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Print Works Coolant Water Filtration
Fluid : cooling water containing a lot of rust particles. In a
printing works
Flowrate : 40M3/hr
Line size : 4"
Working Pressure : 2 – 3 barg
A well known cardboard box manufacturer with a large printing works was filtering coolant on a sidestream basis using a small 10" wound cartridge filter. The coolant is used to cool different machines in different parts of the process and becomes contaminated with lots of rust particles from old pipework etc. When you take out one of the cartridges it is covered in a sticky oily contaminant.
Problem:
The cartridge filter was too small to have any real impact on the amount of
contaminants being recirculated through the system as the volume being passed
through it was too small. They wanted a larger system which was easy to use and
service.
Solution:
We supplied a Ronningen-
Petter bag filter for the
purposes of a sidestream trial.
Initially we supplied a woven
multifilament filter bag which
tended to block rapidly due to
the soft gelatinous nature of
the contaminants. We decided
we need to replicate the
benefits of the depth type
cartridge so we gave them a
spun polypropylene high efficiency bag which has some depth to it as well as being
highly efficient.
They were able to run the unit for several weeks due to the depth nature of the bag plus its high surface area compared to a small cartridge. The depth formed by the matrix of fibres provides a high volume of voids within the bag i.e. the fibres and their intersection provides the matrix to trap the particles and the high number of voids between them to allow the bag to accommodate a large volume of solids.
Result:
They purchased 3 off bag filters, model SS24-224-LP mounted in parallel on common
flanged inlet & outlet headers. (E & OE)
