Small Ultra-filtration Membrane System for Pure Water Purification with PVDF material
1. UF technology introduction
1.1.Ultrafiltration (UF) is a separation principle for screening, with pressure as the driving force to realize
mechanical separation membrane separation process, namely under certain pressure, when the mixed
solution of large molecules or a small molecule solute through the membrane surface, solvent
(e.g., inorganic salt) and small molecule solutes through the membrane, and the solute molecules due
to mechanical filtration membrane as concentrate intercept.
1.2.Ultrafiltration membrane products made by PVDF material
PVDF hollow fiber ultrafiltration membrane has strong anti-oxidation, anti-pollution and good cleaning performance,
which is widely used in various sewage treatment industries.
2.2 Structure and Specifications of UF Membrane Modules
2.2.1 Small size of UF modules
Size and weight
|
Model | KH-UF-4040W-PVDF | KH-UF-6040W-PVDF |
Module Diameter ( A, mm) | Φ90 mm | Φ160 mm | |
Module Length ( B, mm) | 960mm | 960mm | |
Module Length (C, mm) | 1106 mm | 1304 mm | |
Size of Inlet/Outlet (D, mm) | DN25 | DN32 | |
Operating Type | Outside to Inside | Outside to Inside | |
Membrane Area | 8.0 m2 | 20 m2 | |
Dry weight of the module | 5 Kg | 12 Kg | |
Parameters |
Shell material | UPVC | UPVC |
Membrane Material | PVDF | PVDF | |
Membrane pore size | 0.03μm | 0.03μm | |
Inner diameter of the hollow fiber | 0.7 mm | 0.7 mm | |
Outer diameter of the hollow fiber | 1.3mm | 1.3mm | |
Turbidity of Permeating water | ≤ 0.2NTU | ≤ 0.2 NTU | |
SDI value of permeating water
|
≤ 3 | ≤ 3 | |
Flux rate of purified water (0.10MP,20℃) |
≥1000L/H | ≥3000L/H | |
Typical Process
|
Temperature Range | 5-45 ℃ | 5-45 ℃ |
PH Value Range | 2-13 | 2-13 | |
Permeating Flux rate for different Water |
40 - 80 l/m2/hr | 40 -80 l/m2/hr | |
Operating Pressure | ≤0.12 MPa | ≤0.12MPa | |
Maximum Inlet Pressure | 0.2 MPa | 0.2MPa | |
Backwashing flux rate |
1.5-2.0 times of Permeating Flux |
1.5-2.0 times of Permeating Flux |
|
Backwashing times | Once per 30-120 minutes | Once per 30-120 minutes | |
Chemical cleaning online during backwashing | Once per 7-14 days | Once per 7-14 days |
The structure as the following:2.2.2 type A of 8 inches UF module.
Size and weight
|
Model | KH-UF-8040W-PVDF | KH-UF-8060W-PVDF |
Module Diameter ( A, mm) | Φ200 mm | Φ200 mm | |
Module Length ( B, mm) | 1220 mm | 1640 mm | |
Module Length (C, mm) | 1365 mm | 1785 mm | |
Size of Inlet/Outlet | DN50 | DN50 | |
Operating Type | Outside to Inside | Outside to Inside | |
Membrane Area | 30 m2 | 45 m2 | |
Dry weight of the module | 20 Kg | 35 Kg | |
Parameters |
Shell material | UPVC | UPVC |
Membrane Material | PVDF | PVDF | |
Membrane pore size | 0.03μm | 0.03μm | |
Inner diameter of the hollow fiber | 0.7 mm | 0.7 mm | |
Outer diameter of the hollow fiber | 1.3mm | 1.3mm | |
Turbidity of Permeating water | ≤ 0.2NTU | ≤ 0.2 NTU | |
SDI value of permeating water
|
≤ 3 | ≤ 3 | |
Flux rate for of purified water (0.10MP,20℃) |
≥ 3600L/H | ≥ 5400L/H | |
Typical Process
|
Temperature Range | 5-45 ℃ | 5-45 ℃ |
PH Value Range | 2-13 | 2-13 | |
Permeating Flux rate for different Water |
40 - 80 l/m2/hr | 40 -80 l/m2/hr | |
Operating Pressure | ≤0.12 MPa | ≤0.12MPa | |
Maximum Inlet Pressure | 0.2 MPa | 0.2MPa | |
Backwashing flux rate |
1.5-2.0 times of Permeating Flux |
1.5-2.0 times of Permeating Flux |
|
Backwashing times | Once per 30-120 minutes | Once per 30-120 minutes | |
Chemical cleaning online during backwashing | Once per 7-14 days | Once per 7-14 days |
2.2.3 type B of 8 inches UF module. The structure as the following:
Size and weight
|
Model | KH-UF-SFX2860-PVDF | KH-UF-SFX2880-PVDF |
Module Diameter (OD, mm) | Φ225 mm | Φ225 mm | |
Module Length ( L1, mm) | 1500 mm | 2000 mm | |
Module Length (L2, mm) | 1630 mm | 2130 mm | |
Module Length (L3, mm) | 1820 mm | 2320 mm | |
Module Length (L , mm) | 1860 mm | 2360 mm | |
Operating Type | Outside to Inside | Outside to Inside | |
Membrane Area | 52 m2 | 77 m2 | |
Dry weight of the module | 42 Kg | 62 Kg | |
Parameters |
Shell material | UPVC | UPVC |
Membrane Material | PVDF | PVDF | |
Membrane pore size | 0.03μm | 0.03μm | |
Inner diameter of the hollow fiber | 0.7 mm | 0.7 mm | |
Outer diameter of the hollow fiber | 1.3mm | 1.3mm | |
Turbidity of Permeating water | ≤ 0.2NTU | ≤ 0.2 NTU | |
SDI value of permeating water
|
≤ 3 | ≤ 3 | |
Flux rate of purified water (0.10MP,20℃) |
≥ 6500L/H | ≥ 8000L/H | |
Typical Process
|
Temperature Range | 5-45 ℃ | 5-45 ℃ |
PH Value Range | 2-13 | 2-13 | |
Permeating Flux rate for different Water |
40 - 80 l/m2/hr | 40 -80 l/m2/hr | |
Operating Pressure | ≤0.12 MPa | ≤0.12MPa | |
Maximum Inlet Pressure | 0.2 MPa | 0.2MPa | |
Backwashing flux rate |
1.5-2.0 times of Permeating Flux |
1.5-2.0 times of Permeating Flux |
|
Backwashing times | Once per 30-120 minutes | Once per 30-120 minutes | |
Chemical cleaning online during backwashing | Once per 7-14 days | Once per 7-14 days |
The whole installation and application process of our MBR modules are described as the following photo:
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