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PUMPS,VALVES & ACTUATORS


HOW TO SAVE MONEY IN LAS VEGAS


Las Vegas Valley Water District is on a mission to optimise its water distribution, and thanks to Riventa, has identified potential savings that equate to $254,000 a year


(WPS), a strategic part of the Las Vegas Valley Water District’s (LVVWD) network, which is also part of the Southern Nevada Water Authority (SNWA). Previously, it had not been possible to


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accurately assess the efficiency of the seven fixed-speed drywell pumps, which transfer potable water to a regulator tank at another site – but Riventa soon established that savings of 7.4% (equivalent to $154,000 per year) would result from refurbishing four of the pumps. Savings of at least 4.8% ($100,000 per year)


could also be achieved through pump scheduling at Hacienda WPS, which was built in 1981, with assets upgraded in 1996. Steve Barrett, Riventa’s managing director,


commented: “Hacienda WPS is very well- designed, with pumps perfectly suited to the


PRECISE CONTROL IN CARBON CAPTURE PROJECTS


As the importance of reducing carbon dioxide (CO2) emissions continues to increase, companies are developing new technologies that will enable this on an industrial scale. In the case of C-Capture, perfecting the carbon capture process requires precision control of a solvent, and the solution was delivered by Bürkert. Emissions of pollutants from industrial processes such as power


generation, cement production, steel and glass making, are subject to strict regulations and businesses have to invest in various technologies to ensure compliance. Currently, one of the challenges with reducing CO2 levels is the amount of energy required by many of


the leading processes. This is being challenged by C-Capture, which has developed technology that uses solvents to capture CO2 and process and store it, either permanently or for use in another process. The company designs chemical processes for capturing CO2. Using in-house test rigs, data is generated


which lay the foundations for industrial-scale solutions used to reduce greenhouse emissions. C-Capture needed to find the right technology for accurate measurements to generate data. To help with specifying the parts, C-Capture worked with Scattergood & Johnson. An in-house test rig


involves the flow of the solvent into a wetted wall column. It was important to precisely regulate the solvent flow to enable the collection of accurate test data. The process required an all-electric flow control device, since a pneumatically controlled valve would


only add further cost and complexity to the project. Scattergood recommended the Bürkert Type 3361 2- way globe control valve as the best solution due to its precise and fast flow control. The Type 3361 also offers a flexibility of design to meet the requirements of the application. With the


need for precise data paramount, the valve offers both analogue and digital outputs. Furthermore, the option of five interchangeable valve seats allows the Kv value to be optimised, while the ability to add a position controller or a process controller to the application makes it suitable for both centralised and de-centralised systems.


system, but using FREEFLOW, we were still able to identify significant hidden savings, which are typical for water treatment facilities across America with equipment such as pumps and blowers of a certain age.” Initial data findings showed that the least


efficient pump was used the most during the first 2 weeks of the project period. Using all data, Riventa made real-time recommendations for pumping combinations, based on demand, finding savings of 4.8% that could be achieved through pump scheduling. Three pumps required no maintenance, while four were deemed priorities for refurbishment, which would deliver further savings of 7.4%. Barrett added: “Our technology now


provides LVVWD’s operations team with the information they need to operate ageing assets and stations as efficiently as possible. “With real-time monitoring of pump


efficiency in place, degradation in performance can now be tracked. The LVVWD maintenance team also has access to valuable data which will enable pump refurbishment to be planned in advance at the most economic intervals”. While providing further training, Riventa is


also collaborating with LVVWD’s operations team to customise a control-room interface. This will ensure real-time information from FREEFLOW.


www.burkert.co.uk


Riventa www.riventa.com


12 APRIL 2021 | PROCESS & CONTROL


sing its thermodynamic FREEFLOW technology, Riventa monitored pumps at the Hacienda Water Pumping Station


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