CN105372172A - Generator internal cooling water hollow copper conductor on-line corrosion monitoring device - Google Patents
Generator internal cooling water hollow copper conductor on-line corrosion monitoring device Download PDFInfo
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- CN105372172A CN105372172A CN201510906020.XA CN201510906020A CN105372172A CN 105372172 A CN105372172 A CN 105372172A CN 201510906020 A CN201510906020 A CN 201510906020A CN 105372172 A CN105372172 A CN 105372172A
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Abstract
The invention discloses a generator internal cooling water hollow copper conductor on-line corrosion monitoring device, which comprises an electrochemical corrosion monitor, a data processing computer, a special tubular electrochemical corrosion on-line monitoring sensor and connecting wires. According to the generator internal cooling water hollow copper conductor on-line corrosion monitoring device, hollow copper conductors are directly adopted to manufacture the electrochemical corrosion on-line monitoring sensor. Thus, results are close to practical corrosion situations, anti-jamming capability is strong, measuring error is less, and generator internal cooling water hollow copper conductor corrosion rate can be monitored rapidly, accurately and continuously so as to guarantee safe operation of a generator. Sensor electrodes are integrated on a platform, the structure is simple, and field application is convenient. Then, the problem that multiple different and independent electrodes are hard to install in an internal cooling water system is solved, there is no need to measure and compensate solution resistance, and deviation of test results is small.
Description
Technical field
The invention belongs to Monitoring Corrosion equipment technical field, particularly relate to a kind of electric generator inner cooling water tubular copper conductor on-line corrosion monitoring device.
Background technology
The high-rating generators such as nuclear power plant, thermal power plant and hydroelectric power plant utilize water-cooling pattern to reduce the running temperature of line rod usually.In order to suppress or alleviate the corrosion of inner cold water to tubular copper conductor, have studied multiple corrosion protection method both at home and abroad, as corrosion inhibiter additive process and inner cold water Water-quality control method (little mixed bed method, alkali adding method, fill nitrogen method, deoxidizing etc.).Except using all kinds of corrosion protection method, because the operating condition of each unit differs, therefore, the corrosion rate that it may be necessary monitoring copper conductor adjusts corrosion protection technique and optimizes.Conventional corrosion monitoring process comprises copper content in mensuration inner cold water, adopts hanging slice method to make regular check on and galvanochemistry real time on-line monitoring method.Copper content measuring is owned by France in indirect method, directly can not react the corrosion condition of copper conductor; Hanging slice method test result is the most accurate, but lacing film test needs the time longer, can only carry out making regular check on and test; The feature that galvanochemistry real time on-line monitoring method has fast, accurate, original position is harmless, directly can measure corrosion rate, be desirable on-line monitoring method.
But, there is no electric generator inner cooling water corrosion electrochemistry on-line monitoring special purpose device at present.Use three traditional electrode sensors during universal electrochemical instrument test, comprise working electrode, auxiliary electrode and contrast electrode, three electrodes are generally independent, different.This sensor can not meet the requirement of inner cold water on-line corrosion monitoring.First, water-cooling generator requires that water conductivity is low, and the ion in contrast electrode (as saturated calomel electrode) or salt bridge enters can contaminated system.Secondly, in three traditional electrodes, each electrode is relatively independent, and measure system too complicated, onsite application is very difficult.Researcher is had to use two plane copper electrodes to carry out corrosion monitoring, but consistent with system flow rate in order to ensure copper electrode surface water flow velocity, electrode need be placed in ad hoc bypass, control complicated, need regulate by controlling bypass valve, and measure solution resistance and compensate, test result deviation is large.In addition, in system, inner cold water flowing also can have a certain impact to corrosion, and sensor should as far as possible close to tubular copper conductor corrosion actual conditions.
Summary of the invention
For solving the problem, the object of the present invention is to provide a kind of electric generator inner cooling water tubular copper conductor on-line corrosion monitoring device, with realize electric generator inner cooling water tubular copper conductor corrosion quick, accurately and continuously monitor, timely adjusting and optimizing corrosion protection technique, guarantees safe, stable, the economical operation of generator.
For reaching above object, the present invention takes following technical scheme: a kind of electric generator inner cooling water tubular copper conductor on-line corrosion monitoring device, comprises galvanic corrosion monitor (1), data handling machine (2), special tubulose galvanic corrosion on-line monitoring sensor (3) and is connected wire (4);
Described galvanic corrosion monitor is connected with described data handling machine by being connected wire with special tubulose galvanic corrosion on-line monitoring sensor;
Described special tubulose galvanic corrosion on-line monitoring sensor (3) is that same material is from reference three electrode sensor, comprise working electrode, contrast electrode, auxiliary electrode and sealed tube (6), three segment electrode outer walls are all welded with and connect wire (4) and coaxially evenly distributed, and described sealed tube carries out insulated enclosure to the pad on three segment electrodes and electrode;
Described three segment electrodes are three sections of measure-alike, the coaxially evenly distributed tubular copper conductor (5) intercepted from electric generator inner cooling water tubular copper conductor.
Further, described galvanic corrosion monitor (1) is the electro-chemical test instrument implementing potentiodynamic polarization scanning and linear polarization scanning.
Further, the width of described three segment electrodes is 5 ~ 15mm, and three interelectrode is spaced apart 4 ~ 6mm.
Further, described connection wire (4) is all less than 6ohm with the contact resistance of the welding joint of three segment electrodes.
Further, described insulated enclosure pipe (6) is epoxy resin, organic silicon rubber, phenolics or polytetrafluoroethylmaterial material make.
[pad of each surface of tubular copper conductor electrode (5) except inside surface and connection wire (4) can be sealed completely.】
Further, described insulated enclosure pipe (6) internal diameter is identical with tubular copper conductor (5) internal diameter, external diameter 3 ~ 5mm larger than tubular copper conductor electrode (5) external diameter, end section and adjacent tubular copper conductor electrode (5) distance are 4 ~ 6mm.Adopt the electric generator inner cooling water tubular copper conductor on-line corrosion monitoring device of technique scheme, three sections of electric generator inner cooling water tubular copper conductor of suitable dimension are first intercepted as electrode during use, be welded to connect wire and use sealed tube seal prepare tubular electrochemical on-line corrosion monitoring sensor after, be placed in the water inlet of electric generator inner cooling water system or main water outlet pipe, after connecting wire connecting sensor and galvanic corrosion monitor, carry out the real time on-line monitoring that the scanning of real-time potential polarization and linear polarization scanning can realize inner cold water tubular copper conductor corrosion rate.
Compared with prior art, tool has the following advantages in the present invention:
(1) electric generator inner cooling water tubular copper conductor on-line corrosion monitoring device of the present invention directly adopts tubular copper conductor to make galvanic corrosion on-line monitoring sensor, press close to corrode actual conditions, antijamming capability is strong, measuring error is little, electric generator inner cooling water tubular copper conductor corrosion rate can be monitored fast, accurately and continuously, ensure the safe operation of generator;
(2) working electrode, auxiliary electrode and contrast electrode are integrated on a platform and are formed from reference three electrode sensor by special tubulose galvanic corrosion on-line monitoring sensor of the present invention, structure is simple, rig-site utilization is convenient, solve the problem that independent, different multiple electrodes are difficult to be arranged in water-cooling generator, do not need to measure and compensate solution resistance, test result deviation is little;
(3) device of the present invention avoids and uses the parts containing foreign ion such as mercurous chloride electrode, salt bridge, has stopped foreign ion and has entered water-cooling generator, can not run have a negative impact to water-cooling generator;
(4) on-line monitoring size sensor of the present invention is identical with inner cold water tubular copper conductor, can directly be placed in electric generator inner cooling water system water inlet or main water outlet pipe the water velocity of electrode surface can be made identical with actual operating mode, regulate without the need to separately establishing bypass.
Accompanying drawing explanation
Fig. 1 is the structural representation of electric generator inner cooling water tubular copper conductor on-line corrosion monitoring device of the present invention;
Fig. 2 is the vertical view of special tubular electrochemical on-line corrosion monitoring sensor in Fig. 1;
Fig. 3 is the cut-open view of special tubular electrochemical on-line corrosion monitoring sensor in Fig. 1;
Fig. 4 is that the operation electric generator inner cooling water tubular copper conductor corrosion rate schematic diagram over time obtained tested by electric generator inner cooling water tubular copper conductor on-line corrosion monitoring device of the present invention, traditional two plane electrode test macros and corrosion coupon;
Label declaration: 1-galvanic corrosion monitor; 2-data handling machine; 3-special tubulose galvanic corrosion on-line monitoring sensor; 4-connects wire; 5-tubular copper conductor; 6-insulated enclosure pipe.
Embodiment
Below in conjunction with drawings and the specific embodiments, the invention will be further described.
See Fig. 1, electric generator inner cooling water tubular copper conductor on-line corrosion monitoring device provided by the invention is by galvanic corrosion monitor 1, data processing computing machine 2, special tubulose galvanic corrosion on-line monitoring sensor 3 be connected wire 4 and form, special tubulose galvanic corrosion on-line monitoring sensor 3 structure is see Fig. 2 and Fig. 3, be specially: three the measure-alike tubular copper conductor 5 directly intercepted from electric generator inner cooling water tubular copper conductor weld three respectively and connect wire 4, by coaxially evenly distributed for three tubular copper conductor, and by insulated enclosure pipe 6, tubular copper conductor electrode is become integrated tubular structure with pad sealing and curing.
Further, galvanic corrosion monitor 1 is the electro-chemical test instrument implementing potentiodynamic polarization scanning and linear polarization scanning.
Further, three tubular copper conductor 5 for directly to intercept from electric generator inner cooling water tubular copper conductor, measure-alike.
Preferably, the width of three tubular copper conductor 5 is 5 ~ 15mm, is spaced apart 4 ~ 6mm between three segment electrodes.
Further, every root connects wire 4 and is less than 6ohm with the contact resistance of the welding joint of tubular copper conductor electrode 5.
Further, insulated enclosure pipe 6 uses the materials such as epoxy resin, organic silicon rubber, phenolics or teflon, the pad of each surface of tubular copper conductor 5 except inside surface and connection wire 4 can be sealed completely.
Preferably, insulated enclosure pipe 6 internal diameter is identical with tubular copper conductor electrode 5 internal diameter, external diameter 3 ~ 5mm larger than tubular copper conductor 5 external diameter, and end section and adjacent tubular copper conductor 5 distance are 4 ~ 6mm.
Adopt the electric generator inner cooling water tubular copper conductor on-line corrosion monitoring device of technique scheme, first from intercepting three sections of electric generator inner cooling water tubular copper conductor of suitable dimension as electrode during use, be welded to connect wire and use sealed tube seal prepare tubular electrochemical on-line corrosion monitoring sensor after, be placed in the water inlet of electric generator inner cooling water system or main water outlet pipe, after connecting wire connecting sensor and galvanic corrosion monitor, carry out the real time on-line monitoring that the scanning of real-time potential polarization and linear polarization scanning can realize inner cold water tubular copper conductor corrosion rate.
Embodiment 1:
See Fig. 2, Fig. 3, intercept the inner cold water tubular copper conductor that three sections of width are 15mm, after welding copper connection wire respectively, according to interval 4mm arranged in co-axial alignment three electrodes.Use the poured with epoxy resin prepared to become internal diameter identical with tubular copper conductor electrode internal diameter, external diameter 5mm larger than tubular copper conductor electrode external diameter, two ends section is apart from the special tubulose galvanic corrosion on-line monitoring sensor of adjacent tubular copper conductor electrode 6mm.Shaping sensor is placed in water-cooling generator to intake female pipe, after connecting according to Fig. 1, carries out the scanning of real-time potential polarization and linear polarization scanning and namely achieve real time on-line monitoring to inner cold water tubular copper conductor corrosion rate.Fig. 4 is that electric generator inner cooling water tubular copper conductor on-line corrosion monitoring device of the present invention, traditional two plane electrode test macros and corrosion coupon test the operation electric generator inner cooling water tubular copper conductor corrosion rate that obtains over time.Contrast the data that three kinds of method tests obtain, can find that traditional two plane electrode test macros and all the other test result difference are comparatively large, corrosion rate is relatively bigger than normal, and data fluctuations is large, and result error is large; And the test result of electric generator inner cooling water tubular copper conductor on-line corrosion monitoring device of the present invention and corrosion coupon are tested, and to make regular check on result comparatively close, data fluctuations is little.Therefore, monitoring result of the present invention quick and precisely, presses close to corrode actual conditions, and antijamming capability is strong, and measuring error is little.
Embodiment 2
See Fig. 2, Fig. 3, intercept the inner cold water tubular copper conductor that three sections of width are 12mm, after welding copper connection wire respectively, according to interval 5mm arranged in co-axial alignment three electrodes.Use the fluid silicone rubber prepared to pour into internal diameter identical with tubular copper conductor electrode internal diameter, external diameter 4mm larger than tubular copper conductor electrode external diameter, two ends section is apart from the special tubulose galvanic corrosion on-line monitoring sensor of adjacent tubular copper conductor 5mm.Shaping sensor is placed in water-cooling generator main water outlet pipe, after connecting according to Fig. 1, carries out the scanning of real-time potential polarization and namely linear polarization scanning achieves real time on-line monitoring to inner cold water tubular copper conductor corrosion rate.Monitoring result quick and precisely, presses close to corrode actual conditions, and antijamming capability is strong, and measuring error is little.
Embodiment 3
See Fig. 2, Fig. 3, intercept the inner cold water tubular copper conductor that three sections of width are 8mm, after welding copper connection wire respectively, according to interval 6mm arranged in co-axial alignment three electrodes.Use phenolics to pour into internal diameter identical with tubular copper conductor electrode internal diameter, external diameter 3mm larger than tubular copper conductor electrode external diameter, two ends section is apart from the special tubulose galvanic corrosion on-line monitoring sensor of adjacent tubular copper conductor electrode 4mm.Shaping sensor is placed in water-cooling generator to intake female pipe, after connecting according to Fig. 1, carries out the scanning of real-time potential polarization and linear polarization scanning and namely achieve real time on-line monitoring to inner cold water tubular copper conductor corrosion rate.Monitoring result quick and precisely, presses close to corrode actual conditions, and antijamming capability is strong, and measuring error is little.
Embodiment 4
See Fig. 2, Fig. 3, intercept the inner cold water tubular copper conductor that three sections of width are 5mm, after welding copper connection wire respectively, according to interval 3mm arranged in co-axial alignment three electrodes.Use teflon to pour into internal diameter identical with tubular copper conductor electrode internal diameter, external diameter 4mm larger than tubular copper conductor electrode external diameter, two ends section is apart from the special tubulose galvanic corrosion on-line monitoring sensor of adjacent tubular copper conductor electrode 5mm.Shaping sensor is placed in water-cooling generator to intake female pipe, after connecting according to Fig. 1, carries out the scanning of real-time potential polarization and linear polarization scanning and namely achieve real time on-line monitoring to inner cold water tubular copper conductor corrosion rate.Monitoring result quick and precisely, presses close to corrode actual conditions, and antijamming capability is strong, and measuring error is little.
Claims (6)
1. an electric generator inner cooling water tubular copper conductor on-line corrosion monitoring device, is characterized in that: comprise galvanic corrosion monitor (1), data handling machine (2), special tubulose galvanic corrosion on-line monitoring sensor (3) and be connected wire (4);
Described galvanic corrosion monitor is connected with described data handling machine by being connected wire with special tubulose galvanic corrosion on-line monitoring sensor;
Described special tubulose galvanic corrosion on-line monitoring sensor (3) is that same material is from reference three electrode sensor, comprise working electrode, contrast electrode, auxiliary electrode and sealed tube (6), three segment electrode outer walls are all welded with and connect wire (4) and coaxially evenly distributed, and described sealed tube carries out insulated enclosure to the pad on three segment electrodes and electrode;
Described three segment electrodes are three sections of measure-alike, the coaxially evenly distributed tubular copper conductor (5) intercepted from electric generator inner cooling water tubular copper conductor.
2. the electric generator inner cooling water tubular copper conductor on-line corrosion monitoring device according to claims 1, is characterized in that, described galvanic corrosion monitor (1) is the electro-chemical test instrument implementing potentiodynamic polarization scanning and linear polarization scanning.
3. the electric generator inner cooling water tubular copper conductor on-line corrosion monitoring device according to claims 2, it is characterized in that, the width of described three segment electrodes is 5 ~ 15mm, and three interelectrode is spaced apart 4 ~ 6mm.
4. the electric generator inner cooling water tubular copper conductor on-line corrosion monitoring device according to claims 1 or 2, is characterized in that, described connection wire (4) is all less than 6ohm with the contact resistance of the welding joint of three segment electrodes.
5. the electric generator inner cooling water tubular copper conductor on-line corrosion monitoring device according to claims 1 or 2, is characterized in that, described insulated enclosure pipe (6) is epoxy resin, organic silicon rubber, phenolics or polytetrafluoroethylmaterial material are made.
6. the electric generator inner cooling water tubular copper conductor on-line corrosion monitoring device according to claims 1 or 2, it is characterized in that, described insulated enclosure pipe (6) internal diameter is identical with tubular copper conductor (5) internal diameter, external diameter 3 ~ 5mm larger than tubular copper conductor electrode (5) external diameter, end section and adjacent tubular copper conductor electrode (5) distance are 4 ~ 6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510906020.XA CN105372172A (en) | 2015-12-09 | 2015-12-09 | Generator internal cooling water hollow copper conductor on-line corrosion monitoring device |
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| CN201510906020.XA CN105372172A (en) | 2015-12-09 | 2015-12-09 | Generator internal cooling water hollow copper conductor on-line corrosion monitoring device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107449727A (en) * | 2017-07-28 | 2017-12-08 | 北京科技大学 | One kind utilizes the corrosive method of corrosion sensor continuous monitoring wild environment |
| CN107478567A (en) * | 2017-08-07 | 2017-12-15 | 武汉大学 | The experimental rig and method that simulation generator tubular copper conductor corrodes in inner cold water |
| CN108827869A (en) * | 2018-06-26 | 2018-11-16 | 九州职业技术学院 | The device and detection method of embed-type detection inside concrete corrosion conditions of reinforcement |
| CN112798644A (en) * | 2020-12-28 | 2021-05-14 | 武汉大学 | Film thermal resistance measuring system and method for evaluating corrosion degree and pickling and passivation effects of hollow copper conductor of generator |
| CN112858155A (en) * | 2021-01-21 | 2021-05-28 | 武汉大学 | Dynamic simulation test device and test method for corrosion of hollow copper conductor of generator |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107449727A (en) * | 2017-07-28 | 2017-12-08 | 北京科技大学 | One kind utilizes the corrosive method of corrosion sensor continuous monitoring wild environment |
| CN107478567A (en) * | 2017-08-07 | 2017-12-15 | 武汉大学 | The experimental rig and method that simulation generator tubular copper conductor corrodes in inner cold water |
| CN107478567B (en) * | 2017-08-07 | 2020-08-07 | 武汉大学 | Test device and method for simulating corrosion of hollow copper conductor of generator in internal cold water |
| CN108827869A (en) * | 2018-06-26 | 2018-11-16 | 九州职业技术学院 | The device and detection method of embed-type detection inside concrete corrosion conditions of reinforcement |
| CN112798644A (en) * | 2020-12-28 | 2021-05-14 | 武汉大学 | Film thermal resistance measuring system and method for evaluating corrosion degree and pickling and passivation effects of hollow copper conductor of generator |
| CN112858155A (en) * | 2021-01-21 | 2021-05-28 | 武汉大学 | Dynamic simulation test device and test method for corrosion of hollow copper conductor of generator |
| CN112858155B (en) * | 2021-01-21 | 2022-02-01 | 武汉大学 | Dynamic simulation test device and test method for corrosion of hollow copper conductor of generator |
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