Distributed self-sensing electrochemical dechlorination device and method and protection system

Abstract

The invention relates to the technical field of reinforced concrete, and discloses a distributed self-sensing electrochemical dechlorination device which comprises an electrochemical dechlorination power supply, an anode unit, a cathode unit and a resistance measuring unit, the resistance measuring unit is used for monitoring the resistance between the anode unit and the cathode unit, and the relation between the chlorine ion content and the resistance is used for measuring the chlorine ion content. And the resistance measuring unit is in communication connection with the electrochemical dechlorination power supply, in practical application, the output voltage of the electrochemical dechlorination power supply is adjusted according to the dechlorination progress, the controllable degree of the electrochemical dechlorination process is improved, the dechlorination effect is enhanced, the dechlorination working efficiency is improved, and a powerful guarantee is provided for reinforced concrete protection. The invention also provides an electrochemical dechlorination method and a protection system.

Description

Technical Field

[0001] The present invention relates to the technical field of reinforced concrete repair, and in particular to a distributed self-sensing electrochemical dechlorination device and method and a protection system. Background Art

[0002] Concrete, a key building material, is widely used in critical projects such as nuclear power plants. In coastal environments, the humid and chloride-rich environment makes it easy for chloride ions to penetrate the concrete, damaging the passive film on the steel bars and accelerating corrosion, posing a significant safety hazard to the structure. Therefore, inhibiting chloride ion corrosion and promptly repairing damaged concrete structures are crucial tasks for ensuring the long-term stable operation of critical facilities such as nuclear power plants.

[0003] Electrochemical dechlorination is one of the common durability repair and protection technologies for concrete structures. Traditional electrochemical dechlorination technology is to apply a certain voltage to the concrete surface and use electrochemical reactions to promote the migration of chloride ions from the inside of the concrete to the surface, thereby achieving the removal of chloride ions. Existing electrochemical dechlorination devices usually use a fixed voltage for processing. The voltage distribution is uneven or the application time is inappropriate, which can easily lead to excessive dechlorination in local areas, causing damage to the concrete, or insufficient dechlorination to achieve the ideal anti-corrosion effect. In addition, the existing electrochemical dechlorination technology has weak real-time monitoring capabilities for the dechlorination process, and is unable to dynamically adjust the voltage distribution and application time, resulting in uneven dechlorination effects. It is difficult to ensure that the dechlorination process of the entire concrete structure can be effectively controlled, affecting the dechlorination effect. Summary of the Invention

[0004] The purpose of the present invention is to provide a distributed self-sensing electrochemical dechlorination device, method and protection system to solve the problems existing in the above-mentioned related technologies, enhance the dechlorination effect of concrete, reduce concrete damage, and provide protection for reinforced concrete.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a distributed self-sensing electrochemical dechlorination device, comprising:

[0007] An electrochemical dechlorination power supply, the electrochemical dechlorination power supply is used to provide a DC power supply;

[0008] an anode unit, the anode unit being disposed on the reinforced concrete and electrically connected to the electrochemical dechlorination power supply;

[0009] a cathode unit, the cathode unit being connected to the steel bars of the reinforced concrete and being electrically connected to the electrochemical dechlorination power supply;

[0010] A resistance measuring unit is provided. The anode unit and the cathode unit are both connected to the resistance measuring unit. The resistance measuring unit is capable of measuring the resistance between the anode unit and the cathode unit. The resistance measuring unit is in communication with the electrochemical dechlorination power supply.

[0011] Preferably, the cathode unit includes a plurality of dechlorination cathodes, each of which is connected to the steel bars, and the dechlorination cathodes are arranged in parallel and connected to the electrochemical dechlorination power supply.

[0012] Preferably, the chlorine removal cathodes are evenly distributed in an array.

[0013] Preferably, each of the steel bars is connected to a plurality of the chlorine removal cathodes.

[0014] Preferably, the chlorine removal cathode is connected to the axial end surface of the steel bar.

[0015] Preferably, the anode unit includes a plurality of dechlorination anodes, which are arranged on the surface of the concrete and correspond one-to-one to the dechlorination cathodes. The dechlorination anodes are arranged in parallel and connected to the electrochemical dechlorination power supply.

[0016] Preferably, the dechlorination cathode and the dechlorination anode are both connected to the resistance measuring unit.

[0017] The present invention also provides an electrochemical dechlorination method, which utilizes the above-mentioned distributed self-sensing electrochemical dechlorination device and includes the following steps:

[0018] The output voltage of the electrochemical dechlorination power supply is adjusted according to the resistance value between the anode unit and the cathode unit measured by the resistance measuring unit.

[0019] Preferably, the relationship between the electrical resistance of reinforced concrete and the progress and speed of chlorine removal is obtained through experiments;

[0020] The output voltage of the electrochemical dechlorination power supply is adjusted according to the resistance value between the anode unit and the cathode unit measured by the resistance measuring unit.

[0021] The present invention also provides a protection system, comprising the above-mentioned distributed self-sensing electrochemical dechlorination device.

[0022] Compared with the related art, the present invention has achieved the following technical effects: the distributed self-sensing electrochemical dechlorination device of the present invention includes an electrochemical dechlorination power supply, an anode unit, a cathode unit and a resistance measuring unit, wherein the electrochemical dechlorination power supply is used to provide a DC power supply; the anode unit is arranged on the concrete of the reinforced concrete and is electrically connected to the electrochemical dechlorination power supply; the cathode unit is connected to the steel bars of the reinforced concrete and is electrically connected to the electrochemical dechlorination power supply; the anode unit and the cathode unit are both connected to the resistance measuring unit, the resistance measuring unit can measure the resistance between the anode unit and the cathode unit, and the resistance measuring unit is communicatively connected to the electrochemical dechlorination power supply.

[0023] The distributed self-sensing electrochemical dechlorination device of the present invention provides a DC power supply for the anode unit and the cathode unit. The anode unit is installed on the concrete of the reinforced concrete, and the cathode unit is connected to the steel bars of the reinforced concrete, forming a DC electric field from the anode to the cathode within the reinforced concrete. Under the action of the electric field, water molecules in the concrete of the cathode unit area undergo an electrolytic reaction, generating a large number of hydroxide ions, causing the pH value of the environment surrounding the steel bars to rise, thereby promoting the re-formation of a passivation film on the surface of the steel bars. As the electrolytic reaction continues, the chloride ion concentration near the cathode unit rapidly drops below a critical value. At the same time, the chloride ions are oxidized to chlorine gas and escape from the concrete interior, achieving the purpose of dechlorination. The present invention uses a resistance measurement unit to monitor the resistance between the anode unit and the cathode unit. The relationship between the chloride ion content and the resistance is used to obtain the real-time dechlorination progress. The resistance measurement unit is communicatively connected to the electrochemical dechlorination power supply. In actual application, the output voltage of the electrochemical dechlorination power supply is adjusted according to the dechlorination progress, improving the controllability of the electrochemical dechlorination process, enhancing the dechlorination effect, and improving the dechlorination efficiency, providing a strong guarantee for the protection of reinforced concrete.

[0024] The present invention also provides an electrochemical dechlorination method, utilizing the above-mentioned distributed self-sensing electrochemical dechlorination device; the present invention also provides a protection system, including the above-mentioned distributed self-sensing electrochemical dechlorination device; naturally, the electrochemical dechlorination method and protection system of the present invention can achieve the above-mentioned beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is a schematic structural diagram of a distributed self-sensing electrochemical dechlorination device disclosed in an embodiment of the present invention;

[0027] Figure 2 This is a partial structural diagram of the distributed self-sensing electrochemical dechlorination device disclosed in an embodiment of the present invention.

[0028] In the figure: 1. Electrochemical dechlorination power supply; 2. Anode unit; 3. Cathode unit; 4. Resistance measurement unit; 5. Dechlorination cathode; 6. Dechlorination anode; 7. Steel bars. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] The purpose of the present invention is to provide a distributed self-sensing electrochemical dechlorination device, method and protection system to solve the problems existing in the above-mentioned related technologies, enhance the dechlorination effect of concrete, reduce concrete damage, and provide protection for reinforced concrete.

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Example 1

[0033] This embodiment provides a distributed self-sensing electrochemical dechlorination device, please refer to Figure 1-Figure 2 , including an electrochemical dechlorination power supply 1, an anode unit 2, a cathode unit 3 and a resistance measuring unit 4, wherein the electrochemical dechlorination power supply 1 is used to provide a DC power supply; the anode unit 2 is arranged on the concrete of the reinforced concrete and is electrically connected to the electrochemical dechlorination power supply 1; the cathode unit 3 is connected to the steel bars 7 of the reinforced concrete and is electrically connected to the electrochemical dechlorination power supply 1; the anode unit 2 and the cathode unit 3 are both connected to the resistance measuring unit 4, the resistance measuring unit 4 can measure the resistance between the anode unit 2 and the cathode unit 3, and the resistance measuring unit 4 is communicatively connected to the electrochemical dechlorination power supply 1.

[0034] In the distributed self-sensing electrochemical dechlorination device of the present invention, the electrochemical dechlorination power supply 1 provides a DC power supply for the anode unit 2 and the cathode unit 3. The anode unit 2 is set on the concrete of the reinforced concrete, and the cathode unit 3 is connected to the steel bars 7 of the reinforced concrete, forming a DC electric field from the anode to the cathode inside the reinforced concrete. Under the action of the electric field, the water molecules inside the concrete in the area of the cathode unit 3 undergo an electrolytic reaction, generating a large number of hydroxide ions, causing the pH value of the environment around the steel bars 7 to rise, thereby promoting the re-formation of a passivation film on the surface of the steel bars 7. As the electrolytic reaction continues, the chloride ion concentration near the cathode unit 3 rapidly drops below the critical value. At the same time, the chloride ions are oxidized into chlorine gas and escape from the interior of the concrete, achieving the purpose of dechlorination. The present invention utilizes a resistance measuring unit 4 to monitor the resistance between the anode unit 2 and the cathode unit 3, and utilizes the relationship between the chloride ion content and the resistance to obtain real-time dechlorination progress. The resistance measuring unit 4 is communicatively connected to the electrochemical dechlorination power supply 1. In practical applications, the output voltage of the electrochemical dechlorination power supply 1 is adjusted according to the dechlorination progress, thereby improving the controllability of the electrochemical dechlorination process, enhancing the dechlorination effect, and improving the dechlorination work efficiency, thereby providing a strong guarantee for reinforced concrete protection.

[0035] Specifically, the cathode unit 3 includes multiple dechlorination cathodes 5, each of which is connected to a steel bar 7. The dechlorination cathodes 5 are arranged in parallel and connected to the electrochemical dechlorination power supply 1. The cathode unit 3 adopts a distributed structure, including multiple dechlorination cathodes 5. The resistance between the cathode and anode in different areas can be measured, thereby obtaining the real-time dechlorination progress of different areas. This facilitates the adjustment of the output voltage of the electrochemical dechlorination power supply 1 according to the dechlorination progress, which is conducive to achieving the optimal dechlorination setting, improving the dechlorination efficiency, enhancing the dechlorination effect, saving energy, and improving the flexibility and adaptability of the device.

[0036] In other specific embodiments of the present invention, the chlorine removal cathodes 5 are evenly distributed in an array, such as a circular array or a rectangular array. The equally spaced arrangement further improves the chlorine removal effect and facilitates adjustment of the output voltage of the electrochemical chlorine removal power supply 1. In actual applications, the distribution of the chlorine removal cathodes 5 can be appropriately selected based on specific operating conditions such as the type, specification, and distribution of the steel bars 7, thereby improving the flexibility and adaptability of the device.

[0037] In a specific embodiment of the present invention, each steel bar 7 can be connected to multiple dechlorination cathodes 5. The dechlorination cathodes 5 can be arranged around the steel bar 7 or along the length of the steel bar 7 to achieve dechlorination in different areas and improve the dechlorination efficiency.

[0038] In this specific embodiment, the dechlorination cathode 5 is connected to the axial end face of the steel bar 7, and the connection is firm and easy to operate. The steel bar 7 is connected to the dechlorination cathode 5 to construct the cathode of the electrolytic reaction. The water molecules in the cathode area will undergo electrolytic reaction, generating a large amount of hydroxide ions, causing the pH value of the environment around the steel bar 7 to rise significantly, thereby prompting the steel bar 7 surface to re-form a passivation film. As the reaction continues, the chloride ion concentration near the cathode rapidly drops below the critical value. At the same time, the chloride ions are oxidized to chlorine and escape from the inside of the concrete, completing the dechlorination process and realizing the repair and protection of reinforced concrete. In other specific embodiments that can be implemented by the present invention, the dechlorination cathode 5 can also be connected to the outer peripheral surface of the steel bar 7 to meet the different needs of the distributed layout of the cathode unit 3. By measuring the resistance between the anode unit 2 and the distributed dechlorination cathode 5 in different areas, the numerical relationship between the chloride ion content and the resistance value can be used to obtain real-time dechlorination progress. Different voltage values can be applied to different areas of the concrete, avoiding the use of a unified voltage value for concrete with different chloride ion contents, resulting in an inconsistent dechlorination process.

[0039] Accordingly, the anode unit 2 includes multiple dechlorination anodes 6, which are positioned on the surface of the concrete and correspond one-to-one with the dechlorination cathodes 5. The dechlorination anodes 6 are arranged in parallel and connected to the electrochemical dechlorination power supply 1. The anode unit 2 is also distributed, with multiple dechlorination anodes 6 arranged on the surface of the concrete and aligned with the positions of the dechlorination cathodes 5. This allows for measurement of the resistance between the dechlorination anodes 6 and the dechlorination cathodes 5 in different regions. Based on the measured resistance between the dechlorination anodes 6 and the dechlorination cathodes 5 in different regions, the numerical relationship between chloride ion content and resistance value can be used to determine real-time dechlorination progress.

[0040] In actual applications, the dechlorination cathode 5 and the dechlorination anode 6 are both connected to the resistance measuring unit 4, which facilitates the measurement of the resistance between the dechlorination anode 6 and the dechlorination cathode 5 in different areas and improves the working reliability of the device. When a dechlorination anode 6 or dechlorination cathode 5 is damaged, it will not affect the normal operation of other dechlorination anodes 6 and dechlorination cathodes 5, thereby ensuring the normal progress of the electrochemical dechlorination process.

[0041] In the distributed, self-sensing electrochemical dechlorination device of the present invention, an electrochemical dechlorination power supply 1 provides DC power to anode units 2 and cathode units 3, promoting the migration of chloride ions from the concrete interior to the surface. Both anode units 2 and cathode units 3 employ a distributed structure, with multiple groups of dechlorination anodes 6 and cathodes 5 provided to achieve self-sensing of the dechlorination process. By measuring the resistance between dechlorination anodes 6 and cathodes 5 distributed in different areas and utilizing the numerical relationship between chloride ion content and resistance, real-time dechlorination progress can be determined, enabling real-time monitoring of chloride ion traction.

[0042] At the same time, the present invention utilizes distributed dechlorination anodes 6 and dechlorination cathodes 5 to achieve distributed voltage application, and based on the monitored resistance value between the dechlorination anodes 6 and the dechlorination cathodes 5, monitors the progress of chloride ion migration, and dynamically optimizes the voltage distribution according to the progress of chloride ion migration, so that different areas of nuclear power concrete can have different voltage values, avoiding the use of a uniform voltage value for concrete with different chloride ion contents, resulting in an uneven dechlorination process, thereby ensuring a uniform dechlorination process, avoiding local over-dechlorination or insufficient dechlorination, thereby enhancing the dechlorination effect and reducing concrete damage, and improving the working reliability of the device. The resistance measurement unit 4 is communicatively connected to the electrochemical dechlorination power supply 1, which is conducive to achieving precise control and reducing manual intervention.

[0043] It should be explained here that the dechlorination anode 6 of the present invention corresponds to the dechlorination cathode 5 one-to-one. When the electrochemical dechlorination power supply 1 is connected, the dechlorination anode 6 is electrically connected to the positive electrode of the electrochemical dechlorination power supply 1, and the dechlorination cathode 5 is electrically connected to the negative electrode of the electrochemical dechlorination power supply 1. At the same time, the dechlorination cathode 5 is connected to the steel bar 7 to form a negative electrode, thereby forming a DC electric field from the dechlorination anode 6 to the cathode. In addition, in actual applications, a controller can be provided to achieve communication connection between the resistance measuring unit 4 and the electrochemical dechlorination power supply 1, and according to the resistance between the dechlorination anode 6 and the dechlorination cathode 5 measured by the resistance measuring unit 4, the output voltage of the electrochemical dechlorination power supply 1 is adjusted to achieve the optimal dechlorination speed setting; wherein, the structure and working principle of the controller are conventional means of those skilled in the art and will not be repeated here.

[0044] Compared to existing electrochemical dechlorination technologies, the distributed, self-sensing electrochemical dechlorination device of the present invention utilizes distributed voltage application and resistance self-sensing, which, to a certain extent, prevents excessive or short local dechlorination processes, which can lead to concrete damage or poor dechlorination results. This improves the precision and intelligence of nuclear power concrete dechlorination. The distributed, self-sensing electrochemical dechlorination device of the present invention is not only applicable to the nuclear power industry but can also be applied to the concrete corrosion protection of other important structures.

[0045] Example 2

[0046] This embodiment provides an electrochemical dechlorination method, using the distributed self-sensing electrochemical dechlorination device of embodiment 1, including the following steps:

[0047] The output voltage of the electrochemical dechlorination power supply 1 is adjusted according to the resistance value between the anode unit 2 and the cathode unit 3 measured by the resistance measuring unit 4 .

[0048] The electrochemical dechlorination method of the present invention utilizes the resistance measuring unit 4 to monitor the resistance between the anode unit 2 and the cathode unit 3 to obtain real-time dechlorination progress, and adjusts the output voltage of the electrochemical dechlorination power supply 1 according to the dechlorination progress, which is beneficial to improving the uniformity of the dechlorination process in different areas.

[0049] In this embodiment, the relationship between the electrical resistance of reinforced concrete and the progress and speed of chlorine removal is determined through experiments, thereby achieving the purpose of obtaining real-time chlorine removal progress by monitoring the resistance between the anode unit 2 and the cathode unit 3 using the resistance measurement unit 4. The output voltage of the electrochemical chlorine removal power supply 1 is then adjusted based on the resistance value between the anode unit 2 and the cathode unit 3 measured by the resistance measurement unit 4.

[0050] It should also be noted here that, in practical applications, a deep learning algorithm can be used to calculate the optimal dechlorination speed setting scheme to adjust the supply voltage of the electrochemical dechlorination power supply 1. The deep learning algorithm is a machine learning algorithm based on an artificial neural network, which is a common method used by those skilled in the art and will not be described in detail here.

[0051] The electrochemical dechlorination method of the present invention measures the resistance between the dechlorination anode 6 and the dechlorination cathode 5 distributed in different areas, and utilizes the numerical relationship between the chloride ion content and the resistance value to obtain real-time dechlorination progress; the distributed voltage arrangement allows different areas of nuclear power concrete to have different voltage values, avoiding the use of a uniform voltage value for concrete with different chloride ion contents, resulting in an inconsistent dechlorination process. At the same time, the present invention can dynamically adjust the distributed voltage according to the dechlorination process. Based on the communication connection between the electrochemical dechlorination power supply 1 and the resistance measurement unit 4, the output voltage of the electrochemical dechlorination power supply 1 can be dynamically adjusted depending on the dechlorination progress to achieve the optimal dechlorination speed arrangement.

[0052] Example 3

[0053] This embodiment provides a protection system, including the distributed self-sensing electrochemical chlorine removal device of embodiment one.

[0054] The protection system of this embodiment utilizes the aforementioned distributed, self-sensing electrochemical dechlorination device. During the electrochemical dechlorination process, water molecules in the area of cathode unit 3 undergo an electrolytic reaction, generating a large number of hydroxide ions. This significantly increases the pH value of the environment surrounding rebar 7, thereby prompting the re-formation of a passivation film on the surface of rebar 7. As the reaction continues, the chloride ion concentration near cathode unit 3 rapidly drops below a critical value. Simultaneously, the chloride ions are oxidized to chlorine gas and escape from the concrete, achieving both protection and repair purposes.

[0055] The protection system of this embodiment may also include an anti-corrosion coating device, a humidity and temperature monitoring device, etc., to ensure the reliability of the protection system. The anti-corrosion coating device and the humidity and temperature monitoring device are conventional means used by those skilled in the art and will not be described in detail here.

[0056] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A distributed self-sensing electrochemical dechlorination device, characterized in that: include: An electrochemical dechlorination power supply, the electrochemical dechlorination power supply is used to provide a DC power supply; an anode unit, the anode unit being disposed on the reinforced concrete and electrically connected to the electrochemical dechlorination power supply; a cathode unit, the cathode unit being connected to the steel bars of the reinforced concrete and being electrically connected to the electrochemical dechlorination power supply; A resistance measuring unit is provided. The anode unit and the cathode unit are both connected to the resistance measuring unit. The resistance measuring unit is capable of measuring the resistance between the anode unit and the cathode unit. The resistance measuring unit is in communication with the electrochemical dechlorination power supply.

2. The distributed self-sensing electrochemical dechlorination device according to claim 1 is characterized in that: The cathode unit includes a plurality of dechlorination cathodes, each of which is connected to the steel bars. The dechlorination cathodes are arranged in parallel and connected to the electrochemical dechlorination power supply.

3. The distributed self-sensing electrochemical dechlorination device according to claim 2 is characterized in that: The chlorine removal cathodes are evenly distributed in an array.

4. The distributed self-sensing electrochemical dechlorination device according to claim 2, characterized in that: Each of the steel bars is connected to a plurality of the chlorine removal cathodes.

5. The distributed self-sensing electrochemical dechlorination device according to claim 2, characterized in that: The chlorine removal cathode is connected to the axial end surface of the steel bar.

6. The distributed self-sensing electrochemical dechlorination device according to claim 2, characterized in that: The anode unit includes a plurality of dechlorination anodes, which are arranged on the surface of the concrete and correspond one to one with the dechlorination cathodes. The dechlorination anodes are arranged in parallel and connected to the electrochemical dechlorination power supply.

7. The distributed self-sensing electrochemical dechlorination device according to claim 6, characterized in that: The dechlorination cathode and the dechlorination anode are both connected to the resistance measuring unit.

8. An electrochemical dechlorination method, characterized in that: The distributed self-sensing electrochemical dechlorination device according to any one of claims 1 to 7 comprises the following steps: The output voltage of the electrochemical dechlorination power supply is adjusted according to the resistance value between the anode unit and the cathode unit measured by the resistance measuring unit.

9. The electrochemical dechlorination method according to claim 8, characterized in that: The relationship between the electrical resistance of reinforced concrete and the progress and speed of chlorine removal was obtained through experiments. The output voltage of the electrochemical dechlorination power supply is adjusted according to the resistance value between the anode unit and the cathode unit measured by the resistance measuring unit.

10. A protection system, characterized in that: It includes the distributed self-sensing electrochemical dechlorination device described in any one of claims 1-7.

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