Method and software platform for calculating residual life of atmospheric vertical storage tank

Abstract

The present application relates to a kind of atmospheric vertical storage tank residual life calculation method and software platform, the atmospheric vertical storage tank residual life calculation method includes: to the inspection item is graded one by one;The score of the item of the same class item is calculated;Project score is input into software platform, meanwhile, the case of storage tank is input into software platform;Software platform follows the score of project and the case of storage tank and calculates the residual life of storage tank under single item score;Software platform judges whether to retain this result according to the calculation result of the residual life of storage tank;Software platform calculates the weight of each score item;Software platform combines the residual life of storage tank under single item score with the weight result of each score item and calculates the final residual life prediction result of storage tank.The present application quantifies inspection information, avoids the uncertainty of manual prediction;Storage tank life is predicted from multiple angles, and the prediction result is more stable;Scoring item is highly consistent with the item specified in the standard, which is convenient for inspectors to use.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of computing software, in particular to a kind of atmospheric vertical storage tank residual life calculation method and software platform. BACKGROUND

[0002] With the development of petrochemical industry, atmospheric vertical storage tank is widely used.Atmospheric vertical storage tank in service, it needs to be periodically inspected, and periodic inspection often needs to shut down production, clean tank, detect and repair, this process needs several months to complete, and spends a lot of economic cost.Therefore, the life of atmospheric vertical storage tank should be predicted, and the inspection cycle of the tank is optimized.

[0003] Currently, periodic inspection is mainly based on the actual corrosion rate of tank body in early stage, and considering the storage medium, operating conditions and other factors, the minimum residual thickness of the tank at next inspection is calculated and compared with the standard allowable thickness, to determine the next inspection time.This method has two disadvantages, first, the test point position determined by the inspector when measuring the current plate thickness may avoid the most serious corrosion area, which causes the calculated next inspection time to be too long.Second, the operating conditions considered have great uncertainty, which causes the calculated next inspection time to have a large fluctuation range.

[0004] Therefore, according to the actual situation, it is necessary to design a calculation method for predicting the life of the tank from the perspective of all-round inspection. SUMMARY

[0005] In view of the above-mentioned shortcomings of the prior art, the tank life calculation method provided by the present application makes full use of the inspection information of the tank, quantifies the inspection information, and avoids the uncertainty of manual prediction;The life of the tank is predicted from multiple angles, which is more stable than the prediction result from the bottom plate corrosion angle;The set score items are highly consistent with the standard specified periodic inspection items, which is convenient for the inspector to use.

[0006] To achieve the above object and other related objects, the present application provides a normal pressure vertical storage tank residual life calculation method and software platform, the calculation method comprising scoring each item in the inspection process of the normal pressure vertical storage tank according to the inspection result; calculating the score of the same type item according to the score of each item; inputting the item score into the software platform, and inputting the known score and residual life storage tank case sample into the software platform; and the software platform calculating the final residual life prediction result of the storage tank. The scoring of each item in the inspection process of the normal pressure vertical storage tank according to the inspection result, the listed items are highly consistent with the standard specified opening tank inspection items, which is convenient for the inspector to score, the score of the item has specific scoring criteria, and the score difference of different inspectors can be prevented; the score of the same type item is calculated according to the score of each item, the number of items is large and can be classified, the same type items are divided into the same project, and finally ten projects are obtained, the score of each project is calculated according to the score of the item; the item score is input into the software platform, and the known score and residual life storage tank case sample are input into the software platform, the software platform establishes a connection between the received data and the probability model, and prepares for the next step of calculating the residual life probability of the storage tank; the software platform calculates the final residual life prediction result of the storage tank, the software platform calculates the prediction life of the storage tank under the condition of each item score and the weight of each item according to the item score information of the known and unknown life storage tank and the life information of the known life storage tank, and determines whether to retain the item according to the calculation result, and finally calculates the final life prediction result of the storage tank by using the retained life prediction result and the item weight.

[0007] According to the atmospheric vertical storage tank remaining life calculation method and software platform, wherein: the inspection items include tank area condition inspection, foundation inspection, tank bottom inspection, tank wall inspection, tank top inspection, accessory inspection, magnetic flux leakage detection or low frequency electromagnetic detection of middle web plate, magnetic flux leakage detection or low frequency electromagnetic detection of edge plate, acoustic emission detection, tank bottom plate thickness measurement, tank wall plate thickness measurement, tank top plate thickness measurement, large angle weld ultrasonic or phased array or TOFD detection or ray or vacuum leak detection or kerosene leak detection or magnetic powder detection or penetration detection or pulse eddy current detection, tank bottom plate T-shaped weld ultrasonic or phased array or TOFD detection or ray or vacuum leak detection or kerosene leak detection or magnetic powder detection or penetration detection or pulse eddy current detection, wall plate T-shaped weld ultrasonic or phased array or TOFD detection or ray or vacuum leak detection or kerosene leak detection or magnetic powder detection or penetration detection or pulse eddy current detection, nozzle and accessory weld ultrasonic or phased array or TOFD detection or ray or vacuum leak detection or kerosene leak detection or magnetic powder detection or penetration detection or pulse eddy current detection, tank body ovality detection, tank body perpendicularity detection, storage tank foundation settlement detection, tank bottom plate settlement detection, wall plate metallographic inspection, weld metallographic inspection, weld heat affected zone metallographic inspection. The score of a specific item is between 75 and 100 if the item meets the standard requirements and the condition is very good, between 50 and 75 if the item meets the standard requirements but the condition is general, between 25 and 50 if the item does not meet the standard requirements but the condition is general, and between 0 and 25 if the item does not meet the standard requirements and the condition is very poor. In addition, if an item is not present in the field detection, 100 points are given; if an item is lost, 0 points are given; and if an item is not detected, the score is given according to the overall condition of the storage tank. The known life and unknown life storage tanks are scored item by item.

[0008] According to the atmospheric vertical storage tank remaining life calculation method and software platform, wherein: the items include macroscopic inspection, magnetic flux leakage detection or low frequency electromagnetic detection, acoustic emission detection, thickness measurement, ultrasonic or phased array or TOFD detection or ray or vacuum leak detection or kerosene leak detection or magnetic powder detection or penetration detection or pulse eddy current detection, tank body ovality, tank body perpendicularity, tank foundation settlement, tank bottom plate settlement, metallographic inspection. The sum of the coefficients of the items under a single item is 1, which ensures that the item score is between 0 and 100.

[0009] According to the atmospheric vertical storage tank remaining life calculation method and software platform, wherein: the item scores are input into the software platform, and the known score and remaining life storage tank case samples are input into the software platform, and the scores of each item of the unknown life storage tank are manually input through the item score input window of the software platform, and the scores of each item of the known life storage tank and the life are taken as samples and input through the case sample input window of the software platform.

[0010] According to the atmospheric pressure vertical storage tank residual life calculation method and the software platform, the software platform receives the life information of the known life storage tank, defines the life of different years as different events, receives the scoring conditions of each item of the known and unknown life storage tank, divides the item scoring into four levels: 0-25, 25-50, 50-75, 75-100, defines the four levels as four events, thereby establishing the connection between the item scoring and the probability model, and preparing for the next step of the storage tank residual life probability calculation.

[0011] According to the atmospheric pressure vertical storage tank residual life calculation method and the software platform, the software platform calculates the predicted life of the storage tank under the condition of each item scoring according to the item scoring information of the known and unknown life storage tank and the life information of the known life storage tank through the conditional probability model, when the sample space is small, part of the items cannot calculate the predicted life of the storage tank, therefore, after the life of the storage tank is calculated, it is judged whether there is a result output, if there is a result output, the result is reserved, if there is no result output, the item is abandoned in this calculation, the correlation coefficient between each item scoring and the life of the storage tank is calculated according to the item scoring information and the life information of the known life storage tank through the correlation coefficient model, each item is given a corresponding weight according to the correlation coefficient, and finally the final life prediction of the storage tank is calculated by using the reserved life prediction result and the item weight.

[0012] According to the atmospheric pressure vertical storage tank residual life calculation method and the software platform, the software platform has an item scoring input and display window, a case sample input and display window, a user login window, a storage tank life prediction display window, a weight display window, a final life prediction display window, an automatic evaluation report generation function and an automatic historical evaluation result saving function.

[0013] According to the atmospheric pressure vertical storage tank residual life calculation method and the software platform, the residual life prediction result of the storage tank is a curve containing probability information and life information. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 A structure schematic diagram of the storage tank residual life calculation method of the present application is shown.

[0015] Figure 2 A structure schematic diagram of the single item score calculation method of the present application is shown.

[0016] Figure 3 A structure schematic diagram of the storage tank residual life software platform of the present application is shown. DETAILED DESCRIPTION

[0017] Following, the embodiments of the present application will be described in detail by specific examples. Other advantages and effects of the present application can be easily understood by those skilled in the art from this disclosure. The present application can also be implemented or applied by other different embodiments, and various modifications or changes can be made to the details in this specification based on different views and applications without departing from the spirit of the present application.

[0018] With reference to Figure 1 The calculation method of the present application is generally divided into four steps: scoring each item in the inspection process of the atmospheric vertical storage tank according to the inspection results 1; calculating the score of the project in which the same type of item is located according to the score of each item 2; inputting the project score into the software platform, and inputting the known score and the remaining life of the storage tank case sample into the software platform 3; the software platform calculates the final remaining life prediction result of the storage tank 4.

[0019] Scoring each item in the inspection process of the atmospheric vertical storage tank according to the inspection results 1. The inspection items include tank area condition inspection, foundation inspection, tank bottom inspection, tank wall inspection, tank top inspection, accessory inspection, magnetic flux detection or low frequency electromagnetic detection of mid-plate, magnetic flux detection or low frequency electromagnetic detection of edge plate, acoustic emission detection, tank bottom plate thickness measurement, tank wall plate thickness measurement, tank top plate thickness measurement, large angle weld ultrasonic or phased array or TOFD detection or X-ray or vacuum leak test or kerosene leak test or magnetic powder detection or penetration detection or pulse eddy current detection, tank bottom plate T-type weld ultrasonic or phased array or TOFD detection or X-ray or vacuum leak test or kerosene leak test or magnetic powder detection or penetration detection or pulse eddy current detection, wall plate T-type weld ultrasonic or phased array or TOFD detection or X-ray or vacuum leak test or kerosene leak test or magnetic powder detection or penetration detection or pulse eddy current detection, nozzle and accessory weld ultrasonic or phased array or TOFD detection or X-ray or vacuum leak test or kerosene leak test or magnetic powder detection or penetration detection or pulse eddy current detection, tank body ovality detection, tank body perpendicularity detection, storage tank foundation settlement detection, tank bottom plate settlement detection, wall plate metallographic inspection, weld metallographic inspection, weld heat affected zone metallographic inspection. The specific item scoring, the score should be between 75 to 100 if it meets the standard requirements and the situation is very good, the score should be between 50 to 75 if it meets the standard requirements but the situation is general, the score should be between 25 to 50 if it does not meet the standard requirements but the situation is general, and the score should be between 0 to 25 if it does not meet the standard requirements and the situation is very poor. In addition, this article refers to the item, which does not exist in the field detection, and scores 100 points; this article refers to the item, which should exist in the field but is lost, and scores 0 points; this article refers to the item, which is not implemented in the detection, and scores according to the overall situation of the storage tank. The scoring of each item is performed for both known life and unknown life storage tanks.

[0020] The score of the same type of item in the project is calculated according to the score of each item, and the project includes macro inspection, magnetic flux leakage detection or low frequency electromagnetic detection, acoustic emission detection, thickness measurement, ultrasonic or phased array or TOFD detection or X-ray or vacuum leak detection or kerosene leak detection or magnetic particle detection or penetration detection or pulse eddy current detection, tank body ovality, tank body verticality, tank foundation settlement, tank bottom plate settlement, metallographic examination. Figure 2 , The sum of the coefficients of the items under a single project is 1, so that the score of the project is ensured to be between 0 and 100. In this way, the scores of each project of the storage tank with known life and unknown life are obtained.

[0021] The project scores are input into the software platform, and the storage tank case samples with known scores and remaining life are input into the software platform 3. The scores of each project of the storage tank with unknown life are manually input through the project score input window of the software platform, and the scores of each project and the life of the storage tank with known life are input as samples through the case sample input window of the software platform.

[0022] The software platform calculates the final remaining life prediction result of the storage tank 4. Refer to Figure 3 The software platform receives the life information of the storage tank with known life, defines the life of different years as different events, receives the scores of each project of the storage tank with known and unknown life, divides the project scores into four grades: 0-25, 25-50, 50-75, and 75-100, defines the four grades as four events, and establishes the connection between the project scores and the probability model, so as to prepare for the next step of calculating the probability of the remaining life of the storage tank.

[0023] The software platform calculates the predicted life of the storage tank under the condition of the scores of each project according to the score information of each project of the storage tank with known and unknown life and the life information of the storage tank with known life through the conditional probability model. When the sample space is small, part of the projects cannot calculate the life prediction result of the storage tank, so whether there is a result output is judged after the life of the storage tank is calculated. If there is a result output, the result is retained, and if there is no result output, the item is abandoned in this calculation. The correlation coefficient between each score and the life of the storage tank is calculated according to the score information of each project and the life information of the storage tank with known life through the correlation coefficient model, the corresponding weight of each item is given according to the correlation coefficient, and finally the final life prediction of the storage tank is calculated by using the retained life prediction result and the project weight.

[0024] In summary, the storage tank life calculation method provided by the application makes full use of the inspection information of the storage tank, quantifies the inspection information through scoring, establishes the connection between the score and the probability model by dividing the score into different events, and calculates the predicted life of the storage tank by using the conditional probability model and the correlation coefficient model.

[0025] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not intended to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed by the present application should be covered by the claims of the present application.

[0026] Advantages of the present application

[0027] 1. The present application provides a normal-pressure vertical storage tank residual life prediction method, which is beneficial to optimize the storage tank inspection cycle and avoid unnecessary waste;

[0028] 2. The storage tank life calculation method provided by the present application fully utilizes the inspection information of the storage tank, quantifies the inspection information, and avoids the uncertainty of manual prediction;

[0029] 3. The storage tank life is predicted from multiple angles, and the prediction result is more stable compared with the single bottom plate corrosion angle;

[0030] 4. The set score items are highly consistent with the standard regular inspection items, and are convenient for the inspectors to use.

Claims

1. A method for calculating the residual life of an atmospheric vertical storage tank, characterized by: The atmospheric vertical storage tank residual life calculation method comprises scoring each item in the inspection process of the atmospheric vertical storage tank according to the inspection results; the scores of each item are used to calculate the scores of the items in the same category; the item scores are input into a software platform, and the known scores and residual life storage tank case samples are also input into the software platform; the software platform calculates the residual life of the storage tank under the single item score according to the item scores and the storage tank case samples; the software platform determines whether to retain the result according to the calculation result of the residual life of the storage tank; the software platform calculates the weight of each score item according to the known scores and residual life storage tank case samples; The software platform combines the residual life of the storage tank under the single item score with the weight of each score item to calculate the final residual life prediction result of the storage tank; the inspection items include tank area condition inspection, foundation inspection, tank bottom inspection, tank wall inspection, tank top inspection, accessory inspection, magnetic flux leakage detection or low-frequency electromagnetic detection of the middle web plate, magnetic flux leakage detection or low-frequency electromagnetic detection of the edge plate, acoustic emission detection, tank bottom plate thickness measurement, tank wall plate thickness measurement, tank top plate thickness measurement, large-angle weld ultrasonic or phased array or TOFD detection or X-ray or vacuum leak detection or kerosene leak detection or magnetic powder detection or penetration detection or pulse eddy current detection, tank bottom plate T-shaped weld ultrasonic or phased array or TOFD detection or X-ray or vacuum leak detection or kerosene leak detection or magnetic powder detection or penetration detection or pulse eddy current detection, wall plate T-shaped weld ultrasonic or phased array or TOFD detection or X-ray or vacuum leak detection or kerosene leak detection or magnetic powder detection or penetration detection or pulse eddy current detection, nozzle and accessory weld ultrasonic or phased array or TOFD detection or X-ray or vacuum leak detection or kerosene leak detection or magnetic powder detection or penetration detection or pulse eddy current detection, tank body ovality detection, tank body perpendicularity detection, storage tank foundation settlement detection, tank bottom plate settlement detection, wall plate metallographic inspection, weld metallographic inspection, weld heat-affected zone metallographic inspection; the items include macroscopic inspection, magnetic flux leakage detection or low-frequency electromagnetic detection, acoustic emission detection, thickness measurement, ultrasonic or phased array or TOFD detection or X-ray or vacuum leak detection or kerosene leak detection or magnetic powder detection or penetration detection or pulse eddy current detection, tank body ovality, tank body perpendicularity, tank foundation settlement, tank bottom plate settlement, metallographic inspection.

2. A software platform for performing the atmospheric vertical storage tank residual life calculation method according to claim 1, characterized in that: The software platform has an item score input and display window, a case sample input and display window, a user login window, a storage tank life prediction display window, a weight display window, a final life prediction display window, an automatic evaluation report generation function, and an automatic historical evaluation result saving function.

3. A software platform for performing the method of calculating the remaining life of an atmospheric vertical storage tank according to claim 1, characterized by: The software platform uses a conditional probability model to combine the storage tank case samples and the scores of each item, divides the scores into grades, and defines different events; the conditional probability model is used to calculate the predicted residual life of the storage tank under the condition of each item score.

4. A software platform for performing the atmospheric vertical storage tank residual life calculation method according to claim 1, characterized in that: The software platform determines whether to retain the result and the corresponding weight according to the calculation result of the residual life of the storage tank.

5. A software platform for performing the atmospheric vertical storage tank residual life calculation method according to claim 1, characterized in that: The software platform uses a correlation coefficient calculation method to combine tank case samples to calculate the correlation of each item with the remaining life of the tank, and to determine the weight of each scoring item accordingly.

6. A software platform for performing the atmospheric vertical storage tank residual life calculation method according to claim 1, characterized in that: The software platform combines the remaining life of the tank under the single item score with the weight of each scoring item to calculate the final remaining life of the tank.

7. A software platform for performing the atmospheric vertical storage tank residual life calculation method according to claim 1, characterized in that: The known scoring and remaining life tank case samples are derived from the inspection reports and maintenance records of numerous tanks.

8. A software platform for performing the atmospheric vertical storage tank residual life calculation method according to claim 1, characterized in that: The remaining life prediction result of the tank is a curve containing probability information and life information.

Images