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Candle Filters

Candle Filters
Candle Filters

Description

The BHS Candle Filter is designed for thin-cake, batch filtration and supports additional processes such as cake washing, drying, reslurry, and automatic cake discharge. The cake can be discharged as dry, wet, or concentrated slurry. Available in filter areas ranging from 0.17 m² to over 200 m² per vessel, the Candle Filter is ideal for clarification and recovery applications, handling liquids with low solids content ranging from 5% to ppm levels.

BHS filter candles are engineered for high liquid flow and low-pressure drop. Cake discharge is achieved by distributing gas to gently expand the filter sock. The materials of construction include stainless steel, alloys, and plastics, with vessels optionally lined with EPDM, Halor, PTFE, or other materials. Additionally, filter aids can be used as a precoat and/or body feed, which is particularly beneficial for handling sticky products or challenging filtration tasks.

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Highlights

Efficient capture of fine solids

The filter media, including woven polypropylene, PTFE, Nylon, and Polyester, delivers high removal efficiency, down to 0.5 microns. As the cake builds up, the removal efficiency improves even further, reaching below 0.5 microns.

Automated Self-Cleaning

With simple controls and valve sequencing, the filter can be fully automated and operate completely hands-free in a fully contained system.

Low-Maintenance

The BHS candle filter has no moving parts, which enhances operational reliability and reduces maintenance needs. The unique surface design of each candle ensures that the cake fully separates before being discharged downward.

Technical Specifications

Type Candle length Candle area Number of candles Active filter area (total)
CF 12 1.200 mm 0,34 m² 3 units 1 m²
7 units 2,4 m²
19 units 6,5 m²
CF 18 1.800 mm 0,51 m² 19 units 9,7 m²
37 units 18,9 m²
61 units 31,1 m²
CF 21 2.100 mm 0,6 m² 7 units 4,1 m²
61 units 36,0 m²
91 units 53,7 m²
127 units 74,9 m²
CF 24 2.400 mm 0,68 m² 19 units 12,9 m²
37 units 25,2 m²
61 units 41,5 m²
91 units 61,9 m²
127 units 86,4 m²

 

All specifications apply to the standard version. Technical data for customized designs may differ from the specified data. All technical data may change due to development. Subject to modification without notice.

Operating method intermittent
Operating pressure up to 6 bar (g)
Operating temperature up to 80 °C
Solids content (suspension) up to 10 % (wt.)
Cake thickness up to 30 mm
Particle size 0,5 µm and above
Filter performance – suspension 0,1 to 10 m³/m² h
Filter performance – dry solids
Active filter surface (total) 1 to 86,4 m²

Pilot Test Filter

Pilot Filter CF12-003

  • Active Filter Area: 1.0m²
  • Dimensions (LxWxH): 4.5ft x 3.5ft x 8.5ft
  • Maximum Operating Pressure: 10 barg (145 psi)
  • Material of Construction: Stainless Steel

LKF Pilot Filter

  • Active Filter Area: 0.17m²
  • Dimensions (LxWxH): 5ft x 3ft x 5ft
  • Maximum Operating Pressure: 6 barg (87 psi)>
  • Material of Construction: Stainless Steel

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