Wednesday, 27 June 2018 09:18

Valmet launches a new tool to monitor former dewatering

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Valmet extends its quality control systems expertise to the paper and board machine forming section with the introduction of the Valmet IQ Dryness Measurement (IQ Dryness). Utilizing microwave technology, the IQ Dryness measures the water layer thickness on the web, which can be used to calculate the web dry content. As well as removing most of the water, the majority of paper properties are also developed in the forming section. The inclusion of IQ Dryness in Valmet's paper quality control family opens new possibilities as it helps to close the information gap between the stock approach system and dry end quality sensors.

"Perhaps the biggest effect is the better management of dewatering. This has a great influence on the amount of the subsequent drying energy needed with potentially big cost savings in paper production. An increase of just 1% in dryness before the dryer can reduce the amount of energy needed to evaporate the excess water by approximately 4%," says Marko Toskala, Director, Quality Management Solutions, Valmet.

Continuous measurement of water removal with IQ Dryness provides energy savings with vacuum optimization, quicker startups, faster grade changes, fewer breaks and improved break recovery.Continuous measurement of water removal with IQ Dryness provides energy savings with vacuum optimization, quicker startups, faster grade changes, fewer breaks and improved break recovery.

All grades and furnishes

Unlike other measurement technologies, Valmet IQ Dryness is not sensitive to conductivity which makes it suitable for use with all grades of paper and board. As well as energy savings with vacuum optimization; quicker startups, faster grade changes, fewer breaks and improved break recovery are just a few of the benefits that continuous measurement of water removal makes possible.

Optimized dewatering not only improves bonding for multilayer board machines but can also reduce the problems of blow induced breaks caused by excess moisture in the middle layer entering the drying section. Additionally, the measurement facilitates the online monitoring fabric condition together with improved troubleshooting of pulsation, vibration and other quality destroying wet end problems. The sensor's small size enables measurement in places inaccessible earlier.

Complete moisture management

This new sensor joins the Valmet IQ family of single point and scanning measurements to provide papermakers with a complete picture of MD and CD moisture from the forming and press sections, dryer and size press right up to the reel. Together with sophisticated moisture controls and an extensive range of actuators to control moisture levels and profiles, Valmet can close the loop to offer improved efficiency and runnability as well as better paper quality and printing properties.

Additional Info

Valmet is the leading global developer and supplier of process technologies, automation and services for the pulp, paper and energy industries. We aim to become the global champion in serving our customers.

Valmet's strong technology offering includes pulp mills, tissue, board and paper production lines, as well as power plants for bioenergy production. Our advanced services and automation solutions improve the reliability and performance of our customers' processes and enhance the effective utilization of raw materials and energy.

Valmet's net sales in 2017 were approximately EUR 3.1 billion. Our more than 12,000 professionals around the world work close to our customers and are committed to moving our customers' performance forward - every day. Valmet's head office is in Espoo, Finland and its shares are listed on the Nasdaq Helsinki.

Read more www.valmet.com

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