Crystallization classified suspension crystallizer

Although such a feature can be included on many types of classified-suspension or mixed-suspension crystallizers, it is most common to use this feature with the forced-circulation evaporative-crystallizer and the DTB crystallizer. 

A cross-section of a classified suspension crystallizer is shown in Fig. 11.3-3. The citea luting line drawoff is typically in the upper section of the suspension chamber and returns tangentially into the evap-... 

Figure 8.51. An Oslo-Krystal vacuum crystallizer showing two different methods of operation a) classified suspension, b) mixed suspension. After Saeman, 1956)...

The mean crystal size in a perfectly classified suspension is given by Anean = 0.63Zp... 

CSCPR crystallizer classified suspension, classified product removal) with the crystal phase and the circulated mother liquor separated and classified product discharging... 

An even greater problem is the quantitative application of the population balance in the coarse grain crystallizers of DTB and fluidized bed design, which due to the cyclical behavior described above are almost impossible to describe with the MSCPR (mixed suspension classified product removal) and CSCPR (classified suspension classified product removal) approaches. 

Mixed-Suspension, Classified-Product-Removal Crystallizers. 18-48... 

One method for improving the size distribution still further is to employ fines destruction (Jones etal., 1984 Jones and Chianese, 1988). In this technique, a classified stream of suspension, i.e. containing only fine not coarse crystals, is removed from the crystallizer in an elutriation leg (Figure 7.6(a)). 

Figure 7.10 Fines destruction and classified product removal during continuous mixed suspension crystallization...

While in batch operation, the fresh solution is fed into the crystallizer all at once the crystallization process carries on for a certain period, then the suspension is discharged from the crystallizer and is conveyed to the device for solid-liquid separation. For such operation the classifying leg (9), the overflow cofferdam (7), and the pump A are not needed. 

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