3 Elements of Pile Cloth Media Filter Design
Three must-haves in a successful pile cloth media disk filter design:
FIRST Design External Centrifugal Pumps with Valves, NOT Submersible Pumps
Disk backwash shoes are manifolded together and tied to either a backwash valve or to a submersible pump. The sludge manifold in the tank bottom must also be tied to a valve or submersible pump. Only in the case of very small applications should submersibles be used because numerous pumps will be required.
Up to four disks may be manifolded together. For a 6 MGD peak tertiary wastewater treatment application, or 12-disk Standard filter, at least three submersible pumps are required for backwash plus a fourth for sludge wasting.
An external pump design could require only one pump with three valves, greatly reducing maintenance requirements, especially since a redundant filter will likely be necessary. Signing up a utility to maintain an excessive quantity of submersible pumps is not their best interest.
SECOND Replacing Disk while Filter in Operation Does NOT Provide Unit Redundancy
A disk is only one part of a filter system, thus if a pump, the controls, or another component malfunctions, the whole filter system must be taken offline. Further, we at Beacon find it shocking (pardon the pun) how it could be deemed safe to work on an energized piece of equipment that is a tank full of water. OSHA would have a field day with those responsible, which could include the design engineer.
THIRD Specify the Disk Filter Manufacturer Supply at least ONE ROW of Frame Wedges
In the spare parts section, specify that the disk filter manufacturer supply at least one row of frame wedges, not a disk’s worth or a couple, but a row.
Industry-dominant, fixed backwash mechanism with rotating disk configurations have four, six, or eight wedge frames that comprise a disk. Frames are replaced in a row of disks, then the disk is rotated for the next row to be replaced. If facility maintenance personnel have a row’s worth of frames, they may order replacement cloths in advance and have these frames mounted with new cloths, ready for replacement.
Having these extra frames will greatly reduce the back-and-forth handling and time of replacement. Even better, as some of our clients have, is a filter’s worth of replacement frames.
Remember that Beacon has direct replacement cloths for Brand A filters, with 10-, 5-, and 2-micron cloths available.
If You Have Brand A, Replace with Brand B (Beacon)!
For legacy competitor installations, contact BEACON for direct replacement cloths (DuraPile™ 10, 5, & 2 μm) and exchange services.
Call 843-481-4470 or click below for a quote!
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Beacon Water Technologies
GDisk® Pile Cloth Filtration