The BoHiBar drum filter is equipped with exchangeable filter cells and is designed for steam pressure filtration It is operated to filter, wash and dewater fine-grained (x50 < 5 µm] high quality inorganic pigments that are manufactured to different specifications and must all be filtered on the same filter unit.

The BoHiBar drum filter achieves a cake moisture of < 20 % while parallel running conventional pressure filters achieve a moisture content of 30–35 %. This means a water reduction by steam pressure filtration of 280 kg per t solids or more than 2 kg water per 1 kg steam applied which means a serious reduction in energy costs.

The BoHiBar drum filter can be quickly prepared for a product change thanks to exchangeable filter cells which allow an unparalleled quick re-clothing, an automatically opening pressure vessel and excellent accessibility. This results in significantly reduced personnel costs for maintenance and cleaning.

BoHiBar Drum Filter S4 with exchangeable filter cells

Units installed

­

2

Filter area per unit

[ m² ]

4

Material of construction

 

1.4571

Power of filter drive

[ kW ]

0.25

Year of commissioning

 

2003 (unit 1), 2009 (unit 2)

 

Process and Operation Data

Solids content in filtrate

[ wt.-% ]

free of particles

Cake moisture

[ wt.-% ]

< 20

Steam per ton solids

[ kg/t ]

30 - 50

Operation pressure

[ bar (g) ]

3.5

Time for change of filter cloth

[h]

1-2

 

Product Data

Product

 

High-quality pearlescent pigments

Medium particle size

[ µm ]

< 5

Temperature

[°C ]

80

 

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