PVDF Cylindrical Cartridge Ultrafiltration Membrane
Introduction
UF Hollow Fiber Membrane employs Phase Inversion combined with Fiber Embedding as the preparation method. It uses Polyvinylidene Fluoride (PVDF) as the membrane material and a hollow PET braid as the internal support. Such a structure brings many benefits to it, e.g. high flux, high tensile strength and long life span, etc. Its flux is 1.5 - 2 times that of similar products under the same membrane area. So for the same treatment loading, fewer membranes and frames are needed, the whole system can be more compact in a smaller footprint and with a lower investment. It can adapt to harsh environment and intensive rinsing conditions without breakage, so as to greatly reduce the labor and maintenance costs in application.
Polyvinylidene Fluoride (PVDF) is a preferred membrane material, having the best chemical stability in fluoroplastics, characterized by high toughness, low coefficient of friction, strong corrosion resistance, aging resistance, climate resistance and good irradiation resistance. Its resistance to oxidants (sodium hypochlorite, etc.) is more than 10 times that of Polyether Sulfone (PES), Polysulfone (PSU) and many other materials. In water and wastewater treatment, microbial and organic contaminants are often the main causes of irreversible fouling in ultrafiltration, and rinsing with oxidants is the most effective means to restore flux. PVDF material shows its outstanding superiority in such situations.
Parameters
Specifications |
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Module Length |
1560 mm |
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Module Diameter |
200 mm |
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Nozzle Diameter |
50 mm |
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Net Weight |
30 kg |
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Material of Housing |
UPVC |
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Material of Potting |
Epoxy Resin |
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Material of Membrane |
PVDF membrane with inner support of PET braid |
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Preparation Method |
Phase Inversion combined with Braid Embedding |
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Pore Size |
0.1μm, 0.2μm |
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Inner Diameter of Filaments |
1.0 mm |
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Outer Diameter of Filaments |
2.2 mm |
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Total Membrane Area |
30 m² |
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Initial Flux for Pure Water |
6 - 8 m³/h |
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Design Flux |
2.3 m³ |
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Turbidity of Filtrate |
≤ 0.5 NTU |
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SDI of Filtrate |
< 5 |
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Total Suspended Solids |
≤ 0.1 ppm |
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Tensile Strength |
≥ 300 N |
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Peel Strength |
≥ 4 bar |
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Operation Mode |
External Pressure Driven, Outside-in, Cross-flow |
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Rinsing Method |
Chemical Rinsing |
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Normal Recovery |
80 - 90 % |
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Normal Operating Pressure |
1.5 - 2.0 bar |
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Max. Feed Pressure |
3.0 bar |
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Max. Backwash Pressure |
0.5 bar |
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Max. Turbidity of Influent |
< 10 NTU |
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Max. Tolerable NaClO Strength |
200,000 ppm·h |
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Tolerable pH Range |
1 - 13 |
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Tolerable Temperature Range |
2 - 45 °C |
Distribution Diagram of Pore Sizes
(Tested by Gas-Liquid Displacement Technique of Bubble-Point Methods)
External Pressure Driven Design
greatly relaxes restrictions on feeding conditions and reduces possibilities of membrane fouling and scaling.
Higher Flux While Ensuring Finer Filtration
enables the good quality filtrate to be obtained under various feeding conditions.
Stronger Strength Against Pressure & Tension
enables applications under harsh environments and high-intensity cleansing conditions.
Prominent Stability Against Oxidants
makes it endurable for a wide range of cleaning agents to recover its flux effectively and prevent fouling and scaling.
Certifications
Utility Model Patents and Design Patents