辅助膜设备
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.
膜过滤的工作原理
物理分离
膜过滤是一种物理分离过程，其驱动力是特殊膜两侧的压力差。这一过程的特点是能够分离不同大小和特性的分子。
几乎所有的工业膜过滤都是以错流过滤的方式进行的，即被过滤的液体在压力作用下以高速平行于膜流动。
物理屏障
最基本的膜过滤是将单一的进料流通过膜系统，将其分离成两股独立的流，即渗透液和回流液。将它们分开的膜是一种具有高度专业特性的物理屏障--一种只有进料流中某些特定成分才能通过的屏障。
通过
这种膜材料的孔隙非常小，以埃（10-10 米）为单位，需要施加压力才能迫使液体通过。事实上，用于纳滤和反渗透的膜的孔隙非常小，即使用扫描电子显微镜也无法看到。
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.