Effect of channel geometry in regular ceramic packings on the hydrodynamics of heat and mass exchange

• Published in: Chemical and petroleum engineering Vol. 44; no. 5-6; pp. 307 - 311
• Main Authors: Pushnov, A. S., Berengarten, M. G., Lagutkin, M. G., Sokolov, A. S., Shustikov, A. I.
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.05.2008
• Subjects: Calculations; Ceramics; Channels; Chemistry; Chemistry and Materials Science; Cross sections; Design; Fluid dynamics; Fluid flow; Geotechnical Engineering & Applied Earth Sciences; Industrial Chemistry/Chemical Engineering; Industrial Pollution Prevention; Mineral Resources; Natural gas; Operating Experience; Specific surface; Surface chemistry; Mass Exchange; Distillation Tower; Hydraulic Resistance; Head Loss; Channel Geometry
• ISSN: 0009-2355; 1573-8329
• DOI: 10.1007/s10556-008-9054-2

It is noted that regular structured packings, which permit maximum development of the contact surface, are coming into increasingly greater use in the chemical, petroleum-refining, petrochemical, and other branches of industry for implementation of heat-and mass-exchange processes in liquid-vapor (gas) systems. It is demonstrated that for equal surface areas of the elements of irregular and regular granular beds and equal Reynolds numbers, the coefficients of mass exchange are approximately equal, while the coefficient of hydraulic resistance of the regular packing is three orders lower. A simple packing in the form of a block with parallel through channels (passages) is investigated on a structural and production basis. A relationship is presented for the specific surface of the channel and the size of the cell, and it is established that the specific surface, and of course, the active surface decreases by a factor of 30 as the size of the cell increases from 0.5 to 15 mm. The influence exerted by the cross section of the channel on head loss is also demonstrated.