摘要
为了研究规整填料局部特征单元内流体的流动状况和传质效果,采用计算流体力学的方法对JKB-250Y交叉波纹填料以及增加隔板后的JKB-250Y交叉波纹填料进行了模拟计算比较。结果表明,加入隔板后有效改善了传质的局部均匀性,并且消除了两股气体交叉流动带来的阻力,降低了通道的单位压降。增加隔板后的交叉波纹填料压降比传统交叉波纹填料压降降低20%~50%,增加隔板后的交叉波纹填料传质系数比传统交叉波纹填料传质系数提高约20%,可见提高传质分布的局部均匀性是提高传质效率并且降低阻力的较为有效途径之一。
The method of computational fluid dynamics was used to simulate and compare the fluid flow and the mass transfer in the local feature unit of JKB-250Y cross-corrugated packing and cross-corrugated packing with partition. The results showed that the local uniformity of mass transfer was improved and the resistance caused by two gas cross flow was eliminated to reduce the pressure drop of the channel by adding a partition in the cross-corrugated packing. The pressure drop of the cross-corrugated packing with corrugated partition was lower of 20%-50% than that of the traditional cross-corrugated packing, and the mass transfer coefficient was higher of 20%. So it is a great idea to increase the mass transfer coefficient and reduce the resistance by improving the distribution uniformity of local mass transfer.
出处
《化学反应工程与工艺》
CAS
CSCD
北大核心
2013年第1期65-74,共10页
Chemical Reaction Engineering and Technology
关键词
规整填料
交叉波纹填料
计算流体力学
传质系数
structured packing
cross-corrugated packing
computational fluid dynamics
mass transfercoefficient
