Polishing Filter

1
Polishing Filter

• Jonas Gerson and Ian Swyer

2
Background

• Definition
• Polishing filters
• are used to separate liquids only having very
  small quantities of solid impurities
• ? In this case to filter out the impurities from
  the output stream from a centrifuge

3
Process Situation
4
How it Works
In-Line
T-Line
5
Design Selection

• Need
• Maximum flowrate of 27.7 L/min
• Pore size of 0.2 µm
• Available Options
• Companies Pall, Millipore, MKS
• Need both disposable filters and housing
• It was found that 1 In-Line / T-Line filter
  housings using 10 inch disposable cartridge
  filters provide the best utility for the money
• The membrane areas were compared to the maximum
  flowrate needed, and compared against equivalent
  flux.
• Optimized for pressure drop and cartridge costs

6
Pressure Drop and Flowrates for Millipore SHF
Filters
7
Suppliers and Prices
2000 Cartridge Housing
Millipore Express SHF Cartridge Filter

• Final Design

1,196 per unit,
859 per 3
Capital Cost for Unit 1482 Operating per
Batch 286 Per Year 7400