Method and system for determining anode laydown for a cathodic protection system

Abstract

The application discloses a method and system for determining an anode laying mode of a cathodic protection system, and relates to the technical field of anode laying of the cathodic protection system. The method comprises the following steps: determining a corrosion medium according to the soil in the area where the earth-covered storage tank is located, adopting the same material as that of the earth-covered storage tank as a cathode electrode, and performing electrochemical test to obtain electrochemical parameters of the cathode electrode; constructing three-dimensional models of the earth-covered storage tank and linear anodes in a three-dimensional modeling software; laying the linear anode three-dimensional model on the earth-covered storage tank three-dimensional model according to each preset anode laying mode to obtain an earth-covered storage tank cathodic protection system three-dimensional model corresponding to each preset anode laying mode; importing the system three-dimensional model into finite element calculation software, performing simulation according to the electrochemical parameters to obtain simulation results of each preset anode laying mode; and determining an optimal anode laying mode according to the simulation results. The application can determine the optimal anode laying mode for the earth-covered storage tank cathodic protection system to realize protection of the earth-covered storage tank.

Description

Technical Field

[0001] This invention relates to the field of anode laying technology for cathodic protection systems, and in particular to a method and system for determining the anode laying method of a cathodic protection system. Background Technology

[0002] Soil-covered storage tanks operate in soil environments for extended periods, and are susceptible to corrosion, perforation, and even leakage due to external soil characteristics and topographic settlement. In actual production, polymer coatings are typically used to isolate the metal from the electrolyte environment. However, over time, these coatings may be damaged by impacts or penetration, ultimately leading to corrosion. Therefore, a combined protection system of coating and impressed current cathodic protection can be used for the exterior of the storage tank. The cathodic protection system uses an external current source (usually a rectifier) ​​to generate direct current. This current source is connected to anodes made of inert materials, polarizing the metal surface into a cathodic potential region, thereby protecting the storage tank. Since the anode placement method of the cathodic protection system requires certain systematic verification, which cannot currently be accelerated through actual components, there is an urgent need for an anode placement method for cathodic protection systems of soil-covered storage tanks. Summary of the Invention

[0003] The purpose of this invention is to provide a method and system for determining the anode laying method of a cathodic protection system, which can determine the optimal anode laying method for a cathodic protection system for a soil-covered storage tank to achieve protection of the soil-covered storage tank.

[0004] To achieve the above objectives, the present invention provides the following solution:

[0005] A method for determining the anode laying pattern of a cathodic protection system, used in a cathodic protection system for a soil-covered storage tank, the method comprising:

[0006] The corrosive medium is determined based on the soil in the area where the soil-covered storage tank is located. A material identical to that of the soil-covered storage tank is used as the cathode electrode, and electrochemical tests are conducted to obtain the electrochemical parameters of the cathode electrode. The electrochemical parameters include exchange current density, polarization curve slope, and equilibrium potential.

[0007] In 3D modeling software, construct 3D models of the soil-covered storage tank and the linear anode based on the actual dimensions of the soil-covered storage tank and the actual dimensions of the linear anode.

[0008] According to each preset anode laying method, the linear anode three-dimensional model is laid on the soil-covered storage tank three-dimensional model to obtain the soil-covered storage tank cathodic protection system three-dimensional model corresponding to each preset anode laying method;

[0009] For any preset anode laying method, the three-dimensional model of the cathodic protection system of the soil-covered storage tank corresponding to the preset anode laying method is imported into the finite element calculation software and the simulation results corresponding to the preset anode laying method are obtained by performing simulation based on the electrochemical parameters.

[0010] The optimal anode laying method is determined based on the simulation results corresponding to each preset anode laying method.

[0011] Optionally, the 3D modeling software is SolidWords software.

[0012] Optionally, the finite element calculation software is Comsol software.

[0013] Optionally, for any preset anode laying method, the three-dimensional model of the cathodic protection system of the soil-covered storage tank corresponding to the preset anode laying method is imported into finite element calculation software to perform simulation based on the electrochemical parameters, and the simulation results corresponding to the preset anode laying method are obtained, specifically including:

[0014] For any preset anode laying method, import the three-dimensional model of the cathodic protection system of the soil-covered storage tank corresponding to the preset anode laying method into the finite element calculation software;

[0015] An electrolyte region is set in the finite element calculation software;

[0016] The three-dimensional model of the cathodic protection system of the soil-covered storage tank corresponding to the preset anode laying method is placed in the electrolyte region, and a reference electrode is set on the three-dimensional model of the cathodic protection system of the soil-covered storage tank corresponding to the preset anode laying method to obtain a finite element calculation model;

[0017] Based on the electrochemical parameters, the finite element model is sequentially subjected to boundary setting operations, secondary current distribution operations, mesh generation operations, and calculation operations to obtain the simulation results corresponding to the preset anode laying method.

[0018] A system for determining the anode laying pattern in a cathodic protection system is used in a cathodic protection system for a soil-covered storage tank. The anode laying pattern determination system includes:

[0019] The electrochemical parameter determination module is used to determine the corrosive medium based on the soil in the area where the soil-covered storage tank is located, and to use the same material as the soil-covered storage tank as the cathode electrode to conduct electrochemical tests to obtain the electrochemical parameters of the cathode electrode; the electrochemical parameters include exchange current density, polarization curve slope and equilibrium potential.

[0020] The 3D modeling module is used to construct 3D models of the covered storage tank and the linear anode in 3D modeling software based on the actual dimensions of the covered storage tank and the linear anode.

[0021] The three-dimensional modeling module for the cathodic protection system of the soil-covered storage tank is used to lay the three-dimensional model of the linear anode on the three-dimensional model of the soil-covered storage tank according to each preset anode laying method to obtain the three-dimensional model of the cathodic protection system of the soil-covered storage tank corresponding to each preset anode laying method.

[0022] The simulation module is used to import the three-dimensional model of the cathodic protection system of the soil-covered storage tank corresponding to any preset anode laying method into the finite element calculation software and perform simulation based on the electrochemical parameters to obtain the simulation results corresponding to the preset anode laying method.

[0023] The optimal anode laying method determination module is used to determine the optimal anode laying method based on the simulation results corresponding to each preset anode laying method.

[0024] Optionally, the 3D modeling software is SolidWords software.

[0025] Optionally, the finite element calculation software is Comsol software.

[0026] Optionally, the simulation module specifically includes:

[0027] The model import unit is used to import the three-dimensional model of the cathodic protection system of the soil-covered storage tank corresponding to any preset anode laying method into the finite element calculation software.

[0028] An electrolyte region addition unit is used to set the electrolyte region in the finite element calculation software;

[0029] The finite element calculation model determination unit is used to place the three-dimensional model of the cathodic protection system of the soil-covered storage tank corresponding to the preset anode laying method in the electrolyte region, and to set a reference electrode on the three-dimensional model of the cathodic protection system of the soil-covered storage tank corresponding to the preset anode laying method to obtain the finite element calculation model.

[0030] The simulation operation unit is used to perform boundary setting operations, secondary current distribution operations, mesh generation operations, and calculation operations on the finite element model according to the electrochemical parameters to obtain the simulation results corresponding to the preset anode laying method.

[0031] According to specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0032] This invention establishes a three-dimensional model of the cathodic protection system for soil-covered storage tanks based on finite element calculation software, uses a corrosion module to simulate the corrosion environment of the soil-covered storage tanks under actual service conditions, analyzes the influence of different anode laying methods on the protection potential distribution in the applied cathodic protection system, and thus obtains the optimal anode laying method. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a flowchart of the method for determining the anode laying method provided in an embodiment of the present invention;

[0035] Figure 2 A diagram showing the arrangement of the linear anode and reference electrode provided in an embodiment of the present invention;

[0036] Figure 3 for Figure 2 Cross-sectional view in the BB direction.

[0037] Symbol explanation:

[0038] Soil-covered storage tank-1, reference electrode-2, linear anode-3. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] like Figure 1 As shown, this embodiment of the invention provides a method for determining the anode laying method of a cathodic protection system, used in a cathodic protection system for a soil-covered storage tank. The method includes:

[0042] Step 101: Determine the corrosive medium based on the soil in the area where the soil-covered storage tank 1 is located. Use the same material as the soil-covered storage tank 1 as the cathode electrode and perform electrochemical tests to obtain the electrochemical parameters of the cathode electrode. The electrochemical parameters include exchange current density, polarization curve slope, and equilibrium potential.

[0043] Step 102: Construct a 3D model of the soil-covered storage tank 1 and a 3D model of the linear anode 3 in the 3D modeling software based on the actual dimensions of the soil-covered storage tank 1 and the actual dimensions of the linear anode 3.

[0044] Step 103: Lay the linear anode 3D model on the soil-covered storage tank 3D model according to each preset anode laying method to obtain the soil-covered storage tank cathodic protection system 3D model corresponding to each preset anode laying method.

[0045] Step 104: For any preset anode laying method, import the three-dimensional model of the cathodic protection system of the soil-covered storage tank corresponding to the preset anode laying method into the finite element calculation software and perform simulation according to the electrochemical parameters to obtain the simulation results corresponding to the preset anode laying method.

[0046] Step 105: Determine the optimal anode laying method based on the simulation results corresponding to each preset anode laying method.

[0047] In practical applications, the 3D modeling software is SolidWords.

[0048] In practical applications, the finite element calculation software is Comsol software.

[0049] In practical applications, for any preset anode laying method, the three-dimensional model of the cathodic protection system of the soil-covered storage tank corresponding to the preset anode laying method is imported into finite element calculation software to perform simulation based on the electrochemical parameters, and the simulation results corresponding to the preset anode laying method are obtained, specifically including:

[0050] For any preset anode laying method, import the three-dimensional model of the cathodic protection system of the soil-covered storage tank corresponding to the preset anode laying method into the finite element calculation software.

[0051] An electrolyte region is set in the finite element calculation software.

[0052] The three-dimensional model of the cathodic protection system of the soil-covered storage tank corresponding to the preset anode laying method is placed in the electrolyte region, and a reference electrode 2 is set on the three-dimensional model of the cathodic protection system of the soil-covered storage tank corresponding to the preset anode laying method to obtain a finite element calculation model.

[0053] Based on the electrochemical parameters, the finite element model is sequentially subjected to boundary setting operations, secondary current distribution operations, mesh generation operations, and calculation operations to obtain the simulation results corresponding to the preset anode laying method.

[0054] The method for determining the anode laying method of the cathodic protection system provided by this invention simulates the performance of the impressed current cathodic protection system installed in actual engineering. With the help of this method, a reasonable anode laying method can be designed, thereby providing a reference for the design and optimization of the cathodic protection system on the outer wall of the soil-covered storage tank 1.

[0055] This invention provides a more specific embodiment of the method for determining the above-mentioned anode laying method, which is described in detail below, specifically including:

[0056] S1. Obtain electrochemical parameters.

[0057] Steel used in the soil-covered storage tank 1 was cut as an electrochemical sample (the steel was processed into small pieces of 10mm*2mm*2mm as electrochemical samples). After wire cutting, epoxy resin was cold-mounted as the working electrode for electrochemical experiments. The experimental environment was a simulated solution prepared according to the soil properties of the service environment as the electrolyte for electrochemical experiments. Electrochemical parameters such as exchange current density, polarization curve slope, and equilibrium potential were obtained.

[0058] In practical applications, in S1, soil near the covered storage tank 1 is selected as the corrosive medium. Soil samples are taken from the corrosion environment workstation (soil sampling depth is fixed at 30cm), and multiple samples are mixed (soil sampling points are taken in an equilateral triangle (side length 60cm), and the samples are mixed three times to obtain the final soil sample). After drying, the samples are placed in an ion chromatograph to analyze the chemical composition and physicochemical properties such as pH. (Large stones in the soil are removed, and the soil is placed in an electric thermostatic drying oven at a constant temperature of 105℃ for 8 hours. After being taken out, crushed, and placed in an ion chromatograph to analyze the chemical composition and physicochemical properties such as pH). Based on the obtained data, a simulated soil solution is prepared using analytical chemical reagents and deionized water to simulate the service environment. Finally, repeated experiments are conducted to obtain electrochemical parameters such as exchange current density, polarization curve slope, and equilibrium potential.

[0059] S2. Establish a finite element calculation model.

[0060] S2 specifically includes the following steps:

[0061] S2.1. A 3D model of the impressed current cathodic protection system for a horizontal storage tank, i.e., a 3D model of the cathodic protection system for a soil-covered storage tank, is established using SolidWords 3D modeling software. The model includes a horizontal storage tank model and linear anode models laid around the tank. Due to the inherent symmetry of the 3D model, it is sectioned, and half of the model is used for analysis. The 3D model is based on the drawings of the actual working conditions. The linear anode 3 is 400-600mm away from the tank body. The linear anode models laid around the tank have various different linear anode laying methods.

[0062] S2.2. Import the processed 3D model of the impressed current cathodic protection system of the horizontal storage tank (the horizontal storage tank model and the linear anode model laid around the tank) into the finite element calculation software Comsol (select CAD document in geometry import, select independent objects, import all entities and surfaces, set the import tolerance to 1E-5, and select automatic checking and repair of imported object errors). After importing the model, enter the Comsol geometry editing interface, add a cuboid as the electrolyte region, align the left face of the cuboid with the cutting plane, and ensure that the imported 3D model is completely within the cuboid; select the cutting plane as the working plane, and add the corresponding number of circles according to the location of the reference electrode 2 in the actual working conditions, such as... Figure 2 and Figure 3 As shown; finally, the imported 3D model and geometric parts such as cuboids are combined to obtain the finite element calculation model.

[0063] S3, Boundary Settings.

[0064] S3 includes the following steps:

[0065] S3.1 Add explicit elements to the components. In the model that makes up the consortium, group and name the boundaries of the outer shell of the tank and the geometric entity layer to which the linear anode belongs.

[0066] S3.2, Adding Materials. Select appropriate steel materials for storage tanks, and add the electrochemical parameters of exchange current density, polarization curve slope, and equilibrium potential obtained from S1 to the material properties.

[0067] S3.3 Add multiphysics. Set geometric deformation (select the tank as the deformable boundary and the rest as the non-deformable boundary).

[0068] S4. Add secondary current distribution, set the region, and select the required control equation. Specifically, enable cathodic protection features, add interfaces for electrolyte, initial value, electrode surface, applied current surface, reference electrode 2, and wireless electrolyte, and set their respective regions and parameters.

[0069] S4 includes the following steps:

[0070] S4.1 Add electrolyte interface. The electrolyte region is selected as a cuboid region, with an electrolyte conductivity of 0.8 S / m. Assuming there is no concentration gradient in the solution, the solution is electrically neutral, and there is no flow, the control equation for controlling the electrolyte region to meet these assumptions is:

[0071]

[0072] The electrolyte interface is added by controlling the electrolyte region using this governing equation, where, It is the gradient operator, φl The electrolyte potential is (V).

[0073] S4.2 Add an initial value interface. Set the electrolyte potential and charge to 0.

[0074] S4.3 Add an electrode surface interface and select the corresponding area. Enable the dissolution-deposition function, select the governing equation to control the electrode surface; select the governing equation for the anodic reaction and set the corresponding electrochemical parameters.

[0075] S4.3 includes the following steps:

[0076] S4.3.1 Add electrode surface interfaces, selecting the grouped tank area. Enable the dissolution-deposition function. Since the dissolution reaction mainly occurs on the tank's metal surface, the governing equation is selected as follows:

[0077]

[0078] In the formula, C R The value represents the dissolution rate of the anode element, M is the molar mass of the anode element dissolved; F is the Faraday constant; ρ is the density of the anode element dissolved; and z is the charge number of the anode.

[0079] In the dissolution-deposition module, Fe, the anolyte element, is added with a stoichiometric coefficient of 2, and the stoichiometric coefficient of the dissolution-deposition material is set to 1. This is used to simulate the chemical equations for the actual reaction and to solve for the concentration variables of the dissolution-deposition material. Since Fe participates in the dissolution and deposition process, the density of Fe is the same as the density of the dissolution-deposition material. Detailed electrochemical parameter settings are shown in Table 1.

[0080] Table 1 Other simulation parameters

[0081]

[0082] S4.3.2. Selecting the governing equation for the anodic reaction. The main metal dissolution reaction occurs on the anode surface, so the surface reduction reaction is ignored. The current density of the anodic reaction can be calculated using the anodic Tafel equation; therefore, the governing equation is selected as follows:

[0083]

[0084]

[0085] In the formula: i tafel Represents the anode Tafel current, η represents the overpotential, and i 0,an A is the anode exchange current density. an Let i be the Tafel slope of the anode. an i is the anode current density; limThis represents the limiting current density.

[0086] Electrochemical parameter settings for the anodic reaction: Select the general model input for the anodic electrode reaction, and set parameters such as equilibrium potential, exchange current density and polarization curve slope in electrode kinetics. Detailed data are shown in Table 2.

[0087] Table 2 Simulation parameters of the anode electrode surface

[0088]

[0089] S4.4 Add an impressed current surface interface, select the linear anode group in the region selection, and select the governing equation φ. l =φ l,impr , and φ l,limpr :E impr =φ s,sense -φ s,ref The surface region subjected to applied current is controlled, and control potential, induced potential of the protected surface, and reference electrode potential are set. The electrode phase potential dependent variable is set as the induced potential, where φ l,impr E is the electrode potential at infinity at the zero-point current. impr To control the potential; φ s,sense The induced potential on the protected surface; φ s,ref This is the reference electrode potential.

[0090] S4.5 Add a reference electrode interface. Select the reference point as a circle on the working plane according to the actual working conditions.

[0091] S4.6 Add a wireless electrolyte interface. Select the entire region as the boundary and choose the following control equation: Add a wireless electrolyte interface, where ∫ represents the integration operation, i l Let be the electrolyte current density, n be the normal vector of the surface, and dS represent the area or arc length of the infinitesimal element.

[0092] To set the electrolyte conductivity, due to the symmetrical structure, select the corresponding symmetry plane, choose the yz plane of the symmetry plane, set the x position to 0, and set the infinity condition to zero current.

[0093] S5. Mesh Generation. Set mesh boundary nodes for each edge of the finite element calculation model.

[0094] S5 is performed in the following manner:

[0095] Select the physical field partitioning method and the element type as free tetrahedral mesh to partition the horizontal storage tank model and the cathodic protection system model with the applied potential.

[0096] S6. Establish a calculation job and obtain the calculation results (simulation results): three-dimensional electrolyte potential distribution map, electrolyte current density map, electrode potential vs. adjacent reference potential map, and total electrode thickness variation map.

[0097] S7. Repeat steps two through six to obtain the pattern of the cathodic protection system's protective effect on the outer wall of the tank model under different anode laying methods and the number and position of reference electrodes. Determine the optimal anode laying method based on the pattern. The pattern of protection effect is as follows: the more uniform the potential distribution in the electrolyte potential distribution diagram obtained from the calculation results, and the closer it is to the protection potential, the better the protection effect; or according to the electrode total thickness variation diagram obtained from the calculation results, the smaller the corrosion thickness, the lighter the degree of corrosion, and the better the protection effect. The electrolyte current density diagram and the electrode potential vs. adjacent reference potential diagram can be used as auxiliary references.

[0098] The present invention has the following technical effects:

[0099] To address the problems of long on-site testing cycles, high costs, numerous uncertainties, difficulty in large-scale experiments, and inability to verify protection effectiveness in current engineering projects, this invention utilizes numerical analysis methods. Based on the electrochemical parameters of steel used in soil-covered storage tanks obtained from laboratory electrochemical tests, a model of the soil-covered storage tank and its cathodic protection system is established. The influence of different anode laying methods on the performance of the cathodic protection system is analyzed, thereby providing a reference for the design of cathodic protection systems and proposing a more economical and practical solution.

[0100] In view of the above method, this invention provides an anode laying method determination system for a cathodic protection system, used in a cathodic protection system for a soil-covered storage tank. The anode laying method determination system for the cathodic protection system includes:

[0101] The electrochemical parameter determination module is used to determine the corrosive medium based on the soil in the area where the soil-covered storage tank is located, and to use the same material as the soil-covered storage tank as the cathode electrode to conduct electrochemical tests to obtain the electrochemical parameters of the cathode electrode; the electrochemical parameters include exchange current density, polarization curve slope and equilibrium potential.

[0102] The 3D modeling module is used to construct 3D models of the covered storage tank and the linear anode in 3D modeling software based on the actual dimensions of the covered storage tank and the linear anode.

[0103] The three-dimensional modeling module for the cathodic protection system of the soil-covered storage tank is used to lay the three-dimensional model of the linear anode on the three-dimensional model of the soil-covered storage tank according to each preset anode laying method to obtain the three-dimensional model of the cathodic protection system of the soil-covered storage tank corresponding to each preset anode laying method.

[0104] The simulation module is used to import the three-dimensional model of the cathodic protection system of the soil-covered storage tank corresponding to any preset anode laying method into the finite element calculation software and perform simulation based on the electrochemical parameters to obtain the simulation results corresponding to the preset anode laying method.

[0105] The optimal anode laying method determination module is used to determine the optimal anode laying method based on the simulation results corresponding to each preset anode laying method.

[0106] As an optional implementation, the 3D modeling software is SolidWords software.

[0107] As an optional implementation, the finite element calculation software is Comsol software.

[0108] As an optional implementation, the simulation module specifically includes:

[0109] The model import unit is used to import the three-dimensional model of the cathodic protection system of the soil-covered storage tank corresponding to any preset anode laying method into the finite element calculation software.

[0110] An electrolyte region addition unit is used to set the electrolyte region in the finite element calculation software.

[0111] The finite element calculation model determination unit is used to place the three-dimensional model of the cathodic protection system of the soil-covered tank corresponding to the preset anode laying method in the electrolyte region, and to set a reference electrode on the three-dimensional model of the cathodic protection system of the soil-covered tank corresponding to the preset anode laying method to obtain the finite element calculation model.

[0112] The simulation operation unit is used to perform boundary setting operations, secondary current distribution operations, mesh generation operations, and calculation operations on the finite element model according to the electrochemical parameters to obtain the simulation results corresponding to the preset anode laying method.

[0113] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple; relevant parts can be referred to the method section.

[0114] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for determining the anode laying pattern of a cathodic protection system, characterized in that, For a cathodic protection system for a soil-covered storage tank, the method includes: The corrosive medium is determined based on the soil in the area where the soil-covered storage tank is located. The same material as the soil-covered storage tank is used as the cathode electrode, and electrochemical tests are conducted to obtain the electrochemical parameters of the cathode electrode. The electrochemical parameters include exchange current density, polarization curve slope, and equilibrium potential. In 3D modeling software, construct 3D models of the soil-covered storage tank and the linear anode based on the actual dimensions of the soil-covered storage tank and the actual dimensions of the linear anode. According to each preset anode laying method, the linear anode three-dimensional model is laid on the soil-covered storage tank three-dimensional model to obtain the soil-covered storage tank cathodic protection system three-dimensional model corresponding to each preset anode laying method; For any preset anode laying method, the three-dimensional model of the cathodic protection system of the soil-covered storage tank corresponding to the preset anode laying method is imported into the finite element calculation software and the simulation results corresponding to the preset anode laying method are obtained by performing simulation based on the electrochemical parameters. The optimal anode laying method is determined based on the simulation results corresponding to each preset anode laying method.

2. The method for determining the anode laying method of the cathodic protection system according to claim 1, characterized in that, The 3D modeling software is SolidWorks.

3. The method for determining the anode laying method of the cathodic protection system according to claim 1, characterized in that, The finite element calculation software is Comsol.

4. The method for determining the anode laying method of the cathodic protection system according to claim 1, characterized in that, For any preset anode laying method, the three-dimensional model of the cathodic protection system of the soil-covered storage tank corresponding to the preset anode laying method is imported into finite element calculation software to perform simulation based on the electrochemical parameters, and the simulation results corresponding to the preset anode laying method are obtained, specifically including: For any preset anode laying method, import the three-dimensional model of the cathodic protection system of the soil-covered storage tank corresponding to the preset anode laying method into the finite element calculation software; An electrolyte region is set in the finite element calculation software; The three-dimensional model of the cathodic protection system of the soil-covered storage tank corresponding to the preset anode laying method is placed in the electrolyte region, and a reference electrode is set on the three-dimensional model of the cathodic protection system of the soil-covered storage tank corresponding to the preset anode laying method to obtain a finite element calculation model; Based on the electrochemical parameters, the finite element calculation model is sequentially subjected to boundary setting operations, secondary current distribution operations, mesh generation operations, and calculation operations to obtain the simulation results corresponding to the preset anode laying method.

5. A system for determining the anode laying method in a cathodic protection system, characterized in that, For a cathodic protection system for soil-covered storage tanks, the anode laying method determination system of the cathodic protection system includes: The electrochemical parameter determination module is used to determine the corrosive medium based on the soil in the area where the soil-covered storage tank is located, and to use the same material as the soil-covered storage tank as the cathode electrode to conduct electrochemical tests to obtain the electrochemical parameters of the cathode electrode; the electrochemical parameters include exchange current density, polarization curve slope and equilibrium potential. The 3D modeling module is used to construct 3D models of the covered storage tank and the linear anode in 3D modeling software based on the actual dimensions of the covered storage tank and the linear anode. The three-dimensional modeling module for the cathodic protection system of the soil-covered storage tank is used to lay the three-dimensional model of the linear anode on the three-dimensional model of the soil-covered storage tank according to each preset anode laying method to obtain the three-dimensional model of the cathodic protection system of the soil-covered storage tank corresponding to each preset anode laying method. The simulation module is used to import the three-dimensional model of the cathodic protection system of the soil-covered storage tank corresponding to any preset anode laying method into the finite element calculation software and perform simulation based on the electrochemical parameters to obtain the simulation results corresponding to the preset anode laying method. The optimal anode laying method determination module is used to determine the optimal anode laying method based on the simulation results corresponding to each preset anode laying method.

6. The anode laying method determination system for the cathodic protection system according to claim 5, characterized in that, The 3D modeling software is SolidWorks.

7. The anode laying method determination system for the cathodic protection system according to claim 5, characterized in that, The finite element calculation software is Comsol.

8. The anode laying method determination system for the cathodic protection system according to claim 5, characterized in that, The simulation module specifically includes: The model import unit is used to import the three-dimensional model of the cathodic protection system of the soil-covered storage tank corresponding to any preset anode laying method into the finite element calculation software. An electrolyte region addition unit is used to set the electrolyte region in the finite element calculation software; The finite element calculation model determination unit is used to place the three-dimensional model of the cathodic protection system of the soil-covered storage tank corresponding to the preset anode laying method in the electrolyte region, and to set a reference electrode on the three-dimensional model of the cathodic protection system of the soil-covered storage tank corresponding to the preset anode laying method to obtain the finite element calculation model. The simulation operation unit is used to perform boundary setting operation, secondary current distribution operation, mesh generation operation and calculation operation on the finite element calculation model according to the electrochemical parameters to obtain the simulation results corresponding to the preset anode laying method.

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