HAZOP analysis, SIL grading and verification tool and method

Abstract

The invention discloses an HAZOP analysis, SIL grading and verification tool and method, the tool comprises an HAZOP analysis module, an SIL grading module and an SIL verification module, the HAZOP analysis module realizes full-process management of project execution, the SIL grading module presets an SIL analysis table according to HAZOP analysis data, the SIL verification module automatically links to the SIL verification module for an SIF loop with an SIL grading result of SIL1 and above, and outputs a report after analysis. According to the method, the HAZOP analysis application program, the SIL grading application program, the SIL verification application program and the corresponding calling database are integrated, the HAZOP analysis application program, the SIL grading application program and the SIL verification application program can be independently used, the SIL grading application program, the SIL verification application program and the calling database can also be generated on the basis of HAZOP analysis content, then basic information of SIL verification is generated, the problem of repeated input of related content is solved, and user experience is improved. And meanwhile, a summarized data exporting form is selected in a user-defined mode, an analysis report template is set in a user-defined mode, report one-key output is supported, and the execution efficiency of the project is greatly improved. And the project data are retained in the tool, so that the learning requirements of subsequent personnel can be met, and resource sharing is fully realized.

Description

Technical Field

[0001] The invention belongs to the technical field of oil and gas equipment safety analysis, and in particular relates to a HAZOP analysis, SIL rating and verification tool and method. Background Art

[0002] Process safety analysis is an important part of process system risk identification and assessment. Common methods include Hazard and Operability Study (HAZOP), Layers of Protection Analysis (LOPA, used for SIL classification analysis) and SIL verification algorithm.

[0003] HAZOP is a structured and systematic review of the design or existing equipment, with the purpose of identifying and evaluating the risk of possible injury to personnel or property loss. The core of the method is the deviation composed of guide words + process parameters, discussing the causes of the deviation and the potential consequences of the deviation one by one, and giving reasonable risk control measures to ensure the safe operation of the equipment.

[0004] LOPA and HAZOP analysis are both process hazard analysis methods. Compared with the qualitative analysis of HAZOP, LOPA is a semi-quantitative hazard analysis method that can analyze the consequences and frequency of accident scenarios and determine whether it is necessary to add or change independent protection layers to reduce the risk of accident scenarios. During the analysis, the protection layer frequency data used is accurate to the order of magnitude. Usually, after the HAZOP analysis, the company conducts LOPA analysis for high-risk accident scenarios. LOPA is also an important tool for completing the SIL rating of each control loop of the Safety Instrument System (SIS).

[0005] SIL verification is to confirm whether the actual configuration of the SIF loop meets the requirements of SIL rating before purchasing SIS equipment, and adjust the design, procurement or safety management system according to the verification results. The SIL level depends on three factors: structural constraints, equipment system capabilities and the average probability of dangerous failure PFDavg when required. IEC61508 proposes to calculate PFDavg as a judgment standard for verifying whether the SIL level is met. The methods commonly used to calculate PFDavg are: reliability block diagram method, fault tree method and Markov model.

[0006] During the project, we have been using Excel spreadsheets as a recording tool. For large projects, the spreadsheets are too complex to link the contents of HAZOP analysis, SIL classification and SIL verification, which affects work efficiency. Moreover, most of the project experience is retained by the engineers themselves, making it difficult to share resources.

[0007] It can be seen that there is an urgent need for a HAZOP analysis, SIL rating and verification tool and method to help solve the problem. Summary of the invention

[0008] The problem to be solved by the present invention is to provide a HAZOP analysis, SIL rating and verification tool and method. The tool can not only realize the recording function of Excel tables and complete the recording work in the project analysis process, but also associate the contents of HAZOP analysis, SIL rating and SIL verification through the tool's embedded algorithm, avoid multiple writing of the same content, and improve work efficiency; at the same time, it supports input / output of project data, realizes the aggregation and sharing of team projects, and facilitates search and learning.

[0009] In order to solve the above technical problems, the technical solution adopted by the present invention is: a HAZOP analysis, SIL rating and verification tool, including a HAZOP analysis module, a SIL rating module and a SIL verification module.

[0010] The HAZOP analysis module realizes the whole process management of project execution. The execution procedures of the HAZOP analysis module include account and authority management, project management, database management, statistical analysis, report templates and file export;

[0011] The SIL rating module presets a SIL analysis table according to the HAZOP analysis data, and the SIL rating module execution program includes project preparation, SIL rating analysis, SIL rating result summary, suggested rectification summary, SIL rating result distribution map and resource management;

[0012] The SIL verification module automatically links the SIF loop with a SIL rating result of SIL1 or above to the SIL verification module, conducts analysis, and outputs a report.

[0013] Furthermore, a risk matrix is ​​set on the HAZOP analysis module.

[0014] Furthermore, the initial default content of the HAZOP analysis deviation is set on the HAZOP analysis module, retrieved through the deviation database, or the deviation is input according to actual needs.

[0015] Furthermore, the HAZOP analysis module forms a risk distribution diagram of initial risk and residual risk according to the HAZOP analysis result, and the risk distribution diagram is displayed as a matrix distribution, a pie chart distribution or a bar chart distribution according to project requirements.

[0016] Furthermore, after the SIL rating module completes the rating, a SIL rating result summary table, a pie chart, and a bar chart are formed.

[0017] Furthermore, the SIL verification module retrieves SIF circuits with levels of SIL1 and above in the SIL classification analysis, generates basic information for SIL verification, and uses the Markov model to verify whether the sensors, logic controllers, and final actuators in the interlocking circuit meet the SIL level requirements, and generates a SIL verification report with one click.

[0018] Furthermore, the present invention also provides a HAZOP analysis, SIL rating and verification method, using the above-mentioned HAZOP analysis, SIL rating and verification tool, including the following steps:

[0019] S1: Determine HAZOP analysis and SIL classification, that is, the accident scenario of SIF corresponds to the adverse consequences in HAZOP analysis, the initial event of SIF corresponds to the cause in HAZOP analysis, and the independent protection layer of SIF corresponds to the protection measures in HAZOP analysis;

[0020] S2: Determine the correspondence between SIL rating and SIL verification, that is, the SIF circuit information with SIL rating of SIL1 and above forms a SIL verification analysis table;

[0021] S3: Classify the protection measures in the HAZOP analysis to achieve accurate correspondence between the protection measures in the HAZOP analysis and the independent protection layers in the SIL classification analysis, that is, the alarm bit number corresponds to the key alarm and personnel response, the interlock bit number corresponds to the safety instrument function, and the safety valve / breathing valve bit number corresponds to the physical protection layer;

[0022] S4: In the SIL rating results, select SIF circuits with a rating of SIL1 or above, identify and split the sensors and execution actions in the SIF description content, and generate the SIF name and interlocking circuit diagram in the SIL verification table accordingly;

[0023] S5: Based on the correspondence between HAZOP analysis, SIL rating and verification, the data of HAZOP analysis, SIL rating and verification are linked.

[0024] Further, in said S3, the HAZOP analysis comprises the following steps:

[0025] S31: Create a new HAZOP analysis project;

[0026] S32: Select risk matrix;

[0027] S33: divide nodes;

[0028] S34: HAZOP deviation analysis;

[0029] S35: Statistical HAZOP analysis results;

[0030] S36: HAZOP analysis report generation and file export.

[0031] Further, in said S4, SIL classification includes the following steps:

[0032] S41: New SIL rated project;

[0033] S42: Select risk criteria;

[0034] S43: SIL rating analysis;

[0035] S44: SIL classification result statistics;

[0036] S45: SIL rating report generation and file export.

[0037] Furthermore, the SIL verification process of S4 includes the following steps:

[0038] S46: After the SIL rating is completed, a SIF circuit with a rating result of SIL1 or above is retrieved and judged, and the SIF circuit content is linked to generate a SIL verification table;

[0039] S47: Input failure probability values ​​of sensors, logic controllers, and actuator components according to project data, obtain verification results of the SIF loop, and confirm whether the SIL level meets the requirements from the verification results;

[0040] S48: Form a summary table of verification results and export the SIL verification report as a whole.

[0041] The advantages and positive effects of the present invention are:

[0042] The present invention integrates three applications such as HAZOP analysis, SIL rating, and SIL verification, as well as corresponding call databases. The three applications can be used separately, or they can use algorithms to automatically generate SIL ratings based on HAZOP analysis content, and automatically generate basic information for SIL verification based on SIL ratings, solving the problem of repeated input of related content. At the same time, it has the function of customizing the export summary data format, customizing the analysis report template, and supporting one-key report output, which greatly improves the execution efficiency of the project. Moreover, the project information can be retained in the tool, which can well meet the learning needs of subsequent personnel and fully realize resource sharing. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 1 is a flow chart of the HAZOP analysis program according to an embodiment of the present invention.

[0044] Figure 2 Schematic diagram of the HAZOP analysis interface according to an embodiment of the present invention.

[0045] Figure 3 LOPA analysis program flow chart of an embodiment of the present invention.

[0046] Figure 4 4 is a diagram showing the relationship between HAZOP information and LOPA information according to an embodiment of the present invention.

[0047] Figure 5 It is a schematic diagram of the SIL classification analysis interface of an embodiment of the present invention.

[0048] Figure 6 It is a schematic diagram of the SIL verification interface of an embodiment of the present invention. DETAILED DESCRIPTION

[0049] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0051] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] The embodiments of the present invention are further described below in conjunction with the accompanying drawings:

[0053] A HAZOP analysis, SIL rating and verification tool includes a HAZOP analysis module, a SIL rating module and a SIL verification module.

[0054] The HAZOP analysis module is a structured and systematic analysis of the device under design or the existing device to identify and evaluate the risk of possible personal injury or property loss. The execution procedures of the HAZOP analysis module include: account and authority management, project management, database management, statistical analysis, report templates and file export, realizing the full process management of project execution.

[0055] The SIL rating module uses the LOPA analysis method to analyze the consequences and frequency of accident scenarios to determine whether it is necessary to add or change independent protection layers to reduce the risk of accident scenarios. During the analysis, the protection layer frequency data used is accurate to the order of magnitude. The SIL rating module execution procedures include: project preparation, SIL rating analysis, SIL rating result summary, suggested rectification summary, SIL rating result distribution map and resource management. The SIL analysis table can be preset according to the HAZOP analysis data.

[0056] The SIL verification module is used to confirm whether the actual configuration of the SIF circuit meets the SIL rating requirements before purchasing safety instrument equipment, and adjust the design, procurement or safety management system according to the verification results. The SIL verification module automatically links the SIF circuit with a SIL rating of SIL1 or above to the SIL verification module, conducts analysis, and outputs a report.

[0057] Specifically, the present invention also provides a HAZOP analysis, SIL rating and verification method, using the above-mentioned HAZOP analysis, SIL rating and verification tool, including the following steps:

[0058] S1: Determine the HAZOP analysis and SIL classification, that is, the accident scenario of the SIF corresponds to the adverse consequences in the HAZOP analysis, the initial event of the SIF corresponds to the cause in the HAZOP analysis, and the independent protection layer of the SIF corresponds to the protection measures in the HAZOP analysis.

[0059] S2: Determine the correspondence between SIL rating and SIL verification, that is, the SIF circuit information with SIL rating of SIL1 and above forms a SIL verification analysis table.

[0060] S3: Classify the protection measures in the HAZOP analysis to achieve accurate correspondence between the protection measures in the HAZOP analysis and the independent protection layers in the SIL classification analysis, that is, the alarm bit number corresponds to the key alarm and personnel response, the interlock bit number corresponds to the safety instrument function, and the safety valve / breathing valve bit number corresponds to the physical protection layer.

[0061] Among them, Figure 1 As shown, HAZOP analysis includes the following steps:

[0062] S31: Create a new HAZOP analysis project and enter basic information such as project number, project name, owner, project overview, project time, etc.

[0063] S32: Select the risk matrix. You can set up the risk matrix according to national or corporate management requirements. Select the matrix applicable to this project in the data control. The system has risk matrices for large companies such as CNPC, Sinopec, and CNOOC. Select the corresponding risk matrix. If there is no applicable matrix for the execution project, you can also add or edit a new risk matrix.

[0064] S33: Divide the nodes. The HAZOP analysis interface is set with the input of node number, unit name, node description, design intent, P&ID drawing, meeting date, etc. The nodes are added and edited one by one, automatically sorted, and can be inserted. Preferably, the information of the participants is set, and the meeting secretary can fill it in according to the situation of the participants, which is convenient for the communication and implementation of subsequent key issues.

[0065] S34: HAZOP deviation analysis. HAZOP analysis deviation will set the initial default content, which can be retrieved through the deviation database, or input according to actual needs. It includes the input of parameters / guide words, detailed deviations, causes, consequences, initial risks, existing protection measures, residual risks, recommended measures, responsible parties, etc. The pre-set deviations are analyzed and recorded according to the results of node division. The causes and consequences of the same project can form historical data for use in other nodes of the project.

[0066] Specifically, in combination with specific embodiments, such as Figure 2In the table, you can see the input of parameters / guiding words (liquid level is too high), detailed deviation (oil phase liquid level in secondary separator is too high), causes (LIC-2011 control failure, P2001A / B / C failure shutdown), consequences (liquid level is too high, tank is full in serious cases, gas phase carries liquid, affecting the normal operation of fuel gas compressor, and equipment is damaged in extreme cases), initial risk (general risk), existing protection measures (LAHH2012 high-high interlock; LIC2011 and high alarm), residual risk (low risk), recommended measures, responsible parties, etc., and analyze and record the pre-set deviations according to the results of node division. The causes and consequences of the same project can form historical data for use by other nodes of this project.

[0067] S35: Statistics of HAZOP analysis results. The system automatically generates node summary table, recommendation item summary table, and residual risk distribution table / chart.

[0068] S36: HAZOP analysis report generation and file export, select the pre-edited report template, and automatically import the analysis results into the template. Including: node summary table and node quantity, suggestion summary table and suggestion quantity, risk statistics and distribution diagram, HAZOP analysis record table.

[0069] Specifically, the content of the HAZOP analysis table rows can be customized according to user needs to set the project parameter content in the table. The tool sets 35 project parameters including flow, liquid level, pressure, temperature, etc. Users can freely combine project parameters according to the analysis project requirements to form an analysis table with project characteristics.

[0070] The content of each column of the HAZOP analysis table can be customized according to user needs. The content set in this tool includes mandatory and optional items. The mandatory items include 4 items such as number, parameter, guide word, etc. The optional items include 17 items such as protection measures, recommended measures, and recommended categories. Users can personalize the HAZOP analysis table according to the actual needs of the project. At the same time, it has the function of importing Excel record sheets, and based on the relationship between HAZOP analysis and SIL analysis, it can automatically retrieve relevant information and generate a SIL rating record sheet.

[0071] Based on the HAZOP analysis results, a risk distribution diagram of initial risk and residual risk is formed. At the same time, three types of display, namely matrix distribution, pie chart distribution and bar chart distribution, can be selected according to project requirements, and the content export function is also available.

[0072] The suggestions made by the HAZOP analysis will form a suggestion summary table. At the same time, there will be a suggestion rectification status indicator based on the implementation of the suggestion items, as well as whether the completion time of the suggestion items has been delayed, which is convenient for tracking and has the function of exporting the suggestion content.

[0073] File export includes: node summary table, recommendation summary table, HAZOP analysis record table, risk statistics and distribution chart, etc. Statistics can be exported separately, and the report can be exported as a whole.

[0074] Among them, the node diagram divided by HAZOP analysis can be automatically summarized to form a node summary table containing node number, node name, node description, design intent and drawing number, and has the function of exporting node content.

[0075] Export file formats include word, pdf, excel, etc.

[0076] S4: In the SIL rating results, select SIF circuits with a rating of SIL1 and above, and generate SIF names and interlocking circuit diagrams in the SIL verification table by identifying and splitting the sensors and execution actions in the SIF description.

[0077] like Figure 3 , Figure 4 As shown, SIL rating includes the following steps:

[0078] S41: Create a new SIL rating project and enter basic information such as project number, project name, owner, project overview, project time, etc.

[0079] S42: Select risk standard. Select the applicable risk acceptance standard for this project in the database. If there is no applicable risk acceptance standard, add or edit a new risk acceptance standard.

[0080] S43: SIL rating analysis, including:

[0081] Basic information: automatically generated or manually entered - SIF loop information; accident scenario; initial event; select the consequence level for people, property and environment, and display the corresponding acceptable frequency.

[0082] Condition correction: Select applicable correction conditions and correction coefficients for the three types of consequences: personnel, property, and environment, and calculate the frequency of unabated events. The correction conditions include usage rate, ignition probability, personnel exposure frequency, mortality rate, and engineering experience.

[0083] Independent protection layer analysis: The independent protection layer of each SIF is described as the protection measure in the HAZOP analysis (the keyword is the interlocking position number in the HAZOP analysis protection measure, excluding the protection measure where the keyword is located). Select the type of independent protection layer, display the failure frequency, select the applicable consequence, and calculate the accident frequency after mitigation.

[0084] Analysis conclusion: The analysis conclusion of this SIF loop is the SIL level requirements for safety, property, environment, and reputation, and the highest level is taken as the SIL level of this SIF loop.

[0085] The analysis of this SIF loop is completed and the analysis of the next SIF loop is continued.

[0086] In combination with specific embodiments, such as Figure 5 As shown in the figure, the SIF loop information is automatically generated by identifying the interlocking bit number of the protection measures in the HAZOP analysis; including the initial event, accident scenario, key alarm, personnel response and physical protection layer, and correspondingly linked to the independent protection layer position of the SIL analysis table. According to the type of independent protection layer, the failure frequency is displayed, and the accident frequency after reduction is calculated by filling in the initial event frequency and conditionally correcting the probability of occurrence of each type of event.

[0087] The analysis conclusions of this SIF loop are the SIL level requirements for safety, property, environment, and reputation, and the highest level is taken as the SIL level of this SIF loop.

[0088] S44: Statistics of SIL rating results, including the following contents: SIF rating results summary table, recommendation item summary table, SIF rating results distribution table / chart, where the charts include pie charts or bar charts.

[0089] S45: SIL rating report generation and file export. Select the pre-edited report template, and the analysis results are automatically imported into the template, including: SIL rating result summary table and quantity, suggestion item summary table and suggestion quantity, SIL rating result distribution table / graph, SIL rating record table.

[0090] Specifically, after the SIL rating analysis table is completed, a SIL rating result summary table, pie chart, and bar chart are automatically generated. Figure 3 There are various forms, which can be selected according to project requirements, and it has the function of exporting content. It automatically forms a summary table of suggestions, and at the same time, it provides a suggestion rectification status indication based on the implementation of the suggestions, as well as whether the completion time of the suggestions has been delayed, which is convenient for tracking, and it has the function of exporting content. It also has the function of importing Excel records to achieve online and offline content communication. The SIL rating report has the function of generating it with one click.

[0091] File export: SIL rating result summary table, recommendation summary table, SIL rating result distribution table / chart, SIL rating record table and other statistics can be exported separately, and the report can be exported as a whole. The export file formats include: word, pdf, excel, etc.

[0092] The SIL verification process includes the following steps,

[0093] like Figure 6 As shown, after the SIL rating is completed, the SIF circuit whose rating result is SIL1 or above is retrieved and judged, and the SIF number, SIF description and other contents of the circuit are linked to generate a SIL verification table.

[0094] Then, based on the project data, the failure probability values ​​of components such as sensors, logic controllers, and actuators are input, and finally the verification results of the SIF loop are obtained. From the verification results, it can be seen whether the SIL level meets the requirements.

[0095] A summary table of verification results is formed to clearly show whether the verification circuit meets the SIL level requirements. The SIL verification report can be exported as a whole.

[0096] Specifically, based on the correlation between SIL classification and SIL verification, the SIF circuits with a level of SIL1 or above in the SIL classification analysis are automatically retrieved to generate basic information for SIL verification. The SIL verification uses the Markov model to verify whether the sensors, logic controllers, and final actuators in the interlocking circuit meet the SIL level requirements. The SIL verification report has a one-click generation function.

[0097] S5: Based on the correspondence between HAZOP analysis, SIL rating and verification, the data of HAZOP analysis, SIL rating and verification are linked.

[0098] The advantages and positive effects of the present invention are:

[0099] The present invention provides a HAZOP analysis, SIL rating and verification tool and method, which integrates three applications such as HAZOP analysis, SIL rating and SIL verification and a corresponding call database. The three applications can be used separately, and can also use algorithms to automatically generate SIL ratings based on HAZOP analysis content, and automatically generate basic information for SIL verification based on SIL ratings, solving the problem of repeated input of related content. At the same time, it has a custom selection of export summary data form, a custom setting analysis report template, and supports a one-key output report function, which greatly improves the execution efficiency of the project. Moreover, the project information can be retained in the tool, which can well meet the learning needs of subsequent personnel and fully realize resource sharing.

[0100] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A HAZOP analysis, SIL rating and verification tool, characterized by: Including HAZOP analysis module, SIL rating module and SIL verification module, The HAZOP analysis module realizes the whole process management of project execution. The execution procedures of the HAZOP analysis module include account and authority management, project management, database management, statistical analysis, report templates and file export; The SIL rating module presets a SIL analysis table according to the HAZOP analysis data, and the SIL rating module execution program includes project preparation, SIL rating analysis, SIL rating result summary, suggested rectification summary, SIL rating result distribution map and resource management; The SIL verification module automatically links the SIF loop with a SIL rating result of SIL1 or above to the SIL verification module, conducts analysis, and outputs a report.

2. A HAZOP analysis, SIL rating and verification tool according to claim 1, characterized in that: A risk matrix is ​​set on the HAZOP analysis module.

3. A HAZOP analysis, SIL rating and verification tool according to claim 1 or 2, characterized in that: The initial default content of the HAZOP analysis deviation is set on the HAZOP analysis module, retrieved through the deviation database, or inputted according to actual needs.

4. A HAZOP analysis, SIL rating and verification tool according to claim 1 or 2, characterized in that: The HAZOP analysis module forms a risk distribution diagram of initial risk and residual risk according to the HAZOP analysis result. The risk distribution diagram is displayed as a matrix distribution, a pie chart distribution or a bar chart distribution according to project requirements.

5. A HAZOP analysis, SIL rating and verification tool according to claim 1 or 2, characterized in that: After the SIL rating module completes the rating, a SIL rating result summary table, a pie chart, and a bar chart are formed.

6. A HAZOP analysis, SIL rating and verification tool according to claim 1 or 2, characterized in that: The SIL verification module retrieves the SIF circuits with levels of SIL1 and above in the SIL classification analysis, generates basic information for SIL verification, and uses the Markov model to verify whether the sensors, logic controllers, and final actuators in the interlocking circuit meet the SIL level requirements, and generates a SIL verification report with one click.

7. A HAZOP analysis, SIL rating and verification method, using a HAZOP analysis, SIL rating and verification tool according to any one of claims 1 to 6, characterized in that: The following steps are included: S1: Determine HAZOP analysis and SIL classification, that is, the accident scenario of SIF corresponds to the adverse consequences in HAZOP analysis, the initial event of SIF corresponds to the cause in HAZOP analysis, and the independent protection layer of SIF corresponds to the protection measures in HAZOP analysis; S2: Determine the correspondence between SIL rating and SIL verification, that is, the SIF circuit information with SIL rating of SIL1 and above forms a SIL verification analysis table; S3: Classify the protection measures in the HAZOP analysis to achieve accurate correspondence between the protection measures in the HAZOP analysis and the independent protection layers in the SIL classification analysis, that is, the alarm bit number corresponds to the key alarm and personnel response, the interlock bit number corresponds to the safety instrument function, and the safety valve / breathing valve bit number corresponds to the physical protection layer; S4: In the SIL rating results, select SIF circuits with a rating of SIL1 or above, identify and split the sensors and execution actions in the SIF description content, and generate the SIF name and interlocking circuit diagram in the SIL verification table accordingly; S5: Based on the correspondence between HAZOP analysis, SIL rating and verification, the data of HAZOP analysis, SIL rating and verification are linked.

8. A HAZOP analysis, SIL rating and verification method according to claim 7, characterized in that: In said S3, the HAZOP analysis includes the following steps, S31: Create a new HAZOP analysis project; S32: Select risk matrix; S33: divide the node; S34: HAZOP deviation analysis; S35: Statistical HAZOP analysis results; S36: HAZOP analysis report generation and file export.

9. A HAZOP analysis, SIL rating and verification method according to claim 7 or 8, characterized in that: In said S4, SIL classification includes the following steps: S41: New SIL rated project; S42: Select risk criteria; S43: SIL rating analysis; S44: SIL classification result statistics; S45: SIL rating report generation and file export.

10. A HAZOP analysis, SIL rating and verification method according to claim 7 or 8, characterized in that: The SIL verification process of S4 is as follows: The following steps are included: S46: After the SIL rating is completed, a SIF circuit with a rating result of SIL1 or above is retrieved and judged, and the SIF circuit content is linked to generate a SIL verification table; S47: Input failure probability values ​​of sensors, logic controllers, and actuator components according to project data, obtain verification results of the SIF loop, and confirm whether the SIL level meets the requirements from the verification results; S48: Form a summary table of verification results and export the SIL verification report as a whole.

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