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difficult separation task
Originating from many sources, slop oils vary
widely in composition and physical properties. One common
factor is that they contain both water and solid impurities,
coarse as well as fine. Often they form a very tight emulsion.
Treatment of slop oil is therefore a difficult task and most
of the methods used for their recovery fail in one way or
the other. Gravity settling is a slow and often ineffective
operation that requires plenty of space and sometimes excessive
amounts of expensive chemicals. Filter presses can only separate
solids from liquids and have a very low capacity. Incineration
is an expensive process, whereby valuable oil is not recovered.
Centrifugal separation – the
key to successful recovery
Experience
has shown that centrifugal separation is the most efficient
and cost effective method for slop oil treatment. This is
the result of special design features of the three-phase
disc stack centrifuge employed and the high G-force it develops.
Depending on source and quality, each slop oil requires its
own technical solution. A single centrifuge may suffice or
a multi-stage system may be necessary and we can tailor the
system that best suits the situation.
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