Water. Desalination + reuse
Issue link: https://fhpublishing.uberflip.com/i/86284
PROJECTS Filter Forward Pump 720m3 SW Pump /h Seawater 720m3 Intake Sump /h ...to Train 200 CF HP Pump 65 bar 360m3 /h 108m3 /h ...to Train 100 Cartridge Filter NF Pumps 25 bar 360m3 65% Conversion NF Section 234m3 /h /h SWRO HP Pump 2nd HP Pump Stage 58% Conversation SWRO 136m3 Brine Outfall 64 bar 98m3 /h /h PILOT (NF-SWRO) CASE 2 Figure 1 – Schematic Flow Diagram of Umm Lujj SWRO Plant with Train 100 as the experimental NF-SWRO and Train 200 as the control/conventional SWRO and SWCC team members inventing a novel, revolutionary NF-Hybrid seawater desalination process. This has been developed to its current status, where it greatly outperforms the current methods used worldwide. The NF-Hybrid process can be conveniently implemented for all existing/ future projects of conventionally built 106 mgd P = 69 bar TDS = 33,500ppm P = 67bar Reject Figure 2 – SWRO design of Carlsbad seawater desalination plant NF Membranes Recovery = 85% 1st stage 106mgd 33,500ppm 60-70 bar 90mgd @23,450ppm NF Product 2nd stage 58.83mgd SWRO/Thermal desalination plants, including Carlsbad, by adding to an NF pretreatment stage, followed by its full integration with conventional SWRO/ Thermal desalination plant processes. Using this technique, a properly filtered Gravity Filter Filtered Water Sump Pressure Filter Clear Well for the following conventional seawater desalination process, increasing its water output yield. This NF-Hybrid process has been demonstrated on many SWRDI pilot plants (1997-2000), both membrane and thermal. 30% Conversion 1st Stage RO 30 bar 85% Conversation 2nd Stage RO 91.8m3 /h CONTROL (SWRO) CASE 1 the conversion of two commercial plants to this new NF-Hybrid process: l SWCC's commercial Umm Lujj SWRO plant, Saudi Arabia, 2000 The pilot plant trials were followed by l LET's Sharjah commercial thermal upgrading of MSF plant, UAE, 2004 of over 48% and 44%, respectively, were observed and documented. The Umm Lujj plant is illustrated in Figure 1. During the initial trial year in 2000, Train 100 received only two-thirds of NF permeate instead of the full normal design feed, which otherwise would have significantly increased the plant water yield. Commercial plants with similar Significant increases in plant water yields pretreated feed is fed first to an NF membrane pretreatment unit, and then the NF permeate product is made the feed Product 47.17mgd 1 bar configurations, ie, both SWRO and MSFD processes existing in the same facility, are present in a variety of locations in Saudi Arabia including Al-Jubail, Jeddah, Yomba and Shoaiba; similar models of MSFD and SWRO at the same plant exist also in Fujairah, UAE and many other GCC states. thermal processes at the same seawater desalination plants, or where both are made available side-by-side at the same location, allows a third application: the novel Tri NF-SWROreject The availability of both SWRO and Mode at the high temperature (TMT) of 120-130ºC, to yield even more distillate water from MSFD/MED operation of SWRO reject. -MSF/MED Hybrid NF Reject Turbocharger 35 + 10 bar SWRO Feed 90mgd 23,450ppm SWRO Membranes Recover = 70% 1st stage SWRO Product 15-25 bar 2nd stage 90 bar SWRO Reject Turbocharger 27mgd 78,167ppm 10.8mgd @ 195,417ppm Blow Down Figure 3 – Proposed Optimal Carlsbad Tri-hybrid NF-SWRO-Thermal Seawater Desalination Process * Correct TDS of NF permeates is 23,450 ppm, while correct TDS of SWRO reject is 88,775 ppm * Correct TDS of NF permeates is 23,450ppm, while correct TDS of SWRO reject is 88,775ppm | 18 | Desalination & Water Reuse | May-June 2012 MED Product 16.2mgd @ 50ppm Total Product 72.2mgd @ 169ppm 16mgd @221,937ppm Carlsbad SWRO plant by incorporating the recently introduced high TBT MED process, jointly created at SWRDI with Japanese researchers, for an optimized design to further increase the product yield in addition to the proposed NF- hybrid. This design is being proposed for the SWRO Product 63mgd @ 200ppm UPGRADING CARLSBAD TO A HYBRID DESIGN This proposal illustrates how upgrading to this superior NF-SWRO Hybrid – aided by the now-permitted MED use of the SWRO reject - easily outperforms the present conventional SWRO process design. The SWRO Carlsbad plant was designed as shown in Figure 2 to produce 50 MGD