Multi-medium corrosion detection method and system for high-temperature pressure-bearing equipment

Abstract

The invention discloses a multi-medium corrosion detection method and system for high-temperature pressure-bearing equipment. The detection method comprises the following steps: S100, setting a characteristic frequency interval according to the type of a medium; s200, the vibration signal generating device sends a vibration signal to the to-be-tested equipment, and the to-be-tested equipment generates a to-be-tested vibration signal; s300, the vibration signal receiving device receives the vibration signal to be detected and converts the signal to be detected into a frequency interval to be detected; step S400, the vibration signal receiving device compares the to-be-tested frequency interval with the characteristic frequency interval, and outputs the corrosion condition of the to-be-tested equipment according to the comparison result; in the step S400, if the overlap ratio of the to-be-measured frequency interval and the characteristic frequency interval is not smaller than a preset value, the corrosion condition is normal, and if the overlap ratio of the to-be-measured frequency interval and the characteristic frequency interval is smaller than the preset value, the corrosion condition is abnormal; the preset value is 80%. The device corrosion condition is effectively reflected by analyzing the frequency characteristics of the vibration response of the device, and the efficiency of detecting the device corrosion condition is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment corrosion detection, and particularly to a multi-media corrosion detection method and system for high-temperature pressure-bearing equipment. Background Art

[0002] High-temperature pressure-bearing equipment such as petrochemical reactors, boilers, and pressure pipelines are widely used in industrial production. They are long-term in high-temperature, high-pressure, and multi-media corrosion environments, and are prone to material deterioration and corrosion damage, resulting in equipment failure and even safety accidents. Therefore, real-time and accurate detection and evaluation of the corrosion state of high-temperature pressure-bearing equipment are of great significance for ensuring the safe operation of equipment and extending its service life. Currently, the corrosion detection methods for high-temperature pressure-bearing equipment mainly include the following: Electrochemical detection method: The corrosion rate is evaluated by measuring parameters such as corrosion current and potential. However, the signal stability of this method is poor in high-temperature and high-pressure environments, and it is difficult to achieve in-situ dynamic monitoring. Ultrasonic detection method: The wall thickness change of the equipment is measured by ultrasonic waves. However, the sensitivity of this method to minor corrosion damage is low, and it cannot reflect the synergistic effect of corrosion media. Coupon weight loss method: The corrosion rate is evaluated by regularly taking out coupons and measuring the mass loss. However, this method can only provide off-line data and cannot achieve real-time monitoring. Traditional methods mostly target single-media environments and cannot simulate the synergistic effect of multiple corrosion media in actual working conditions, resulting in a large deviation between the detection results and the actual corrosion situation. Existing detection methods mostly rely on off-line measurement and cannot achieve real-time monitoring and early warning of the equipment operation state. In high-temperature and high-pressure environments, sensor signals are easily interfered, and the detection accuracy is difficult to meet the engineering requirements. Therefore, it is very necessary to provide a reliable multi-media corrosion detection method and system for high-temperature pressure-bearing equipment. Summary of the Invention

[0003] The present invention aims to solve at least one of the above technical problems.

[0004] To solve the above problems, the first object of the present invention is to provide a multi-media corrosion detection method for high-temperature pressure-bearing equipment.

[0005] The second object of the present invention is to provide a multi-media corrosion detection system for high-temperature pressure-bearing equipment.

[0006] To achieve the first object of the present invention, the present invention provides a multi-media corrosion detection method for high-temperature pressure-bearing equipment, which includes: Step S100: Set the characteristic frequency range according to the type of medium; Step S200: The vibration signal generating device sends a vibration signal to the device to be measured, and the device to be measured generates a vibration signal to be measured; Step S300: The vibration signal receiving device receives the vibration signal to be measured and converts the signal to be measured into a frequency range to be measured; Step S400: The vibration signal receiving device compares the frequency range to be measured with the characteristic frequency range and outputs the corrosion condition of the device to be measured according to the comparison result.

[0007] By setting the characteristic frequency range according to the type of medium, it is possible to effectively identify and distinguish the effects of different corrosive media on the equipment, solve the problem that the detection results of traditional methods do not match the actual working conditions in a single medium environment, and is applicable to the multi-medium collaborative corrosion detection under complex working conditions, significantly improving the accuracy and reliability of the detection results. By using the vibration signal analysis technology, it is possible to collect the vibration response signals in real time during the operation of the equipment, and realize the dynamic evaluation of the corrosion state through the fast signal processing and analysis module, overcoming the lag of traditional off-line detection methods, being able to detect the abnormal corrosion of the equipment in time, and avoiding the sudden equipment failure caused by corrosion. By comparing the coincidence degree between the frequency range to be measured and the characteristic frequency range, it is possible to accurately reflect the small changes in the structural stiffness of the equipment, thereby accurately evaluating the degree of corrosion damage, with high detection sensitivity, being able to identify early corrosion damage, avoiding missed detection or misdetection, and significantly reducing the operation risk of the equipment. By using the vibration signal transmitting and receiving device, there is no need to conduct destructive sampling or shutdown detection on the equipment, realizing non-intrusive detection, reducing the equipment shutdown time, lowering the detection cost, and at the same time avoiding the equipment damage caused by sampling.

[0008] In the above technical solution, in step S400, if the coincidence degree between the frequency range to be measured and the characteristic frequency range is not less than the preset value, the corrosion condition is normal; if the coincidence degree between the frequency range to be measured and the characteristic frequency range is less than the preset value, the corrosion condition is abnormal.

[0009] The degree of corrosion is evaluated through this quantitative index of coincidence degree. The higher the coincidence degree, the lighter the corrosion of the equipment, and it may even be in a normal state; on the contrary, the lower the coincidence degree, the more serious the corrosion of the equipment. This makes the detection results more objective and credible. The preset value, as a threshold, can effectively avoid misjudgment caused by small vibration fluctuations. For example, some normal vibration changes may cause the frequency range to deviate slightly from the characteristic frequency range. If judged only by simple coincidence or not, it is easy to cause false alarms. By setting the preset value, these small normal fluctuations can be filtered out, and only significant frequency changes are responded to, thereby reducing the misjudgment rate and improving the detection accuracy. The quantitative coincidence degree result can provide more accurate guidance for equipment maintenance. For example, different maintenance strategies can be formulated according to the coincidence degree value to avoid over-maintenance or delaying the maintenance time.

[0010] In any of the above technical solutions, the preset value is eighty percent.

[0011] Eighty percent of the preset value can also ensure the reliability of the detection results. It can filter out some minor frequency fluctuations caused by environmental factors, normal operation of equipment, etc., and avoid false alarms. If the preset value is too low, such as fifty percent, false alarms may occur due to frequency changes caused by some irrelevant factors, reducing the credibility of the detection results. Selecting eighty percent as the preset value is an empirical optimization that achieves a good balance between sensitivity and reliability. It can not only detect corrosion problems in a timely manner but also avoid false reports, thus improving the practicality and effectiveness of the detection method.

[0012] To achieve the second object of the present invention, the present invention provides a multi-medium corrosion detection system for high-temperature pressure-bearing equipment, which is used to implement the multi-medium corrosion detection method for high-temperature pressure-bearing equipment in any of the above technical solutions. It includes: a vibration signal generating device; a vibration signal receiving device, and the vibration signal receiving device is connected to the vibration signal generating device.

[0013] Different from the traditional destructive detection method, this system judges the corrosion situation by receiving and analyzing the vibration signals of the equipment, without the need to disassemble the equipment or perform large-scale invasive operations. This avoids the losses caused by production shutdowns and reduces safety risks. Even for micro-invasive operations, the degree of invasion is much lower than that of traditional methods. The system can work in harsh environments of high temperature and high pressure and is applicable to various media. This solves the problem that traditional detection methods are difficult to apply in these extreme environments. By continuously monitoring the vibration signals, the system can evaluate the corrosion situation of the equipment in real time or regularly, discover potential risks in a timely manner, and give early warnings or perform maintenance to avoid equipment failure and accidents caused by corrosion.

[0014] In the above technical solution, the vibration signal receiving device is provided with a signal processing and analysis module.

[0015] The original vibration signals usually contain a large amount of noise and interference and are difficult to be directly used for corrosion detection. The signal processing and analysis module can perform processing such as filtering, noise reduction, and feature extraction on the received signals, remove interference information, and extract feature signals related to corrosion, thereby improving the detection accuracy and precision. This can include various signal processing techniques such as Fourier transform, wavelet transform, and time-frequency analysis to identify the small changes in vibration patterns caused by corrosion. The signal processing and analysis module can automatically identify and judge the corrosion degree of the equipment according to the preset algorithms and thresholds, without manual intervention, improving the detection efficiency and reducing human errors.

[0016] In any of the above technical solutions, the vibration signal receiving device is provided with a corrosion situation evaluation module.

[0017] The corrosion condition evaluation module directly converts the processed signal data into specific information about the corrosion state of the equipment. This avoids the user having to interpret complex signal data and instead directly obtains intuitive evaluation results such as "slight corrosion", "medium corrosion", "severe corrosion", etc., or more quantitative evaluations such as corrosion depth, percentage of corrosion area, etc. The module encapsulates the complex signal analysis process, and the user does not need to have professional signal processing knowledge. Just by viewing the corrosion condition report output by the evaluation module, the user can understand the corrosion state of the equipment. This simplifies the operation process and reduces the requirements for the technical level of the operator.

[0018] In any of the above technical solutions, the vibration signal receiving device is provided with a data storage and visualization module.

[0019] The data storage module can permanently store the vibration signal data and corrosion evaluation results of the equipment, which enables long-term monitoring of the corrosion condition of the equipment. By analyzing the historical data, the trend of corrosion development can be identified, and future corrosion risks can be predicted. This helps to formulate more effective maintenance strategies. The stored data can be used to trace the occurrence and development process of equipment corrosion, which is convenient for diagnosing equipment failures and performing traceability analysis to determine the causes and influencing factors of corrosion. This is of great significance for improving equipment design and material selection, as well as enhancing the corrosion resistance of the equipment. Through network connection, the data storage and visualization module can achieve remote monitoring and management, allowing users to view the corrosion state of the equipment anytime and anywhere and take corresponding maintenance measures in a timely manner. This is especially applicable to distributed or difficult-to-reach directly equipment. Brief Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will discuss the drawings required for describing the embodiments or the prior art. Obviously, the technical solutions described in conjunction with the drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other embodiments and their drawings can be obtained based on these embodiments shown in the drawings.

[0021] Figure 1 is the main flowchart of the multi-media corrosion detection method for high-temperature pressure-bearing equipment provided by the present invention.

[0022] Figure 2 is the module diagram of the multi-media corrosion detection system for high-temperature pressure-bearing equipment provided by the present invention. Detailed Embodiments

[0023] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following provides a detailed description of specific embodiments of the present invention with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. Many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0024] As Figure 1 shown, an embodiment of the present invention provides a multi - medium corrosion detection method for high - temperature pressure - bearing equipment, which includes: Step S100: Set a characteristic frequency range according to the type of medium; Step S200: The vibration signal generating device sends a vibration signal to the device under test, and the device under test generates a vibration signal to be measured; Step S300: The vibration signal receiving device receives the vibration signal to be measured and converts the signal to be measured into a frequency range to be measured; Step S400: The vibration signal receiving device compares the frequency range to be measured with the characteristic frequency range and outputs the corrosion condition of the device under test according to the comparison result; In Step S400, if the coincidence degree between the frequency range to be measured and the characteristic frequency range is not less than the preset value, the corrosion condition is normal; if the coincidence degree between the frequency range to be measured and the characteristic frequency range is less than the preset value, the corrosion condition is abnormal; the preset value is eighty percent.

[0025] In this embodiment, by setting the characteristic frequency range according to the type of medium, it effectively identifies and differentiates the influence of different corrosive media on the equipment, and uses vibration signal analysis technology to collect vibration response signals in real - time during the operation of the equipment, and realizes the dynamic assessment of the corrosion state through a fast signal processing and analysis module. Among them, the assessment of the corrosion condition is by comparing whether the coincidence degree between the frequency range to be measured and the characteristic frequency range is lower than eighty percent. If it is lower than eighty percent, it indicates that the corrosion condition is abnormal; if it is not lower than eighty percent, it indicates that the corrosion condition is normal. And a vibration signal transmitting and receiving device is used, without the need for destructive sampling or shutdown detection of the equipment, realizing non - invasive detection and reducing the detection cost.

[0026] As Figure 2 shown, an embodiment of the present invention provides a multi - medium corrosion detection system for high - temperature pressure - bearing equipment, which includes: a vibration signal generating device; a vibration signal receiving device, the vibration signal receiving device is connected to the vibration signal generating device; the vibration signal receiving device is provided with a signal processing and analysis module; the vibration signal receiving device is provided with a corrosion condition assessment module; the vibration signal receiving device is provided with a data storage and visualization module.

[0027] In this embodiment, the functions of signal generation, reception, processing, evaluation, and visualization are integrated into one, realizing an automated closed-loop detection process, reducing manual intervention links, and improving detection efficiency and consistency. Each functional module is seamlessly connected, and signal acquisition and processing are synchronized in real time to ensure the integrity and timeliness of detection data. Through the signal processing and analysis module, real-time signal conversion, noise filtering, and feature extraction are realized, improving the signal quality, enhancing the detection sensitivity, and reducing the false judgment rate. The corrosion situation evaluation module provides quantitative evaluation indicators and a multi-level early warning mechanism to achieve accurate grading of the corrosion degree and support differential maintenance decisions. The data storage and visualization module realizes historical data traceability, trend analysis, and graphical display, facilitating long-term monitoring and analysis, intuitively showing the corrosion development process, and supporting predictive maintenance. Moreover, this system device adopts special materials and structural designs to be able to work stably in a high-temperature environment above 300°C, with strong anti-electromagnetic interference ability to ensure the reliability of detection data.

[0028] In the present invention, terms such as "installation", "connection", "attachment", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "attachment" can be a direct attachment or an indirect attachment through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as a limitation to the present invention.

[0030] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0031] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be determined by the scope defined by the claims.

Claims

1. A multi-media corrosion detection method for high-temperature pressure-bearing equipment, characterized in that Including: Step S100: Set the characteristic frequency range according to the type of medium; Step S200: The vibration signal generating device sends a vibration signal to the device under test, and the device under test generates a vibration signal to be measured; Step S300: The vibration signal receiving device receives the vibration signal to be measured and converts the signal to be measured into a frequency range to be measured; Step S400: The vibration signal receiving device compares the frequency range to be measured with the characteristic frequency range and outputs the corrosion condition of the device under test according to the comparison result.

2. The multi-media corrosion detection method for high-temperature pressure-bearing equipment according to claim 1, wherein, In step S400, if the coincidence degree between the frequency range to be measured and the characteristic frequency range is not less than the preset value, the corrosion condition is normal; if the coincidence degree between the frequency range to be measured and the characteristic frequency range is less than the preset value, the corrosion condition is abnormal.

3. The multi-media corrosion detection method for high-temperature pressure-bearing equipment according to claim 2, characterized in that, The preset value is eighty percent.

4. A multi-media corrosion detection system for high-temperature pressure-bearing equipment, which is used to implement the multi-media corrosion detection method for high-temperature pressure-bearing equipment according to any one of claims 1 to 4, characterized in that, Including: Vibration signal generating device; Vibration signal receiving device, which is connected to the vibration signal generating device.

5. The multi-media corrosion detection system for high-temperature pressure-bearing equipment according to claim 4, characterized in that, The vibration signal receiving device is provided with a signal processing and analysis module.

6. The multi-media corrosion detection system for high-temperature pressure-bearing equipment according to claim 4, wherein The vibration signal receiving device is provided with a corrosion condition evaluation module.

7. The multi-media corrosion detection system for high-temperature pressure-bearing equipment according to claim 4, wherein, The vibration signal receiving device is provided with a data storage and visualization module.

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