Performance
Before:
PM17 is supplied by Metso, and there are three nips in
PM 17 Press Section: 1st Press Nip, 2 jumbo press rolls
with blind drilled rubber cover from other supplier; 2nd
Press Nip, Shoe Press; 3rd Press Nip, Smooth Press with
rubber cover.
Due to the limit of max machine speed around
580m/min, customer was badly in need of new way to improve
the running efficiency of press section; prolong the
interval of roll cover on machine, and also achieve
the target of energy saving. The lower dewatering with
20% open area on cover surface was hard to meet the
requirement.
Performance After:
In 1st Press Top Roll Position, PU Cover with Blind
Drilled and Groove was installed on machine instead
of Blind Drilled Rubber Cover. As customer appreciated:
1. In 1st press nip, the phenomenon of large
dewatering had been found, as the press efficiency was
improved, the dryness of sheet out from the nip was
also increased.
2. Despite of approaching the max speed, paper machine
ran smoothly and stably, and probability of sheet break
had also reduced, customers were very satisfied.
3. Until now RoliPress P has run for 3 months
without any problem. We can believe that in the future
not so far, the efficiency of total press section even
paper machine will achieve relative improvement.
In view of excellent performance of RoliPress
P-BDG, the customer decided to order another PU cover
from Rollianz Lihua used in same position of PM 18 which
is the sister machine of PM 17. Now this roll with RoliPress
P has been delivered back to mill and the customer plan
to install the roll so that the efficiency of dewatering
and energy saving is the main concern in the following
stage.
