Hollow fiber ultrafiltration membrane 5, hollow fiber ultrafiltration membrane

Hollow fiber ultrafiltration membrane is a type of ultrafiltration membrane. It is one of the most mature and advanced ultrafiltration technologies. Hollow fiber is divided into outer diameters:

and inner diameter, the hollow fiber tube wall is covered with micropores, and the pore size is expressed in the molecular weight of the retained substance, and the molecular weight can reach thousands to tens of thousands. The raw water flows under pressure on the outside of the hollow fiber membrane or in the inner cavity, which constitutes the external pressure type and the internal pressure type, respectively. Ultrafiltration is a dynamic filtration process, in which the trapped substances can be discharged with the concentrated liquid and can be operated continuously for a long time.

Ultrafiltration membrane is one of the earliest polymer separation membranes developed.

Hollow fiber membrane refers to a fibrous membrane with a self-supporting effect. Hollow fiber membrane is a fiber filament processed into a hollow cavity with polysulfone and dimethylacetamide as raw materials, and then divided by a highly permeable polymer, which has selective permeability characteristics. Because water vapor, hydrogen, ammonia, and carbon dioxide permeate more quickly, while methane, nitrogen, argon, oxygen, and carbon monoxide permeate more slowly, the fast permeation is separated from the slow permeation.

The outer diameter of hollow fiber filament is usually 500 600 pum and the inner diameter is 200 300 pum, which is made into 3-6 meter fiber bundles and packed into a high-pressure resistant metal shell, one end of the fiber bundle is sealed, and the other end is bonded together with a special formula of epoxy resin.

Is hollow fiber ultrafiltration membrane needed? Or is there a offer? I have ultrafiltration membranes from Hyde Neng. Let's talk about it.

Principle of hollow fiber ultrafiltration membrane:

Ultrafiltration is a sieving process related to the size of the membrane pore, with the pressure difference between the two sides of the membrane as the driving force, with the ultrafiltration membrane as the filter medium, under a certain pressure, when the stock solution flows through the membrane surface, many small micropores densely covered on the surface only allow water small molecule substances to pass through and become permeable liquid, and the volume of the substance in the stock solution larger than the micropore size on the membrane surface is intercepted on the inlet side of the membrane to become a concentrate, so as to achieve the purpose of purification, separation and concentration of the stock solution.

Structural characteristics of hollow fiber ultrafiltration membrane:

1.Toray's ultrafiltration membranes for water treatment are made of patented modified polymaple or polyether pei, which has good hydrophilicity, chemical stability, mechanical strength, and good oxidation resistance. The newly developed molecular reforming structure polyether alum material hollow fiber ultrafiltration membrane has permanent hydrophilicity, stronger chemical resistance and mechanical strength, and better oxidation resistance.

2.The extremely thin dense layer and asymmetrical sponge support structure allow for minimal deep membrane fouling and maximum membrane cleaning recovery efficiency.

3.There are a variety of inner diameters of membrane filaments to choose from, which are suitable for different inlet water quality and can achieve zero discharge of wastewater;

Characteristics of hollow fiber ultrafiltration membrane:

1. When the inlet water quality changes greatly, the effluent water quality is still stable and has good water source adaptability.

2. The operation mode is flexible and the process adaptability is strong. The unique single-pass cross-flow filtration, dead-end filtration, and circulation of the Coriolis ultrafiltration system.

The 3 operation modes of cross-flow filtration can be freely switched for different water quality or water quality changes, and the process is highly adaptable.

3. Good anti-pollution ability, long-lasting and stable operation. Patented modified membrane material, unique asymmetrical structure, advanced.

The manufacturing process determines its excellent anti-pollution ability, so that the operation is more stable.

4. The cleaning interval is long, and the cleaning recovery is thorough. The excellent anti-fouling ability determines its longer cleaning cycle and high flow rate.

The cyclic cleaning mode also makes cleaning recovery easier and more thorough.

5. The membrane modules are arranged in parallel rather than in series. This prevents the accumulation of particulate matter between membrane connections during backwashing, and makes it easy to maintain each membrane, making it easy to reserve space for future system expansions.

1.Introduction to polypropylene hollow fiber membranes.

Polypropylene hollow fiber membrane (PP) is the latest generation of membrane separation material in the world. Compared with other ultrafiltration membranes such as polysulfone and cellulose acetate, it has the advantages of high strength, acid and alkali resistance, bacterial corrosion resistance, good temperature resistance, non-polar surface, strong anti-pollution ability, uniform micropores, and large flux per unit area.

2.High strength of the membrane:

Because the preparation method of polypropylene hollow fiber membrane adopts the film making method of "melt extrusion and stretch molding", the polypropylene macromolecule is regularly oriented, so the strength of the film is high, and the film is not easy to break in the process of high-intensity aeration and regular chemical cleaning.

3.The chemical stability of the membrane is good

In the production process of polypropylene hollow fiber membrane, no additives and pathogens are added, so the chemical stability is good, and strong acid or strong alkali can be used for cleaning. It can be cleaned with a chlorine-based disinfectant to remove a large amount of microbial contamination from the membrane surface. Good flow recovery after chemical cleaning.

4.The main performance indicators of Tengxiang film.

Membrane material: PP polypropylene.

Outer diameter: 500 m

Membrane wall thickness: 40-50 m

Membrane pore size: air permeability: >?s?cmhg）

Longitudinal strength: 120 MPa

Porosity: 40-50%.

Effluent turbidity: <

Design Flux: Three-layer.

Membrane area: 3-layer 11m2 pieces.

Operate under negative pressure. Tengxiang PP hollow fiber microfiltration membrane performance parameters:

1.Membrane material: Poly-Propelene (PP).

2.Micropore diameter: average m

3.Inner diameter of hollow fiber membrane Wall thickness: 320 40 m

4.Membrane breaking strength: 120MPa

Technical parameters of TXM-MBR-8-PP membrane module (PP hollow fiber microporous membrane).

1.Membrane area: 8 m2

2.Normal working pressure:

3.Suitable sludge concentration MLSS(mg L): 8000-12000 mg L

4.Working mode: 12mins work, stop 3mins

5.Design processing capacity: M3 D film.

Technical characteristics of TXM-MBR-8-PP membrane module.

1. It is made of polypropylene hollow fiber microporous membrane with high mechanical strength, which can withstand atmospheric aeration and is not easy to break the filament.

2. It has a unique membrane weaving structure, and during use, the root of the membrane moves as a whole, and it is not easy for the membrane filament to break due to jitter fatigue.

3. Single-piece design, easy to assemble and maintain modularly.

Ultrafiltration membrane is a kind of microporous membrane, due to its ultra-fine pore size, it can separate macromolecular substances with molecular weight greater than several thousand daltons, such as proteins, organic colloids, etc. Ultrafiltration membranes are widely used in chemical, pharmaceutical, food, environmental protection and other fields. Let's take a closer look at the knowledge of ultrafiltration membranes.

Ultrafiltration membranes typically have micropore sizes between microns and are usually made of materials such as polyester, polyether, polysulfone, polyolefin, etc. Ultrafiltration membranes are divided into two categories: achiral and chiral, the former is mainly used for the separation and extraction of proteins, pectin, sugars and other substances, and the latter is mainly used for the separation of small molecule compounds such as amino acids and nucleotides.

The separation principle of ultrafiltration membranes is based on the molecular weight of the solute and the concentration in the solution. Relatively small molecules can be permeabilized downward through the ultrafiltration membrane, while larger molecules are isolated above. In addition, ultrafiltration membranes also have the effect of removing dissolved and suspended substances in water, and can treat water bodies with water pollution such as microorganisms, viruses, organic matter, and heavy metals.

Ultrafiltration membranes are widely used, such as the preparation of biological products, beverages, food, medicines, cosmetics, etc. In addition, ultrafiltration membranes can also be used in seawater desalination, wastewater treatment, environmental monitoring, etc. Compared with traditional filtration methods, ultrafiltration membranes have the advantages of high separation efficiency, easy operation, small space occupation, and continuous and automatic production.

As one of the top ten brands of water purifiers, Lisheng's whole-house water purification system is composed of ultrafiltration water purifiers and end ultrafiltration partners, and ultrafiltration water purifiers are installed at the main pipe of tap water to centralize the treatment of drinking water in the whole house. Through customization and matching with different end partners, Lisheng whole house water purification perfectly matches the personalized water needs of different families.

At present, the classic combination of pre-filter + whole house pipeline ultrafiltration water purifier + ultrafiltration companion + water softener + wall-mounted pipeline machine for my household has obviously changed the water quality, and the water quality at home has improved a lot.

The whole house pipeline ultrafiltration water purifier is the core of the whole system, using the PVC alloy capillary ultrafiltration membrane technology independently developed by Lisheng Purification Group, the filtration accuracy is as high as Xiaoshan microns, only 1/10,000 of a hair, which can effectively separate pollutants such as rust, sediment, bacteria, colloids, algae microorganisms and other pollutants in tap water, and retain natural minerals and trace elements that are beneficial to the human body, providing safe and healthy drinking water and water for the whole family.

When the Lisheng whole-house ** water purifier centrally purifies the drinking water of the whole house, it will be diverted to different water places, and different end ultrafiltration partners can be installed at this time to realize the quality of water supply for the whole house and comprehensively improve the quality of life of family water purification. For example, install a Lisheng water softener in the bathroom to make bathing and laundry more comfortable; Install an ultrafiltration companion in the kitchen to remove the residual discoloration and odor in the water, making the drinking water more sweet and ......tasty

(1) High-precision integrated continuous preparation technology and equipment of hollow fiber nanofiltration membrane

In order to solve the problem that the functional layer of hollow fiber nanofiltration is easy to be damaged in the continuous preparation process of wide-sock embedded interface polymerization, a multi-functional nozzle and an integrated membrane making device for phase conversion-interface polymerization were designed, focusing on breaking through the phase conversion and forming of hollow fiber-based membrane and the interface polymerization of the separation layer or chemical cross-linking synchronous processing technology, establishing the phase conversion synchronous interfacial polymerization chemical cross-linking membrane making process, real-time monitoring and control system, and breaking through the key technology of accurate control of the structure and pore size of the separation layer under the surface condition of small radius of curvature. Efficient preparation of hollow fiber nanofiltration membranes is realized.

(2) Preparation and application technology development of precise separation and functional hollow fiber nanofiltration membrane

In view of the unique process requirements for the preparation of hollow fiber nanofiltration membranes, new interfacial polymerization monomers, modifier designs and green synthesis processes were developed, and efficient interfacial polymerization processes and control methods were established for the surface characteristics of new monomers and hollow fiber membranes, so as to obtain high-performance raw materials for hollow fiber nanofiltration membranes such as anti-pollution, antibacterial, chlorine-resistant, solvent-resistant, acid-alkali resistance, etc. The regulation theory of membrane pores at the sub-nanometer scale was developed, the structure-activity relationship between membrane material, membrane pore structure and membrane sieving performance was established, and a high-precision nanofiltration membrane microstructure regulation method based on pore size and function was established. We have developed low-pressure and high-flux hollow fiber nanofiltration membrane products, integrated equipment and space drinking water guarantee system for drinking water safety, and established a green application process system for hollow fiber nanofiltration membrane in new fields such as antibiotic concentration and purification, drug intermediate separation, and solvent filtration.

Research and development of acid and alkali resistance, organic solvent resistance, high temperature resistance and other special hollow fiber nanofiltration membranes, integrated equipment and special separation process systems.