Padovan
"Greenfilter" Horizontal Plate Earth Filters
Padovan Greenfilters are used
for clarifying and polishing turbid liquids containing low concentrations
of highly obstructive solids in suspension. The filters range
in size from 5 to 60 square metres, providing units suitable for
all winery sizes. The machines are all compact in design, and
are made with mobility in mind.
The most significant feature
of these filters is the lack of a drainage grid - a major source
of pollution. Due to a patented design, the filter plates ensure
an elevated drainage flow during filtration and precoating. The
filter plates are made from AISI 304 stainless steel, with 80
micron 316 stainless steel mesh being placed on these to provide
the filtering surface.
A special inlet flow distributor
avoids any vortices or abnormal flows of liquid, ensuring that
an even cake is formed on the plates. Product feed is obtained
by means of a centrifugal pump mounted on the frame, and the addition
of diatomaceous earth is controlled by a dosing pump.
As well as the main filter, a
small auxiliary filter is supplied to filter the residual liquid
in the machine. At the end of filtration the plates are rotated
by means of a hydraulic coupling, allowing the removal of the
cake through a discharge door in the bottom of the machine. Washing
of the machine usually takes about 5 minutes, and is done using
a directional washing manifold inside the main housing.
(The operating principles are
very similar to that of the Padovan Ecofilter. Click here to see these principles.)
Padovan "Greenfilter
Top" Horizontal Plate Earth Filters
These units are similar to the
Greenfilter, but are made with smaller wineries in mind. They
range in size from 2 to 5 square metres, and do not have the motorised
spinning of the plates for cleaning. Cleaning of the plates is
performed by removing the main housing, and tilting of the plate
pack. An optional pneumatic lifter can be used to remove the housing.
Another feature of these machines
is that filtration of residual liquids is performed through the
bottom filtration plate, eliminating the need for a separate auxiliary
filter.
