RBI dynamic correction method based on fault analysis

A dynamic correction and fault analysis technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as frequent faults, no consideration of real-time status of equipment, low risk level, etc.

Active Publication Date: 2014-01-01
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, traditional RBI risk assessment is a static approach that does not take into account the real-time status of equipment operations
In the actual RBI risk assessment, it is found that in many cases, although the risk level of some equipment is not high (such as low risk or medium risk), failures occur frequently

Method used

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  • RBI dynamic correction method based on fault analysis
  • RBI dynamic correction method based on fault analysis
  • RBI dynamic correction method based on fault analysis

Examples

Experimental program
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Effect test

Embodiment Construction

[0025] Taking an implementation case in a petrochemical enterprise as an example, the present invention, the dynamic correction method of RBI based on failure analysis, is further explained.

[0026] Take the demethanizer (DA-301N: nominal wall thickness 16mm, design pressure 0.81Mpa, diameter 2400mm, design temperature -32℃, measured minimum wall thickness 15.6mm, corrosion rate 0.03mm / year) of an ethylene cracking unit as an example, RBI The risk assessment obtained the risk level of the equipment as low risk. In this example, the "recent" of the time node for the dynamic correction of the RBI for the failure analysis of the equipment is the most recent 6 months.

[0027] When a new failure occurs in the demethanizer, the failure record is added to the equipment data monitoring system, and the equipment's failure statistics are shown in Table 4.

[0028] Table 4 Recent (6 months) breakdown statistics

[0029]

[0030]

[0031] The division rules of the severity of failure consequen...

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PUM

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Abstract

The invention discloses a RBI dynamic correction method based on fault analysis. The method includes counting faults occurring recently, calculating to acquire a RPN (risk priority number), and determining a recent equipment fault risk level according to the risk priority number; correcting an equipment RBI fault risk level according to the recent equipment fault risk level. By the aid of the method, dynamic correction of a RBI risk can implemented, that is to say, once a new fault occurs, the RBI risk is updated immediately; RBI risk detection means that limited detecting resources are applied to high-risk and medium-high-risk equipment preferentially; recent fault influences are reflected to the equipment risk level, and the problem that the RBI risk detection cannot reflect recent equipment faults is solved.

Description

Technical field [0001] The invention belongs to the technical field of petrochemical equipment safety risk assessment, and specifically relates to a method for fault analysis and risk assessment of petrochemical static equipment. Background technique [0002] RBI (Risk-Based Inspection) is a method of optimizing inspection strategy established on the basis of the concept of pursuing the unity of system security and economy. Its essence is to analyze and rank the possibility and consequences of dangerous events, and discover The main problems and weaknesses ensure intrinsic safety while reducing operating costs. The most important purpose of RBI is to improve the inspection methods of petrochemical equipment, avoid major accidents, and improve the safety of the equipment; ensure the long-term stable operation of the equipment and improve the reliability of the equipment; rationally allocate maintenance and inspection resources to reduce risks and equipment Maintenance costs, to a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 刘学军李翔徐新艳陆淑娟
Owner NANJING UNIV OF TECH
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