Starch washing multicyclone system type PH0 pages

Starch washing multicyclone system type PH
For purification of starch slurries
Application
The multistage starch washing system purifies and concentrates the starch slurries obtained from various raw materials.
The purification is done by countercurrent washing in six to
twelve multicyclone stages, depending on the specific application.
Working principle
The multistage starch washing system comprises several
multicyclone housings containing a number of internally manifolded cyclonettes. Each individual housing is fed with a separate pump,(see the simplified flow diagram on next page).
The overflow of each housing is connected to the pump feeding the preceding housing in the system. The underflow of
each housing is connected to the pump feeding the next
housing in the system. In this way the underflow of each
housing is diluted with the overflow of the next following
housing, and is then fed to the following housing. By diluting
the underflow of the next-to-last housing with fresh water, a
countercurrent washing system is obtained in which the
starch is repeatedly concentrated and diluted with an increasing portion of fresh water. The purified starch milk leaves the
system concentrated, through the last housing's underflow.
The wash water together with impurities and part of the
starch leave the system through the first housing's overflow.
Standard design
The multistage starch washing system comprises housings in
stainless steel with internally manifolded cyclonettes. The
housings are equipped with removable front covers (bolted),
and with flanged feed, overflow, and underflow connections.
It also features centrifugal pumps in stainless steel, with
mechanical seals. The interconnecting piping and the support
frame are made in stainless steel.
Advantages
• Performance - The combined effect of dilution washing and
high shear forces in the cyclonettes results in optimum
washing efficiency.
• Reliable Operation - absence of moving parts results in minimum wear and minimum downtime.
• Easy to operate - required washing effect and underflow
concentration are controlled by adjusting control valves.
• Low maintenance cost.
• CIP - easy to implement CIP.

VENT

COVER
CYCLONE

OVAL
COUNTERFLANGE

OVERFLOW

UNDERFLOW

FEED

UNDERFLOW