Packing pressure

Amalgams made with spherical particles may predominate ia use over those made with flake-shaped particles because the desirable plasticity is obtained with a lower mercury content, satisfactory compaction is achieved with lower packing pressures, and there is less influence of manipulative variables upon values for appropriate physical properties. 

For ordered, or structured, packings, pressure-drop estimation methods have been reviewed by Fair and Bravo [Chem. Eng. Progr, 86(1), 19 (1990)]. It is not common practice to use the packing factor approach for predicling pressure drop or flooding. For operation below the loading point, the model of Bravo et [Hydrocarbon... 

The complete packing process is computer monitored and computer controlled. Potential problems in column packing can be seen directly and the affected column is removed from the production cycle. Pig. 9.11 shows a graphic representation of a column packing process by monitoring the packing pressure with time. 

FIGURE 9.11 For each PSS SEC column, packing pressure and permeability are monitored for the best reproducibility of column performance. 

Capacity and separation gains due to lower pressure drop of packing. Pressure drop of packing is typically 3 to 5 times lower than that of trays. 

When considering pressure drop models based only on water, hydrocarbons system capacity can be significantly overstated. For Nutter random ring packings the pressure drop/capacity models fit the data within +10% over the range of commercial interest, i.e., 0.1 to 1.0 in. water/ft of packing. Pressure drop alues for design operation should... 

Diunped Packing Pressure Drop Below and at Flood Point, Liquid Continuous Range... 

Read, F, for the approximate calculated Cs, ft/sec from Table 9-37 at calculated liquid rate, Ib/hr-ft. Then read Y from IMTP Packing Pressure Drop chart. Figure 9-2IG and then read curves showing pressure drop, (may require interpolation). 

Norton Intalox Structured Packing Pressure Drop Coefficient F for Type 2T Packing... 

Hsu, Shih-liang, Packing Pressure Drop Estimated, Hydro. Processing, V. 64, No. 7 (1985) p. 89. 

Leva, M. Chem. Eng. Prog. Symp. Ser. No. 10, 50 (1954) 51-59. Flow through irrigated dumped packing Pressure drop, loading, flooding. 

Column systems are basically classified into two groups conventional and cartridge columns. A conventional column usually demonstrates better column efficiency than does a cartridge column due to a higher column packing pressure, but its usefulness depends on the quality control system of the manufacturer and the skill of their technicians. A cartridge column is economical, but its theoretical performance and lifetime can be less than a conventional column. 

System Behaviour Packing Pressure Liquid flow-Gas ... 

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