垂直筛板塔内催化剂筐式装填结构的流体力学研究  

Hydrodynamics of Catalyst Basket Packing Structure in the Vertical Sieve Plate Tower

作　　者：杨红健[1] 侯凯湖[1] 田源[1] 

机构地区：[1]河北工业大学化工学院,天津300130

出　　处：《高校化学工程学报》2009年第3期387-391,共5页Journal of Chemical Engineering of Chinese Universities

摘　　要：基于垂直筛板帽罩的垂直特性,开发了一类用于催化精馏的新型催化剂筐式装填结构。该结构的主要特点为:均匀装填催化剂的催化剂筐置于帽罩外侧;气相与被提升的液相在帽罩内形成的气液混合物从罩孔喷出后进入筐内的催化剂床层;床层内的气-液-固的有效接触可显著促进非均相催化反应的进行。用空气-水体系在内径φ48mm冷模塔上考察了催化剂筐式装填结构的结构参数(帽罩形式、帽罩孔径和开孔率)对装填结构流体力学性能的影响;并根据操作范围和干板、湿板压降等因素对其进行了优化。研究结果表明基于柱形帽罩的催化剂筐式装填结构的气-液-固三相的接触状态优于基于矩形帽罩的;帽罩孔径φ2mm和开孔率0.056时的气-液-固接触效果和塔操作状态最佳。Based on the characteristics of the vertical cap cover on sieve plate, a novel catalyst basket packing structure for catalytic distillation was developed. A catalyst basket with uniformly packed catalyst was fixed around the cap cover. The lifting gas mixes with the lifted-up liquid to form gas-liquid mixture in the cap cover and then the mixture sprays into the catalyst bed through the holes drilled on the cover wall. The heterogeneous catalytic reaction can be improved significantly by the sufficient contact with each other of the gas, liquid and solid （catalyst）. The effects of the cap cover shape, perforation rare and size of holes on the cover wall on the hydrodynamic performance of the structure were investigated in a ψ48 mm cold column with air-water as experimental medium. According to its operational range, the dry-plate and wet-plate pressure-drops, etc., the suitable cap cover structure cooperated with the basket catalyst packing structure was determined. The result shows that, compared with the rectangle cap cover structure, the structure of cylinder cap cover provides superior gas-liquid-solid contact and wider operational range. In addition, the experimental results also show that the optimal gas-liquid-solid contact performance and column operation can be obtain when the cap cover has holes of ψ2 mm and performance ratio of 0.056.

关 键 词：催化剂装填结构 垂直筛板 催化精馏 流体力学 

分 类 号：TQ021.1[化学工程] TQ053.5