Performance structured packings

Intalox High Performance Structured Packing, Bulletin IS-IR Norton Chemical Process Products Corporation. 

Malax high-performance structured packing (Fig. 8.11 ). Relatively flat crimps, somewhat rounded crimp apexes, and deeply embossed surfaces with tiny perforations distinguish lntalox high-performance structured packing. It is available in three sizes in metals from the Norton Company. 

Figure e.11 (Continued) Common corru gated-type structured packings. Norton Company part f, courtesy of Jaeger Products, Inc.)... 

Figure 9-611. Intalox high-performance structured packing. Used by permission of Norton Chemical Process Products Corp., Bull. IS-2T.

High-performance structured packing Flexipac, gauze, Glitsch grid. Leva film not for viscosities >2 mPa-s, pressures >200 kPa ... 

Figure 4.3 Intalox high-performance structured packing. (Courtesy of Koch-Glisch Co.)...

In addition, Chen" gives typical performance data for trays, random packing, and structured packing in Table 11. 

We conclude this subsection with a bravo to Bravo" who provides useful rules of thumb for tower retrofits. These are intended for engineers comparing structured packing to high-performance trays for replacing older conventional trays. 

Figure 23. Choosing between structured packing or high performance trays for distillation retrofits. (Reproduced with permission of the American Institute of Chemical Engineers. Copyright 1997 AlChE. All rights reserved.)...

Chen [133] highlights the long-term growth of the technically popular use of bubble cap trays, valve and sieve trays, followed by the increased popularity of packed columns accompanied by the development of random and structured packings. There are some applications in chemical/ petrochemical/petroleum/gas treating processes where one type of contacting device performs better and is more economical than others. Chen [133] points out ... 

For most efficient performance, the feibricated sections of the structured packing usually are placed in a specific rotated pattern in the column to ensure uniform liquid flow, and vapor cross-mixing. 

Intalox High Performance Metal Structured Packing [102]... 

For good and uniform performance of any structured packing it is essential to have imiform, consistent vapor and liquid distribution therefore, much care must be given to the design details. See earlier discussion in this chapter. 

For specific final performance sizing of a distillation column using Norton s Intalox structured packing the designer is referred to the manufacturer s technical representatives, and should not assume the preliminary results obtained from any manufacturer s bulletin included here will necessarily serve as a final design. As a preliminary examination of a design problem (used by permission of Norton Chemical Process Products) ... 

Structured packings maintain mass-transfer performance with minimum penalty for pressure drop [108]. Two models are presented for calculating pressure drop (1) Bravo-Rocha-Fair [111] and (2) Stichlmair-Bravo-Fair [112]. Each method is qmte involved with rather complex equations to calculate the factor to ultimately calculate a pressure drop. The authors [108] recommend for design using... 

A commercial 4-ft diameter refinery depropanizer unit s performance after replacement of the lower half of a trayed tower with Intalox-2T (R) structured packing is described in Reference 118. 

Applications of structured packing into ethylene plant s various column systems [119] have been successfully achieved, but the individual manufacturers must be consulted to use their most directly applicable pilot and commercial data, which are generally not published. The use of published general correlations should only be used for a first or approximation design, while the delicate or important final design must be performed in cooperation with the manufacturer. 

Packing surface area/unit packing volume increases resulting in more efficient packing performance (lower HETP). For structured packing the more narrow passage-way between sheet components results in more efficient performance [90]. 

Rukovena, F., Effect of Pressure on Structured Packing Performance, presented at A.I.Ch.E. meeting, Houston, Texas. 

Fitz, C. W., A Shariat, and L. Spiegel, Performance of Structured Packing at High Pressure, presented at AIChE Spring National Meeting, Houston, Texas, March (1995). 

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