What Is Membrane Technology?

Membrane is a material with selective separation function. The process of separating, purifying, and concentrating different components of a feed liquid using selective membrane separation is called membrane separation. It differs from traditional filtration in that the membrane can be separated within the molecular range, and this process is a physical process without the need for phase changes and addition of additives. The pore size of the membrane is generally in the order of micrometers. According to the difference in pore size (or called molecular weight cut-off), the membrane can be divided into microfiltration membrane, ultrafiltration membrane, nanofiltration membrane and reverse osmosis membrane. It can be divided into inorganic according to the different materials Membrane and organic membrane, inorganic membrane is mainly only microfiltration grade membrane, mainly ceramic membrane and metal membrane. Organic membranes are made of high-molecular materials, such as cellulose acetate, aromatic polyamide, polyethersulfone, polyfluoropolymer, and so on.

Membrane Technology

(Scientific term)

At the same time, membrane technology has increasingly shown its important role and bright future in daily life. Membrane technology has been widely used as a new separation technology in gas separation,

Under the influence of a certain driving force, the specific permeability of a certain diaphragm is used to make

Depending on the driving force,

After more than 50 years of development, China's membrane industry has entered a rapid growth period.

Membrane is a type with special selectivity

According to material source: natural film and synthetic film, synthetic film is divided into organic film and inorganic film.

There are seven categories by structure:

a.

New national standards for drinking water

With the continuous development of membrane technology, membrane technology has been widely used in many aspects:

Membrane technology space form

In recent years, with the deepening of the concept of architectural space and the continuous improvement of scientific methods, "return to nature" and "the warmth of bathing nature" have become the mainstream of the development of modern architectural environment. The indoor and outdoor vision is increasingly blurred, and there are many uncertain spaces that penetrate inside and outside, such as: hall decoration, patio, four season hall, zoo and botanical garden, park square, observation deck, stage, stadium, sports stand , Cultural and entertainment venues, etc. Due to the light permeability of the film material, sunlight can pass through the film material to form slow light during the day, so that the space covered by the film achieves almost the same natural effect as outdoor. Therefore, the film structure can create a space form comparable to the natural environment.

Membrane technology logo sketch

The central area of a city reflects the geographical features and national customs of a city, and at the same time, it is also a sign of the degree of urban cultural development. And landscape design requires it to be widely readable, elegant and popular, not only has extraordinary artistic value, but also can make the public love to see and be closely connected with the public. The membrane structure is applied to urban sketch design with its light and elegant shape, soft and powerful curves, and the distinctive personality and identity of large spans and large spaces.

Membrane technology green walkway

In recent years, in densely populated cities, green spaces have been deployed around residential areas and there are pedestrian walkways. Residents can walk and relax in the heart of the city near the residential area without being affected by vehicles, and feel very comfortable. Constructing a film sketch or corridor, pavilion, waterside shelter, and parasols in the green space not only vividly beautifies the environment (like the little white sails in a vast oasis), but also has a strong functionality (people can take a walk Take a nap) and increase the sense of ambiguity in the space.

Membrane Technology Commercial Street

Commercial streets occupy a considerable proportion in the city. The architecture and environment of the commercial street are windows of urban civilization, representing the level of material civilization and spiritual civilization, and also an important part of the landscape environment. The membrane structure is light and chic with a very modern style, and has a variety of expression forms, which is easy to install and move, and is widely used in the design of commercial streets.

Membrane technology building entrance

The building entrance makes the interface between the urban public space and the building space an integral part of the urban space. It is the first part of people's visual contact. Therefore, in addition to its functions, it should also have a strong identity and reflect the personality of the building. It is an important part of the built environment and urban landscape. Because the natural curvilinear beauty of the membrane structure is unmatched by other structural types, it has become a form often used in building entrances and roofs recently.

Membrane Technology Walking Street

The use of lightweight and unique membrane structures to construct various semi-enclosed and fully enclosed imperfect spaces makes it an all-weather building space, provides artificial environments such as weather protection and sun protection, and has a good advertising sign effect. Great choice for pedestrian street renovation and new construction.

Membrane technology parking lot

With the acceleration of urban modernization, cars have become an indispensable means of transportation in any city. Due to the rapid development of the automobile industry in China, the number of cars owned by cities has increased exponentially, but urban construction plans have not been able to adapt to this development requirement as quickly as possible, and often there is no place for parking. Therefore, the issue of parking lots should be fully considered in the planning of construction groups, and the construction and planning of parking lots as an important part of modern urban construction planning has become increasingly important. Similarly, the membrane structure also plays an important role in the construction of the parking lot with its beautiful shape and practical function.

Membrane Technology High Speed Toll Station

Highway toll stations

At the entrance of the city, designing the architectural form with its own distinctive characteristics and cultural charm is the first choice for the development of each city, and the stretch film has its own changing characteristics, soft shapes, and illumination with colored lights at night. The unique and soft atmosphere shown in the past makes the past more memorable, and at the same time, the modern stretch film shows the development concept and ideas of a city.

Application areas of membrane technology

Electricity

Electronic

3. Chemical medicine;

4. Light industry;

5. Biological;

6. Food and beverage;

7. Municipal administration;

8. Environmental protection and other industries.

It has a wide range of applications and great industrial relevance.

Application of membrane technology

Comparison of separation range of PF ultrafiltration membrane and microfiltration membrane

In the field of water treatment, ultrafiltration technology can remove bacteria, viruses, heat sources and other colloidal substances in water, so it is used to prepare ultrapure water for the electronics industry, injections in the pharmaceutical industry, purification of various industrial water, and drinking water. Purification. In the food industry, ultrafiltration technology is gradually adopted in the production of dairy products, juices, wines, condiments, such as the separation of protein and low-molecular-weight lactose from water in milk or whey, clarification and sterilization of fruit juices, and coloration in wine Removal of protein, polysaccharides and other colloidal impurities, etc., the removal of bacteria in soy sauce and vinegar, compared with traditional methods, it shows the advantages of economy, reliability, and quality assurance.

In the production of medicine and biochemical industry, it is often necessary to separate and purify heat-sensitive substances. Ultrafiltration technology shows its outstanding advantages. Ultrafiltration to separate and concentrate biologically active substances (such as enzymes, viruses, nucleic acids, special proteins, etc.) is quite suitable for extracting drugs from animals and plants (such as alkaloids, hormones, etc.), and the extracts often contain large molecules or In many cases, solid materials can be separated by ultrafiltration to improve product quality.

In the field of wastewater treatment, ultrafiltration technology is one of the successful examples for the treatment of leaching water in the electroplating process. In the production process of metal products such as automobiles and furniture, after the coating is deposited on the metal surface by electrophoresis, the electroplating solution adsorbed on the product must be washed away with water. The washing wastewater containing 1 to 2% of the paint is washed, and the clean water is separated by an ultrafiltration device. After the paint is concentrated, it can be reused for electrocoating, and the obtained clean water can also be directly used for washing, which can realize water recycling. At present, most automobile factories at home and abroad use this method to treat electrocoat shower water.

Ultrafiltration technology can also be used for wastewater treatment in textile mills. The desizing solution of the textile factory contains polyvinyl alcohol (PVA). The PVA is recovered by an ultrafiltration device, and the water is recycled. The concentrated PVA concentrated solution can be resized and used.

With the development of new membrane materials (functional polymers, inorganic materials), the temperature, pressure and solvent resistance of membranes have been greatly improved. Ultrafiltration technology will be more widely used in petrochemical, chemical industry and more fields. widely.

Application of microfiltration

Microfiltration is mainly used to remove ultra-fine particles larger than about 0.05 m in solution. It has a wide range of applications and occupies the first place in the current membrane process industry sales.

In the water refining process, microfiltration technology can remove bacteria and solid impurities and can be used in the production of water for medicine and beverages. In the preparation of ultrapure water in the electronics industry, microfiltration can be used for pretreatment of ultrafiltration and reverse osmosis processes and terminal security filtration of products. Microfiltration technology can also be used for the filtration of various alcohols such as beer and rice wine to remove yeast, mold and other microorganisms, clarify the product, and extend the storage period. Microfiltration technology is also widely used in the fields of drug sterilization and biological detection.