行业组件数据 · 2026

膜片

Membrane leaves are semi-permeable sheets used in reverse osmosis systems to separate dissolved solids from water through pressure-driven filtration.

技术定义与适配语境
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Membrane leaves are the active filtration elements within spiral-wound RO membrane modules, consisting of multiple layers including a semi-permeable polyamide active layer, polysulfone support layer, and feed spacer. These leaves are wound around a central permeate tube to create high-surface-area filtration modules that remove 95-99% of dissolved salts, organic molecules, and microorganisms from feed water under pressures of 150-1200 psi.

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组件规格

定义
Membrane leaves are the active filtration elements within spiral-wound RO membrane modules, consisting of multiple layers including a semi-permeable polyamide active layer, polysulfone support layer, and feed spacer. These leaves are wound around a central permeate tube to create high-surface-area filtration modules that remove 95-99% of dissolved salts, organic molecules, and microorganisms from feed water under pressures of 150-1200 psi.
工作原理
Membrane leaves operate on the principle of reverse osmosis, where hydraulic pressure exceeding the osmotic pressure of the feed solution forces water molecules through a semi-permeable membrane while rejecting dissolved ions, molecules, and particles. The asymmetric membrane structure allows water passage while blocking contaminants through size exclusion, charge repulsion, and diffusion limitations.
材料
Thin-film composite polyamide active layer (0.2-0.4 μm) on polysulfone microporous support (40-50 μm)polyester non-woven fabric backing (120-150 μm)polypropylene feed spacerand polysulfone permeate carrier. Materials are selected for chemical resistancemechanical strengthand fouling resistance.
pH Range
2-11
Water Flux
15-45 L/m²·h
Active Area
7-41 m²
Salt Rejection
99.0-99.8%
Temperature Range
0-45°C
Chlorine Tolerance
<0.1 ppm
Membrane Thickness
160-240 μm
Operating Pressure
150-1200 psi
标准
ISO 11245ISO 15848DIN 19605ASTM D4194ASTM D6908

行业分类与别名

膜片 的常用贸易名称、技术标识和检索关键词。

RO membrane leavesreverse osmosis membraneswater filtration componentsspiral wound membranesdesalination membranesindustrial filtrationmembrane technologywater treatment components膜片Membrane Leaves机械和设备制造 膜片

上级产品

该组件会出现在以下整机或工业产品中。

反渗透膜元件
反渗透系统中的核心过滤组件，用于从水中分离溶解性固体和污染物。
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FMEA · 风险与缓解

诱因 → 失效模式 → 工程缓解

Inadequate pretreatment allowing scaling minerals to reach membrane surface->Reduced water flux and increased pressure requirements->Implement proper water softening, antiscalant dosing, and regular cleaning cycles
Oxidant exposure (chlorine, ozone) degrading polyamide active layer->Loss of salt rejection capability and membrane integrity->Install dechlorination systems, maintain oxidant levels below 0.1 ppm, use antioxidant treatments
Biological growth in feed water due to inadequate disinfection->Biofouling leading to increased pressure drop and reduced efficiency->Implement UV sterilization, chlorination/dechlorination systems, and regular biocide treatments

工业生态与工程逻辑

兼容对象
Spiral Wound RO Membrane ElementsIndustrial RO SystemsDesalination PlantsWater Treatment SystemsPharmaceutical Purification Systems
可替换件
Dow FilmtecHydranauticsTorayLG ChemKoch Membrane SystemsGE Water (now SUEZ)
0
Membrane fouling and scaling
1
Chemical degradation from oxidants
2
Mechanical damage from pressure spikes
3
Biological contamination
4
Performance degradation over time
5
Incompatible cleaning chemicals

合规与检测

tolerance
±5% on salt rejection, ±10% on water flux, dimensional tolerance ±2% on all critical dimensions
test method
ASTM D4194 for salt rejection testing, ASTM D6908 for flux testing, ISO 11245 for material compatibility, and manufacturer-specific performance validation protocols

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技术文档
4/5
制造能力
4/5
可检验性
5/5
供应商透明度
3/5

这些分值是采购评估维度示例，不代表真实客户评分、具体国家买家反馈或实时询盘。

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磨料介质/工作面
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常见问题

What is the typical lifespan of membrane leaves in industrial RO systems?

Membrane leaves typically last 3-7 years in industrial applications, depending on feed water quality, pretreatment effectiveness, operating conditions, and maintenance practices. Proper cleaning and monitoring can extend membrane life.

How do membrane leaves differ from other filtration membranes?

Membrane leaves are specifically designed for reverse osmosis applications with tighter pore sizes (0.0001 μm) compared to ultrafiltration (0.01-0.1 μm) and microfiltration (0.1-10 μm) membranes, enabling removal of dissolved ions and small molecules rather than just suspended particles.

What causes membrane leaf fouling and how is it prevented?

Fouling occurs from scaling (mineral deposits), organic accumulation, biological growth, and colloidal particles. Prevention includes proper pretreatment (softening, filtration, disinfection), maintaining optimal flow rates, regular cleaning with appropriate chemicals, and monitoring performance parameters.

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URN:CNFX:ME:UNIT:MEMBRANE_LEAVES