Testing system and testing method for testing high-temperature molten salt pump

Abstract

The embodiment of the invention relates to the technical field of testing of liquid pumps, in particular to a testing system and a testing method for testing a high-temperature molten salt pump, firstly, the testing system for testing the high-temperature molten salt pump comprises a salt manufacturing and storing piece, a pressure sensor, a pressure sensor and a controller, the molten salt preparation module is used for preparing molten salt for testing and storing the prepared molten salt; the high-temperature molten salt pump is arranged in the accommodating part; the fused salt output part is used for receiving the fused salt from the salt manufacturing and storing part and inputting the fused salt into the containing part, and when the containing part is filled with the fused salt, the high-temperature fused salt pump is started to operate; and the fused salt input part is used for receiving the fused salt from the fused salt output part and enabling the fused salt to flow back to the fused salt output part. Secondly, the invention provides a testing method for testing the high-temperature molten salt pump. According to the testing system, the testing system for high-temperature molten salt transportation circulation can be built, the technological parameters of the high-temperature molten salt pump can be measured in the circulation process, and the performance testing precision of the high-temperature molten salt pump can be improved.

Description

Technical Field

[0001] The embodiments of this application relate to the field of liquid pump testing technology, specifically to a testing system and testing method for testing high-temperature molten salt pumps. Background Technology

[0002] The statements herein are provided merely as background information in connection with this application and do not necessarily constitute prior art.

[0003] High-temperature molten salt pumps are critical fluid transfer devices used to extract high-temperature molten salt from storage containers and transport it to a predetermined location through a pipeline system. They typically need to be resistant to high temperatures and corrosion and be able to operate stably in extreme environments. Therefore, performance testing is required before putting high-temperature molten salt pumps into use to ensure that they meet the predetermined requirements. However, existing testing systems for high-temperature molten salt pump performance testing still have many problems, making it difficult to accurately evaluate and judge the performance of the tested high-temperature molten salt pumps. Summary of the Invention

[0004] A brief overview of this application is provided below to offer a basic understanding of certain aspects thereof. It should be understood that this overview is not an exhaustive summary of the application. It is not intended to identify key or essential parts of the application, nor is it intended to limit its scope. Its purpose is merely to present certain concepts in a simplified form as a prelude to the more detailed description that follows.

[0005] In a first aspect, embodiments of this application provide a test system for testing a high-temperature molten salt pump, comprising: a salt preparation and storage unit configured to prepare molten salt for testing and store the prepared molten salt; a container in which the high-temperature molten salt pump is disposed; a molten salt output unit configured to receive molten salt from the salt preparation and storage unit and input the molten salt into the container, wherein the high-temperature molten salt pump starts operating when the container is full of molten salt; a molten salt input unit configured to receive molten salt from the molten salt output unit and to allow the molten salt to flow back to the molten salt output unit; a pressure supply unit configured to provide pressure to output the molten salt from the salt preparation and storage unit to the molten salt output unit; and a pipeline configured to fluidly connect the salt preparation and storage unit, the container, the molten salt output unit, and the molten salt input unit.

[0006] Secondly, embodiments of this application provide a test method for testing a high-temperature molten salt pump. This test method uses the test system of any embodiment of the first aspect of this application and includes the following steps: S10: transferring molten salt into a salt-making and storage component; S20: evacuating the test system and then introducing argon gas after evacuation; S30: heating the salt-making and storage component to form a high-temperature liquid molten salt; S40: allowing the molten salt to enter from the salt-making and storage component to the molten salt output component, and circulating the molten salt between the container, the molten salt output component, and the molten salt input component via the high-temperature molten salt pump; S50: testing the high-temperature molten salt pump during the molten salt circulation process in step S40.

[0007] The testing system of this application can build a testing system for high-temperature molten salt transportation cycle, so as to measure the process parameters such as flow rate, head and pressure of high-temperature molten salt pump during the cycle, which helps to improve the performance testing accuracy of high-temperature molten salt pump in transporting liquid molten salt, grasp the actual performance of the tested high-temperature molten salt pump, and effectively ensure the safety and stability of the tested high-temperature molten salt pump operation. Attached Figure Description

[0008] Other objects and advantages of this application will become apparent from the following description of embodiments of this application with reference to the accompanying drawings, and will help to provide a comprehensive understanding of this application.

[0009] Figure 1 This is a schematic diagram of the structure of a test system according to an embodiment of this application;

[0010] Figure 2 This is a schematic diagram of the structure of a salt-making and salt-storage component according to an embodiment of this application;

[0011] Figure 3 This is a schematic diagram of the structure in which the salt production and storage component and the molten salt output component are connected by a pipeline according to an embodiment of this application;

[0012] Figure 4 This is a schematic diagram of the structure of a container supported by a support member and a high-temperature molten salt pump connected to a molten salt output member via a pipeline, according to an embodiment of this application.

[0013] Explanation of reference numerals in the attached figures:

[0014] 10. Salt production and storage component; 11. Main body; 111. First sealing head; 112. Reception section; 113. Second sealing head; 12. Liner; 13. Support leg; 14. Connecting pipe; 20. Reception component; 30. Molten salt output component; 40. Molten salt input component; 50. Pressure supply component; 60. Pipeline; 70. Support component; 71. Support plate; 72. First support rod; 73. Support frame; 74. Second support rod; 100. High-temperature molten salt pump.

[0015] It should be noted that the accompanying drawings are not necessarily drawn to scale, but are shown only in a schematic manner without affecting the reader's understanding. Detailed Implementation

[0016] Exemplary embodiments of this application will be described below with reference to the accompanying drawings. For clarity and brevity, not all features of actual implementations are described in the specification. However, it should be understood that many implementation-specific decisions must be made in the development of any such actual embodiment to achieve the developer's specific goals, such as complying with constraints related to the system and business, and these constraints may vary depending on the implementation. Furthermore, it should be understood that while development work can be very complex and time-consuming, such development work is merely a routine task for those skilled in the art who benefit from the content of this application.

[0017] It should also be noted that, in order to avoid obscuring this application with unnecessary details, only the equipment structure and / or processing steps closely related to the solution according to this application are shown in the accompanying drawings, while other details that are not closely related to this application are omitted.

[0018] The inventors of this application have discovered that there is currently no testing system in the prior art that can realize the high-temperature molten salt transport cycle and test the high-temperature molten salt pump during the molten salt cycle. This can easily affect the validity and accuracy of the high-temperature molten salt pump performance test data, thus making it impossible to accurately grasp the actual performance of the high-temperature molten salt pump under test.

[0019] Based on this, embodiments of this application provide a testing system for testing high-temperature molten salt pumps, such as... Figure 1 As shown, Figure 1 A schematic diagram of the test system according to an embodiment of this application is shown, which includes: a salt preparation and storage unit 10, a container 20, a molten salt output unit 30, a molten salt input unit 40, a pressure supply unit 50, and a pipeline 60. The salt preparation and storage unit 10 is configured to prepare molten salt for testing and to store the prepared molten salt; a high-temperature molten salt pump 100 is disposed within the container 20; the molten salt output unit 30 is configured to receive molten salt from the salt preparation and storage unit 10 and input the molten salt into the container 20, and the high-temperature molten salt pump 100 starts operating when the container 20 is full of molten salt; the molten salt input unit 40 is configured to receive molten salt from the molten salt output unit 30 and to allow the molten salt to flow back to the molten salt output unit 30; the pressure supply unit 50 is configured to provide pressure to output the molten salt from the salt preparation and storage unit 10 to the molten salt output unit 30; the pipeline 60 is configured to provide fluid communication between the salt preparation and storage unit 10, the container 20, the molten salt output unit 30, and the molten salt input unit 40.

[0020] The testing system provided in this application uses pressure provided by pressure supply component 50 to transport molten salt from salt production and storage component 10 to molten salt output component 30, and then from molten salt output component 30 to container 20. When container 20 is filled with molten salt, a high-temperature molten salt pump 100 installed in container 20 acts as a power source to transport molten salt from molten salt output component 30 to molten salt input component 40. By configuring molten salt input component 40 to allow molten salt to flow back to molten salt output component 30, molten salt forms a cycle between container 20, molten salt output component 30, and molten salt input component 40. Thus, a high-temperature molten salt transport cycle testing system is established to measure process parameters such as flow rate, head, and pressure of the high-temperature molten salt pump during the cycle. This helps to improve the performance testing accuracy of the high-temperature molten salt pump in transporting liquid molten salt, grasp the actual performance of the tested high-temperature molten salt pump, and effectively ensure the safety and stability of the tested high-temperature molten salt pump operation.

[0021] like Figure 2 As shown, Figure 2 The diagram illustrates the structure of a salt-making and storage component 10 according to an embodiment of this application. In some embodiments, the salt-making and storage component 10 includes a main body 11 and an inner liner 12, with the inner liner 12 formed within the main body 11. The main body 11 is configured to prepare molten salt and store the prepared molten salt. The salt-making and storage component 10 is used to prepare and store molten salt for testing. Since the molten salt can severely corrode the preparation container during the process of removing water and oxygen during salt making, the inner liner 12 is provided inside the main body 11 of the salt-making and storage component 10 to prevent severe corrosion of the salt-making and storage component 10 during the salt-making process.

[0022] like Figure 2 As shown, in some embodiments, the salt-making and storage component 10 includes a main body 11 and support legs 13. The support legs 13 are configured to support the main body 11, and the main body 11 is configured to prepare molten salt and store the prepared molten salt. By providing the support legs 13 to support the main body 11, the stability of the salt-making and storage component 10 is enhanced, while reducing the support surface, so as to facilitate heating and heat preservation of the main body 11 for preparing and storing molten salt.

[0023] In some embodiments, the pressure supply member 50 may be configured to provide pressure to cause the molten salt circulating between the containment member 20, the molten salt output member 30, and the molten salt input member 40 to flow back to the salt production and storage member 10, so that after the performance test of the high-temperature molten salt pump 100 is completed, the molten salt used for testing is collected in the salt production and storage member 10 for easy discharge of molten salt.

[0024] like Figure 2As shown, in some embodiments, the main body 11 includes a first sealing head 111, a receiving portion 112, and a second sealing head 113, with the receiving portion 112 disposed between the first sealing head 111 and the second sealing head 113; the first sealing head 111 and the receiving portion 112, and the receiving portion 112 and the second sealing head 113 are fixedly connected by welding; the inner liner 12 is formed on the first sealing head 111, the receiving portion 112, and the second sealing head 113, or the support leg portion 13 is configured to support the first sealing head 111 or the second sealing head 113.

[0025] Since the molten salt circulating between the container 20, the molten salt output component 30 and the molten salt input component 40 is collected in the salt making and storage component 10 after the test is completed, in this embodiment, the main body 11 of the salt making and storage component 10 is configured to include a first sealing head 111, a container 112 and a second sealing head 113, and the first sealing head 111 and the container 112 and the container 112 and the second sealing head 113 are fixedly connected by welding, so that the salt making and storage component 10 is configured as a vertical container to facilitate the discharge of molten salt.

[0026] like Figure 2 and Figure 3 As shown, Figure 3 The diagram illustrates the structure of the salt production and storage unit 10 and the molten salt output unit 30 connected by a pipeline 60 according to an embodiment of this application. In some embodiments, a connecting pipe 14 is formed in the first sealing head 111 or the second sealing head 113. The connecting pipe 14 is in fluid communication with the pipeline 60 to provide a channel for molten salt to enter and exit the receiving part 112, so that the molten salt is output to the molten salt output unit 30 through the connecting pipe 14 via the pipeline 60, or after the test is completed, the molten salt circulating between the receiving part 20, the molten salt output unit 30 and the molten salt input unit 40 is returned to the salt production and storage unit 10 through the pipeline 60 and the connecting pipe 14.

[0027] like Figure 1 and Figure 3 As shown, in some embodiments, the pipeline 60 connecting the salt-making and storage unit 10 and the molten salt output unit 30 is formed in a "Z" shape. Since the test system is used to conduct high-temperature tests on the high-temperature molten salt pump 100, the molten salt transported by the pipeline 60 is high-temperature liquid molten salt. In this embodiment, by setting the pipeline 60 connecting the salt-making and storage unit 10 and the molten salt output unit 30 in a "Z" shape, the pipeline load caused by thermal expansion is offset when the high-temperature liquid molten salt is transported from the salt-making and storage unit 10 to the molten salt output unit 30, ensuring the safe and stable operation of the test system.

[0028] In some embodiments, the pipeline 60 connecting the salt preparation and storage unit 10 and the molten salt input unit 40 is formed in a "Z" shape. Since the molten salt used for testing is a high-temperature liquid molten salt, in this embodiment, by setting the pipeline 60 connecting the salt preparation and storage unit 10 and the molten salt input unit 40 in a "Z" shape, the high-temperature liquid molten salt is transported from the molten salt input unit 40 to the salt preparation and storage unit 10 during the molten salt recovery process after the test is completed, thus offsetting the pipeline load caused by thermal expansion and further ensuring the safe and stable operation of the test system.

[0029] like Figure 1 As shown, in some embodiments, the pipe 60 connecting the molten salt output component 30 and the molten salt input component 40 is formed in a "Π" shape. Since the test system is used to conduct high-temperature tests on the high-temperature molten salt pump 100, the molten salt transported by the pipe 60 is high-temperature liquid molten salt. In this embodiment, by setting the pipe 60 connecting the molten salt output component 30 and the molten salt input component 40 in a "Π" shape, the pipe load caused by thermal expansion is offset when the high-temperature liquid molten salt is transported from the molten salt output component 30 to the molten salt input component 40 under the action of the high-temperature molten salt pump 100, further ensuring the safe and stable operation of the test system.

[0030] In some embodiments, at the corners of the pipe 60, the pipe 60 is configured to form rounded corners to reduce the flow resistance of molten salt, increase the flow rate, and avoid problems such as molten salt clogging of the pipe 60.

[0031] In some embodiments, the test system also includes a support 70, see [link to documentation]. Figure 4 , Figure 4 The diagram shows a structural schematic of an embodiment of this application, in which a container 20 supported by a support member 70 and a high-temperature molten salt pump 100 are connected to a molten salt output member 30 via a pipeline 60. The high-temperature molten salt pump 100 is fixed to the support member 70, so that the container 20 is suspended inside the support member 70, which facilitates the operation of the high-temperature molten salt pump 100 and provides power for transporting molten salt from the molten salt output member 30 to the molten salt input member 40.

[0032] like Figure 4As shown, in some embodiments, the support member 70 includes a support plate 71, a plurality of first support rods 72, a support frame 73, and a plurality of second support rods 74. The support plate 71 forms a through hole through which the high-temperature molten salt pump 100 passes and is fixed to the support plate 71. The support plate 71 is fixedly connected to one end of the plurality of first support rods 72, and the other end of the plurality of first support rods 72 is fixedly connected to one side of the support frame 73. The other side of the support frame 73 is fixedly connected to the plurality of second support rods 74. The plurality of second support rods 74 are perpendicular to the support frame 73, and the plurality of first support rods 72 form an acute angle with the support frame 73, so as to fix the high-temperature molten salt pump 100 disposed inside the receiving member 20 to the support plate 71. At the same time, the first support rods 72, the support frame 73, and the plurality of second support rods 74 constitute the receiving space of the receiving member 20, so that the receiving member 20 can be suspended in the receiving space.

[0033] Furthermore, the support plate 71, the first support rod 72, the support frame 73, and the second support rod 74 are fixedly connected by welding to form good rigidity.

[0034] Embodiments of this application also provide a test method for testing a high-temperature molten salt pump. This test method employs the test system of any embodiment of the first aspect of this application and includes the following steps S10 to S50:

[0035] S10: Transfer the molten salt into the salt production and storage unit 10.

[0036] S20: Evacuate the test system and then introduce argon gas after evacuation is complete.

[0037] S30: Heat the salt storage unit 10 to make the molten salt form a high-temperature liquid molten salt.

[0038] S40: Molten salt is introduced from the salt storage unit 10 to the molten salt output unit 30. The molten salt is circulated between the container 20, the molten salt output unit 30 and the molten salt input unit 40 by the high-temperature molten salt pump 100. The high-temperature molten salt pump 100 is tested during the molten salt circulation process.

[0039] The method provided in the embodiments of this application utilizes a test system capable of realizing high-temperature molten salt transport cycle to measure the process parameters of the high-temperature molten salt pump 100 during the circulation of high-temperature liquid molten salt between the container 20, the molten salt output component 30, and the molten salt input component 40. This simulates the long-term operating conditions of the high-temperature molten salt pump, thereby completing the long-cycle test of the high-temperature molten salt pump, obtaining accurate and effective test data, and facilitating the understanding and evaluation of the actual performance of the tested high-temperature molten salt pump.

[0040] In some embodiments, the test method may further include: S00: performing a sealing and pressure holding test on the test system before transferring the molten salt into the salt production and storage unit 10.

[0041] In some embodiments, step S00 further includes the following step:

[0042] S01: Adjust the pressure value in the test system to the first predetermined value.

[0043] S02: Close the outlet valves of the salt production and storage unit 10, the container unit 20, the molten salt output unit 30, and the molten salt input unit 40.

[0044] S03: Open the shutdown seal of the high-temperature molten salt pump 100.

[0045] S04: Detect the pressure changes in each branch formed by the interconnection between the salt production and storage component 10, the container 20, the molten salt output component 30, and the molten salt input component 40.

[0046] S05: After waiting for the predetermined time, confirm that the pressure of each branch has not changed and that the pressure is the second predetermined value.

[0047] In this embodiment, the pressure value of the test system is adjusted to a first predetermined value, and the outlet valves of the salt-making and storage component 10, the container 20, the molten salt output component 30, and the molten salt input component 40 are closed. The shutdown seal of the high-temperature molten salt pump 100 is opened. After a predetermined time, the pressure value of each branch interconnected between the salt-making and storage component 10, the container 20, the molten salt output component 30, and the molten salt input component 40 remains unchanged or changes to a second predetermined value. A sealing and pressure-holding test is then performed on the test system to promptly detect and resolve potential leakage problems, ensure the pressure resistance and sealing effect of the test system, and thereby improve the accuracy of the performance test of the high-temperature molten salt pump 100.

[0048] In step S04, the pressure change of each branch is detected. When the pressure change is small and tends to stabilize, the current pressure value of each branch is recorded. In step S05, after waiting for a predetermined period, the current pressure value of each branch is recorded again. When the current pressure value is determined to be unchanged compared to the pressure value recorded in step S04, or to drop to the second predetermined value, it can be determined that the pressure resistance and sealing performance of the test environment meet the predetermined requirements.

[0049] In some embodiments, the second predetermined value is half of the first predetermined value. For example, in step S01, when the pressure value in the test environment is adjusted to 0.1 MPa, in step S05, it is necessary to determine that the pressure value of each branch can reach 0.05 MPa, so as to ensure that the pressure resistance and sealing performance of the test environment meet the predetermined requirements of the high-temperature molten salt pump performance test.

[0050] In some embodiments, step S20 further includes the following step:

[0051] S21: Argon gas is introduced into the salt production and storage unit 10, the container 20, the molten salt output unit 30, the molten salt input unit 40, and the pipeline 60 using the pressure supply unit 50.

[0052] S22: Stop the input of argon gas and evacuate the salt-making and storage unit 10, the container 20, the molten salt output unit 30, the molten salt input unit 40 and the pipeline 60 from the gas outlet of the salt-making and storage unit 10.

[0053] S23: Stop vacuuming and then use pressure supply unit 50 to input argon gas.

[0054] S24: Repeat steps S21-S23 multiple times.

[0055] In this embodiment, after argon gas is introduced into the testing system, the testing system is then evacuated. This process is repeated to replace the air in the testing system with argon gas, effectively ensuring that the testing system is isolated from the air. This prevents air from interfering with the delivery of high-temperature liquid molten salt in the testing system, thereby affecting the circulation of high-temperature liquid molten salt within the testing system and enhancing the accuracy of the high-temperature molten salt pump performance test results.

[0056] In some embodiments, in step S24, steps S21-S23 can be repeated more than 3 times to ensure that the air in the test system is completely replaced by argon.

[0057] In some embodiments, step S30 further includes the following step:

[0058] S31: Activate the heat preservation device to heat and preserve the pipeline 60 in the test system.

[0059] S32: Add solid molten salt to the salt-making and storage unit 10, and heat the salt-making and storage unit 10, the container 20, the molten salt output unit 30, the molten salt input unit 40 and the pipeline 60 to a predetermined temperature to obtain liquid molten salt.

[0060] S33: Insulation time reservation.

[0061] In this embodiment, the pipeline is first heated and insulated to preheat the testing system to facilitate the transfer of molten salt. Then, the salt production and storage unit 10 is heated and kept warm for a predetermined time, thereby facilitating the conversion of the molten salt input into the salt production and storage unit 10 into a high-temperature liquid state.

[0062] In some embodiments, during step S32, when the salt-making and salt-storage unit 10 is heated, the temperature is raised to 450°C so as to convert the molten salt input to the salt-making and salt-storage unit 10 into high-temperature liquid molten salt that meets the requirements of the high-temperature molten salt pump performance test.

[0063] In some embodiments, during step S40, when the liquid molten salt is fed from the salt-making and storage unit 10 into the molten salt output unit 30, the pressure supply unit 50 continuously supplies slightly positive pressure argon gas to the salt-making and storage unit 10 to prevent the liquid molten salt from flowing back.

[0064] In some embodiments, step S40 further includes the following step:

[0065] S41: Heat the test system to the predetermined temperature.

[0066] S42: Start the high-temperature molten salt pump 100 and measure the bearing temperature, speed, vibration, flow rate, and head of the high-temperature molten salt pump 100.

[0067] In this embodiment, after the test system is heated to a predetermined temperature, the high-temperature molten salt pump 100 is started to make the molten salt circulate between the container 20, the molten salt output component 30 and the molten salt input component 40, simulating the long-term operating conditions of the high-temperature molten salt pump 100. During the molten salt circulation process, the bearing temperature, speed, vibration, flow rate and head of the high-temperature molten salt pump 100 are measured to obtain the performance parameter data of the high-temperature molten salt pump 100, thereby realizing the performance test of the high-temperature molten salt pump 100.

[0068] In some embodiments, in step S41, the test environment is heated to 550°C to simulate the actual operating environment of the high-temperature molten salt pump 100, meet the performance testing requirements, and help ensure that the test data accurately reflects the actual performance of the high-temperature molten salt pump 100.

[0069] In some embodiments, step S40 further includes the following steps:

[0070] S43: Change the rotational speed of the high-temperature molten salt pump 100 and measure the bearing temperature, rotational speed, vibration, flow rate, and head of the high-temperature molten salt pump 100. This is to test the performance of the high-temperature molten salt pump 100 at different rotational speeds, and to comprehensively test its operating status under different working conditions, thereby ensuring that the tested high-temperature molten salt pump 100 can meet the operating requirements under different working conditions.

[0071] For example, in step S53, the speed of the high-temperature molten salt pump 100 can be adjusted sequentially to 0.7nr, 0.8nr, 0.9nr and nr, where nr represents the rated speed. Under different speed conditions, the bearing temperature, speed, vibration and flow rate and head of the high-temperature molten salt pump 100 are measured respectively.

[0072] In some embodiments, the test method may further include: S50: discharging high-temperature liquid molten salt after the test in step S40 is completed.

[0073] In some embodiments, step S50 further includes:

[0074] S51: Turn off the high-temperature molten salt pump 100 and open the shutdown seal of the high-temperature molten salt pump 100.

[0075] S52: Close the outlets of the containment 20, the molten salt output 30, and the molten salt input 40.

[0076] S53: The pressure supply unit 50 pressurizes the air inlets of the container 20, the molten salt output unit 30 and the molten salt input unit 40 to force liquid molten salt into the salt production and storage unit 10.

[0077] In some embodiments, during step S50, when discharging the high-temperature liquid molten salt, argon gas is introduced into the container 20, the molten salt output component 30, and the molten salt input component 40 under a slight positive pressure, so that the internal pressure is slightly higher than that of the salt production and storage component 10, in order to prevent the liquid molten salt from flowing back and to facilitate the recovery of molten salt.

[0078] The following further describes the process of testing the high-temperature molten salt pump using the test method and test system of this application.

[0079] Adjust the pressure in the test system to 0.1 MPa; close the outlet valves of the salt production and storage component 10, the container 20, the molten salt output component 30, and the molten salt input component 40; open the shutdown seal of the high-temperature molten salt pump 100; detect the pressure changes in each branch formed by the interconnection between the salt production and storage component 10, the container 20, the molten salt output component 30, and the molten salt input component 40, and record the current pressure value of each branch when the pressure change is small and tends to be stable; wait for 3 hours, and then record the current pressure value of each branch again, and determine that the current pressure value is no different from the pressure value recorded 3 hours ago, or the pressure reaches 0.05 MPa. Argon gas is introduced into the salt-making and storage unit 10, the container 20, the molten salt output unit 30, the molten salt input unit 40, and the pipeline 60 using the pressure supply unit 50; the argon gas is introduced and then evacuated from the outlet of the salt-making and storage unit 10 into the salt-making and storage unit 10, the container 20, the molten salt output unit 30, the molten salt input unit 40, and the pipeline 60; the evacuation is stopped and argon gas is introduced again using the pressure supply unit 50; the evacuation process after introducing argon gas is repeated at least 3 times. Heating the salt-making and storage unit 10, the container 20, the molten salt output unit 30, the molten salt input unit 40, and the pipeline 60 to 50°C; evacuating the salt-making and storage unit 10, the container 20, the molten salt output unit 30, the molten salt input unit 40, and the pipeline 60 through the gas outlet of the salt-making and storage unit 10; stopping the evacuation, and using the pressure supply unit 50 to introduce argon gas into the salt-making and storage unit 10, the container 20, the molten salt output unit 30, the molten salt input unit 40, and the pipeline 60; stopping the argon gas introduction, and then evacuating the salt-making and storage unit 10, the container 20, the molten salt output unit 30, the molten salt input unit 40, and the pipeline 60 through the gas outlet of the salt-making and storage unit 10 again; repeating the evacuation and argon gas introduction steps more than 3 times. The heat preservation device is activated to heat the pipeline 60 in the test system to 450°C and maintain the temperature for 12 hours. Solid molten salt is added to the salt preparation and storage unit 10, and the salt preparation and storage unit 10, the container 20, the molten salt output unit 30, the molten salt input unit 40, and the pipeline 60 are heated to raise the test environment temperature to 450°C to obtain liquid molten salt. The temperature is maintained for 12 hours. The pressure supply unit 50 is used to allow the liquid molten salt to enter the container 20 and the molten salt output unit 30 from the salt preparation and storage unit 10. During this process, the pressure supply unit 50 continuously inputs slightly positive pressure argon gas into the salt preparation and storage unit 10.The test environment was heated to 550℃; the high-temperature molten salt pump 100 was started, and the bearing temperature, speed, vibration, flow rate, and head of the high-temperature molten salt pump 100 were measured; the speed of the high-temperature molten salt pump 100 was successively adjusted to 0.7nr, 0.8nr, 0.9nr, and nr, and the bearing temperature, speed, vibration, flow rate, and head of the high-temperature molten salt pump 100 were measured respectively; the high-temperature molten salt pump 100 was then turned off. Open the shutdown seal of the high-temperature molten salt pump 100; close the outlets of the container 20, molten salt output 30, and molten salt input 40; pressurize the inlets of the container 20, molten salt output 30, and molten salt input 40 using the pressure supply unit 50, and force the liquid molten salt into the salt production and storage unit 10. During this process, maintain a slight positive pressure to supply argon gas to the container 20, molten salt output 30, and molten salt input 40, so that their internal pressure is slightly higher than that of the salt production and storage unit 10.

[0080] Regarding the embodiments of this application, it should also be noted that, without conflict, the embodiments of this application and the features in the embodiments can be combined with each other to obtain new embodiments.

[0081] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. The scope of protection of this application shall be determined by the scope of the claims.

Claims

1. A testing system for testing high-temperature molten salt pumps, characterized in that, It comprises: a salt-making and storing part arranged for preparing the molten salt for testing and storing the prepared molten salt; a containing part in which the high-temperature molten salt pump is arranged, a molten salt output part arranged for receiving the molten salt from the salt-making and storing part and inputting the molten salt into the containing part, when the containing part is filled with the molten salt, the high-temperature molten salt pump starts to operate, a molten salt input part arranged for receiving the molten salt from the molten salt output part and arranged for returning the molten salt to the molten salt output part; a pressure providing part arranged for providing pressure to output the molten salt in the salt-making and storing part to the molten salt output part; a pipeline arranged for fluidly connecting the salt-making and storing part, the containing part, the molten salt output part and the molten salt input part.

2. The testing system according to claim 1, wherein the salt-making and storing part comprises a main body and a lining formed in the main body, the main body is arranged for preparing the molten salt and storing the prepared molten salt.

3. The testing system according to claim 1, wherein the salt-making and storing part comprises a main body and a leg part arranged for supporting the main body, the main body is arranged for preparing the molten salt and storing the prepared molten salt.

4. The testing system according to claim 2 or 3, wherein the main body comprises a first head part, a containing part and a second head part, the containing part is arranged between the first head part and the second head part, the first head part and the containing part and the containing part and the second head part are fixedly connected by welding, the lining is formed in the first head part, the containing part and the second head part, or the leg part is arranged for supporting the first head part or the second head part.

5. The testing system according to claim 4, wherein a connecting pipe is formed in the first head part or the second head part.

6. The testing system according to claim 1, wherein the pipeline connecting the salt-making and storing part and the molten salt output part forms a "Z" shape.

7. The testing system according to claim 1, wherein the pipeline connecting the salt-making and storing part and the molten salt input part forms a "Z" shape.

8. The testing system according to claim 1, wherein the pipeline connecting the molten salt output part and the molten salt input part forms a "Π" shape.

9. The testing system according to any one of claims 6-8, wherein at the corner of the pipeline, the pipeline is arranged to form a rounded corner.

10. A testing method for testing a high-temperature molten salt pump, wherein the testing method uses the testing system according to any one of claims 1-9 to test, which comprises the following steps: S10: transferring the molten salt into the salt-making and storing part; S20: vacuumizing the testing system, after the vacuumizing is completed, inputting argon; S30: heating the salt-making and storing part to form the molten salt into high-temperature liquid molten salt; S40: allowing the molten salt to pass from the salt making reservoir to the molten salt output, the molten salt being circulated between the containment, the molten salt output and the molten salt input by the high temperature molten salt pump, the high temperature molten salt pump being tested during the molten salt circulation. S40: allowing the molten salt to pass from the salt making reservoir to the molten salt output, the molten salt being circulated between the containment, the molten salt output and the molten salt input by the high temperature molten salt pump, the high temperature molten salt pump being tested during the molten salt circulation.

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