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Impact Wear Prediction and Wall Thickness Monitoring of the Elbow Region in the Oil-Coal Slurry Pipeline

Author: FuLin
Tutor: GaoBingJun
School: Hebei University of Technology
Course: Chemical Process Equipment
Keywords: Oil and coal slurry Elbow Impact wear Ultrasonic wave Wall thickness monitoring
CLC: TQ055
Type: Master's thesis
Year: 2009
Downloads: 207
Quote: 1
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Abstract


High temperature high pressure and high solids holdup the fluid pipes wear problems are often very serious , in-depth study of the wall thickness of the wear law with a wall thickness of online monitoring , to lay a good foundation for the safety assessment of such pipes . Piping for coal liquefaction industry , the software Fluent seven different diameter , the the elbow bend diameter ratio parts of the flow field simulation , the distribution of the velocity field is obtained in the turbulent state . Wear model is embedded into the Fluent software secondary development , the wear prediction of the bending parts . The numerical results show that , bend diameter than different , wear elbow region and the amount of wear . The same diameter , with the bend diameter ratio increases , the maximum amount of wear is reduced. Piping economy, taking into account the bend diameter ratio of 4 to 6 is suitable . For serious wear and tear of high-temperature and high-pressure pipe wall thickness monitoring and evaluation is an important means to ensure the safe operation of the same probe and piping material to full penetration in the form of vertical welding parts in the pipeline monitoring probe the end portion of water-cooled , so that the end portion of the temperature reduces to the conventional ultrasonic probe can be used for measuring the thickness and coupling agent , in order to achieve the high-temperature high-pressure pipe wall thickness ultrasonic monitoring . The stainless steel material , for example , the round flat plate of the the soldering wave guide rod , straight tube , and the bending test piece was measured , the measurement results and the actual wall thickness value is preferably snugly . Round plate specimen the probe ends cooling device , the probe ends cooled to room temperature ; discussed the relationship between the temperature and the speed of sound of the thickness measurement system and measurement data correction method ; wall thickness of the projection results and the actual wall the thick good agreement to meet the high temperature and high pressure pipe wall thickness monitoring requirements .

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