Stirred reactors, multiple impellers

Magelli, F. Fajner, D. Nonentini, M. Pasquali, G. Solid distribution in vessels stirred with multiple impellers. Chem. Eng. Sci. 1990, 45, 615-625. Fajner, D. Magelli, F. Nocentini, M. Pasquali, G. Solids concentration profiles in a mechanically stirred and staged column slurry reactor. Chem. Eng. Res. Des. 1985, 63, 235-240. 

Y.Q. Cui, R.G.J.M. Van der Lans, HJ. Noorman, and K.C.A.M. Luyben. Compartment mixing model for stirred reactors with multiple impellers. Transactions of IChemE, 74 261-271,... 

Dohi N., Matsuda Y., Itano N., Shimizu K., Minekawa K., Kawase Y., Mixing in multiple-impeller stirred tank reactors with boiling liquids, Can. J. of Chem. Eng. Ottawa 77 (1999) 5,... 

Figure 7.14 Stirred-tank reactor with multiple impellers.

Figure 6.18 Standard multiple impeller stirred-tank reactor design.

Type Multiple Impeller The bottom impeller should simultaneously play the role of gas dispersion and solid suspension. Solid suspension in this category has received very limited attention. The only study available is that of Saravanan et al. (1997). These investigators studied solid suspension characteristics of 2-2 type multiple-impeller systems. The top gas-inducing impeller used was 6 FID, while a variety of impellers that generated different flow patterns (Fig. 9.8) were used as the bottom impeller. The difference between multiple-impeller gas-inducing systems and stirred reactors vis-a-vis the location of the gas sparger has already been discussed in Section 9.4.3. Saravanan et al. (1997) found that the value of obeys the... 

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