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 low-temperature storage tank, a second heat exchanger and a plurality of pipelines, and regulating valves are arranged on the pipelines. The hot sides of the first heat exchangers are connected with heat supply equipment; 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 cold side outlet of the first heat exchanger 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. When the operation state of the heat supply equipment is abnormal, the regulating valve is regulated through the controller, the high-temperature storage tank can continuously provide heat energy for the heat utilization equipment, sudden shutdown of the heat utilization equipment is avoided, and the stability and reliability of the system are 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. As the core equipment for thermal energy transmission and utilization, the role of heat exchange system has become particularly critical.

[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, once the heating equipment stops working due to failure, maintenance or other reasons, the entire heat exchange system will lose its heat source, causing the heat-using equipment to be unable to continue to obtain the necessary thermal energy, causing the operation of the heat-using equipment to stop, resulting in poor system stability and reliability. Summary of the invention

[0005] In view of the above problems, the present application provides a heat exchange system and method to improve the stability and reliability of the system. The specific scheme is as follows:

[0006] In a first aspect, the present application provides a heat exchange system, which is connected to a heat supply device and a heat consumption device respectively, and comprises: a controller, a first heat exchanger, a high temperature storage tank, a low temperature storage tank, a second heat exchanger and a plurality of pipelines, wherein the plurality of pipelines comprises a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a fifth pipeline and a sixth pipeline;

[0007] The hot side outlet and the hot side inlet of the first heat exchanger are both connected to the heating equipment;

[0008] 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 second pipeline in sequence, the first pipeline is provided with a first regulating valve, and the second pipeline is provided with a second regulating valve;

[0009] The outlet of the high-temperature storage tank is connected to the hot side inlet of the second heat exchanger through the third pipeline and the fourth pipeline in sequence, the first connection is connected to the second connection, the first connection is the connection between the first pipeline and the second pipeline, the second connection is the connection between the third pipeline and the fourth pipeline, and the third pipeline is provided with a third regulating valve;

[0010] The cold side outlet of the first heat exchanger is connected to the hot side inlet of the second heat exchanger through the first pipeline and the fourth pipeline in sequence;

[0011] The hot side outlet of the second heat exchanger is connected to the inlet of the low-temperature storage tank through the fifth pipeline, and the cold side inlet and the cold side outlet of the second heat exchanger are both connected to the heat-using equipment;

[0012] The outlet of the low-temperature storage tank is connected to the cold side inlet of the first heat exchanger through the sixth pipeline, and the sixth pipeline is provided with a fourth regulating valve;

[0013] The controller is electrically connected to the first regulating valve, the second regulating valve, the third regulating valve and the fourth regulating valve respectively.

[0014] 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.

[0015] In a possible implementation, the second heat exchanger includes a high-temperature molten salt heater, a sulfuric acid preheater and a high-temperature molten salt heat exchanger, the fourth pipeline includes a first sub-pipeline, a second sub-pipeline and a third sub-pipeline, and the fifth pipeline includes a fourth sub-pipeline, a fifth sub-pipeline and a sixth sub-pipeline;

[0016] The cold side outlet of the first heat exchanger is connected to the hot side inlet of the high-temperature molten salt heater through the first pipeline and the first sub-pipeline in sequence, the cold side outlet of the first heat exchanger is connected to the hot side inlet of the sulfuric acid preheater through the first pipeline and the second sub-pipeline in sequence, and the cold side outlet of the first heat exchanger is connected to the hot side inlet of the high-temperature molten salt heat exchanger through the first pipeline and the third sub-pipeline in sequence;

[0017] The outlet of the high-temperature molten salt tank is connected to the hot side inlet of the high-temperature molten salt heater through the third pipeline and the first sub-pipeline in sequence, the outlet of the high-temperature molten salt tank is connected to the hot side inlet of the sulfuric acid preheater through the third pipeline and the second sub-pipeline in sequence, and the outlet of the high-temperature molten salt tank is connected to the hot side inlet of the high-temperature molten salt heat exchanger through the third pipeline and the third sub-pipeline in sequence;

[0018] The inlet of the low-temperature molten salt tank is connected to the hot side outlet of the high-temperature molten salt heater through the fourth sub-pipeline, the inlet of the low-temperature molten salt tank is connected to the hot side outlet of the sulfuric acid preheater through the fifth sub-pipeline, and the inlet of the low-temperature molten salt tank is connected to the hot side outlet of the high-temperature molten salt heat exchanger through the sixth sub-pipeline.

[0019] In a possible implementation, a high-temperature molten salt pump is provided on the third pipeline, and a low-temperature molten salt pump is provided on the sixth pipeline.

[0020] In a possible implementation, the heat-using equipment includes at least one of a power supply equipment, a hydrogen production equipment and a steam supply equipment, the transmission medium of the power supply equipment is a supercritical carbon dioxide fluid, the transmission medium of the hydrogen production equipment is a sulfuric acid solution, and the transmission medium of the steam supply equipment is desalted water;

[0021] The cold side inlet and the cold side outlet of the high temperature molten salt heater are both connected to the power supply equipment;

[0022] The cold side inlet and the cold side outlet of the sulfuric acid preheater are both connected to the hydrogen production equipment;

[0023] The cold side inlet and the cold side outlet of the high-temperature molten salt heat exchanger are both connected to the steam supply equipment.

[0024] In a possible implementation, the power supply equipment includes: a steam turbine, a high-temperature regenerator, a low-temperature regenerator, a precooler, a main compressor, a recompressor, and a generator;

[0025] The cold side outlet of the high temperature molten salt heater is connected to the steam inlet of the steam turbine;

[0026] The steam exhaust port of the steam turbine is connected to the hot side inlet of the high-temperature regenerator, and the steam turbine is drivingly connected to the generator;

[0027] The hot side outlet of the high temperature regenerator is connected to the hot side inlet of the low temperature regenerator;

[0028] The hot side outlet of the low temperature regenerator is connected to the inlet of the precooler and the inlet of the recompressor respectively;

[0029] The outlet of the precooler is connected to the inlet of the main compressor;

[0030] The outlet of the main compressor is connected to the cold side inlet of the low-temperature regenerator;

[0031] The cold side outlet of the low temperature regenerator and the outlet of the recompressor are both connected to the cold side inlet of the high temperature regenerator;

[0032] The cold side outlet of the high temperature regenerator is connected to the cold side inlet of the high temperature molten salt heater.

[0033] In a possible implementation, the hydrogen production equipment includes: a sulfuric acid reactor;

[0034] The cold side outlet of the sulfuric acid preheater is connected to the inlet of the sulfuric acid reactor;

[0035] The outlet of the sulfuric acid reactor is connected to a user-end device to supply hydrogen to the user-end device.

[0036] In a possible implementation, the steam supply equipment includes: a seawater desalination and desalination device, a water feed tank and a deaerator;

[0037] The cold side inlet of the high temperature molten salt heat exchanger is connected to the outlet of the deaerator;

[0038] The inlet of the deaerator is connected to the outlet of the water supply tank;

[0039] The inlet of the water supply tank is connected to the outlet of the seawater desalination and desalination device;

[0040] The cold side outlet of the high-temperature molten salt heat exchanger is connected to the user-end device to supply heat to the user-end device.

[0041] 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:

[0042] The controller obtains the operating status of the heating equipment;

[0043] The controller adjusts the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve and the first heat exchanger based on the operating state of the heat supply device to absorb heat through the second heat exchanger using the heat supply device.

[0044] In a possible implementation, the controller adjusts the first regulating valve, the second regulating valve, the third regulating valve, and the fourth regulating valve based on the operating state of the heating equipment, including:

[0045] If the operating state of the heating equipment is normal, the controller opens the first regulating valve, the second regulating valve and the fourth regulating valve, and closes the third regulating valve;

[0046] If the operating state of the heating equipment is an abnormal state, the controller closes the first regulating valve, the second regulating valve and the fourth regulating valve, and opens the third regulating valve.

[0047] 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 the system comprises: a controller, a first heat exchanger, a high-temperature storage tank, a low-temperature storage tank, a second heat exchanger and a plurality of pipes, wherein the hot side outlet and the hot side inlet of the first heat exchanger are both connected to the heat supply device; the cold side outlet of the first heat exchanger is connected to the inlet of the high-temperature storage tank through a first pipe and a second pipe in sequence, a first regulating valve is provided on the first pipe, and a second regulating valve is provided on the second pipe; the outlet of the high-temperature storage tank is connected to the hot side inlet of the second heat exchanger through a third pipe and a fourth pipe in sequence, and the first connection is connected to the second connection , the first connection is the connection between the first pipeline and the second pipeline, the second connection is the connection between the third pipeline and the fourth pipeline, and the third pipeline is provided with a third regulating valve; the cold side outlet of the first heat exchanger is connected to the hot side inlet of the second heat exchanger through the first pipeline and the fourth pipeline in turn; the hot side outlet of the second heat exchanger is connected to the inlet of the low-temperature storage tank through the fifth pipeline, and the cold side inlet and the cold side outlet of the second heat exchanger are both connected to the heat-using equipment; the outlet of the low-temperature storage tank is connected to the cold side inlet of the first heat exchanger through the sixth pipeline, and the sixth pipeline is provided with a fourth regulating valve; the controller is electrically connected to the first regulating valve, the second regulating valve, the third regulating valve and the fourth regulating valve respectively. The first heat exchanger of the system can store heat energy in the high-temperature storage tank. When the operating state of the heating equipment is abnormal, the high-temperature storage tank can continue to provide heat energy to the heat-using equipment for a period of time through the second heat exchanger, avoiding the sudden shutdown of the heat-using equipment, which is conducive to improving the stability and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] 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.

[0049] Figure 1 A schematic diagram of the structure of a heat exchange system provided in an embodiment of the present application;

[0050] Figure 2 A schematic diagram of the structure of another heat exchange system provided in an embodiment of the present application;

[0051] Figure 3 A schematic diagram of the structure of another heat exchange system provided in an embodiment of the present application; Figure 4 A schematic flow chart of a heat exchange method is provided for an embodiment of the present application;

[0052] Figure 5 A schematic diagram of the hardware structure of a heat exchange device is provided for an embodiment of the present application.

[0053] Reference numerals:

[0054] 100-controller; 200-first heat exchanger; 300-high-temperature storage tank; 400-second heat exchanger; 500-low-temperature storage tank; 10-first pipeline; 20-second pipeline; 30-third pipeline; 40-fourth pipeline; 41-first sub-pipeline; 42-second sub-pipeline; 43-third sub-pipeline; 50-fifth pipeline; 51-fourth sub-pipeline; 52-fifth sub-pipeline; 53-sixth sub-pipeline; 60-sixth pipeline; 1-first regulating valve; 2-second regulating valve; 3-third regulating valve; 4-fourth regulating valve. DETAILED DESCRIPTION

[0055] 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.

[0056] 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.

[0057] 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.

[0058] In order to improve the stability and 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.

[0059] 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 and a heat-using device, respectively, and the system includes: a controller 100, a first heat exchanger 200, a high-temperature storage tank 300, a second heat exchanger 400, a low-temperature storage tank 500, and a plurality of pipelines, the plurality of pipelines including a first pipeline 10, a second pipeline 20, a third pipeline 30, a fourth pipeline 40, a fifth pipeline 50 and a sixth pipeline 60.

[0060] 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, a low-temperature storage tank 500 and six main pipelines (first pipeline 10 to sixth pipeline 60). The heat energy generated by the heating equipment is transferred to the heat-using equipment through the heat exchange process, thereby realizing the storage and recycling of heat energy.

[0061] The hot side outlet and the hot side inlet of the first heat exchanger 200 are both connected to the heating equipment.

[0062] In the present application, the first heat exchanger 200 is used to exchange heat between two media (usually liquid or gas) at different temperatures by 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. The heat of the heating equipment is taken out by the transmission medium of the heating equipment. The transmission medium of the heating equipment enters the hot side inlet of the first heat exchanger 200 and exchanges heat with the transmission medium of the heat exchange system to heat the transmission medium of the heat exchange system. After the heat exchange is completed, the temperature of the transmission medium of the heating equipment, which originally carries a large amount of heat energy, will decrease, and the transmission medium of the heating equipment will return to the heating equipment from the hot side outlet of the first heat exchanger 200 to continue the cycle.

[0063] It should be noted that a main pump is provided on the pipeline connecting the hot side outlet of the first heat exchanger 200 and the heating equipment. The heating equipment may be a high temperature gas-cooled reactor. The transmission medium of the heating equipment may be helium. The transmission medium of the heat exchange system is molten salt.

[0064] Specifically, a large amount of heat energy generated by the nuclear fuel in the high temperature gas-cooled reactor during the nuclear reaction can be carried out by helium, which enters the hot side inlet of the first heat exchanger 200 through a pipeline and exchanges heat with the molten salt to heat the molten salt. After the heat exchange is completed, the temperature of the helium that originally carries a large amount of heat energy will decrease, and the helium at the hot side outlet of the first heat exchanger 200 is transported back to the core of the high temperature gas-cooled reactor through the main pump to continue to participate in the heat energy transfer process.

[0065] 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 second pipeline 20 in sequence. The first pipeline 10 is provided with a first regulating valve 1, and the second pipeline 20 is provided with a second regulating valve 2.

[0066] In the present application, the first heat exchanger 200, the first pipeline 10, the second pipeline 20, and the high-temperature storage tank 300 together constitute a flow path for the transmission medium of the heat exchange system, which is used to transport the transmission medium of the heat exchange system after heat exchange treatment to the high-temperature storage tank 300 for storage.

[0067] 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.

[0068] Specifically, 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 second pipeline 20 in sequence. The controller 100 is electrically connected to the first regulating valve 1 and the second regulating valve 2 respectively. The controller 100 can control the flow direction of the high-temperature molten salt to meet specific process conditions by controlling the switches of the first regulating valve 1 and the second regulating valve 2.

[0069] The outlet of the high-temperature storage tank 300 is connected to the hot side inlet of the second heat exchanger 400 through the third pipe 30 and the fourth pipe 40 in sequence. The first connection is connected to the second connection. The first connection is the connection between the first pipe 10 and the second pipe 20. The second connection is the connection between the third pipe 30 and the fourth pipe 40. The third pipe 30 is provided with a third regulating valve 3.

[0070] In the present application, the second heat exchanger 400 is also used to exchange heat between two transmission media (usually liquid or gas) of different temperatures by heat conduction, convection or radiation, and the second heat exchanger 400 also has two independent fluid channels on the hot side and the cold side. The high-temperature storage tank 300, the third pipeline 30, the fourth pipeline 40, and the second heat exchanger 400 together constitute a flow path of the transmission medium of the heat exchange system, which is used to transport the transmission medium of the heat exchange system in the high-temperature storage tank 300 to the hot side inlet of the second heat exchanger 400 for further heat exchange.

[0071] Specifically, the high temperature molten salt in the high temperature molten salt tank can be sequentially transported to the second heat exchanger 400 through the third pipeline 30 and the fourth pipeline 40. The controller 100 is electrically connected to the third regulating valve 3, and the controller 100 can control the flow direction of the high temperature molten salt to meet specific process conditions by controlling the switch of the third regulating valve 3.

[0072] It should be noted that the first connection point and the second connection point may be physically connected, that is, the first pipeline 10 and the fourth pipeline 40 may be directly connected.

[0073] Furthermore, a high-temperature molten salt pump may be provided on the third pipeline 30. 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 flow from the high-temperature storage tank 300 to the third pipeline 30.

[0074] Among them, the second heat exchanger 400 may include a high-temperature molten salt heater 401, a sulfuric acid preheater 402 and a high-temperature molten salt heat exchanger 403, the fourth pipeline 40 includes a first sub-pipeline 41, a second sub-pipeline 42 and a third sub-pipeline 43, and the fifth pipeline 50 includes a fourth sub-pipeline 51, a fifth sub-pipeline 52 and a sixth sub-pipeline 53.

[0075] At this time, the outlet of the high-temperature storage tank 300 is connected to the hot side inlet of the second heat exchanger 400 through the third pipeline 30 and the fourth pipeline 40 in sequence, and it can be: the outlet of the high-temperature molten salt tank is connected to the hot side inlet of the high-temperature molten salt heater 401 through the third pipeline 30 and the first sub-pipeline 41 in sequence; the outlet of the high-temperature molten salt tank is connected to the hot side inlet of the sulfuric acid preheater 402 through the third pipeline 30 and the second sub-pipeline 42 in sequence; the outlet of the high-temperature molten salt tank is connected to the hot side inlet of the high-temperature molten salt heat exchanger 403 through the third pipeline 30 and the third sub-pipeline 43 in sequence.

[0076] The cold side outlet of the first heat exchanger 200 is connected to the hot side inlet of the second heat exchanger 400 through the first pipe 10 and the fourth pipe 40 in sequence.

[0077] In the present application, the first heat exchanger 200, the first pipeline 10, the fourth pipeline 40, and the second heat exchanger 400 together constitute a flow path of a transmission medium of a heat exchange system, which is used to transport the transmission medium of the heat exchange system after heat exchange treatment to the second heat exchanger 400 for further heat exchange.

[0078] Specifically, the high-temperature molten salt obtained after heat exchange can be sequentially transported to the second heat exchanger 400 through the first pipeline 10 and the fourth pipeline 40. The first pipeline 10 is provided with a first regulating valve 1, and the controller 100 is electrically connected to the first regulating valve 1. The controller 100 can control the flow direction of the high-temperature molten salt to meet specific process conditions by controlling the switch of the first regulating valve 1.

[0079] Among them, the second heat exchanger 400 may include a high-temperature molten salt heater 401, a sulfuric acid preheater 402 and a high-temperature molten salt heat exchanger 403, the fourth pipeline 40 includes a first sub-pipeline 41, a second sub-pipeline 42 and a third sub-pipeline 43, and the fifth pipeline 50 includes a fourth sub-pipeline 51, a fifth sub-pipeline 52 and a sixth sub-pipeline 53.

[0080] At this time, the cold side outlet of the first heat exchanger 200 is connected to the hot side inlet of the second heat exchanger 400 through the first pipe 10 and the fourth pipe 40 in sequence, which can be: the cold side outlet of the first heat exchanger 200 is connected to the hot side inlet of the high-temperature molten salt heater 401 through the first pipe 10 and the first sub-pipeline 41; the cold side outlet of the first heat exchanger 200 is connected to the hot side inlet of the sulfuric acid preheater 402 through the first pipe 10 and the second sub-pipeline 42; the cold side outlet of the first heat exchanger 200 is connected to the hot side inlet of the high-temperature molten salt heat exchanger 403 through the first pipe 10 and the third sub-pipeline 43.

[0081] The hot side outlet of the second heat exchanger 400 is connected to the inlet of the low-temperature storage tank 500 through the fifth pipe 50, and the cold side inlet and the cold side outlet of the second heat exchanger 400 are both connected to the heat-using equipment.

[0082] In the present application, the heated transmission medium of the heat exchange system enters the hot side inlet of the second heat exchanger 400 to exchange heat with the transmission medium of the heat-using device to heat the transmission medium of the heat-using device. After the heat exchange is completed, the temperature of the heated transmission medium of the heat exchange system will decrease, and the transmission medium of the heat exchange system is transported from the hot side outlet of the second heat exchanger 400 through the fifth pipeline 50 to the low-temperature storage tank 500 for storage.

[0083] It should be noted that the low temperature storage tank 500 is a relatively low temperature environment, and can store fluids that need to be stored at low temperatures. The low temperature storage tank 500 can be a low temperature molten salt tank.

[0084] Among them, the second heat exchanger 400 may include a high-temperature molten salt heater 401, a sulfuric acid preheater 402 and a high-temperature molten salt heat exchanger 403, the fourth pipeline 40 includes a first sub-pipeline 41, a second sub-pipeline 42 and a third sub-pipeline 43, and the fifth pipeline 50 includes a fourth sub-pipeline 51, a fifth sub-pipeline 52 and a sixth sub-pipeline 53. At this time, the hot side outlet of the second heat exchanger 400 is connected to the inlet of the low-temperature storage tank 500 through the fifth pipeline 50, which can be: the inlet of the low-temperature molten salt tank is connected to the hot side outlet of the high-temperature molten salt heater 401 through the fourth sub-pipeline 51; the inlet of the low-temperature molten salt tank is connected to the hot side outlet of the sulfuric acid preheater 402 through the fifth sub-pipeline 52; the inlet of the low-temperature molten salt tank is connected to the hot side outlet of the high-temperature molten salt heat exchanger 403 through the sixth sub-pipeline 53. Among them, the heat-using equipment is equipment that requires heat, and the heat-using equipment may include at least one of power supply equipment, hydrogen production equipment and steam supply equipment. The transmission medium of the power supply equipment is supercritical carbon dioxide fluid, the transmission medium of the hydrogen production equipment is sulfuric acid solution, and the transmission medium of the steam supply equipment is desalted water. 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.

[0085] The power supply equipment includes: a steam turbine, a high-temperature regenerator, a low-temperature regenerator, a precooler, a main compressor, a recompressor and a generator. The cold side outlet of the high-temperature molten salt heater is connected to the steam inlet of the steam turbine; the exhaust port of the steam turbine is connected to the hot side inlet of the high-temperature regenerator, and the steam turbine is connected to the generator by transmission; the hot side outlet of the high-temperature regenerator is connected to the hot side inlet of the low-temperature regenerator; the hot side outlet of the low-temperature regenerator is respectively connected to the inlet of the precooler and the inlet of the recompressor; the outlet of the precooler is connected to the inlet of the main compressor; the outlet of the main compressor is connected to the cold side inlet of the low-temperature regenerator; the cold side outlet of the low-temperature regenerator and the outlet of the recompressor are both connected to the cold side inlet of the high-temperature regenerator; the cold side outlet of the high-temperature regenerator is connected to the cold side inlet of the high-temperature molten salt heater. For the power generation process of the power supply equipment, the high-temperature molten salt enters the hot side inlet of the high-temperature molten salt heater 401 through the first sub-pipeline, and the thermal energy of the high-temperature molten salt is used as the heat source of the power supply equipment to exchange heat with the supercritical carbon dioxide fluid, completing the heating process in the supercritical carbon dioxide Brayton cycle to supply power to the power grid system.

[0086] The hydrogen production equipment includes: a sulfuric acid reactor. The cold side outlet of the sulfuric acid preheater is connected to the inlet of the sulfuric acid reactor; the outlet of the sulfuric acid reactor produces sulfur dioxide, which can be used as the raw material required for the Bunsen reaction in the hydrogen production process; the cold side inlet of the sulfuric acid preheater is connected to the sulfuric acid solution inlet pipeline. For the preheating process of the sulfuric acid solution in the hydrogen production equipment, the high-temperature molten salt enters the hot side inlet of the sulfuric acid preheater 402 through the second sub-pipeline, and the heat energy of the high-temperature molten salt is used as the heat source in the preheating stage of the hydrogen production equipment, and heat is exchanged with the sulfuric acid solution, and the sulfuric acid solution is heated to a temperature that meets the chemical reaction in the sulfuric acid reactor 402, completing the preheating process of the sulfuric acid solution to supply hydrogen to the user-end equipment.

[0087] The steam supply equipment includes: a desalination and desalting water device, a water supply tank and a deaerator. The cold side inlet of the high-temperature molten salt heat exchanger is connected to the outlet of the deaerator; the inlet of the deaerator is connected to the outlet of the water supply tank through a desalting water drive pump; the inlet of the water supply tank is connected to the outlet of the desalination and desalting water device; the cold side outlet of the high-temperature molten salt heat exchanger is connected to the user-end device through a heating steam pipeline to supply heat to the user-end device. For the heat exchange process of the steam supply equipment, the high-temperature molten salt enters the hot side inlet of the high-temperature molten salt heat exchanger 403 through the third sub-pipeline, and uses the thermal energy of the high-temperature molten salt as the heat source of the steam supply equipment to perform heat exchange with the desalted water, realize the preheating, evaporation and superheating process of the desalted water and generate water vapor to supply heat to the user-end equipment.

[0088] For easier understanding, please refer to Figure 3 , Figure 3 A schematic diagram of the structure of another heat exchange system provided in an embodiment of the present application.

[0089] At this time, the cold side inlet and cold side outlet of the second heat exchanger 400 are both connected to the heat-using equipment, which can be: the cold side inlet and cold side outlet of the high-temperature molten salt heater 401 are both connected to the power supply equipment; the cold side inlet and cold side outlet of the sulfuric acid preheater 402 are both connected to the hydrogen production equipment; the cold side inlet and cold side outlet of the high-temperature molten salt heat exchanger 403 are both connected to the steam supply equipment.

[0090] Specifically, the high-temperature molten salt enters the hot side inlet of the second heat exchanger 400 through a pipeline, and the heat energy of the high-temperature molten salt is used as a heat source for the power supply equipment, the hydrogen production equipment, and the steam supply equipment, and is heat exchanged with supercritical carbon dioxide fluid, sulfuric acid solution, and / or desalted water, respectively, so as to realize power generation of the power supply equipment, sulfur dioxide generation of the hydrogen production equipment, and hot steam heating of the steam supply equipment. After the heat exchange is completed, the temperature of the original high-temperature molten salt will decrease, and the low-temperature molten salt at the hot side outlet of the second heat exchanger 400 will be transported to the low-temperature molten salt tank through the fifth pipeline 50 for storage.

[0091] The outlet of the low-temperature storage tank 500 is connected to the cold-side inlet of the first heat exchanger 200 through a sixth pipeline 60 , and a fourth regulating valve 4 is provided on the sixth pipeline 60 .

[0092] In the present application, the cryogenic storage tank 500, the sixth pipeline 60, and the first heat exchanger 200 together constitute a flow path of a transmission medium of a heat exchange system, which is used to transport the transmission medium of the heat exchange system after heat exchange treatment again to the first heat exchanger 200 for continued circulation.

[0093] Specifically, the low-temperature molten salt in the low-temperature molten salt tank can be transported to the first heat exchanger 200 through the sixth pipeline 60. The sixth pipeline 60 is provided with a fourth regulating valve 4, and the controller 100 is electrically connected to the fourth regulating valve 4. The controller 100 can control the flow direction of the molten salt to meet specific process conditions by controlling the switch of the fourth regulating valve 4.

[0094] Furthermore, a low-temperature molten salt pump may be provided on the sixth pipeline 60. 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 in a flowing state in the sixth pipeline 60 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 sixth pipeline 60, thereby completing the circulation of the molten salt.

[0095] 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 includes: a controller, a first heat exchanger, a high-temperature storage tank, a low-temperature storage tank, a second heat exchanger and a plurality of pipelines, wherein the hot side outlet and the hot side inlet of the first heat exchanger are both connected to the heat supply device; 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 second pipeline in sequence, a first regulating valve is provided on the first pipeline, and a second regulating valve is provided on the second pipeline; the outlet of the high-temperature storage tank is connected to the hot side inlet of the second heat exchanger through a third pipeline and a fourth pipeline in sequence, the first connection is connected to the second connection, and the first The connection point is the connection point of the first pipeline and the second pipeline, the second connection point is the connection point of the third pipeline and the fourth pipeline, and the third pipeline is provided with a third regulating valve; the cold side outlet of the first heat exchanger is connected to the hot side inlet of the second heat exchanger through the first pipeline and the fourth pipeline in turn; the hot side outlet of the second heat exchanger is connected to the inlet of the low-temperature storage tank through the fifth pipeline, and the cold side inlet and the cold side outlet of the second heat exchanger are both connected to the heat-using equipment; the outlet of the low-temperature storage tank is connected to the cold side inlet of the first heat exchanger through the sixth pipeline, and the sixth pipeline is provided with a fourth regulating valve; the controller is electrically connected to the first regulating valve, the second regulating valve, the third regulating valve and the fourth regulating valve respectively. The first heat exchanger of the system can store heat energy in the high-temperature storage tank. When the operating state of the heating equipment is abnormal, the high-temperature storage tank can continue to provide heat energy to the heat-using equipment for a period of time through the second heat exchanger, avoiding the sudden shutdown of the heat-using equipment, which is conducive to improving the stability and reliability of the system.

[0096] 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.

[0097] Please see attached Figure 4 , Figure 4 A 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:

[0098] Step S101: The controller obtains the operating status of the heating equipment.

[0099] It should be noted that the operating status of the heating equipment includes normal status and abnormal status. The normal status refers to the status in which the heating equipment operates normally according to the expected target. The abnormal status refers to the status in which the heating equipment deviates from the normal operating status and cannot work according to the expected target. This status may be caused by a variety of factors, including but not limited to: equipment failure, external interference, improper human operation, etc.

[0100] In the present application, the controller can obtain the current status of the heating equipment in real time through sensors, communication interfaces or other monitoring means in order to make correct adjustment decisions.

[0101] Step S102: The controller adjusts the first regulating valve, the second regulating valve, the third regulating valve and the fourth regulating valve based on the operating state of the heating device, so as to use the thermal device to absorb heat through the second heat exchanger.

[0102] In the present application, efficient and safe operation of the heat exchange system under different operating conditions is ensured by real-time monitoring of the operating status of the heating equipment and controlling the switch of the first regulating valve.

[0103] When the operation state of the heating equipment is normal, the controller opens the first regulating valve, the second regulating valve and the fourth regulating valve, and closes the third regulating valve.

[0104] In the present application, when the operation state of the heating equipment is normal, the transmission medium of the part of the heat exchange system heated by the first heat exchanger passes through the first pipeline and the fourth pipeline to the second heat exchanger in turn for further heat exchange; the transmission medium of the other part of the heat exchange system heated by the first heat exchanger passes through the first pipeline and the second pipeline in turn to the high-temperature storage tank for heat storage. The heated transmission medium of the heat exchange system enters the hot side inlet of the second heat exchanger to exchange heat with the transmission medium of the heat-using equipment to heat the transmission medium of the heat-using equipment. After the heat exchange is completed, the temperature of the transmission medium of the heated heat exchange system will decrease, and the transmission medium of the heat exchange system is transported from the hot side outlet of the second heat exchanger to the low-temperature storage tank through the fifth pipeline for storage. The low-temperature molten salt in the low-temperature storage tank can be transported to the first heat exchanger through the sixth pipeline to continue the cycle. This method can realize energy storage in the high-temperature storage tank while providing heat energy to the heat-using equipment, so as to realize full utilization of heat energy.

[0105] When the operation state of the heating equipment is abnormal, the controller closes the first regulating valve, the second regulating valve and the fourth regulating valve, and opens the third regulating valve.

[0106] In the present application, when the operation state of the heating equipment is abnormal, the heating equipment may have problems such as performance degradation and efficiency reduction, and the controller needs to continue to provide heat energy to the heating equipment by controlling the relevant regulating valve. The transmission medium of the heat exchange system heated in the high-temperature storage tank can be transported to the second heat exchanger through the third pipeline and the fourth pipeline in sequence for further heat exchange. This method can continue to use the high-temperature storage tank to provide heat energy to the heating equipment when the first heat exchanger is not in operation.

[0107] The present application also provides an electronic device in an embodiment. Figure 5As 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 5 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.

[0108] like Figure 5 As shown, the electronic device may include a processing device (e.g., a central processing unit, a graphics processing unit, etc.) 501, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 502 or a program loaded from a storage device 508 to a random access memory (RAM) 503. 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 503. The processing device 501, the ROM 502, and the RAM 503 are connected to each other via a bus 504. An input / output (I / O) interface 505 is also connected to the bus 504.

[0109] Typically, the following devices may be connected to the I / O interface 505: an input device 506 including, for example, a touch screen, a touch pad, a keyboard, a mouse, a camera, a microphone, an accelerometer, a gyroscope, etc.; an output device 507 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; a storage device 508 including, for example, a memory card, a hard disk, etc.; and a communication device 509. The communication device 509 may allow the electronic device to communicate with other devices wirelessly or by wire to exchange data. Although Figure 5 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.

[0110] 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.

[0111] 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.

[0112] 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.

[0113] 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.

[0114] 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.

[0115] 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 system includes: a controller, a first heat exchanger, a high temperature storage tank, a low temperature storage tank, a second heat exchanger and a plurality of pipelines, wherein the plurality of pipelines include a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a fifth pipeline and a sixth pipeline; The hot side outlet and the hot side inlet of the first heat exchanger are both connected to the heating equipment; 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 second pipeline in sequence, the first pipeline is provided with a first regulating valve, and the second pipeline is provided with a second regulating valve; The outlet of the high-temperature storage tank is connected to the hot side inlet of the second heat exchanger through the third pipeline and the fourth pipeline in sequence, the first connection is connected to the second connection, the first connection is the connection between the first pipeline and the second pipeline, the second connection is the connection between the third pipeline and the fourth pipeline, and the third pipeline is provided with a third regulating valve; The cold side outlet of the first heat exchanger is connected to the hot side inlet of the second heat exchanger through the first pipeline and the fourth pipeline in sequence; The hot side outlet of the second heat exchanger is connected to the inlet of the low-temperature storage tank through the fifth pipeline, and the cold side inlet and the cold side outlet of the second heat exchanger are both connected to the heat-using equipment; The outlet of the low-temperature storage tank is connected to the cold side inlet of the first heat exchanger through the sixth pipeline, and the sixth pipeline is provided with a fourth regulating valve; The controller is electrically connected to the first regulating valve, the second regulating valve, the third regulating valve and the fourth regulating valve 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 second heat exchanger includes a high-temperature molten salt heater, a sulfuric acid preheater and a high-temperature molten salt heat exchanger, the fourth pipeline includes a first sub-pipeline, a second sub-pipeline and a third sub-pipeline, and the fifth pipeline includes a fourth sub-pipeline, a fifth sub-pipeline and a sixth sub-pipeline; The cold side outlet of the first heat exchanger is connected to the hot side inlet of the high-temperature molten salt heater through the first pipeline and the first sub-pipeline in sequence, the cold side outlet of the first heat exchanger is connected to the hot side inlet of the sulfuric acid preheater through the first pipeline and the second sub-pipeline in sequence, and the cold side outlet of the first heat exchanger is connected to the hot side inlet of the high-temperature molten salt heat exchanger through the first pipeline and the third sub-pipeline in sequence; The outlet of the high-temperature molten salt tank is connected to the hot side inlet of the high-temperature molten salt heater through the third pipeline and the first sub-pipeline in sequence, the outlet of the high-temperature molten salt tank is connected to the hot side inlet of the sulfuric acid preheater through the third pipeline and the second sub-pipeline in sequence, and the outlet of the high-temperature molten salt tank is connected to the hot side inlet of the high-temperature molten salt heat exchanger through the third pipeline and the third sub-pipeline in sequence; The inlet of the low-temperature molten salt tank is connected to the hot side outlet of the high-temperature molten salt heater through the fourth sub-pipeline, the inlet of the low-temperature molten salt tank is connected to the hot side outlet of the sulfuric acid preheater through the fifth sub-pipeline, and the inlet of the low-temperature molten salt tank is connected to the hot side outlet of the high-temperature molten salt heat exchanger through the sixth sub-pipeline.

4. The heat exchange system according to claim 1, characterized in that: The third pipeline is provided with a high-temperature molten salt pump, and the sixth pipeline is provided with a low-temperature molten salt pump.

5. The heat exchange system according to claim 3, characterized in that: The heat-using equipment includes at least one of a power supply equipment, a hydrogen production equipment and a steam supply equipment, wherein the transmission medium of the power supply equipment is a supercritical carbon dioxide fluid, the transmission medium of the hydrogen production equipment is a sulfuric acid solution, and the transmission medium of the steam supply equipment is a desalted water; The cold side inlet and the cold side outlet of the high temperature molten salt heater are both connected to the power supply equipment; The cold side inlet and the cold side outlet of the sulfuric acid preheater are both connected to the hydrogen production equipment; The cold side inlet and the cold side outlet of the high-temperature molten salt heat exchanger are both connected to the steam supply equipment.

6. The heat exchange system according to claim 5, characterized in that: The power supply equipment includes: a steam turbine, a high-temperature regenerator, a low-temperature regenerator, a precooler, a main compressor, a recompressor and a generator; The cold side outlet of the high temperature molten salt heater is connected to the steam inlet of the steam turbine; The steam exhaust port of the steam turbine is connected to the hot side inlet of the high-temperature regenerator, and the steam turbine is drivingly connected to the generator; the hot side outlet of the high-temperature regenerator is connected to the hot side inlet of the low-temperature regenerator; The hot side outlet of the low temperature regenerator is connected to the inlet of the precooler and the inlet of the recompressor respectively; The outlet of the precooler is connected to the inlet of the main compressor; The outlet of the main compressor is connected to the cold side inlet of the low-temperature regenerator; The cold side outlet of the low temperature regenerator and the outlet of the recompressor are both connected to the cold side inlet of the high temperature regenerator; The cold side outlet of the high temperature regenerator is connected to the cold side inlet of the high temperature molten salt heater.

7. The heat exchange system according to claim 5, characterized in that: The hydrogen production equipment comprises: a sulfuric acid reactor; The cold side outlet of the sulfuric acid preheater is connected to the inlet of the sulfuric acid reactor; The outlet of the sulfuric acid reactor is connected to a user-end device to supply hydrogen to the user-end device.

8. The heat exchange system according to claim 5, characterized in that: The steam supply equipment includes: seawater desalination and desalination equipment, water supply tank and deaerator; The cold side inlet of the high temperature molten salt heat exchanger is connected to the outlet of the deaerator; The inlet of the deaerator is connected to the outlet of the water supply tank; The inlet of the water supply tank is connected to the outlet of the seawater desalination and desalination device; The cold side outlet of the high-temperature molten salt heat exchanger is connected to the user-end equipment to supply heat to the user-end equipment.

9. A heat exchange method, characterized in that: Applicable to the heat exchange system according to any one of claims 1 to 8, the method comprising: The controller obtains the operating status of the heating equipment; The controller adjusts the first regulating valve, the second regulating valve, the third regulating valve and the fourth regulating valve based on the operating state of the heat supply device to absorb heat through the second heat exchanger using the heat supply device.

10. The method according to claim 9, characterized in that The controller adjusts the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve and the first heat exchanger based on the operating state of the heating equipment, including: If the operating state of the heating equipment is normal, the controller opens the first regulating valve, the second regulating valve and the fourth regulating valve, and closes the third regulating valve; If the operating state of the heating equipment is an abnormal state, the controller closes the first regulating valve, the second regulating valve and the fourth regulating valve, and opens the third regulating valve.

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