Physical and chemical erosion of the
Once the trough has been
trough increases the gap between the
properly prepared, fresh concrete
outer edge of the screw pump flight and
is poured and a new trough starts
the trough itself, which allows more water
to take shape. The finished surface
to pass the flight rather than travel up the
is created by reinstalling the screw
trough.
which has temporary screeding
bars attached to the flights and
This will clearly affect the overall efficiency
slowly rotating the screw to give
of the screw pump as more energy will be
the perfect clearance.
required to transport the same volume
of water.Although this is a very gradual
While the flights on the screw
process there comes a point where the
were refurbished the bearings
increased energy costs and reduced
can also be replaced and in cases
performance necessitate a refurbishment
where the bottom bearing has a forced
of the screw and trough.
lubrication feed, this can be replaced with
a new stainless steel, eco-friendly bearing
In essence this involves welding a new
which is sealed for life and requires no
section onto the flights of the screw
annual maintenance. Top bearings can be
pump to return the outside diameter to
assessed for wear and replaced as required
its original dimensions and then remaking
to ensure the refurbished installation will
the trough to provide the optimum flight
continue to operate for many years to
to trough clearance.
come.
Having removed the screw for
refurbishment, the on-site team
would expect to break out the
original concrete trough using a
pneumatic breaker that is fitted to
a remote controlled, tracked
vehicle.
ECS Engineering Services is able to offer
an on-site inspection service, carried out
by experienced engineers to assess the
condition and expected lifetime of any
screw pump installation.
If any maintenance is required, ECS can
Due to the access difficulties involved
deliver a complete service offering,
with refurbishing the concrete trough it
including, if necessary, renewal of the
is important to carry out the work in the
screw itself with support from its long
safest manner possible.
established partner Landustrie.
This type of project is something that
ECS Engineering Services is regularly
involved with, providing a complete
turnkey solution that minimises any
disruption to the operation of the
treatment works.
www.ecsengineeringservices.com