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| Simulation and Optimal Design of High-Pressure-Differential and High-Solid-Phase Relief Valves |
| (1.School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China; 2.Shanghai Yingchu Screw Mechanical Engineering Co., Ltd, Shanghai 200002, China; 3.Shanghai Research Institute of Chemical Industry, Shanghai 200062, China) |
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Abstract Relief valves used in the coal liquefaction equipment are running in an extremely harsh environment with extraordinarily high pressure differential and intensely slurry flow erosion. Based on the finite volume method (FVM), the pressure and flow distributions of relief valves were analyzed, with K-ε turbulence and Mixture multiphase model. Moreover, for the new-style relief valves, variations of pressure drops with valve apertures and turbulence intensities with depths of valve seat hole were studied. Considering the fluid-erosion theory, optimal design was accomplished and the easywearing positions of the relief valves were accurately predicted to provide theoretical basis for the choice of wear resistant materials. The application results show that the easy-wearing positions are coincide with the predictions. Moreover, the working lifetime is largely elongated up to 1 200 hours and suitable for the practical application.
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Received: 18 January 2011
Published: 30 November 2011
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