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BHS-Sonthofen has been a leader in technology and innovation for over 430 years. Founded in 1563, the company is now one of the most forward thinking companies manufacturing filtration and drying equipment. Its U.S. subsidiary, BHS-Filtration, Inc. warehouse space in Charlotte, North Carolina.

BHS serves the chemical, energy, environmental and pharmaceutical marketplaces as well as the concrete, pre-cast and mining industries. For recycling, the size-reduction technologies are used for e-scrap, slag, aluminum and automotive residual shredding.

BHS Candle Filter

Candle Filter

The BHS candle filter is a batch-operated filter with candle shaped filter elements arranged vertically inside a pressure vessel. The filter cake is formed on the outside of the filter candles while the clear filtrate is discharged from the interior of the candles through dip pipes. All the process steps are carried out under pressure. The candle filter is used for clarifying liquids with low solids content. It is a compact unit, operates fully automatically and allows high throughput rates, dry cake discharge and a wide range of cake treatment options.

Pressure Plate Filter

The BHS Pressure Plate Filter provides for thin-cake pressure filtration, cake washing, drying, reslurry and automatic discharge as well as heel filtration in an enclosed, pressure vessel. Units are available from 0.17 m2 up to over 45 m2 of filter area per vessel. Pressure Plate Filters are installed for clarification and recovery applications from liquids with low solids content with 5% to less than 1% solids and trace amounts.

Rotary Pressure Filter

The BHS Rotary Pressure Filter is a continuously operating unit for pressure filtration, cake washing and drying of slurries up to 50% solids.”   Rotary Pressure Filter Filtration is conducted via pressure of up to 6 bar.  Positive displacement washing, reflux or counter-current washing follows filtration.  Multiple washing steps as well as solvent exchanges, steaming and extraction can also be accomplished.  Finally, the cake is dried by blowing hot or ambient-temperature gas through the cake. The Filter has a uniquely designed discharge system, which provides for atmospheric discharge from pressure filtration. After automatic cake discharge, the filter cloth is washed; the clean filter cloth the re-enters the feeding / filtration zone thereby continuing the process.  All solvent and gas streams can be recovered separately and reused in the process to minimize their consumption. Their typical applications are for:
  • Pharmaceuticals
  • Dyes & Pigments
  • Food Additives
  • Printing Inks
  • Aromatic Acids
  • Agricultural Chemicals
  • Fine Chemicals
  • Polymers
  • Brewing
  • Catalyst Recovery
  • Fluid cracking catalysts
  • Activated Carbon
  • Rubber Additives
  • Waste Liquid Filtration
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