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CSME 2024/05
Volume 45 No.2
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103-113
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Numerical Analysis of the Flow in a Delayed Coker Unit Fractionator Overhead Vapor Line
Chun-Lang Yeha
aDepartment of Aeronautical Engineering, National Formosa University, Yunlin, Taiwan 63208, ROC.
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Abstract:
In this study, we applied computational fluid dynamics (CFD) to investigate the flow in a delayed coker unit (DCU) fractionator overhead vapor line connected to an air cooler. The causes of the pipe damage and the strategies to alleviate the occurrence of the damage are discussed. It is found that the flow direction of the working fluid in the 30” main pipe biases the downstream flow to the east side, which causes the east half part of the pipe system to deteriorate earlier than the west half part due to the larger erosion effect. Raising the 30” pipe does not improve the force uniformity. If the two 24” pipes are connected and the five 18” pipes are also connected, the force uniformity can be improved without raising the 30” pipe. In addition, the forces on caps, reducers and T-junctions all reduce if the two 24” pipes are connected and the five 18” pipes are also connected.
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Keywords: delayed coker unit, computational fluid dynamics, fractionator, force uniformity.
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*Corresponding author; e-mail:
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©
2024
CSME , ISSN 0257-9731
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