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诺森伯兰(Northumbrian)中国业务专业从事水处理的技术研发,制造,调试服务于一体的水环境的大型国际高新技术企业,是目前国际水处理工业系统实力最强的企业之一;诺森伯兰为全世界提供最好的家用饮水设备及商用纯水设备,超纯水设备
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RO膜过滤原理解剖
作者:诺森伯兰    发布于:2009-12-10 13:59:03    文字:【】【】【

RO Reverse Osmosis membrane is the English acronym, the Chinese meaning is reverse osmosis. Usually water flow pattern from low concentration flow to the high concentration, once water pressure, will flow to the low concentration of high concentration, that is the so-called reverse osmosis principle: RO membrane pore size is due to the hair of five millionths (0.0001 m), the general naked eye can not see, bacteria, viruses is it 5000 times, so that only the water molecules and some beneficial to human body mineral ions can pass through other impurities and heavy metals discharged by the waste pipe. All the desalination process, as well as waste water recycling astronauts are using this method, therefore, also known as high-tech RO membrane in vitro "artificial kidney." At home and abroad, the medical military civilian areas, have taken the top RO membrane filtration polymer.
We must first understand the "infiltration" concept. Penetration is a physical phenomenon. When the two different salts containing water, such as with a semipermeable

 
Of the film you will find separate, while a small amount of salt water would seep through the membrane to the high salt content of the water, but did not penetrate the salt contained, so that both sides of the salt concentration gradually integrated into equal So far, a process known as osmosis. However, to accomplish this process takes a long time. But if the high salt content of the water side, a pressure is applied, the results can also be said infiltration is stopped, then the pressure is called osmotic pressure. If the pressure is increased again, it can make a direction opposite to the direction of penetration, and the remaining salt. Therefore, the principle of reverse osmosis desalination, is in the salty water (such as raw water), to impose more than the natural osmotic pressure of the pressure, the permeate in the opposite direction, the water molecules in the raw water pressure to the other side of the membrane, become clean water, so as to achieve the purpose of removing impurities in the water, salinity.

RO是英文Reverse Osmosis membrane的缩写,中文意思是反渗透。一般水的流动方式是由低浓度流向高浓度,水一旦加压之后,将由高浓度流向低浓度,亦即所谓逆渗透原理:由于RO膜的孔径是头发丝的一百万分之五(0.0001微米),一般肉眼无法看到,细菌、病毒是它的5000倍,因此,只有水分子及部分有益人体的矿物离子能够通过,其它杂质及重金属均由废水管排出。所有海水淡化的过程,以及太空人废水回收处理均采用此方法,因此RO膜又称体外的高科技“人工肾脏”。目前国内外,医学军用民用领域,都采取顶级RO膜进行高分子过滤。
首先要了解“渗透”的概念。渗透是一种物理现象。当两种含有不同盐类的水,如用一张半渗透

 
性的薄膜分开就会发现,含盐量少的一边的水分会透过膜渗到含盐量高的水中,而所含的盐分并不渗透,这样,逐渐把两边的含盐浓度融合到均等为止,这一过程称为渗透。然而,要完成这一过程需要很长时间。但如果在含盐量高的水侧,施加一个压力,其结果也可以使上述渗透停止,这时的压力称为渗透压力。如果压力再加大,可以使方向相反方向渗透,而盐分剩下。因此,反渗透除盐原理,就是在有盐分的水中(如原水),施以比自然渗透压力更大的压力,使渗透向相反方向进行,把原水中的水分子压力到膜的另一边,变成洁净的水,从而达到除去水中杂质、盐分的目的。

 

Two, HPAN ultrafiltration
UF, is consistent with a pore size, pore size in the range of 0.001 to 0.02 micron rated microporous filtration membranes. In applying appropriate pressure side of the membrane, it can be screened out solute molecules smaller than the pore size, to isolate molecular weight greater than 500 Daltons (atomic mass units), the particle size greater than 10 nanometers. UF is one of the earliest development of polymer membrane.
UF screening process to a pressure difference across the membrane as the driving force, with an ultrafiltration membrane filter media under a certain pressure, when the liquid flows through the membrane surface, many of the small ultra-microfiltration membrane surface clouds hole only allows water and small molecules passed into the permeate, while larger than the volume of liquid in the micro-pore size of the membrane surface material were trapped in the feed side of the membrane, to become concentrated liquid, thereby achieving the purification of the liquid, the separation and concentration The purpose of. Per meter length of wire ultrafiltration membrane wall about 6 billion 0.01 micron pores, pore size allows only water molecules, water

Beneficial minerals and trace elements through, while the smallest bacteria are 0.02 microns or more, so much larger than bacteria and bacterial volume of colloids, rust, suspended solids, silt, organic molecules and so be trapped ultrafiltration down, in order to achieve the purification process.

 

诺森伯兰

Two, HPAN ultrafiltration
UF, is consistent with a pore size, pore size in the range of 0.001 to 0.02 micron rated microporous filtration membranes. In applying appropriate pressure side of the membrane, it can be screened out solute molecules smaller than the pore size, to isolate molecular weight greater than 500 Daltons (atomic mass units), the particle size greater than 10 nanometers. UF is one of the earliest development of polymer membrane.
UF screening process to a pressure difference across the membrane as the driving force, with an ultrafiltration membrane filter media under a certain pressure, when the liquid flows through the membrane surface, many of the small ultra-microfiltration membrane surface clouds hole only allows water and small molecules passed into the permeate, while larger than the volume of liquid in the micro-pore size of the membrane surface material were trapped in the feed side of the membrane, to become concentrated liquid, thereby achieving the purification of the liquid, the separation and concentration The purpose of. Per meter length of wire ultrafiltration membrane wall about 6 billion 0.01 micron pores, pore size allows only water molecules, water

Beneficial minerals and trace elements through, while the smallest bacteria are 0.02 microns or more, so much larger than bacteria and bacterial volume of colloids, rust, suspended solids, silt, organic molecules and so be trapped ultrafiltration down, in order to achieve the purification process.

超滤膜,是一种孔径规格一致,额定孔径范围为0.001-0.02微米的微孔过滤膜。在膜的一侧施以适当压力,就能筛出小于孔径的溶质分子,以分离分子量大于500道尔顿(原子质量单位)、粒径大于10纳米的颗粒。超滤膜是最早开发的高分子分离膜之一。
超滤膜筛分过程,以膜两侧的压力差为驱动力,以超滤膜为过滤介质,在一定的压力下,当原液流过膜表面时,超滤膜表面密布的许多细小的微孔只允许水及小分子物质通过而成为透过液,而原液中体积大于膜表面微孔径的物质则被截留在膜的进液侧,成为浓缩液,因而实现对原液的净化、分离和浓缩的目的。每米长的超滤膜丝管壁上约有60亿个0.01微米的微孔,其孔径只允许水分子、水中的
有益矿物质和微量元素通过,而最小细菌的体积都在0.02微米以上,因此细菌以及比细菌体积大得多的胶体、铁锈、悬浮物、泥沙、大分子有机物等都能被超滤膜截留下来,从而实现了净化过程。
 

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