Agitators configuration

Figure 4. Ribbon blender agitator configurations (A) continuous ribbon, arranged for center discharge (B) continuous ribbon arranged for end discharge (C) interrupted ribbon (D) paddle-type ribbon.

The reader may consult the reference section of this chapter for citations dealing with these types of agitator configurations and specific applications. 

As is common in most polymer reactor design problems, heat transfer is one of the major process concerns. For example, if the heat transfer is primarily through the wall of a jacketed reactor, the overall heat transfer coefficient is a function of both the agitator configuration and the degree of swelling of the particles. 

Table 4 Effect of agitation configuration on hydroformylation of 1-dodecene [5].

Figure 5 Hydroformylation conversion and regioselectivity versus reaction time with different agitation configurations [5].

It is important to investigate the effects on the reaction kinetics and rates of heat generation and gas evolution of factors such as scale-up, agitator configuration, materials of construction, variations in addition rate, reactant concentration and hold times. The effects of process maloperations should also be established. 

Aubin J, Mavros P, Fletcher DF, Bertrand J, Xueieb C. (2001) Effect of axial agitator configuration (up-pumping, down-pumping, reverse rotation) on flow patterns generated in stirred vessels. Chem. Eng. Res. Des., Trans. IChemE, 79 (Part A) 845-856. 

Delumping agitator configuration High-speed chopper blades at sides High-speed chopper blades at sides Pin mills above paddles None... 

Kouda T, Yano H, Yoshinaga F (1997) Effect of agitator configuration on bacterial cellulose productivity in aerated and agitated culture. J Foment Bioeng 83 371-374 MacCormick CA, Harris JE, Jay AJ, Ridout MJ, Colquhoun U, Morris VJ (1996) Isolation and characterization of a new extracellular polysaccharide liom an Acetobacter species. J Appl Bacteriol 81 419-424... 

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