Water Journal : Water Journal November 2015
WATER NOVEMBER 2015 86 Water Business RIVER PUMP GOES SUBMERSIBLE The Templeton family, sugar cane farmers on Queensland's Sunshine Coast, have cut energy costs and gained additional water ef ciency by installing a Tsurumi submersible dewatering pump. The new installation is a safer, ood-proof solution for water harvesting that delivers 3,000 lpm at 850 Kpa. The original system at the farm had an 18.5kW end suction centrifugal pump mounted on a trolley beside the creek. This supplied water to a variable-speed 75kW end suction pump positioned 18 metres above the creek water level, away from the highest known ood level. The combined pump system supplied water at a rate of 2,400 lpm, at 700KPA, to irrigate pasture, sugar cane and a valuable ginger crop on the Templetons' farm. In the event of heavy rain, a tractor was used to haul the old pump/trolley up a 40-metre railway track, away from the creek. Creek levels can rise fast, and this procedure had signi cant risks, especially when performed at night on a steep, wet, slippery bank. The Pump House, Nambour-based Aussie Pump distributor, came up with an "out-of-the- box" solution to the problem. A Tsurumi LH619 submersible dewatering pump, installed inside a 630mm PN10 poly pipe sleeve, now delivers water to the 75kW irrigation pump. The poly sleeve runs down the creek bank, secured by cables and chain anchors. "Dewatering pumps aren't usually used for applications like this, but these big high- head pumps are ideal for water harvesting from rivers or dams," said Peter Chadband from the Pump House. Four main features of the Tsurumi submersible make it suitable for this application: 1. The pump's resistance to abrasion means it can handle sand in the creek water in times of dry weather. 2. Its slimline design and the central discharge ange allow the pump to t easily inside a poly pipe sleeve. 3. The inbuilt thermal motor protection shutdown device protects the pump from dry running. 4. The robust construction and hard-wearing mechanical seal arrangements are designed for abrasive mining applications. The 6" pump selected, a Tsurumi LH619, has a 19kW three-phase motor with DOL start. The pump produces a maximum 4,370 litres per minute ow and has a vertical head of 42 metres. The pumps can be installed either in shallow wells or bores, but also lend themselves to being installed in shrouds or poly pipe sleeves. They can be mounted vertically or in a range of angles through to horizontal without affecting pump performance. Although originally designed for mine dewatering, the Tsurumi LH series is equally at home in agricultural water harvesting applications. The centre-mounted discharge means discharge pipes or hoses are balanced. The Tsurumi submersible pump is totally different in design and concept to normal submersible water harvesters or line shaft pumps. The closed style impellers are manufactured from high chrome iron and are durable and corrosion-resistant. The pump comes with a double silicon carbide mechanical seal, protected in an oil chamber. The oil chamber eliminates spring failure caused by corrosion or abrasion and keeps both surfaces of the mechanical seal lubricated and cool. A patented oil lifter developed by Tsurumi provides guide veins inside the oil chamber than ensures the mechanical seals are lubricated even if the oil levels fall. Standard on all Tsurumi pumps is an anti- wicking block at the cable entry. This feature prevents the incursion of water due to capillary wicking in the event that the power cable is damaged or the end submerged. "We've seen the 75kW pump deliver more ow while drawing 10% less current due to the increased ef ciency gained by a positive suction pressure at the pump inlet. It's a great outcome using less labour, less energy with increased performance and improved safety for the client," said Chadband. Like all Tsurumi pumps, the LH series is covered by a three-year warranty. For more information please go to: www.aussiepumps.com.au. PENTAIR LAUNCHES X-FLOW HELIX TECHNOLOGY AT WEFTEC At the WEFTEC (Water Environment Federation's Technical Exhibition and Conference) exhibition in September in Chicago, US, Pentair launched its patented ux-enhancing Helix technology, available on all X-Flow tubular membrane modules. Another novelty presented was the X-Flow Compact 75G, a membrane module developed for the most demanding water treatment applications. X-Flow is Pentair's international membrane brand, delivering membrane technology to OEMs, partners and contractors through a worldwide network. Pentair engineers proactively support clients with cutting-edge and cost-ef cient solutions that are built to cope with the most challenging conditions in water treatment. Ever since its inception, Pentair has actively pursued innovation through a continuous process of research and development, cooperation and interaction with customers around the world. The new X-Flow Helix technology is a great example of this, as it enables users of heavy-duty membrane technology to improve their operations and reduce operational costs. Helix provides the solution to the problem of membrane fouling in high- solids ultra ltration (UF). Inside the tubular membrane modules, the build-up of insoluble particles results in a cake layer at the membrane wall, which increases energy consumption and decreases overall performance. The common answer is to step up the cross ow speed and energy use, and accept the drop in ef ciency and productivity. Helix introduces continuous turbulence right at the membrane wall, effectively cleaning the membrane at low cross ow velocities. Depending on the feed water characteristics, Helix can deliver up to 100% extra productivity and lower energy consumption by 50%. The Compact 75G, also exhibited at WEFTEC, is the newest addition to the X-Flow Compact product range featuring the new Helix technology. Pentair developed the X-Flow Compact 75G, a glass bre-reinforced epoxy module with high mechanical strength and chemical resistance, for the most demanding applications, including large water treatment plants and produced water treatment in the oil and gas industry. For more information please go to: www.x- ow.com Installation of a Tsurumi high-head submersible to harvest river water led to increased ef cency and improved performance of the irrigation system on the Templeton's sugar cane farm.
Water Journal September 2015
Current Feb 2016