BHS indexing vacuum belt filter

The BHS indexing vacuum belt filter measures 3.5 m wide and has 73.5 m2 of filter area in addition to a candle filter system. The belt filter performs filtration, washing and drying of high-value product in an alkaline slurry, while the candle filters recover fines and recombine them in the process for maximum product recovery. This technology enables production of thin cakes (as small as 5 mm) on a continuous basis. The vacuum filtration, cake washing, vacuum or hot-gas drying with mechanical compression, and automatic and continuous dry-cake discharge steps are tailored to meet specific process requirements. In the filter’s continuous-indexing design, the vacuum is switched on and off to allow the filter cloth to move intermittently in steps across fixed trays. This eliminates the need for rubber carrier belts, a motor and a variable-frequency drive, and allows the use of the highest possible vacuum at the fixed trays.