By Ralph F., Jr. Strigle
Over the past 25 years, major adjustments have taken position in either the layout of tower packings and the applying of packed columns. more and more, issues have grew to become from skill to strength potency and the environmental impression of processing operations. This new version has been retitled and up to date all through to mirror those adjustments and the improved makes use of for established applications. It presents uncomplicated details at the operation mechanism of packed columns, in addition to useful equipment for designing such columns, confirmed tools which were used over the past decade to layout columns as huge as forty six toes in diameter and for separations requiring as many as 128 theoretical phases. The techniques offered are in accordance with the author's useful event received over forty years, and feature in lots of situations been constructed due to real-life transformations. the varied and sundry significant functions of packed columns are reviewed, in order that their benefits compared to different mass move units should be made up our minds. specific features of a procedure that have to be thought of to make sure winning column operation are mentioned.
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Extra info for Packed Tower Design and Applications
Absorption of oxygen in water-textured metal sheets (Data of McGlamery ). mass transfer is enhanced through increasing the turbulence in the liquid film. The wetted areas were calculated from the data shown in Figure 2-2. Figure 2-4 illustrates that interfacial area can be increased significantly by promoting spreading of the liquid through design of the surface texture impressed upon the metal sheet. PRESSURE DROP Figure 2-5 illustrates a typical section of Intalox packing 2T for use in a small diameter column.
Dissertation, University of Texas at Austin, May, 1988. 10. Bravo, J. L. , Hydrocarbon Processing, Vol. 65, No. 3, 1986, p. 45. I I . Fair, J. R. and Bravo,J. , Chemical Engznehng Progress, Vol. 86, No. 1, 1990, p. 19. 12. Fair,J. R. and Bravo,J. , "Prediction of Mass Transfer Efficiencies and Pressure Drop for Structured Tower Packings in Vapor/Liquid Service,"University of Texas at Austin, 198'7. 13. Stichlmair,J. , Gas Separation & Purification, Vol. 3, 1989, p. 19. "New Holdup, Pressure Drop, and Effi14.
LntaloxB structured packing (metal). ) The effective gas velocity for structured packings that are corrugated at a 45" angle to the horizontal is: Ve = v E sin 45' (2-5) The value of hTwas correlated as a function of the Froude number (Fr) for several gas and liquid rates up to the loading point of the packing. The Froude number for the liquid phase is given by Equation 2-7. In this model, the equivalent diameter of the packing is taken to be four times the hydraulic radius where the triangular flow channel is considered to have two metal sides and one open side.
Packed Tower Design and Applications by Ralph F., Jr. Strigle