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BHS-Sonthofen GmbH Thin-Cake Solid-Liquid Separation,
Cake Washing & Drying Technologies
SOLID- LIQUID SEPARATION
SYSTEMS
Barry A. Perlmutter
President & Managing Director
BHS-Sonthofen GmbH
Seminar Outline
• BHS Introduction & BHS Testing
• Clarification-Combination Filtration
• Candle Filter & Pressure Plate Filter Technology
• Concentrating Candle Filters
• Vacuum Belt Filters - Concentrating Candle Filters
• Rotary Pressure Filters
• Pharma Autopress
• Summary
BHS-Sonthofen Location
Hannover
Hamburg
Rostock
Berlin
Leipzig Bonn
Frankfurt
Stuttgart Nurnberg
Munich Vienna
Salzburg
Graz Innsbruck Bern
Zurich
Sonthofen
D
CH A
BHS-Sonthofen GmbH
Divisions
Filtration
Technology
Mixing
Technology
Crushing
Technology
Recycling
Technology
BHS-Filtration New Location
• BHS-Filtration Inc.
New Location
• 14,000 ft2 Facility of
Office & Warehouse
• $1.3 million
Investment
Candle Filter
Pressure Plate Filter
Autopress
Rotary Pressure Filter Indexing Belt Filter
Rubber Belt Filter
BHS Technology Portfolio
BHS Batch/Continuous
Filtration and Clarification
for Low Solids Concentrations
Clarification and Recovery Applications
with the BHS
Candle and Pressure Plate Filters
BHS Batch/Continuous
Filtration and Clarification
for Low Solids Concentrations
• Applications include water & amine scrubbers,
chlor-alkali, chemical, biodiesel, gasification /
grey water, activated carbon, catalysts, heavy
metals, PTA fines and pharmaceutical
• Replaces filter presses, manual plate filters, bag,
cartridge, metal filters and centrifuges
• Filtration to 0.5 um, cake washing and drying
• Precoat of the filter media is possible, if required
• Complete containment and Automatic discharge
BHS Batch/Continuous
Filtration and Clarification
for Low Solids Concentrations
Candle Filter: Vertical Cake Structure
Cake discharge by gas expansion of the filter media
Pressure Plate Filter: Horizontal Cake Structure Cake discharge by plate vibration & gas-assist
No spinning plates-eliminates solids sticking
No rotating or mechanical seals-eliminates leakage
BHS Concentrating Candle Filters &
Pressure Plate Filter
- Feed Rate:
260 gpm at 600 ppm solids
- Result:
2 x 20 m2 Concentrating Candle Filters
1 x Pressure Plate Filter (4 m2)
For Filtration, Cake Washing & Drying
Concentrating Candle Filters for
Grey Water
Fines Slurry at 200 PPM BHS Pocket Leaf Filter Clarified Water (0.5 um)
Slurry Feed
800 gpm
200 ppm solids
800 gpm Clear Filtrate
0.5 micron particle
retention
Sludge Discharge
Once per 3 hours
300 gallons; 10% solids
Hold
Tank
or
Pump
BHS Candle
Filter System-
Slurry
Discharge
3 x KN170-62
Parallel operation:
2 online 1 offline
6 hr cycle per filter
BHS Vacuum Belt Filter Technolgies Continuous-Indexing & Rubber Belt Filter
Continuous-Indexing
- Continuous slurry feed
- Indexing belt movement
- Up to 75 m² filter area
- Electric or pneumatic drive
- Dewatering, cake washing,
steaming, and pressing
- For small to medium size
throughputs
- No sealing media (water, air)
Rubber Belt Filter
- Continuous slurry feed
- Continuous belt movement
- Up to 200 m² filter area
- Electric drive
- Dewatering, cake washing,
and steaming
- Higher throughput per m² for
high efficient filters
- No water or air required for
belt support
Process Operations
Continuous Process Operations
Vacuum Filtration
Cake Thickness: 5 – 150 mm
Cake Washing:
Co-current and Counter-Current
Drying:
Vacuum, Convection, Pressing and
Steaming
Schematic Presentation
•Belt movement
by pneumatic
cylinders
• No motors
• No rubber belts
• No moving
trays
• No internal
rails or hoses
Main Components
• Fixed Vacuum Trays & Filtrate Outlets
• Suspension feed
• Cake Washing
• Cake discharge
• Cake Drying
• Filter cloth wash
• Belt Tracking
• Pressure or Dust Containment
• The vacuum trays are fixed in place
• Each tray has a filtrate outlet
• Tray is profiled for filter media sealing
• Stainless steel, alloys or synthetic materials
• Filtrate pipes can be heat-traced /insulated to eliminate precipitation
Vacuum Tray
Cake Drying
•Vacuum Drying
•Convection Drying:
Hot or Ambient
Temperature Air or Gas
•Steam Blowing
•Cake Squeezing / Pressing
•Heated Trays
•Combination of Techniques
Cake discharge from a 12 m2 belt filter:
10 tons/hour of solids Cake Depth = 50 mm
Moisture < 10 % Chlorides < 100 ppm from an
initial level of 20,000 ppm
Cake Discharge
High Solids Slurries (Up to 55%)
BHS Continuous Rotary Pressure Filters
Chemical:
Agricultural, Specialty, Pigments,
Starch, Terephthalic Acids, Polymers, etc.
ROTARY PRESSURE FILTER
• Continuous Pressure Filtration
• Enclosed and Pressure Tight
• Cake Washing & Solvent Exchange
• Steaming & Drying
• Atmospheric/Pressurized Cake Discharge
• Applications: Starch, HEC/HC/MC,
Proteins, Cellulose Acetates, Coffee
extracts and similar
BHS Autopress (Contained Filter Press)
Pharmaceutical Applications for Replacing
Centrifuges and Nutsche Filter-Dryers
• Batch Pressure Filtration
• Cake Washing (forward & reverse)
• Drying (Blowing, Vacuum, & Compression)
• Automatic Cake Discharge
AUTOPRESS
Summary of BHS Turnkey Projects
• Description of Installation
• Scope Engineering
• Process Design
• BHS Technologies
• PLC Controls
• Tanks, Pumps, Instrumentation
• Full skid packages
• Commissioning
• Performance Guarantee & Testing
BHS-Sonthofen GmbH Thin-Cake Solid-Liquid Separation,
Cake Washing & Drying Technologies
THANK YOU!
www.bhs-filtration.com