The NEW 8 x 20-inch Liqui-Cel® Membrane Contactor Makes O2 and CO2 Removal from Liquids Even More Economical—See it at Aquatech ChinaRelease Date: May 09, 2011
Charlotte, NC. USA.May 9, 2011. — Membrana is pleased to introduce a New 8 x 20 Liqui-Cel® Membrane Contactor to its product family. It will be launched at the 2011 Aquatech China Show from June 1-3, 2011 in Shanghai, China.
This integrally potted Membrane Contactor is designed for industrial applications that do not require the level of regulatory compliance that is standard in many other Liqui-Cel high purity products. The 8 x 20 Membrane Contactor utilizes an industrial polypropylene hollow fiber and durable PVC housing which provide an economical cost base for this new product making it ideal for degassing water in countries that have a need for affordable industrial water treatment products.
R&D resources were focused on designing a contactor that would specifically meet the needs of industrial applications. This module contains 596 ft2 (55 m2) of membrane area and it is perfect for many boiler feed water and corrosion control applications around the world. An individual 8 x 20 Membrane Contactor can process up to 11.4 m3/hr (50 gpm) in one device. Larger flows can be handled by piping multiple contactors in parallel and system modeling will be completed in the GasCADTM sizing program. The pressure rating on the 8 x 20 Membrane Contactor is 4.1 bar (60 psig) making it perfect for the industrial applications it was designed for.
Membrane Contactors offer a modular option for many applications and they can be put in virtually any area of a building. They are rapidly displacing forced draft deaerators and vacuum towers in new systems as well as many older ones.
These devices offer an excellent solution for removing carbon dioxide prior to mixed bed or EDI technology to eliminate or reduce chemical usage and improve water quality exiting these technologies. They are also used in Boiler Feed water applications for simultaneous oxygen and CO2 removal to protect the boiler and piping from corrosion. In the Boiler application they also have lower operating costs because blow down frequency is reduced and less energy is required for the contactor system’s operation.
The changes made to materials, product design, and testing allow for more favorable economics of this device for many industrial applications. Membrane Contactors utilize thousands of Celgard® microporous polypropylene hollow fibers knitted into an array that is wound around a distribution tube with a central baffle. During operation, the liquid flows over the shellside (outside) of the hollow fibers. The patented Extra-Flow design incorporates a baffle in the middle of the contactor, which directs the liquid radially across the array. A strip gas or vacuum, either separately or in combination, is applied on the lumenside (inside) of the hollow fibers.
Because of its hydrophobic nature, the membrane acts as an inert support to allow direct contact between a gas and liquid phase without dispersion. The dissolved gas in the liquid travels through the pore by applying a higher pressure to the liquid stream relative to the gas stream.
Liqui-Cel®, MicroModule®, MiniModule®, and SuperPhobic® Membrane Contactors are used around the world for adding or removing oxygen (O2), carbon dioxide (CO2) and nitrogen (N2) to or from different liquids in digital printing, analytical/biotechnology, semiconductor, power, pharmaceutical, food and beverage, and many other industries. For example, O2 negatively impacts many processes; it is corrosive and can oxidize materials. In the power and industrial areas, piping and equipment are susceptible to corrosion. Specifically to the semiconductor and ink market, high levels of dissolved gases can cause lower yields and slower process speeds.
Liqui-Cel® Contactors are also used to add gasses to liquids to enhance megasonic cleaning. The beverage industry looks to membrane contactors for carbonation, nitrogenation and deoxygenation. These reflect only a few examples of the variety of applications where Membrana Membrane Contactors are used. Membrana’s Filtration Group also manufactures a variety of membranes and devices used for filtration in various industries and applications.
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