Paper360 - November/December 2017 - 16

trendspotting | REBUILDS & CONVERSIONS

New Press Section Rejuvenates
Greif Corrugating Medium Machine
The new shoe press section boosts productivity, improves quality,
and reduces energy consumption.
MARK WILLIAMSON

Mitch Heishman (left) and David Scott.

16

The new press section getting the finishing touches before startup.

The perforated uhle box covers provide better
felt dewatering at lower vacuum levels, and less
drag and wear on the felts.

The growth of containerboard
demand in recent years has spurred new production capacity and some grade conversions of
former publication paper machines. However,
there is a third and very viable option for containerboard producers to modernize key parts
of existing production assets-thereby boosting
productivity, gaining ground in quality and
trimming production costs.
The Greif Packaging mill in Riverville, VA,
is a case in point. As the focal point of the PM
1 rebuild, Greif replaced a 1975-vintage bi-nip
press section with a Valmet shoe press section.
PM 1 produces corrugating medium based on
hardwood semi-chemical pulp and OCC furnish.
The on-time and under-budget project,
which concluded in June 2015 after a 26-day
shutdown, was accomplished with no accidents in more than 100,000 man-hours. The
project included replacing the DC drives with
variable frequency AC drives, several wet end
improvements, a reel rebuild to accomplish four
set reels, and a winder rebuild with an autoslitter section.

rebuild we were competing against sheets made
with more modern press technology. We needed
to produce a product competitive in the marketplace while gaining operating efficiencies."
Regarding the press supplier selection, Scott
says, "The project team selected Valmet based
on the team, the technology they brought to the
project, and the recent successful projects that
the company had executed on similar grades."
Valmet also supplied the initial machine clothing and continues to do so today. "The project
team elected to give Valmet full responsibility,
essentially one source for the success of the press,
and that included clothing design," adds Scott.
Project execution was another important
ingredient. The project's success at all stages
was credited to meticulous attention to detail
and teamwork between Greif staff, suppliers,
and contractors. Mitch Heishman, technical
manager and Greif project manager, describes
some of the benefits of this attention to detail:
"The assembly installation and start-up phases
of the project went very well due to the preplanning in all phases of design, contractor

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David Scott, vice-president of mill operations for Greif Inc., summarizes the exceptional
results: "Prior to the rebuild, we were either drying- or drive speed-limited. This press section
project, in concert with a couple of others, has
enabled us to increase machine speed by 20 percent consistently while running the 23# grade."
He continues, "The press section has been
very reliable and threading through the press
is virtually automatic. All of the product characteristic goals set by the team were met or
exceeded. We now deliver a much drier, denser,
and stronger sheet to the dryer section, which
has improved the runnability of the machine
and greatly reduced its energy intensity. The
press is no longer a bottleneck. All the feedback
from the market has been positive."
MODERNIZING THE LARGEST ASSET
Scott explains the rationale behind the
rebuild. "This project was based on meeting
the needs of our customers, reducing the energy
intensity of the operation, and modernizing the
largest asset in our system," he says. "Before the

NOVEMBER/DECEMBER 2017

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Table of Contents for the Digital Edition of Paper360 - November/December 2017

Setpoint
Over the Wire
Rebuilds and Conversions
Proud to be a Papermaker
The New Cascades
Operational Data Helps Mills Meet Challenges
Papermaking Best Practices with Vacuum-Dewatering Systems: Part 2
TAPPI Library is an Industry Resource
Managing the Decline of Graphic Paper Demand
TAPPI Journal Summaries
2017 PPI Awards Finalists
TAPPI News
ASPI News
Index of Advertisers
Paper360 - November/December 2017 - Intro
Paper360 - November/December 2017 - cover1
Paper360 - November/December 2017 - cover2
Paper360 - November/December 2017 - 3
Paper360 - November/December 2017 - 4
Paper360 - November/December 2017 - 5
Paper360 - November/December 2017 - Setpoint
Paper360 - November/December 2017 - 7
Paper360 - November/December 2017 - Over the Wire
Paper360 - November/December 2017 - 9
Paper360 - November/December 2017 - 10
Paper360 - November/December 2017 - 11
Paper360 - November/December 2017 - Rebuilds and Conversions
Paper360 - November/December 2017 - 13
Paper360 - November/December 2017 - 14
Paper360 - November/December 2017 - 15
Paper360 - November/December 2017 - 16
Paper360 - November/December 2017 - 17
Paper360 - November/December 2017 - 18
Paper360 - November/December 2017 - 19
Paper360 - November/December 2017 - 20
Paper360 - November/December 2017 - 21
Paper360 - November/December 2017 - 22
Paper360 - November/December 2017 - 23
Paper360 - November/December 2017 - Proud to be a Papermaker
Paper360 - November/December 2017 - 25
Paper360 - November/December 2017 - 26
Paper360 - November/December 2017 - 27
Paper360 - November/December 2017 - 28
Paper360 - November/December 2017 - 29
Paper360 - November/December 2017 - The New Cascades
Paper360 - November/December 2017 - 31
Paper360 - November/December 2017 - 32
Paper360 - November/December 2017 - 33
Paper360 - November/December 2017 - Operational Data Helps Mills Meet Challenges
Paper360 - November/December 2017 - 35
Paper360 - November/December 2017 - 36
Paper360 - November/December 2017 - 37
Paper360 - November/December 2017 - Papermaking Best Practices with Vacuum-Dewatering Systems: Part 2
Paper360 - November/December 2017 - 39
Paper360 - November/December 2017 - Managing the Decline of Graphic Paper Demand
Paper360 - November/December 2017 - 41
Paper360 - November/December 2017 - TAPPI Journal Summaries
Paper360 - November/December 2017 - 43
Paper360 - November/December 2017 - 44
Paper360 - November/December 2017 - 45
Paper360 - November/December 2017 - 2017 PPI Awards Finalists
Paper360 - November/December 2017 - 47
Paper360 - November/December 2017 - TAPPI News
Paper360 - November/December 2017 - ASPI News
Paper360 - November/December 2017 - Index of Advertisers
Paper360 - November/December 2017 - cover3
Paper360 - November/December 2017 - cover4
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