Generators, backup power & batteries


surpassinG inDustrY stanDarDs witH pure water


For the power generation sector, improvements in productivity, cost and operational continuity are the key to meeting the growing challenges faced by the industry. Here, Kalpesh Shah, head of Sales Process Water at Veolia Water Technologies UK (VWT UK) looks at the importance of specifying a demineralised water system that can meet the most stringent standards.


boiler and the steam turbine, is a dependable source of high quality purified water. the efficiency and performance of these systems can be heavily impacted by the build-up of scaling and corrosion from water impurities. similarly, it is essential for boilers to have effective heat transference in order to maximise the energy from the heat source. Finally, turbine blades that are susceptible to contamination or corrosion can cause disruption to their operation, lead to a reduced functional lifespan, increased maintenance and downtime or even in the worst- case scenario – complete failure. Furthermore, within the


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wider industrial sector, there is a growing level of pressure to decrease total water usage. Fresh, potable water is becoming an increasingly limited resource that has in turn led to a rise in cost. For any factory that consumes large amounts of water day to day, these costs can quickly build up and cut into levels of profitability. mains water supplies


contain far greater levels of minerals and impurities than is recommended by boiler and turbine manufacturers. therefore, it is important to ensure that the correct high performance water treatment solution is adopted to resolve this issue and comply with the most rigorous standards, while also factoring in an efficient use of mains water. this is no easy feat – and with these challenges


in mind, implementing a system that utilises a combination of reverse osmosis (ro) and continuous electrodeionisation (ceDi) technologies is one of the most effective options currently available on the market. through a semi-permeable membrane, ro


systems separate as much as 99 per cent of the dissolved solids and particle impurities from a


ne of the most important factors to ensure the reliability and longevity of power generating assets, such as the


water supply. as feed water enters the membrane, the water molecules are allowed to pass through while the contaminants are captured and discharged. it should be noted however, that the effectiveness of these ro systems can vary so industrial facilities must look carefully at the performance of the chosen option. after the ro stage has taken place, ceDi can


then be used to polish the water to a high level of purity. by utilising electricity and ion exchange membranes, the high efficiency demineralisation process separates dissolved impurities (ions) from the water. this also means that the electric current from the ceDi process constantly regenerates the resin beds, leading to a simpler operation and no downtime. in addition to this, ceDi has a smaller footprint, lower operating cost and is far safer due to the lack of hazardous chemicals required, when compared to other technologies such as ion exchange. combining these two


technologies means that an incredibly high level of water quality can be continuously and reliably produced. as an example, when using vwt uk’s terion demineralised water solution, conductivity levels of less than 0.1 µs/cm can be achieved, as well as silica of less than 10 ppb and


total organic carbon (toc) of 200 ppb. However, it is important that the selected water


treatment solution can meet current and also future water volume requirements reliably and efficiently. For this, there are a range models available that can suit any industrial facility. During the specification process, practical


considerations such as energy usage, operating costs and plant footprint must also be considered. by installing a system that features high efficiency pumps and motors in its treatment process, energy costs can be kept relatively low. Furthermore, it is valuable to select systems that offer a combination of ro and ceDi technologies


34 november 2021 | FactorY&HanDLinGsoLutions


within a single unit. not only will this reduce the system’s total plant footprint, but also minimise installation and commissioning time. Finally, it is recommended to invest in water


treatment solutions that are compatible with remote monitoring technologies. this can help system operators to easily check the quality of the produced water with real time data, as well as automated alerts and notifications in the event of irregularities. in the event of an issue, through this type of monitoring, engineers can remotely access and view operational data, maintenance schedules and overall performance. these monitoring systems also enable optimisation to enhance the efficiency of the water treatment system and reduce costs further. vwt uk’s terion solution seamlessly integrates with the company’s Hubgrade digital services package, which utilises a secure, cloud-based platform to deliver real-time monitoring and optimisation. the importance of the engineering and technical


support available from the system supplier should also be considered. by installing a solution from a leading manufacturer, the company’s own team of engineers can provide help and guidance from the first steps of the initial specification process to continuous system support and maintenance. this can play a fundamental role in making sure the optimal water treatment solution is in place and operating as required. the quality of the water used for power


generation is crucial for both system longevity and reliability. selecting a water treatment solution that delivers a dependable and cost-effective supply of high quality water will reduce costs, minimise disruptions and maintain the operational life of water-using assets.


Veolia Water Technologies UK www.veoliawatertechnologies.co.uk


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