Water Journal : Water Journal September 2014
water business water SEPTEMBER 2014 92 water Business NOV MONO COMPLETES PROJECT TO ENSURE QUALITY LEVELS FOR WELSH WATER NOV Mono has delivered a turnkey project to provide an extra level of protection for a major water and waste treatment plant in Pembrokeshire, Wales. The project centers on an EZstripTM progressing cavity pump, which is now being used on sewage transfer duties to ensure that the plant can guarantee the quality of the treated sewage under any flow conditions. Powered by a 4kW motor and operating at a duty speed of 226 rpm, the EZstripTM pump draws sewage from the centre of the final settlement tank at Dwr Cymru’s Crymych treatment plant. It pumps the sewage back up to the head of the treatment system, from where it returns back through the filter bed to the final tank. This ensures that the plant’s biological filters do not dry out and remain effective, even in low flow conditions. This in turn helps to maintain the quality of the final sewage within the required boundaries, at all times. Mono was approached because of its ability to provide a full turnkey package, which covered all the stages, from initial site survey, design and manufacture, through to full mechanical and electrical installation. Working closely with the project’s civil contractor, Mono installed the pump, suction pipe, rising main, control panel, overpressure and high temperature devices and completed the final testing and commissioning. Both the electrical and mechanical work were handled by Mono, which has since completed a similar project at Dwr Cymru’s Lamphey treatment plant. The progressing cavity pump at the centre of the Crymych project features Mono’s revolutionary EZstripTM design, which allows it to be maintained in-place. This provides a quick and easy way to disassemble, de-rag and maintain the pump without the need to disconnect suction and discharge pipework. This reduces a typical day-long maintenance operation down to just 30 minutes. Available in cast iron or stainless steel, and with a choice of rotor and stator materials, the pump requires only basic tools to maintain, and can be retrofitted into existing installations where a Mono Compact C pump has been used previously. For more details on the EZstripTM pump please visit www.mono-pumps.com. NEW ECONOMY-COST FLOTATION LEVEL TRANSMITTER FOR FLOTATION CELLS FloLevel Technologies, an innovator of level measurement products, has launched a new self-cleaning Flotation Level Transmitter (FLT) that offers a simple, low-maintenance device for difficult environments, like flotation cells. The FLT will increase operational efficiency of the flotation cell because the acoustic technology is not affected by density, build-up, scaling, hydraulic imbalance affects, conductivity or sticky froth conditions. The FLT FloLevelTM Array will provide a reliable and repeatable pulp/ slurry level (froth depth) with constant high resolution because the acoustic technology is not affected by the ore slurry (guange) characteristic changes. “We have focused on developing a simpler, low-maintenance replacement of level technologies like displacement floats, pressure transmitters, conductivity probes, that are known to be affected by NOV Mono has delivered a turnkey project at Dwr Cymru’s Crymych treatment plant in Pembrokeshire, Wales, with the EZstripTM pump.
Water Journal November 2014
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