30 PROJECTS & CONTRACTS INDUSTRY NEWS
New sizing technology for Niederauer Mühle
of its white top liner grades with the installation of a sizer and auxiliaries on the PM3 containerboard machine at its Kreuzau mill in Germany. Speclializing in white corrugated medium paper with basis weights between 120 and 200 g/sqm, Niederauer Mühle produces more than 300,000 tons of paper each year.
P Using technology supplied by
Valmet, the sizer installation will be augmented with a calender rebuild, an air dryer, starch
apierfabrik Niederauer Mühle is planning to improve the strength properties
preparation and starch supply systems as well as ropeless tail threading equipment. “The new sizer will combine the best features of both spray
application and film application, and improve the strength properties of the white top liner grades,” said Ilkka Naatti, product manager for coaters and sizers at Valmet.
“The main advantages of the back side spray application technology compared to conventional starch application method are drying energy reduction, fast and accurate starch amount control as well as elimination of wearing parts. The top side film application ensures excellent properties of the white top liner surface. “Niederauer Mühle will also be the first paper mill in the Central Europe to benefit from the advantages of safe, reliable and fully ropeless tail threading technology in the size press area. After the rebuild the tail threading process of PM3 will be totally ropeless for all machine parts.”
Burgo Ardennes mill bleaching process stabilised by Metso
The Burgo Ardennes mill in Belgium has refined its bleach plant operation and achieved an 8.7 per cent saving in bleaching chemicals with improved brightness stability by adopting Metso’s Bleaching Optimization process. A continuous improvement programme extends the gains for the mill. Following a detailed process
control audit by Metso, improvements have also been achieved by a successful implementation of advanced controls based on new Metso Kappa Q and Metso Cormec 5 analyzers. The mill produces 400,000 tonnes a year of mixed hardwood bleached kraft pulp, which presented a particular
July/August 2014
control challenge. Metso’s team effectively implemented the control based on in-depth knowledge of the process and how to deal with disturbances. Since the project was completed in the summer of 2013, stability has been maintained and augmented by a continuing Performance Service Agreement (PSA), says Metso. After initial commissioning, the controls have been adapted to significantly higher production rates in the latter part of 2013. The service includes process monitoring though a link to Metso and 24/7 telephone help services. Daily and monthly remote diagnostic reporting by Metso outlined specific process improvements
that were implemented with positive results. Improvements in chemical utilization are continuing. Fibre line production manager Eric Bazzoni commented: “Our goal with the new measurements and controls was to stabilize the process and reduce costs. Now, we have a big advantage because we can achieve the right brightness even at higher production rates. Before, it was difficult to achieve stability from shift to shift, as operators would manually change parameters. Now, the control system adjusts by itself, and the parameters are the same. We do not have any off-specification pulp.” Chemical consumption is kept to a minimum since the residual
chlorine dioxide after the bleaching towers is at a very low level, said Bazzoni. Additionally, there are no problems with off-gassing that might cause health, safety and environmental problems. Pierre Carnevali, mill projects manager, added: “I am impressed that the Metso engineers have adapted the controls to our own process, giving us a tailor-made control solution for our mill.” Bazzoni finds that the continuing
process performance services is a useful tool, as it gives a concise report on key control objectives and uncovers any problems. Carnevali adds, “The reports tell us if we are in a good control range or not, and if we are consuming the right amount of chemicals.”
Pulp Paper & Logistics
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36