortex tube and is used to provide steam to the input end of the vortex tube. The second cooling heat exchanger includes a second circulation pipeline and a second heat exchange pipeline. The first end of the second circulation pipeline is connected to the first output end of the vortex tube, and the second end of the second circulation pipeline is connected to the steam extraction ejector. The steam extraction ejector, the second cooling heat exchanger, and the vortex tube constitute a first steam cycle. The first cooling heat exchanger includes a first circulation pipe and a first heat exchange pipe. The first end of the first heat exchange pipe is connected to the second output end of the vortex tube. The first end of the first circulation pipe is connected to the first end of the second heat exchange pipe. The second end of the first circulation pipe is connected to the supply device. The first heat exchange pipe is used to exchange temperature with the first circulation pipe. The first cooling heat exchanger, the second cooling heat exchanger, and the supply device constitute a second steam cycle. A condenser, which is connected to the second end of the first heat exchange pipeline, is used to recover the heat energy of the steam transmitted from the second end of the first heat exchange pipeline. A hot water storage tank, which is connected to the first output end of the vortex tube, is used to receive steam with a temperature greater than a temperature threshold. The hot water storage tank is also connected to the supply device through two separate pathways, wherein the hot water storage tank and the supply device constitute a third steam cycle; The second valve, with its first end connected to the first end of the second cooling heat exchanger and its second end connected to the second end of the second cooling heat exchanger, is used to bypass the second cooling heat exchanger when closed.

2. The heating system for heat and cold separation in a thermal power plant according to claim 1, characterized in that, The system also includes: A first circulation pump is installed on a passage connecting the hot water storage tank and the supply device to drive steam circulation.

3. The heating system for heat and cold separation in a thermal power plant according to claim 1, characterized in that, The system also includes: The first valve is installed on a passage connecting the hot water storage tank and the supply device, and is used to cut off the third steam circulation when closed.

4. The heating system for heat and cold separation in a thermal power plant according to claim 1, characterized in that, The system also includes: The waste steam heat recovery heat exchanger includes a third circulation pipeline. The first end of the third circulation pipeline is connected to the steam extraction ejector device, and the second end of the third circulation pipeline is connected to the condenser, for transferring the waste steam generated by the steam extraction ejector device to the condenser for recovery.

5. The heating system for heat and cold separation in a thermal power plant according to claim 4, characterized in that, The system also includes: The third valve, with its first end connected to the first end of the third circulation pipeline and its second end connected to the second end of the third circulation pipeline, is used to bypass the exhaust steam heat recovery heat exchanger when closed.

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