| Nijhuis
Water Technology Gravity Separation Systems can be applied to solids/liquid
separation and liquid/liquid separation. These systems would typically be used
where high separation rates are required. The main driving force in separation
is the difference in density of the substances which are to be separated.
Nijhuis Water Technology has a diverse range of products supported by in-house
technical expertise. Nijhuis Water Technology has experience in applying these
products to a wide range of industries. The Nijhuis product range is divided
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Nijhuis
has Oil-Water Separators in its product range, utilizing three forms of
separation techniques: flotation, sedimentation and 3-phase separation. All
three techniques can utilize parallel-plate separators, which are available in
cross-flow and counter-current flow configurations. It is also possible to
include a coagulation/flocculation system upstream of the separator (please
refer to our coagulation/flocculation brochure).
CFS
Cross Flow Separator
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The
CFS Separator is a 3-phase separator, which is typically used as a
flotation device for the separation of liquids with a density lower than
water. The CFS contains a cross flow plate pack and the intercepted oil
layer is skimmed off by a manually skim pipe. Heavy particles are
collected and discharged via a conical bottom. Some
applications are:
Ballast
water treatment Oil-water
separation
Typical
features of the CFS Cross Flow Separator:
Very
compact construction Easily
adapted to existing constructions Suitable
for effluents with strongly varying pollution and volumetric loads Large
sludge cone to treat oily waste water with high amounts of sediment.
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CCS
Counter Current Separator
The
CCS Counter Current Separator is comparable to the CFS, with the exception that
it operates on the principle of counter current flow direction.
Typical
features of the CCS Counter Current Separator:
Suitable
for effluents with strongly varying pollution and volumetric loads Suitable
for short term periods with oil slugs Easy
upgraded to a Dissolved Air Flotation unit Can
easily be extended with a coagulation-flocculation step.
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The
Nijhuis PPA Module is a plate pack assembly which can be installed into a
civil or steel construction. The PPA modules are available with various
plate distances to make them suitable for various applications and for
separation of particles lighter or heavier than water. The specific
construction of the assembly has resulted in an increase of 15-20%
effective working area in comparison with similar systems with the same
external dimensions. Some
applications are:
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| Nijhuis
manufactures and delivers cross-flow and counter current flow separators
for high pressure applications. This technology is particularly used in
the petrochemical industry, in areas where high pressure needs to be
maintained.
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The IPS Plate Separator is a three phase separator, applied primarily as
a sedimentation unit for the separation of solid particles from liquid. Besides
solids sedimentation, the IPS is also suitable for the interception and removal
of floating materials, for which a skim pipe or mechanical scraper can be
installed. The IPS is a two-stage settler. Easy, high rate settling solids are
collected in the (smaller) first cone, the remainder of the relatively slow
settling particles is separated by a cross-flow plate pack and collected in the
second sludge cone. The sediment is thickened and discharged automatically
through drain valves. As well as the IPS Cross Flow Settler, Nijhuis has a NPS
Counter Current Settler in its product range. For the comparison between
cross-flow and counter current flow, please refer to the Oil-Water Separators.
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Some applications are:
Starch settling Sand and clay interception Activated sludge settling Separator for coagulation/flocculation processes Oil-Water separation
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The Nijhuis Sand Screw Conveyor is a small gravity settler with an
integrated screw conveyor, which transports (and dewaters) the solids out
of the settler before they are discharged.
Some applications are:
Sand and clay separation from water Classification of particles Dewatering of sand and clay Separation and dewatering of effluent from flotation unit drains.
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The Nijhuis Screenings Wash Unit is a combination of a screen, a
dewatering screw and a wash/spray unit. This machine is applied where
screenings need to be washed and organic substances have to be removed
from the screenings to meet the disposal requirements.
Some applications are:
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Nijhuis Water Technology has a long term experience with gravity
separation systems. Our specialists will be pleased to advise you on the best
system and how this might be augmented with other high quality technology from
Nijhuis Water Technology to create a fully integrated water treatment system
which gives you the security you require.
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