rotary drum filter .pdf

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Original filename: rotary-drum-filter.pdf
Title: Rotary Drum Filter
Author: goodwaychina.com

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Rotary drum filter

vacuum dewatering machine is domestic cassava starch production industry,
yeast production industry Dehydration commonly used equipment, its
manufacturing process is mature, mainly used for plant starch production in
recent years Dehydration, degeneration starch production dehydration. In
particular, the dehydration of potato and cassava starch emulsions is more
reliable and more stable.
Vacuum filter work principle:
The straw type vacuum dehydrator is divided into three parts: material area,
dewatering area and blanking area, which can be continuously realized.
Solid-liquid separation. Under the suction of the vacuum pump, a vacuum is
generated in the hollow shaft and the link pipe system.
A negative pressure is formed on the surface of the filter screen, and the
degree of vacuum generated inside the suction pipe is low when the drum is
moved outside the material zone.
When running to the material zone (level tank), the filtrate floods the surface of
the drum filter and begins to adsorb the starch emulsion.
Under the action of negative pressure, the starch emulsion in the material zone
is adsorbed to the surface of the outer filter screen to form a wet starch cake
layer.
When the drum runs into the dewatering zone, the vacuum in the linked pipe
system continues to rise and is adsorbed on the drum filter table.
The free water in the layer of starch emulsion is sucked into the piping system
through the filter through the gap between the starch particles.
After mixing the liquid and the gas, it is sucked into the filtrate tank (gas water
separator) through the hollow shaft, and then the gas is passed through the
filtrate tank.
Body and liquid separation. The liquid is pumped out by the centrifugal pump
of the filtrate, and the gas is sucked out by the vacuum pump and discharged
into the air. precipitate
Due to the unequal size of the powder particles, the powder particles cannot
form thicker and thicker through the filter to form a filter cake. When the drum
runs to
When the discharge area is unloaded, it is hung by the scraper to become wet

starch after dehydration, and the reciprocating cycle forms the entire flow of
starch dehydration.
Vacuum filter work principle :

The inner wall of the drum and the outer wall of the hollow main shaft are
evenly distributed with a plurality of vacuum suction pipes. The pipes connect
the inner wall of the drum to the outer wall of the hollow main shaft to form a
complete vacuum system, so that the gas and the liquid are mixed in the same
pipe and sucked out by the water ring vacuum pump. The gas and the liquid
are separated by a filtrate tank (gas water separator). The drum is mounted on
a stainless steel frame and carried by bearings attached to the main shaft. One
end of the main shaft is connected with the speed reducer to drive the vacuum
drum to rotate, and the other end of the shaft is a hollow structure, which
functions as a vacuum suction. The outer surface of the drum is equipped with
a stainless steel support net, and a filter mesh of 160 mesh or more is placed
on the outer surface of the support net (depending on the diameter of the
starch). The surface of the drum is effectively dehydrated to occupy about 70%
of the entire drum area, and the blade edge is upward.
Nanyang goodway machinery&equipment co.,ltd


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