Water. Desalination + reuse
Issue link: https://fhpublishing.uberflip.com/i/133796
SHOWCASE HIGH-PRESSURE RO PUMPS INTRODUCED BY DANFOSS Danfoss has announced the latest additions to its range of high-pressure pumps for reverse osmosis (RO) systems, the APP S 674 series. With their small footprints and low-maintenance costs, the new pumps were engineered for offshore rigs, where space, weight and reliability are key criteria. But the pumps are also well suited for any application where energy efficiency and The APP S 674 pump series. worry-free operations matter. The three new pumps have flow rates from 0.8 m3/h (3.5 gpm) and all the way up to 38.4 m3/h (169 gpm). According to Jesper Bentzen, sales director at Danfoss, the APP S 674 range is ideal for RO systems where produced water is used in a variety of oil and gas applications, including fresh water for drinking and technical water for NOx reduction in gas turbines or injection into wells. "The offshore industry told us what they wanted, and we listened," says Bentzen. "The APP S 674 pumps are compact and efficient, and their simple maintenance schedules let operators concentrate on their business, not ours. Everything is crafted in Super Duplex stainless steel, and both the materials and the foundries are NORSOK approved so we can provide full traceability for all pressure-critical parts. The pumps are engineered and certified according to API, and we can also deliver with ATEX if required." Like all other APP pumps from Danfoss, the new APP S 674 range is exceptionally energy efficient, operating at up to 97% volumetric efficiency. The axial piston design results in constant flow regardless of pressure variations, as well as fewer moving parts for improved reliability and reduced maintenance costs. Belt drivers and pulsation dampers are both things of the past with the APP series, and no oil lubrication is needed as the pumped medium itself lubricates moving parts. MPPE TO STRIP HYDROCARBONS FROM LNG WATER Macro porous polymer extraction (MPPE) is to be employed to reuse water contaminated with hydrocarbons on the world's largest offshore floating facility 475 km northeast of Broome, Western Australia. VWS MPP Systems, a subsidiary of Veolia Water Solutions & Technologies, is to use the system under a contract awarded by the Technip Samsung consortium for Shell's Prelude liquefied natural gas facility. Jan Bart Kok of Netherlands-based VWS MPP Systems told D&WR that MPPE, which can also be used for hydrocarboncontaminated groundwater, utilises two proven technologies, liquid-liquid extraction and steam stripping with an innovative medium (the MPPE particles). Hydrocarbon contaminated water is passed through a column packed with MPPE particles. An extraction liquid immobilised within the polymer matrix removes the hydrocarbons from the water. The purified water passes out of the column directly for reuse or discharge. All hydrocarbons with a relatively high affinity for the extraction liquid (compared to water) are removed. Periodical in-situ regeneration of the extraction liquid containing MPPE particles is accomplished with low-pressure steam. The steam volatises the hydrocarbons. Volatised hydrocarbons are condensed and then separated by gravity. The hydrocarbon phase is recovered and sold as product, the water phase is recycled to the system. Removal rates of 99.99% or more can be achieved. MPPE does not require chemicals, does not produce a waste or off-gas. WATER QUALITY TEST PEN DEMONSTRATED ON YOUTUBE US monitoring equipment company Myron L has posted a video on the internet illustrating the working of its Ultrapen PT1 water quality tester package. The pen can measure conductivity for potassium chloride in µS; total dissolved solids (TDS) for natural water in ppm; TDS for sodium chloride solutions in ppm; salinity for natural water solutions in ppt; and salinity for sodium chloride solutions in ppt. The video can be seen on: www.youtube.com/ watch?v=KNFqCehYjbQ MANTEC FILTRATION REBRANDING COMPLETED UK-based Mantec, which makes ceramic filters and microfiltration membranes, has finished the rollout of its company name to all its products previously marketed under the old company name of Fairey Filtration. Mantec's aeration/diffusion tubes were recently specified for a major municipal water plant by Envicon, a German company based in Dinslaken, which took delivery of 4,480 750 mm long ceramic tubes. Mantec produces Pyrolith and Coralith dead-end filtration tubes, Star-Sep membranes and Puremet filters. The Pyrolith, Coralith, Star-Sep and Puremet tradenames are carried forward and continue to be strongly recognised as market leaders and brands of excellence. "It was a logical move to bring Fairey Filtration fully into the Mantec family," commented Andy Frost, Mantec's Project Engineer. "Mantec is now a name synonymous with the smart development and exploitation of technical ceramics and the former Fairey Filtration range of products fits this description perfectly." For many demanding applications, these products regularly outperform competitive systems and alternative approaches. A variety of difficult problems have been overcome by using these proprietary porous ceramic media – superior materials that are chemically inert, safe, stable and which can also withstand in-process temperatures up to 900°C. Repeatable quality and a very high degree of reliability have also led to many orders from the UK's Ministry of Defence. The tubes supplied to Germany are among the longest generally manufactured by Mantec – internal diameters are routinely offered between 13 mm and 40 mm and outside diameters of between 29 mm and 70 mm. Pyrolith tubes have a chemical composition featuring 57% silica/36% alumina while the Coralith tubes are 10% silica/85% alumina. May-June 2013 | Desalination & Water Reuse | 39 |