Long-distance pipeline coal conveying leakage detecting control system

Abstract

The invention discloses a long-distance pipeline coal conveying leakage detecting control system. A pressure wave propagation method has great advantages on the detection of major sudden leakage accidents and is mainly used in the pipeline conveying engineering of liquid such as crude oil at home and abroad. On the improvement basis, the pressure wave propagation method is used in the long-distance pipeline coal conveying leakage detecting control system. A plurality of experiment studies show that when the pressure wave propagation method is used for the long-distance coal conveying pipeline engineering, the following key technical indexes can be obtained: when the leakage flow rate of the warning is greater than 1.5 percent of the total flow rate, the positioning error of the leakage point can be controlled to be 0.97km in the length range of the detecting pipe section, when the leakage flow rate of the warning is greater than 1.2 percent of the total flow rate, the positioning error of the leakage point can be controlled to be 0.68km in the length range of the detecting pipe section, and the warning reaction time is 150s. The leakage detecting system has the major advantages that the leakage positioning error is small, the warning reaction time is short, and longer reaction time is realized in the pipeline transportation industry.

Description

[0001] technical field [0002] The invention relates to the field of pipeline transportation, in particular to automatic control of long-distance pipeline coal transportation leakage detection. Background technique [0003] Among the existing pipeline leakage detection methods, the detection speed of the volume (mass) flow balance method is slow, greatly affected by the accuracy of the flowmeter, and the positioning accuracy is poor; the real-time transient model method (RTTM) is too theoretical, and the model is not sensitive to external conditions. Poor adaptability to changes in leakage detection, low alarm reliability and positioning accuracy of leak detection; pressure wave detection technology has been used in pipeline transportation projects for oil and other liquids and has achieved certain successful experience. This detection technology has obvious advantages in detecting large sudden leakage accidents, but it has not been used in pipeline coal leakage detection p...

AI Technical Summary

Problems solved by technology

[0003] Among the existing pipeline leakage detection methods, the detection speed of the volume (mass) flow balance method is slow, greatly affected by the accuracy of the flowmeter, and the positioning accuracy is poor; the real-time transient model method (RTTM) is too theoretical, and the model is not sensitive to external conditions. Poor adaptability to changes in leakage detection, low alarm reliability and positioning accuracy of leak detection; pressure wave detection technology has achieved certain successful experience in pipeline transportation projects for oil and other liquids

This detection technology has obvious advantages in detecting large sudden leakage accidents, but there is no precedent for pipeline coal leakage detection

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