High-temperature molten-salt viscosity measurement device and high-temperature molten-salt viscosity measurement method

Abstract

The present application relates to a high-temperature molten-salt viscosity measurement device and measurement method. The high-temperature molten-salt viscosity measurement device comprises a container, a first electrode plate, a second electrode plate, a heating mechanism, and a rotating mechanism, wherein the container is configured to add molten salt; the first electrode plate and the second electrode plate are configured to connect to an external alternating current, and the first electrode plate and the second electrode plate can be disposed at different heights in the axial direction of the container; the heating mechanism abuts against an outer side wall surface of the container; the heating mechanism is configured to heat the container to a preset temperature; and the container is connected to the rotating mechanism, and the rotating mechanism can drive the container to rotate relative to the first electrode plate and the second electrode plate in the axial direction. When the device is in use, by means of the observation of the magnitude of the current conducted by the first electrode plate and the second electrode plate and the calculation of the rotational angular acceleration of the high-temperature molten salt, the viscosity of the high-temperature molten salt can be measured, thereby reducing the step of a related sensor coming into contact with the high-temperature molten salt for measurement, and thus avoiding the problem of the sensor being corroded and contaminated.

Description

High-temperature molten salt viscosity detection device and high-temperature molten salt viscosity detection method TECHNICAL FIELD

[0001] The present application relates to the technical field of viscosity detection, in particular to a high-temperature molten salt viscosity detection device and a high-temperature molten salt viscosity detection method. BACKGROUND

[0002] As a heat storage material in the process of power plant steam extraction and heat storage, the viscosity of molten salt at different temperatures has an important influence on the energy consumption and heat exchange efficiency of the system, so it is necessary to accurately determine the viscosity of molten salt at different temperatures.

[0003] In related technologies, the viscosity of molten salt is generally measured by a capillary tube viscometer, a rotary viscometer or a vibration viscometer. Among them, the capillary tube method needs to measure the viscosity according to the time of fluid flowing out of the container; the rotary viscometer is to place the rotor in the fluid, and measure the torque when the rotor rotates to measure the viscosity; the vibration viscometer also needs to place the sensor in the fluid, and measure the resistance when the sensor vibrates to calculate the viscosity.

[0004] However, the molten salt has large heat loss when flowing in the capillary tube, and is easy to cool and solidify, which makes the measurement result distorted. The rotary and vibration viscometers have the problem of sensor contamination due to the high working temperature of molten salt and the corrosion of molten salt to metal materials.

[0005] SUMMARY

[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 solve the problems of sensor contamination and difficult fluid temperature control when the detection device in related technologies measures the viscosity of high-temperature molten salt.

[0007] In one aspect, the present application provides a high-temperature molten salt viscosity detection device, which comprises:

[0008] a container for adding molten salt;

[0009] a first electrode plate and a second electrode plate for connecting external 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;

[0010] a heating mechanism abutting against the outer wall surface of the container, the heating mechanism being used for heating the container to a preset temperature;

[0011] A rotating mechanism, the container is connected with the rotating mechanism, and the rotating mechanism can drive the container to rotate relative to the first polar plate and the second polar plate around the axis direction.

[0012] The high-temperature molten salt viscosity detection device can detect the viscosity of the high-temperature molten salt by observing the current passing through the first polar plate and the second polar plate and calculating the angular acceleration of the high-temperature molten salt, thereby fully utilizing the electrical conductivity of the high-temperature molten salt, and the detection method is simple and reliable, and has high detection efficiency. In addition, the high-temperature molten salt is placed in the container, so that the temperature of the molten salt is relatively uniform, and the step of contacting the related sensor with the high-temperature molten salt for detection is reduced, thereby avoiding the corrosion and pollution of the sensor by the high-temperature molten salt. Further, the container is heated by the heating mechanism, so that the temperature of the high-temperature molten salt during detection can be maintained at a stable level, thereby helping to reduce heat loss and improve 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 comprises a heat preservation structure, which is arranged around the outer side wall of the container.

[0014] In one embodiment, 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 to cover and close the liquid injection port.

[0015] In one embodiment, 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 the temperature measuring structure is used to detect the temperature of the container.

[0016] In one embodiment, 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 polar plate, the second lifting arm is connected with the second polar plate, and the first lifting arm and the second lifting arm drive the first polar plate and the second polar plate to move along the axis direction of the container, respectively.

[0017] In one embodiment, 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 to drive the clamp to rotate, so that the clamp drives the container to rotate around the axis direction.

[0018] In one embodiment, the container is cylindrical and is made of high-temperature resistant and heat-conductive material.

[0019] In one of the embodiments, the heating mechanism is a heating wire, which is wound around the outer sidewall of the container along the axis of the container.

[0020] In another aspect, the application provides a high-temperature molten salt viscosity detection method, which is detected by the high-temperature molten salt viscosity detection device as described above, and comprises the following steps:

[0021] S1, adding a preset volume of molten salt into the container;

[0022] S2, adjusting the positions of the first electrode plate and the second electrode plate along the axis 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;

[0023] S3, starting the heating mechanism to heat the container to a preset temperature;

[0024] S4, connecting the first electrode plate and the second electrode plate, and recording the initial current value;

[0025] S5, starting the rotating mechanism to rotate at a preset angular velocity;

[0026] 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.

[0027] The high-temperature molten salt viscosity detection method needs to detect the viscosity of the high-temperature molten salt with unknown viscosity under the conditions of preset volume, preset temperature and preset angular velocity. Thus, after obtaining the time required from the initial current value to the stable current value, the rotational angular acceleration of the high-temperature molten salt from the static state to the stable rotation at the preset angular velocity can be further calculated. Correspondingly, according to the relationship that the viscosity of the fluid is inversely related to the rotational angular acceleration thereof in the container, the viscosity of the high-temperature molten salt can be obtained. The high-temperature molten salt viscosity detection method can realize the viscosity detection of the high-temperature molten salt by observing the current value of the circuit connected by the first electrode plate and the second electrode plate and calculating the rotational angular acceleration of the high-temperature molten salt. Thus, the conductivity of the high-temperature molten salt can be fully utilized, and the detection method is simple and reliable, and has high detection efficiency. Moreover, when the high-temperature molten salt viscosity detection method is applied, the high-temperature molten salt is placed in the container, so that the temperature of the molten salt is relatively uniform, and the step of detecting the high-temperature molten salt by the related sensor is reduced. Thus, the corrosion and pollution of the sensor by the high-temperature molten salt can be avoided. Further, the container is heated by the heating mechanism, so that the temperature of the high-temperature molten salt during the detection process can be maintained at a stable level, thereby helping to reduce heat loss and improve detection accuracy.

[0028] In one of the embodiments, after step S6, further comprising the step of adding a preset volume of a standard fluid into the container, the standard fluid having a known viscosity and a known density, and repeating steps S2-S6. BRIEF DESCRIPTION OF DRAWINGS

[0029] Fig. 1 is a structural front view of a high-temperature molten salt viscosity detection device according to an embodiment of the present application.

[0030] Fig. 2 is a partial structural top view of the high-temperature molten salt viscosity detection device shown in Fig. 1.

[0031] Fig. 3 is a structural schematic view of a high-temperature molten salt viscosity detection device according to another embodiment of the present application.

[0032] Fig. 4 is a structural schematic view of a high-temperature molten salt viscosity detection device according to still another embodiment of the present application.

[0033] Fig. 5 is a current output diagram of the high-temperature molten salt viscosity detection device according to an embodiment of the present application.

[0034] BRIEF DESCRIPTION OF DRAWINGS 10, molten salt; 100, container; 200, first electrode plate; 300, second electrode plate; 200a, alternating current wire; 400, heating mechanism; 500, rotating mechanism; 510, rotating motor; 520, clamp; 600, heat preservation structure; 700, upper cover; 800, temperature measurement structure; 900, first lifting arm; 1000, second lifting arm. DETAILED DESCRIPTION

[0035] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a variety of ways beyond the specific embodiments described herein, and it is understood that similar modifications of the present application can be made by those skilled in the art without departing from the scope of the present application, and therefore the present application is not limited to the specific embodiments disclosed below.

[0036] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0037] In addition, the terms "first", "second", and the like, if any, are used herein for descriptive purposes only and should not be construed as indicating or implying relative importance or implicating the number of indicated technical features. Thus, a feature defined with "first", "second" may include at least one of the features explicitly or implicitly. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0038] In the present application, unless otherwise explicitly specified and limited, if the terms "mounting", "connecting", "connecting", "fixing" and the like appear, these terms should be interpreted broadly. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In the present application, unless otherwise explicitly specified and limited, if the first feature is described as "on" or "under" the second feature and the like, it can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be the first feature directly above or obliquely above the second feature, or it can only mean that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature can be the first feature directly below or obliquely below the second feature, or it can only mean that the first feature is lower than the second feature in horizontal height.

[0040] It should be noted that if an element is referred to as "fixed to" or "disposed to" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for illustrative purposes and do not represent the only implementation.

[0041] Referring to FIG. 1, FIG. 1 shows a structure front view of a high-temperature molten salt viscosity detection device in an embodiment of the present application. The high-temperature molten salt viscosity detection device provided by an embodiment of the present application comprises a container 100, a first electrode plate 200, a second electrode plate 300, a heating mechanism 400, and a rotating mechanism 500. The container 100 is used to add molten salt 10. The first electrode plate 200 and the second electrode plate 300 can be connected to an alternating current through an alternating current wire 200a. The first electrode plate 200 and the second electrode plate 300 are symmetrically distributed around the axis of the container 100, and the first electrode plate 200 and the second electrode plate 300 can be arranged at different heights along the axis direction of the container 100. The heating mechanism 400 is in contact with the outer side 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 plate 200 and the second electrode plate 300 around the axis direction. As shown in FIG. 2, the first electrode plate 200 and the second electrode plate 300 are arranged opposite to each other around the outer side 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 side wall of the container 100.

[0042] Specifically, the viscosity of the fluid is inversely related to the angular acceleration of its rotation in the container 100, that is, the greater the viscosity of the fluid, the longer the time it takes to rotate from zero to a preset angular velocity, which reflects that the smaller the angular acceleration of rotation. Therefore, the inverse relationship can be used to test the angular acceleration of different fluids with unknown viscosity, and then the corresponding viscosity can be obtained. The above-mentioned "corresponding relationship between the viscosity of the fluid and the angular acceleration of its rotation in the container 100" can be obtained by calibration test on fluids with known viscosity, such as silicone oil, grease, etc., which will not be described here.

[0043] Further, the viscosity of the fluid is also affected by the change of the fluid density. Therefore, when the calibration test of the fluid with known viscosity is performed, 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 the present application, so that the density correction needs to be performed on the calculation process when the viscosity of the high-temperature molten salt 10 is finally calculated, in order to eliminate the calculation error caused by the density factor. Specifically, the density of the high-temperature molten salt 10 to be tested can be measured by using a density tester. The density measurement method is a conventional technical means in the art, which will not be described here.

[0044] In the present embodiment, the viscosity of the high-temperature molten salt 10 can also be calculated by using the above-mentioned "inverse relationship between the viscosity of the fluid and the angular acceleration of its rotation in the container 100". Further, in the present embodiment, the high-temperature molten salt 10 has electrical conductivity, so that the impedance of the inner side of the first electrode plate 200 and the second electrode plate 300 changes when the high-temperature molten salt 10 rotates in the container 100.

[0045] Specifically, in combination with FIG. 3, during rotation, the liquid level of the high-temperature molten salt 10 gradually rises and is approximately parabolic. When the liquid level of the high-temperature molten salt 10 rises, the impedance of the inner side of the first electrode plate 200 and the second electrode plate 300 decreases, thereby causing the current to increase. 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, so only the change in the current needs to be observed to obtain the time for the high-temperature molten salt 10 to accelerate from the initial state (static state) to the preset angular velocity, and then the rotational angular acceleration is calculated, and after density correction, the viscosity corresponding to the high-temperature molten salt 10 under the temperature condition can be calculated.

[0046] The high-temperature molten salt viscosity detection device can detect the viscosity of the high-temperature molten salt 10 by observing the current passing through the first electrode plate 200 and the second electrode plate 300 and calculating the rotational angular acceleration of the high-temperature molten salt 10, so that the electrical conductivity of the high-temperature molten salt 10 can be fully utilized, and the detection method is simple and reliable, and has high detection efficiency. In addition, the high-temperature molten salt 10 is placed in the container 100 during use, so that the temperature of the molten salt 10 is relatively uniform, and the step of contacting the high-temperature molten salt 10 for detection by the related sensor is reduced, so that the corrosion and pollution of the sensor by the high-temperature molten salt 10 can be avoided. Further, the container 100 is heated by the heating mechanism 400, so that the temperature of the high-temperature molten salt 10 during detection can be maintained at a stable level, 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 scheme of the present application can also be applied to any fluid with electrical conductivity, and is not limited to the high-temperature molten salt 10.

[0047] In combination with FIG. 1, in some embodiments, the high-temperature molten salt viscosity detection device further comprises a heat preservation structure 600, which is arranged around the outer wall of the container 100, so that the heat preservation performance of the high-temperature molten salt viscosity detection device can be improved, thereby reducing heat loss during detection and improving detection accuracy. Specifically, the heat preservation structure 600 is made of a low-thermal-conductivity material, such as thermal mortar material, rubber plastic thermal insulation material, or aerogel thermal insulation material, etc.

[0048] In combination with FIG. 1, in some embodiments, the high-temperature molten salt viscosity detection device further comprises an upper cover 700, and the container 100 has a liquid injection port, and the upper cover 700 is used to cover and close the liquid injection port, so that the container 100 forms a closed space, which can help to avoid the high-temperature molten salt 10 from being thrown out of the container 100 during rotation, causing pollution, and can improve the heat preservation performance of the container 100, reduce heat loss, and improve the detection accuracy of the high-temperature molten salt viscosity detection device.

[0049] In combination with FIG. 4, in some embodiments, the high-temperature molten salt viscosity detection device further comprises a temperature measurement structure 800 in contact with the outer wall of the container 100, which is used to detect the temperature of the container 100. In this way, the heating power of the heating mechanism 400 can be adjusted in real time according to the temperature change of the container 100, so that the temperature of the high-temperature molten salt 10 can be kept at a stable level during the detection process, thereby helping to improve the detection accuracy of the high-temperature molten salt viscosity detection device.

[0050] Further, in combination with FIG. 4, in some embodiments, the temperature measurement structure 800 can be provided as at least two, which are respectively connected to different positions of the container 100, and the average temperature of the plurality of temperature measurement structures 800 is taken as the result of temperature monitoring, so as to improve the temperature measurement effect of the temperature measurement structure 800, and further improve the detection accuracy of the high-temperature molten salt viscosity detection device. Further, in some embodiments, the temperature measurement structure 800 can be provided as three, of which two temperature measurement structures 800 are respectively symmetrically in contact with the side surface of the container 100, and one temperature measurement structure 800 is in contact with the bottom surface of the container 100, so as to make more comprehensive and accurate monitoring of the temperature change of the container 100.

[0051] In combination with FIG. 1, in some embodiments, the high-temperature molten salt viscosity detection device further comprises a first lifting arm 900 and a second lifting arm 1000. The first lifting arm 900 is connected with the first electrode plate 200. The second lifting arm 1000 is connected with 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, so as to adjust the relative height of the first electrode plate 200, the second electrode plate 300 and the liquid surface of the high-temperature molten salt 10 in the initial state.

[0052] Specifically, the high-temperature molten salt viscosity detection device is used to detect the current change time of the high-temperature molten salt 10 from the initial state to the stable rotating state, so that the positions of the first electrode plate 200 and the second electrode plate 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 plate 200 and the second electrode plate 300 are flush with the liquid level of the high-temperature molten salt 10. At this time, the impedance between the first electrode plate 200 and the second electrode plate 300 is maximum, that is, the current is minimum. In this way, the range of current change can be increased, and the detection accuracy can be improved. As shown in FIG. 5, the lower edges of the first electrode plate 200 and the second electrode plate 300 are flush with the liquid level of the high-temperature molten salt 10. In this way, the range of current change from the minimum value to the stable value can be increased, and the accuracy of the time t1 required for the current to change from the minimum value to the stable value can be improved, thereby improving the accuracy of the calculated rotating angular acceleration of the high-temperature molten salt 10.

[0053] Understandably, in other embodiments, the first electrode plate 200 and the second electrode plate 300 can also be adjusted in position by a slide rail or a screw drive, and the like, which will not be described here.

[0054] As shown in FIG. 1, in some embodiments, the rotating mechanism 500 includes a rotating motor 510 and a clamp 520. The clamp 520 is fixedly connected with the rotating motor 510, and the container 100 is clamped on the clamp 520, so that the structural stability of the container 100 can be improved. The rotating motor 510 is used to drive the clamp 520 to rotate, so that the clamp 520 drives the container 100 to rotate around the axis direction.

[0055] In some embodiments, the container 100 is cylindrical and is made of a high-temperature-resistant and heat-conductive material, so that the convenience of temperature adjustment and control of the container 100 is improved. Preferably, the container 100 is made of a ceramic material, so that the container 100 has excellent mechanical strength and impact resistance. In addition, since the high-temperature molten salt 10 has a certain corrosive property, the use of a ceramic material can improve the corrosion resistance of the container 100. Understandably, in other embodiments, the container 100 can also be made of other materials with high thermal conductivity, high corrosion resistance and high strength, which will not be described here.

[0056] In some embodiments, the heating mechanism 400 is a heating wire, which is wound around the axis of the container 100 and wrapped on the outer side wall surface of the container 100. Since the heating wire has the characteristics of fast heating and winding, it can adapt to the shape of the side wall of the container 100 and improve the heating efficiency of the container 100. Understandably, in some embodiments, the heating mechanism 400 can be a heating sheet, a heating block or a heating ring, etc.

[0057] The application also provides a high-temperature molten salt viscosity detection method using the above-mentioned high-temperature molten salt viscosity detection device for detection, comprising the following steps:

[0058] S1, adding a preset volume of molten salt 10 into the container 100;

[0059] S2, adjusting the positions 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 both flush with the liquid level of the molten salt 10;

[0060] S3, starting the heating mechanism 400 to heat the container 100 to a preset temperature;

[0061] S4, connecting the first electrode plate 200 and the second electrode plate 300, and recording the initial current value;

[0062] S5, starting the rotating mechanism 500 so that the rotating mechanism 500 rotates at a preset angular velocity;

[0063] S6, after the current value of the circuit connected by the first electrode plate 200 and the second electrode plate 300 stabilizes, recording the time required from the initial current value to the stable current value.

[0064] The above high-temperature molten salt viscosity detection method needs to detect the viscosity of the unknown viscosity high-temperature molten salt 10 under the conditions of a preset volume, a preset temperature, and a preset angular velocity. Thus, after obtaining the time required from the initial current value to the stable current value, the time required for the high-temperature molten salt 10 to rotate from a stationary state to a preset angular velocity is obtained. Thus, the rotational angular acceleration of the high-temperature molten salt 10 from a stationary state to a preset angular velocity for stable rotation can be further calculated. Correspondingly, according to the relationship that the viscosity of a fluid is inversely related to its rotational angular acceleration in the container 100, after density correction, the viscosity of the high-temperature molten salt 10 can be obtained.

[0065] Specifically, in combination with FIG. 5, in one embodiment, by outputting a graph of the current of the circuit conducted by the first electrode plate 200 and the second electrode plate 300 over time on a related device, the time t1 required for the circuit to change from the initial current value to the stable current value can be obtained. Thus, the rotational angular acceleration in the t1 period can be calculated under the condition of knowing the preset angular velocity and t1. Then, according to the relationship that the viscosity of a fluid is inversely related to its rotational angular acceleration in the container 100, such as a related relationship table or a relationship function, and finally after density correction, the viscosity of the high-temperature molten salt 10 can be obtained.

[0066] In addition, the viscosity detection method of the high-temperature molten salt can realize viscosity detection of the high-temperature molten salt 10 by observing the current size of the first electrode plate 200 and the second electrode plate 300 and calculating the angular acceleration of the high-temperature molten salt 10, so that the conductivity of the high-temperature molten salt 10 can be fully utilized, the detection method is simple and reliable, and the detection efficiency is high. Moreover, when the viscosity detection method of the high-temperature molten salt is applied, the high-temperature molten salt 10 is placed in the container 100, so that the temperature of the molten salt 10 is relatively uniform, and the step of contacting the related sensor with the high-temperature molten salt 10 for detection is reduced, so that the corrosion and pollution of the sensor by the high-temperature molten salt 10 can be avoided. Further, the container 100 is heated by the heating mechanism 400, so that the temperature of the high-temperature molten salt 10 during the detection process can be maintained at a stable level, thereby reducing heat loss and improving detection accuracy.

[0067] It should be noted that the correspondence between the viscosity of the fluid and the angular acceleration of the fluid in the container 100 can be obtained by calibration test on fluids with known viscosity, such as silicone oil, grease, etc.

[0068] Specifically, in some embodiments, after step S6, the method further comprises the steps of: adding a standard fluid with a preset volume into the container 100, the standard fluid having a known viscosity and a known density, and repeating steps S2-S6. 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, so as to adapt to the above steps of the present application. In addition, adaptively, the lower edges of the first electrode plate 200 and the second electrode plate 300 in step S2 are flush with the liquid level of the molten salt 10, which means that the lower edges of the first electrode plate 200 and the second electrode plate 300 are flush with the liquid level of the standard fluid. By implementing the above steps, the corresponding angular acceleration of the standard fluid corresponding to the known viscosity can be obtained under the same preset volume, preset temperature and preset angular velocity, and the viscosity of the high-temperature molten salt 10 at the corresponding angular acceleration can be inversely deduced from the correspondence between the angular acceleration of the standard fluid and the viscosity. It should be noted that when the viscosity of the high-temperature molten salt 10 at the corresponding angular acceleration is inversely deduced, the calculation process of the high-temperature molten salt 10 needs to be corrected for density, because there is a density difference between the high-temperature molten salt 10 and the standard fluid, so as to eliminate the calculation error caused by the density factor.

[0069] In this embodiment, this step is a standard fluid viscosity calibration process, which is used to fit a function curve of different rotation time to preset angular velocity corresponding to different viscosities under the same preset volume, preset temperature and preset angular velocity, as a viscosity calculation standard of the high-temperature molten salt 10. Understandably, if the viscosity of the known standard fluid under the known volume, the known temperature and the known angular velocity is known, this step can be omitted, and the viscosity of the high-temperature molten salt 10 can be directly determined according to the known information through density correction.

[0070] The technical features of the above embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, but it should be understood that any combination of the technical features is within the scope of the present disclosure as long as there is no contradiction.

[0071] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these are within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to 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.

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