Ultrafiltration equipment for ultrafiltration membranes, what is ultrafiltration membranes?

Ultrafiltration concept. Ultrafiltration Equipment Company produces ultrafiltration membrane water purification equipment, which is widely used in water treatment and water purification equipment projects; Ultrafiltration membrane equipment technology plays an increasingly important role in the fields of reverse osmosis pretreatment, drinking water treatment, reclaimed water reuse, sterilization and turbidity removal of wine and beverages, pyrogen removal of drugs, and concentration of food and pharmaceutical preparations.

The range of ultrafiltration filter pore size and molecular weight cut-off has been vaguely defined, and it is generally considered that the filter pore size of ultrafiltration membrane is microns, and the molecular weight cut-off (MWCO) is 1,000-1,000,000 dalton. Strictly speaking, ultrafiltration membranes have a filter pore size of microns and a molecular weight cut-off of 1,000-300,000 dalton. Microporous membranes with a pore size greater than microns or a molecular weight cut-off greater than 300,000 dalton should be defined as microfiltration or fine filtration.

Generally, ultrafiltration membranes used for water treatment have a nominal molecular weight cut-off of 30,000-300,000 daltons, while ultrafiltration membranes with a molecular weight cut-off of 6,000-30,000 daltons are mostly used in the fields of material separation, concentration, sterilization and heat source removal.

Ultrafiltration equipment is to take ultrafiltration membrane as the core product, and use the interception ability of porous materials to remove impurity particles of a certain size in water in a physical interception way. Driven by pressure, small substances such as water, organic low molecules, and inorganic ions in the solution can reach the other side of the membrane through the micropores on the fiber wall, and large-sized substances such as bacteria, colloids, particulate matter, and organic macromolecules in the solution are intercepted, so as to achieve the purpose of sieving different components in the solution.

Ultrafiltration equipment is a physical sieving process that uses pressure as the driving force to separate liquids from different pore sizes of ultrafiltration membranes. Its molecular cleavage (CWCO) is generally 6,000 to 500,000 and its pore size is 100 nm (nanometers). The membrane used in ultrafiltration is an asymmetrical membrane, and the average pore size of its surface active separation layer is about 10-200, which can intercept macromolecules and colloidal particles with a molecular weight of more than 500, and the operating pressure difference is in.

Ultrafiltration membrane equipment rightleder is a kind of microporous filtration membrane technology equipment with consistent pore size specifications and rated pore size range of microns. By applying the appropriate pressure on one side of the membrane, solute molecules smaller than the pore size can be screened out to separate particles with molecular weights greater than 500 daltons and particle sizes greater than 2 20 nanometers.

The structure of ultrafiltration membranes is symmetrical and asymmetrical. The former is isotropic, without cortex, the pores are the same in all directions, and belong to depth filtration; The latter has a denser surface layer and a bottom layer dominated by finger-like structures, with a surface thickness of microns or less, and has well-arranged micropores, and the bottom layer has a thickness of 200 250 microns, which belongs to surface filtration. Ultrafiltration membranes used in industry are generally asymmetrical membranes.

The membrane materials of ultrafiltration membranes mainly include cellulose and its derivatives, polycarbonate, polyvinyl chloride, polyvinylidene fluoride, polysulfone, polyacrylonitrile, polyamide, polysulfonamide, sulfonated polysulfone, cross-chain polyvinyl alcohol, modified acrylic polymer, etc.

What is ultrafiltration equipmentUltrafiltration equipment is a water treatment filtration equipment that separates large molecules and small molecules by using the pressure difference as the driving force, which has many characteristics such as convenient operation and small footprint, and has been favored by many of our customers, so it is also widely used in many industries of water treatment, so how does the ultrafiltration equipment work? What are the steps in this process? Let's understand the information through the process flow diagram of ultrafiltration equipment design.

Process flow diagram for ultrafiltration equipment designUsually the process flow of our ultrafiltration equipment is as follows: raw water tank, multi-media pretreatment filter (usually only one layer of quartz sand filter material) activated carbon filter, dosing system, water softener, ultrafiltration device, water storage bucket sterilization, water storage tank.

Ultrafiltration equipment.

The membrane in ultrafiltration equipment is a microporous filtration membrane with consistent pore size specifications and a nominal pore size range of microns. The membrane filtration method with ultrafiltration membrane and pressure difference as the driving force is ultrafiltration membrane filtration.

Ultrafiltration membranes are mostly made of acetate fibers or polymer materials with similar properties. It is suitable for the separation and concentration of solutes in solution, and is also commonly used for the separation of colloidal suspensions that are difficult to complete by other separation technologies, and its application field is expanding. Membrane filtration driven by pressure difference can be divided into three categories: ultrafiltration membrane filtration, microporous membrane filtration and reverse osmosis membrane filtration.

They are distinguished by the size or molecular weight of the small particles that can be retained by the coating.

When the rated pore size range of the membrane is used as the distinguishing standard, the rated pore size range of the microporous membrane (MF) is. Ultrafiltration membrane (UF) is: Reverse osmosis membrane (RO) is.

It can be seen that ultrafiltration membranes are suitable for the separation and concentration of solutes in solutions, or the separation of colloidal suspensions that are difficult to complete with other separation technologies.

The membrane making technology of ultrafiltration membranes, i.e., the technology to obtain the expected size and narrow distribution of micropores, is important. There are many control factors of pores, such as ultrafiltration membranes with different pore sizes and pore size distributions can be obtained according to the type and concentration of the solution, evaporation and coagulation conditions during film making.

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

Ultrafiltration membranes are widely used in industry and have become one of the new chemical unit operations. used in the separation, concentration and purification of biological products, pharmaceutical products and food industry; It is also used in terminal treatment units in blood treatment, wastewater treatment and ultrapure water preparation. In China, ultrafiltration membranes have been successfully used to concentrate and purify Chinese herbal medicines.

With the advancement of technology, the screening function of ultrafiltration membrane will be improved and strengthened, and its contribution to human society will be greater and greater.

1. Good hydrophilicity.

Based on the analysis of Yingge water purifiers on the market, the ultrafiltration membrane has been specially hydrophilic, and the membrane filament has long-term hydrophilic properties, and the hydrolysis antennae has been reduced from 79-90 degrees before modification to 30-35 degrees. At a lower transmembrane pressure, high water flux can be obtained, and at the same time, the fouling resistance of the membrane filament can be improved.

2. High filtration precision.

Inge hollow fiber ultrafiltration membranes have uniform, micropores smaller than microns that remove microorganisms, colloids, diatoms, and other substances that cause turbidity.

3. Good mechanical strength.

The mechanical strength of the ultrafiltration membrane reflects the ability of the membrane filament to resist filament, which makes the ultrafiltration membrane lose its separation performance, which is an important index to evaluate the performance of the ultrafiltration membrane.

4. Long life and strong anti-fouling ability.

The company uses high-quality PVDF as raw material, so that the ultrafiltration hollow fiber membrane has good chemical corrosion resistance, oxidation resistance and light aging resistance. As a result, various methods can be used to wash repeatedly to remove contaminants and restore throughput.

5. Stable product performance.

Start with the raw materials, preparation process and product testing. Ensure the stable quality of raw materials, consistent and accurate control in the preparation process and 100% testing of products to ensure the stable performance of products.

Judging the quality of ultrafiltration membrane, we can look at it from the following aspects:1membrane materials; 2.film-making process; 3.membrane stacker structure; 4.Company strength.

Features of Toray brand ultrafiltration membrane:

1. Small pore size: microporous membrane of microns or smaller.

2. There are about 6 billion microns of microns per meter of ultrafiltration membrane wall, and the pore size only allows water molecules, beneficial minerals and trace elements to enter the water. Currently, only ultrafiltration membranes can filter the smallest bacteria (microns).

3. Ultrafiltration membrane fiber has good fluffiness and warmth, soft hand feel, good weather resistance, anti-mildew and anti-moth functions.

4. The effective area of the ultrafiltration membrane is very large, which makes the filtration of pure water flux as high as 1800 liters, which has an advantage compared with other brand specifications.

5. The bonding between the shell and the threaded sleeve is bonded with French imported glue, the bonding length is lengthened, and the joint gap is uniform. In the process of use, water leakage, degumming and other situations are avoided to meet the sanitary standards.

Zhejiang Jiefu environmental protection, you can learn about professional ultrafiltration membranes.

Ultrafiltration membrane technology:

Ultrafiltration membrane technology is a kind of semi-permeable membrane powered by pressure difference, which can be divided into three categories: ultrafiltration membrane filtration, microporous membrane filtration and reverse osmosis membrane filtration. This is distinguished according to the size of the impurities or molecular weight that can be retained by the ultrafiltration membrane, and if it is the pore size of the membrane, the rated pore size range of the microporous membrane (MF) is; Ultrafiltration membrane (UF) is: Reverse osmosis membranes are. It can be seen that ultrafiltration membranes are suitable for the separation and concentration of solutes in solutions, or the separation of colloidal suspensions that are difficult to complete with other separation techniques.

1.The ultrafiltration membrane has high chemical stability, high temperature resistance, acid resistance, and alkali resistance, so it has low requirements for influent water quality and strong versatility;

2.The ultrafiltration membrane technology has a simple principle, easy to realize automatic operation, save labor, and is easy to operate, easy to maintain, safe and stable operation;

3.Ultrafiltration membrane technology is a physical method, which does not need to add any chemicals in the water treatment process, so it can effectively prevent secondary pollution of the water body;

4.Ultrafiltration membrane technology has high efficiency and large water treatment, especially in the treatment of drinking water in less polluted cities, showing high application efficiency.

Ultrafiltration membrane technology is a new type of water treatment technology, compared with traditional water treatment technology, ultrafiltration membrane technology has the advantages of high efficiency, low energy consumption, large amount of water treatment and other advantages in the process of water treatment is very effective, with the development of technology is becoming more and more mature, ultrafiltration membrane technology has not only been widely used in industrial sewage treatment, but also reflects a broad application prospect in the field of urban drinking water purification.

Ultrafiltration membrane is the most mature and advanced technology in ultrafiltration technology. Hollow fiber outer diameter: , inner diameter:

The walls of hollow fiber tubes are covered with micropores, and the pore size is expressed in molecular weights that can intercept substances, which can reach thousands to hundreds of thousands. The raw water flows under pressure on the outside of the hollow fiber or in the inner cavity, which constitutes the external pressure type and the internal pressure type respectively. Ultrafiltration is a dynamic filtration process, and the trapped substances can be eliminated with the concentration of small amounts, which will not clog the membrane surface and can be operated continuously for a long time.

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

Ultrafiltration technology is a high-tech technology widely used in the field of water purification, solution separation, concentration, and extraction of useful substances from wastewater, wastewater purification and reuse. It is characterized by simple use process, no heating, energy saving, low-pressure operation, and small footprint of the device.