Recommendations for Solid-Liquid Mixing Equipment

In the following sections we provide several design guidelines and examples of the selection, design, and operation of equipment for solid-hquid mixing. 

Design Tip. Dished heads (ASME dished, elliptical, or torispherical heads) are the preferred design. To achieve complete suspensions, flat-bottomed heads require 10 to 20% higher impeller speeds than for dished heads (Mak, 1992). Conical bottoms must be avoided. 

Nozzles and dip pipes for liquid addition should not allow the liquid jet to impinge directly on the impeller. At too high a liquid jet velocity, the jet force will contribute to higher shaft deflections. 

Dip pipes and other probes must be supported—usually by attaching to waU-mounted baffles—or stiff enough to withstand the bending moments imposed by the fluid forces. Discuss with yom local mechanical engineer. 

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