110 Chapter 4
ment, the speed of agitation, tank geometry,
vortex creation, air incorporation, and shear-
ing effects impact the mixing effi ciency.
Many types continuous mixing systems,
also called in - line mixers, are available. In
devices such as the Tri - Blender and Breddo
Another type of batch mixing occurs in
tanks and silos. The tanks are equipped with
paddle, propeller, or scraped surface agita-
tors. The agitators can be positioned at the
top or bottom, perpendicular, or centrally
mounted. In addition to the type and place-
Figure 4.9. Reconstitution in a system with a venturi; the dry ingredients are added at the discharge side of
the pump.
TANGENTIAL
INLET RECIRCULATION
PUMP
RECIRCULATION LINE
RECONSTITUTION
TANK
VENTURI
UNIT
A G I TATO R
WATER
WATER METER
POWDER
SCREEN
HOPPER
ISOLATING
VALVE
DUPLEX
FILTER
RECONSTITUTED
MILK TO THE CHILLER
POWDER
WATER
VENTURI UNIT (SCHEMATIC)
RECONSTITUTED
MILK
Figure 4.8. Mixing dry ingredients using a triblender.
5
8
6
33
SMP WATER
WATER FROM
RECIRCULATING LINE
4
RECONSTITUTION WITH TRIBLENDER
POWDER
ELECTRICALLY
CONTROLLED SHUT-OFF
VALVE
IMPELLER RECONSTITUTED MIX
BELT DRIVE