Runtech Systems rebuilds vacuum system and improves dewatering at Enstra Paper (Pty) Ltd PM6, South Africa. The delivery includes two low vacuum blowers, three EP600 Turbo Blowers with EcoDrop and EcoSep water separators and an EcoFlow dewatering measurement system for couch save-all and full press section. The new RunEco system replaces 16 liquid ring pumps, which significantly reduces both energy and water consumption. Delivery also includes new double doctor for 1st press bottom roll and suction roll save-all with integrated double doctoring.
“We selected Runtech because their vacuum system is compact, simple and flexible. Runtech understands full paper making process so they were capable of offering a total solution that includes doctors and dewatering measurements in addition to turbo blowers. Measuring water flow accurately is essential for optimizing vacuum levels,” says Nic Campher, Head of Paper, Enstra Paper.
“In case of a bigger rebuild it is essential that vacuum system has flexibility so that vacuum levels can be optimized after the start-up. In many cases machine suppliers oversize the vacuum systems by 30-50% so by selecting an unsuitable supplier, end customers will pay extra operating costs. Difference in vacuum system power consumption is easily 25-30%.
Combining dewatering improvement and EcoFlow system with vacuum system rebuild often brings very significant benefit. We have seen up to 1.5% increase in dryness after press and 20-30 m/min increase in machine speed. Optimized vacuum level will reduce vacuum system power consumption even further as well as press section drive loads,” says Jussi Lahtinen, Sales Director, Runtech Systems.
About RunEco vacuum system
RunEco vacuum system is developed specially to take into account the challenges and demands related to the dewatering and runnability of paper machines. EP Turbo Blowers are designed to operate efficiently across a wide range of vacuum levels and air flows allowing paper mills to optimize vacuum levels. High speed motors, driven by frequency converters, allow a typical EP Turbo Blower to provide vacuum levels between 30 and 70 kPa. A wide range of impeller designs allows highly efficient levels across the operating range.
The EP Turbo Blower's water-free design not only reduces water and chemical consumption within the vacuum system but also eliminates the need for water-related equipment like cooling towers and circulating pumps. Nip dewatering, combined with doctoring, significantly improves energy efficiency and machine performance. A well-designed and operated dewatering and doctoring system is crucial for both energy consumption and paper quality. Runtech’s EcoFlow, save-alls, and double doctors offer a tailored approach to meet these needs.
About Enstra Paper
The Enstra Paper site is based in Springs close to Johannesburg. With over 60 hectares of manufacturing space, Enstra Paper is not only strategically located in South Africa with regards to proximity to the largest waste paper supply, but also the biggest market for recycled paper. Due to these factors Enstra is a leading producer of recycled wastepaper grades in the country. With two uniquely capable paper mills on site, Enstra is positioned for the growing consumer market. Enstra produces high quality security paper and packaging paper products for use throughout the industry. PM6 produces Containerboard and PM2 Bag Grades and other specialty grades. Drawing upon a successful history of over 75 years, the name “Enstra” is derived from its chief raw material: Enterprise Straw. Enstra is part of the Corruseal Group.
Read more about RunEco solution: https://www.runtechsystems.com/en-fi/energy-and-vacuum-systems
Runtech Systems is a global provider of engineered systems tailored to the pulp and paper industries. Runtech works with customers to better understand and control their operational conditions to maximize efficiency and cost effectiveness.