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DCS (distributed control system)-based quick fault finding method

A DCS system and fault finding technology, which is applied in the direction of liquid displacement machinery, pump testing, machine/engine, etc., can solve the problems of the company's production impact, cumbersome viewing of trend charts, and affecting the company's normal gas supply, so as to achieve safe and stable maintenance running effect

Active Publication Date: 2015-12-30
SICHUAN DESHENG GRP VANADIUM & TITANIUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The oxygen compressor has multiple interlocking shutdown conditions (such as temperature, pressure, vibration, etc. of each measurement point). When the oxygen compressor is shut down due to a fault, there are many interlocking shutdown parameters, and the DCS control system is used to monitor it. It is cumbersome to view trend graphs
In addition, the data collection cycle of the monitoring screen of the host computer is set to 1000ms, so that the host computer may not be able to collect the parameter values ​​at the time of shutdown, so that the cause of the shutdown of the oxygen compressor cannot be quickly judged, which increases the processing time of the fault problem
If the downtime failure cannot be recovered, the oxygen compressor is not allowed to start due to equipment safety considerations, which will seriously affect the company's normal gas supply and have a huge impact on the company's production

Method used

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  • DCS (distributed control system)-based quick fault finding method

Examples

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Comparison scheme
Effect test

Embodiment 1

[0025] The gas temperature at the outlet of the first stage of the compressor was shut down due to over-temperature of 160°C (the interlock shutdown threshold was higher than 154.3°C). After the existing DCS system issues a shutdown command to stop, if the outlet temperature of a section returns to the operating allowable condition, the color of the icon displayed on the monitoring interface will return from red to green, so that the cause of the shutdown cannot be judged from the monitoring screen. At present, the only way to find the fault is to stop the car and manually troubleshoot the faults one by one, which is a waste of time.

Embodiment 2

[0027] The present invention is applied to find faults of the oxygen compressor, and the gas temperature at the outlet of the first section of the compressor is overheated due to 160° C. (the interlock shutdown threshold is higher than 154.3° C.). After the DCS system sends a stop command to stop, since the fault signal remains unchanged, no matter how the temperature changes, the color of the icon displayed on the monitoring interface will remain red until it is manually reset. Technicians can quickly locate and determine the cause of the fault through the color prompt of the icon, thus greatly shortening the time for troubleshooting the fault.

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Abstract

The invention discloses a DCS (distributed control system)-based quick fault finding method which comprises the following steps: periodically acquiring a DCS signal input by an oxygen compressor, judging whether the input DCS signal achieves the interlock shutdown condition, if so, transmitting a shutdown command by the DCS system to control the oxygen compressor to shut down, and if not, continuing acquiring the DCS signal input by the oxygen compressor; and after the oxygen compressor is shut down, keeping the DCS signal finally acquired before the shutdown constant, and finding the fault cause. The monitor interface in the DCS system is provided with icons for displaying normality or faults, wherein the normality icon is green, and the fault icon is red. The method intuitively judges the fault cause according to the icon color for marking the fault in the monitor interface in the DCS system, thereby reducing the reasons for finding the fault causes.

Description

technical field [0001] The invention relates to the technical field of industrial automation, in particular to a method for quickly finding faults based on a DCS system. Background technique [0002] Oxygen turbine compressor (hereinafter referred to as oxygen compressor) in the oxygen generator is an important equipment for oxygen generator, with a rated power of 4000KW. It is used in the ironmaking and steelmaking industries and mainly provides medium and low pressure oxygen. [0003] The oxygen compressor has multiple interlocking shutdown conditions (such as temperature, pressure, vibration, etc. of each measurement point). When the oxygen compressor is shut down due to a fault, there are many interlocking shutdown parameters, and the DCS control system is used to monitor it. It is cumbersome to view trend graphs. In addition, the data collection cycle of the monitoring screen of the upper computer is set to 1000ms, so the upper computer may not be able to collect the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B51/00
Inventor 陈伟麦吉昌陈继科汪建平周平
Owner SICHUAN DESHENG GRP VANADIUM & TITANIUM CO LTD