Method, device, equipment, storage medium and product for determining allowable content of impurities

Abstract

The application discloses a medium impurity allowable content determination method, device, equipment, storage medium and product, relates to the pipeline reuse technical field, and aims to solve the problem of high risk of transmission pipeline leakage based on related technology improvement conveying medium. The method comprises the following steps: acquiring the theoretical wall thickness, historical conveying medium, historical running time length and historical maintenance record of the transmission pipeline; determining the historical corrosion depth and target running time length of the transmission pipeline according to the historical conveying medium, the historical running time length, the historical maintenance record and the target conveying medium; determining the target corrosion rate according to the target failure level, the theoretical wall thickness, the historical corrosion depth and the target running time length; and determining the impurity allowable content according to the target corrosion rate, wherein the failure level is used to represent the failure possibility of the transmission pipeline, the target corrosion rate is the allowable corrosion rate of the transmission pipeline within the target running time length, and the impurity allowable content is the maximum impurity content allowed to exist in the target conveying medium.

Description

Technical Field

[0001] This application relates to the field of pipeline reuse technology, and in particular to methods, apparatus, equipment, storage media and products for determining the permissible content of impurities. Background Technology

[0002] Utilizing existing pipeline networks to retransmit target media has become a key approach to reducing infrastructure investment costs.

[0003] In related technologies, static impurity tolerance thresholds are typically set to limit the impurity content in transmission pipelines. However, different transmission pipelines exhibit varying degrees of corrosion over historical periods. When transporting the target medium in the future, a fixed impurity tolerance threshold cannot reflect the continuously deteriorating corrosion state of the pipeline over time after the pipeline is rerouted. This results in a lack of safety assurance for the transmission pipeline during long-term operation, increasing the potential risks of pipeline perforation, leakage, and even breakage.

[0004] Therefore, it can be concluded that the risk of leakage in transmission pipelines is relatively high when the transport medium is modified based on related technologies. Summary of the Invention

[0005] The purpose of this application is to provide a method, apparatus, equipment, storage medium, and product for determining the permissible content of impurities, aiming to solve the problem of high risk of leakage in transmission pipelines when the transmission medium is modified based on related technologies.

[0006] To achieve the above objectives, this application adopts the following technical solution: In a first aspect, this application provides a method for determining the permissible content of impurities in a medium, comprising: obtaining the theoretical wall thickness, historical transported medium, historical operating time, and historical maintenance records of a transmission pipeline; determining the historical corrosion depth and target operating time of the transmission pipeline based on the historical transported medium, historical operating time, historical maintenance records, and the target transported medium; determining the target corrosion rate based on the target failure level, theoretical wall thickness, historical corrosion depth, and target operating time; wherein the failure level is used to represent the probability of failure of the transmission pipeline, and the target failure level is a preset failure level based on the application requirements of the transmission pipeline; the target corrosion rate is the permissible corrosion rate of the transmission pipeline within the target operating time; and determining the permissible content of impurities based on the target corrosion rate; wherein the permissible content of impurities is the maximum permissible impurity content in the target transported medium.

[0007] In some embodiments, the target corrosion rate satisfies the following formula:

[0008] in, denoted as the target corrosion rate, h as the theoretical wall thickness, d1 as the historical corrosion depth, t as the target operating time, a as the power exponent of the target operating time, and m as the coefficient of the theoretical wall thickness. The value of m is positively correlated with the target failure level; the higher the target failure level, the greater the possibility of failure of the transmission pipeline.

[0009] In some embodiments, when the target failure level is level one, the target corrosion rate satisfies the following formula:

[0010] When the target failure level is level two, the target corrosion rate satisfies the following formula:

[0011] When the target failure level is level three, the target corrosion rate satisfies the following formula:

[0012] When the target failure level is level four, the target corrosion rate satisfies the following formula:

[0013] in, Let be the target corrosion rate, h be the theoretical wall thickness, d1 be the historical corrosion depth, t be the target operating time, and a be the exponent of the target operating time. , , This is a coefficient representing the theoretical wall thickness. Less than ,and Less than When the target failure level is Level 1, the probability of transmission pipeline failure is less than when the target failure level is Level 2; when the target failure level is Level 2, the probability of transmission pipeline failure is less than when the target failure level is Level 3; when the target failure level is Level 3, the probability of transmission pipeline failure is less than when the target failure level is Level 4.

[0014] In some embodiments, determining the permissible impurity content based on the target corrosion rate specifically includes: obtaining the correspondence between different impurity contents and pitting rates; when the pitting rate is less than or equal to the target corrosion rate, determining the impurity content corresponding to the pitting rate as the permissible impurity content.

[0015] In some embodiments, determining the historical corrosion depth and target operating time of the transmission pipeline based on the historical transported medium, historical operating time, historical maintenance records, and target transported medium includes: determining the historical corrosion depth based on the historical transported medium, historical operating time, and historical maintenance records; and determining the target operating time based on the historical corrosion depth and target transported medium.

[0016] In some embodiments, determining the historical corrosion depth based on historical transported media, historical operating time, and historical maintenance records specifically includes: obtaining a first inherent corrosion rate of the historical transported media; determining the historical corrosion increment of the transport pipeline based on the first inherent corrosion rate and historical operating time; determining the historical corrosion reduction of the transport pipeline based on historical maintenance records; and determining the historical corrosion depth of the transport pipeline based on the historical corrosion increment and historical corrosion reduction.

[0017] In some embodiments, determining the target operating time based on the historical corrosion depth and the target transport medium specifically includes: obtaining the operating requirements of the target transport medium and the second inherent corrosion rate of the target transport medium; and predicting the target operating time based on the historical corrosion depth, operating requirements, and the second inherent corrosion rate.

[0018] Secondly, a device for determining the permissible content of impurities in a medium is provided. The device includes: a communication unit and a determination unit; the communication unit is used to acquire the theoretical wall thickness, historical transported medium, historical operating time, and historical maintenance records of a transmission pipeline; the determination unit is used to determine the historical corrosion depth and target operating time of the transmission pipeline based on the historical transported medium, historical operating time, historical maintenance records, and the target transported medium; the determination unit is further used to determine the target corrosion rate based on the target failure level, theoretical wall thickness, historical corrosion depth, and target operating time; the failure level represents the probability of failure of the transmission pipeline, and the target failure level is a preset failure level based on the application requirements of the transmission pipeline; the target corrosion rate is the permissible corrosion rate of the transmission pipeline within the target operating time; the determination unit is further used to determine the permissible content of impurities based on the target corrosion rate; the permissible content of impurities is the maximum permissible impurity content in the target transported medium.

[0019] Thirdly, an apparatus for determining the permissible content of media impurities is provided, comprising: a processor and a memory; wherein the memory is used to store one or more programs, the one or more programs including computer-executable instructions, and when the apparatus is running, the processor executes the computer-executable instructions stored in the memory to cause the apparatus to perform the method for determining the permissible content of media impurities as described in the first aspect.

[0020] The device for determining the permissible content of media impurities can be an electronic device or a component of an electronic device, such as a chip system within the electronic device. This chip system supports the electronic device in implementing the functions involved in the first aspect and any possible implementation thereof, such as acquiring and determining the data and / or information involved in the method for determining the permissible content of media impurities. The chip system includes a chip, but may also include other discrete devices or circuit structures.

[0021] Fourthly, a computer-readable storage medium is provided, wherein when computer-executable instructions stored in the computer-readable storage medium are executed by a processor of a medium impurity tolerance determination device, the medium impurity tolerance determination device is capable of executing the medium impurity tolerance determination method as described in the first aspect.

[0022] Fifthly, a computer program product is also provided, comprising: a computer program or instructions that, when executed on a computer, cause the computer to perform the method for determining the permissible content of media impurities as described in the first aspect.

[0023] It should be noted that the aforementioned computer instructions may be stored, in whole or in part, on a computer-readable storage medium. This computer-readable storage medium may be packaged together with the processor of the device for determining the permissible content of media impurities, or it may be packaged separately from the processor of the device for determining the permissible content of media impurities; this application does not limit this.

[0024] In the embodiments of this application, the name of the device for determining the permissible content of medium impurities does not limit the device or functional module itself. In actual implementation, these devices or functional modules may appear under other names. For example, the receiving unit may also be called a receiving module, receiver, etc. As long as the function of each device or functional module is similar to that of this application, it falls within the scope of the claims of this application and its equivalents.

[0025] The technical solution provided in this application brings at least the following beneficial effects: In this embodiment, the inherent properties of the transmission pipeline and multi-dimensional historical operational data are collected, providing a sufficient data foundation for the subsequent quantitative assessment of corrosion status, thereby improving the comprehensiveness and reliability of the determination results of the allowable impurity content. Simultaneously, historical maintenance records are introduced as a basis for correcting the cumulative corrosion effect, and targeted adjustments are made based on the differences between the target transport medium and historical media. This allows the calculated historical corrosion depth to more closely reflect the actual service condition of the pipeline, thus improving the rationality of the target operating time setting. Furthermore, this application uses a preset target failure level as an upper limit constraint on the allowable corrosion degree, and correlates this constraint with the theoretical wall thickness and the depth of corrosion already occurred. This ensures that the target corrosion rate value matches the actual safety redundancy of the transmission pipeline, thereby helping to avoid safety risks caused by excessive maintenance due to overly strict corrosion rate settings or overly lenient settings. Further, a quantitative mapping relationship between corrosion rate and media impurity content is established, transforming pipeline safety assessment results into operable indicators for media quality control, thus providing clear quantitative control targets for the purification process of the transported media. As can be seen from the above, this application uses the existing operating data of the transmission pipeline to adaptively determine the allowable impurity content through the above method. It can provide differentiated and quantifiable allowable impurity content for different transmission pipelines with different historical operating times and target transport media, thereby reducing the risk of leakage, perforation and breakage of the transmission pipeline.

[0026] The beneficial effects of the first, second, third, fourth, and fifth aspects of this application can all be referred to in the analysis of the above-mentioned beneficial effects, and will not be repeated here. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A flowchart illustrating a method for determining the permissible content of impurities in a medium, provided in an embodiment of this application; Figure 2 A flowchart illustrating another method for determining the permissible content of media impurities provided in this application embodiment; Figure 3 A flowchart illustrating another method for determining the permissible content of media impurities provided in this application embodiment; Figure 4 A flowchart illustrating another method for determining the permissible content of media impurities provided in this application embodiment; Figure 5 A schematic diagram of a device for determining the permissible content of impurities in a medium, provided in an embodiment of this application; Figure 6 This is a schematic diagram of the hardware structure of a device for determining the permissible content of impurities in a medium, provided in an embodiment of this application. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] It should be noted that in the embodiments of this application, the words "exemplary" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design schemes. Specifically, the use of the words "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0031] To facilitate a clear description of the technical solutions of the embodiments of this application, the terms "first" and "second" are used in the embodiments of this application to distinguish the same or similar items with essentially the same function and effect. Those skilled in the art can understand that the terms "first" and "second" are not intended to limit the quantity or execution order.

[0032] Before providing a detailed introduction to the method for determining the permissible content of media impurities provided in this application, let's first briefly introduce the application scenarios and implementation environment involved in this application.

[0033] First, a brief introduction to the application scenarios involved in this application will be given.

[0034] As described in the background section, the historical transported medium refers to the medium transported by the pipeline during a historical period (such as oil or natural gas). As the pipeline is worn down, the pipeline stress becomes insufficient to support continued transport of this medium. To ensure the safety of the pipeline network, other media (such as carbon dioxide) can be transported, or the original medium may no longer be transported, allowing for the reuse of the pipeline. Utilizing the existing pipeline network to transport the target medium can reduce infrastructure investment costs. However, if the target medium or its impurities are corrosive, directly converting the existing pipeline to transport the target medium would increase the risk of pipeline leakage.

[0035] In related technologies, static impurity tolerance thresholds are typically set to limit the impurity content in transmission pipelines. However, different transmission pipelines exhibit varying degrees of corrosion over historical periods. When transporting the target medium in the future, a fixed impurity tolerance threshold cannot reflect the continuously deteriorating corrosion state of the pipeline over time after the pipeline is rerouted. This results in a lack of safety assurance for the transmission pipeline during long-term operation, increasing the potential risks of pipeline perforation, leakage, and even breakage.

[0036] With the rapid development of global carbon capture, utilization, and storage (CCUS) technologies, existing pipeline networks (such as oil and gas pipelines) can be repurposed to transport gaseous carbon dioxide (CO2), thereby reducing infrastructure costs. However, gaseous carbon dioxide forms highly corrosive carbonic acid under aqueous conditions and contains impurities such as hydrogen sulfide (H2S), oxygen (O2), and sulfur oxides (SOx). The synergistic effect of these substances can lead to significant corrosion risks.

[0037] The adoption of related technologies severely restricts the efficient and secure utilization of existing transmission pipeline assets in the CCUS industry chain.

[0038] Therefore, it can be concluded that the risk of leakage in transmission pipelines is relatively high when the transport medium is modified based on related technologies.

[0039] To address the aforementioned problems, this application provides a method for determining the permissible content of media impurities, applicable to a device for determining the permissible content of media impurities. The device for determining the permissible content of media impurities can be any device within a pipeline control system (including monitoring or control equipment, or other auxiliary equipment), or it can be a separately configured device, such as a server, terminal, or other type of electronic equipment; this application does not limit this.

[0040] Optionally, the aforementioned terminal can be a device that provides voice and / or data connectivity to the user, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal. It can also be a portable, pocket-sized, handheld, computer-embedded, or vehicle-mounted mobile device that exchanges voice and / or data with a wireless access network, such as a mobile phone, tablet computer, laptop computer, netbook, or personal digital assistant (PDA). Optionally, the aforementioned server can be one server in a server cluster (composed of multiple servers), a chip within that server, a system-on-a-chip (SoC) within that server, or a virtual machine (VM) deployed on a physical machine. This application does not limit the implementation of these embodiments.

[0041] The method for determining the permissible content of media impurities provided in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0042] like Figure 1 As shown, the methods for determining the permissible content of impurities in the medium include: S101. Obtain the theoretical wall thickness, historical transported medium, historical operating time, and historical maintenance records of the transmission pipeline.

[0043] The theoretical wall thickness (also known as the nominal wall thickness) refers to the design wall thickness calculated in the early stages of production and transmission of pipelines to withstand the internal pressure of the pipeline. It may differ from the actual wall thickness.

[0044] Historical transported media refers to the media transported by the pipeline during a historical period, such as oil and natural gas. The degree of corrosion (or damage) caused by transporting different media within the same operating period of the pipeline is different.

[0045] During the same operating period, pipelines transporting dry gas showed almost no corrosion, with very slight pitting depth on their inner walls, virtually no corrosion products, and almost no wall thickness reduction. Pipelines transporting water-containing crude oil exhibited corrosion; the higher the water content, the greater the pitting depth on the inner walls, the presence of corrosion products, and significant wall thickness reduction. Pipelines transporting natural gas containing carbon dioxide and hydrogen sulfide were prone to severe electrochemical corrosion, with significant pitting depth on the inner walls, more corrosion products, and severe wall thickness reduction, leading to perforation, leakage, and cracking of the pipeline.

[0046] Historical runtime includes: commissioning runtime (i.e., the time from when the transmission pipeline is put into operation to when the medium is transferred) and cumulative runtime.

[0047] Historical maintenance records include: corrosion detection records, outage maintenance records (such as local dents or deformation), and maintenance and replacement records (such as welding repair and pipe replacement).

[0048] In some embodiments, data such as the theoretical wall thickness, historical transported media, historical operating time, and historical maintenance records of the transmission pipeline can be obtained from the pipeline management database.

[0049] The theoretical wall thickness represents the initial thickness of the transmission pipeline before corrosion. The historical transported medium directly determines the corrosion type and rate of the pipeline. Historical operating time combined with corrosion rate can determine the degree of corrosion of the pipeline before the change of transported medium. Historical maintenance records reflect the specific problems that occurred in the pipeline. By combining these data, the historical corrosion depth (also known as historical corrosion status) of the pipeline can be accurately assessed, and its target operating time (i.e., remaining life) can be predicted.

[0050] S102. Based on the historical transported medium, historical operating time, historical maintenance records, and target transported medium, determine the historical corrosion depth and target operating time of the transmission pipeline.

[0051] In some examples, the target transport medium is carbon dioxide.

[0052] The historical transport medium directly determines the intensity of electrochemical or chemical reactions that occur in the pipe wall material per unit time. Based on the historical transport medium and historical operating time, the theoretical cumulative thinning of the pipe wall due to corrosion during the historical operating period can be obtained.

[0053] However, the actual corrosion state of transmission pipelines is not a simple linear cumulative process. The data recorded in historical maintenance records can be quantified as the corrosion reduction corresponding to maintenance. Therefore, by comprehensively reviewing historical maintenance records, the historical corrosion depth of transmission pipelines can be accurately assessed.

[0054] Based on the historical corrosion depth, the target transported medium determines the extent of further corrosion in the pipeline during the future operating period. Therefore, according to the historical corrosion depth and the target transported medium, the length of time the pipeline can operate safely while transporting the target medium can be determined.

[0055] S103. Determine the target corrosion rate based on the target failure level, theoretical wall thickness, historical corrosion depth, and target operating time.

[0056] Failure level is used to indicate the probability of failure of the transmission pipeline. The target failure level is a preset failure level based on the application requirements of the transmission pipeline.

[0057] The target corrosion rate is the allowable corrosion rate of the transmission pipeline during the target operating time.

[0058] The ratio of corrosion depth to theoretical wall thickness is defined as the corrosion depth ratio. The failure level is related to the corrosion depth ratio. The corrosion depth is the sum of the historical corrosion depth and the predicted corrosion depth (i.e., the additional corrosion depth after changing the target transport medium). In this application embodiment, the target corrosion rate can be inferred by using the target failure level, theoretical wall thickness, historical corrosion depth and target operating time.

[0059] Specifically, the corrosion depth ratio satisfies the following formula:

[0060] Where η is the corrosion depth ratio (unitless), d is the corrosion depth (in millimeters), and h is the theoretical wall thickness (in millimeters).

[0061] The corrosion depth satisfies the following formula:

[0062] Where d is the corrosion depth in millimeters, d1 is the historical corrosion depth in millimeters, and d2 is the predicted corrosion depth in millimeters.

[0063] The predicted corrosion depth satisfies the following formula:

[0064] Where d2 is the predicted corrosion depth, in millimeters. The target corrosion rate is expressed in millimeters per year, t is the target operating time in years, and a is the exponent of the target operating time, which can be 0.4.

[0065] In the above embodiments, the corrosion depth ratio can be correlated with the failure level classification.

[0066] For example, when the corrosion depth ratio is less than 0.1, meaning the corrosion depth is less than 10% of the theoretical wall thickness, corrosion failure of the transmission pipeline is practically impossible, and the failure level can be set to Level 1. When the corrosion depth ratio is greater than 0.1 and less than 0.2, meaning the corrosion depth is 10% to 20% of the theoretical wall thickness, corrosion failure of the transmission pipeline is extremely rare, and the failure level can be set to Level 2. When the corrosion depth ratio is greater than 0.2 and less than 0.3, meaning the corrosion depth is 20% to 30% of the theoretical wall thickness, corrosion failure of the transmission pipeline occurs occasionally, and the failure level can be set to Level 3. When the corrosion depth ratio is greater than 0.3, meaning the corrosion depth is greater than 30% of the theoretical wall thickness, corrosion failure of the transmission pipeline is highly likely, and the failure level can be set to Level 4.

[0067] In the embodiments of this application, after knowing the theoretical wall thickness, historical corrosion depth and target operating time of the transmission pipeline, by selecting the target failure level, the allowable corrosion rate of the transmission pipeline within the target operating time—the target corrosion rate, or the parameter range of the acceptable pitting rate of the transmission pipeline within the target operating time can be deduced.

[0068] S104. Determine the permissible impurity content based on the target corrosion rate.

[0069] The permissible impurity content is the maximum amount of impurities that can be present in the target transport medium.

[0070] Since different impurities have different corrosion rates, and the correspondence between the corrosion rate of different impurities and the impurity content is known, the target corrosion rate has been determined in the above embodiments. Therefore, the allowable impurity content can be determined based on the target corrosion rate.

[0071] In this embodiment, the inherent properties of the transmission pipeline and multi-dimensional historical operational data are collected, providing a sufficient data foundation for the subsequent quantitative assessment of corrosion status, thereby improving the comprehensiveness and reliability of the determination results of the allowable impurity content. Simultaneously, historical maintenance records are introduced as a basis for correcting the cumulative corrosion effect, and targeted adjustments are made based on the differences between the target transport medium and historical media. This allows the calculated historical corrosion depth to more closely reflect the actual service condition of the pipeline, thus improving the rationality of the target operating time setting. Furthermore, this application uses a preset target failure level as an upper limit constraint on the allowable corrosion degree, and correlates this constraint with the theoretical wall thickness and the depth of corrosion already occurred. This ensures that the target corrosion rate value matches the actual safety redundancy of the transmission pipeline, thereby helping to avoid safety risks caused by excessive maintenance due to overly strict corrosion rate settings or overly lenient settings. Further, a quantitative mapping relationship between corrosion rate and media impurity content is established, transforming pipeline safety assessment results into operable indicators for media quality control, thus providing clear quantitative control targets for the purification process of the transported media. As can be seen from the above, this application utilizes the existing operating data of the transmission pipeline to adaptively determine the permissible impurity content, thereby reducing the risk of leakage in the transmission pipeline.

[0072] In some embodiments, combined with Figure 1 ,like Figure 2 As shown, in S102, based on the historical transported medium, historical operating time, historical maintenance records, and the target transported medium, the historical corrosion depth and target operating time of the transmission pipeline are determined, specifically including: S201. Determine the historical corrosion depth based on the historical transported medium, historical operating time, and historical maintenance records.

[0073] In conjunction with the above embodiments, the historical transported medium directly determines the corrosion type and rate of the transmission pipeline. The historical operating time, combined with the corrosion rate, can determine the degree of corrosion of the transmission pipeline before the change of transported medium. Historical maintenance records reflect the specific problems that occurred in the transmission pipeline. By combining these data, the historical corrosion depth of the transmission pipeline can be accurately assessed.

[0074] In some embodiments, the historical corrosion depth is determined based on historical transported media, historical operating time, and historical maintenance records, specifically including: S2011, Obtain the first inherent corrosion rate of the historical transmission medium.

[0075] In one example, the first inherent corrosion rate of the historical transport medium is obtained by acquiring a historical transport medium and corrosion rate comparison table.

[0076] S2012. Determine the historical corrosion increment of the transmission pipeline based on the first inherent corrosion rate and historical operating time.

[0077] Historical corrosion increment refers to the cumulative thinning of the pipe wall material or the increase in corrosion depth caused by the corrosive effects of the transported medium during the historical operation of the pipeline. It represents the total degree of corrosion that the pipeline should theoretically produce without maintenance intervention.

[0078] In one example, the historical corrosion increment of the transmission pipeline is obtained by calculating the product of the first inherent corrosion rate and the historical operating time.

[0079] S2013. Based on historical maintenance records, determine the historical corrosion reduction of the transmission pipeline.

[0080] Historical corrosion reduction refers to the extent to which corrosion damage in a transmission pipeline has been repaired or the corrosion process has been inhibited due to maintenance measures (such as internal coating repair, local welding, and descaling) during its historical operation. It represents the depth of correction deducted from the total cumulative corrosion of the transmission pipeline by maintenance activities.

[0081] In one example, based on historical maintenance records, the corrosion reduction amount corresponding to each maintenance in the historical maintenance records is determined, and the corrosion reduction amount corresponding to each maintenance is added together to obtain the historical corrosion reduction amount.

[0082] S2014. Determine the historical corrosion depth of the transmission pipeline based on the historical corrosion increment and historical corrosion reduction.

[0083] The difference between the historical corrosion increment and the historical corrosion reduction is the historical corrosion depth of the transmission pipeline.

[0084] In other embodiments, the thinning of the pipeline wall can be determined based on technologies such as pipeline cleaning and non-destructive magnetic flux leakage detection. This information can then be combined with historical transport media, historical operating time, and historical maintenance records to make an auxiliary judgment, so as to accurately determine the historical corrosion depth of the pipeline.

[0085] In this embodiment, the historical corrosion increment is determined based on the first inherent corrosion rate and the historical operating time, and the historical corrosion reduction is determined based on the historical maintenance records. The historical corrosion depth is then determined by combining the historical corrosion increment and the historical corrosion reduction. This method quantifies the cumulative effect of the corrosion process and the repair effect of maintenance intervention, allowing the calculation of the historical corrosion depth to take into account both the physical thinning process of the pipe wall material and the corrective effect of artificial maintenance measures on the corrosion state. This avoids the problem of overestimation or underestimation of corrosion caused by simply adding up the transport medium and operating time, and improves the objectivity and accuracy of the historical corrosion depth determination results.

[0086] S202. Determine the target operating time based on the historical corrosion depth and the target transport medium.

[0087] In conjunction with the above embodiments, the historical corrosion depth reflects the degree of corrosion of the transmission pipeline during the historical operating time, while the target transport medium reflects the operating condition of the transmission pipeline during the future operating time. These two data can then be used to predict the operating time (also known as the service life or remaining life) of the transmission pipeline for transporting the target transport medium.

[0088] In some embodiments, the target runtime is determined based on the historical corrosion depth and the target transport medium, specifically including: S2021. Obtain the operating requirements of the target transport medium and the second inherent corrosion rate of the target transport medium.

[0089] The operational requirements of the target transported medium reflect the upper limit of the safe load capacity of the transmission pipeline for the target medium, such as the expected operating time, the maximum allowable wall thickness reduction, or the maximum allowable corrosion depth.

[0090] In one example, the inherent corrosion rate of the target transport medium is obtained by acquiring a target transport medium and corrosion rate comparison table, and based on the target transport medium and corrosion rate comparison table.

[0091] S2022. Based on historical corrosion depth, operational requirements, and the second inherent corrosion rate, predict the target operating time.

[0092] In one example, the allowable corrosion depth of the transmission pipeline is determined based on operational requirements. The difference between the allowable corrosion depth and the historical corrosion depth is used as the predicted corrosion depth. The product of the second inherent corrosion rate and the predicted target runtime is used as the predicted corrosion depth, and the predicted target runtime can then be calculated.

[0093] The target runtime can be increased or decreased according to operational requirements.

[0094] In this embodiment, the method of obtaining the operational requirements and second inherent corrosion rate of the target transport medium, and predicting the target runtime based on historical corrosion depth, operational requirements, and the second inherent corrosion rate, enables the correlation calculation between the corrosion characteristics of the target transport medium itself and the actual remaining wall thickness of the transmission pipeline. This provides a quantitative basis for the prediction of the target runtime at the corrosion kinetics level. Furthermore, by introducing operational requirements as a constraint on the target runtime, the setting of this runtime ensures that it meets both the pipeline safety margin and the actual transport schedule requirements. This helps avoid the problem of the target runtime being out of sync with the actual operation and maintenance plan due to calculations based solely on the corrosion rate, and prevents frequent shutdowns for maintenance due to an excessively short target runtime or the accumulation of safety hazards due to an excessively long target runtime.

[0095] As can be seen from the above embodiments, the target corrosion rate is calculated by back-calculation based on the historical corrosion depth, target operating time, target failure level, and theoretical wall thickness.

[0096] In the above embodiments, the target corrosion rate satisfies the following formula:

[0097] in, denoted as the target corrosion rate, h as the theoretical wall thickness, d1 as the historical corrosion depth, t as the target operating time, a as the power exponent of the target operating time, and m as the coefficient of the theoretical wall thickness.

[0098] The value of m is positively correlated with the target failure level; the higher the target failure level, the greater the possibility of failure of the transmission pipeline.

[0099] In some embodiments, the range of the target corrosion rate is determined based on the target failure level.

[0100] When the target failure level is level one, the target corrosion rate satisfies the following formula:

[0101] When the target failure level is level two, the target corrosion rate satisfies the following formula:

[0102] When the target failure level is level three, the target corrosion rate satisfies the following formula:

[0103] When the target failure level is level four, the target corrosion rate satisfies the following formula:

[0104] in, Let be the target corrosion rate, h be the theoretical wall thickness, d1 be the historical corrosion depth, t be the target operating time, and a be the exponent of the target operating time. , , This is a coefficient representing the theoretical wall thickness. Less than ,and Less than When the target failure level is Level 1, the probability of transmission pipeline failure is lower than when the target failure level is Level 2. When the target failure level is Level 2, the probability of transmission pipeline failure is lower than when the target failure level is Level 3. When the target failure level is Level 3, the probability of transmission pipeline failure is lower than when the target failure level is Level 4.

[0105] In some examples, m1 is 0.1, m2 is 0.2, and m3 is 0.3.

[0106] Based on the above embodiments, when the failure level is first level, corrosion failure of the transmission pipeline is basically impossible; when the failure level is second level, corrosion failure of the transmission pipeline is very rare; when the failure level is third level, corrosion failure of the transmission pipeline occurs occasionally; and when the failure level is fourth level, corrosion failure of the transmission pipeline is highly likely to occur.

[0107] In the above embodiments, the target failure level is divided into four levels, and different corrosion rate calculation formulas are configured for each level. The coefficients m1, m2, and m3 corresponding to each level satisfy the condition that m1 is less than m2 and m2 is less than m3. Simultaneously, the failure probability increases progressively for each level, quantifying the difference in failure probability into a graded range of theoretical wall thickness coefficients. This allows the allowable range of the target corrosion rate to narrow or widen stepwise as the failure level increases. By establishing differentiated corrosion rate judgment boundaries for transmission pipelines with different safety requirements, it helps avoid overly conservative or insufficient risk assessment problems caused by a single threshold, ensuring the operational reliability of high-safety-level transmission pipelines and preventing resource waste caused by overly stringent maintenance standards for low-safety-level transmission pipelines. Furthermore, the introduction of a power exponent in the formula allows for nonlinear correction of the target operating time, reflecting the acceleration or deceleration effect of time on the corrosion process, thereby improving the environmental adaptability of corrosion rate settings under different life extension scenarios.

[0108] In some embodiments, a correlation model between residual strength and target corrosion rate (also known as pitting rate) can be established, that is, the target corrosion rate is correlated with the target failure level, corrosion depth (including historical corrosion depth and predicted corrosion depth), and theoretical wall thickness. Using the corrosion depth ratio as the criterion for failure level, based on the existing corrosion depth of the transmission pipeline before the relocation and the target operating length after the relocation, the acceptable range of target corrosion rates for the transmission pipeline under different failure levels can be deduced.

[0109] In this embodiment, the residual strength is not the complete mechanical residual strength calculated strictly based on parameters such as burst pressure, pipe diameter, steel grade, and defect length. Instead, it is a relative residual strength evaluation based on the ratio of the remaining wall thickness (i.e., the difference between the theoretical wall thickness and the corrosion depth). In this embodiment, the ratio of the remaining wall thickness to the theoretical wall thickness is used to characterize the degree of attenuation of the transmission pipeline's load-bearing capacity.

[0110] In some embodiments, combined with Figure 2 ,like Figure 3 As shown, in S104, the allowable impurity content is determined based on the target corrosion rate, specifically including: S301. Obtain the corresponding relationship between different impurity contents and pitting rates.

[0111] In one example, the pitting rate can be determined by collecting the known correspondence between different impurity contents and pitting rates, or by conducting experiments to determine the pitting rate under different experimental conditions and single-factor variable experiments with different impurity composition conditions.

[0112] Taking carbon dioxide as the target transport medium as an example, it is necessary to obtain the corresponding relationships between different hydrogen sulfide contents and pitting rates, different oxygen contents and pitting rates, and different sulfur oxide contents and pitting rates.

[0113] S302. When the pitting rate is less than or equal to the target corrosion rate, the impurity content corresponding to the pitting rate shall be determined as the permissible impurity content.

[0114] In some embodiments, a correspondence f(CRr) between impurity content and pitting rate is established. When the pitting rate corresponding to a certain impurity content is less than or equal to the target corrosion rate, the impurity content is taken as the allowable impurity content under the corresponding target operating time and target failure level. When the pitting rate corresponding to a certain impurity content is greater than the target corrosion rate, it is considered that the impurity content will cause the transmission pipeline to enter a higher failure level within the target operating time.

[0115] In some other embodiments, in conjunction with the above embodiments, while establishing a correlation model between residual strength and target corrosion rate, the relationship between impurity content and target failure level of transmission pipeline is constructed using pitting rate as an intermediate variable, thereby determining the permissible impurity content.

[0116] Based on the above embodiments, the permissible impurity content under different target operation and different failure levels can be determined by back-calculating the target corrosion rate.

[0117] In this embodiment, a quantitative correlation is established between impurity content and pitting rate, providing clear data support for determining the allowable impurity content. Furthermore, using the pitting rate not exceeding the target corrosion rate as a screening condition transforms the overall pipeline corrosion safety margin into a constraint on the localized deterioration process of pitting corrosion. This helps ensure that the determined allowable impurity content does not exceed the design limits at the pipe wall thinning level. In addition, the corresponding impurity content threshold can be directly looked up from the target corrosion rate through the correlation, eliminating the need to repeat corrosion experiments for each target corrosion rate. This simplifies the determination process and improves the efficiency of determining the allowable impurity content.

[0118] In some embodiments, a flowchart illustrating the method for determining the permissible content of media impurities is shown below. Figure 4 As shown.

[0119] First, obtain basic information about the transmission pipeline, including: the theoretical wall thickness of the transmission pipeline, historical transported media, historical operating time, and historical maintenance records.

[0120] Then, based on the basic conditions of the transmission pipeline, the historical corrosion depth of the transmission pipeline is determined.

[0121] Next, based on the correlation model between residual strength and pitting rate and the target failure level, the pitting rate division interval is determined.

[0122] Next, based on the pitting rate range, historical corrosion depth, and inherent corrosion rate of the target transport medium, the correlation between impurity content and target failure level is established.

[0123] Next, based on the correlation between impurity content and target failure level, the permissible impurity content is determined.

[0124] In summary, the embodiments of this application adaptively determine the permissible impurity content based on existing operating data and failure level requirements of the transmission pipeline. This overcomes the shortcomings of related technologies that neglect the accumulated corrosion damage of the transmission pipeline over its historical operating time, leading to misjudgments of the actual remaining strength or wall thickness of the transmission pipeline. Furthermore, combined with research on carbon dioxide pipeline transportation technology (including transportation processes, pipe materials and equipment, and safety control), and the research results on long-distance, high-pressure, low-temperature, and supercritical carbon dioxide pipeline transportation, the method for determining the permissible impurity content provided in this application can be applied to the field of converting transmission pipelines to transport carbon dioxide, thus meeting the safety operation and management requirements of carbon dioxide conversion pipelines.

[0125] The foregoing mainly describes the solutions provided by the embodiments of this application from a methodological perspective. To achieve the above functions, it includes corresponding hardware structures and / or software modules for executing each function. Those skilled in the art should readily recognize that, based on the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0126] This application embodiment can divide the device for determining the permissible content of medium impurities into functional modules based on the above method example. For example, each function can be divided into its own functional module, or two or more functions can be integrated into one processing module. The integrated module can be implemented in hardware or as a software functional module. Optionally, the module division in this application embodiment is illustrative and only represents one logical functional division; other division methods may be used in actual implementation.

[0127] Figure 5 A schematic diagram of a device for determining the permissible content of media impurities provided in an embodiment of this application is shown. Figure 5 As shown, the device for determining the permissible content of impurities in the medium includes a communication unit 501 and a determination unit 502.

[0128] Communication unit 501 is used to acquire the theoretical wall thickness, historical transported medium, historical operating time, and historical maintenance records of the transmission pipeline; determination unit 502 is used to determine the historical corrosion depth and target operating time of the transmission pipeline based on the historical transported medium, historical operating time, historical maintenance records, and target transported medium; determination unit 502 is also used to determine the target corrosion rate based on the target failure level, theoretical wall thickness, historical corrosion depth, and target operating time; the failure level is used to represent the failure probability of the transmission pipeline, and the target failure level is a preset failure level based on the application requirements of the transmission pipeline; the target corrosion rate is the allowable corrosion rate of the transmission pipeline within the target operating time; determination unit 502 is also used to determine the allowable impurity content based on the target corrosion rate; the allowable impurity content is the maximum impurity content allowed to exist in the target transported medium.

[0129] Optionally, the target corrosion rate satisfies the following formula:

[0130] in, denoted as the target corrosion rate, h as the theoretical wall thickness, d1 as the historical corrosion depth, t as the target operating time, a as the power exponent of the target operating time, and m as the coefficient of the theoretical wall thickness. The value of m is positively correlated with the target failure level; the higher the target failure level, the greater the possibility of failure of the transmission pipeline.

[0131] Optionally, when the target failure level is level one, the target corrosion rate satisfies the following formula:

[0132] When the target failure level is level two, the target corrosion rate satisfies the following formula:

[0133] When the target failure level is level three, the target corrosion rate satisfies the following formula:

[0134] When the target failure level is level four, the target corrosion rate satisfies the following formula:

[0135] in, Let be the target corrosion rate, h be the theoretical wall thickness, d1 be the historical corrosion depth, t be the target operating time, and a be the exponent of the target operating time. , , This is a coefficient representing the theoretical wall thickness. Less than ,and Less than When the target failure level is Level 1, the probability of transmission pipeline failure is less than when the target failure level is Level 2; when the target failure level is Level 2, the probability of transmission pipeline failure is less than when the target failure level is Level 3; when the target failure level is Level 3, the probability of transmission pipeline failure is less than when the target failure level is Level 4.

[0136] Optionally, based on the target corrosion rate, the allowable impurity content is determined, specifically including: obtaining the correspondence between different impurity contents and pitting rates; when the pitting rate is less than or equal to the target corrosion rate, the impurity content corresponding to the pitting rate is determined as the allowable impurity content.

[0137] Optionally, the determining unit 502 is specifically used to: determine the historical corrosion depth based on the historical transported medium, historical running time, and historical maintenance records; and determine the target running time based on the historical corrosion depth and the target transported medium.

[0138] Optionally, the determining unit 502 is specifically used for: obtaining the first inherent corrosion rate of the historical transmission medium; determining the historical corrosion increment of the transmission pipeline based on the first inherent corrosion rate and the historical operating time; determining the historical corrosion reduction of the transmission pipeline based on historical maintenance records; and determining the historical corrosion depth of the transmission pipeline based on the historical corrosion increment and the historical corrosion reduction.

[0139] Optionally, the determining unit 502 is specifically used to: obtain the operating requirements of the target transport medium and the second inherent corrosion rate of the target transport medium; and predict the target operating time based on the historical corrosion depth, operating requirements, and second inherent corrosion rate.

[0140] like Figure 6 The diagram shown is a hardware structure schematic of a device for determining the permissible content of media impurities according to an embodiment of this application. The device includes a processor 61, a memory 62, a communication interface 63, and a bus 64. The processor 61, memory 62, and communication interface 63 are connected via the bus 64.

[0141] Processor 61 is the control center of the device for determining the permissible content of media impurities. It can be a single processor or a collective term for multiple processing elements. For example, processor 61 can be a general-purpose central processing unit (CPU) or other general-purpose processors. Among them, the general-purpose processor can be a microprocessor or any conventional processor.

[0142] As one embodiment, processor 61 may include one or more CPUs, for example Figure 6CPU0 and CPU1 are shown in the diagram.

[0143] The memory 62 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or electrically erasable programmable read-only memory (EEPROM), disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but is not limited thereto.

[0144] In one possible implementation, the memory 62 can exist independently of the processor 61. The memory 62 can be connected to the processor 61 via a bus 64 and is used to store instructions or program code. When the processor 61 calls and executes the instructions or program code stored in the memory 62, it can implement the method for determining the permissible content of medium impurities provided in the embodiments of this application.

[0145] In this embodiment, the software programs stored in memory 62 differ for the device for determining the permissible content of medium impurities, thus resulting in different functions implemented by the device. The functions performed by each device will be described in conjunction with the following flowchart.

[0146] In another possible implementation, memory 62 can also be integrated with processor 61.

[0147] Communication interface 63 is used for the device for determining the permissible content of medium impurities to connect with other devices via a communication network, such as Ethernet, wireless access network, or wireless local area network (WLAN). Communication interface 63 may include a receiving unit for receiving data and a transmitting unit for transmitting data.

[0148] Bus 64 can be an industry standard architecture (ISA) bus, a peripheral component interconnect (PCI) bus, or an extended industry standard architecture (EISA) bus, etc. This bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 6 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0149] It should be pointed out that, Figure 6 The structure shown does not constitute a limitation on the device for determining the permissible content of impurities in the medium, except... Figure 6 In addition to the components shown, the device for determining the permissible content of impurities in the medium may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0150] This application also provides a computer-readable storage medium, which includes computer-executable instructions. When the computer-executable instructions are executed on a computer, the computer performs the method for determining the permissible content of media impurities as provided in the above embodiments.

[0151] This application also provides a computer program that can be directly loaded into a memory and contains software code. After being loaded and executed by a computer, the computer program can implement the method for determining the permissible content of medium impurities provided in the above embodiments.

[0152] Those skilled in the art will recognize that, in one or more of the examples above, the functions described in this application can be implemented using hardware, software, firmware, or any combination thereof. When implemented in software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or code on a computer-readable medium. Computer-readable media include computer-readable storage media and communication media, wherein communication media include any medium that facilitates the transmission of a computer program from one place to another. Storage media can be any available medium accessible to a general-purpose or special-purpose computer.

[0153] Through the above description of the embodiments, those skilled in the art can clearly understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0154] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules or units is only a logical functional division, and other division methods may exist in actual implementation. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed. Furthermore, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms. Units described as separate components may or may not be physically separate; components shown as units may be one physical unit or multiple physical units, i.e., they may be located in one place or distributed in multiple different places. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0155] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiments of this application, in essence, or the part that contributes to general technology, or all or part of the technical solution, can be embodied in the form of a software product. This software product is stored in a storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0156] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for determining the permissible content of impurities in a medium, characterized in that, include: Obtain the theoretical wall thickness, historical transported media, historical operating time, and historical maintenance records of the transmission pipeline; The historical corrosion depth and target operating time of the transmission pipeline are determined based on the historical transported medium, the historical operating time, the historical maintenance records, and the target transported medium. The target corrosion rate is determined based on the target failure level, the theoretical wall thickness, the historical corrosion depth, and the target operating time. The failure level is used to indicate the probability of failure of the transmission pipeline. The target failure level is a preset failure level based on the application requirements of the transmission pipeline. The target corrosion rate is the corrosion rate that the transmission pipeline is allowed to operate within the target operating time. The permissible impurity content is determined based on the target corrosion rate; the permissible impurity content is the maximum impurity content that is allowed to exist in the target transport medium.

2. The method according to claim 1, characterized in that, The target corrosion rate satisfies the following formula: in, The target corrosion rate is h, the theoretical wall thickness is d1, the historical corrosion depth is t, the target running time is a, the power of the target running time is a, and the coefficient of the theoretical wall thickness is m. The value of m is positively correlated with the target failure level; the higher the target failure level, the greater the probability of failure of the transmission pipeline.

3. The method according to claim 2, characterized in that, When the target failure level is level one, the target corrosion rate satisfies the following formula: When the target failure level is level two, the target corrosion rate satisfies the following formula: When the target failure level is level three, the target corrosion rate satisfies the following formula: When the target failure level is level four, the target corrosion rate satisfies the following formula: in, Let h be the target corrosion rate, h be the theoretical wall thickness, d1 be the historical corrosion depth, t be the target operating time, and a be the power of the target operating time. , , The coefficient for the theoretical wall thickness. Less than ,and Less than When the target failure level is the first level, the probability of failure of the transmission pipeline is less than when the target failure level is the second level; when the target failure level is the second level, the probability of failure of the transmission pipeline is less than when the target failure level is the third level; when the target failure level is the third level, the probability of failure of the transmission pipeline is less than when the target failure level is the fourth level.

4. The method according to claim 1, characterized in that, Determining the permissible impurity content based on the target corrosion rate includes: To obtain the corresponding relationship between different impurity contents and pitting rates; When the pitting rate is less than or equal to the target corrosion rate, the impurity content corresponding to the pitting rate is determined as the permissible impurity content.

5. The method according to claim 1, characterized in that, The step of determining the historical corrosion depth and target operating time of the transmission pipeline based on the historical transported medium, the historical operating time, the historical maintenance records, and the target transported medium includes: The historical corrosion depth is determined based on the historical transported medium, the historical operating time, and the historical maintenance records; The target operating time is determined based on the historical corrosion depth and the target transport medium.

6. The method according to claim 5, characterized in that, Determining the historical corrosion depth based on the historical transport medium, the historical operating time, and the historical maintenance records includes: Obtain the first inherent corrosion rate of the historical transmission medium; The historical corrosion increment of the transmission pipeline is determined based on the first inherent corrosion rate and the historical operating time. Based on the historical maintenance records, determine the historical corrosion reduction of the transmission pipeline; The historical corrosion depth of the transmission pipeline is determined based on the historical corrosion increment and the historical corrosion reduction.

7. The method according to claim 5, characterized in that, The step of determining the target runtime based on the historical corrosion depth and the target transport medium includes: Obtain the operational requirements of the target transport medium and the second inherent corrosion rate of the target transport medium; The target operating time is predicted based on the historical corrosion depth, the operational requirements, and the second inherent corrosion rate.

8. A device for determining the permissible content of impurities in a medium, characterized in that, The device includes: a communication unit and a determination unit; The communication unit is used to acquire the theoretical wall thickness of the transmission pipeline, historical transported media, historical running time, and historical maintenance records. The determining unit is used to determine the historical corrosion depth and target operating time of the transmission pipeline based on the historical transport medium, the historical operating time, the historical maintenance records, and the target transport medium. The determining unit is further configured to determine the target corrosion rate based on the target failure level, the theoretical wall thickness, the historical corrosion depth, and the target operating time; the failure level is used to indicate the possibility of failure of the transmission pipeline, and the target failure level is a preset failure level based on the application requirements of the transmission pipeline; the target corrosion rate is the corrosion rate that the transmission pipeline is allowed to carry within the target operating time. The determining unit is further configured to determine the permissible impurity content based on the target corrosion rate; the permissible impurity content is the maximum impurity content that is allowed to exist in the target transport medium.

9. A device for determining the permissible content of impurities in a medium, characterized in that, include: A processor and a memory; wherein the memory is used to store one or more programs, the one or more programs including computer-executable instructions, wherein when the device is running, the processor executes the computer-executable instructions stored in the memory to cause the device to perform the method for determining the permissible content of media impurities as claimed in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, When the computer-executable instructions stored in the computer-readable storage medium are executed by the processor of the device for determining the permissible content of media impurities, the device for determining the permissible content of media impurities is capable of performing the method for determining the permissible content of media impurities as described in any one of claims 1 to 7.

11. A computer program product, characterized in that, The computer program product includes: a computer program or instructions that, when executed on a computer, cause the computer to perform the method for determining the permissible content of media impurities as described in any one of claims 1 to 7.

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