MPTEQ have optimised Filter Press automation for optimal operational utilization and safety.
Filter press plants are made up of a few key components, the optimal selection and design of these components is what ensures that optimal availability, lowest cake moisture, low maintenance cost and safety are consistently achieved.
The components we have optimised in our plants start at the feed tank, correctly baffled, aerofoil, efficient impellers, accurate level control. We use ALFA two stage high pressure pump from Matec, fitted with a mechanical seal. These units have proven to be reliable and have low wear.
One of the key features of our low operating costs is
the way the slurry is introduced into the filter
At the start of the cycle the solids impact directly onto the cloth, this is when the cloth is most venerable, we minimise the solids impact on the cloth by running the feed pump at the slowest speed practical until the cloth is precoated and the feed pressure reaches about 1 Bar. The pump is then sped up to the maximum speed, filling the filter as quickly as possible with optimum cloth life.
With this system we have often achieved over 13 000 cycles before cloth replacement.
To maximise the cycles per hour we use a rapid open and close hydraulic system.
. This allows the filter press to open and close in less than 90 seconds. The plate shifter movement is also done by hydraulic motors fitted on both sides of the machine. Pressure transducers allow total control of the shifter forces allowing the PLC to detect any abnormal plate position, preventing damage of any kind.
The hydraulically driven plate shifting mechanism allows the plate opening speed to be optimised for the shortest possible cycle time. Multiple chambers are opened with every shifter movement, again, optimising cycle time.
Filter press operator safety is a priority, and all filters are fitted with light curtains on both sides as well as pull trip wires
Being fully automatic operation using Siemens PLC’s operator intervention is seldom required but the intrinsic safety devices preventing humans inadvertently touching any moving parts without the machine stopping.
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