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Vapor flow lag in distillation columns

✍ Scribed by H. Hajdu; A. Borus; P. Földes

Publisher
Elsevier Science
Year
1978
Tongue
English
Weight
659 KB
Volume
33
Category
Article
ISSN
0009-2509

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✦ Synopsis

The vapor rale In a dlstdlatlon column follows with delay the change of the heat amount Introduced to the reboder One of the causes of the vapor flow lag LS an InteractIon between the heat transfer process m the reboller and the hydrauhcs of the column Internals Tius mteractlon may have conslderahle effect upon the vapor rate response producmg a time lag of several mmutes, yet It IS not dealt with m the hterature The general theory of the vapor flow lag due to mteraction IS @ven For Sieve plates with downcomers a slmphfied mathematical model LS developed and experlmentally confirmed The response of vapor rate to rebofier heat load changes m downcomer plate columns IS approximately that of a first-order element with a time constant rangmg from about 10 set to 10 mm The effect of design, operation and system parameters IS dIscussed and estimated for Important cases

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