Evaluation method of refining device parts prone to corrosion

An evaluation method and corrosion evaluation technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems that have not yet been reliably and scientifically evaluated

Inactive Publication Date: 2014-07-02
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, although most domestic petrochemical enterprises have adopted new corrosion monitoring technologies including online monitoring probes or other monitoring technologies, due to the particularity and complexity of corrosion itself, there is no reliable evaluation and selection of monitoring parts. , scientific evaluation method

Method used

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  • Evaluation method of refining device parts prone to corrosion
  • Evaluation method of refining device parts prone to corrosion
  • Evaluation method of refining device parts prone to corrosion

Examples

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Embodiment Construction

[0019] Take the newly built 1 million tons / year cracking unit as an example:

[0020] 1) Through the RBI risk analysis of 259 pieces of equipment and 5025 pipelines, it is determined that the main failure modes are: internal corrosion thinning, stress corrosion cracking and external corrosion. The internal corrosion thinning includes high-temperature sulfide corrosion, high-temperature H 2 S / H 2 Corrosion, corrosion and high temperature oxidation of wet hydrogen sulfide / carbon dioxide gas, stress corrosion cracking including wet H 2 Sulfide stress corrosion cracking, carbonate stress corrosion cracking and alkali stress corrosion cracking in S environment. High-temperature sulfide corrosion mainly occurs in the pyrolysis gas pipeline from the cracking furnace outlet to the 10-C-2701 oil washing tower in the cracking section; 2 S / H 2 Corrosion mainly occurs in the pyrolysis gas pipeline from the outlet of the cracking furnace in the cracking section to the 10-C-2701 oil scru...

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Abstract

The invention relates to an evaluation method of refining device parts prone to corrosion. The method includes: determining a main failure mode and a corresponding inspection plan by performing RBI risk analysis on equipment and pipelines; using HAZOP to perform formal, systematic and strict inspection on a newly-built or existing process device and project nature so as to evaluate the hazard possibility of a single device and possible influence on a whole set of device; using an LEC analyzing method to perform semi-quantitative safety evaluation on the hazard sources in an operation environment with potential hazard; analyzing and correlating the steps above to determine the parts prone to corrosion and corrosion processes so as to perform corrosion evaluation analysis and carry out preventive monitoring; comprehensively using the HAZOP, LEC and RBI analyzing methods to perform corrosion evaluation analysis on parts without evident corrosion problems so as to carry out preventive monitoring. The method is highly scientific, easy to use, high in evaluation accuracy and capable of effectively carrying out preventive monitoring.

Description

Technical field: [0001] The invention relates to a method for evaluating corrosion of refining and chemical equipment. Especially suitable for various refining and chemical enterprises, especially the evaluation of corrosion sites of key refining and chemical equipment (including distillation, coking, catalysis, coking, hydrocracking and cracking, styrene, styrene-butadiene rubber, aromatics, butene-1 equipment, etc.) . technical background: [0002] Due to the flammable and explosive raw materials of petrochemical enterprises, the entire processing system is huge and the process is complex, so the production process may inevitably cause fire or explosion, which will have a very large impact on life, national property, environment, safety production and enterprise benefits. Because the material contains strong corrosive media (acid, sulfur, etc.), these corrosive media are distributed in each process, link, and temperature range. The corrosive media is the key factor for st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 康强利赵敏马红杰孔朝辉黄新泉崔轲龙王帝王相儒王星明
Owner PETROCHINA CO LTD
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