REDFIL Low Pressure Salt Water Filter Membrane Manufacturers Water Treatment Nano Membrane China MNF-2540 Nanofiltration Membrane Nanofiltration System
Product Description
MNF Spiral-wound NF Series Nanofiltration (NF) Membrane
The MNF spiral-wound NF series incorporates advanced support layer and elective layer collaborative regulation technology, along with a high-flux design. Primarily utilizing polyamide as the main membrane material, with quantitative regulation of molecular weight cut-off (MWCO) ranging from 200 to 400 Da. This series operates efficiently at low pressure, achieving a single module recovery rate of approximately 15%. It excels in removing diverse impurities from wastewater, including organic matter, microorganisms, viruses, turbidity, chromaticity, heavy metals, COD, and ammonia nitrogen. Even after fouling, its performance can be restored through cleaning, ensuring prolonged membrane service life and cost-effectiveness.
Characteristic:
Operation at low pressure; High tolerance to fluctuations in raw water quality; Anti-fouling
Applications:
The membrane is suitable for lithium extraction from salt lakes, zero discharge of wastewater, reuse of reclaimed water, protein, and amino acid concentration in
Product Parameters
| Model |
MNF-1812 |
MNF-2540 |
MNF-4040 |
MNF-8040 |
Effective membrane Area
ft²(m²) |
4.20(0.38) |
23.68(2.2) |
92.40(8.40) |
400.00(36.40) |
Ave.Permeate
GPD
(m³/d) |
87(0.33) |
502(1.90) |
1918(7.26) |
8311(31.46) |
| Stable Rejection |
>98%(2000 ppm MgSO4) |
| Feed Spacer Thickness mil (mm) |
31(0.79) |
| Testing Conditions: All data is collected under operating pressure of 0.69 MPa,25ºC, and pH7. |
| MembraneParameters:Pore diameter:0.5 nm,MWCO:200-400 Da,PWP:5-6 LMH/bar |
| Usage Conditions: Max. operating pressure:600 psi, Max.operating temperature:45ºC,pH value range of feed water during continuous operation:3-11,Allowable concentration of free chlorine:<100 ppm |
| Notes:1.The permeate flow of a single membrane element may vary within the range of±15%;2. The daily cleaning of the membranemoduleisusually water flushing, and chemical cleaning (acid /alkali cleaning)is needed every 10 to 60 days. |
*The above parameters serve as reference values, and element parameters should be appropriately adjusted based on specific operational conditions.
*Please note that the company's products undergo continual optimization, and actual performance data may vary from those presented in the product catalog. Nanjing Weihua Membrane Technology Co., Ltd. reserves the final interpretation rights.
Nanofiltration Membrane
Customized Preparation of High-precision NF Membranes
* "Molecular Encapsulation" Technology
Drawing inspiration from controlled-release mechanisms in pharmaceuticals, the company pioneered the concepts of "molecular encapsulation" and "nanocapsules" in membrane technology. By encapsulating functional modifiers and orchestrating their release at precise intervals, we can achieve synchronized structural adjustments and functional enhancements in membranes.
By leveraging the innovative "Molecular Encapsulation" Technology, precise control over membrane pore size and charge enables the tailored production of nanofiltration membranes for effective ion separation across various systems.
High-performance Hollow Fiber NF Membranes
* Hierarchical Structure Synchronous Construction Technology
Commencing with an exploration of polymer chemical structures, molecular simulations, and solubility parameter calculations were employed to quantify polymer compatibility. This approach theoretically overcomes the challenge of interface compatibility in bilayer membranes. Through co-extrusion and the integration of composite structures from two different materials, a significant reduction in membrane material costs and streamlined membrane preparation processes have been achieved.
* Solve interface compatibility issues and ensure stable operation under harsh conditions
* Significantly simplify the membrane preparation process
Application Cases
Industrial Environmental Protection Field Cases
-Lithium Extraction from Salt Lakes
The extraction of lithium from salt lake brine is often hindered by a high magnesium-to-lithium ratio, which demands extremely high separation accuracy in NF membranes. Our company's-high-precision NF membranes for lithium extraction have been put into use in a reputable engineering company, demonstrating a similarly strong performance to that of internationally-renowned brand products, providing a competitive advantage
-Coal Chemical Wastewater Treatment
For coal chemical wastewater with high total salt content, primarily composed of Na2SO4 and NaCl,an integrated process was devised. This process combines reverse osmosis membrane concentration, NF membrane salt separation, and freeze crystallization as technology the wastewater treatment challenges effectively
-High-salinity Wastewater Resource Utilization
Our company has developed a solution to tackle the challenging separation issue of similarly sized and similarly valenced ions in chemical wastewater. We have created high-precision separation membranes and a nearly zero discharge process centered on NF membranes. Our solution minimizes wastewater emissions by 90% for enterprises and provides significant savings in environmental costs.
-Treatment of Landfill Leachate
To address the presence of complex pollutants in landfill leachateandtheshortlifespan of traditional membranes, our company has developed an anti-fouling membrane that has replaced well-known competitive brands in wastewater treatment plants. Our membrane system has been operating stably for 2 years, surpassing all indicators of the competitive membranes.
-Pesticide Wastewater Treatment
In a specific case, A certain enterprise regularly discharges phosphorus-containing wastewater from pesticide production, leading to localized water body eutrophication. With stricter sewage discharge regulations threatening production shutdown, our company devised a secondary NFdeeptreatmentprocess tailored to the unique qualities of the wastewater. The treated water now meets standards, cutting wastewater treatment costs by 60% and reducing carbon emissions by 72%.
Life and Health Field Cases
-Water Purification
To address significant variations in surface water quality across regions, our company has designed a household water purification membrane product that customizes NF membrane basedonwaterquality. Our product offers both flat spiral-wound membrane elements and hollow fiber membrane elements.
-Municipal Water Treatment
In response to the growing need for a high-quality municipal drinking water supply, our company has developed advanced hollow fiber NF membranes for water treatment. Building on this innovation, a streamlined "coagulation + hollow fiber NF" process yields excellent treatment outcomes with minimal pre-treatment requirements and high recovery rates.
-Solvent Recovery
To address inefficiencies and high costs associated with traditional methods used for separating small molecular drugs and solvents, our company has developed high-precision solvent-resistant hollow fiber NF membrane products. Our products enable efficient separation and recovery of these substances, thereby reducing solvent and energy costs by 50%.
-Biopharmaceutical Purification
The biopharmaceutical industry has an enormous demand for drug separation and purification. Traditional purification processes such as extraction and salt washing are slow, expensive, and cause heavy pollution. In response to these problems, our company has developed an NF membrane purificationprocessthatsignificantly reduces the purification process, improves efficiency, and saves millions of yuanperyearinpurification costs for enterprises
Company Profile
The company has a research and development and production area of nearly 2,000 square meters, production equipment, analysis and testing instruments with a total value of nearly 10 million yuan, and has built a full-chain industrialization platform for the research and development, pilot production, production and testing of core products such as flat roll nanofiltration membranes and hollow fiber nanofiltration membranes.
The company's R&D team has focused on nanofiltration membrane research for more than ten years. With its unique "molecular encapsulation" patented technology, it has developed high-precision nanofiltration membranes that can quantitatively control membrane pore size and charge. In addition, it continues to launch special nanofiltration membrane products such as acid-resistant membranes, alkali-resistant membranes, solvent-resistant membranes, and high-temperature-resistant membranes for different application scenarios, which have been successfully applied in drinking water purification, biomedicine purification, industrial wastewater treatment, salt lake lithium extraction, and other fields.
Production Workshops
FAQ
Q1: What are the features of NF?
Highly Precise Separation
Low Energy Consumption
Convenient Operation
Fouling resistant
Long service life
Q2: What service is available in your company?
The products cover NF membrane elements and processes with various materials and MWCOs. Weihua provides solutions based on NF membranes for wastewater recycling, material separation, etc. globally. Our service covers multiple fields such as the chemical industry, biomedicine, environmental protection, and energy. Our products are applied in household water treatment, municipal water treatment, lithium extraction from salt lakes, zero discharge of high salt wastewater, purification and concentration of high-value products, organic solvent recovery, and material separation under harsh acid systems. We undertake sewage treatment and zero discharge resource utilization projects in the pharmaceutical, electronics, food, textile, papermaking, and landfill leachate treatment industries.
Q3: What does the Salt Rejection Ratio mean?
The Salt rejection describes the quality of salt removed from the NF membrane feed water stream as a percentage. It's one of the key elements of the NF membrane quality, however, other essential elements such as NF membrane performance durability, stability, application scope in different regions, and permeate flow output at the same pressure will all be important factors to judge the quality of the membrane.
Q4: How to select NF?
Firstly, check for the presence of corrosive substances, such as solvents, acids, and bases, in the separation system. If any are found, it is necessary to select special separation membranes. Next, determine the size of the substance to be separated and accordingly choose from the available NF membranes, categorized as LNF (large), MNF (medium), and SNF (small) models.
Q5: Under what circumstances can hollow fiber NF membranes be chosen?
High presence of organic contaminants
High residual chlorine content
Limited factory space
Municipal tap water treatment
Q6: What are the precautions when using NF?
1. Before use, pre-treatment is necessary to reduce fouling, scaling, and membrane degradation, thereby enhancing the operational efficiency of NF membrane elements.
2. Before use, the system should be flushed with purified water or product water for approximately 30 minutes.
3. The NF membrane elements are shipped with stored preservative solution, which consists of a sodium bisulfite (NaHSO3) water solution with a concentration of 0.5-1%. The pH value of the preservative solution should be tested every month, and if the pH≤3, the preservative solution should be promptly replaced.
4. Membrane components that are temporarily not in use should be sealed after being filled with a preservative solution. They should be stored in a flat, clean area on the ground, free from corrosive and contaminating substances, and kept away from indoor cold and heat sources. The storage environment temperature should be controlled within the range of 5-40ºC, with the recommended optimal storage temperature being 15-30ºC
Q7. Are you a factory?
Yes, we are not only just a factory but also have a professional service team, that includes sales, technical staff, QC, after-sales staff, etc.
Q8. How about your delivery time?
Generally, it will take one week after receiving your advance payment. The specific delivery time depends on the items and the quantity of your order.
Q9. Do you test all your goods before delivery?
Yes, we have 100% test before delivery.
){kind=link}