关键词: 筛板, 高速气体, 数值模拟, 应力分布

Abstract: High-speed gas caused multiple operational failures in industrial distillation and absorption columns. Many operations in chemical industry production are likely to produce high-speed gas，such as the startup and shutdown，the purging of columns，the connection of equipment with different operating pressure，and the pressure release of system. This research used finite-element method to analyze the effects of gas velocity of the holes，opening ratio and hole diameter on the stability of a sieve tray. The comparison of the results between simulation and experiments demonstrated that the simulation was effective. Based on the simulation results，an effective model was established using ANSYS to simulate the physical process of high-speed gas flowing through sieve tray，and the stress distribution under different operational conditions and structural parameters. Results showed that maximum stresses appeared in the center and edge of the tray，and the stress of the tray increased with gas velocity，and decreased with the opening ratio. For tray with fixed opening ratio， an optimal hole diameter could minimize the tray stress caused by high speed gas.

Key words: sieve tray, high-speed gas, numerical simulation, stress distribution