Technologies

Backflush Filters

The BOKELA Backflush Filter is available with up to 500 m² filtration area.

Process Design

The main components of the BOKELA Backflush Filter are the pressure vessel, the filter elements, a filtrate receiver for backflushing, quick opening/closing pneumatic valves and a process automation. The quasi-continuous operation of the Backflush Filter consists of following cycle steps:

vessel filling and pre-filtration
clear filtration
filtrate backflushing for cake discharge and sludge output

Performance Data

high specific throughput of up to 1.4 – 2.0 m³/m²h (depending on the application)
low solids content in the filtrate: ≤ 10 mg/l (depending on the application)
complete cake discharge thanks to optimised backflushing
concentrated solids at the discharge with approx. 150 g/l (depending on the application)
short pre-filtration and backflushing, i.e. short dead times
high availability

Filter Data

filtration area of up to 500 m²
compact unit with up to 8 m² filtration area per 1m³ vessel
filtration pressure of up to 5 bar, abs
fully automated and simple operation
hermetically closed and clean operation
stable, optimised filtration elements with optimised mechanic and process design
quicker and safer solids output thanks to:
- quick moving pneumatic valves with high reliability
- angle of output cone adapted to the product (65-75°)
long cloth lifetime (depending on the application)
small footprint thanks to high specific filtration area