Heat exchange system and method

Abstract

The invention discloses a heat exchange system and method, and relates to the technical field of energy utilization, the system comprises a controller, a first heat exchanger, a high-temperature storage tank, a second heat exchanger, a low-temperature storage tank and a plurality of pipelines, and regulating valves are arranged on the pipelines. A cold side outlet of the first heat exchanger is connected with an inlet of the high-temperature storage tank; an outlet of the high-temperature storage tank is connected with a hot side inlet of the second heat exchanger; a hot side outlet of the second heat exchanger is connected with an inlet of the low-temperature storage tank, and the cold side of the second heat exchanger is connected with heat utilization equipment; an outlet of the low-temperature storage tank is connected with a cold side inlet of the first heat exchanger; the hot side of the first heat exchanger is connected with heat supply equipment through a preset energy transmission channel, and a component is arranged on the preset energy transmission channel. When the electric load of the power grid system is increased, the controller can control the regulating valve and the parts, heat energy in the high-temperature storage tank is provided for the heat utilization equipment through the second heat exchanger so as to relieve the pressure of the increased electric load, and the reliability of the system is improved.

Description

Technical Field

[0001] The present application relates to the field of energy utilization technology, and in particular to a heat exchange system and method. Background Art

[0002] With the growth of energy demand and the need for energy structure transformation, thermal energy, as a clean, efficient and widely available energy form, has become increasingly important. Heating equipment and heat-using equipment are key equipment related to thermal energy. Heating equipment is equipment that generates and supplies thermal energy, and its main function is to convert energy into thermal energy. Heat-using equipment usually converts thermal energy into energy. Both heating equipment and heat-using equipment are closely connected with the power grid system.

[0003] At present, the heat exchange system usually transfers the heat energy generated in the heating equipment to the heat-using equipment through heat exchange to meet the heat energy demand.

[0004] However, due to factors such as weather conditions, economic activities, and user behavior, the power load of the power grid system is unstable. When the power load increases, heat-using equipment requires more thermal energy to be converted into electrical energy, while the heating equipment cannot provide enough thermal energy for the heat-using equipment, resulting in poor system reliability. Summary of the invention

[0005] In view of the above problems, the present application provides a heat energy supply device and method for a high temperature gas-cooled reactor in order to improve the reliability of the system. The specific scheme is as follows:

[0006] In a first aspect, the present application provides a heat exchange system, wherein the heat exchange system is connected to a heat supply device and a heat consumption device respectively, wherein the heat supply device and the heat consumption device are both connected to a power grid system to transmit electricity to the power grid system, and the heat exchange system comprises: a controller, a first heat exchanger, a high-temperature storage tank, a second heat exchanger and a low-temperature storage tank;

[0007] The hot side of the first heat exchanger is connected to the heat supply device via a preset energy transmission path, and the preset energy transmission path is provided with a component for controlling energy transmission in the preset energy transmission path;

[0008] The cold side outlet of the first heat exchanger is connected to the inlet of the high temperature storage tank through a first pipeline, and a first regulating valve is provided on the first pipeline;

[0009] The outlet of the high-temperature storage tank is connected to the hot side inlet of the second heat exchanger through a second pipeline, and a second regulating valve is provided on the second pipeline;

[0010] The hot side outlet of the second heat exchanger is connected to the inlet of the low-temperature storage tank through a third pipeline, the cold side inlet and the cold side outlet of the second heat exchanger are both connected to the heat-using equipment, and a third regulating valve is provided on the third pipeline;

[0011] The outlet of the low-temperature storage tank is connected to the cold side inlet of the first heat exchanger through a fourth pipeline, and a fourth regulating valve is provided on the fourth pipeline;

[0012] The controller is electrically connected to the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve and the components, respectively.

[0013] In a possible implementation, the high-temperature storage tank is a high-temperature molten salt tank, the low-temperature storage tank is a low-temperature molten salt tank, and the transmission medium of the heat exchange system is molten salt.

[0014] In a possible implementation, the preset energy transmission path is a preset power transmission line or a preset heat energy transmission pipeline;

[0015] The hot side of the first heat exchanger is connected to the heating equipment through the preset power transmission line, a circuit valve is provided on the preset power transmission line, and the first heat exchanger is an electric molten salt heat exchanger;

[0016] or,

[0017] The hot side of the first heat exchanger is connected to the heating equipment through the preset heat energy transmission pipeline, and a pipeline regulating valve is provided on the preset heat energy transmission pipeline. The first heat exchanger is a steam-water molten salt heat exchanger.

[0018] In a possible implementation, the heat supply equipment includes a nuclear island, a first steam turbine, a first condenser, a low-pressure heater, a first deaerator, a high-pressure heater, and a first generator, wherein the first generator is connected to the power grid system to deliver electricity to the power grid system;

[0019] In the case where the preset energy transmission path is the preset power transmission line, the main steam outlet of the nuclear island is connected to the main steam inlet of the first steam turbine, the exhaust port of the first steam turbine is connected to the hot side inlet of the first condenser, the extraction port of the first steam turbine is respectively connected to the hot side inlet of the low-pressure heater, the hot side inlet of the first deaerator and the hot side inlet of the high-pressure heater, the hot side outlet of the first condenser is connected to the cold side inlet of the low-pressure heater, the cold side outlet of the low-pressure heater is connected to the cold side inlet of the first deaerator, the outlet of the first deaerator is connected to the cold side inlet of the high-pressure heater, the cold side outlet of the high-pressure heater is connected to the feed water inlet of the nuclear island, the first steam turbine is drivingly connected to the first generator, and the first generator is connected to the molten salt heat exchanger through the preset power transmission line;

[0020] and / or,

[0021] In the case where the preset energy transmission pathway is a preset heat energy transmission pipeline, the main steam outlet of the nuclear island is connected to the main steam inlet of the first steam turbine, the main steam outlet of the nuclear island is connected to the hot side inlet of the steam-water molten salt heat exchanger through the first preset pipeline in the preset heat energy transmission pipeline, the exhaust port of the first steam turbine is connected to the hot side inlet of the first condenser, the extraction port of the first steam turbine is respectively connected to the hot side inlet of the low-pressure heater, the hot side inlet of the first deaerator and the hot side inlet of the high-pressure heater, the hot side outlet of the steam-water molten salt heat exchanger is connected to the inlet of the first condenser, the hot side outlet of the first condenser is connected to the cold side inlet of the low-pressure heater, the cold side outlet of the low-pressure heater is connected to the cold side inlet of the first deaerator, the outlet of the first deaerator is connected to the cold side inlet of the high-pressure heater, the cold side outlet of the high-pressure heater is connected to the feed water inlet of the nuclear island, the first steam turbine is drivingly connected to the first generator, and the pipeline regulating valve is provided on the first preset pipeline.

[0022] In a possible implementation, when the preset energy transmission path is a preset heat energy transmission pipeline, the heat supply device further includes a heat network heater, and a cold side inlet and a cold side outlet of the heat network heater are both connected to a heat network system to supply heat to the heat network system;

[0023] The main steam outlet of the nuclear island is connected to the hot side inlet of the heat network heater;

[0024] The hot side outlet of the heating network heater is connected to the inlet of the first condenser.

[0025] In a possible implementation, when the preset energy transmission path is a preset heat energy transmission pipeline, the heat-using equipment includes a second steam turbine, a second generator, a second condenser, a second deaerator, a feed water tank, and a seawater desalination and desalination device, and the second generator is connected to the power grid system to transmit electricity to the power grid system;

[0026] The cold side outlet of the second heat exchanger is connected to the inlet of the second steam turbine through a fifth pipeline, the cold side outlet of the second heat exchanger is connected to the user-end device through a sixth pipeline, the cold side outlet of the second heat exchanger is connected to the steam inlet of the first steam turbine through a seventh pipeline, a fifth regulating valve is provided on the fifth pipeline, a sixth regulating valve is provided on the sixth pipeline, a seventh regulating valve is provided on the seventh pipeline, and the second steam turbine is drivingly connected to the second generator;

[0027] The exhaust port of the second steam turbine is connected to the hot side inlet of the second condenser;

[0028] The hot side outlet of the second condenser is connected to the inlet of the second deaerator;

[0029] The outlet of the seawater desalination and desalination device is connected to the inlet of the water supply tank;

[0030] The outlet of the water supply tank is connected to the inlet of the second deaerator through an eighth pipeline, and an eighth regulating valve is provided on the eighth pipeline;

[0031] The outlet of the second deaerator is connected to the cold side inlet of the second heat exchanger;

[0032] The controller is electrically connected to the fifth regulating valve, the sixth regulating valve, the seventh regulating valve, and the eighth regulating valve.

[0033] In a possible implementation, when the preset energy transmission path is the preset power transmission line, the heat-using equipment includes a second steam turbine, a second generator, a second condenser, and a second deaerator, and the second generator is connected to the power grid system to transmit power to the power grid system;

[0034] The cold side outlet of the second heat exchanger is connected to the inlet of the second steam turbine through a fifth pipeline, a fifth regulating valve is provided on the fifth pipeline, and the second steam turbine is drivingly connected to the second generator;

[0035] The exhaust port of the second steam turbine is connected to the hot side inlet of the second condenser;

[0036] The hot side outlet of the second condenser is connected to the inlet of the second deaerator;

[0037] The outlet of the second deaerator is connected to the cold side inlet of the second heat exchanger;

[0038] The controller is electrically connected to the fifth regulating valve.

[0039] A second aspect of the present application provides a heat exchange method, which is applied to any of the above-mentioned heat exchange systems, and the method comprises:

[0040] The controller obtains the current electrical load of the power grid system;

[0041] The controller adjusts the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve, and the components based on the current electrical load and the rated electrical load to absorb heat through the second heat exchanger using a thermal device.

[0042] In a possible implementation, when the preset energy transmission path is a preset heat energy transmission pipeline, the controller adjusts the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve and the components based on the current electrical load and the rated electrical load, including:

[0043] If the current electrical load is less than the rated electrical load, the controller opens the first regulating valve, the fourth regulating valve and the component, and closes the second regulating valve and the third regulating valve;

[0044] If the current electrical load is the rated electrical load, the controller closes the first regulating valve, the fourth regulating valve and the component, and opens the second regulating valve and the third regulating valve;

[0045] If the current electrical load is greater than the rated electrical load, the controller closes the first regulating valve, the fourth regulating valve, and the component, and opens the second regulating valve and the third regulating valve.

[0046] In a possible implementation, when the preset energy transmission path is the preset power transmission line, the controller adjusts the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve and the components based on the current electrical load and the rated electrical load, including:

[0047] If the current electrical load is less than the rated electrical load, the controller opens the first regulating valve, the fourth regulating valve and the component, and closes the second regulating valve and the third regulating valve;

[0048] If the current electrical load is the rated electrical load, the controller closes the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve and the component;

[0049] If the current electrical load is greater than the rated electrical load, the controller closes the first regulating valve, the fourth regulating valve, and the component, and opens the second regulating valve and the third regulating valve.

[0050] By means of the above technical scheme, the present application provides a heat exchange system and method, wherein the heat exchange system is connected to a heat supply device and a heat using device respectively, and both the heat supply device and the heat using device are connected to a power grid system to transmit electricity to the power grid system, and the system includes a controller, a first heat exchanger, a high-temperature storage tank, a second heat exchanger and a low-temperature storage tank. The cold side outlet of the first heat exchanger is connected to the inlet of the high-temperature storage tank through the first pipeline, and the first pipeline is provided with a first regulating valve; the outlet of the high-temperature storage tank is connected to the hot side inlet of the second heat exchanger through the second pipeline, and the second pipeline is provided with a second regulating valve; the hot side outlet of the second heat exchanger is connected to the inlet of the low-temperature storage tank through the third pipeline, and the cold side inlet and the cold side outlet of the second heat exchanger are both connected to the heat-using equipment, and the third pipeline is provided with a third regulating valve; the outlet of the low-temperature storage tank is connected to the cold side inlet of the first heat exchanger through the fourth pipeline, and the fourth pipeline is provided with a fourth regulating valve; the hot side of the first heat exchanger is connected to the heating equipment through a preset energy transmission path, and the preset energy transmission path is provided with a component for controlling energy transmission in the preset energy transmission path; the controller is electrically connected to the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve, and the components, respectively. When the power load of the power grid system decreases, the thermal energy can be stored in the high-temperature storage tank through the first heat exchanger. When the power load of the power grid system increases, the thermal energy in the high-temperature storage tank can be provided to the heat-using equipment through the second heat exchanger to relieve the pressure of the increased power load of the power grid system, which is beneficial to improving the reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the accompanying drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and the originals and elements are not necessarily drawn to scale.

[0052] Figure 1 A schematic diagram of the structure of a heat exchange system provided in an embodiment of the present application;

[0053] Figure 2 A schematic diagram of the structure of another heat exchange system provided in an embodiment of the present application;

[0054] Figure 3 One of the structural schematic diagrams of another heat exchange system provided in an embodiment of the present application;

[0055] Figure 4 A second structural schematic diagram of another heat exchange system provided in an embodiment of the present application;

[0056] Figure 5 A third structural schematic diagram of another heat exchange system provided in an embodiment of the present application;

[0057] Figure 6 A fourth structural schematic diagram of another heat exchange system provided in an embodiment of the present application;

[0058] Figure 7 A schematic diagram of a heat exchange method provided in an embodiment of the present application;

[0059] Figure 8 A schematic diagram of the hardware structure of a heat exchange device provided in an embodiment of the present application.

[0060] Reference numerals:

[0061] 100-controller; 200-first heat exchanger; 300-high temperature storage tank; 400-second heat exchanger; 500-low temperature storage tank; 600-heating equipment; 601-nuclear island; 602-first steam turbine; 603-first condenser; 604-low pressure heater; 605-first deaerator; 606-high pressure heater; 607-first generator; 608-heat network heater; 700-heating equipment; 701-second steam turbine; 702-second generator; 703-second Condenser; 704-second deaerator; 705-seawater desalination and desalination device; 706-feedwater tank; 10-first pipeline; 20-second pipeline; 30-third pipeline; 40-fourth pipeline; 50-fifth pipeline; 60-sixth pipeline; 70-seventh pipeline; 80-eighth pipeline; 1-component; 2-first regulating valve; 3-second regulating valve; 4-third regulating valve; 5-fourth regulating valve; 6-fifth regulating valve; 7-sixth regulating valve; 8-seventh regulating valve; 9-eighth regulating valve. DETAILED DESCRIPTION

[0062] The following describes the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. The terms used in the implementation method section of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application.

[0063] The embodiments of the present application are described below in conjunction with the accompanying drawings. Those skilled in the art will appreciate that, with the development of technology and the emergence of new scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0064] The terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and need not be used to describe a specific order or sequential order. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, which is only to describe the distinction mode adopted by the objects of the same attributes when describing in the embodiments of the present application. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, so that the process, method, system, product or equipment comprising a series of units need not be limited to those units, but may include other units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0065] In order to improve the reliability of the system, the present application provides a heat exchange system. The heat exchange system provided by the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0066] Please see attached Figure 1 , Figure 1 A structural schematic diagram of a heat exchange system provided in an embodiment of the present application, the heat exchange system is connected to a heat supply device 600 and a heat using device 700, respectively. The heat supply device 600 and the heat using device 700 are both connected to a power grid system to transmit electricity to the power grid system. The heat exchange system includes: a controller 100, a first heat exchanger 200, a high-temperature storage tank 300, a second heat exchanger 400 and a low-temperature storage tank 500.

[0067] In the present application, the system is mainly composed of a controller 100, a first heat exchanger 200, a high-temperature storage tank 300, a second heat exchanger 400 and a low-temperature storage tank 500. The heat energy generated by the heating equipment 600 is transferred to the heat-using equipment 700 through the heat exchange process, thereby realizing the storage and recycling of heat energy.

[0068] The hot side of the first heat exchanger 200 is connected to the heating device 600 via a preset energy transmission path, and a component 1 for controlling energy transmission in the preset energy transmission path is provided on the preset energy transmission path.

[0069] It should be noted that the first heat exchanger 200 is used to exchange heat between the transmission medium of the heating system with different temperatures and the transmission medium of the heat exchange system through heat conduction, convection or radiation. The first heat exchanger 200 has two independent fluid channels, the hot side and the cold side. The hot side is the side that absorbs heat from the heat source, and the cold side is the side that dissipates heat to the cold source.

[0070] In the present application, two preset energy transmission paths are involved: a preset power transmission line and a preset heat transmission pipeline. Both the preset power transmission line and the preset heat transmission pipeline heat the transmission medium of the heat exchange system. The controller 100 is electrically connected to the component 1. The controller 100 can control the heat energy flow entering the hot side of the first heat exchanger 200 by controlling the switch of the component 1 to meet the actual needs of the system.

[0071] The heat supply device 600 includes a nuclear island 601, a first steam turbine 602, a first condenser 603, a low-pressure heater 604, a first deaerator 605, a high-pressure heater 606 and a first generator 607. The first generator 607 is connected to the power grid system to transmit electricity to the power grid system. The transmission medium of the heat supply device 600 can be steam.

[0072] The heating equipment 600 can generate heat energy through the nuclear island 601, and the heat energy drives the steam turbine to rotate, and the steam turbine drives the generator to generate electricity, converting part of the energy into electrical energy and transmitting it to the power grid system. It can also achieve heat recovery and reuse through the coordinated work of components such as the first deaerator 605 and the first condenser 603.

[0073] As an implementable embodiment, the hot side of the first heat exchanger 200 is connected to the heating device 600 through a preset power transmission line, a circuit valve is provided on the preset power transmission line, and the first heat exchanger 200 can be an electric molten salt heat exchanger. The transmission medium of the heat exchange system can be molten salt.

[0074] At this time, the outlet of the nuclear island 601 is connected to the main steam inlet of the first steam turbine 602, the exhaust port of the first steam turbine 602 is connected to the hot side inlet of the first condenser 603, the extraction port of the first steam turbine 602 is respectively connected to the hot side inlet of the low-pressure heater 604, the hot side inlet of the first deaerator 605 and the hot side inlet of the high-pressure heater 606, the hot side outlet of the first condenser 603 is connected to the cold side inlet of the low-pressure heater 604, the cold side outlet of the low-pressure heater 604 is connected to the cold side inlet of the first deaerator 605, the outlet of the first deaerator 605 is connected to the cold side inlet of the high-pressure heater 606, the cold side outlet of the high-pressure heater 606 is connected to the feed water inlet of the nuclear island 601, the first steam turbine 602 is transmission-connected to the first generator 607, and the first generator 607 is connected to the molten salt heat exchanger through a preset power transmission line. For ease of understanding, please refer to Figure 2 , Figure 2 A schematic diagram of the structure of another heat exchange system provided in an embodiment of the present application.

[0075] The nuclear island 601 includes a nuclear reactor and its auxiliary systems. The nuclear reactor generates a large amount of heat energy through nuclear fission reactions. High-temperature steam with a large amount of heat energy enters the first steam turbine 602 to drive it to rotate. The steam with reduced temperature and pressure in the first steam turbine 602 is sent to the first condenser 603 for condensation. During the operation of the first steam turbine 602, part of the steam is extracted and used to heat condensed water, deoxidize and further heat. The water condensed in the first condenser 603 is sent to the low-pressure heater 604 for preheating. The preheated water enters the first deaerator 605 for deoxidation. The deoxidized water is sent to the high-pressure heater 606 for further heating. The heated water eventually returns to the nuclear island 601 to continue the cycle. The first steam turbine 602 is connected to the first generator 607 in a transmission manner. The rotational kinetic energy of the first steam turbine 602 is transmitted to the first generator 607 through the transmission device to drive it to generate electricity.

[0076] Part of the electric energy generated by the first generator 607 can be supplied to the molten salt heat exchanger through a preset power transmission line to heat the molten salt. The circuit valve on the power transmission line is used to control the current on and off on the power transmission line to achieve power supply control for the molten salt heat exchanger. Another part of the electric energy generated by the first generator 607 can be transmitted to the power grid system, which is responsible for transmitting the electric energy to various power consumption points, including households, enterprises, public facilities, etc.

[0077] As another possible implementation, the hot side of the first heat exchanger 200 is connected to the heating device 600 through a preset heat energy transmission pipeline, and a pipeline regulating valve is provided on the preset heat energy transmission pipeline. In this case, the first heat exchanger 200 can be a steam-water molten salt heat exchanger. The transmission medium of the heating device 600 can be steam.

[0078] At this time, the outlet of the nuclear island 601 is connected to the main steam inlet of the first steam turbine 602, the outlet of the nuclear island 601 is connected to the hot side inlet of the steam-water molten salt heat exchanger through the first preset pipeline in the preset heat energy transmission pipeline, the exhaust port of the first steam turbine 602 is connected to the hot side inlet of the first condenser 603, the extraction port of the first steam turbine 602 is respectively connected to the hot side inlet of the low-pressure heater 604, the hot side inlet of the first deaerator 605 and the hot side inlet of the high-pressure heater 606, and the hot side of the steam-water molten salt heat exchanger is connected to the hot side of the steam-water molten salt heat exchanger. The outlet is connected to the inlet of the first condenser 603, the hot side outlet of the first condenser 603 is connected to the cold side inlet of the low pressure heater 604, the cold side outlet of the low pressure heater 604 is connected to the cold side inlet of the first deaerator 605, the outlet of the first deaerator 605 is connected to the cold side inlet of the high pressure heater 606, the cold side outlet of the high pressure heater 606 is connected to the feed water inlet of the nuclear island 601, the first steam turbine 602 is connected to the first generator 607 in transmission connection, and a pipeline regulating valve is arranged on the first preset pipeline. For ease of understanding, please refer to Figure 3 , Figure 3 This is one of the structural schematic diagrams of another heat exchange system provided in an embodiment of the present application.

[0079] The nuclear island 601 includes a nuclear reactor and its auxiliary systems. The nuclear reactor generates a large amount of heat energy through nuclear fission reactions. Part of the high-temperature steam with a large amount of heat energy enters the first steam turbine 602 to drive it to rotate. The steam whose temperature and pressure are reduced in the first steam turbine 602 is sent to the first condenser 603 for condensation. During the operation of the first steam turbine 602, part of the steam is extracted and used to heat condensed water, deoxidize and further heat. The water condensed in the first condenser 603 is sent to the low-pressure heater 604 for preheating. The preheated water enters the first deaerator 605 for deoxidation. The deoxidized water is sent to the high-pressure heater 606 for further heating. The heated water eventually returns to the nuclear island 601 to continue the cycle. The first steam turbine 602 is connected to the first generator 607 in a transmission manner, and the rotational kinetic energy of the first steam turbine 602 is transmitted to the first generator 607 through the transmission device to drive it to generate electricity. The electric energy generated by the first generator 607 can be transmitted to the power grid system, which is responsible for transmitting the electric energy to various power consumption points, including households, enterprises, public facilities, etc.

[0080] Another part of the high-temperature steam with a large amount of heat energy is transmitted to the hot side inlet of the steam-water molten salt heat exchanger through the first preset pipeline of the preset heat energy transmission pipeline, and heat is exchanged with the molten salt to heat the molten salt. After the heat exchange is completed, the temperature of the high-temperature steam that originally carries a large amount of heat energy will decrease, and the steam with a reduced temperature is transmitted to the first condenser 603 through the hot side outlet of the first heat exchanger 200 for condensation, thereby realizing the recycling of heat energy. The pipeline regulating valve on the preset heat energy transmission pipeline is used to preset the steam flow on the heat energy transmission pipeline to realize the heat energy supply control of the steam-water molten salt heat exchanger.

[0081] Furthermore, in the case where the preset energy transmission path is a preset heat energy transmission pipeline, the heat supply device 600 may further include a heat network heater 608. The cold side inlet and the cold side outlet of the heat network heater 608 are both connected to the heat network system to supply heat to the heat network system, the outlet of the nuclear island 601 is connected to the hot side inlet of the heat network heater 608, and the hot side outlet of the heat network heater 608 is connected to the inlet of the first condenser 603. For ease of understanding, please refer to Figure 4 , Figure 4 The second structural schematic diagram of another heat exchange system provided in an embodiment of the present application.

[0082] It should be noted that the heat network heater 608 is used to exchange heat between steam of different temperatures and other heat transfer media of the heat network heater 608 through heat conduction, convection or radiation. The heat network heater 608 has two independent fluid channels, the hot side and the cold side. The hot side is the side that absorbs heat from the heat source, and the cold side is the side that dissipates heat to the cold source. The other heat transfer medium of the heat network heater 608 can be steam.

[0083] Another part of the high-temperature steam with a large amount of heat energy enters the hot side inlet of the heating network heater 608, and performs heat exchange with the steam of the heating network heater 608 to heat the steam of the heating network heater 608. After the heat exchange is completed, the temperature of the high-temperature steam that originally carries a large amount of heat energy will decrease, and the steam with a reduced temperature is transmitted from the hot side outlet of the heating network heater 608 to the first condenser 603 for condensation, so as to realize the recycling of heat energy; the steam temperature of the heating network heater 608 increases, and the steam with a large amount of heat energy can be transmitted to the heating network system, which is responsible for transmitting heat energy to various hot spots, including households, enterprises, public facilities, etc.

[0084] The cold side outlet of the first heat exchanger 200 is connected to the inlet of the high temperature storage tank 300 through the first pipeline 10 , and the first regulating valve 2 is provided on the first pipeline 10 .

[0085] It should be noted that the high temperature storage tank 300 is a relatively high temperature environment and can store fluids that need to be stored at high temperatures. The high temperature storage tank 300 can be a high temperature molten salt tank.

[0086] In the present application, the high temperature molten salt obtained after heat exchange can be transported to the high temperature molten salt tank through the first pipeline 10, and the high temperature molten salt tank stores the high temperature molten salt. The controller 100 is electrically connected to the first regulating valve 2, and the controller 100 can control the heat energy flow entering the high temperature storage tank 300 by controlling the switch of the first regulating valve 2 to meet the actual needs of the system.

[0087] The outlet of the high-temperature storage tank 300 is connected to the hot-side inlet of the second heat exchanger 400 through the second pipeline 20 , and the second regulating valve 3 is provided on the second pipeline 20 .

[0088] In the present application, the high temperature molten salt in the high temperature molten salt tank can be transported to the second heat exchanger 400 through the second pipeline 20, and the second heat exchanger 400 performs heat exchange on the high temperature molten salt. The controller 100 is electrically connected to the second regulating valve 3, and the controller 100 can control the heat energy flow entering the hot side inlet of the second heat exchanger 400 by controlling the switch of the second regulating valve 3 to meet the actual needs of the system.

[0089] Furthermore, a high-temperature molten salt pump may be provided on the second pipeline 20. Since the high-temperature molten salt needs to overcome factors such as pipeline resistance and height difference during the transmission process, a powerful pump is required to promote its flow. The high-temperature molten salt pump can provide the necessary power for the high-temperature molten salt to be transmitted from the high-temperature storage tank 300 to the second pipeline 20.

[0090] The hot side outlet of the second heat exchanger 400 is connected to the inlet of the low-temperature storage tank 500 through the third pipe 30, and the cold side inlet and cold side outlet of the second heat exchanger 400 are both connected to the heat-using equipment 700. The third pipe 30 is provided with a third regulating valve 4.

[0091] It should be noted that the cryogenic storage tank 500 is a relatively low temperature environment, and can store fluids that need to be stored at low temperatures. The cryogenic storage tank 500 can be a low temperature molten salt tank. The second heat exchanger 400 is used to exchange heat between molten salts of different temperatures and the transmission medium of the heat-using device 700 through heat conduction, convection or radiation, and the second heat exchanger 400 has two independent fluid channels on the hot side and the cold side. The transmission medium of the heat-using device 700 can be steam.

[0092] In the present application, the heat energy of the high-temperature molten salt is used as the heat source of the heat-using device 700, and heat exchange is performed with the transmission medium of the heat-using device 700 to provide heat energy for the heat-using device 700. After the heat exchange is completed, the temperature of the original high-temperature lava will decrease, and the low-temperature molten salt at the hot side outlet of the second heat exchanger 400 is transported to the low-temperature molten salt tank through the third pipeline 30 for storage. The controller 100 is electrically connected to the third regulating valve 4. The controller 100 can control the heat energy flow entering the low-temperature storage tank by controlling the switch of the third regulating valve 4 to meet the actual needs of the system.

[0093] When the preset energy transmission path is a preset heat energy transmission pipeline, the heat-using equipment 700 includes a second steam turbine 701, a second generator 702, a second condenser 703, a second deaerator 704, a feed water tank 706 and a seawater desalination and desalination device 705, and the second generator 702 is connected to the power grid system to transmit electricity to the power grid system.

[0094] The cold side outlet of the second heat exchanger 400 is connected to the inlet of the second steam turbine 701 through the fifth pipeline 50, the cold side outlet of the second heat exchanger 400 is connected to the user-end device through the sixth pipeline 60, the cold side outlet of the second heat exchanger 400 is connected to the steam inlet of the first steam turbine 602 through the seventh pipeline 70, the fifth regulating valve 6 is provided on the fifth pipeline 50, the sixth regulating valve 7 is provided on the sixth pipeline 60, the seventh regulating valve 8 is provided on the seventh pipeline 70, and the second steam turbine 701 is connected to the second generator 702 in a transmission manner. The exhaust port of the second steam turbine 701 is connected to the hot side inlet of the second condenser 703. The hot side outlet of the second condenser 703 is connected to the inlet of the second deaerator 704. The outlet of the seawater desalination and desalination device 705 is connected to the inlet of the feed water tank 706. The outlet of the feed water tank 706 is connected to the inlet of the second deaerator 704 through the eighth pipeline 80, and the eighth regulating valve 9 is provided on the eighth pipeline 80. The outlet of the second deaerator 704 is connected to the cold side inlet of the second heat exchanger 400. The controller 100 is electrically connected to the fifth regulating valve 6, the sixth regulating valve 7, the seventh regulating valve 8 and the eighth regulating valve 9. For ease of understanding, please refer to Figure 5 , Figure 5 The third structural schematic diagram of another heat exchange system provided in an embodiment of the present application.

[0095] The cold side outlet of the second heat exchanger 400 has three main paths: one is connected to the inlet of the second steam turbine 701 through the fifth pipeline 50 to drive the steam turbine to rotate; the second is connected to the user-end equipment through the sixth pipeline 60 to directly provide hot steam to the user; the third is connected to the steam inlet of the second steam turbine 701 through the seventh pipeline 70 to achieve the redistribution and utilization of heat energy. The second steam turbine 701 is driven to rotate by the steam received from the second heat exchanger 400, and then drives the second generator 702 to generate electricity. The electric energy generated by the second generator 702 can be transmitted to the power grid system, which is responsible for transmitting the electric energy to various power consumption points, including households, enterprises, public facilities, etc. The second condenser 703 receives the low-temperature steam discharged from the second steam turbine 701 and condenses it into water. The seawater desalination and desalination device 705 converts seawater into fresh water, and removes salt and other impurities through desalination treatment to ensure the purity of the water used in the system. The outlet of the seawater desalination and desalination device 705 is connected to the inlet of the water supply tank 706 to provide high-quality make-up water for the system. The second deaerator 704 receives condensed water from the second condenser 703 and replenished water from the water tank 706, removes dissolved oxygen in the water to prevent oxygen from corroding equipment, and adjusts the water temperature to provide suitable conditions for the water that subsequently enters the second heat exchanger 400.

[0096] The controller 100 is electrically connected to the fifth regulating valve 6, the sixth regulating valve 7, the seventh regulating valve 8 and the eighth regulating valve 9 respectively. The controller 100 can control the flow of thermal energy entering the second steam turbine 701 by controlling the switching of the fifth regulating valve 6, the sixth regulating valve 7, the seventh regulating valve 8 and the eighth regulating valve 9 to meet the actual needs of the system.

[0097] When the preset energy transmission path is a preset power transmission line, the heat-using device 700 includes a second steam turbine 701, a second generator 702, a second condenser 703 and a second deaerator 704. The second generator 702 is connected to the power grid system to transmit power to the power grid system.

[0098] The cold side outlet of the second heat exchanger 400 is connected to the inlet of the second steam turbine 701 through the fifth pipeline 50, and the fifth regulating valve 6 is provided on the fifth pipeline 50. The second steam turbine 701 is transmission-connected to the second generator 702. The exhaust port of the second steam turbine 701 is connected to the hot side inlet of the second condenser 703. The hot side outlet of the second condenser 703 is connected to the inlet of the second deaerator 704. The outlet of the second deaerator 704 is connected to the cold side inlet of the second heat exchanger 400. The controller 100 is electrically connected to the fifth regulating valve 6. For ease of understanding, please refer to Figure 6 , Figure 6 The fourth structural schematic diagram of another heat exchange system provided in an embodiment of the present application.

[0099] The steam heated by the second heat exchanger 400 enters the inlet of the second steam turbine 701 through the fifth pipeline 50, and is used to drive the steam turbine to rotate, thereby driving the second generator 702 to generate electricity. The electric energy generated by the second generator 702 can be transmitted to the power grid system, which is responsible for transmitting the electric energy to various power consumption points, including households, enterprises, public facilities, etc. The second condenser 703 receives the low-temperature steam discharged from the second steam turbine 701 and condenses it into water. The second deaerator 704 receives the condensed water from the second condenser 703, removes the dissolved oxygen in the water, prevents oxygen from corroding the equipment, and adjusts the water temperature to provide suitable conditions for the water that subsequently enters the second heat exchanger 400 to continue circulating.

[0100] The controller 100 is electrically connected to the fifth regulating valve 6. The controller 100 can control the heat energy flow entering the second steam turbine 701 by controlling the switch of the fifth regulating valve 6 to meet the actual needs of the system.

[0101] The outlet of the low-temperature storage tank 500 is connected to the cold-side inlet of the first heat exchanger 200 through a fourth pipeline 40 , and a fourth regulating valve 5 is provided on the fourth pipeline 40 .

[0102] In the present application, the low-temperature molten salt in the low-temperature molten salt tank can be transported to the cold side inlet of the first heat exchanger 200 through the fourth pipeline 40 to continue to circulate. The controller 100 is electrically connected to the fourth regulating valve 5. The controller 100 can control the heat energy flow entering the low-temperature storage tank by controlling the switch of the fourth regulating valve 5 to meet the actual needs of the system.

[0103] Furthermore, a low-temperature molten salt pump may be provided on the fourth pipeline 40. The low-temperature molten salt may solidify or become viscous during the transmission process, and the low-temperature molten salt pump may keep the low-temperature molten salt flowing in the fourth pipeline 40 to prevent it from solidifying or blocking the pipeline. The low-temperature molten salt pump may extract the low-temperature molten salt from the low-temperature molten salt tank and send it back to the cold side inlet of the first heat exchanger 200 through the fourth pipeline 40, thereby continuing the circulation of the molten salt.

[0104] In summary, the present application provides a heat exchange system, which is connected to a heat supply device and a heat-using device respectively, and the heat supply device and the heat-using device are both connected to a power grid system to transmit electricity to the power grid system. The system includes a controller, a first heat exchanger, a high-temperature storage tank, a second heat exchanger and a low-temperature storage tank. The cold side outlet of the first heat exchanger is connected to the inlet of the high-temperature storage tank through the first pipeline, and the first pipeline is provided with a first regulating valve; the outlet of the high-temperature storage tank is connected to the hot side inlet of the second heat exchanger through the second pipeline, and the second pipeline is provided with a second regulating valve; the hot side outlet of the second heat exchanger is connected to the inlet of the low-temperature storage tank through the third pipeline, and the cold side inlet and the cold side outlet of the second heat exchanger are both connected to the heat-using equipment, and the third pipeline is provided with a third regulating valve; the outlet of the low-temperature storage tank is connected to the cold side inlet of the first heat exchanger through the fourth pipeline, and the fourth pipeline is provided with a fourth regulating valve; the hot side of the first heat exchanger is connected to the heating equipment through a preset energy transmission path, and the preset energy transmission path is provided with a component for controlling energy transmission in the preset energy transmission path; the controller is electrically connected to the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve, and the components, respectively. When the power load of the power grid system decreases, the thermal energy can be stored in the high-temperature storage tank through the first heat exchanger. When the power load of the power grid system increases, the thermal energy in the high-temperature storage tank can be provided to the heat-using equipment through the second heat exchanger to relieve the pressure of the increased power load of the power grid system, which is beneficial to improving the reliability of the system.

[0105] The heat exchange system is described in detail in the embodiments disclosed in the present application. There are various forms of methods that can be applied to the heat exchange system of the present application. Therefore, the heat exchange method provided by the present application is further described in detail below in conjunction with the drawings and specific implementation methods.

[0106] Please see attached Figure 7 , Figure 7A schematic flow chart of a heat exchange method provided in an embodiment of the present application. The method is applied to any of the above-mentioned heat exchange systems and may include the following steps:

[0107] Step S101: The controller obtains the current electrical load of the power grid system.

[0108] It should be noted that the current power load refers to the total amount of electricity consumed by all power-consuming devices in the power grid system at the current moment. It changes in real time and reflects the current operating status and power demand of the power grid system.

[0109] In this application, the controller can obtain the current power load of the power grid system in real time through smart meters, remote sensors or other monitoring means in order to make correct adjustment decisions. For example, a large number of smart meters are usually installed in the power grid system, which can measure and record the user's power consumption in real time and transmit the data to the data acquisition system. The controller can obtain the data of these meters in real time through the interface with the data acquisition system, thereby obtaining the current power load of the power grid system.

[0110] Step S102: The controller adjusts the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve and the components based on the current electrical load and the rated electrical load to absorb heat through the second heat exchanger using the thermal device.

[0111] It should be noted that the rated electrical load is the maximum power load that the power grid system can withstand during normal operation. This is a standard value determined by the manufacturer based on factors such as the equipment's design specifications, material properties, and heat dissipation conditions to ensure that the equipment operates safely and stably without exceeding its design limits.

[0112] In this application, the controller compares the current electrical load of the power grid system with the rated electrical load and formulates corresponding control strategies to optimize thermal energy utilization and ensure efficient and safe operation of the heat exchange system.

[0113] Specifically, the controller compares the current electrical load with the rated electrical load. If the current electrical load is greater than the rated electrical load, the controller will immediately identify that the power grid system is in an overloaded state and can control various regulating valves and components to reduce the pressure on the power grid system; if the current electrical load is the rated electrical load, this means that the power grid system is in normal operation and all equipment is working within its design range; if the current electrical load is less than the rated electrical load, this indicates that the power grid system is currently in a light load state and has a large amount of remaining capacity. The controller can control various regulating valves and components to store excess electrical energy so that it can be released and used during peak electrical loads to optimize thermal energy utilization.

[0114] When the preset energy transmission path is the preset heat energy transmission pipeline, if the current electrical load is less than the rated electrical load, the controller opens the first regulating valve, the fourth regulating valve and the component, and closes the second regulating valve and the third regulating valve; if the current electrical load is the rated electrical load, the controller closes the first regulating valve, the fourth regulating valve and the component, and opens the second regulating valve and the third regulating valve; if the current electrical load is greater than the rated electrical load, the controller closes the first regulating valve, the fourth regulating valve and the component, and opens the second regulating valve and the third regulating valve.

[0115] In the present application, the hot side of the first heat exchanger is connected to the heating equipment through a preset heat energy transmission pipeline, and a pipeline regulating valve is provided on the preset heat energy transmission pipeline. At this time, the first heat exchanger can be a steam-water molten salt heat exchanger. The heat-using equipment includes a second steam turbine, a second generator, a second condenser, a second deaerator, a feed water tank and a seawater desalination and desalination device, and the second generator is connected to the power grid system to transmit electricity to the power grid system. The cold side outlet of the second heat exchanger is connected to the inlet of the second steam turbine through the fifth pipeline, the cold side outlet of the second heat exchanger is connected to the user-end device through the sixth pipeline, the cold side outlet of the second heat exchanger is connected to the steam inlet of the first steam turbine through the seventh pipeline, the fifth regulating valve is provided on the fifth pipeline, the sixth regulating valve is provided on the sixth pipeline, and the seventh regulating valve is provided on the seventh pipeline. The second steam turbine is connected to the second generator by transmission. The exhaust port of the second steam turbine is connected to the hot side inlet of the second condenser. The hot side outlet of the second condenser is connected to the inlet of the second deaerator. The outlet of the desalination and desalination device is connected to the inlet of the water supply tank. The outlet of the water supply tank is connected to the inlet of the second deaerator through the eighth pipeline, and the eighth regulating valve is arranged on the eighth pipeline. The outlet of the second deaerator is connected to the cold side inlet of the second heat exchanger. The controller is electrically connected to the fifth regulating valve, the sixth regulating valve, the seventh regulating valve and the eighth regulating valve.

[0116] Further, in the case where the preset energy transmission path is a preset heat energy transmission pipeline, the heat supply equipment may further include a heat network heater. The cold side inlet and the cold side outlet of the heat network heater are both connected to the heat network system to supply heat to the heat network system, the main steam outlet of the nuclear island is connected to the hot side inlet of the heat network heater, and the hot side outlet of the heat network heater is connected to the inlet of the first condenser.

[0117] It should be noted that the current heat load refers to the total heat consumed by all heat-using equipment in the heat network system at the current moment. The rated heat load refers to the maximum power load that the heat network system can withstand during normal operation. The controller can obtain the current heat load of the heat network system in real time through heat meters, temperature sensors and flow sensors. The controller can compare the current heat load of the heat network system with the rated heat load, formulate corresponding control strategies to further optimize the use of heat energy, and further ensure the efficient and safe operation of the heat exchange system.

[0118] The regulating valves and components may include a first regulating valve, a second regulating valve, a third regulating valve, a fourth regulating valve and components, and may also include a fifth regulating valve, a sixth regulating valve, a seventh regulating valve and an eighth regulating valve.

[0119] When the current electric load is less than the rated electric load and the current heat load is less than the rated heat load, the controller opens the first regulating valve, the fourth regulating valve and the components, and closes the second regulating valve, the third regulating valve, the fifth regulating valve, the sixth regulating valve, the seventh regulating valve and the eighth regulating valve. Part of the high-temperature steam with a large amount of heat energy enters the first steam turbine to drive it to rotate. The steam with reduced temperature and pressure in the first steam turbine is sent to the first condenser for condensation. During the operation of the first steam turbine, part of the steam is extracted and used to heat condensate, deoxidize and further heat. The water condensed in the first condenser is sent to the low-pressure heater for preheating. The preheated water enters the first deaerator for deoxidation. The deoxidized water is sent to the high-pressure heater for further heating. The heated water finally returns to the nuclear island to continue the cycle. The first steam turbine is connected to the first generator by transmission, and the rotational kinetic energy of the first steam turbine is transmitted to the first generator through the transmission device to drive it to generate electricity, and the power load of the power grid system is less than the rated power load. Another part of the high-temperature steam with a large amount of heat energy enters the hot side inlet of the heat network heater, and heat exchanges with the steam of the heat network heater to heat the steam of the heat network heater. After the heat exchange is completed, the temperature of the high-temperature steam that originally carries a large amount of heat energy will decrease, and the steam with a reduced temperature is transmitted from the hot side outlet of the heat network heater to the first condenser for condensation to realize the recycling of heat energy; the steam temperature of the heat network heater increases, and the steam with a large amount of heat energy can be transported to the heat network system, which is responsible for transmitting the heat network to various hot spots, including homes, enterprises, public facilities, etc., and the heat load of the heat network system is less than the rated heat load. Another part of the high-temperature steam with a large amount of heat energy is transmitted to the hot side inlet of the steam-water molten salt heat exchanger through the first preset pipeline of the preset heat energy transmission pipeline, and heat exchanges with the molten salt to heat the molten salt. The high-temperature molten salt obtained after heating can be transported to the high-temperature molten salt tank, which stores the high-temperature molten salt. The low-temperature molten salt in the low-temperature molten salt tank can be transported to the cold side inlet of the first heat exchanger to continue heating and storing the molten salt. At this time, the second heat exchanger and the heat-using equipment are not in operation. This process can store excess thermal energy.

[0120] When the current electric load is the rated electric load and the current heat load is the rated heat load, the controller closes the first regulating valve, the fourth regulating valve, the component and the fifth regulating valve, and opens the second regulating valve, the third regulating valve, the sixth regulating valve, the seventh regulating valve and the eighth regulating valve. Part of the high-temperature steam with a large amount of heat energy enters the first steam turbine to drive it to rotate. The steam with reduced temperature and pressure in the first steam turbine is sent to the first condenser for condensation. During the operation of the first steam turbine, part of the steam is extracted and used to heat condensate, deoxidize and further heat. The water condensed in the first condenser is sent to the low-pressure heater for preheating. The preheated water enters the first deaerator for deoxidation. The deoxidized water is sent to the high-pressure heater for further heating. The heated water finally returns to the nuclear island to continue the cycle. The first steam turbine is connected to the first generator by transmission, and the rotational kinetic energy of the first steam turbine is transmitted to the first generator through the transmission device to drive it to generate electricity. The power grid system is in normal operation, and all electrical equipment is working within its design range. Another part of the high-temperature steam with a large amount of heat energy enters the hot side inlet of the heat network heater, and heat exchanges with the steam of the heat network heater to heat the steam of the heat network heater. After the heat exchange is completed, the temperature of the high-temperature steam that originally carries a large amount of heat energy will decrease, and the steam with a reduced temperature is transmitted from the hot side outlet of the heat network heater to the first condenser for condensation to realize the recycling of heat energy; the steam temperature of the heat network heater increases, and the steam with a large amount of heat energy can be transported to the heat network system, which is responsible for transmitting the heat network to various hot spots, including homes, enterprises, public facilities, etc. The heat network system is in normal operation, and all heat-using equipment is working within its design range. The high-temperature molten salt in the high-temperature molten salt tank can be transported to the second heat exchanger, and the second heat exchanger performs heat exchange on the high-temperature molten salt. The steam heated by the second heat exchanger is connected to the user-end equipment through the sixth pipeline to directly provide hot steam to the user; and is connected to the steam inlet of the second steam turbine through the seventh pipeline to realize the redistribution and utilization of heat energy. The desalination and desalination device converts seawater into fresh water and removes salt and other impurities through desalination treatment to ensure the purity of the water used in the system. The outlet of the desalination and desalination device is connected to the inlet of the water supply tank to provide high-quality water supply for the system. The second deaerator receives the water supply from the water supply tank, removes the dissolved oxygen in the water, prevents oxygen from corroding the equipment, and adjusts the water temperature to provide suitable conditions for the water entering the second heat exchanger later.

[0121] When the current electric load is greater than the rated electric load and the current heat load is the rated heat load, the controller closes the first regulating valve, the fourth regulating valve, the component, the sixth regulating valve, the seventh regulating valve and the eighth regulating valve, and opens the second regulating valve, the third regulating valve and the fifth regulating valve. Part of the high-temperature steam with a large amount of heat energy enters the first steam turbine to drive it to rotate. The steam with reduced temperature and pressure in the first steam turbine is sent to the first condenser for condensation. During the operation of the first steam turbine, part of the steam is extracted and used to heat the condensate, deoxidize and further heat. The water condensed in the first condenser is sent to the low-pressure heater for preheating. The preheated water enters the first deaerator for deoxidation. The deoxidized water is sent to the high-pressure heater for further heating. The heated water eventually returns to the nuclear island to continue the cycle. The first steam turbine is connected to the first generator in a transmission manner, and the rotational kinetic energy of the first steam turbine is transmitted to the first generator through the transmission device to drive it to generate electricity. The power grid system is in an overload state. Another part of the high-temperature steam with a large amount of heat energy enters the hot side inlet of the heat network heater, and exchanges heat with the steam of the heat network heater to heat the steam of the heat network heater. After the heat exchange is completed, the temperature of the high-temperature steam that originally carried a large amount of heat energy will decrease, and the steam with a reduced temperature is transmitted from the hot side outlet of the heat network heater to the first condenser for condensation to realize the recycling of heat energy; the steam temperature of the heat network heater increases, and the steam with a large amount of heat energy can be transported to the heat network system, which is responsible for transmitting the heat network to various hot spots, including homes, businesses, public facilities, etc. The heat network system is in a normal state, and all heat-using equipment is working within its design range. The high-temperature molten salt in the high-temperature molten salt tank can be transported to the second heat exchanger, which performs heat exchange on the high-temperature molten salt. The steam heated by the second heat exchanger is connected to the inlet of the second steam turbine through the fifth pipeline, and is used to drive the steam turbine to rotate; the second steam turbine uses the heat energy received from the second heat exchanger to drive the rotation, and then drives the second generator to generate electricity. The electricity generated by the second generator can be transmitted to the power grid system. The power grid system is also responsible for transmitting the electricity to various power consumption points, including households, enterprises, public facilities, etc., thereby reducing the pressure on the power grid system.

[0122] When the preset energy transmission path is the preset power transmission line, if the current electrical load is less than the rated electrical load, the controller opens the first regulating valve, the fourth regulating valve and the components, and closes the second regulating valve and the third regulating valve; if the current electrical load is the rated electrical load, the controller closes the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve and the components; if the current electrical load is greater than the rated electrical load, the controller closes the first regulating valve, the fourth regulating valve and the components, and opens the second regulating valve and the third regulating valve.

[0123] In the present application, the hot side of the first heat exchanger is connected to the heating equipment through a preset power transmission line, and a circuit valve is provided on the preset power transmission line. The first heat exchanger can be an electric molten salt heat exchanger. The heat-using equipment includes a second steam turbine, a second generator, a second condenser and a second deaerator. The second generator is connected to the power grid system to transmit electricity to the power grid system; the cold side outlet of the second heat exchanger is connected to the inlet of the second steam turbine through a fifth pipeline, and a fifth regulating valve is provided on the fifth pipeline. The second steam turbine is connected to the second generator by transmission; the exhaust port of the second steam turbine is connected to the hot side inlet of the second condenser; the hot side outlet of the second condenser is connected to the inlet of the second deaerator; the outlet of the second deaerator is connected to the cold side inlet of the second heat exchanger; the controller is electrically connected to the fifth regulating valve.

[0124] The regulating valves and components may include a first regulating valve, a second regulating valve, a third regulating valve, a fourth regulating valve and components, and may further include a fifth regulating valve.

[0125] When the current electric load is less than the rated electric load, the controller opens the first regulating valve, the fourth regulating valve and the circuit valve, and closes the second regulating valve, the third regulating valve and the fifth regulating valve. High-temperature steam with a large amount of heat energy only enters the first steam turbine to drive it to rotate. The steam with reduced temperature and pressure in the first steam turbine is sent to the first condenser for condensation. During the operation of the first steam turbine, part of the steam is extracted and used to heat condensate, deoxidize and further heat. The water condensed in the first condenser is sent to the low-pressure heater for preheating. The preheated water enters the first deaerator for deoxidation. The deoxidized water is sent to the high-pressure heater for further heating. The heated water eventually returns to the nuclear island to continue the cycle. The first steam turbine is connected to the first generator in a transmission manner, and the rotational kinetic energy of the first steam turbine is transmitted to the first generator through the transmission device to drive it to generate electricity. When the electric load of the power grid system is less than the rated electric load, part of the electric energy generated by the first generator is transmitted to the power grid system, and the other part of the electric energy generated by the first generator can be supplied to the electric molten salt heat exchanger through the preset power transmission line to heat the molten salt. The high-temperature molten salt obtained after heating can be transported to the high-temperature molten salt tank, which stores the high-temperature molten salt. The low-temperature molten salt in the low-temperature molten salt tank can be transported to the cold side inlet of the first heat exchanger to continue heating and storing the molten salt. At this time, the second heat exchanger and the heat-using equipment are not running. This process can store excess heat energy.

[0126] When the current electric load is the rated electric load, the controller closes the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve, the circuit valve and the fifth regulating valve. High-temperature steam with a large amount of heat energy only enters the first steam turbine to drive it to rotate. The steam with reduced temperature and pressure in the first steam turbine is sent to the first condenser for condensation. During the operation of the first steam turbine, part of the steam is extracted and used to heat condensate, deoxidize and further heat. The water condensed in the first condenser is sent to the low-pressure heater for preheating. The preheated water enters the first deaerator for deoxidation. The deoxidized water is sent to the high-pressure heater for further heating. The heated water eventually returns to the nuclear island to continue the cycle. The first steam turbine is connected to the first generator by transmission, and the rotational kinetic energy of the first steam turbine is transmitted to the first generator through the transmission device to drive it to generate electricity. The power grid system is in normal operation, and all electrical equipment is working within its design range.

[0127] When the current electric load is greater than the rated electric load, the controller closes the first regulating valve, the fourth regulating valve and the components, and opens the second regulating valve, the third regulating valve and the fifth regulating valve. High-temperature steam with a large amount of heat energy only enters the first steam turbine to drive it to rotate. The steam with reduced temperature and pressure in the first steam turbine is sent to the first condenser for condensation. During the operation of the first steam turbine, part of the steam is extracted and used to heat condensate, deoxidize and further heat. The water condensed in the first condenser is sent to the low-pressure heater for preheating. The preheated water enters the first deaerator for deoxidation. The deoxidized water is sent to the high-pressure heater for further heating. The heated water eventually returns to the nuclear island to continue the cycle. The first steam turbine is connected to the first generator by transmission, and the rotational kinetic energy of the first steam turbine is transmitted to the first generator through the transmission device to drive it to generate electricity. The power grid system is in an overloaded state. The high-temperature molten salt in the high-temperature molten salt tank can be transported to the second heat exchanger, and the second heat exchanger performs heat exchange on the high-temperature molten salt. The steam heated by the second heat exchanger enters the inlet of the second steam turbine, which is used to drive the steam turbine to rotate, and then drive the second generator to generate electricity. The electricity generated by the second generator can be transmitted to the power grid system, which is also responsible for transmitting electricity to various power consumption points, including homes, enterprises, public facilities, etc., reducing the pressure on the power grid system. The second condenser receives the low-temperature steam discharged by the second steam turbine and condenses it into water. The second deaerator receives the condensed water from the second condenser, removes the dissolved oxygen in the water, prevents oxygen from corroding the equipment, and adjusts the water temperature to provide suitable conditions for the water entering the second heat exchanger to continue circulating.

[0128] The present application also provides an electronic device in an embodiment. Figure 8As shown, it shows a schematic diagram of the structure of an electronic device suitable for implementing the embodiment of the present application. The electronic device in the embodiment of the present application may include but is not limited to fixed terminals such as mobile phones, laptops, PDAs (personal digital assistants), PADs (tablet computers), desktop computers, etc. Figure 8 The electronic device shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0129] like Figure 8 As shown, the electronic device may include a processing device (e.g., a central processing unit, a graphics processing unit, etc.) 801, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 802 or a program loaded from a storage device 808 to a random access memory (RAM) 803. When the electronic device is powered on, various programs and data required for the operation of the electronic device are also stored in the RAM 803. The processing device 801, the ROM 802, and the RAM 803 are connected to each other via a bus 804. An input / output (I / O) interface 805 is also connected to the bus 804.

[0130] Typically, the following devices may be connected to the I / O interface 805: input devices 806 including, for example, a touch screen, a touch pad, a keyboard, a mouse, a camera, a microphone, an accelerometer, a gyroscope, etc.; output devices 807 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; storage devices 808 including, for example, a memory card, a hard disk, etc.; and communication devices 809. The communication device 809 may allow the electronic device to communicate with other devices wirelessly or by wire to exchange data. Although Figure 8 An electronic device having various devices is shown, but it should be understood that it is not required to implement or possess all the devices shown. More or fewer devices may be implemented or possessed instead.

[0131] An embodiment of the present application also provides a computer program product including computer-readable instructions. When the computer-readable instructions are executed on an electronic device, the electronic device implements any heat exchange method provided in the embodiment of the present application.

[0132] A computer-readable storage medium is also provided in an embodiment of the present application. The storage medium carries one or more computer programs. When the one or more computer programs are executed by an electronic device, the electronic device can implement any heat exchange method provided in the embodiment of the present application.

[0133] It should also be noted that the device embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed over multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. In addition, in the drawings of the device embodiments provided by the present application, the connection relationship between the modules indicates that there is a communication connection between them, which may be specifically implemented as one or more communication buses or signal lines.

[0134] Through the description of the above implementation mode, the technicians in the field can clearly understand that the present application can be implemented by means of software plus necessary general hardware, and of course, it can also be implemented by special hardware including special integrated circuits, special CPUs, special memories, special components, etc. In general, all functions completed by computer programs can be easily implemented by corresponding hardware, and the specific hardware structure used to implement the same function can also be various, such as analog circuits, digital circuits or special circuits. However, for the present application, software program implementation is a better implementation mode in more cases. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a readable storage medium, such as a computer floppy disk, a U disk, a mobile hard disk, a ROM, a RAM, a disk or an optical disk, etc., including a number of instructions to enable a computer device (which can be a personal computer, a training device, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0135] In the above embodiments, all or part of the embodiments may be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments may be implemented in the form of a computer program product.

[0136] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website site, a computer, a training device, or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, training device, or data center. The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a training device, a data center, etc. that includes one or more available media integrations. The available medium may be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive (SSD)), etc.

Claims

1. A heat exchange system, characterized in that: The heat exchange system is connected to the heat supply equipment and the heat use equipment respectively, and the heat supply equipment and the heat use equipment are both connected to the power grid system to transmit electricity to the power grid system. The heat exchange system includes: a controller, a first heat exchanger, a high-temperature storage tank, a second heat exchanger and a low-temperature storage tank; The hot side of the first heat exchanger is connected to the heat supply device via a preset energy transmission path, and the preset energy transmission path is provided with a component for controlling energy transmission in the preset energy transmission path; The cold side outlet of the first heat exchanger is connected to the inlet of the high temperature storage tank through a first pipeline, and a first regulating valve is provided on the first pipeline; The outlet of the high-temperature storage tank is connected to the hot side inlet of the second heat exchanger through a second pipeline, and a second regulating valve is provided on the second pipeline; The hot side outlet of the second heat exchanger is connected to the inlet of the low-temperature storage tank through a third pipeline, the cold side inlet and the cold side outlet of the second heat exchanger are both connected to the heat-using equipment, and a third regulating valve is provided on the third pipeline; The outlet of the low-temperature storage tank is connected to the cold side inlet of the first heat exchanger through a fourth pipeline, and a fourth regulating valve is provided on the fourth pipeline; The controller is electrically connected to the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve and the components, respectively.

2. The heat exchange system according to claim 1, characterized in that: The high-temperature storage tank is a high-temperature molten salt tank, the low-temperature storage tank is a low-temperature molten salt tank, and the transmission medium of the heat exchange system is molten salt.

3. The heat exchange system according to claim 2, characterized in that: The preset energy transmission path is a preset power transmission line or a preset heat energy transmission pipeline; The hot side of the first heat exchanger is connected to the heating equipment through the preset power transmission line, a circuit valve is provided on the preset power transmission line, and the first heat exchanger is an electric molten salt heat exchanger; or, The hot side of the first heat exchanger is connected to the heating equipment through the preset heat energy transmission pipeline, and a pipeline regulating valve is provided on the preset heat energy transmission pipeline. The first heat exchanger is a steam-water molten salt heat exchanger.

4. The heat exchange system according to claim 3, characterized in that: The heat supply equipment includes a nuclear island, a first steam turbine, a first condenser, a low-pressure heater, a first deaerator, a high-pressure heater and a first generator, wherein the first generator is connected to the power grid system to deliver electricity to the power grid system; In the case where the preset energy transmission path is the preset power transmission line, the main steam outlet of the nuclear island is connected to the main steam inlet of the first steam turbine, the exhaust port of the first steam turbine is connected to the hot side inlet of the first condenser, the extraction port of the first steam turbine is respectively connected to the hot side inlet of the low-pressure heater, the hot side inlet of the first deaerator and the hot side inlet of the high-pressure heater, the hot side outlet of the first condenser is connected to the cold side inlet of the low-pressure heater, the cold side outlet of the low-pressure heater is connected to the cold side inlet of the first deaerator, the outlet of the first deaerator is connected to the cold side inlet of the high-pressure heater, the cold side outlet of the high-pressure heater is connected to the feed water inlet of the nuclear island, the first steam turbine is drivingly connected to the first generator, and the first generator is connected to the molten salt heat exchanger through the preset power transmission line; and / or, In the case where the preset energy transmission pathway is a preset heat energy transmission pipeline, the main steam outlet of the nuclear island is connected to the main steam inlet of the first steam turbine, the main steam outlet of the nuclear island is connected to the hot side inlet of the steam-water molten salt heat exchanger through the first preset pipeline in the preset heat energy transmission pipeline, the exhaust port of the first steam turbine is connected to the hot side inlet of the first condenser, the extraction port of the first steam turbine is respectively connected to the hot side inlet of the low-pressure heater, the hot side inlet of the first deaerator and the hot side inlet of the high-pressure heater, the hot side outlet of the steam-water molten salt heat exchanger is connected to the inlet of the first condenser, the hot side outlet of the first condenser is connected to the cold side inlet of the low-pressure heater, the cold side outlet of the low-pressure heater is connected to the cold side inlet of the first deaerator, the outlet of the first deaerator is connected to the cold side inlet of the high-pressure heater, the cold side outlet of the high-pressure heater is connected to the feed water inlet of the nuclear island, the first steam turbine is drivingly connected to the first generator, and the pipeline regulating valve is provided on the first preset pipeline.

5. The heat exchange system according to claim 4, characterized in that: In the case where the preset energy transmission path is a preset heat energy transmission pipeline, the heat supply device further comprises a heat network heater, and the cold side inlet and the cold side outlet of the heat network heater are both connected to the heat network system to supply heat to the heat network system; The main steam outlet of the nuclear island is connected to the hot side inlet of the heat network heater; The hot side outlet of the heating network heater is connected to the inlet of the first condenser.

6. The heat exchange system according to claim 5, characterized in that: In the case where the preset energy transmission path is a preset heat energy transmission pipeline, the heat-using equipment includes a second steam turbine, a second generator, a second condenser, a second deaerator, a feed water tank and a seawater desalination and desalination device, and the second generator is connected to the power grid system to transmit electricity to the power grid system; The cold side outlet of the second heat exchanger is connected to the inlet of the second steam turbine through a fifth pipeline, the cold side outlet of the second heat exchanger is connected to the user-end device through a sixth pipeline, the cold side outlet of the second heat exchanger is connected to the steam inlet of the first steam turbine through a seventh pipeline, a fifth regulating valve is provided on the fifth pipeline, a sixth regulating valve is provided on the sixth pipeline, a seventh regulating valve is provided on the seventh pipeline, and the second steam turbine is drivingly connected to the second generator; The exhaust port of the second steam turbine is connected to the hot side inlet of the second condenser; The hot side outlet of the second condenser is connected to the inlet of the second deaerator; The outlet of the seawater desalination and desalination device is connected to the inlet of the water supply tank; The outlet of the water supply tank is connected to the inlet of the second deaerator through an eighth pipeline, and an eighth regulating valve is provided on the eighth pipeline; The outlet of the second deaerator is connected to the cold side inlet of the second heat exchanger; The controller is electrically connected to the fifth regulating valve, the sixth regulating valve, the seventh regulating valve, and the eighth regulating valve.

7. The heat exchange system according to claim 4, characterized in that: In the case where the preset energy transmission path is the preset power transmission line, the heat-using equipment includes a second steam turbine, a second generator, a second condenser and a second deaerator, and the second generator is connected to the power grid system to transmit power to the power grid system; The cold side outlet of the second heat exchanger is connected to the inlet of the second steam turbine through a fifth pipeline, a fifth regulating valve is provided on the fifth pipeline, and the second steam turbine is drivingly connected to the second generator; The exhaust port of the second steam turbine is connected to the hot side inlet of the second condenser; The hot side outlet of the second condenser is connected to the inlet of the second deaerator; The outlet of the second deaerator is connected to the cold side inlet of the second heat exchanger; The controller is electrically connected to the fifth regulating valve.

8. A heat exchange method, characterized in that: Applicable to the heat exchange system according to any one of claims 1 to 7, the method comprising: The controller obtains the current electrical load of the power grid system; The controller adjusts the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve, and the components based on the current electrical load and the rated electrical load to absorb heat through the second heat exchanger using a thermal device.

9. The heat exchange method according to claim 8, characterized in that: In the case where the preset energy transmission path is a preset heat energy transmission pipeline, the controller adjusts the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve and the components based on the current electrical load and the rated electrical load, including: If the current electrical load is less than the rated electrical load, the controller opens the first regulating valve, the fourth regulating valve and the component, and closes the second regulating valve and the third regulating valve; If the current electrical load is the rated electrical load, the controller closes the first regulating valve, the fourth regulating valve and the component, and opens the second regulating valve and the third regulating valve; If the current electrical load is greater than the rated electrical load, the controller closes the first regulating valve, the fourth regulating valve, and the component, and opens the second regulating valve and the third regulating valve.

10. The heat exchange method according to claim 8, characterized in that: In the case where the preset energy transmission path is the preset power transmission line, the controller adjusts the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve and the components based on the current electrical load and the rated electrical load, including: If the current electrical load is less than the rated electrical load, the controller opens the first regulating valve, the fourth regulating valve and the component, and closes the second regulating valve and the third regulating valve; If the current electrical load is the rated electrical load, the controller closes the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve and the component; If the current electrical load is greater than the rated electrical load, the controller closes the first regulating valve, the fourth regulating valve, and the component, and opens the second regulating valve and the third regulating valve.

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