System non-foaming

Figure 8-137. Flooding capacity, sieve trays weir height is less than 15% of tray spacing low- to non-foaming system hole area at least 10% hole sizes Ms-in. to M-in. dia. surface tension = 20 dynes/cm. Used by permission, Fair, J. R., Petro/Chem. Engineer, Sept (1961), p. 46, reproduced courtesy of Petroleum Engineer International, Dallas, Texas.

Figure 9-21G. Generalized pressure drop correlation for non-foaming systems for IMTP metal random packing. Parameter of curves is pressure drop in inches of water/foot packed height. Numbers in parentheses are mm of water/meter of packed height. Used by permission of Norton Chemical Process Products Corp., Bull-IHP-1, 12/91 (1987).

Figure 9-211. Norton IMTP Packing, Efficient Capacity Correlation for random metal packing only for non-foaming systems. Norton recommends designing up to 90% of efficient capacity ...

Figures 9-21G and 9-211 present the proprietary estimating capacity charts for the various sizes of the Intalox packing for a non-foaming system. The system base HETP of a packing is the flat HETP value produced by uniform distribution, see Figure 9-22.

Pressure drop equation For IMTP packing, non-foaming system, use Figure 9-21G or I. 

The Efficient Capacity of the packing in a non-foaming system can be estimated as ... 

Other flow charts did not lead to a better agreement with experimental data at different pressures. Larachi et al. [19] have suggested the use of a modified Charpentier s diagram. Based on experimental data available to date on the high-pressure trickle-pulsed transition, the extended diagram is proposed to quantify directly the effect of pressure in non-foaming systems. 

An example of a non-foaming system is one where a reflux condenser can be used to cool the reactor if the mixture were a natural foamer, the condenser would not work properly because it would be full of foam. However, it should be established that the circumstances leading to runaway do not cause foaming. Small-scale equipment for testing foaming behaviour has been proposed. ... 

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