CN113008308A - Marine underwater corrosion environment monitoring system and method - Google Patents
Marine underwater corrosion environment monitoring system and methodDownload PDFInfo
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- CN113008308A CN113008308ACN202110318693.9ACN202110318693ACN113008308ACN 113008308 ACN113008308 ACN 113008308ACN 202110318693 ACN202110318693 ACN 202110318693ACN 113008308 ACN113008308 ACN 113008308A
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Abstract
Description
Technical Field
The application relates to the field of marine technologies, in particular to a marine underwater corrosion environment monitoring system and method.
Background
With the wider application of offshore steel materials, the corrosion of seawater to the steel materials becomes an inevitable problem. In order to analyze and discuss the complicated corrosion problem of the ocean and solve the problems that materials are seriously corroded and damaged, and the like, the establishment of a corrosion research system is necessary.
The first step of establishing a corrosion system is to carry out corrosion environment investigation, and the corrosion monitoring of the underwater part of the jacket of the ocean oil platform is mainly realized by a preset monitoring system. The potential and current values at different depths are monitored by installing a potential current probe at the underwater part of the jacket, and whether the jacket is protected or not is determined.
However, the conventional corrosion monitoring technology has difficulties in signal transmission, information extraction and the like, so that the detected information has discontinuity in time and has the defect of untimely information transmission.
Disclosure of Invention
In order to monitor the marine underwater corrosion environment in real time, the application provides a marine underwater corrosion environment monitoring system and method.
In a first aspect, the present application provides a marine underwater corrosion environment monitoring system, which adopts the following technical scheme:
a marine underwater corrosion environment monitoring system comprises a water environment sensor, a data acquisition module, a wireless underwater acoustic communication device and an information control center;
the water environment sensor is used for detecting seawater parameters, and the seawater parameters comprise one or more of a seawater dissolved oxygen value, a seawater corrosion potential, seawater conductivity, seawater pH, seawater flow velocity, seawater salinity and seawater temperature;
the data acquisition module is used for acquiring the seawater parameters detected by the water environment sensor;
the wireless underwater sound communication device is used for transmitting the seawater parameters acquired by the data acquisition module to the information control center;
the information control center is used for receiving and displaying the seawater parameters and giving an alarm when the seawater parameters exceed a preset threshold value.
By adopting the technical scheme, the water environment sensor is used for detecting the seawater dissolved oxygen value of the marine underwater corrosion environment, the seawater corrosion potential, the seawater conductivity, the seawater pH value, the seawater flow rate, the seawater salinity and the seawater temperature in real time, the data acquisition module is used for collecting the acquired seawater parameters and sending the collected seawater parameters to the information control center in real time through the wireless underwater acoustic communication device, so that the information control center can monitor the marine underwater corrosion environment, the information control center displays the water environment information in real time, technical personnel can record and analyze the influence factors of the marine underwater corrosion environment conveniently, the information control center sends out an alarm when one or more of the seawater parameters exceed a threshold value, and the working personnel can be prompted to maintain the underwater steel facilities in time.
Optionally, the wireless underwater acoustic communication device includes:
the first acoustic communication probe is connected with the data acquisition module and used for converting the seawater parameters into sound wave signals;
and the second acoustic communication probe is connected with the information control center and used for receiving and analyzing the acoustic wave signal to obtain the seawater parameter and transmitting the seawater parameter to the information control center.
By adopting the technical scheme, the first acoustic communication probe and the second acoustic communication probe transmit signals through sound waves, the acoustic communication probe is the best one of a plurality of modes of transmitting signals remotely in water at present, the sound wave signals can be transmitted remotely in water, and the acoustic communication probe has the advantages of resisting multipath effect, resisting time-varying effect, relieving signal attenuation and the like.
Optionally, the water environment sensor at least comprises a dissolved oxygen sensor, a corrosion potential sensor, a conductivity sensor, a seawater pH sensor, a seawater flow velocity sensor, a temperature sensor and a salinity sensor.
By adopting the technical scheme, the dissolved oxygen sensor is used for detecting the dissolved oxygen value of the seawater, the corrosion potential sensor is used for detecting the corrosion potential of the seawater, the conductivity sensor is used for detecting the conductivity of the seawater, the seawater pH sensor is used for detecting the pH value of the seawater, the seawater flow velocity sensor is used for detecting the flow velocity of the seawater, the temperature sensor is used for detecting the temperature of the seawater, and the salinity sensor is used for detecting the salinity of the seawater.
Optionally, the device further comprises a pressure chamber and a fixed support, wherein the pressure chamber is arranged on the fixed support, and the dissolved oxygen sensor, the corrosion potential sensor, the conductivity sensor, the seawater pH sensor, the seawater flow velocity sensor, the temperature sensor and the salinity sensor are detachably connected to the fixed support.
By adopting the technical scheme, the pressure chamber is connected with the fixing part, the pressure chamber can sink in seawater after being filled with water, the fixing support and the dissolved oxygen sensor, the corrosion potential sensor, the conductivity sensor, the seawater pH sensor, the seawater flow velocity sensor, the temperature sensor and the salinity sensor which are arranged on the fixing support can be driven to sink in seawater, and the water environment sensor can measure the dissolved oxygen value of the seawater, the corrosion potential of the seawater, the conductivity of the seawater, the salinity of the seawater and the temperature of the seawater.
Optionally, the pressure chamber is made of 316L material or titanium metal material, and the fixing bracket is made of 316L material or titanium metal material.
By adopting the technical scheme, both the 316L material and the titanium metal material have corrosion resistance in seawater.
Optionally, the system further comprises a power supply module, wherein the power supply module is connected with the data acquisition module and used for supplying power to the data acquisition module.
By adopting the technical scheme, the data acquisition module can normally work after being electrified.
In a second aspect, the present application provides a method for monitoring marine underwater corrosion environment, which adopts the following technical scheme:
sinking the fixed support into the seabed;
detecting a seawater dissolved oxygen value, a seawater corrosion potential, seawater conductivity, seawater pH, seawater flow velocity, seawater salinity and seawater temperature by a water environment sensor;
transmitting the seawater parameters to an information control center through a wireless underwater acoustic communication device;
and the information control center displays the seawater parameters and gives an alarm when the seawater parameters exceed a preset threshold value.
By adopting the technical scheme, the water environment sensor is used for detecting the seawater dissolved oxygen value of the marine underwater corrosion environment, the seawater corrosion potential, the seawater conductivity, the seawater pH value, the seawater flow rate, the seawater salinity and the seawater temperature in real time, the data acquisition module is used for collecting the acquired seawater parameters and sending the collected seawater parameters to the information control center in real time through the wireless underwater acoustic communication device, so that the information control center can monitor the marine underwater corrosion environment, the information control center displays the water environment information in real time, technical personnel can record and analyze the influence factors of the marine underwater corrosion environment conveniently, the information control center sends out an alarm when one or more of the seawater parameters exceed a threshold value, and the working personnel can be prompted to maintain the underwater steel facilities in time.
The utility model provides a marine underwater corrosion environment monitoring system and method, water environment sensor is to marine underwater corrosion environment's sea water dissolved oxygen value, the sea water corrosion potential, sea water conductivity, sea water pH, the sea water velocity of flow, the real-time detection of sea water salinity and sea water temperature, data acquisition module collects the sea water parameter of gathering and sends to information control center through wireless underwater acoustic communication device in real time, make information control center can implement the monitoring to marine underwater corrosion environment, information control center shows water environment information in real time, make things convenient for technical staff to take notes and analysis to marine underwater corrosion environment's influence factor, information control center sends the warning when one or more in the sea water parameter surpass the threshold value, can in time indicate the staff to maintain steel facility under water.
Drawings
FIG. 1 is a block diagram of a marine underwater corrosion environment monitoring system according to an embodiment of the present application.
FIG. 2 is a flowchart of a marine underwater corrosion environment monitoring method according to an embodiment of the present application.
Description of reference numerals: 1. a water environment sensor; 11. a dissolved oxygen sensor; 12. a corrosion potential sensor; 13. a conductivity sensor; 14. a pH sensor; 15. a flow rate sensor; 16. a salinity sensor; 17. a temperature sensor; 2. a data acquisition module; 3. a wireless underwater acoustic communication device; 31. a first acoustic communication probe; 32. a second acoustic communication probe; 4. and an information control center.
Detailed Description
Various exemplary embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. That is, the structures and methods herein are shown by way of example to illustrate different embodiments of the structures and methods of the present disclosure. Those skilled in the art will understand, however, that they are merely illustrative of exemplary ways in which the disclosure may be practiced and not exhaustive. Furthermore, the figures are not necessarily to scale, some features may be exaggerated to show details of particular components.
Additionally, techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification as appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
Offshore steel materials are used more and more widely, and corrosion becomes an inevitable problem. The marine environmental corrosion problem is a fundamental scientific problem in offshore engineering facility construction, oil and gas resource development and environmental protection. The development of marine environment investigation is an essential content for marine corrosion research, and has important significance on the anti-corrosion design of engineering materials. In order to analyze and discuss the complicated corrosion problem of the ocean and solve the problems that materials are seriously corroded and damaged, and the like, the establishment of a corrosion research system is necessary. The first step of establishing a corrosion system is to investigate the corrosion environment, study the corrosion factor characteristics of seawater, draw a corrosion map of a region according to the corrosion factor characteristics, and qualitatively evaluate the corrosivity of the marine region. According to the marine environmental parameters, the health condition of the marine engineering material can be monitored by combining a corrosion sensor. The corrosion of the steel structure of the offshore oil platform is a gradual process, and simultaneously is a process of increasing the danger gradually, and the conventional detection has discontinuity in time, so that the problem of untimely alarm can be brought, namely, the corrosion problem of the oil platform and the brought problems can not be found in time between the two detections. This problem can only be fundamentally solved by continuous automatic monitoring of the corrosion state.
Therefore, a marine underwater corrosion environment monitoring system is needed.
Referring to fig. 1, the marine underwater corrosion environment monitoring system comprises a water environment sensor 1, adata acquisition module 2, a wireless underwateracoustic communication device 3 and an information control center 4; the water environment sensor 1 is arranged in a water environment where an offshore steel facility is located, and is used for detecting seawater parameters influencing an underwater corrosion environment, the seawater parameters comprise one or more of a seawater dissolved oxygen value, a seawater corrosion potential, a seawater conductivity, a seawater pH value, a seawater flow rate, a seawater salinity and a seawater temperature, and when the seawater corrosion environment is researched, various seawater parameters need to be monitored, so that the water environment sensor 1 at least comprises a dissolvedoxygen sensor 11 for detecting the seawater dissolved oxygen value, acorrosion potential sensor 12 for detecting the seawater corrosion potential, aconductivity sensor 13 for detecting the seawater conductivity, apH sensor 14 for detecting the seawater pH value, aflow rate sensor 15 for detecting the seawater flow rate, asalinity sensor 16 for detecting the salinity and atemperature sensor 17 for detecting the seawater temperature.
For convenience of description, the above sensors are collectively referred to as a water environment sensor 1.
Thedata acquisition module 2 is connected to the water environment sensor 1, can acquire the sea water parameter that the water environment sensor 1 detected to export the sea water parameter to the information control center 4 through wireless underwateracoustic communication device 3, and the information control center 4 receives and shows the sea water parameter, and can send out the warning when the sea water parameter surpasss the threshold value.
Through the real-time detection to the sea water dissolved oxygen value, sea water corrosion potential, sea water conductivity, sea water pH, sea water velocity, sea water salinity and sea water temperature of water environment,data acquisition module 2 collects the sea water parameter that detects to send the sea water parameter to information control center 4 through wireless underwateracoustic communication device 3 in real time, make information control center 4 can implement the monitoring to the marine underwater corrosion environment, make things convenient for technical staff to carry out record and analysis to marine underwater corrosion environment's influence factor. The information control center 4 gives an alarm when one or more of the dissolved oxygen value of the seawater, the corrosion potential of the seawater, the conductivity of the seawater, the pH value of the seawater, the flow rate of the seawater, the salinity of the seawater and the temperature of the seawater exceed a threshold value, and can prompt workers to maintain the underwater steel facilities in time.
Taking an offshore oil platform as an example, the underwater part of a jacket of the offshore oil platform is corroded by seawater and is corroded and damaged by seawater, in order to timely acquire the corrosion condition of the underwater part of the jacket of the offshore oil platform and timely find that the underwater part of the jacket of the offshore oil platform is in a water environment when a problem occurs in the offshore oil platform, a water environment sensor 1 and a data acquisition module 2 are arranged, the data acquisition module 2 collects seawater parameters detected by the water environment sensor 1 and transmits the seawater parameters to an information control center 4 of the offshore oil platform through a wireless underwater acoustic communication device 3, a worker can analyze influence factors influencing the seawater corrosion of the underwater part of the jacket of the offshore oil platform according to the seawater parameters displayed by the information control center 4, and the information control center 4 plays a role in monitoring the underwater corrosion environment, when one or more of the seawater dissolved oxygen value, the seawater corrosion potential, the seawater conductivity, the seawater pH, the seawater flow rate, the seawater salinity and the seawater temperature exceed the alarm threshold value, the information control center 4 sends out an alarm to prompt a worker to check and maintain the underwater part of the oil platform jacket in time.
In the embodiment of the present application, the dissolvedoxygen sensor 11 may be a fluorescence dissolved oxygen sensor based on quenching principle of a specific substance in physics to active fluorescence. The blue light emitted from a Light Emitting Diode (LED) irradiates on the fluorescent substance on the inner surface of the fluorescent cap, the fluorescent substance on the inner surface is excited to emit red light, the concentration of oxygen molecules is calculated by detecting the phase difference between the red light and the blue light and comparing the phase difference with an internal calibration value, and the final value is output through automatic temperature and pressure compensation. The method has the advantages of no oxygen consumption, no flow rate limitation, no need of electrolyte, no maintenance and calibration, no interference of hydrogen sulfide and excellent stability. A temperature sensor is arranged in the temperature sensor, and the temperature is automatically compensated. Optical DO sensors are ideal for long-term monitoring plans due to their minimum maintenance requirements. They can be kept for several months without calibration, which is the greatest difference from other methods, and it is convenient in that no preheating time or stirring is required for detection.
In the embodiment of the application, thetemperature sensor 17, theconductivity sensor 13 and thesalinity sensor 16 can be integrated temperature, conductivity and salinity sensors, theconductivity sensor 16 adopts a new generation of four-electrode technology, the measurement range is wide, the measurement range is automatically switched, thetemperature sensor 17 is arranged in the sensor, and the real-time temperature compensation can be realized. The method has excellent anti-pollution capability, and polarization can not be generated even if the severe environment is monitored on line for a long time. Theinductive conductivity sensor 16 measures the conductivity by using the electromagnetic induction principle, the conductivity of the liquid is in a direct proportion relation with the induction voltage/the excitation voltage within a certain range, the excitation voltage is kept unchanged, and the conductivity is in a direct proportion with the induction voltage. Theinductive conductivity sensor 13 detector does not directly contact the measured liquid, and therefore, there is no problem of electrode polarization and electrode contamination.
In some embodiments, thedata acquisition module 2, the dissolvedoxygen sensor 11, thecorrosion potential sensor 12, thepH sensor 14, the seawaterflow rate sensor 15, and the integrated temperature, conductivity, and salinity sensors are detachably connected to a fixing bracket, when any one of the sensors is damaged, a technician can replace the damaged sensor, and the structure of the fixing bracket can be set according to the detected environment, which will not be described in detail herein. Fixedly connected with pressure chamber on the fixed bolster, the gravity that pressure chamber self received in order to increase pressure chamber can fill water to make pressure chamber and support sink in the sea water jointly, the detection of water environment sensor 1 to the sea water corrosive environment of being convenient for. Both the pressure chamber and the mounting bracket may be made of corrosion resistant 316L material or titanium metal material.
In some embodiments, thedata acquisition module 2 is connected to a power supply module, the power supply module is used for supplying power to thedata acquisition module 2, the power supply module may be a battery pack, the battery pack is configured with a special pressure-resistant battery compartment, and the battery pack equipped with the pressure-resistant battery compartment can be applied to water depths of 1-100 meters to supply power to the underwaterdata acquisition module 2. The diameter of the cell in this example is about 170 mm; a height of about 520 mm; nominal capacity 530 Ah; nominal voltage 16.4 v; the working voltage is 12-16.8 v; maximum continuous working current 5A and maximum pulse current 9A; the working temperature is-55 to +85 ℃. The group battery fixed connection is on the fixed bolster, and is concrete, and the group battery can pass through the staple bolt and connect on the fixed bolster.
In the embodiment of the present application, the wireless underwateracoustic communication device 3 includes a firstacoustic probe 31 and a secondacoustic probe 32, the firstacoustic probe 31 may be an underwater acoustic communication Modem, and may be an ATM-924 specific model, and the secondacoustic probe 32 may be an ATM-903 specific model. Firstacoustic communication probe 31 is fixed on the fixed bolster to wired connection has an RS485 interface indata acquisition module 2, specifically, has on thedata acquisition module 2, and firstacoustic probe 31 can pass through RS485 interface connection indata acquisition module 2. The first acoustic probe can convert the seawater dissolved oxygen value, the seawater corrosion potential, the seawater conductivity, the seawater pH, the seawater flow velocity, the seawater salinity and the seawater temperature collected by thedata collection module 2 into sound wave signals and send the sound wave signals; the secondacoustic communication probe 32 is wired to the information control center 4, and is capable of receiving and analyzing the acoustic signal, and outputting the analyzed seawater dissolved oxygen value, seawater corrosion potential, seawater conductivity, seawater pH, seawater flow rate, seawater salinity, and seawater temperature to the information control center 4. The firstacoustic communication probe 31 and the secondacoustic communication probe 32 transmit signals through sound waves, which is the best mode among the multiple modes of transmitting signals remotely in water at present, and the sound wave signals can be remotely transmitted in water, so that the acoustic communication probe has the advantages of resisting multipath effects, resisting time-varying effects, relieving signal attenuation and the like.
It should be noted that the water environment sensor 1, the battery pack and the firstacoustic communication probe 31 are all connected with thedata acquisition module 2 through pluggable underwater connectors, so that the water environment sensor 1, the battery pack, the firstacoustic communication probe 31 and thedata acquisition module 2 can be conveniently replaced, and the underwater connecting wires are all high-strength seawater-resistant special cables.
The information control center 4 includes a controller, a display and an alarm, the input end of the controller is connected to the secondacoustic communication probe 32, and the output end is connected to the display and the alarm. The controller is used for receiving the seawater dissolved oxygen value, the seawater corrosion potential, the seawater conductivity, the seawater pH, the seawater flow velocity, the seawater salinity and the seawater temperature which are obtained by analyzing the secondacoustic communication probe 32, and the controller controls the display to display the seawater dissolved oxygen value, the seawater corrosion potential, the seawater conductivity, the seawater pH, the seawater flow velocity, the seawater salinity and the seawater temperature in real time, so that a worker can conveniently read the information of the seawater corrosion environment in real time.
And under the normal condition of the seawater corrosion environment, the seawater dissolved oxygen value, the seawater corrosion potential, the seawater conductivity, the seawater pH, the seawater flow rate, the seawater salinity and the seawater temperature are all in the threshold range, and when one or more of the seawater dissolved oxygen value, the seawater corrosion potential, the seawater conductivity, the seawater pH, the seawater flow rate, the seawater salinity and the seawater temperature exceed the threshold, the seawater corrosion environment is abnormal, and the underwater steel facilities are corroded and damaged. Therefore, when one or more of the seawater dissolved oxygen value, the seawater corrosion potential, the seawater conductivity, the seawater pH, the seawater flow velocity, the seawater salinity and the seawater temperature exceed the threshold value, the controller controls the alarm to give an alarm to prompt a worker to check and maintain the underwater equipment in time.
In a specific example, when the seawater conductivity exceeds a threshold value, the alarm gives out a voice alarm of 'seawater conductivity abnormity', and a display numerical value of the seawater conductivity on the display is marked with red; when the sea water conductivity and the sea water dissolved oxygen value exceed the threshold values, the alarm sends out a voice alarm of 'the sea water conductivity is abnormal and the sea water dissolved oxygen value is abnormal', and the display numerical values of the sea water conductivity and the sea water dissolved oxygen value on the display are marked with red.
In another aspect, the application also provides a marine underwater corrosion environment monitoring method.
Referring to fig. 2, the method comprises the steps of:
and step 240, the information control center 4 displays the seawater parameter and gives an alarm when the seawater parameter exceeds an alarm threshold value.
The seawater dissolved oxygen value, the seawater corrosion potential, the seawater conductivity, the seawater pH, the seawater flow velocity, the seawater salinity and the seawater temperature of the water environment are detected in real time, and the detected seawater pH and the detected seawater flow velocity are sent to the information control center 4 through the wireless underwateracoustic communication device 3 in real time, so that the information control center 4 can implement and monitor the marine underwater corrosion environment, and technicians can record and analyze the influence factors of the marine underwater corrosion environment conveniently. The information control center 4 gives an alarm when one or more of the dissolved oxygen value of the seawater, the corrosion potential of the seawater, the conductivity of the seawater, the pH value of the seawater, the flow rate of the seawater, the salinity of the seawater and the temperature of the seawater exceed a threshold value, and can prompt workers to maintain the underwater steel facilities in time.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the described method may refer to the corresponding process in the foregoing system embodiment, and is not described herein again.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
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