CN112782256A - Multi-parameter probe for corrosion monitoring and corrosion detection system - Google Patents
Multi-parameter probe for corrosion monitoring and corrosion detection system Download PDFInfo
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Abstract
An embodiment of the present invention provides a multi-parameter probe for corrosion monitoring, the multi-parameter probe comprising: the electrochemical noise electrode unit comprises a working electrode group, a reference electrode group and an auxiliary electrode group, wherein the working electrode group, the reference electrode group and the auxiliary electrode group are used for outputting three groups of electric signals under the condition that a target area is corroded; wherein the working electrode set comprises 3 working electrodes, the reference electrode set comprises 3 reference electrodes, and the auxiliary electrode set comprises 3 auxiliary electrodes; the three working electrodes, the 3 reference electrodes and the 3 auxiliary electrodes are arranged in a set 3 x 3 matrix form, and the electrodes in the probe are arranged in a set 3 x 3 matrix form arrangement mode, so that the problem that the electrodes are short-circuited is avoided.
Description
Technical Field
The invention relates to the technical field of corrosion monitoring, in particular to a multi-parameter probe and a corrosion detection system for corrosion monitoring.
Background
The low-temperature corrosion problem of the oil refining device is very common and serious, particularly the dew point corrosion, ammonium salt corrosion and the like of an overhead system are most prominent, but the problems are not solved well all the time, and corrosion and perforation of the wall of an atmospheric overhead tower occur in some oil refineries.
The corrosion monitoring technology commonly used for the oil refining device at present comprises a weight loss hanging piece, a resistance probe, an inductance probe, FSM (electric field fingerprint), ultrasonic acoustic emission, hydrogen flux, LPR (traditional electrochemistry) and EN (electrochemical noise) and other technologies, and each technology has certain advantages or defects in the aspects of timeliness, sensitivity, applicable corrosion types (uniform corrosion or local corrosion), monitoring environment and the like. Wherein the short circuit appears among the electrodes that the monitoring probe appears in time, or carries out adjacent electrode through the insulating piece in order to avoid the problem of interelectrode short circuit, can confirm that, there is great problem in this detection probe's electrode distribution.
Disclosure of Invention
An object of an embodiment of the present invention is to provide a multi-parameter probe and a corrosion detection system for corrosion monitoring, wherein electrodes in the probe are arranged in a set 3 × 3 matrix arrangement manner in the multi-parameter probe, so as to avoid a problem that the electrodes will be short-circuited.
To achieve the above object, an embodiment of the present invention provides a multi-parameter probe for corrosion monitoring, including:
the electrochemical noise electrode unit comprises a working electrode group, a reference electrode group and an auxiliary electrode group, wherein the working electrode group, the reference electrode group and the auxiliary electrode group are used for outputting three groups of electric signals under the condition that a target area is corroded;
wherein the working electrode set comprises 3 working electrodes, the reference electrode set comprises 3 reference electrodes, and the auxiliary electrode set comprises 3 auxiliary electrodes;
the three working electrodes, the 3 reference electrodes and the 3 auxiliary electrodes are arranged in a set 3 x 3 matrix.
Optionally, the 3 working electrodes include a first working electrode (W1), a second working electrode (W2), and a third working electrode (W3);
the 3 reference electrodes include a first reference electrode (R1), a second reference electrode (R2), and a third reference electrode (R3);
the 3 auxiliary electrodes include a first auxiliary electrode (A1), a second auxiliary electrode (A2), and a third auxiliary electrode (A3);
the 3 × 3 matrix arrangement comprises the following arrangement modes:
optionally, the multi-parameter probe is arranged in the target area, wherein the target area is a dew point area at the tower top of the oil refining device and/or a water tank at an ammonium salt corrosion prone position.
Optionally, the multi-parameter probe further comprises at least one of:
a chloride ion detecting electrode;
a pH value detection electrode;
a separate reference electrode corresponding to said chloride ion detecting electrode and/or said PH detecting electrode; and
a temperature detection electrode;
wherein, when the target area is corroded, the electrodes respectively output electric signals.
An embodiment of the present invention provides a corrosion detection system, including:
the multiparameter probe of any one of claims 1-4;
the sensor is connected with the multi-parameter probe and used for respectively extracting a current signal and a voltage signal in a set electric signal according to the electric signal provided by the multi-parameter probe and calculating one or more of the following according to the extracted current signal and the extracted voltage signal:
corrosion rate and local corrosion tendency information, chloride ion concentration, PH or temperature value of the target area.
Optionally, the sensor comprises an ammeter and a voltmeter;
wherein, the respectively extracting the current signal and the voltage signal in the setting electric signal according to the electric signal provided by the multi-parameter probe comprises:
the ammeter respectively outputs current information between a working electrode group and an auxiliary electrode group in the multi-parameter probe and current information of output current of the temperature detection electrode according to electric signals provided by the working electrode group, the auxiliary electrode group and the temperature detection electrode; and
the voltmeter outputs voltage information between the working electrode group and the reference electrode group in the multi-parameter probe, voltage information between the chloride ion detection electrode and the independent reference electrode corresponding to the chloride ion detection electrode and/or the pH value detection electrode, and voltage information between the pH value detection electrode and the independent reference electrode corresponding to the chloride ion detection electrode and/or the pH value detection electrode, according to electric signals provided by the working electrode group and the reference electrode group in the multi-parameter probe, the chloride ion detection electrode, the pH value detection electrode and the independent reference electrode corresponding to the chloride ion detection electrode and/or the pH value detection electrode, respectively.
Optionally, the sensor further comprises:
a calculating unit, connected to the current meter and the voltage meter respectively, for performing the following operations:
calculating corrosion rate and local corrosion tendency information of the target area according to the current information between the working electrode group and the auxiliary electrode group and the voltage information between the working electrode group and the reference electrode group;
determining the chloride ion concentration of the target area according to the voltage information between the chloride ion detection electrode and the independent reference electrode corresponding to the chloride ion detection electrode and/or the PH value detection electrode and a pre-stored potential-chloride ion concentration calibration curve;
determining the pH value of the target area according to the voltage information between the pH value detection electrode and the independent reference electrode corresponding to the chloride ion detection electrode and/or the pH value detection electrode and a pre-stored potential-hydrogen ion concentration calibration curve;
and calculating the resistance value of the working electrode group according to the current information between the working electrode group and the auxiliary electrode group and the current information of the output current of the temperature detection electrode, and determining the temperature value of the target area according to the calculated resistance value and a prestored resistance-temperature curve.
Optionally, the system further includes:
and the data processing platform is connected with the sensor and is used for inputting the corrosion rate and local corrosion tendency information of the target area, the chloride ion concentration of the target area, the PH value of the target area and the temperature value of the target area, which are provided by the sensor, into a pre-stored corrosion prediction model and outputting a corresponding corrosion risk dynamic evaluation result through the corrosion prediction model.
According to the technical scheme, the multi-parameter probe is arranged in a target area to monitor whether the target area is corroded in real time, wherein the 3 working electrodes, the 3 reference electrodes and the 3 auxiliary electrodes in the multi-parameter probe are arranged in a set 3 x 3 matrix form, so that under the condition that the electrodes are short-circuited, an insulating sheet does not need to be clamped between the electrodes for insulating treatment, and the monitoring cost of the multi-parameter probe is saved; meanwhile, three groups of electrochemical noise signals are collected, and compared with the traditional single signal, the accuracy of monitoring and detecting data can be improved through statistical processing.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a multiparameter probe according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an electrode arrangement of an electrochemical noise electrode unit according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a multi-parameter probe according to a second embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a corrosion monitoring system according to a third embodiment of the present invention;
fig. 5 is a schematic diagram of data transmission according to a third embodiment of the present invention.
Description of the reference numerals
1 multiparameter probe 2 sensor
3 data processing platform W1 first working electrode
W2 second working electrode W3 third working electrode
R1 first reference electrode R2 second reference electrode
R3 third reference electrode A1 first auxiliary electrode
A2 second auxiliary electrode A3 third auxiliary electrode
10 electrochemical noise electrode unit 20 chloride ion detection electrode
30 independent reference electrodes corresponding to the chloride ion detecting electrode and/or the pH value detecting electrode
40 PH value detecting electrode 50 temperature detecting electrode
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.
Example one
Fig. 1 shows a schematic structural diagram of a multi-parameter probe according to an embodiment of the present invention, as shown in fig. 1, the multi-parameter probe 1 may include an electrochemical noise electrode unit 10, and the electrochemical noise electrode unit 10 may include three electrode groups, which are a working electrode group, a reference electrode group and an auxiliary electrode group, respectively, where the working electrode group includes 3 working electrodes, the reference electrode group includes 3 reference electrodes, and the auxiliary electrode group includes 3 auxiliary electrodes. When condensation and condensation occur on the probe, the three electrodes of each electrode group are covered by the liquid film and conducted, and then three groups of electric signals can be respectively output. Wherein, at multi-parameter probe 1 real-time supervision in-process, for avoiding short circuit between the electrode, will three working electrode 3 reference electrode and 3 auxiliary electrode arrange with the 3 x 3 matrix of setting for, arrange through the 3 x 3 matrix of this setting for and avoided short circuit between the electrode, under the circumstances of guaranteeing detection sensitivity, improved multi-parameter probe 1's detection stability.
Fig. 2 is a schematic diagram illustrating an electrode arrangement of the electrochemical noise electrode unit 10 according to a first embodiment of the present invention, and as shown in fig. 2, the 3 working electrodes include a first working electrode (W1), a second working electrode (W2), and a third working electrode (W3); the 3 reference electrodes include a first reference electrode (R1), a second reference electrode (R2), and a third reference electrode (R3); the 3 auxiliary electrodes include a first auxiliary electrode (A1), a second auxiliary electrode (A2), and a third auxiliary electrode (A3); the 3 × 3 matrix arrangement comprises the following arrangement modes:
preferably, each electrode diameter is phi 2mm, and the interval is about 2mm and arranges according to above-mentioned arrangement to encapsulate with high temperature resistant epoxy, and this kind of arrangement mode can effectual discontinuous distribution electrode, avoids the short circuit between the electrode, guarantees under the circumstances of detection sensitivity, improves detection stability. The electrochemical noise electrode unit 10 is composed of electrodes of the same material which are closely arranged, and the material is the same as or similar to the material of the measured part, so that the corrosion condition of tower top equipment or pipelines can be truly reflected.
A pipeline in an initial condensation area of water-containing oil gas at the top of the oil refining device is provided with a hole, and the multi-parameter probe 1 can be placed in a water tank in a dew point area at the top of the oil refining device and/or an ammonium salt corrosion prone position in a fixing mode of welding a short joint and a flange.
Example two
The multi-parameter probe 1 further comprises at least one of: a chloride ion detecting electrode 20, a pH value detecting electrode 40, a temperature detecting electrode 50, and a separate reference electrode 30 corresponding to the chloride ion detecting electrode and/or the pH value detecting electrode; wherein, when the target area is corroded, the electrodes respectively output electric signals.
Fig. 3 shows a schematic structural diagram of a multi-parameter probe according to a second embodiment of the present invention, as shown in fig. 2, the multi-parameter probe 1 further includes a chloride ion detecting electrode 20, a PH value detecting electrode 40, a temperature detecting electrode 50, and an independent reference electrode 30 corresponding to the chloride ion detecting electrode and/or the PH value detecting electrode, the diameter of the multi-parameter probe is Φ 30mm, the electrochemical noise matrix electrode unit 10, the chloride ion detecting electrode 20, the PH value detecting electrode 40, the temperature detecting electrode 50, and the independent reference electrode 30 corresponding to the chloride ion detecting electrode and/or the PH value detecting electrode are uniformly distributed, and are encapsulated with a high temperature resistant epoxy resin.
EXAMPLE III
A corrosion detection system according to a third embodiment of the present invention may include the above-mentioned multi-parameter probe and a sensor, where the sensor is connected to the multi-parameter probe, and is configured to extract a current signal and a voltage signal in a set electrical signal according to the electrical signal provided by the multi-parameter probe, and calculate one or more of the following according to the extracted current signal and the extracted voltage signal: corrosion rate and local corrosion tendency information, chloride ion concentration, PH or temperature value of the target area.
Fig. 4 is a schematic structural diagram of a corrosion monitoring system according to a third embodiment of the present invention, and as shown in fig. 4, the sensor 2 is connected to the first working electrode (W1), the second working electrode (W2), the third working electrode (W3), the first reference electrode (R1), the second reference electrode (R2), the third reference electrode (R3), the first auxiliary electrode (a1), the second auxiliary electrode (a2), and the third auxiliary electrode (A3) of the electrochemical noise electrode unit 10; and is also connected to the chloride ion detecting electrode 20, the independent reference electrode 30 corresponding to the chloride ion detecting electrode and/or the PH detecting electrode, the PH detecting electrode 40, and the temperature detecting electrode 50, respectively. The sensor 2 comprises an ammeter, which may preferably be a zero resistance ammeter, a voltmeter, which may be a high resistance voltmeter, and a calculation unit. The ammeter respectively outputs current information between a working electrode group and an auxiliary electrode group in the multi-parameter probe and current information of output current of the temperature detection electrode according to electric signals provided by the working electrode group, the auxiliary electrode group and the temperature detection electrode; the voltmeter outputs voltage information between the working electrode group and the reference electrode group in the multi-parameter probe 1, voltage information between the chloride ion detection electrode 20 and the independent reference electrode 30 corresponding to the chloride ion detection electrode and/or the PH detection electrode, and voltage information between the PH detection electrode 40 and the independent reference electrode 30 corresponding to the chloride ion detection electrode and/or the PH detection electrode, respectively, based on electrical signals provided by the working electrode group and the reference electrode group of the electrochemical noise matrix electrode unit 10 in the multi-parameter probe 1, the chloride ion detection electrode 20, the PH detection electrode 40, and the independent reference electrode 30 corresponding to the chloride ion detection electrode and/or the PH detection electrode. A calculating unit, connected to the current meter and the voltage meter respectively, for performing the following operations: calculating corrosion rate and local corrosion tendency information of the target area according to the current information between the working electrode group and the auxiliary electrode group and the voltage information between the working electrode group and the reference electrode group; determining the chloride ion concentration of the target area according to the voltage information between the chloride ion detection electrode and the independent reference electrode corresponding to the chloride ion detection electrode and/or the PH value detection electrode and a pre-stored potential-chloride ion concentration calibration curve; determining the PH value of the target area according to the voltage information between the PH value detection electrode and the independent reference electrode corresponding to the chloride ion detection electrode and/or the PH value detection electrode and a pre-stored potential-hydrogen ion concentration calibration curve; and calculating the resistance value of the working electrode group according to the current information between the working electrode group and the auxiliary electrode group and the current information of the output current of the temperature detection electrode, and determining the temperature value of the target area according to the calculated resistance value and a prestored resistance-temperature curve.
As shown in fig. 4, the system may further include a data processing platform 3, connected to the sensor 2, and configured to input the corrosion rate and local corrosion tendency information of the target region, the chloride ion concentration of the target region, the PH value of the target region, and the temperature value of the target region, which are provided by the sensor 2, into a pre-stored corrosion prediction model, and output a corresponding corrosion risk dynamic evaluation result through the corrosion prediction model.
Fig. 5 shows a schematic diagram of data transmission provided by the third embodiment of the present invention, and as shown in fig. 5, the working principle of each electrode is as follows:
(1) the electrochemical noise electrode matrix group consists of three electrode groups (a reference electrode group, a working electrode group and an auxiliary electrode group), and the current between the working electrode group and the auxiliary electrode group is measured by a zero-resistance ammeter and the voltage between the working electrode group and the reference electrode group is measured by a high-resistance voltmeter respectively. Three groups of potential noise signals and three groups of current noise signals are obtained through an A/D converter, and the noise resistance Rn, the pitting index LI, the skewness Sk and the kurtosis Ku of the potential and current signals are calculated according to a calculating unit of the sensor, wherein the uniform corrosion rate can be reflected by utilizing the Rn and matching with other parameters, and the change rule of the LI, the Sk and the Ku can be used for reflecting the local corrosion tendency.
The electrochemical noise parameter is based on statistical analysis of the potentiometric current signals. Wherein the noise resistance is calculated according to the following formula:
σ E and σ I are the standard deviations of the potential or current signals. Typically Rn is inversely proportional to the uniform corrosion rate and is close to the polarization resistance Rp.
Wherein, the corrosion current icorr is inversely proportional to the polarization resistance Rp:
wherein B is a constant value;
the corrosion rate CR is proportional to the corrosion current icorr:
wherein A is a constant value
Rn is substituted for Rp, and the etching rate is obtained by substituting the formula.
Pitting index:
σ I is the standard deviation of the current signal and RMSI is the root mean square of the current signal. It is generally accepted that LI approaching 1 indicates the occurrence of localized corrosion; while an LI close to 0 means that uniform corrosion of the electrode surface occurs or a passivation state is maintained.
Skewness:
xi is the measured potential or current value,
as an average, σ is the standard deviation of the potential or current, and n is the number of sampling points. Skewness describes the symmetry of the noise data distribution pattern, which is symmetric about the mean when skewness is 0. The noise signal skewness of the uniform erosion is close to 0.
Kurtosis:
xi is the measured potential or current value,
as an average, σ is the standard deviation of the potential or current, and n is the number of sampling points. Kurtosis describes how steep the profile of the noisy data is, and when the kurtosis is 3, the profile is as steep as the normal profile. The noise signal kurtosis of uniform erosion is close to 3.
(2) In the process of detecting the chloride ions, the potential difference between a chloride ion detection electrode 20(Ag/AgCl working electrode) and an independent reference electrode 30 (graphite reference electrode) corresponding to the chloride ion detection electrode and/or a PH value detection electrode is acquired through a high-resistance voltmeter, and the sensor 2 converts the potential difference into chloride ion concentration data through a computing unit according to a potential-chloride ion concentration calibration curve. The specific process is as follows:
the Ag/AgCl working electrode is arranged in the water phase at the tower top, and the liquid-film thereof generates a specific potential response value according to the Nernst equation:
Wherein
Under the condition of fixed ionic strength, the following can be obtained:
therefore, the potential of the chlorine ion detection electrode and the logarithm of the concentration of the chlorine ion are in linear relation, and the potential of the electrode under different concentrations of the chlorine ion can be calibrated and measured in advance
The calculation unit calculates the chloride ion concentration from the potential signal between the chloride ion measuring electrode and the separate reference electrode 30 corresponding to the chloride ion detecting electrode and/or the PH detecting electrode.
(3) In the process of detecting the pH value, the high resistance voltmeter can acquire the potential difference between the pH detection electrode 40(Ir/IrO2 working electrode) and the independent reference electrode 30 (graphite reference electrode) corresponding to the chloride ion detection electrode and/or the pH detection electrode, and the sensor 2 converts the potential difference into hydrogen ion concentration data through the calculation unit according to a potential-hydrogen ion concentration calibration curve, and transmits the hydrogen ion concentration data to the data processing platform 3.
The Ir/IrO2 working electrode is arranged in the water phase at the tower top, and the liquid-film thereof can generate a specific potential response value, and the following can be obtained by the same way:
calibrating and measuring the potential of the electrode under different hydrogen ion concentrations in advance
The calculation unit can calculate the pH value from the potential signal between the pH measuring electrode 40 and the separate reference electrode 30 corresponding to the chloride ion detecting electrode and/or the pH detecting electrode.
(4) The temperature measuring electrode 50 in the multi-parameter probe 1 can be made of PTC thermistor material, and the detected electric signal is converted into temperature value by the computing unit of the sensor and transmitted to the data processing platform 3.
The sensor 2 obtains the resistance value of the PTC thermistor electrode through measurement and calculation, and the temperature value of the environment (target area) where the multi-parameter probe 1 is located is determined according to a prestored resistance-temperature curve.
The sensor 2 transmits data such as average corrosion rate, local corrosion coefficient, chloride ion concentration, pH value, temperature and the like to the data processing platform 3 in real time, the data processing platform 3 determines a corrosion prediction model to which the information provided by the sensor 2 is input according to the placement position of the multi-parameter probe 1, and particularly, the information provided by the sensor 2 is input to the dew point corrosion prediction model under the condition that the multi-parameter probe 1 is arranged in a dew point area at the tower top of the oil refining device; under the condition that the multi-parameter probe 1 is arranged in a water tank at an ammonium salt corrosion prone position, the information provided by the sensor 2 is input into an ammonium salt corrosion prediction model, and under the condition that the multi-parameter probe 1 is arranged in both a tower top dew point region of the oil refining device and the water tank at the ammonium salt corrosion prone position, corresponding information is respectively input into the corresponding prediction models according to the arrangement position of the multi-parameter probe 1. And then the prediction model outputs a dynamic tower top corrosion risk evaluation result according to data such as average corrosion rate, local corrosion coefficient, chloride ion concentration, pH value, temperature and the like, so as to realize the dynamic evaluation and early warning functions of the tower top corrosion risk.
The memory may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (8)
1. A multi-parameter probe for corrosion monitoring, the multi-parameter probe comprising:
the electrochemical noise electrode unit comprises a working electrode group, a reference electrode group and an auxiliary electrode group, wherein the working electrode group, the reference electrode group and the auxiliary electrode group are used for outputting three groups of electric signals under the condition that a target area is corroded;
wherein the working electrode set comprises 3 working electrodes, the reference electrode set comprises 3 reference electrodes, and the auxiliary electrode set comprises 3 auxiliary electrodes;
the three working electrodes, the 3 reference electrodes and the 3 auxiliary electrodes are arranged in a set 3 x 3 matrix.
2. The multiparameter probe of claim 1, wherein the 3 working electrodes include a first working electrode (W1), a second working electrode (W2), and a third working electrode (W3);
the 3 reference electrodes include a first reference electrode (R1), a second reference electrode (R2), and a third reference electrode (R3);
the 3 auxiliary electrodes include a first auxiliary electrode (A1), a second auxiliary electrode (A2), and a third auxiliary electrode (A3);
the 3 × 3 matrix arrangement comprises the following arrangement modes:
3. the multiparameter probe of claim 1, wherein the multiparameter probe is disposed in the target region, wherein the target region is a dew point region at the top of a refinery tower and/or a water tank at a site susceptible to ammonium salt corrosion.
4. A multiparameter probe according to any one of claims 1-3, further comprising at least one of:
a chloride ion detecting electrode;
a pH value detection electrode;
a separate reference electrode corresponding to said chloride ion detecting electrode and/or said PH detecting electrode; and
a temperature detection electrode for detecting the temperature of the liquid crystal,
wherein, when the target area is corroded, the electrodes respectively output electric signals.
5. A corrosion detection system, comprising:
the multiparameter probe of any one of claims 1-4;
the sensor is connected with the multi-parameter probe and used for respectively extracting a current signal and a voltage signal in a set electric signal according to the electric signal provided by the multi-parameter probe and calculating one or more of the following according to the extracted current signal and the extracted voltage signal:
corrosion rate and local corrosion tendency information, chloride ion concentration, PH or temperature value of the target area.
6. The system of claim 5, wherein the sensor comprises an ammeter, a voltmeter;
wherein, the respectively extracting the current signal and the voltage signal in the setting electric signal according to the electric signal provided by the multi-parameter probe comprises:
the ammeter respectively outputs current information between a working electrode group and an auxiliary electrode group in the multi-parameter probe and current information of output current of the temperature detection electrode according to electric signals provided by the working electrode group, the auxiliary electrode group and the temperature detection electrode; and
the voltmeter outputs voltage information between the working electrode group and the reference electrode group corresponding to the chloride ion detection electrode and/or the pH value detection electrode, voltage information between the chloride ion detection electrode and the independent reference electrode corresponding to the chloride ion detection electrode and/or the pH value detection electrode, and voltage information between the pH value detection electrode and the independent reference electrode corresponding to the chloride ion detection electrode and/or the pH value detection electrode, according to electric signals provided by the working electrode group and the reference electrode group, the chloride ion detection electrode, the pH value detection electrode and the independent reference electrode corresponding to the chloride ion detection electrode and/or the pH value detection electrode in the multi-parameter probe.
7. The multiparameter probe of claim 6, wherein the sensor further comprises:
a calculating unit, connected to the current meter and the voltage meter respectively, for performing the following operations:
calculating corrosion rate and local corrosion tendency information of the target area according to the current information between the working electrode group and the auxiliary electrode group and the voltage information between the working electrode group and the reference electrode group;
determining the chloride ion concentration of the target area according to the voltage information between the chloride ion detection electrode and the independent reference electrode corresponding to the chloride ion detection electrode and/or the PH value detection electrode and a pre-stored potential-chloride ion concentration calibration curve;
determining the pH value of the target area according to the voltage information between the pH value detection electrode and the independent reference electrode corresponding to the chloride ion detection electrode and/or the pH value detection electrode and a pre-stored potential-hydrogen ion concentration calibration curve;
and calculating the resistance value of the working electrode group according to the current information between the working electrode group and the auxiliary electrode group and the current information of the output current of the temperature detection electrode, and determining the temperature value of the target area according to the calculated resistance value and a prestored resistance-temperature curve.
8. The system of claim 5, further comprising:
and the data processing platform is connected with the sensor and is used for inputting the corrosion rate and local corrosion tendency information of the target area, the chloride ion concentration of the target area, the PH value of the target area and the temperature value of the target area, which are provided by the sensor, into a pre-stored corrosion prediction model and outputting a corresponding corrosion risk dynamic evaluation result through the corrosion prediction model.
Priority Applications (1)
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