14 VALMET
Pulp Paper & Logistics
3
the new headboxes can produce the same quality from lower- quality fibres, but with a much higher yield. “Another obvious difference
was that the rebuild enabled us to convert PM2 to produce paper with a lighter basis weight of 110-130 g/sqm, and the running
speed increased by 30 m/min,” Xiong adds.
Short 86-hour shutdown The shutdown of both machines to install the new headboxes was planned carefully to minimise the necessary downtime, and took only four days from switching off to start-up. “Thanks to our combined
efforts, the project started up ten hours ahead of time,” says Peng who acknowledges the good service attitude of Valmet personnel.
“Technical stability was one of the most important things we considered when choosing suppliers. Valmet met our strict requirements,” says Xiong. “The headboxes are good in many aspects, such as low pressure loss, good formation, and easy operation. The profile adjustment control system is top class as well.”
Better runnability, web uniformity and quality with automation Yinzhou Paper’s paper making machines were equipped with Valmet DCS and QCS controls, which helped a lot in getting the results that operators wanted.
3Peng Guojun, production manager of Yinzhou Paper (right) and Jiang Yuanlong, Valmet’s start-up engineer
March/April 2017
Results from the Valmet IQ Optiflo scanner were unexpectedly good
They also selected Valmet IQ scanners and profilers to replace their old installations, and performance has improved with better runnability, web uniformity and quality. “Personally, I think the Valmet
IQ Scanner is perfect,” says automation manager Chen Yongfa. ”First of all, it has stable runnability, and the system interface is easy for the operator. Secondly, its design is very good. The special floating bridge bearing design allows thermal expansion without beam distortion. The filtered air purge system also ensures temperature stability and maintains internal cleanliness. Thirdly, it can provide high
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