【作者】 毛明华；

【导师】 李群生；

【作者基本信息】 北京化工大学 ， 化学工艺， 2004， 硕士

【摘要】 本文介绍了塔设备及筛板塔的流体力学性能研究进展情况,对塔设备的研究和发展做了展望，同时概括了导向筛板的结构和性能等方面的研究情况。应用空气-水系统，在φ600mm的有机玻璃塔中，通过改变液流强度和气速，对高效导向筛板的压降、漏夜、雾沫夹带、泡沫层高度等流体力学性能进行了测定，对实验测定的结果进行了关联，建立了新的计算塔板各项流体力学性能的关联式。与关联模型计算结果的比较发现，测定结果与计算结果比较吻合，表明本文所建立的关联式是合理的。这些关联式对于新型高效导向筛板的设计具有参考作用。同时对两套塔板的实验结果进行比较，得出了在相同的操作条件下塔板各结构参数对实验结果影响大小，对于以后在对不同物系时的塔板的设计具有参考作用。文中对高效导向筛板上液体流速分布和气液两相间的相互作用进行了分析和研究。通过对气液两相作用机理的具体分析，认为在塔板上的气液两相流动体系中，当气体从垂直方向穿过塔板上液层时，对液体产生阻力作用，同时从导向孔出来的气体对液体有推动作用。导出了两相错流时描述塔板上液体流动的动量方程，参照前人的方法，在动量方程中考虑了气体的阻力作用和推动作用。建立了模型计算时所需的边界条件，并给出了模型的求解方法。更多还原

【Abstract】 In this paper, the background of tower equipment and the hydrodynamics performance of the sieve tray were introduced, and prospect the research and development of the tower equipment. The structure and performance of flow-guided sieve tray were summarized. The hydrodynamics of high efficient flow-guided sieve tray were experimentally studied with a air-water system in aφ600mm circular column. Pressure drop，entrainment，weeping and foam thickness were measured. The experimental data have been correlated and the new model of pressure drop, entrainment and weeping have been established . The comparison of the tested with calculated date shown that the model proposed in this paper is reliable. These models will play a reference role for new tray design . Comparing the result of the trays , then the construction parameters’ contribution to the performance of the tray in the same operation condition was obtained, which have a reference role for design tray for different system. The velocity distribution and the reciprocity of the two phases on the high efficient flow-guided sieve tray were analyzed and researched. By concrete analysis the reciprocity mechanism of the vapor and liquid, considered that vapor upright through the liquid has a resisting force to liquid, and the vapor through the oriented hole has driving force to liquid in the two phase flow system on the tray. The paper educed the momentum equations to describe liquid flow on the tray with two phasess crossflow. Resisting and driving force of vapor exerted to liquid flow were considered in the momentum equations. Set up the boundary conditions and resolve measure which were needed in the model calculation.更多还原