关键词: 对二甲苯（PX), ；吸附；格栅；冷模试验；计算流体力学（CFD）；分布

Abstract:

Para-Xylene (PX)， is an important organic chemical material, which is usually purified from xylene isomers through Adsorption Separation Technology (AST) in a Simulated Moving Bed (SMB). As a key technology of SMB, the grid inside the adsorption tower is always a wall prevented the complete set of AST from nationalization. A method combined computational fluid dynamics (CFD) with cold test was applied in conquering this barrier. An ACG reference grid was developed based on the functions of the grids. Then a series of CFD simulations and cold tests were carried out to optimize the ACG grids and proved the reliability of the developing method. After incessant optimization, a highperformance grid, ACG-Ⅰ, was developed and scaled up for a PX demonstration plant with annual output of 30000 ton. It can be shown from the operating data that the performances of the ACG-Ⅰare very excellent, and the deviation of the value of pressure drop of the grid between the operating data and CFD data is very small.

Key words: para-xylene(PX）, adsorption, grid, cold test, computational fluid dynamics(CFD）, distribution