CF Candle Filter
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Clarification & concentration TRANSFORMING MATERIALS INTO VALUE

TRANSFORMING MATERIALS INTO VALUE The company BHS-Sonthofen, headquartered in Sonthofen, Germany, is an owner-operated group of companies in the field of machine and plant engineering. We offer technical solutions in the field of mechanical process engineering, with a focus on mixing, crushing, recycling and filtration. With over 300 employees and a number of subsidiaries, BHS-Sonthofen has a global presence. Cake filtration BHS has specialized in cake filtration for more than 50 years. We supply a broad range of pressure and vacuum filters for both batch and continuous operation. We have...

BHS Candle Filter (CF) The Candle Filter is a batch-operated filter. The candle-shaped filter elements are arranged vertically inside a pressure vessel. Typical process steps are filtration, washing, drying and discharging. All these steps are carried out under pressure. The Candle Filter is used for clarifying liquids with a 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. Complete Candle Filter plant of type CF 24-113 with 76 m² filter area

High process versatility Alternative materials A variety of options are available for treating the filter cake, enabling the individual process requirements to be met. The cake can be washed or reslurried in one or more stages. Air, nitrogen or other gases can be passed through the filter cake to achieve a greater degree of dewatering. If required, precoat filtration by means of filter aids is possible. To suit the individual application, we manufacture in various grades of stainless steel and alloys or coated designs and plastics. Depending on the requirement, ground and polished surfaces...

Structure of a Candle Filter Pressure vessel  Suspension feed  Filtrate outlet  Vent  Compressed gas feed  Solid discharge  Residual volume discharge  Register pipes  Filter candle  Safety valve  Pressure transducer  CIP device 

Structure of a candle Central pipe  Designed as a dip pipe, the central pipe allows complete residual discharge of the filtrate. Connection of the candle to the register  The candle is connected to the register by means of a thread at the end of the central pipe. Support grid for filter medium  The support grid for the filter cloth is a perforated body and allows a high filtrate throughput. Evenly spaced welded rods  The evenly spaced welded rods cause a wave-like configuration of the filter medium and corresponding build-up of the filter cake. Stable, reliable cake formation is the result....

CANDLE FILTER PLANTS 8 BHS manufactures Candle Filter plants for diverse applications. These are based on a range of standardized modules for plants from 1 m² to 50 m² filter area. BHS also makes individually engineered Candle Filter plants to customer specifications. The BHS Candle Filter plant consists of the following four main components: » Candle filter » Piping with fittings and measuring instruments » Steel structure » PLC controls The skid can be supplemented and expanded with further accessories. Process solution Besides the machinery itself, BHS also offers complete process...

ACCESSORIES & VERSIONS 9 www.bhs-sonthofen.com Heel filtration device Tube sheet design for slurry discharge The heel filtration device enables the residual volume to be processed on completion of the filtration cycle by means of an internally filtering candle at the vessel cone. This ensures complete heel filtration with a minimum of compressed gas. In the case of slurry discharge, the candles are mounted on a tube sheet that separates the filtrate and suspension chambers. The filter cake is discharged by backflush with filtrate. Under specific conditions, the tube sheet design represents...

Sweetening amine process, Turkmenistan Processing of amine for natural gas desulfurization. The BHS system comprises two units. Each unit contains a Candle Filter of type C 24-113 with a 76 m² filter area, a precoating station, two activated carbon absorbers and a control filter. Processing an amine solution, Canada Two-stage processing of amine desufurization of exhaust gas from a power station. In the first stage, the solution is clarified using two parallel Candle Filters of type CF 18-37, each with a 19 m² filter area, and a joint body feed system. In the second stage, the concentrated...

Cleaning of electrolyte fluid, Germany Cleaning of the electrolyte used in the coating unit of a cold strip mill. The BHS plant consists of three Candle Filters of type CF 21-049, each with a 29.4 m² filter area.

Sweetening amine process, USA Cleaning an amine solution used in a gas scrubber unit of a refinery. The BHS plant comprises two Candle Filters of type CF 18-19, each with a 10 m² filter area.

Regeneration of grey water, USA Regeneration of grey water in a coal gasification plant. The BHS plant comprises three Candle Filters of type CF 179-66, each with a 66 m² filter area. Filtration of rubbed-off catalyst parts, USA Removing FCC fines from water used for gas scrubbing in a refinery. The BHS plant comprises two Candle Filters of type CF 23-147, each with a 100 m² filter area and a precoating unit.

Tests give certainty We perform initial tests with our pocket leaf filters. These tests can be performed quickly and easily at your location or in our well-equipped laboratory in Sonthofen. Basic data can thus be obtained about the filterability of a suspension and the general design of a production filter. For more extensive tests, even spanning several weeks, we can rent out pilot and lab filters for all BHS filter types. Filters made of different materials are also available. If necessary, the filters can be equipped to meet specific customer requirements. These filters can be used to...