High-temperature molten-salt viscosity measurement device and high-temperature molten-salt viscosity measurement method
By observing the electrode current and rotational angular acceleration, and combining this with a heating mechanism to maintain temperature stability, the problems of sensor contamination and temperature control in high-temperature molten salt viscosity measurement were solved, achieving efficient and reliable detection results.
Patent Information
- Application Number
- PCT/CN2024/112575
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-06-04
- Filing Date
- 2024-08-16
- Publication Date
- 2026-01-22
AI Technical Summary
Existing high-temperature molten salt viscosity measuring devices suffer from problems such as sensor contamination and difficulty in controlling fluid temperature, leading to inaccurate measurement results.
A high-temperature molten salt viscosity detection device is used. By observing the magnitude of the conduction current of the electrode plate and the rotational angular acceleration of the high-temperature molten salt, and combining the heating mechanism to keep the molten salt temperature stable, the viscosity is detected by utilizing the conductivity of the molten salt, thus avoiding direct contact between the sensor and the high-temperature molten salt.
It achieves efficient and reliable high-temperature molten salt viscosity detection, reduces sensor corrosion and contamination, and improves detection accuracy and efficiency.
Smart Images
Figure CN2024112575_22012026_PF_FP_ABST
Abstract
Description
High-Temperature Molten Salt Viscosity Testing Device and Method Technical Field
[0001] This application relates to the field of viscosity testing technology, and in particular to a high-temperature molten salt viscosity testing device and a high-temperature molten salt viscosity testing method. Background Technology
[0002] Molten salt, as a heat storage material in the steam extraction and heat storage process of power plants, has a significant impact on the system's energy consumption and heat exchange efficiency due to its viscosity at different temperatures. Therefore, it is essential to accurately measure its viscosity at different temperatures.
[0003] In related technologies, the viscosity of molten salts is generally measured using capillary viscometers, rotational viscometers, or vibrational viscometers. The capillary method requires determining the viscosity based on the time it takes for the fluid to flow out of the container; the rotational viscometer places a rotor inside the fluid and measures the torque during rotation to determine the viscosity; and the vibrational viscometer also requires placing a sensor inside the fluid and measuring the resistance it experiences during vibration to calculate the viscosity.
[0004] However, molten salt experiences significant heat loss during flow within capillary tubes and is prone to cooling and solidification, leading to distorted measurement results. Rotary and vibratory viscometers, due to the high operating temperature of the molten salt and its corrosive nature to metallic materials, also suffer from sensor contamination issues.
[0005] Summary of the Invention
[0006] Therefore, it is necessary to provide a high-temperature molten salt viscosity detection device and a high-temperature molten salt viscosity detection method to address the problems of sensor contamination and fluid temperature control difficulties in the detection devices of related technologies when measuring high-temperature molten salt viscosity.
[0007] On one hand, this application provides a high-temperature molten salt viscosity testing device, the high-temperature molten salt viscosity testing device comprising:
[0008] Container, the container being used to add molten salt;
[0009] The first electrode plate and the second electrode plate are used to connect to external AC power. The first electrode plate and the second electrode plate are symmetrically distributed around the axis of the container, and the first electrode plate and the second electrode plate can be set at different heights along the axial direction of the container.
[0010] A heating mechanism is attached to the outer wall of the container and is used to heat the container to a preset temperature.
[0011] A rotating mechanism is provided, wherein the container is connected to the rotating mechanism, and the rotating mechanism is capable of driving the container to rotate relative to the first electrode plate and the second electrode plate around the axis.
[0012] The aforementioned high-temperature molten salt viscosity detection device, when in use, achieves viscosity detection by observing the magnitude of the current flowing through the first and second electrodes and calculating the rotational angular acceleration of the high-temperature molten salt. This fully utilizes the conductivity of the high-temperature molten salt, and the detection method is simple, reliable, and highly efficient. Furthermore, since the high-temperature molten salt is placed inside a container, the temperature of the molten salt is relatively uniform, and the number of steps involving sensor contact with the high-temperature molten salt is reduced, thus avoiding corrosion and contamination of the sensors. Moreover, the heating mechanism for the container ensures that the temperature of the high-temperature molten salt remains stable during the detection process, thereby reducing heat loss and improving the detection accuracy of the high-temperature molten salt viscosity detection device.
[0013] In one embodiment, the high-temperature molten salt viscosity detection device further includes a heat-insulating structure, which is arranged to surround the outer wall of the container.
[0014] In one embodiment, the high-temperature molten salt viscosity testing device further includes a top cover, and the container has a liquid injection port, the top cover being used to cover and seal the liquid injection port.
[0015] In one embodiment, the high-temperature molten salt viscosity detection device further includes a temperature measuring structure that abuts against the outer wall of the container and is used to detect the temperature of the container.
[0016] In one embodiment, the high-temperature molten salt viscosity testing device further includes a first lifting arm and a second lifting arm, the first lifting arm being connected to the first electrode plate and the second lifting arm being connected to the second electrode plate, the first lifting arm and the second lifting arm respectively driving the first electrode plate and the second electrode plate to move along the axial direction of the container.
[0017] In one embodiment, the rotating mechanism includes a rotating motor and a clamp, the clamp being fixedly connected to the rotating motor, and the container being clamped in the clamp. The rotating motor is used to drive the clamp to rotate, so that the clamp drives the container to rotate around the axis.
[0018] In one embodiment, the container is cylindrical and made of a high-temperature resistant, thermally conductive material.
[0019] In one embodiment, the heating mechanism is a heating wire that is wound around the outer wall of the container along its axis.
[0020] On the other hand, this application provides a method for detecting the viscosity of high-temperature molten salt using the high-temperature molten salt viscosity detection device described above, comprising the following steps:
[0021] S1. Add a predetermined volume of molten salt into the container;
[0022] S2. Adjust the position of the first electrode plate and the second electrode plate along the axial direction of the container so that the lower edges of the first electrode plate and the second electrode plate are flush with the liquid surface of the molten salt.
[0023] S3. Activate the heating mechanism to heat the container to the preset temperature;
[0024] S4. Connect the first electrode plate and the second electrode plate, and record the initial current value;
[0025] S5. Start the rotating mechanism so that the rotating mechanism rotates at a preset rotational angular velocity;
[0026] S6. After the current in the circuit connected by the first electrode and the second electrode stabilizes, record the time required for the current to change from the initial current value to the stable current value.
[0027] The aforementioned high-temperature molten salt viscosity detection method requires measuring the viscosity of a high-temperature molten salt with unknown viscosity under preset volume, temperature, and angular velocity conditions. After obtaining the time required for the initial current value to change to a stable current value, the rotational angular acceleration required for the high-temperature molten salt to stabilize at the preset angular velocity from a static state can be calculated. Correspondingly, based on the inverse correlation between the viscosity of a fluid and its rotational angular acceleration within a container, the viscosity of the high-temperature molten salt can be determined. This method achieves viscosity detection by observing the current flowing through the first and second electrodes and calculating the rotational angular acceleration of the high-temperature molten salt. This fully utilizes the conductivity of the high-temperature molten salt, and the detection method is simple, reliable, and highly efficient. Furthermore, since the high-temperature molten salt is placed inside a container, the temperature of the molten salt is relatively uniform, and the steps involving sensor contact with the high-temperature molten salt are reduced, thus avoiding corrosion and contamination problems to the sensors. Furthermore, by using a heating mechanism to heat the container, the temperature of the high-temperature molten salt can be maintained at a stable level during the detection process, thereby helping to reduce heat loss and improve detection accuracy.
[0028] In one embodiment, after step S6, the method further includes: adding a preset volume of standard fluid into the container, the standard fluid having a known viscosity and a known density, and repeating steps S2-S6. Attached Figure Description
[0029] Figure 1 is a front view of the high-temperature molten salt viscosity detection device in one embodiment of this application.
[0030] Figure 2 is a top view of part of the structure of the high-temperature molten salt viscosity testing device shown in Figure 1.
[0031] Figure 3 is a schematic diagram of the high-temperature molten salt viscosity detection device in another embodiment of this application.
[0032] Figure 4 is a schematic diagram of the high-temperature molten salt viscosity detection device in another embodiment of this application.
[0033] Figure 5 is a current output diagram of a high-temperature molten salt viscosity detection device in one embodiment of this application.
[0034] The reference numerals in the attached diagram are explained as follows: 10, molten salt; 100, container; 200, first electrode plate; 300, second electrode plate; 200a, AC power wire; 400, heating mechanism; 500, rotating mechanism; 510, rotating motor; 520, clamp; 600, heat preservation structure; 700, top cover; 800, temperature measuring structure; 900, first lifting arm; 1000, second lifting arm. Detailed Implementation
[0035] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0036] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0037] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0038] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0039] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0040] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.
[0041] Referring to Figure 1, Figure 1 shows a front view of the structure of a high-temperature molten salt viscosity testing device according to an embodiment of this application. The high-temperature molten salt viscosity testing device provided in an embodiment of this application includes a container 100, a first electrode 200, a second electrode 300, a heating mechanism 400, and a rotating mechanism 500. The container 100 is used to add molten salt 10. The first electrode 200 and the second electrode 300 can be connected to external AC power via AC wires 200a. The first electrode 200 and the second electrode 300 are symmetrically distributed around the axis of the container 100, and can be positioned at different heights along the axial direction of the container 100. The heating mechanism 400 abuts against the outer wall of the container 100. The heating mechanism 400 is used to heat the container 100 to a preset temperature. The container 100 is connected to the rotating mechanism 500, and the rotating mechanism 500 can drive the container 100 to rotate relative to the first electrode 200 and the second electrode 300 around its axial direction. As shown in Figure 2, the first electrode plate 200 and the second electrode plate 300 are arranged opposite each other around the outer wall of the container 100, and the first electrode plate 200 and the second electrode plate 300 are in a non-contact state with the outer wall of the container 100.
[0042] Specifically, since the viscosity of a fluid is inversely correlated with its angular acceleration within container 100—that is, the higher the fluid viscosity, the longer it takes to rotate from zero to reach a preset angular velocity, reflecting a smaller angular acceleration—this inverse correlation can be used to conduct angular acceleration tests on fluids of different or unknown viscosities, thereby determining the corresponding viscosity. The aforementioned "correlation between fluid viscosity and its angular acceleration within container 100" can be obtained through calibration tests on fluids of known viscosity, such as silicone oil and grease, and will not be elaborated further here.
[0043] Furthermore, the viscosity of a fluid is also affected by changes in fluid density. Therefore, during the calibration test of a fluid with known viscosity, the density of the fluid used in the calibration test is inconsistent with the density of the high-temperature molten salt 10 to be tested in this application. This necessitates a density correction in the final calculation of the viscosity of the high-temperature molten salt 10 to eliminate calculation errors caused by the density factor. Specifically, the density of the high-temperature molten salt 10 to be tested can be measured using a density meter. This density measurement method is a conventional technique in the field and will not be elaborated upon here.
[0044] In this embodiment, by utilizing the aforementioned "inverse correlation between the viscosity of a fluid and its rotational angular acceleration within the container 100," the viscosity of the high-temperature molten salt 10 can also be calculated by observing its rotation within the container 100. Furthermore, in this embodiment, since the high-temperature molten salt 10 is conductive, the impedance of the relatively inner sides of the first electrode 200 and the second electrode 300 will change when the high-temperature molten salt 10 rotates within the container 100.
[0045] Specifically, as shown in Figure 3, during rotation, the liquid level of the high-temperature molten salt 10 gradually rises, roughly in a parabolic shape. As the liquid level of the high-temperature molten salt 10 rises, the impedance on the relatively inner sides of the first electrode 200 and the second electrode 300 decreases, resulting in an increase in current. When the current reaches a steady state, it means that the angular velocity of the high-temperature molten salt 10 fluid is consistent with the angular velocity of the container 100. Therefore, by simply observing the change in current, the time it takes for the high-temperature molten salt 10 to accelerate from its initial state (stationary state) to the preset angular velocity can be obtained. This allows for the calculation of the rotational angular acceleration, and after density correction, the viscosity of the high-temperature molten salt 10 under that temperature condition can be calculated.
[0046] In use, the aforementioned high-temperature molten salt viscosity detection device can detect the viscosity of the high-temperature molten salt 10 by observing the magnitude of the current conducted through the first electrode 200 and the second electrode 300, and by calculating the rotational angular acceleration of the high-temperature molten salt 10. This fully utilizes the conductivity of the high-temperature molten salt 10, and the detection method is simple, reliable, and has high detection efficiency. Furthermore, since the high-temperature molten salt 10 is placed inside the container 100, the temperature of the molten salt 10 is relatively uniform, and the steps of contacting the sensor with the high-temperature molten salt 10 for detection are reduced, thus avoiding corrosion and contamination of the sensor by the high-temperature molten salt 10. Further, the heating mechanism 400 heats the container 100, ensuring that the temperature of the high-temperature molten salt 10 remains stable during the detection process, thereby reducing heat loss and improving the detection accuracy of the high-temperature molten salt viscosity detection device. It should be noted that the above-mentioned solution can also be applied to any conductive fluid, not limited to high-temperature molten salt 10.
[0047] Referring to Figure 1, in some embodiments, the high-temperature molten salt viscosity testing device further includes a heat insulation structure 600. This heat insulation structure surrounds the outer wall of the container 100, thereby improving the heat insulation performance of the high-temperature molten salt viscosity testing device, reducing heat loss during the testing process, and contributing to improved testing accuracy. Specifically, the heat insulation structure 600 is made of a low thermal conductivity material, such as insulating mortar, rubber-plastic insulating material, or aerogel insulating material.
[0048] Referring to Figure 1, in some embodiments, the high-temperature molten salt viscosity testing device further includes a top cover 700. The container 100 has a liquid injection port, and the top cover 700 is used to cover and seal the liquid injection port. This allows the container 100 to form a closed space, which helps to prevent the high-temperature molten salt 10 from being thrown out of the container 100 during rotation and causing contamination. On the other hand, it can improve the heat preservation of the container 100, reduce heat loss, and improve the detection accuracy of the high-temperature molten salt viscosity testing device.
[0049] Referring to Figure 4, in some embodiments, the high-temperature molten salt viscosity detection device further includes a temperature measuring structure 800. The temperature measuring structure 800 abuts against the outer wall of the container 100 and is used to detect the temperature of the container 100. This allows the heating power of the heating mechanism 400 to be adjusted in real time according to the temperature changes of the container 100, thus ensuring that the temperature of the high-temperature molten salt 10 remains at a stable level during the detection process, which helps to improve the detection accuracy of the high-temperature molten salt viscosity detection device.
[0050] Furthermore, referring to Figure 4, in some embodiments, at least two temperature sensing structures 800 can be configured, with each of the at least two temperature sensing structures 800 respectively contacting and connected to different positions of the container 100. The average temperature of the multiple temperature sensing structures 800 is used as the result of temperature monitoring, which can improve the temperature sensing effect of the temperature sensing structures 800 and thus improve the detection accuracy of the high-temperature molten salt viscosity detection device. Even further, in some embodiments, three temperature sensing structures 800 can be configured, with two temperature sensing structures 800 symmetrically contacting the sides of the container 100 and one temperature sensing structure 800 contacting the bottom surface of the container 100. This allows for more comprehensive and accurate monitoring of the temperature changes of the container 100.
[0051] Referring to Figure 1, in some embodiments, the high-temperature molten salt viscosity detection device further includes a first lifting arm 900 and a second lifting arm 1000. The first lifting arm 900 is connected to the first electrode plate 200. The second lifting arm 1000 is connected to the second electrode plate 300. The first lifting arm 900 and the second lifting arm 1000 respectively drive the first electrode plate 200 and the second electrode plate 300 to move along the axial direction of the container 100, thereby adjusting the relative height of the first electrode plate 200, the second electrode plate 300 and the surface of the high-temperature molten salt 10 in the initial state.
[0052] Specifically, the high-temperature molten salt viscosity detection device of this application is used to detect the time of current change of high-temperature molten salt 10 from an initial state to a stable rotational state. Therefore, the positions of the first electrode 200 and the second electrode 300 can be adjusted by the first lifting arm 900 and the second lifting arm 1000 respectively, so that the lower edges of the first electrode 200 and the second electrode 300 are flush with the liquid surface of the high-temperature molten salt 10. At this time, the impedance between the first electrode 200 and the second electrode 300 is the maximum, that is, the current is at its minimum. This helps to increase the range of current change and improve the detection accuracy. Referring to Figure 5, aligning the lower edges of the first electrode 200 and the second electrode 300 with the liquid surface of the high-temperature molten salt 10 helps to increase the range of current change from the minimum value to the stable value, thereby improving the accuracy of the time t1 required for the current to change from the minimum value to the stable value, and consequently improving the accuracy of calculating the rotational angular acceleration of the high-temperature molten salt 10.
[0053] Understandably, in some other embodiments, the first electrode plate 200 and the second electrode plate 300 can also be adjusted in position by means of slide rail or lead screw transmission, which will not be described in detail here.
[0054] Referring to Figure 1, in some embodiments, the rotating mechanism 500 includes a rotating motor 510 and a clamp 520. The clamp 520 is fixedly connected to the rotating motor 510, and the container 100 is clamped in the clamp 520, which improves the structural stability of the container 100. The rotating motor 510 drives the clamp 520 to rotate, causing the clamp 520 to rotate the container 100 around its axis.
[0055] In some embodiments, the container 100 is cylindrical and made of a high-temperature resistant, thermally conductive material, thus improving the ease of temperature adjustment and control of the container 100. Preferably, the container 100 is made of a ceramic material, which gives the container 100 excellent mechanical strength and impact resistance. Furthermore, since the high-temperature molten salt 10 is somewhat corrosive, using a ceramic material can improve the corrosion resistance of the container 100. Understandably, in other embodiments, the container 100 may also be made of other materials with high thermal conductivity, high corrosion resistance, and high strength, which will not be elaborated here.
[0056] In some embodiments, the heating mechanism 400 is a heating wire that is wound around the axis of the container 100 and around the outer wall of the container 100. Because the heating wire has the characteristics of rapid heating and being able to be wound, it can adapt to the shape of the side wall of the container 100, thus improving the heating efficiency of the container 100. Understandably, in some embodiments, the heating mechanism 400 can be a heating element, a heating block, or a heating ring, etc.
[0057] This application also provides a method for detecting the viscosity of high-temperature molten salt using the above-mentioned high-temperature molten salt viscosity detection device, comprising the following steps:
[0058] S1. Add a predetermined volume of molten salt 10 into container 100;
[0059] S2. Adjust the position of the first electrode plate 200 and the second electrode plate 300 along the axial direction of the container 100 so that the lower edges of the first electrode plate 200 and the second electrode plate 300 are flush with the liquid surface of the molten salt 10.
[0060] S3. Start the heating mechanism 400 to heat the container 100 to the preset temperature;
[0061] S4. Connect the first plate 200 and the second plate 300, and record the initial current value;
[0062] S5. Start the rotating mechanism 500 so that the rotating mechanism 500 rotates at a preset rotational angular velocity;
[0063] S6. After the current in the circuit connected by the first electrode plate 200 and the second electrode plate 300 stabilizes, record the time required for the current to change from the initial current value to the stable current value.
[0064] The above-mentioned high-temperature molten salt viscosity detection method requires viscosity detection of high-temperature molten salt 10 with unknown viscosity under preset volume, preset temperature and preset angular velocity conditions. In this way, after obtaining the time required for the initial current value to change to a stable current value, the time required for the high-temperature molten salt 10 to rotate from a stationary state to a preset angular velocity can be obtained. In this way, the rotational angular acceleration of the high-temperature molten salt 10 to rotate stably from a stationary state to a preset angular velocity can be further calculated. Correspondingly, according to the relationship that "the viscosity of a fluid is inversely correlated with its rotational angular acceleration in container 100", the viscosity of the high-temperature molten salt 10 can be obtained after density correction.
[0065] Specifically, as shown in Figure 5, in one embodiment, by outputting a graph showing the relationship between the current of the circuits conducted by the first electrode plate 200 and the second electrode plate 300 and the change over time on the relevant device, the time t1 required for the circuit to change from the initial current value to a stable current value can be obtained. Then, given the preset angular velocity and t1, the rotational angular acceleration during this time period t1 can be calculated. Based on the relationship that "the viscosity of the fluid is inversely correlated with its rotational angular acceleration in the container 100", such as a relevant relationship table or relationship function, and after density correction, the viscosity of the high-temperature molten salt 10 can be obtained.
[0066] Furthermore, the aforementioned high-temperature molten salt viscosity detection method can detect the viscosity of the high-temperature molten salt 10 by observing the magnitude of the current conducted by the first electrode 200 and the second electrode 300, and by calculating the rotational angular acceleration of the high-temperature molten salt 10. This fully utilizes the conductivity of the high-temperature molten salt 10, and the detection method is simple, reliable, and has high detection efficiency. Moreover, in application, since the high-temperature molten salt 10 is placed inside the container 100, the temperature of the molten salt 10 is relatively uniform, and the steps of contacting the sensor with the high-temperature molten salt 10 for detection are reduced, thus avoiding the problem of corrosion and contamination of the sensor by the high-temperature molten salt 10. Furthermore, the setting of heating the container 100 by the heating mechanism 400 ensures that the temperature of the high-temperature molten salt 10 is maintained at a stable level during the detection process, thereby helping to reduce heat loss and improve detection accuracy.
[0067] It should be noted that the relationship between the viscosity of the fluid and its rotational angular acceleration within container 100 can be obtained through calibration tests on fluids of known viscosity, such as silicone oil and grease.
[0068] Specifically, in some embodiments, after step S6, the method further includes adding a predetermined volume of standard fluid to container 100. The standard fluid has a known viscosity and a known density, and steps S2-S6 are repeated. Adaptively, when the standard fluid is an insulating fluid such as silicone oil or grease, an appropriate amount of electrolyte needs to be added to the insulating fluid to make the standard fluid conductive, thus adapting to the above steps of this application. In addition, adaptively, the lower edges of the first electrode 200 and the second electrode 300 in step S2 are flush with the liquid surface of the molten salt 10. In this step, it means that the lower edges of the first electrode 200 and the second electrode 300 are flush with the liquid surface of the standard fluid. By implementing the above steps, it is possible to know the corresponding rotational angular acceleration of the standard fluid at a known viscosity under the same predetermined volume, predetermined temperature, and predetermined angular velocity. Therefore, the viscosity of the high-temperature molten salt 10 at the corresponding rotational angular acceleration can be deduced from the correspondence between the rotational angular acceleration and viscosity of the standard fluid. It should be noted that when finally reversing the viscosity of high-temperature molten salt 10 at the corresponding rotational angular acceleration, since there is a density difference between high-temperature molten salt 10 and the standard fluid, it is necessary to perform density correction on the calculation process of high-temperature molten salt 10 to eliminate the calculation error caused by density factors.
[0069] In this embodiment, this step is a viscosity calibration process for a standard fluid. Under the same preset volume, preset temperature, and preset angular velocity conditions, it fits function curves corresponding to different viscosities based on the time required to rotate to the preset angular velocity, serving as the viscosity calculation standard for the high-temperature molten salt 10. Understandably, if the viscosity of the standard fluid is known under known volume, known temperature, and known angular velocity conditions, this step can be omitted, and the viscosity of the high-temperature molten salt 10 can be directly determined based on known information and density correction.
[0070] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0071] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. A high temperature molten salt viscosity detection device, characterized by, The high-temperature molten salt viscosity detection device comprises: a container for adding molten salt; a first electrode plate and a second electrode plate for external connection of alternating current, the first electrode plate and the second electrode plate are symmetrically distributed around the axis of the container, and the first electrode plate and the second electrode plate can be arranged at different heights along the axis direction of the container; a heating mechanism for heating the outer side wall of the container to a preset temperature; a rotating mechanism connected with the container, and the rotating mechanism can drive the container to rotate relative to the first electrode plate and the second electrode plate around the axis direction.
2. The high temperature molten salt viscosity detection apparatus of claim 1, wherein, The high-temperature molten salt viscosity detection device further comprises a heat preservation structure, which is arranged around the outer side wall of the container.
3. The high temperature molten salt viscosity detection apparatus of claim 2, wherein, The high-temperature molten salt viscosity detection device further comprises an upper cover, and the container has a liquid injection port, and the upper cover is used for covering and sealing the liquid injection port.
4. The high temperature molten salt viscosity detection apparatus according to any one of claims 1 to 3, characterized by, The high-temperature molten salt viscosity detection device further comprises a temperature measuring structure, which is in contact with the outer side wall of the container, and is used for detecting the temperature of the container.
5. The high temperature molten salt viscosity detection apparatus of claim 1, wherein, The high-temperature molten salt viscosity detection device further comprises a first lifting arm and a second lifting arm, the first lifting arm is connected with the first electrode plate, the second lifting arm is connected with the second electrode plate, and the first lifting arm and the second lifting arm drive the first electrode plate and the second electrode plate to move along the axis direction of the container respectively.
6. The high temperature molten salt viscosity detection apparatus of claim 1, wherein, The rotating mechanism comprises a rotating motor and a clamp, the clamp is fixedly connected with the rotating motor, and the container is clamped in the clamp, and the rotating motor is used for driving the clamp to rotate, so that the clamp drives the container to rotate around the axis direction.
7. The high temperature molten salt viscosity detection apparatus of claim 1, wherein, The container is cylindrical and made of high-temperature resistant and heat conductive material.
8. The high temperature molten salt viscosity detection apparatus of claim 1, wherein, The heating mechanism is a heating wire which is wound around the axis of the container and the outer side wall of the container.
9. A method for detecting the viscosity of a high-temperature molten salt by using the high-temperature molten salt viscosity detection device according to any one of claims 1 to 8, characterized by, The method comprises the following steps: S1, adding a preset volume of molten salt into the container; S2, adjusting the positions of the first electrode plate and the second electrode plate along the axis direction of the container, so that the lower edges of the first electrode plate and the second electrode plate are flush with the liquid level of the molten salt; S3, starting the heating mechanism to heat the container to a preset temperature; S4, connecting the first electrode plate and the second electrode plate, and recording the initial current value; S5, starting the rotating mechanism to rotate at a preset rotating angular velocity; S6, after the current value of the circuit connected by the first electrode plate and the second electrode plate is stable, recording the time required from the initial current value to the stable current value.
10. The high temperature molten salt viscosity detection method of claim 9, wherein, After step S6, the following steps are further included: adding a preset volume of standard fluid into the container, the standard fluid has a known viscosity and a known density; repeating steps S2-S6.