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Method for analyzing composition of unknown corrosion object of oil refining device

A technology of an oil refining unit and an analysis method, which is applied in the field of analyzing the composition of corrosion unknown substances in an oil refining unit, and achieves the effects of huge economic benefits and avoiding unplanned shutdown of the oil refining unit

Pending Publication Date: 2021-02-19
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is currently no analytical method that can detect the composition of the unknown

Method used

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  • Method for analyzing composition of unknown corrosion object of oil refining device
  • Method for analyzing composition of unknown corrosion object of oil refining device
  • Method for analyzing composition of unknown corrosion object of oil refining device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Take the abnormal operation of the centrifugal compressor of the C2 recovery unit, resulting in unplanned shutdown as an example:

[0022] The pressure at the third-stage inlet of the centrifugal compressor has risen, and the third-stage outlet has continued to decline. It is speculated that the impeller of the compressor is corroded and blocked. Stop for maintenance, analyze the composition of unknown substances in the impeller, and explore its cause. The specific steps are as follows: figure 1 Shown:

[0023] 1. Carry out energy spectrum analysis on unknown substances, and initially analyze the composition of unknown substances

[0024] Using energy spectrum analysis, 5 points were taken for analysis respectively, and the results are shown in Table 1:

[0025] Table 1 Energy spectrum analysis results

[0026] element 1 2 3 4 5 average C 1.64 2.42 2.98 3.66 2.09 2.958 O 0.86 0.27 0.84 0.02 0.33 0.264 S 89.93 89.23 89.72 84...

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Abstract

The invention relates to a method for analyzing the composition of an unknown corrosion object of an oil refining device, in particular to a working method for analyzing the unknown corrosion object of the oil refining device, which comprises the following specific steps of (1) carrying out energy spectrum analysis on the unknown object, (2) carrying out X-ray fluorescence spectrum analysis on anunknown object, (3) carrying out C / H / S / N element analysis on an unknown object, (4) performing X-ray diffraction analysis on an unknown object, (5) combining the four results to determine the composition of an unknown object, (6) knowing the flow of the device, the position of a generation part of an unknown object, material composition and operation parameters, and (7) finally, determining the rationality of the composition of the unknown object, and determining the formation reason of the unknown object. Aiming at the complexity of raw material processing of the oil refining device, the working method can accurately find out the reason for unplanned shutdown of the device in a short time, avoids unplanned shutdown of the oil refining device due to the same reason, and has huge potentialeconomic benefits.

Description

technical field [0001] The invention relates to an analysis method for the composition of unknown corrosion substances in an oil refinery. Background technique [0002] As the proportion of imported crude oil continues to increase, the crude oil processed by atmospheric and vacuum units tends to be diversified and inferior, and the proportion of high-sulfur and high-chlorine crude oil continues to rise, and the equipment is facing unprecedented anti-corrosion pressure. Chlorides and sulfides contained in crude oil are thermally decomposed or hydrolyzed during the distillation process to produce hydrogen chloride and hydrogen sulfide, which, together with organic acids in crude oil, cause serious corrosion to equipment and pipelines, affecting the normal operation of the device. At the end of 2018, in the C2 recovery unit of Sinopec Tianjin Branch, the inlet pressure of the third stage of the centrifugal compressor rose, and the outlet of the third stage continued to drop. T...

Claims

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Application Information

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IPC IPC(8): G01N23/20G01N23/223G01N33/28
CPCG01N23/223G01N23/20G01N33/2835G01N33/287G01N2223/056G01N2223/076G01N2223/1016G01N2223/637
Inventor 崔蕊侯志忠孙学峰刘嫘李鹤王连超白震王彤剧海峰
Owner CHINA PETROLEUM & CHEM CORP