Membrane Filtration
Filtration Equipment
1. Product Overview
Membrane separation equipment uses semi-permeable polymer membranes driven by pressure difference to separate, concentrate, and purify liquids. It consists of membrane modules, high-pressure pumps, valve piping, a cleaning system, and a control cabinet. Widely used for: clarification, impurity removal, and concentration in food & beverage, biopharmaceuticals, environmental water treatment, and chemicals. Features: room temperature operation without phase change, no chemical additives, high separation precision, low energy consumption.
2. Working Principle
The feed solution is pressurized by a high-pressure pump and enters the membrane module; under the pressure difference, solvents and small molecular solutes smaller than the membrane pore size pass through the membrane to form the permeate; macromolecular substances, colloids, or particles larger than the pore size are retained to form the concentrate. The feed flows across the membrane surface in a cross-flow manner, continuously sweeping the membrane to limit fouling.
3. System Classification
By Membrane Pore Size:
Microfiltration (MF) Equipment: Pore size 0.1～10μm, retains suspended solids, bacteria / Juice sterilization, tap water fine filtration
Ultrafiltration (UF) Equipment: Pore size 0.001～0.1μm, retains proteins, colloids / Protein concentration, TCM extract purification
Nanofiltration (NF) Equipment: Pore size 1～5nm, retains divalent salts and small molecules / Desalination concentration, water softening
Reverse Osmosis (RO) Equipment: Virtually non-porous, only water passes through / Seawater desalination, pure water preparation
4. Detailed Technical Parameters
4.1 Common Materials
| Material | Applicable Components | Remarks |
|---|---|---|
| 304/316L Stainless Steel | Skid, piping, pressure vessels | Sanitary grade, corrosion-resistant, preferred for food/pharma |
| PVDF/PES/PAN | UF/MF membrane fibers/sheets | Chemically cleanable, long life |
| Polyamide (PA) | RO/NF membrane sheets | High salt rejection rate |
4.2 Typical Specification Table
| Capacity (m³/h) | Membrane Area (m²) | Operating Pressure | Installed Power | Membrane Type |
|---|---|---|---|---|
| 1～5 | 20～100 | 0.1～0.3MPa | 2.2～7.5 | UF/MF |
| 5～20 | 100～500 | 0.5～1.5MPa | 7.5～22 | NF/RO |
| 20～100 | 500～2000 | 1.0～2.5MPa | 22～110 | RO |
4.3 Design Conditions & Performance
| Parameter | Specification |
|---|---|
| Operating Temperature | 5℃～45℃ (depending on membrane material) |
| Rejection Rate | 95%～99.5% (depending on membrane type and MW) |
| Membrane Flux | 20～100 L/m²·h (depending on feed concentration) |
| Recovery Rate | 50%～80% (RO system); >95% (UF system) |
5. Electrical Parameters
| Region | Voltage | Frequency |
|---|---|---|
| China/Russia/Central Asia | 380V | 50Hz |
| Middle East/Southeast Asia/Africa | 400V / 415V | 50Hz |
| South Korea | 380V | 60Hz |
| Americas (if required) | 440V / 480V | 60Hz |
| Note: High-pressure pump, dosing pump, and CIP pump must have specified voltage/frequency; explosion-proof motors required in hazardous areas. |
6. Core Component Selection
| Component | Brand/Material | Features & Applications |
|---|---|---|
| Membrane Modules | Dow/Toray/Own brand | Spiral wound/Tube/Hollow fiber, high rejection/flux |
| High-Pressure Pump | Nanfang/Grundfos/Custom | SS multistage centrifugal pump, stable & low noise |
| Pressure Vessels | Custom matched | FRP/SS, high-pressure resistant, good end sealing |
| Control Valves | National standard/Custom | Pneumatic/Electric butterfly valves, auto flushing & operation |
7. Typical Application Fields
Food & Beverage: Juice clarification, whey protein concentration, tea polyphenol purification
Biopharmaceuticals: Antibiotic separation, enzyme concentration, WFI preparation
Environmental Water Treatment: Electroplating wastewater reuse, landfill leachate treatment
Chemical Industry: Dye desalination concentration, catalyst recovery
8. Design Standards & Certifications
| Standard | Description |
|---|---|
| GB/T 32360-2015 | Ultrafiltration membrane modules |
| GB/T 19249-2003 | Reverse osmosis water treatment equipment |
| ISO 9001:2015 | Quality Management System |
| CE / EAC / GOST-R | Available upon request for international orders |
9. Custom Optional Configurations
| Option | Details |
|---|---|
| Membrane Type & Brand | MF/UF/NF/RO, Import/Domestic brands |
| Control Method | PLC + touch screen fully automatic / Manual |
| Cleaning System | CIP system, automatic/semi-automatic |
| Special Design | Explosion-proof / Two-stage series / Energy Recovery Device (ERD) |
10. Warranty Terms
| Equipment Status | Warranty Period | Warranty Scope |
|---|---|---|
| Brand New | 12 months | High-pressure pump, pressure vessels, skid & piping, control system |
| Refurbished | 6 months | High-pressure pump, pressure vessels, skid & piping, control system |
| Idle | 3 months | Main functional components |
| Note: Membrane elements are consumables, typically warranted for 6 months after shipping or 3 months of operation (whichever comes first). |
11. Packaging & Delivery
| Item | Packaging Method |
|---|---|
| Main Skid & Piping | Tarpaulin wrapped, wooden skid base |
| Membrane Modules / Vessels | Fully enclosed wooden cases, shock-proof |
| Electrical / Pumps | Waterproof sealed packaging in wooden cases |
| Container Capacity Estimation (For reference only, subject to actual configuration): | |
| Small-medium model (≤20m³/h capacity): Approx. 1x 20'GP | |
| Large model (>20m³/h capacity): Approx. 1x 40'GP or 1x 40'OT | |
| On-site installation and commissioning guidance available. |
12. Information Required for Inquiry
12. Information Required for Inquiry Feed solution name and composition, viscosity, pH; processing capacity; separation/concentration target (MWCO or salt rejection); feed temperature; equipment status preference (new/refurbished/idle); delivery terms (FOB/CIF/DDP); destination port.