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Verlässliche Feststoffmessung im Zentrat

Das Klärwerk Steinhäule an der Donau reinigt rund 40 Millionen m3 Abwasser im Jahr. Dabei entstehen rund eine Million m3 Klärschlamm, die so weit entwässert werden, dass sie in den beiden Wirbelschichtöfen der Anlage thermisch verwertet werden können. Die Schlammentwässerung konnte nun dank der Installation eines hochgenauen Instruments zur Feststoffmessung von Valmet deutlich verbessert werden.

Reel water jet turnup improves reliability and safety, case study

The use of water jet turnup systems at paper, board and tissue reels is growing. Safety, reliability and turnup efficiency are improved while bottom losses are reduced.

Reel safety requires extreme caution and good design features

Reeling is a high-speed, potentially dangerous process. Safe operation of the reel requires alertness on the part of all operating and observing personnel. This article lists general safety recommendations when in or near the reel.

Differential drive inspection - clutch, PIV, bearings and gears

The differential drive supplies power to the individual machine sections, and maintains a constant preset speed between those sections. The slightest speed difference between sections can result in a sheet break and lost production. Knowing the drive components and what to look for helps in preventive maintenance.

Securing efficiency and continuous reliability improvement for your machine

Most equipment failures are random. For high value, critical equipment this program proactively does the right work at the right time and maximizes reliability.

Flexible Service Agreement: Easy budgeting with predicable costs

Valmet now offers a fixed price volume purchase agreement to improve mill operations. Regardless of service type, maintenance costs will now be predictable.

VacRoll suction holes and grooves should be cleaned regularly

VacRoll suction holes and the grooves of all rolls should be cleaned regularly, as they may get completely clogged due to web moisture, particularly at the start of the dryer section. Bearing housings also need attention. Proper handling of the rolls is also important.

Wet streak caused by corrosion of roll shell, case study

A wet streak leads to combined investigation by mill personnel and Valmet roll specialists. A suction roll cover is removed and analyzed, after which a metallurgist inspects the roll. The mill mechanic provides a key insight...

Never straighten bent reel spool journals - safer to replace them

Reel spools carry more load for their size than any other roll in the paper mill. Bent journals can break, causing the log to fall from the reel or storage reels onto the floor and bump into equipment and personnel.

SymRoll recommended maintenance - End seals & roll overhauls

For trouble-free functioning of SymRolls, the following are recommended maintenance regarding the end roll seals and overhauls (complete or regular operation).