Packings Mellapak

Sulzer Bros. Ltd., Performance Characteristics, Suiter Column Packing Mellapak, Winterthur. Switzerland. 1985. 

Structured packings. In the case of the perforated packings, Mellapak 250 Y and Montz B2-500, the size of the packing surface was not found to have any influence on the resistance coefficient /, see Fig. 3-10. 

Based on the data given in numerical Example 3.2, the aim is to determine the pressure drop of the packing Mellapak 250Y in a column with ds = 1.0 m for the test system air/water at ambient conditions. The pressure drop will be determined for a liquid load of Vl = 15.7 m3 h- and for the gas capacity factors Fy = 1.6 /Pa and Fy = 2.3 V -The experimentally derived values are as follows, acc. to Kuzniar and Nizahski [25, Chap. 3] ... 

Meier W, Hunkier R, Stocker WD. Performance of a new regular tower packing Mellapak . 3rd Int. Symp. on Distillation, London, April (1979). German version Chem.-Ing.-Techn., Vol. 51 (1979) No. 2, p. 119/122... 

A single plate of the packing Mellapak Plus is presented in Figure 30A. 

For structured packing, some tests with Mellapak 250Y [Meier, Hunkeler, and Stocker, IChemE Symp. Ser. 56, p. 3, 3/1 (1979)] showed no effect of bed height on packing efficiency, while others (Cai et al., Trans IChemE, vol. 81, Part A, p. 89, January 2003) did show a significant effect. 

Toya et al. [13] used X-ray tomography to scan gas/liquid flow in a corrugated structured packing known as Sulzer Mellapak 250 Y. The solids profile of the dry structured packing was reproduced with fair accuracy. The scan was performed in a 60-cm-diameter column. Very thin liquid film flowing past the structure at 0.006 m/s was also detected by the tomography unit. 

Pilot-plant experiments have been carried out at real process conditions in the coke plant August Thyssen (Duisburg, Germany). The DN 100 pilot column (Fig. 9.11) was made from stainless steel and equipped with about 4 m of structured packing (Sulzer MELLAPAK 350Y), three liquid distributors, and a digital control system. Several steady-state experiments have been compared with the simulation results and supported the design optimization of the coke gas purification process [91]. 

Fig. 2. Structured packings metal Mellapak by Sulzer Chemtech Ltd (left), Montz-Pak A3-500 by Julius Montz GmbH (middle) and plastic Mellapak by Sulzer Chemtech Ltd (right).

Mellapak (Fig. 8.11 a). Mellapak has grooved and perforated surfaces. Adjacent elements are rotated 90°. The crimp angle is 45°, and the crimp apex is sharp. Mellapak is available in several types. The Mellapak number denotes the nominal surface area of the packing per unit volume (m2/m3). The suffix denotes the angle of orientation to the vertical axis Y signifies 45°, X signifies 60°. For instance, Mellapak 250.Y has a surface area of 250 m2/m3, and a 45° angle of orientation to the vertical axis. Mellapak is available in metals and plastics from Sulzer Chemtech in Switzerland. 

Montz B1 (Fig. 8.11cf). In contrast with Mellapak , Flexipac, and Gempak , the corrugations of the Montz Bl packing are sinusoidal... 

Figure B.1B (Continued) GPDC interpolation plots for structured packings flood points, (b) The Billet plot for several structured packings (cj the Spiegel and Meier plot for Mellapak , (Part b from R, Billet, Packed Column Analysis and Design, Ruhr University, Bochum, 1989, reprinted courtesy of Ruhr University part e, from L. Spiegel and W. Meier, 1. Chem. E. Syrtip. Ser. 104, p. A203, 1987 reprinted courtesy of the Institution of Chemical Engineers (UK).)...

For structured packings, tests with the Koch-Sulzer BX and CY wire-mesh packings and with Mellapak 250Y showed no diameter effect on HETP (3,19,32,33). Wu and Chen (167) state that the same applies to Gempak packings. On the other hand, tests with Hyperfil showed an increase in HETP with column diameter (168). 

Figure 11.4 Published HETP data for Mellapak 125Y. 350Y, and 500Y and Flexipac 1 structured packings (see Table 11.2 for curve identification). (a) Plotted against vapor load (6) plotted against liquid load.

Mellapak 260Y/Flexipac 2 structured packing (Unmarked data signifies Mellapak data. ... 

Mellapak 250Y/Flexipac 2 structured packing (Unmarked dato signifies Mellapak data. A star after system, end camment 16, signify Flexipac data) (Continued) ... 

Mellapak . 446-448. 452. 487-490, 623-625. 647, 648, 678-681 Mersmann and Deixler holdup. 511 Mersmann packing flood, 486 Molokanov reflux-stages, 116 Montz ... 

For the system of Example 13.15, a packed column will be analyzed for (a) 2-in. metal pall rings and (b) Mellapak 250Y structured packing. From Table 13.13, Fp for pallrings = 131 m or 40ft . From Table 13.15, Fp for Mellapak 250Y = 66m or 20,1 ft . The liquid viscosity is 0.20 centipoises = 0.43 centistokes. 

Fig. 5 Structured packing (Sulzer Mellapak 252Y, courtesy of Sulzer Chemtech). Left shows overall packing layer. Right shows smooth flow direction change in center of packing layer used in this particular packing.

Fig. 24. Souders load diagram for capacity limit determination for four structured packings of the Sulzer-Mellapak type. The solid lines represent the capacity limits of the respective packings as defined by a pressure drop of 1.2 kPa/m (A) 125 Y (B) 250Y (C) 350Y (D) 500 Y. Flooding rates are about...

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