基于3D打印的塑料板波纹填料整砌单元

Plastic Corrugated Packing Unit Based on 3D Printing

传统塑料板波纹填料板片间存在结合不稳,易导致散片、错片、大型塔填装效率低等问题,根据国家标准HG/T 5099—2016及塑料板式填料结构,设计了一种基于3D成型方法的塑料板波纹填料单元,通过单元整砌形成整块波纹填料,其性能参数为:水力直径为6 mm、比表面积为450 m^(2)/m^(3)、开孔率为10%、填料的几何尺寸为:峰高为5.65 mm、波距为11.3 mm、波长为8 mm、单元高度为100 mm、倾角为45°、壁厚为1.44 mm。与传统塑料板波纹填料相比,填料层由多个填料单元插接拼合而成,填料单元内部是塑料板波纹填料的融合体,板片表面存在大量微波纹。利用CAE对填料组合体进行力学分析发现,改进填料结构的力学性能提高,利用3D打印仿真软件进行打印模拟,并通过打印试验确定了关键成型参数:层高为0.15 mm、填充密度为100%、填充样式为直线式。

In order to solve the questions of plate construction instability,such as loose pieces or wrong pieces,and low filling efficiency in large diameter tower,a new type plastics porous corrugated plate packing was proposed based on HG/T 5099—2016 and 3 D forming technology.The packing unit could be integrated regularly to make large diameter packing layer in tower,hydraulic diameter is 6 mm,specific surface area is 450 m^(2)/m^(3),opening rate is 10%,the geometric dimensions of the packing peak height is 5.65 mm,wave distance is 11.3 mm,wavelength is 8 mm,unit height is 100 mm,the inclination angle is 45°,and the wall thickness is 1.44 mm.Compared with traditional packing,packing layer was composed of multiple packing units plugged together.Characteristic of packing units is large number of fusion points connect inside plates together and there are a lot of micro corrugation on the surface of plate.CAE analysis of forward stress and lateral force verified the mechanical properties of the modified structure.The key molding parameters were determined by printing test.The layer height was 0.15 mm,the filling density was 100%,and the linear filling pattern was used.