26 PRODUCTS & SERVICES
Know how your pulp fibres are being treated
A
fibre analysis tester that reveals how pulp fibres are treated during stock preparation or in the
pulp mill has been launched by Lorentzen & Wettre, a member of the ABB Group. Through the tester’s new fibril
index – a measure of the fibril’s bonding capability – and its ability to classify different types of fines, the device shows manufacturers if goals, such as larger contact areas, are achieved, or if energy is unnecessarily expended by the process. The tester is said to monitor pulp
fibres more thoroughly than any other technique, thereby giving a more comprehensive view of fibre properties during the production process. This enables papermakers to adjust operations and obtain reproducible inter-batch strength characteristics. The L&W Pulp Tester Fiber Morphology Plus has many potential applications throughout the pulp and paper process,
such as controlling refining with Canadian Standard Freeness (CSF) or Schopper-Riegler (SR) measurements, testing optical properties of incoming pulp or monitoring true process consistency. The tester uses a high resolution
camera and is fully automated, being directly connected to the process pipes through online samplers. Results are reported every eight minutes. CSF and SR are well-known
dewatering measurements in stock preparation to ensure paper strength and ability to run on the paper machine but are limited in the results they offer. It is not uncommon, however, for papers with the same CSF or SR value to vary in strength. Monitoring the fibril index shows how the fibers are treated and if a larger contact area is achieved by roughening the fiber surface. While fines have negative
effect on dewatering, there is one fines class that has a positive
effect on sheet strength. The tester enables the two different classes to be monitored instead of just the total amount of fines. By distinguishing between the effects of the two different types of fines, papermakers can calibrate settings more efficiently to yield desired sheet outcomes by better predicting what effect a given combination will have on dewatering and strength. “By monitoring and analyzing fibril index and fines classes in real time papermakers have the chance to change settings to avoid wasting raw material, energy or other resources and to minimize costs,” says Anna Schärman, Global Product Manager at Lorentzen & Wettre.
Additionally, automated monitoring by the system, through on-line samplers, takes the variability caused by human intervention out of the equation. Its increased speed is another benefit over manual measuring systems.
Machine clothing and diagnostic systems launched at MIAC
A range diagnostic systems from Italy’s Cristini will be showcased at the MIAC 2015 show in Lucca in October. The range will feature the
EasyScan family of traversing beams, with the 100, 300 and 500 versions available either for the transportation of portable felt scanners or equipped with DCS integrated sensors for the measurement of felt moisture
September/October 2015
and permeability. Cristini says the beams are guaranteed maintenance free, with an extremely compact design to fit virtually any position on a
paper machine. Amongst its range of innovative paper machine clothing, Cristini offers endless and pin seam press fabrics as well as forming fabrics
Lorentzen & Wettre’s pulp fibre monitor is compact and integrates easily into operations
“A lot can happen in the three
hours it can take to test samples by hand,” Schärman says. “By the time the manufacturer realises there’s a problem, considerable production will have occurred. “Or, alternatively, the papermaker
may see that they used more raw material than they had really needed but it will be too late, by then, to take any cost minimising steps.” More information from http://l-w.
com/produkt/lw-pulp-tester-fiber- morphology/ or Anna Schärman, Global Product Manager, Lorentzen & Wettre, Sweden. Tel: 46 72 524 80 10. Email:
anna.scharman@
se.abb.com
designed for all paper machines. Being launched at MIAC is
Cristini’s EnerMaster, a new forming fabric designed especially for packaging grades to increase forming quality, while reducing energy costs. A new line of spiral dryer fabrics for all grades called MaxSpiral, which Cristini says offers ‘maximum stability for maximum life’, will be also presented at Booth 106. More information from S.A. Giuseppe Cristini SpA, Via Bombardieri, 5, 24020 Fiorano al Serio (BG) Italy. Tel: 39 035 715111. Fax 39 035 711451.
Pulp Paper & Logistics
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