CN113109396B - Columnar capacitor water content detection system and method - Google Patents
Columnar capacitor water content detection system and method Download PDFInfo
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- CN113109396B CN113109396B CN202110523541.2A CN202110523541A CN113109396B CN 113109396 B CN113109396 B CN 113109396B CN 202110523541 A CN202110523541 A CN 202110523541A CN 113109396 B CN113109396 B CN 113109396B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 238000001514 detection method Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000003990 capacitor Substances 0.000 title claims description 15
- 239000002184 metal Substances 0.000 claims abstract description 56
- 238000012545 processing Methods 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 238000004891 communication Methods 0.000 claims abstract description 12
- 238000005485 electric heating Methods 0.000 claims abstract description 5
- 239000011259 mixed solution Substances 0.000 claims description 13
- 239000010779 crude oil Substances 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 3
- 239000003921 oil Substances 0.000 claims description 3
- 235000019198 oils Nutrition 0.000 claims description 3
- 235000019476 oil-water mixture Nutrition 0.000 claims description 2
- 238000001556 precipitation Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000033558 biomineral tissue development Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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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
- G01N27/028—Circuits therefor
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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
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/221—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance by investigating the dielectric properties
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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
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/223—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance for determining moisture content, e.g. humidity
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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
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/226—Construction of measuring vessels; Electrodes therefor
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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
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/228—Circuits therefor
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention relates to a columnar capacitance water content detection system and method, comprising a metal pipeline, an insulating layer, a metal rod, an electric heating wire, a capacitance detection circuit, a micro-processing circuit, a display circuit, a communication circuit and a heating circuit, wherein a columnar electrode and a liquid flow baffle module are arranged in the metal pipeline, the output end of the columnar electrode is electrically connected with the input end of the capacitance detection circuit, the output end of the capacitance detection circuit is connected with the signal input end of the micro-processing circuit, the output end of the micro-processing circuit is respectively connected with the input ends of the communication circuit and the display circuit in a signal way, the columnar electrode passes through the metal pipeline, the capacitance value between the metal pipeline and the columnar electrode is detected by the capacitance detection circuit and is transmitted to the micro-processing circuit for processing.
Description
Technical Field
The invention belongs to the field of sensor detection, and particularly relates to a system and a method for detecting water content of a columnar capacitor.
Background
The detection of the water content of crude oil is an unresolved problem in the petroleum industry for many years, particularly the on-line water content detection of a wellhead, is influenced by mineralization, wax precipitation, gas and the like, has complex oil-water morphology, and a plurality of research institutions try methods such as a conductivity method, a capacitance method, radio frequency attenuation, microwave resonance and the like, so that the research and the development of various water content sensor detection systems cannot be well solved.
Therefore, it is desirable to provide a new columnar capacitance moisture content detection system to solve the above-mentioned problems.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provide a columnar capacitor water content detection system.
In order to achieve the technical purpose and the technical effect, the invention is realized by the following technical scheme:
The utility model provides a columnar capacitance moisture content detecting system, includes metal pipeline, insulating layer, metal bar, heating wire, electric capacity detection circuitry, micro-processing circuit, display circuit, communication circuit, heating circuit, the inside columnar electrode, the liquid flow baffle module that are provided with of metal pipeline, columnar electrode output and electric capacity detection circuitry input electric connection, electric capacity detection circuitry output and micro-processing circuit signal input are connected, micro-processing circuit output respectively with communication circuit, display circuit input signal connection, the columnar electrode passes the metal pipeline, and electric capacity value between electric capacity detection circuitry detection metal pipeline and the columnar electrode is carried to micro-processing circuit and is handled, obtains the mixed liquor moisture content through the metal pipeline.
Preferably, the columnar electrode is formed by wrapping an insulating layer outside a metal rod, the total length of the insulating layer is slightly smaller than that of the metal rod, and both ends of the insulating layer extend out of the metal pipeline.
Preferably, the columnar electrode and the metal pipeline are tightly sealed, and the sealing modes comprise glue filling, O-shaped rings and the like, so that the metal rod and the metal pipeline are ensured to be highly insulated.
Preferably, the micro-processing circuit realizes in-situ display of the water content by sending the water content of the mixed solution to the display circuit.
Preferably, the micro-processing circuit is used for realizing interaction between the water content and the upper computer by sending the water content of the mixed solution to the communication circuit.
Preferably, the metal pipeline is in the shape of various pipelines such as square pipes, round pipes and the like.
Preferably, the heating wire penetrates through the metal rod, and the heating circuit is used for controlling the heating wire to heat the columnar electrode, so that the columnar electrode is ensured not to be affected by wax precipitation.
Preferably, the liquid flow baffle module is arranged in the metal pipeline and at the downstream end of the columnar electrode, and the physical height of the columnar electrode is lower than that of the liquid flow baffle module, so that the columnar electrode is always in the mixed liquid.
The beneficial effects are that:
1. the columnar capacitance water content detection system can effectively avoid the influence of mineralization degree and wax precipitation on water content measurement.
2. Meanwhile, the gas influence well and the intermittent liquid outlet well can be well measured.
Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a circuit flow of the present invention;
FIG. 2A metal of the invention a pipeline structure schematic diagram;
FIG. 3A metal pipeline according to the present invention schematic inner and outer diameter;
the reference numerals in the drawings are as follows:
1-a metal pipe; 101-a columnar electrode; 102-a flow baffle module; 2-an insulating layer; 3-a metal rod; 4-heating wire; a 5-capacitance detection circuit; a 6-microprocessor circuit; 7-a display circuit; 8-a communication circuit; 9-a heating circuit.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. 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.
Example 1:
As shown in fig. 1-3, the invention relates to a columnar capacitance water content detection system, which comprises a metal pipeline 1, an insulating layer 2, a metal rod 3, an electric heating wire 4, a capacitance detection circuit 5, a micro-processing circuit 6, a display circuit 7, a communication circuit 8 and a heating circuit 9, wherein a columnar electrode 101 and a liquid flow baffle module 102 are arranged in the metal pipeline 1, the output end of the columnar electrode 101 is electrically connected with the input end of the capacitance detection circuit 5, the output end of the capacitance detection circuit 5 is connected with the signal input end of the micro-processing circuit 6, the output end of the micro-processing circuit 6 is respectively connected with the input ends of the communication circuit 8 and the display circuit 7 in a signal manner, the columnar electrode 101 penetrates through the metal pipeline 1, the capacitance value between the metal pipeline 1 and the columnar electrode 101 is detected by the capacitance detection circuit 5, and the capacitance value is transmitted to the micro-processing circuit 6 for processing, and the water content of a mixed liquid passing through the metal pipeline 1 is obtained.
The specific application of this embodiment is: at normal temperature, the dielectric constant of oil is 2.1, and the dielectric constant of water is 81, so crude oils with different water contents have different dielectric constants. Therefore, the columnar capacitance sensor can be designed, and the water content in the oil-water mixture can be detected by detecting the capacitance change of the columnar capacitance sensor.
Wherein, the metal pipeline 1 is used as a loop electrode of the columnar capacitor, the columnar electrode 101 is used as a measuring electrode of the columnar capacitor, and according to the basic knowledge of the columnar capacitor, the method is obtained through the following analysis and calculation steps:
c m is the capacitance obtained by actual measurement;
Epsilon ol is the dielectric constant of the mixed liquor;
Epsilon t is the dielectric constant of insulating layer 2;
d 1 is the outer diameter of the metal rod 3;
d 2 is the outer diameter of the insulating layer 2.
Step 2: according to the dielectric constant calculation principle of the mixed solution, the water content of crude oil can be obtained;
step 1: obtaining the dielectric constant of the mixed solution immersed by the columnar electrode 101;
Epsilon oil is the dielectric constant of crude oil and is 2.1 at normal temperature;
epsilon w is the dielectric constant of water and is 81 at normal temperature;
Y w is the water content of the mixed solution.
From this, it can be determined that:
example 2:
Wherein the columnar electrode 101 is formed by wrapping an insulating layer 2 outside a metal rod 3, the total length of the insulating layer 2 is slightly smaller than the total length of the metal rod 3, both ends of the insulating layer extend out of the metal pipeline 1, strict sealing is realized between the columnar electrode 101 and the metal pipeline 1, the sealing modes comprise glue filling, O-shaped rings and the like, the metal rod 3 and the metal pipeline 1 are ensured to be highly insulated,
Example 3;
the micro-processing circuit 6 realizes the in-situ display of the water content by sending the water content of the mixed solution to the display circuit 7, and the micro-processing circuit 6 realizes the interaction of the water content and an upper computer by sending the water content of the mixed solution to the communication circuit 8;
Example 4: the metal pipeline 1 is in the shape of various pipelines such as square pipes, round pipes and the like, the electric heating wire 4 passes through the metal rod 3, and the heating circuit 9 controls the electric heating wire 4 to heat the columnar electrode 101, so that the columnar electrode 101 is not influenced by wax deposition;
example 5:
the liquid flow baffle module 102 is arranged in the metal pipeline 1 and at the downstream end of the columnar electrode 101, and the physical height of the columnar electrode 101 is lower than that of the liquid flow baffle module 102, so that the columnar electrode 101 is ensured to be always in mixed liquid, and the influence of gas and intermittent liquid discharge on measurement is effectively solved.
In the description herein, reference to the terms "one embodiment," "example," "specific example," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (6)
1. The columnar capacitance water content detection method is realized based on a columnar capacitance water content detection system and is characterized in that: the columnar capacitance water content detection system comprises a metal pipeline (1), an insulating layer (2), a metal rod (3), an electric heating wire (4), a capacitance detection circuit (5), a micro-processing circuit (6), a display circuit (7), a communication circuit (8) and a heating circuit (9), wherein a columnar electrode (101) and a liquid flow baffle module (102) are arranged inside the metal pipeline (1), the output end of the columnar electrode (101) is electrically connected with the input end of the capacitance detection circuit (5), the output end of the capacitance detection circuit (5) is connected with the signal input end of the micro-processing circuit (6), the output end of the micro-processing circuit (6) is respectively connected with the input ends of the communication circuit (8) and the display circuit (7) in a signal mode, the columnar electrode (101) penetrates through the metal pipeline (1), the capacitance value between the metal pipeline (1) and the columnar electrode (101) is detected by the capacitance detection circuit (5), and the capacitance value is transmitted to the micro-processing circuit (6) to be processed, and the water content of a mixed liquid passing through the metal pipeline (1) is obtained;
The columnar electrode (101) is formed by wrapping an insulating layer (2) outside a metal rod (3), the total length of the insulating layer (2) is slightly smaller than that of the metal rod (3), and both ends of the insulating layer extend out of the metal pipeline (1);
The columnar electrode (101) and the metal pipeline (1) are tightly sealed in a glue filling and O-shaped ring mode;
the columnar capacitance moisture content detection method based on the columnar capacitance moisture content detection system comprises the following steps:
s1, at normal temperature, the dielectric constant of oil is 2.1, and the dielectric constant of water is 81, so crude oil with different water contents has different dielectric constants; therefore, the columnar capacitance sensor can be designed, and the water content in the oil-water mixture is detected by detecting the capacitance change of the columnar capacitance sensor;
s2, taking the metal pipeline (1) as a loop electrode of the columnar capacitor, taking the columnar electrode (101) as a measuring electrode of the columnar capacitor, and obtaining the electrode through the following analysis and calculation steps according to the basic knowledge of the columnar capacitor:
the capacitance obtained by actual measurement;
Is the dielectric constant of the mixed solution;
epsilon t is the dielectric constant of the insulating layer (2);
d 1 is the outer diameter of the metal rod (3);
d 2 is the outer diameter of the insulating layer (2);
According to the dielectric constant calculation principle of the mixed solution, the water content of crude oil can be obtained;
Obtaining the dielectric constant of the mixed solution immersed by the columnar electrode (101);
the dielectric constant of crude oil is 2.1 at normal temperature;
the dielectric constant of water is 81 at normal temperature;
the water content of the mixed solution is the water content;
From this, it can be determined that:
。
2. The method for detecting the water content of the columnar capacitor according to claim 1, wherein: the micro-processing circuit (6) transmits the water content of the mixed solution to the display circuit (7).
3. The method for detecting the water content of the columnar capacitor according to claim 1, wherein: the micro-processing circuit (6) sends the water content of the mixed solution to the communication circuit (8).
4. The method for detecting the water content of the columnar capacitor according to claim 1, wherein: the metal pipeline (1) is square or round in shape.
5. The method for detecting the water content of the columnar capacitor according to claim 1, wherein: the heating wire (4) passes through the metal rod (3), and the heating circuit (9) is used for controlling the heating wire (4) to heat the columnar electrode (101).
6. The method for detecting the water content of the columnar capacitor according to claim 1, wherein: the liquid flow baffle module (102) is arranged inside the metal pipeline (1) and at the downstream end of the columnar electrode (101), and the physical height of the columnar electrode (101) is lower than that of the liquid flow baffle module (102).
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101598695A (en) * | 2009-07-27 | 2009-12-09 | 浙江大学 | Method and system for measuring water content of crude oil using Doppler filtering |
| CN201876436U (en) * | 2010-11-23 | 2011-06-22 | 中国石油天然气股份有限公司 | Double-wire anti-scaling and anti-wax probe for online testing of water content of crude oil by capacitance method |
| CN104820000A (en) * | 2015-04-22 | 2015-08-05 | 杭州飞科电气有限公司 | Online measuring equipment for water content in crude oil |
| CN214703412U (en) * | 2021-05-13 | 2021-11-12 | 陕西永凯科技有限公司 | Columnar capacitor water content detection system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5033289A (en) * | 1988-05-16 | 1991-07-23 | Texaco Inc. | Water cut monitoring means and method |
| JP5670762B2 (en) * | 2011-01-12 | 2015-02-18 | 株式会社関口 | Water ratio measuring method and water ratio measuring apparatus for W / O type emulsion liquid |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101598695A (en) * | 2009-07-27 | 2009-12-09 | 浙江大学 | Method and system for measuring water content of crude oil using Doppler filtering |
| CN201876436U (en) * | 2010-11-23 | 2011-06-22 | 中国石油天然气股份有限公司 | Double-wire anti-scaling and anti-wax probe for online testing of water content of crude oil by capacitance method |
| CN104820000A (en) * | 2015-04-22 | 2015-08-05 | 杭州飞科电气有限公司 | Online measuring equipment for water content in crude oil |
| CN214703412U (en) * | 2021-05-13 | 2021-11-12 | 陕西永凯科技有限公司 | Columnar capacitor water content detection system |
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