SPEL Spel Filter, Руководство по эксплуатации и техническому обслуживанию

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SPEL Stormwater Installation & Operation Manual | SPEL Filter
Features
The SPELFilter has a patented
design that facilitates influent flow
over the entire surface area of
the media, providing consistent
pollutant removal within a small
footprint.
The SPELFilter provides highly
effective media filtration using
gravity flow conditions, without the
need for moving parts or floating
valves. This eliminates the risk of
mechanical failure, such as stuck
valves and seizing components
during its service life. This
provides highly robust treatment
performance.
Hydraulic head provided by a
suitably sized weir in the filter
vault forces stormwater through
the filter media via the inlet ports
underneath the filter cartridge.
Refer to the table below for
minimum head required for the
SPELFilter cartridges to assist in
sizing the weir.
The water to be treated enters the
SPELFilter cartridge via an upwards
direction as the water level builds
up around the SPELFilter. This
‘up flow’ reduces the amount of
sediment that could enter the
media cartridge, as the sediment
is allowed to drop to the vault
floor under gravity. Any remaining
sediment in the water is introduced
through the filter media under
hydraulic pressure and is filtered.
Water is filtered through the
media, where dissolved and
particulate Total Nitrogen and
Total Phosphorus are removed via
reaction with the media, in addition
to the removal of Total Suspended
Solids / sediment.
SPELFilter Media Self-
Backwash feature
A one-way air release valve located
at the top of the filter cartridge
allows air to escape as the cartridge
fills up with water. This creates a
siphonic flow condition as the air is
completely evacuated from inside
the SPELFilter cartridge. Siphonic
flow conditions are maintained until
such time the water level outside
of the cartridge falls beneath the
inlet ports underneath the filter. At
this moment, the water level inside
the SPELFilter cartridge is higher
than the surrounding water level.
The water inside the SPELFilter
cartridge is then expelled upon the
break of the siphon, and the water
flows down and out of the inlet
ports under gravity, onto the vault
floor.
This is a highly effective backwash
of the media and allows the
expulsion of a high proportion of
sediment out from the SPELFilter
media. The expelled sediment can
be removed either manually or with
a vacuum from the vault floor.
This backwash effect allows the
media to remain highly conductive
and is the key to the industry
leading longevity of the SPELFilter
cartridge system, which does not
need replacement for at least 5
years, and typically will achieve
up to 6-8years of service, subject
to the SPELFilter being regularly
maintained in accordance with
this guideline and in accordance
with the specific needs of the
catchment.
Figure 2 - Diagram of water flow
through SPELFilter
Figure 3 - Typical Outlet Weir Wall