CN117434116A - Interface dirt continuous measurement system and measurement method - Google Patents
Interface dirt continuous measurement system and measurement method Download PDFInfo
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- CN117434116A CN117434116A CN202311638971.4A CN202311638971A CN117434116A CN 117434116 A CN117434116 A CN 117434116A CN 202311638971 A CN202311638971 A CN 202311638971A CN 117434116 A CN117434116 A CN 117434116A
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- 238000005259 measurement Methods 0.000 title claims abstract description 60
- 238000000691 measurement method Methods 0.000 title claims abstract description 16
- 238000004458 analytical method Methods 0.000 claims abstract description 20
- 239000002689 soil Substances 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 18
- 238000001514 detection method Methods 0.000 claims description 15
- 238000011109 contamination Methods 0.000 claims description 13
- 238000007654 immersion Methods 0.000 claims description 3
- 238000003889 chemical engineering Methods 0.000 abstract description 2
- 239000012071 phase Substances 0.000 description 20
- 239000012074 organic phase Substances 0.000 description 17
- 239000008346 aqueous phase Substances 0.000 description 12
- 230000009286 beneficial effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 239000000356 contaminant Substances 0.000 description 4
- 239000003758 nuclear fuel Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000002285 radioactive effect Effects 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/06—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/06—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
- G01N27/07—Construction of measuring vessels; Electrodes therefor
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Abstract
The invention relates to the technical field of nuclear chemical engineering measurement and discloses an interface dirt continuous measurement system and a measurement method, wherein the interface dirt continuous measurement system comprises two sensors and an analysis unit, the two sensors are arranged in the vertical direction, the lengths of the two sensors are unequal, the tops of the two sensors are flush, the sensors comprise a plurality of electrodes and a plurality of shielding sections which are arranged in series at intervals, the electrodes are electrically connected with the shielding sections, and the tail ends of the sensors are electrodes.
Description
Technical Field
The invention relates to the technical field of nuclear chemical engineering measurement, in particular to a continuous measurement system and a continuous measurement method for interface dirt.
Background
In the nuclear fuel post-treatment process, interface dirt is generated between two-phase media (aqueous phase and organic phase) in the equipment due to the degradation of the organic solvent by the radioactive rays. The dirt is a mixture formed by an organic phase and an aqueous phase, and has high viscosity, and the density is between two phases of media, so that three phases coexist in the equipment, namely, the aqueous phase media, the interfacial dirt and the organic phase media are sequentially arranged from the bottom of the equipment to the top. For normal operation of production, the existence of interface dirt is harmful, and the interface dirt needs to be found out in time, positioned in time, discharged in time or dissolved and eliminated by means. Therefore, the problems of the position and thickness measurement of the interface dirt are solved, and the method is urgent and necessary.
In the prior art, the air blowing measurement technology is generally adopted to perform fixed-point measurement on the interface dirt, but the measurement method has certain limitation, can only perform measurement on the interface dirt with certain thickness and at certain height, and cannot realize continuous measurement on the interface dirt.
Disclosure of Invention
In view of the above, the invention provides a continuous measurement system and a continuous measurement method for interface dirt, which are used for solving the problems that the prior art is limited in measuring the interface dirt by a blowing method and cannot realize continuous measurement.
In a first aspect, the invention provides a continuous interface dirt measurement system for detecting a dirt position in a medium, which comprises two sensors and an analysis unit, wherein the two sensors are arranged in a vertical direction, the lengths of the two sensors are unequal, the tops of the two sensors are flush, the sensors comprise a plurality of electrodes and a plurality of shielding sections which are arranged in series at intervals, the electrodes are electrically connected with the shielding sections, the tail ends of the sensors are electrodes, the electrodes are suitable for detecting an admittance value of the medium, the shielding sections are suitable for separating the electrodes, and the analysis unit is electrically connected with the sensors and is suitable for analyzing and processing the admittance value detected by the electrodes.
The beneficial effects are that: when the electrode is in a single medium, the output admittance value is a constant, and when the electrode is in a two-phase medium, the output admittance value is between the admittance values of the electrode in the two single media, and according to the linear relation between the admittance value and the immersed height of the electrode in any phase, the position of the electrode is combined, so that the position of the upper surface or the lower surface of the dirt medium can be calculated, and the sustainable measurement can be realized and the measurement accuracy is high by detecting the signal values of the electrodes on the two sensors.
In an alternative embodiment, the number of electrodes and shield segments is equal.
The beneficial effects are that: the electrodes and the shielding sections are arranged in equal quantity so that the electrodes and the shielding sections are arranged at intervals, and the specific quantity of the electrodes and the shielding sections required to be arranged is calculated according to the height of the equipment to be tested.
In an alternative embodiment, the top end of the sensor is a shielding section.
The beneficial effects are that: the top end of the sensor is arranged as the shielding section, and the electrode and the shielding section are adjacently arranged, so that the bottom position of the sensor is the electrode, the interface positioned at the bottom position of the sensor can be measured, and the measuring range is improved.
In an alternative embodiment, the electrode and shielding sections are of equal length and the shielding sections at the top are of unequal length.
The beneficial effects are that: the electrodes and the shielding sections are set to be equal in length, so that the electrodes have the same measuring range, and because the positions of the tail end electrodes are different, the lengths of the shielding sections at the top ends are different, so that the total lengths of the two sensors are different, the positions of adjacent phase media can be judged by comparing the admittance values measured by the corresponding electrodes, and the device has the advantages of simple structure and high measuring accuracy.
In an alternative embodiment, one of the sensors is located on top of the tip electrode and the other sensor is located on the bottom of the tip electrode.
The beneficial effects are that: the top of one sensor terminal electrode is flush with the bottom of the other sensor terminal electrode, so that the electrode on one sensor corresponds to the position of the shielding section between two adjacent electrodes of the other sensor, and the positions measured by the electrodes on the two sensors are mutually continuous during measurement, thereby ensuring that no dead angle exists during measurement and improving the accuracy of measurement results.
In an alternative embodiment, the interface contamination continuous measurement system further comprises a connector adapted to be connected to the device to be measured, and the two sensor tip shielding sections are connected to the connector.
The beneficial effects are that: through setting up the connecting piece, when measuring, can make the sensor installation more firm to measurement result's accuracy has been improved.
In an alternative embodiment, the device further comprises a device to be measured, wherein the device to be measured is internally provided with a containing cavity for a medium, the top of the device to be measured is provided with a detection port, the connecting piece is arranged on the detection port, the sensor is placed in the containing cavity, and the tail end electrode is spaced from the inner bottom wall of the device to be measured.
In an alternative embodiment, the pitch is less than the length of the electrodes and the pitch is an integer multiple of 5 or 10.
The beneficial effects are that: the distance between the terminal electrode and the inner bottom wall of the equipment to be measured is set to be smaller than the length of the electrode, so that interface dirt can be effectively measured when the interface dirt is positioned at the very low position of the bottom of the equipment to be measured, and the distance is set to be an integer multiple of 5 or 10, so that the sensor is convenient to install and the number of the electrodes and the shielding sections is convenient to calculate.
In a second aspect, the present invention further provides a continuous measurement method for interfacial soil, where the continuous measurement system for interfacial soil is adopted, and the measurement method includes:
measuring the height from a detection port of the equipment to be measured to the inner bottom wall;
determining the lengths of the electrodes and the shielding sections in the two sensors according to the process requirements;
determining the distance between the bottom of the bottom electrode of the sensor and the inner bottom wall of the equipment to be measured by means of the length of the electrode;
the connecting piece is arranged at a detection port of the equipment to be measured, and the sensor extends into a medium in the accommodating cavity;
electrically connecting the sensor with the analysis unit;
measuring admittance values of the electrodes;
inputting the admittance value of each electrode into an analysis unit for comparison;
the analysis unit calculates the immersion condition of each electrode by each medium according to the admittance value.
In an alternative embodiment, between the steps of determining the lengths of the electrodes and the shielding sections of the two sensors according to the process requirements and determining the distance between the bottom of the bottom electrode of the sensor and the inner bottom wall of the device to be measured by means of the electrode lengths, the method further comprises:
calculating the number of required electrodes and shielding sections;
electrodes required for the two sensors are electrically connected in series with the shield segments.
The interface dirt continuous measurement method adopts the interface dirt continuous measurement system in the embodiment, so that the method has the same beneficial effects as the interface dirt continuous measurement system and is not repeated here.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a sensor in an interface dirt continuous measurement system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram showing lengths of an upper electrode and a shielding section of a sensor in an interface contamination continuous measurement system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an interface dirt continuous measurement system according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a continuous measurement system for interfacial soil according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of the location of an interface contaminant in a further continuous measurement system of the interface contaminant according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of the location of an interface contaminant in a further continuous measurement system of the interface contaminant according to an embodiment of the present invention.
Reference numerals illustrate:
1. a sensor; 11. a first sensor; 12. a second sensor; 101. an electrode; 102. a shielding section; 103. a connecting piece;
2. an analysis unit;
3. a device to be measured; 301. an organic phase; 302. interface contamination; 303. an aqueous phase; 304. a detection port;
4. a split cable;
5. partition walls.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiments of the present invention are described below with reference to fig. 1 to 6.
According to an embodiment of the present invention, as shown in fig. 1 and 2, in one aspect, there is provided an interface contamination continuous measurement system, including two sensors 1 and an analysis unit 2, the two sensors 1 are disposed along a vertical direction, the two sensors 1 are different in length, and top ends of the two sensors 1 are flush, the sensors 1 include a plurality of electrodes 101 and a plurality of shielding sections 102 disposed in series at intervals, the electrodes 101 are electrically connected with the shielding sections 102, the electrodes 101 are at ends of the sensors 1, the electrodes 101 are adapted to detect an admittance value of a medium, the shielding sections 102 are adapted to separate the electrodes 101, and the analysis unit 2 is electrically connected with the sensors 1 and is adapted to process the admittance value detected by the electrodes 101.
In this embodiment, as shown in fig. 1, the sensor 1 has a top end at the upper side and a bottom end at the lower side in the vertical direction.
Specifically, in the present embodiment, the object to be detected is a tank with interface dirt 302 in the two-phase medium (water phase 303, organic phase 301) generated by degradation of the organic solvent by the radioactive rays in the nuclear fuel post-treatment process. The soil is a highly viscous mixture of the organic phase 301 and the aqueous phase 303, and the density of the mixture is between two phase media, so that the storage tank forms a three-phase coexistence condition, namely the aqueous phase 303 media, the interfacial soil 302 and the organic phase 301 media are sequentially arranged from the bottom of the storage tank upwards.
The dielectric constants of the aqueous phase 303 medium, the organic phase 301 medium and the interfacial soil 302 are different, and the interfacial soil 302 has the characteristic of being very viscous.
In this embodiment, to measure the position and thickness of the interface dirt 302, the positions of the upper and lower surfaces of the interface dirt 302 should be measured. The admittance value of the output of a fixed length electrode 101 is constant when the whole electrode is in a single medium.
During measurement, each electrode 101 outputs a measured admittance value thereof, the admittance value is firstly compared with the admittance value of the electrode 101 in a single medium, the position of the interface dirt 302 is roughly determined, namely, which electrode 101 is between the organic phase 301 and the interface dirt 302, which electrode 101 is between the interface dirt 302 and the water phase 303, which electrode 101 is completely immersed by the interface dirt 302, then the immersing height of the electrode 101 between the organic phase 301 and the interface dirt 302 by the interface dirt 302 is calculated, the immersing height of the electrode 101 between the interface dirt 302 and the water phase 303 by the interface dirt 302 is finally determined by combining the known immersing heights of the electrodes 101, and then the upper surface position and the lower surface position of the interface dirt 302 can be respectively determined, so that the thickness of the interface dirt 302 to be measured is obtained, thereby achieving the measurement purpose.
According to the embodiment, when the electrode 101 is wholly in a single medium, the output admittance value is a constant, when the electrode 101 is in a two-phase medium, the output admittance value is between the admittance values of the electrode 101 in the two single media, and according to the linear relation between the admittance value and the immersed height of the electrode 101 by any phase, the position of the upper surface or the lower surface of a dirt medium can be calculated by combining the height position of the electrode 101, and the sustainable measurement can be realized by detecting the signal values of the electrodes 101 on the two sensors 1, and the measurement accuracy is high.
In one embodiment, as shown in FIG. 2, the number of electrodes 101 and shield segments 102 are equal.
Specifically, in the present embodiment, the number of shielding sections 102 and the number of electrodes 101 in the two sensors 1 are the same, and the numbers are set to N and N1, that is, n=n1, more specifically, the two sensors 1 are the first sensor 11 and the second sensor 12, for example, the electrodes 101 in the first sensor 11 are sequentially set to a, b, c, d, e, f, g from bottom to top, the shielding sections 102 are sequentially set between the adjacent electrodes 101 from bottom to top, the electrodes 101 in the second sensor 12 are sequentially set to a1, b1, c1, d1, e1, f1, g1, and the like from bottom to top, and the shielding sections 102 are sequentially set between the adjacent electrodes 101 from bottom to top.
The specific number of electrodes 101 and shielding segments 102 required to be set is calculated from the device height to be measured by setting the electrodes 101 and shielding segments 102 in equal numbers such that the electrodes 101 and shielding segments 102 are spaced apart.
In one embodiment, the top end of the sensor 1 is a shielding section 102.
Specifically, in this embodiment, the sensor 1 is sequentially connected to the electrode 101 from top to bottom by the shielding section 102, where the top end is the shielding section 102, and the bottom end is the electrode 101.
The top end of the sensor 1 is provided with the shielding section 102, and the electrode 101 and the shielding section 102 are adjacently arranged, so that the bottom position of the sensor 1 is the electrode 101, the interface at the bottom position of the sensor 1 can be measured, and the measuring range is improved.
In one embodiment, the electrodes 101 and the shield segments 102 are equal in length and the shield segments 102 at the top are unequal in length.
Specifically, in the present embodiment, the lengths of the electrode 101 and the shielding section 102 in the two sensors 1 are equal, the lengths are L and D respectively, the lengths of the shielding sections 102 at the top ends of the sensors 1 are different, and the top shielding sections 102 on the first sensor 11 and the second sensor 12 are P and P1 respectively, and the lengths are D1 and D2 respectively.
The electrodes 101 and the shielding sections 102 are set to be equal in length, so that the electrodes 101 have the same measuring range, and the shielding sections 102 at the top ends are different in length because the positions of the terminal electrodes 101 are different, so that the total lengths of the two sensors 1 are different, and the positions of adjacent phase media can be judged by comparing the admittance values measured by the corresponding electrodes 101.
In one embodiment, one of the sensors 1 is located on top of the tip electrode 101 and the other sensor 1 is located on the bottom of the tip electrode 101.
Specifically, in this embodiment, the upper end of the electrode a and the lower end of the electrode a1, the lower end of the electrode b and the upper end of the electrode a1, the upper end of the electrode b and the lower end of the electrode b1, the lower end of the electrode c and the upper end of the electrode b1, the upper end of the electrode c and the lower end of the electrode c1, the lower end of the electrode d and the upper end of the electrode c1, the upper end of the electrode d and the lower end of the electrode d1, the upper end of the electrode e and the lower end of the electrode e1, the lower end of the electrode f and the upper end of the electrode f1, the lower end of the electrode g and the upper end … … (and so on) of the electrode f1 are respectively flush, and the electrode 101 at the top is respectively connected to the top shielding section P and the top shielding section P1.
The top of the end electrode 101 of one sensor 1 is flush with the bottom of the end electrode 101 of the other sensor 1, so that the electrode 101 on one sensor 1 corresponds to the position of the shielding section 102 between the two adjacent electrodes 101 of the other sensor 1, and the positions measured by the electrodes 101 on the two sensors 1 are continuous during measurement, thereby ensuring that no dead angle exists during measurement and improving the accuracy of measurement results.
In one embodiment, the interface contamination continuous measurement system further comprises a connection 103 adapted to be connected to the device 3 to be measured, and the two sensors 1 top shield segments 102 are connected to the connection 103.
Specifically, in this embodiment, the connecting member 103 is a flange, and the top end shielding section P1 of the sensor 1 are connected to the bottom of the connecting member 103.
By providing the connection 103, the sensor 1 can be more firmly mounted during measurement, thereby improving the accuracy of the measurement result.
In one embodiment, as shown in fig. 3, the device to be measured 3 is further included, a containing cavity with a medium is arranged inside the device to be measured 3, a detection port 304 is arranged at the top of the device to be measured 3, a connecting piece 103 is installed on the detection port 304, the sensor 1 is placed in the containing cavity, and a space is reserved between the tail end electrode 101 and the inner bottom wall of the device to be measured 3.
Specifically, in this embodiment, the environment where the device to be measured 3 is located is a working place in the nuclear fuel post-treatment process, and the environment has radioactive rays. In this embodiment, the device 3 to be measured is a storage tank, and a large amount of two-phase medium (aqueous phase 303, organic phase 301) with interface dirt 302 exists in the storage tank.
More specifically, in this embodiment, the height of the tank to be measured is set to be H, the height of the detection port 304 is set to be H1, the connector 103 is mounted on the detection port 304, the thickness of the interface dirt 302 which is required to be least measurable is set to be G, and the distance H2 between the lower end of the electrode a in the sensor 1 and the bottom wall in the tank is set.
In the present embodiment, the device to be measured 3 is located in a high-emission region, and the analysis unit 2 is disposed in a low-emission region, such as the analysis unit 2 is disposed in the low-emission region on the other side of the high-emission region partition wall 5. The sensor 1 is connected to the analysis unit 2 by means of a separate cable 4, but in other embodiments not shown, the sensor 1 can also be connected to the analysis unit 2 by means of a wireless signal.
In this embodiment, the following relationships exist among the parameters L, D, D1, D2, N, N1, and H2:
L=D=G（1）
H2＜D（2）
N=N1=INT((H-H2-L)/(L+D))（3）
D1=H+H1-H2-N1×L-(N-1)×D（4）
D2=D1-L（5）
wherein H2 satisfies the formula (2) and simultaneously takes an integer multiple of 5 or 10; INT () in equation (3) is a downward rounding function.
In this embodiment, according to the basic principle of radio frequency admittance, when the whole electrode 101 with a fixed length L is in a certain single medium, the admittance value output by the electrode 101 is a constant, the admittance value when the whole electrode 101 is in air is set to be S1, the admittance value when the whole electrode 101 is in the organic phase 301 is set to be S2, the admittance value when the whole electrode 101 is in the interface dirt 302 is set to be S3, and the admittance value when the whole electrode 101 is in the water phase 303 is set to be S4; the admittance value S of the electrode 101 with fixed length L is output when the whole electrode is in a certain two-phase medium X (X is the number of the electrode 101) and the height Z at which the electrode 101 is immersed in either phase X (X is the code of the electrode 101) has a linear relationship as shown in formula (6):
S X =S0 X +K X ×Z X （6）
wherein S0 X And K X Is a constant related to the dielectric constant of the two-phase medium in which the electrode 101 is immersed, the length of the electrode 101, and the structure of the container.
In one embodiment, when the formula (2) is satisfied, the distance between the tip electrode 101 and the inner bottom wall of the device 3 to be measured is an integer multiple of 5 or 10.
Specifically, in the sensor 1 of the present embodiment, the distance H2 between the lower end of the electrode a and the bottom wall in the tank is less than D and is an integer multiple of 5 or 10, for example, d=10mm, and H2 is selected to be 5mm or the like.
The distance between the terminal electrode 101 and the inner bottom wall of the device to be measured 3 is set to be smaller than the length of the electrode 101, so that the interface dirt 302 can be effectively measured when the bottom of the device to be measured is at an extremely low position, and is set to be an integer multiple of 5 or 10, and the installation of the sensor 1 and the calculation of the number of the electrode 101 and the shielding section 102 are facilitated.
According to an embodiment of the present invention, on the other hand, as shown in fig. 4 to 6, there is also provided a continuous measurement method of interfacial soil, which adopts the continuous measurement system of interfacial soil in the present embodiment, the measurement method includes:
measuring the height from the detection opening 304 of the device 3 to be measured to the inner bottom wall;
determining the lengths of the electrodes 101 and the shielding sections 102 in the two sensors 1 according to the process requirements;
determining the distance between the bottom of the bottom electrode 101 of the sensor 1 and the bottom wall of the device 3 to be measured by means of the length of the electrode 101;
the connecting piece 103 is arranged at a detection port 304 of the equipment 3 to be measured, and the sensor 1 extends into a medium in the accommodating cavity;
electrically connecting the sensor 1 with the analysis unit 2;
measuring admittance values of the respective electrodes 101;
inputting the admittance values of the respective electrodes 101 to the analysis unit 2 for comparison;
the analysis unit 2 calculates the immersion of each electrode 101 by each medium based on the admittance value.
In one embodiment, between the steps of determining the length of the electrode 101 and the shielding section 102 of the two sensors 1 according to the process requirements and determining the distance between the bottom end electrode 101 of the sensor 1 and the bottom wall of the device 3 to be measured by means of the length of the electrode 101, further comprises:
calculating the number of required electrodes 101 and shielding segments 102;
the electrodes 101 required for the two sensors 1 are electrically connected in series with the shielding sections 102.
Specifically, specific steps of the interface contamination continuous measurement method in the present embodiment are exemplified below. For example, the height H of the storage tank is set to 1000mm, the height H1 of the instrument mounting pipe opening on the storage tank is set to 100mm, the thickness G of the interface dirt 302 with the lowest measurable process requirement is set to 10mm, and the parameters and the mounting positions of the sensor 1 in the embodiment can be determined according to the above formulas (1) to (5). That is, the length L of the electrode 101 is 10mm, the length D of the shielding section 102 is 10mm, the number N of the shielding sections 102 and the number N1 of the electrodes 101 are 49, the length D1 of the shielding section 102 at the top end is 125mm, D2 is 115mm, and the distance from the lower end of the electrode a to the bottom of the device is 5mm, namely H2 is 5mm, which is desirable for the installation position of the sensor 1.
As shown in FIG. 4, the admittance value measured by each electrode 101 is first obtained, and the admittance value when the electrode 101 is in air is based on the admittance value of the electrode l, that is, S l The admittance value of electrode k is the admittance value of electrode 101 in organic phase 301, i.e., S1 k Admittance value S of electrode k1 =s2 k1 Between S1 and S2, the liquid level is within the height range of the electrode k1, and the admittance value of the electrode 101 in the organic phase 301 is determined according to the admittance value of the electrode g, namely S g The admittance value of electrode f is the admittance value of electrode 101 in interface soil 302, i.e. S f An admittance value S of the electrode f1 =s3 f1 Between S2 and S3, it can be determined that the upper surface of the interface dirt 302 is in the height range of the electrode f1, and the electrode f is completely in the interface dirt 302, and the admittance value of the electrode 101 in the interface dirt 302 is the admittance value of S e1 The admittance value of electrode d1 is the admittance value of electrode 101 when in aqueous phase 303, i.e., S3 d1 Admittance value S of electrode e =s4 e Between S3 and S4, it can be determined that the lower surface of the interfacial soil 302 is within the height range of the electrode e, and the electrode e1 is completely within the interfacial soil 302.
Then S is carried out f1 、S e Substituting formula (6) to obtain the following formula:
S f1 =S0 f1 +K f1 ×Z f1 （7）
S e =S0 e +K e ×Z e （8）
wherein S is f1 、S e Admittance values measured for electrode f1, electrode e, respectively; s0 f1 、K f1 Is a constant related to the dielectric constant of the organic phase 301, the dielectric constant of the interfacial soil 302, the length of the electrode 101, the structure of the container; s0 e 、K e Is a constant related to the interfacial soil 302 dielectric constant, the aqueous phase 303 dielectric constant, the length of the electrode 101, the container structure; the height Z at which the electrode f1 is immersed by the interfacial soil 302 can be obtained by (7) f1 I.e., G1 in fig. 4; the height Z at which electrode e is immersed by interface soil 302 is obtained from (8) e I.e. G2 in fig. 4.
Finally, the known heights of the electrode f1 and the electrode e are combined to obtain the position W1 of the upper surface of the interface dirt 302 from the bottom of the storage tank, the position W2 of the lower surface of the interface dirt 302 from the bottom of the storage tank and the thickness W of the interface dirt 302.
The relationship between the upper surface of the interfacial soil 302 and the sump bottom position W1, the lower surface of the interfacial soil 302 and the sump bottom position W2, and the interfacial soil 302 thickness W is:
W1=H2+6×L+5×D+ G1（9）
W2=H2+5×L+4×D- G2（10）
W= W1- W2（11）
in the formulas (9) to (11), H2 is the distance between the lower end of the electrode a and the inner bottom wall of the equipment 3 to be measured, and in this example, is 5mm; l, D are the length of the electrode 101 and the length of the shielding section 102, respectively, which in this case is 10mm.
It should be noted that, when the thickness of the interface dirt 302 to be measured is exactly G, that is, 10mm in this example, the position condition shown in fig. 5 may occur, and the position and thickness measurement of the interface dirt 302 may still be achieved by using the continuous measurement system for interface dirt in this embodiment. The measurement process is simplified to an admittance value of the electrode 101 in the organic phase 301, i.e. S, based on the admittance value of the electrode e1 e1 The admittance value of electrode e is the admittance value of electrode 101 in interface soil 302, i.e. S e The admittance value of electrode d1 is the admittance value of electrode 101 when in aqueous phase 303, i.e., S3 d1 S4, interface soil 3 is availableThe positions of the upper surface and the lower surface of the electrode 02 are exactly the positions of the upper end and the lower end of the electrode e, and the thickness of the interface dirt 302 is exactly the length L of the electrode 101.
In addition, when the thickness of the interface dirt 302 is extremely thin and the thickness G of the interface dirt 302, which is 10mm in this example, is not required to be measured, as shown in fig. 6, the continuous measurement system for the interface dirt in this embodiment cannot accurately measure the position of the interface dirt 302, but can determine the height range of the interface dirt 302. The determination method is that the admittance value of the electrode 101 is in the organic phase 301 according to the admittance value of the electrode e1, namely S e1 The admittance value of electrode d1 is the admittance value of electrode 101 when in aqueous phase 303, i.e., S2 d1 The interfacial contamination 302 is located in the region where the electrode e is located and has a thickness lower than G, and the admittance Se of the electrode e is between S2 and S4.
In summary, by adopting the continuous measurement system for interface contamination in the present embodiment, the provided continuous measurement method for interface contamination can effectively realize continuous measurement of the position and thickness of the interface contamination 302 under various working conditions in the post-treatment process of nuclear fuel, and at the same time, can additionally obtain the liquid level height information of the tested device (S in the present embodiment) k1 Substituting into (6) and combining with the position where the electrode k1 is located, the measurement result can be used for more scientifically guiding running production, and the post-treatment measurement and control technology level is further improved.
Although embodiments of the present invention have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope of the invention as defined by the appended claims.
Claims (10)
1. An interface soil continuous measurement system for detecting a soil location in a medium, comprising:
the two sensors (1) are arranged in the vertical direction, the lengths of the two sensors (1) are unequal, the tops of the two sensors (1) are flush, the sensors (1) comprise a plurality of electrodes (101) and a plurality of shielding sections (102) which are arranged in series at intervals, the electrodes (101) are electrically connected with the shielding sections (102), the electrodes (101) are arranged at the tail ends of the sensors (1), the electrodes (101) are suitable for detecting the admittance value of a medium, and the shielding sections (102) are suitable for separating the electrodes;
an analysis unit (2) electrically connected to the sensor (1) and adapted to analyze the admittance values detected by the electrodes (101).
2. The interface contamination continuous measurement system according to claim 1, wherein the number of electrodes (101) and the shielding sections (102) are equal.
3. The interface contamination continuous measurement system according to claim 1 or 2, wherein the top end of the sensor (1) is the shielding section (102).
4. An interface contamination continuous measurement system according to claim 3, wherein the electrode (101) and the shielding section (102) are equal in length and the shielding section (102) at the top end is unequal in length.
5. The continuous measurement system of interfacial soil in accordance with claim 4 wherein one of said sensors (1) is positioned on top of the terminal electrode (101) and in the other of said sensors (1) is positioned flush with the bottom of the terminal electrode (101).
6. The interface soil continuous measurement system of claim 4 or 5, further comprising:
-a connection (103) adapted to be connected to a device (3) to be measured, the shielding sections (102) at the top ends of the two sensors (1) being connected to the connection (103).
7. The interface soil continuous measurement system of claim 6, further comprising:
wait measuring equipment (3), its inside is equipped with the holding chamber of medium, be equipped with detection mouth (304) at measuring equipment (3) top, connecting piece (103) are installed on detection mouth (304), sensor (1) are placed hold the intracavity, the end electrode (101) with leave the interval with the interior bottom wall of measuring equipment (3).
8. The continuous measurement system of interfacial soil of claim 7, wherein said pitch is less than a length of said electrode (101) and said pitch is an integer multiple of 5 or 10.
9. An interface soil continuous measurement method, characterized in that the interface soil continuous measurement system according to any one of claims 1 to 8 is employed, the measurement method comprising:
measuring the height from a detection port (304) of the equipment (3) to be measured to the inner bottom wall;
determining the lengths of the electrodes (101) and the shielding sections (102) in the two sensors (1) according to the process requirements;
determining the distance between the bottom of the bottom electrode (101) of the sensor (1) and the bottom wall of the device (3) to be measured by means of the length of the electrode (101);
the connecting piece (103) is arranged at a detection port (304) of the equipment (3) to be measured, and the sensor (1) extends into a medium in the accommodating cavity;
electrically connecting the sensor (1) to the analysis unit (2);
measuring admittance values of the electrodes (101);
inputting the admittance value of each electrode (101) into an analysis unit (2) for comparison;
the analysis unit (2) calculates the immersion of each electrode (101) by each medium based on the admittance values.
10. The continuous measurement method of interfacial soil according to claim 9, wherein between the step of determining the length of the electrode (101) and the shielding section (102) in the two sensors (1) according to the process requirements and the step of determining the distance between the bottom of the bottom electrode (101) of the sensor (1) and the inner bottom wall of the device (3) to be measured by means of the length of the electrode (101), further comprises:
calculating the number of required electrodes (101) and shielding sections (102);
electrodes (101) required for the two sensors (1) are electrically connected in series with the shielding sections (102).
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