of the system. The higher the foaming tendency, the lower the derating factor. Derating factors are not unique to foaming systems. They are applied to nonfoaming systems where experience has consistently-shown that standard flooding equations predict too high. Sometimei derating factors are used solely as overdesign factors. Typical derating factors found in the literature are listed in Table 6.7.

The application of derating factors is fraught with confusion. Can-tion is required, especially when communicating with an outside company whose derating practices may differ. The following need to be carefully specified.

TABLE 6.7 Derating factors (Continued)





Furfural refining towers

0 0

Post a comment