Device and Method for Inhibiting Corrosion Damage of Recirculating Cooling Water Pipeline

Abstract

The present invention relates to the technical field of safety devices for cooling water pipes, and discloses a device and method for inhibiting corrosion damage of a circulating cooling water pipeline. The corrosion damage inhibition processing device includes a liquid storage tank, a corrosion damage detection mechanism, and a controller. The liquid storage tank is filled with a long-chain polymer solution. The liquid storage tank is connected to the circulating cooling water pipeline through a filling pipeline, and an electric valve is installed on the filling pipeline. The corrosion damage detection mechanism includes a corrosion damage sensor and a signal processor. The corrosion damage sensor is installed on the circulating cooling water pipeline, and the signal processor is electrically connected to the corrosion damage sensor. Both the signal processor and the electric valve are electrically connected to the controller. The device for inhibiting corrosion damage of the circulating cooling water pipeline can realize the inhibition treatment of corrosion damage of the circulating cooling water pipeline, and achieve the purpose of improving the reliability and safety of the circulating cooling water system.

Description

Technical Field

[0001] The present invention relates to the technical field of safety devices for circulating cooling water pipelines, and particularly to a device and method for inhibiting corrosion damage of a circulating cooling water pipeline. Background Art

[0002] Conventional cooling water systems can be divided into seawater cooling and fresh water cooling according to the cooling medium, and can be divided into open cooling and closed-loop cooling according to the cooling method. The ship cooling system mainly adopts a central cooling system at present, which is composed of a seawater system, a low-temperature fresh water circuit system and a high-temperature fresh water circuit system. The working principle is to use a seawater pump to transport seawater outside the ship into the central cooler to cool the low-temperature fresh water circuit, and use the low-temperature fresh water to cool the low-temperature components and the high-temperature fresh water circuit, and the high-temperature fresh water is used to cool the high-temperature components. The cooling of both high-temperature fresh water and low-temperature fresh water is a circulating process, which is closed-loop cooling. The seawater system is used to cool the central cooler and is open cooling.

[0003] Although fresh water is not highly corrosive compared to seawater, during the closed-loop circulation process, the water quality will deteriorate with the increase in operation time. Moreover, in flowing fresh water, on the one hand, the increase in dissolved oxygen in the water increases the tendency of local corrosion; on the other hand, under the combined action of electrochemical corrosion and hydrodynamic factors, erosion-corrosion characteristics will also occur. If seawater in the seawater pipeline leaks into the fresh water pipeline, it will greatly accelerate the corrosion of the fresh water pipeline. At present, most existing studies focus on the corrosion damage of seawater pipelines, such as increasing filtration and other means, while often ignoring the research on the control of corrosion damage of circulating cooling water pipelines. As the pipeline directly exchanging heat with in-ship equipment, it is necessary to inhibit the development of its corrosion damage. Summary of the Invention

[0004] The embodiments of the present invention provide a device and method for inhibiting corrosion damage of a circulating cooling water pipeline, so as to solve the problem of how to effectively inhibit the development of corrosion damage of a circulating cooling water pipeline, and improve the operation safety of the circulating cooling water pipeline.

[0005] The embodiments of the present invention provide a device for inhibiting corrosion damage of a circulating cooling water pipeline, which includes a liquid storage tank, a corrosion damage detection mechanism and a controller. The liquid storage tank is filled with a long-chain polymer solution. The liquid storage tank is connected to the circulating cooling water pipeline through a filling pipeline, and an electric valve is installed on the filling pipeline. The corrosion damage detection mechanism includes a corrosion damage sensor and a signal processor. The corrosion damage sensor is installed on the circulating cooling water pipeline, and the signal processor is electrically connected to the corrosion damage sensor. Both the signal processor and the electric valve are electrically connected to the controller.

[0006] Among them, the corrosion damage sensor is a guided wave sensor, and the signal processor is a guided wave detector. The guided wave detector is used to emit an excitation signal and excite ultrasonic guided waves on the circulating cooling water pipeline through the guided wave sensor; the guided wave sensor is used to collect the echo signal generated by the reflection of the ultrasonic guided wave at the corrosion damage and send the echo signal to the guided wave detector; the guided wave detector obtains the corrosion damage size value on the circulating cooling water pipeline based on the echo signal and sends the corrosion damage size value to the controller.

[0007] Among them, the guided wave sensor includes a transmitting coil winding and a receiving coil winding wound around the circulating cooling water pipeline. The guided wave detector includes a transmitting module, a receiving module, and a processing module. The input end of the transmitting module is electrically connected to the controller, and the output end of the transmitting module is electrically connected to the input end of the transmitting coil winding to excite ultrasonic guided waves on the circulating cooling water pipeline through the transmitting coil winding;

[0008] The output end of the receiving coil winding, the receiving module, the processing module, and the controller are connected in sequence to convert the echo signal into an electrical signal and send it to the controller.

[0009] Among them, the corrosion damage sensor is a fiber Bragg grating sensor, and the signal processor is an optical signal demodulator; the optical signal demodulator is used to emit an optical signal, and the optical signal is reflected back to the optical signal demodulator by the fiber Bragg grating sensor. The optical signal demodulator obtains the corrosion damage size value on the circulating cooling water pipeline based on the reflected optical signal and sends the detected corrosion damage size value to the controller.

[0010] Among them, multiple fiber Bragg grating sensors are spaced apart and distributed on the same optical fiber. The optical signal demodulator includes a broadband light source, a coupler, and a demodulation module. The broadband light source, the coupler, and multiple fiber Bragg grating sensors are connected in sequence, and the demodulation module is connected to the coupler; the input end of the broadband light source is electrically connected to the controller, and the output end of the demodulation module is electrically connected to the controller.

[0011] Among them, it further includes a first flowmeter installed on the circulating cooling water pipeline and a second flowmeter installed on the filling pipeline. Both the first flowmeter and the second flowmeter are electrically connected to the controller.

[0012] Among them, the long-chain polymer solution is a polyacrylamide solution, a polyvinyl alcohol solution, a polyethylene glycol solution, a polyacrylic acid solution, or a polymethacrylic acid solution.

[0013] An embodiment of the present invention further provides an inhibition method using the corrosion damage inhibition device for the circulating cooling water pipeline as described above, including:

[0014] The corrosion damage sensor processes the detected corrosion damage size signal through a signal processor and sends it to the controller. The controller takes the first derivative of the corrosion damage size value with respect to time to obtain the measured corrosion rate value;

[0015] When the measured corrosion rate value is greater than the preset corrosion rate value, the controller sends an opening signal to the electric valve, and the long-chain polymer solution enters the circulating cooling water pipeline through the filling pipeline;

[0016] When the measured corrosion rate value is less than or equal to the preset corrosion rate value, the controller sends a closing signal to the electric valve.

[0017] Wherein, after the long-chain polymer solution enters the circulating cooling water pipeline through the filling pipeline and before the controller sends a closing signal to the electric valve when the measured corrosion rate value is less than or equal to the preset corrosion rate value, it further includes:

[0018] The controller obtains the long-chain polymer concentration value in the circulating cooling water pipeline based on the long-chain polymer solution flow rate and the cooling water flow rate;

[0019] When the long-chain polymer concentration value in the circulating cooling water pipeline is less than the preset concentration value and the concentration difference is greater than the preset concentration difference, the controller sends an increased opening signal to the electric valve; when the long-chain polymer concentration value in the circulating cooling water pipeline is less than the preset concentration value and the concentration difference is less than or equal to the preset concentration difference, the controller sends a decreased opening signal to the electric valve; when the long-chain polymer concentration value in the circulating cooling water pipeline is greater than or equal to the preset concentration value, the controller sends a closing signal to the electric valve.

[0020] The corrosion damage inhibition device and inhibition method for the circulating cooling water pipeline provided by the embodiment of the present invention. The corrosion damage inhibition device monitors the corrosion rate of the circulating cooling water pipeline, and when the corrosion damage expands and intensifies, it timely injects the long-chain polymer solution into the circulating cooling water pipeline. The long-chain polymer stabilizes the cooling water flow and reduces the friction resistance of the cooling water in the pipeline. The corrosion damage inhibition device for the circulating cooling water pipeline can achieve the inhibition treatment of the corrosion damage of the circulating cooling water pipeline, and achieve the purpose of improving the reliability and safety of the circulating cooling water system. Description of the Drawings

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0022] Figure 1 It is a schematic diagram of a device for suppressing corrosion damage of a circulating cooling water pipeline in an embodiment of the present invention;

[0023] Figure 2 It is a relationship diagram between the concentration of long-chain polymer and the corrosion rate in an embodiment of the present invention;

[0024] Figure 3 It is an installation schematic diagram of a corrosion damage detection mechanism in an embodiment of the present invention;

[0025] Figure 4 It is another installation schematic diagram of a corrosion damage detection mechanism in an embodiment of the present invention.

[0026] Description of reference numerals:

[0027] 1, liquid storage tank; 2, corrosion damage sensor; 21, guided wave sensor;

[0028] 211, transmitting coil winding; 212, receiving coil winding; 22, fiber Bragg grating sensor;

[0029] 3, signal processor; 31, guided wave detector; 311, transmitting module;

[0030] 312, receiving module; 313, processing module; 32, optical signal demodulator;

[0031] 321, broadband light source; 322, coupler; 323, demodulation module;

[0032] 324, optical fiber; 4, controller; 5, filling pipeline;

[0033] 51, electric valve; 6, circulating cooling water pipeline; 7, cooling water pump;

[0034] 8, cooling water user; 9, cable; 10, cooler. Detailed implementation manners

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly defined and limited, terms such as "upper", "lower", "left", "right", etc. are only used to represent relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0037] It should be noted that unless otherwise clearly defined and limited, the term "connection" should be understood in a broad sense. For example, it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the invention can be understood according to specific circumstances.

[0038] As Figure 1 shown, a corrosion damage suppression device for a circulating cooling water pipeline provided by an embodiment of the present invention includes a liquid storage tank 1, a corrosion damage detection mechanism, and a controller 4. The liquid storage tank 1 is filled with a long-chain polymer solution. The liquid storage tank 1 is connected to the circulating cooling water pipeline 6 through a filling pipeline 5, and an electric valve 51 is installed on the filling pipeline 5. The corrosion damage detection mechanism includes a corrosion damage sensor 2 and a signal processor 3. The corrosion damage sensor 2 is installed on the circulating cooling water pipeline 6, and the signal processor 3 is electrically connected to the corrosion damage sensor 2 through a cable 9. Both the signal processor 3 and the electric valve 51 are electrically connected to the controller 4 through the cable 9.

[0039] Specifically, the liquid storage tank 1 is a pressure-bearing container, and its pressure can be higher than the operating pressure of the circulating cooling water pipeline 6 to facilitate the replenishment of the long-chain polymer solution into the circulating cooling water pipeline 6. The inlet of the circulating cooling water pipeline 6 is connected to a cooling water pump 7, and the outlet of the circulating cooling water pipeline 6 is connected to a corresponding cooling water user 8. The number of cooling water pumps 7 and the layout of the circulating cooling water pipeline 6 can be adjusted and designed according to actual situations. Figure 1 Only a schematic diagram is shown in the figure. Through the cooling water pump 7, the circulating cooling water (which can be fresh water) can be transported to the corresponding cooling water user 8. The used cooling water is then heat-exchanged and cooled with seawater through a cooler 10, and the cooled circulating cooling water is transported to the corresponding cooling water user 8 again by the cooling water pump 7, forming a closed cooling water circulation system.

[0040] At key structural parts of the circulating cooling water pipeline 6, corrosion damage sensors 2 can be installed to monitor corrosion damage in real time. Signals detected by the corrosion damage sensors 2 are transmitted to a signal processor 3 in real time for processing, obtaining the corrosion damage size value of the corresponding part, and then transmitted to a controller 4. The corrosion damage size value usually starts from 0.5 mm in depth and gradually increases. The diameter of the corroded part is between 3 mm and 5 mm.

[0041] When the controller 4 detects that the corrosion rate exceeds a certain value, it determines that the corrosion damage of the corresponding key structural part of the circulating cooling water pipeline 6 has intensified. The controller 4 sends an opening instruction to an electric valve 51, and the electric valve 51 opens. The long-chain polymer solution in the liquid storage tank 1 is injected into the circulating cooling water pipeline 6 through a filling pipeline 5. Figure 2 A relationship diagram between the long-chain polymer concentration and the corrosion rate in the circulating cooling water pipeline is shown. According to the test results, it can be seen that by injecting a certain concentration of long-chain polymer, the corrosion rate of the circulating cooling water pipeline can be significantly reduced, and after injecting to a certain concentration, the corrosion rate no longer increases, achieving effective inhibition of the corrosion damage of the circulating cooling water pipeline.

[0042] The circulating cooling water pipeline corrosion damage inhibition device provided in this embodiment monitors the corrosion rate of the circulating cooling water pipeline, and when the corrosion damage intensifies, it timely injects the long-chain polymer solution into the circulating cooling water pipeline. The long-chain polymer stabilizes the cooling water flow and reduces the friction resistance of the cooling water in the pipeline. This circulating cooling water pipeline corrosion damage inhibition device can achieve the inhibition treatment of the corrosion damage of the circulating cooling water pipeline, achieving the purpose of improving the reliability and safety of the circulating cooling water system.

[0043] Further, as Figure 3 shown, the corrosion damage sensor 2 is a guided wave sensor 21, and the signal processor 3 is a guided wave detector 31. The guided wave detector 31 is used to emit an excitation signal and excite ultrasonic guided waves on the circulating cooling water pipeline 6 through the guided wave sensor 21. The guided wave sensor 21 is used to collect the echo signal generated by the reflection of the ultrasonic guided wave at the corrosion damage and send the echo signal to the guided wave detector 31. The guided wave detector 31 obtains the corrosion damage size value on the circulating cooling water pipeline 6 based on the echo signal and sends the corrosion damage size value to the controller 4.

[0044] Specifically, the principle of guided wave corrosion damage detection is to generate elastic guided waves by exciting mechanical vibrations in the circulating cooling water pipeline 6. During the propagation of the guided waves in the circulating cooling water pipeline 6, when encountering the corrosion damage on the circulating cooling water pipeline 6, a part of the waves will be reflected back. When the reflected guided waves pass through the guided wave sensor 21, the magnetostrictive inverse effect occurs, generating an electrical signal in the guided wave sensor 21. The guided wave detector 31 collects, processes, and analyzes the signals generated in the guided wave sensor 21, and thus the detection of pipeline corrosion damage can be realized.

[0045] Furthermore, as Figure 3 shown, the guided wave sensor 21 includes a transmitting coil winding 211 and a receiving coil winding 212 wound around the circulating cooling water pipeline 6. The transmitting coil winding 211 and the receiving coil winding 212 can be wound around the pipeline in a strip shape, or a semi-circular housing can be directly buckled outside the pipeline. The guided wave sensor 21 integrates the functions of guided wave excitation and reception.

[0046] The guided wave detector 31 includes a transmitting module 311, a receiving module 312, and a processing module 313. The input end of the transmitting module 311 is electrically connected to the controller 4 to transmit an excitation signal under the instruction of the controller 4. The output end of the transmitting module 311 is electrically connected to the input end of the transmitting coil winding 211 to excite ultrasonic guided waves on the circulating cooling water pipeline 6 through the transmitting coil winding 211. The transmitting module 311 can emit excitation pulse signals. The output end of the receiving coil winding 212, the receiving module 312, the processing module 313, and the controller 4 are connected in sequence to convert the echo signal into an electrical signal and send it to the controller 4. The processing module 313 can filter, amplify, etc. the signals transmitted from the receiving module 312. By comparing and analyzing the characteristics of the transmitted pulse and the echo signal, the corrosion damage size value on the circulating cooling water pipeline 6 is obtained, and the corrosion damage size value is sent to the controller 4. More specifically, the guided wave sensor 21 and the guided wave detector 31 in this embodiment can be directly purchased from the market.

[0047] Further, as Figure 4 shown, the corrosion damage sensor 2 is a fiber Bragg grating sensor 22, and the signal processor 3 is an optical signal demodulator 32. The optical signal demodulator 32 is used to emit an optical signal. The optical signal is reflected back to the optical signal demodulator 32 by the fiber Bragg grating sensor 22. The optical signal demodulator 32 obtains the corrosion damage size value on the circulating cooling water pipeline 6 based on the reflected optical signal and sends the detected corrosion damage size value to the controller 4.

[0048] Specifically, the principle of fiber Bragg grating corrosion damage detection is that the corrosion damage and the size change of the corrosion damage on the circulating cooling water pipeline 6 cause the wavelength shift, phase change, polarization state change and intensity change of the reflection or transmission spectrum of the fiber Bragg grating sensor 22. By demodulating these spectral changes, the purpose of detecting the size value of the corrosion damage can be achieved.

[0049] Furthermore, as Figure 4 shown, multiple fiber Bragg grating sensors 22 are spacedly distributed on the same optical fiber 324. Each fiber Bragg grating sensor 22 corresponds to each detection point, and the coupling resonance center wavelengths of each fiber Bragg grating sensor 22 are different while the bandwidths are the same. The optical signal demodulator 32 includes a broadband light source 321, a coupler 322 and a demodulation module 323. The wavelength range of the broadband light source 321 matches that of the fiber Bragg grating sensor 22. The broadband light source 321, the coupler 322 and multiple fiber Bragg grating sensors 22 are connected in sequence, and the demodulation module 323 is connected to the coupler 322. In use, the broadband light source 321 emits optical signals containing various wavelengths, which enter the fiber Bragg grating sensor 22 through the coupler 322 and the optical fiber 324. Each fiber Bragg grating sensor 22 only reflects the light wave of its own central reflection wavelength. When the size of the corrosion damage changes near the detection point, the central reflection wavelength of the fiber Bragg grating sensor 22 corresponding to that place shifts. The reflected optical signal of the fiber Bragg grating sensor 22 enters the demodulation module 323 through the coupler 322 to obtain the corrosion damage size value. The demodulation module 323 can use a spectral analyzer or a wavelength encoding and demodulation, optoelectronic conversion system. The input end of the broadband light source 321 is electrically connected to the controller 4 to emit an optical signal under the instruction of the controller 4. The output end of the demodulation module 323 is electrically connected to the controller 4 to send the corrosion damage size value to the controller 4. The fiber Bragg grating sensor 22 and the optical signal demodulator 32 in this embodiment can be directly purchased from the market.

[0050] Further, it also includes a first flowmeter (not shown in the figure) installed on the circulating cooling water pipeline 6 and a second flowmeter (not shown in the figure) installed on the filling pipeline 5. Both the first flowmeter and the second flowmeter are electrically connected to the controller. The first flowmeter is used to detect the cooling water flow value, and the second flowmeter is used to detect the long-chain polymer solution flow value. By dividing the long-chain polymer solution flow value by the cooling water flow value, the long-chain polymer concentration value in the circulating cooling water pipeline 6 can be obtained, and then the opening of the electric valve 51 can be adjusted based on the measured concentration.

[0051] On the basis of the above embodiments, the long-chain polymer solution can be a polyacrylamide solution, a polyvinyl alcohol solution, a polyethylene glycol solution, a polyacrylic acid solution, or a polymethacrylic acid solution. A long-chain polymer, also known as a linear polymer compound, is mainly a polymer compound with a chain-like structure formed by the connection of many units of monomers. It can swell in a suitable solvent and dissolve, thereby increasing the flow stability of the cooling water. In this embodiment, a polyacrylamide solution is taken as an example for illustration. Polyacrylamide is a general term for homopolymers of acrylamide or polymers copolymerized with other monomers and belongs to water-soluble polymers, having good water solubility and high chemical activity. The aqueous solution of polyacrylamide has a relatively high viscosity, has good thickening, flocculation, and rheological regulation effects, and can reduce the deposition of dirt in the cooling water on the wall surface of the cooling water pipeline, and slow down the corrosion and scaling of the cooling water pipeline.

[0052] The embodiment of the present invention further provides a suppression method using the corrosion damage suppression device for a circulating cooling water pipeline as described above, including:

[0053] Step S10: The corrosion damage sensor 2 sends the detected corrosion damage size signal to the controller 4 after being processed by the signal processor 3. The controller 4 takes the first derivative of the corrosion damage size value with respect to time to obtain the measured corrosion rate value.

[0054] Step S20: When the measured corrosion rate value is greater than the preset corrosion rate value, the controller 4 sends an opening signal to the electric valve 51, and the long-chain polymer solution enters the circulating cooling water pipeline 6 through the filling pipeline 5. By opening the electric valve 51, the long-chain polymer solution can be injected into the circulating cooling water pipeline 6.

[0055] Step S30: When the measured corrosion rate value is less than or equal to the preset corrosion rate value, the controller sends a closing signal to the electric valve.

[0056] Further, after step S20 and before step S30, it further includes:

[0057] Step S21: The controller 4 obtains the long-chain polymer concentration value in the circulating cooling water pipeline based on the flow rate of the long-chain polymer solution and the flow rate of the cooling water.

[0058] Step S22: When the long-chain polymer concentration value in the circulating cooling water pipeline 6 is less than the preset concentration value and the concentration difference is greater than the preset concentration difference, the controller 4 sends an increased opening signal to the electric valve 51 to accelerate the injection speed; when the long-chain polymer concentration value in the circulating cooling water pipeline 6 is less than the preset concentration value and the concentration difference is less than or equal to the preset concentration difference, the controller 4 sends a decreased opening signal to the electric valve 51 to reduce the injection speed; when the long-chain polymer concentration value in the circulating cooling water pipeline 6 is greater than or equal to the preset concentration value, the controller 4 sends a closing signal to the electric valve 51 to stop the injection. By adjusting the opening of the electric valve 51 in combination with the magnitude of the long-chain polymer concentration value and the corrosion rate value, the long-chain polymer concentration value in the circulating cooling water pipeline 6 can be kept at the optimal concentration value (i.e., the critical point on the test curve) all the time, and the corrosion rate can be reduced as much as possible.

[0059] As can be seen from the above embodiments, for the circulating cooling water pipeline corrosion damage suppression device and suppression method provided by the present invention, the corrosion damage suppression device monitors the corrosion rate of the circulating cooling water pipeline, and when the corrosion damage expansion intensifies, it timely injects the long-chain polymer solution into the circulating cooling water pipeline, stabilizes the cooling water flow through the long-chain polymer, and reduces the friction resistance of the cooling water in the pipeline. The circulating cooling water pipeline corrosion damage suppression device can achieve the suppression treatment of the corrosion damage of the circulating cooling water pipeline, and achieve the purpose of improving the reliability and safety of the circulating cooling water system.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for inhibiting corrosion damage of a circulating cooling water pipeline, characterized in that, It includes a liquid storage tank, a corrosion damage detection mechanism and a controller. The liquid storage tank is filled with a long-chain polymer solution. The liquid storage tank is connected to a circulating cooling water pipeline through a filling pipeline, and an electric valve is installed on the filling pipeline; the corrosion damage detection mechanism includes a corrosion damage sensor and a signal processor. The corrosion damage sensor is installed on the circulating cooling water pipeline, and the signal processor is electrically connected to the corrosion damage sensor; both the signal processor and the electric valve are electrically connected to the controller; The corrosion damage sensor is a guided wave sensor, and the signal processor is a guided wave detector. The guided wave detector is used to emit an excitation signal and excite ultrasonic guided waves on the circulating cooling water pipeline through the guided wave sensor; the guided wave sensor is used to collect the echo signal generated by the reflection of the ultrasonic guided wave at the corrosion damage and send the echo signal to the guided wave detector; the guided wave detector obtains the corrosion damage size value on the circulating cooling water pipeline based on the echo signal and sends the corrosion damage size value to the controller; Alternatively, the corrosion damage sensor is a fiber Bragg grating sensor, and the signal processor is an optical signal demodulator; the optical signal demodulator is used to emit an optical signal, and the optical signal is reflected back to the optical signal demodulator through the fiber Bragg grating sensor. The optical signal demodulator obtains the corrosion damage size value on the circulating cooling water pipeline based on the reflected optical signal and sends the detected corrosion damage size value to the controller; The circulating cooling water pipeline corrosion damage suppression device monitors the corrosion rate of the circulating cooling water pipeline and timely fills the long-chain polymer solution into the circulating cooling water pipeline when the corrosion damage expands and intensifies. The long-chain polymer stabilizes the cooling water flow and reduces the friction resistance of the cooling water in the pipeline.

2. The corrosion damage suppression device for the circulating cooling water pipeline according to claim 1, wherein The guided wave sensor includes a transmitting coil winding and a receiving coil winding wound around the circulating cooling water pipeline. The guided wave detector includes a transmitting module, a receiving module and a processing module. The input end of the transmitting module is electrically connected to the controller, and the output end of the transmitting module is electrically connected to the input end of the transmitting coil winding to excite ultrasonic guided waves on the circulating cooling water pipeline through the transmitting coil winding; The output end of the receiving coil winding, the receiving module, the processing module and the controller are connected in sequence to convert the echo signal into an electrical signal and send it to the controller.

3. The corrosion damage suppression device for the circulating cooling water pipeline according to claim 1, wherein Multiple fiber Bragg grating sensors are spaced apart on the same optical fiber. The optical signal demodulator includes a broadband light source, a coupler and a demodulation module. The broadband light source, the coupler and multiple fiber Bragg grating sensors are connected in sequence, and the demodulation module is connected to the coupler; the input end of the broadband light source is electrically connected to the controller, and the output end of the demodulation module is electrically connected to the controller.

4. The corrosion damage suppression device for the circulating cooling water pipeline according to claim 1, characterized in that It further includes a first flowmeter installed on the circulating cooling water pipeline and a second flowmeter installed on the filling pipeline. Both the first flowmeter and the second flowmeter are electrically connected to the controller.

5. The corrosion damage suppression device for the circulating cooling water pipeline according to any one of claims 1 to 4, characterized in that, The long-chain polymer solution is a polyacrylamide solution, a polyvinyl alcohol solution, a polyethylene glycol solution, a polyacrylic acid solution or a polymethacrylic acid solution.

6. A suppression method using the corrosion damage suppression device for a circulating cooling water pipeline according to any one of claims 1 to 5, characterized in that, Including: The corrosion damage sensor sends the detected corrosion damage size signal to the controller after being processed by the signal processor. The controller takes the first derivative of the corrosion damage size value with respect to time to obtain the measured corrosion rate value; When the measured corrosion rate value is greater than the preset corrosion rate value, the controller sends an opening signal to the electric valve, and the long-chain polymer solution enters the circulating cooling water pipeline through the filling pipeline; When the measured corrosion rate value is less than or equal to the preset corrosion rate value, the controller sends a closing signal to the electric valve.

7. The suppression method according to claim 6, wherein After the long-chain polymer solution enters the circulating cooling water pipeline through the filling pipeline and before the controller sends a closing signal to the electric valve when the measured corrosion rate value is less than or equal to the preset corrosion rate value, it further includes: The controller obtains the long-chain polymer concentration value in the circulating cooling water pipeline based on the long-chain polymer solution flow rate and the cooling water flow rate; When the long-chain polymer concentration value in the circulating cooling water pipeline is less than the preset concentration value and the concentration difference is greater than the preset concentration difference, the controller sends an increased opening signal to the electric valve; when the long-chain polymer concentration value in the circulating cooling water pipeline is less than the preset concentration value and the concentration difference is less than or equal to the preset concentration difference, the controller sends a decreased opening signal to the electric valve; when the long-chain polymer concentration value in the circulating cooling water pipeline is greater than or equal to the preset concentration value, the controller sends a closing signal to the electric valve.

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