Membrane separation technology and application introduction
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- Time of issue:2018-11-05 19:21
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Membrane separation technology and application introduction
(Summary description)Membrane is a material with selective separation function. The process of using the selective separation of the membrane to realize the separation, purification and concentration of different components of the feed liquid is called membrane separation. It is different from traditional filtration in that the membrane can be separated in the molecular range, and this process is a physical process that does not require phase changes and additives. The pore size of the membrane is generally micron. According to the difference of its pore size (or called the molecular weight cut-off), the membrane can be divided into microfiltration membrane, ultrafiltration membrane, sodium filtration membrane and reverse osmosis membrane. According to the different materials, it can be divided into Inorganic membranes and organic membranes, inorganic membranes are mainly microfiltration membranes, mainly ceramic membranes and metal membranes.
- Categories:Industry News
- Author:
- Origin:
- Time of issue:2018-11-05 19:21
- Views:84
Membrane is a material with selective separation function. The process of using the selective separation of the membrane to realize the separation, purification and concentration of different components of the feed liquid is called membrane separation. It is different from traditional filtration in that the membrane can be separated in the molecular range, and this process is a physical process that does not require phase changes and additives. The pore size of the membrane is generally micron. According to the difference of its pore size (or called the molecular weight cut-off), the membrane can be divided into microfiltration membrane, ultrafiltration membrane, sodium filtration membrane and reverse osmosis membrane. According to the different materials, it can be divided into Inorganic membranes and organic membranes, inorganic membranes are mainly microfiltration membranes, mainly ceramic membranes and metal membranes. Organic membranes are made of polymer materials, such as cellulose acetate. Aromatic polyamide, polyethersulfone, polyfluoropolymer, etc. Membrane separation process: Membrane is the core part of each membrane process. It can be seen as a barrier with permeation selectivity between the two phases, or as the interface between the two phases. The membrane separation process can be illustrated by the following figure. Phase 1 is the feedstock or upstream side, and phase 2 is the permeate or downstream side. A certain component in the raw material mixture can pass through the membrane to the downstream side faster than other components, thereby achieving separation. Membrane separation advantages: There is very little loss of active ingredients at room temperature, and it is especially suitable for the separation and concentration of heat-sensitive substances, such as antibiotics and other medicines, fruit juices, enzymes, and proteins. There is no phase change, the original flavor is maintained, the energy consumption is extremely low, and the cost is about evaporative concentration or freeze concentration. No chemical change: typical physical separation process, no chemical reagents and additives are used, and the product is not contaminated. Good selectivity, material separation can be carried out at the molecular level, with excellent performance that cannot be replaced by common filter media. The adaptability is strong, the processing scale can be large or small, can be continuous or intermittently, the process is simple, the operation is convenient, and the automation is easy. Application and development of membrane separation technology: As a high separation, concentration, purification and purification technology, membrane separation technology is a rapidly developing high-tech in the past 30 years. The use of membrane technology has convenient operation, compact equipment, safe working environment, and energy saving And chemical reagents and other advantages. It has been widely used in water treatment, electronics, food, environment, metallurgy, medicine, biology, energy, petroleum, bionics and other fields and scientific research and has shown its strong vitality. Membrane technology started from electrodialysis and reverse osmosis. Various membrane processes and membrane technologies such as ultrafiltration, microfiltration, sodium filtration, dialysis, gas separation, pervaporation, and liquid membrane have been in a stage of rapid development. Due to the development of membrane technology, traditional separation technology has made new breakthroughs. There have been many new membrane separation processes and membrane technology applications such as membrane distillation, membrane extraction, membrane absorption, membrane chromatography, membrane affinity, membrane reactor and membrane controlled release. The application of these new technologies will produce huge economic and social benefits
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