Reverse osmosis membrane

Operating principle

Reverse osmosis membrane adopts the principle of high pressure reverse osmosis physical screening, overcomes the natural osmotic pressure of water body by high pressure external force, and realizes the accurate separation of impurities and water molecules. It belongs to high precision pure physical filtration process.

Under the action of high pressure pump, the raw water enters the flow channel of membrane element. The water flows at high speed on the surface of membrane. Only water molecules and trace harmless small molecules are allowed to pass through the membrane layer to form purified water; The macromolecular impurities such as salt, heavy metal, bacteria, colloid and organic pollutants left in the water cannot penetrate the membrane pore and are concentrated and discharged with the residual water to form concentrated water. Completely separate pure water and impurities in the whole process, and continuously produce high purity clean water. During the operation of the equipment, the water flow will scour the membrane surface at a high speed, effectively reducing the accumulation of pollutants. With the coordination of regular chemical cleaning, the high demineralization and high water permeability can be maintained for a long time.

Product structure

Membrane element adopts roll composite structure, multi-layer precision composite molding, stable structure, strong pressure resistance and uniform flux. Core structure configuration is as follows:

• Polyamide composite membrane: High-end aromatic polyamide material is adopted, with dense desalting layer on the surface and porous support layer composite structure, featuring high desalting accuracy, strong hydrophilic property, large water flow, acid and alkali cleaning resistance and excellent compression tightness.
• Thickened inlet isolation net: customized and widened flow path isolation net, uniform water flow distribution, effective increase of turbulence effect, reduction of accumulation and adsorption of pollutants and colloid, reduction of pollution blocking rate on membrane surface, and improvement of anti-pollution capacity.
• Central water collecting pipe: High-strength ABS central water collecting pipe is characterized by smooth water passing, no deformation under pressure, quick collection of pure water through the membrane layer, high water delivery efficiency and no water loss.
• Sealing rubber ring assembly: imported high-quality waterproof sealing rubber ring with strong sealing property, eliminating water leakage and mixing between raw water and pure water, and ensuring the stability and compliance of effluent quality and purity.
• Glass fiber protective layer: the outer layer of glass fiber is wound and reinforced, which is resistant to pressure, explosion, impact and abrasion. It can effectively protect the internal film structure and adapt to the continuous operation under high pressure.
• Precision end cover structure: high-strength anti-skid end cover, suitable for installation of various membrane shells, accurate docking, convenient assembly and disassembly, no looseness or water leakage during operation.

Product range

Based on different water quality working conditions and purification demands, multiple series of special RO membranes are subdivided to accurately adapt to various water treatment scenes:

• Low-pressure conventional RO membrane: with strong universality, low operating pressure and low energy consumption, it is applicable to tap water, groundwater and other low-pollution conventional raw water, and widely used in common industrial pure water and commercial water purification equipment.
• Ultra-low pressure energy conservation RO membrane: Ultra-low operating pressure, large water production, energy conservation and consumption reduction, suitable for small and medium-sized pure water system, effectively reducing energy consumption of high pressure pump, with higher operation economy.
• Anti-pollution RO membrane: the membrane surface is improved in hydrophilic property, the charge is close to neutral, the membrane is resistant to organic matter and microbial pollution, it is not easy to scale and block the membrane, it is easy to clean and recover, and it is specially used for reclaimed water recycling, sewage pretreatment and high impurity surface water conditions.
• Desalination RO membrane: high pressure and high desalting design, high salinity resistance, high permeability and high desalting rate, specially used in seawater and brackish water desalination and purification scenes.
• High-pressure concentrated water RO membrane: high pressure resistance, concentration pollution resistance, suitable for concentrated water secondary concentration, zero discharge pretreatment, and high-salt wastewater treatment.

Product advantages

H6>Self-research and self-production of the whole chain, high quality controllability and price ratio

Independent R&D and production of diaphragm, realizing the integrated self-production and self-operation of membrane elements and pressure housing core accessories, and the whole process from raw material selection, structural design, process processing to finished product pressure test and detection is under the control of the company.

H6>Ultra-high demineralization rate, stable effluent quality

High-precision nano-scale filtration structure can stably remove salt, heavy metal, bacteria, virus and organics in water. The conventional demineralization rate is ≥ 99%. The outlet resistivity is stable, which can meet the high standard water demand of pure water and ultra-pure water.

H6>High flux, low energy consumption and low operation cost

The diaphragm has excellent hydrophilic property, sufficient water flux and small water resistance, which can effectively produce water under low pressure, effectively reduce the operating load of high pressure pump, save energy and reduce consumption. Under the same working condition, the water production is superior to that of common membrane elements.

H6>Anti-pollution and easy cleaning, long service life

Optimized flow path design+modified hydrophilic membrane surface, not easy to absorb colloid, microorganism and organic impurities, and the pressure difference rises slowly during long-term operation; Wide acid-resistant and alkali-resistant cleaning range, high recovery rate of flux and desalting rate after cleaning, and effective prolongation of service life.

H6>Pressure and temperature resistance, wide adaptability to working conditions

The overall rolling process is excellent, the structure is stable, the compression tightness is strong, the high and low temperature, acid and alkali cleaning conditions are resistant, the film stripping, deformation and attenuation problems are not easy to occur, and it is suitable for continuous operation for 24 hours.

H6>Universal specification, strong adaptability

4040、 The 8040 standard universal size is compatible with all brand membrane shells and pure water equipment on the market. It is easy to replace and install, without changing the equipment and parameters. It can be put into production by direct replacement.

Application Scenario

As the core consumable for water treatment, demineralization and purification, it comprehensively covers various industrial, commercial and livelihood water purification scenes. The core applications are as follows:

• Industrial pure water ultra-pure water preparation: electronic, photovoltaic, semiconductor, electroplating, chemical industry pure water, ultra-pure water system core demineralization filtration;
• Drinking water purification project: commercial water purification equipment, barreled water production, community drinking water, centralized water supply purification in the plant area;
• Reclaimed water recycling treatment: advanced treatment and recycling of industrial wastewater and domestic sewage, removal of salt impurities and recycling of water resources;
• Desalination of brackish water in sea: Desalination of water sources in islands, coastal areas and saline-alkali areas converts high salt raw water into available clean water;
• Pharmaceutical food water purification system: preparation of purified water for food and beverage, pharmaceuticals and medical devices to ensure clean and up-to-standard water quality;
• Boiler softening pretreatment: boiler make-up water and circulating water pretreatment and demineralization to reduce water hardness and protect back-end equipment from scaling.

Technical parameters

• General Specification 4040 (Small), 8040 (Industry Standard)
• Stable demineralization rate ≥ 99.3% (steady state under working condition)
• Single water yield 800G-4000G/day (by specification and model)
• Operating pressure: 1.0MPa - 1.6MPa (starting from 0.8MPa for LP model)
• Applicable water temperature: 5 ℃ - 45 ℃
• Applicable pH range 2.0 - 11.0 (operating); Cleaning)
• Membrane material Aromatic polyamide composite membrane
• Filtration pore size 0.0001 micron nano-pore
• Normal service life of 2-3 years (floating according to raw water quality and operation&maintenance)
• Core functions: demineralization and purification, sterilization and impurity removal, turbidity reduction and quality improvement, and water purification

After-sales guarantee

Provide RO membrane one-stop model selection and matching, replacement guidance, cleaning, operation and maintenance, technical query and a full set of services to fully guarantee stable water production of pure water system:

• Precise matching of low pressure, anti-pollution and seawater desalination special membrane models according to equipment specifications, raw water quality and water production standards for free;
• Delivery of new original membrane elements and dry membrane wet membrane as required, strict ex-factory inspection, qualified demineralization rate and flux, no refurbished membrane or defective membrane;
• Provide professional installation and replacement guidance, equipment commissioning and parameter calibration, and assist in quickly restoring normal water production of equipment;
• Hour technical response, remote troubleshooting of common problems such as membrane plugging, reduced water production, low demineralization rate and substandard water quality;
• Provide lifelong cleaning scheme, maintenance skills, replacement cycle suggestions and system operation and maintenance optimization value-added services for membrane elements.