| As a core equipment in methanol synthesis plant,the operation condition of methanol water cooler directly affect the quality of products and economic efficiency.In this paper,the vibration of the heat exchanger tube bundle is studied for the serious vibration and failure of the tube bundle during the working of the methanol water cooler in the synthesis section of a petrochemical company.In this paper,the parameters of the methanol water cooler were evaluated and the structural parameters were checked.The heat load of the methanol water cooler was estimated by Aspen Plus softwares,and the performance of the heat exchanger was simulated based on the heat exchanger design module.Due to the existence of its physical database in Aspen,the phase change analysis for the heat transfer process is more accurate than the conventional theory.The vibration of the heat exchanger tube bundle was calculated and analyzed based on the theoretical method of GB/T151 and HTFS simulation.The Carmen vortex excitation,turbulence buffeting and fluid elasticity were used as the calculation index,the vibration of water cooler was evaluated,and it was verified that the design defects of the original heat exchanger baffle plate were too large and the thickness of the baffle plate was insufficient.The design of the heat exchanger was put forward at the same time.The process caculation and vibration check was carried out.Finally,the modal analysis method is used to calculate the natural frequency and the first 6 th shapes,and the feasibility of the reconstruction is verified.The results show that the reforming scheme of methanol cooler can improve the vibration of the heat exchanger,and the heat transfer margin of the heat exchanger can be achieved by improving the arrangement of the heat transfer tube,the structure of the shell,the spacing and form of the baffle plate.It is proved that the heat allowance is sufficient and anti-vibration performance is excellent after the modification of heat exchanger. |
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