installation of baffles. Angle-mounted mixers are usually clamp-mounted onto a sup-port plate or channel affixed to the sidewall of the vessel. These are the "portable" mixer designs that are widely used. They offer ease of installation and low cost (Fig. 10). Propeller mixers, typically, are operated at around 300-400 rpm or at high speeds around 1750 rpm, depending on the manufacturer's standards. Usually, lower speed units with larger impeller diameters are the best choices for blending applications. However, a high-speed propeller, which may not be optimized with respect to cost and horsepower, may provide the higher shear rates required for a level of emulsifying or of dispersing of solid agglomerates. For drawing in solids from the top surface of the liquid, a second impeller is often specified. This works well in some instances. The propeller should not be so near the surface as to cause surface turbulence and aeration.

DOI link for installation of baffles. Angle-mounted mixers are usually clamp-mounted onto a sup-port plate or channel affixed to the sidewall of the vessel. These are the "portable" mixer designs that are widely used. They offer ease of installation and low cost (Fig. 10). Propeller mixers, typically, are operated at around 300-400 rpm or at high speeds around 1750 rpm, depending on the manufacturer's standards. Usually, lower speed units with larger impeller diameters are the best choices for blending applications. However, a high-speed propeller, which may not be optimized with respect to cost and horsepower, may provide the higher shear rates required for a level of emulsifying or of dispersing of solid agglomerates. For drawing in solids from the top surface of the liquid, a second impeller is often specified. This works well in some instances. The propeller should not be so near the surface as to cause surface turbulence and aeration.

installation of baffles. Angle-mounted mixers are usually clamp-mounted onto a sup-port plate or channel affixed to the sidewall of the vessel. These are the "portable" mixer designs that are widely used. They offer ease of installation and low cost (Fig. 10). Propeller mixers, typically, are operated at around 300-400 rpm or at high speeds around 1750 rpm, depending on the manufacturer's standards. Usually, lower speed units with larger impeller diameters are the best choices for blending applications. However, a high-speed propeller, which may not be optimized with respect to cost and horsepower, may provide the higher shear rates required for a level of emulsifying or of dispersing of solid agglomerates. For drawing in solids from the top surface of the liquid, a second impeller is often specified. This works well in some instances. The propeller should not be so near the surface as to cause surface turbulence and aeration.