3 phase liquid-liquid-solid Decanter centrifuges, also called
tricanter , Taking advantage of the principle that the
heavy
liquid,light liquid and solid phase, with different density and
mutually insoluble in the mixed liquid, gain different
sedimentation speed in the centrifugal force field or gravity force
field, separating stratification or causing the solid
particles in the liquid to deposit can be achieved.It is the
popular machine throughout the world and widely used in the crude
oil separation.Specially used for remove sludge and water from
crude oil.
Separation principle:
The
decanter is driven by two motors. The main motor drives the bowl
and the housing of differential mechanism to rotate through belt,
while the auxiliary motor drives through the belt pulley the input
shaft of the differential mechanism to rotate, which, after speed
change, drives the helical to rotate. In this way the bowl and
helical rotate in the same direction but with certain differential
speed. When the material to be processed (blended liquid consisting
of solid phase and liquid phase) enters the inner cavity of the
helical propeller through feeding pipe, after being accelerated by
the two-way conical accelerator, it flows out of the material
outlet, and flows into the bowl wall through inner cloth cylinder.
The light, heavy and residue phases that make up the suspending
liquid, under the action of different centrifugal force, the
residue phase quickly subsides onto the inner wall of the bowl, and
the heavy phase adheres close to the surface of the residue phase
rather slowly, while the light phase adheres close to the surface
of the heavy phase rather slowly, forming a dividing plane between
the two phases. As the sedimentation of heavy phase increases, the
top end of helical blade enters into the sedimentation layer of
heavy phase. At this time the bowl and helical propeller are
rotating in the same direction at high speed and with a certain
difference in speed. This relative difference in rotation speed
enables the helical to propel heavy phase particles to move toward
the material outlet at the small end, whereas the light phase,
through the helical passage, flows toward the liquid phase outlet
at the large end, and flows out through the overflow plate with
different R values.
