Abstract
Packed towers are used increasingly in a variety of applications in the chemical process industries. The reasons for this are an increase in the availability of design information, the evolution of higher-capacity and higher efficiency mass transfer packings, and improvements in distributors and support plates. Today, packings can be considered for most services where high numbers of theoretical stages are required for mass transfer. Many of the mechanical aspects of tower construction and assembly have an influence on the design and interpretation of tower performance. Every effort should be made to increase the effectiveness of contact between the process streams and to reduce losses by entrainment or wall effects whilst minimizing pressure drop. At the same time the design must be consistent with the economics dictated by the process and type of construction. Most of the fractionating columns in gas-processing plants that were previously equipped with trays can now be filled with packings. Packings, such as slotted rings in metal and plastic saddles, offer large improvements in capacity for absorption and heat transfer applications.
Published Version
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