輔助膜設(shè)備
Alfa Laval provides everything you need for a complete membrane filtration system. We also offer a wide range of special ancillary equipment, fittings and accessories needed for installing the membranes used in spiral-wound and plate-and-frame systems, and for operating them safely and efficiently
The gentle alternative
Alfa Laval is one of the world's major suppliers of industrial separation technologies. We have a proud tradition of providing virtually all industries with separation equipment based on centrifugal and mechanical principles. However, there are may processes in which the substances involved are too delicate to be able to withstand such treatment. And for those processes we take price in offering a gentle alternative viz. cross-flow membrane filtration.
Alfa Laval is the world's leading supplier of crossflow membrane filters and equipment for sanitary use. High-hygiene Alfa Laval membrane products are the preferrred choice for many leading users of membrane filtration technology, as well as for OEM suppliers of membrane filtration modules and systems.
Getting the performance right
The efficiency of Alfa Laval's membrane filtration systems depends heavily on the reliable, uninterrupted application of auxiliary equipment, specially designed for supporting and optimizing the plant output.
Alfa Laval is unique in being able to also provide our customers with a comprehensive range of auxiliary membrane equipment, such as tailormade membrane housings, installation devices, heat exchangers, control instruments, tank equipment and valves. All our auxiliary membrane equipment is approved for pressure classifications up to 60 bar to resist membrane filtration processes requiring high operating temperatures.
Alfa Laval also offers a wide selection of high-pressure pumps of sanitary standard with carefully selected flow characteristics to control the flow across the membranes.
Benefits
- wide range of special ancillary equipment, fittings and accessories
- full spectrum available from one single expert source
- short delivery times and efficient logistics
- all components dovetailing perfectly
- all materials in compliance with FDA regulations and suitable for food and pharmaceutical applications
One expert source
By choosing Alfa Laval as your preferred supplier of membrane filtration systems and auxiliary membrane equipment you benefit from efficient logistics, from all the components dovetailing perfectly, and the advantages of purchasing the full spectrum of sanitary equipment and fittings from one single expert source.
膜過(guò)濾的工作原理
物理分離
膜過(guò)濾是一種物理分離過(guò)程，其驅(qū)動(dòng)力是特殊膜兩側(cè)的壓力差。這一過(guò)程的特點(diǎn)是能夠分離不同大小和特性的分子。
幾乎所有的工業(yè)膜過(guò)濾都是以錯(cuò)流過(guò)濾的方式進(jìn)行的，即被過(guò)濾的液體在壓力作用下以高速平行于膜流動(dòng)。
物理屏障
最基本的膜過(guò)濾是將單一的進(jìn)料流通過(guò)膜系統(tǒng)，將其分離成兩股獨(dú)立的流，即滲透液和回流液。將它們分開(kāi)的膜是一種具有高度專(zhuān)業(yè)特性的物理屏障--一種只有進(jìn)料流中某些特定成分才能通過(guò)的屏障。
通過(guò)
這種膜材料的孔隙非常小，以埃（10-10 米）為單位，需要施加壓力才能迫使液體通過(guò)。事實(shí)上，用于納濾和反滲透的膜的孔隙非常小，即使用掃描電子顯微鏡也無(wú)法看到。
Compliances
All materials used for the production of Alfa Laval membranes, in both spiral-wound and flat-sheet membrane designs and configurations, comply with EU Regulation (EC) 1935/2004, EU Regulation 10/2011, EU Regulation (EC) 2023/2006 and FDA regulations (CFR) Title 21. The membranes are thus suitable for use within food and pharmaceutical processing applications.
These compliance also extend to the equipment and fittings related to membrane operations, including items such as plate-and-frame units, element housings and pumps.