Candle filter (CF)

Clarification & concentration

A complete CF 24-113 candle filter plant with 76 m² filter area to desulfurizing the natural gas in the amine sweetening process
Complete BHS candle filter plant

The BHS candle filter (type CF) is a fully automatic, batch-operated filter with filter elements arranged vertically inside a pressure vessel. It is used for clarifying liquids with a low solids content. The candle filter is a compact unit, allowing high throughput rates, dry cake discharge and a wide range of cake treatment options.

The suspension is fed into the pressure vessel and continuously pumped until the required cake thickness has been reached. The filter cake is formed on the outside of each filter candle. The filtrate is discharged from the inside of the candles through immersion pipes. After filtration, the filter cake can be washed, reslurried or dried. Finally, the cake is lifted by a blast of compressed air and discharged.

BHS also provides complete candle filter installations including fittings, instrumentation, piping, pumps, tanks, steel structures and control systems. The plants have a modular design for easy transport and assembly.

Machine design of a candle filter
Machine design of a candle filter
Structure of a filter candle and cake formation
Structure of a filter candle and cake formation
Discharge of the filter cake
Discharge of the filter cake

Process criteria:

Operating method intermittent
Operating pressure up to 10 bar (g)
Operating temperature up to 250 °C
Solids content (suspension) up to 10% (by weight)
Cake thickness up to 30 mm
Grain size from 0.5 μm
Filter output - suspension 0.1 - 10 m³/m² h
Filter output - dry solids -
Active filter surface (total) 1 - 150 m²
Online contact request
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Downloads

Brochure "Candle filter (CF)" (PDF / 1.5 MB)
Brochure "Candle filter (CF)"

Product brochure for candle filter (CF)

Size: 1.5 MB
Brochure "Liquid clarification systems" (PDF / 2.6 MB)
Brochure "Liquid clarification systems"

Product brochure "Liquid clarification systems"

Size: 2.6 MB
Technical data sheet "Candle filter (CF)" (PDF / 103 KB)
Technical data sheet "Candle filter (CF)"

Technical data for candle filter (CF)

Size: 103 KB
"Filtration technology" questionnaire (PDF / 27 KB)
"Filtration technology" questionnaire

Questionnaire to describe your filtration application, serves as a specification for drawing up a quotation or performing filtration tests.

Size: 27 KB

Advantages

  • High throughput rates
  • Fully automatic operation
  • Low costs of investment
  • GMP-compliant design possible (pharmaceuticals & foodstuffs)
  • Modular, turn-key plant concepts

Applications

BHS filtration technical center

Link to tests at BHS technical center

Technical article

Removing contaminant fines from process water

ptq Petroleum Technology Quarterly
Q2 | 2016 (April-May-June)
April 2016
PDF (8.6 MB)
Removing contaminant fines from process water

Careful analysis and creative approaches are required for optimum applications of filtration technologies. The article discusses filtration technologies, applications for grey water and water scrubbing as well as troubleshooting.

Size: 8.6 MB

Choosing a Fine-Particle Filtration System

Chemical Engineering Progress (CEP)
December 2014
December 2014
PDF (4.4 MB)
Choosing a Fine-Particle Filtration System

Filtration technology has advanced to meet the demand to remove small particles at low concentrations. When designed ocrrectly, a candle filter or a pressure plate filter may be a more-efficient replacement for a traditional filtration scheme.

Size: 4.4 MB

Removing salts and contaminants in glycol regeneration

ptq Petroleum Technology Quarterly
Q2 (Apr, May, Jun) 2014
April 2014
PDF (669 KB)
Removing salts and contaminants in glycol regeneration

A new process combining candle filters and pressure plate filters enables more glycol to be safely recovered from natural gas than by conventional methods

Size: 669 KB
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