|JAPAN TAPPI JOURNAL
Vol.63 No.1 Abstracts
The Latest Low Consistency Pulper Technology -IntensaPulperTR
-Developing Story of the Innovative LC Pulper-
Stock Preparation Group, VOITH IHI Paper Technology
The IntensaPulperTR, which was developed by VOITH
IHI Paper Technology Co. (VPIT) and released 2006,
is really innovative pulping machine with extraordinarily
higher performance than the conventional low consistency
pulpers and as result VPIT has received this year’s
honorable “Sasaki Award” of JAPAN TAPPI.
In this paper, VPIT will show the development procedure
of the IntensaPulper, that is, the research and development
stage at the VPIT R&D center and the field trial
with the commercial size of the proto type IntensaPulper
at Oji Paperboard Co., Oita Mill.
The other advantages which will be gained by applying
the latest IntensaPulper technology will be also
Sludge Dewatering Machine, Rotary Press Filter
-Dewatering of Paper Making Waste Water Sludge-
Tomoe Engineering Co., Ltd.
The sludge dewatering machine used in wastewater
treatment is important equipment for volume reduction
and solidification of sludge. The sludge dewatering
machine is required to have higher dewatering capacity
and be more energy saving and efficient to realize
low-cost wastewater treatment. To meet these needs,
Tomoe Engineering has introduced Rotary Press Filter
from Fournier Industries Inc. of Canada, made improvements,
and has been manufacturing and selling the equipment.
Key features of Rotary Press Filter include high
dewatering capacity, low power consumption, small
footprint, small amount of washing water, easy odor
control, and easy maintenance. In recognition of
the achievement of these features, Rotary Press Filter
wan the Sasaki Award. This paper introduces the treatment
capacity and effect of introduction of Rotary Press
Development and Operating Experience of the Newest
Hideyuki Goto and Isao Aoki
Ishinomaki Mill, Nippon Paper Industries Co., Ltd.
Nippon Paper Group, Inc. has prepared its “Group
Vision 2015”, which calls for becoming one of the
top five pulp and paper company in the world, with
a view to realizing stable and high revenues in our
domestic businesses and a full-scale expansion of
our businesses overseas over the next ten years.
Then, we installed the N6 paper machine in the Ishinomaki
Mill of Nippon Paper Industries Co., Ltd. as a first
step of our vision, which is mainly producing a light-weight
coated paper and an ultra light-weight coated paper,
and started its operation in November, 2007.
We also installed the new de-inking pulp plant
which is called “HDIP-2” in order to supply high
quality de-inking pulp to N6 paper machine. Regarding
the installation of the HDIP-2, we designed its process
to optimize the efficiency of deinking and reject
system in relation to becoming poor quality of old
paper in the near future. Especially, we have developed
a newest 4-shafts kneader “UV-Breaker” with Aikawa
Iron Works Co., Ltd. and installed it as a coarse
kneader in the HDIP-2 process in order to manage
any old papers with UV printing.
In this report, we show our development and operating
experience of the newest kneader.
Operating Experience of Formmaster
Kasugai Mill, Oji Paper Co., Ltd.
Oji Kasugai No.8 machine started up in 1962. The
unit, which has a wire width of 5.81m and a design
speed of 700m/min, produces 330t/d unbleached kraft
paper for wrapping and taping.
Recently, because of speeding up of processing machine
at the customer and diversification of end products,
higher quality is required increasingly, such as
good runnability and sheet strength. To meet these
demands, we installed high-speed shaking equipment
“Formmaster” from Metso in January 2007. It enabled
us to enhance paper quality and to improve production
This paper will present the outline of “Formmaster”
and our experiences in its operation.
Operating Experience of No.3 Incinerator
Environmental Section, Niigata Mill, Hokuetsu Paper
In the fall of 2004, Niigata mill considered replacing
the old sludge incinerator. As a result, we formed
a project to build a new one that works not just
as an incinerator but also as a biomass power boiler
in order to reduce energy cost. It uses paper sludge,
demolition wood and RPF (Refuse Paper and Plastic
Fuel) as Fuel.
At that time, the biomass power generation was being
supported through a new energy promotion project
sponsored by Agency for Natural Resources and Energy.
The following year, the construction of new biomass
power boiler began. And Niigata mill made a trial
run of the boiler at the end of 2006. Now, we’ll
report some specific things we learned about new
biomass boiler form its one year period of operation.
An Evaluation of Light Scattering Property in Printing
Masayuki Takishiro, Yukio Kotori and Shinichi Inoue
Process Development Laboratory, Corporate Research
Center, Mitsubishi Paper Mills Limited
Light scattering phenomena in paper can be represented
by the Modulation Transfer Function (MTF) of paper.
In this paper, a new technique for measuring the
MTF of paper is introduced. We have developed an
experimental instrument for measuring the MTF of
paper. It can project a sinusoidal test pattern on
sample paper. The reflection intensity distribution
of the projected sinusoidal test pattern is measured
by the CCD camera. The MTFs of different type of
printing paper were discussed.
Improvement of Pulpwood Productivity of Fast Grown
Eucalyptus and Acacia Tree Species in Southeast
Forestry Research Institute, Research & Development
Division, Oji Paper Co., Ltd.
This paper explains the historical activities
of the Forestry Research Institute of Oji Paper Co.,
Ltd. in improving pulpwood productivity of plantations
in Lao PDR and Vietnam. Improvement of productivity
in Vietnam has been attained by selecting and planting
hybrid clones of Acacia mangium x A. auriculiformis.
The clones were selected for good growth performance.
Then, high wood density clones were selected from
them. In Lao, Eucalyptus deglupta x E. camaldulensis
showed the best performance in clonal trials and
we have confirmed that it has satisfactory pulpwood
quality. There is no pure Eucalypt species with satisfactory
performance in Lao. Therefore future direction on
Eucalypt breeding is in making inter-specific hybrids.
We have collected and are field testing various Eucalypt
genetic resources from which we are planning plus
tree selections of pure species for the production
of hybrids in the near future.
The Making of Paper Contributes to Local Environment
-Paper Made from Bamboo-
Pulping Section, Sendai Mill, Chuetsu Pulp & Paper
Kagoshima Pref., where the Sendai Mill is located,
has the largest bamboo forests area in Japan, and
typical species named Moso bamboo covers an area
of 7,600ha. Since well controlled bamboo forests
produce a good quality of bamboo shoot, it is said
that we need to eliminate bamboo older than five
years every year. However the eliminated bamboo has
been left in the forest usually. Kagoshima Pref.
has been in the process of establishing an efficient
system of recycling the eliminated bamboo, in order
to maintain healthy bamboo forests and to contribute
to producer’s profit.
Sendai mill has focused on this local peculiarity
and has begun production of paper made from bamboo
pulp, from the global view points such as protection
of environment, prevention of global warming.
Development of On-line Fiber Orientation Control
-Improvement of the Quality of Copy Paper-
Hidenori Yatomi, Michihiro Fujiyama and Yoshisada
Yatsushiro Mill, Nippon Paper Industries Co., Ltd.
Junji Yamamoto, Hidenobu Todoroki, Katsumasa Ono
and Takashi Ochi
Pulp and Paper Research Laboratory, Nippon Paper
Industries Co., Ltd.
Takashi Sasaki and Hirofumi Sano
P&W Solution Dept., Yokogawa Electric Corporation
A new automatic control system for fiber orientation
has been developed. In this system, the fiber orientation
on both paper surfaces is measured continuously,
and the edge flow valves and the slice lip actuators
at the headbox are manipulated automatically to minimize
the differences of orientation angles between the
felt and wire sides of paper. We confirmed the validity
and stability of the system on the actual paper machine.
By this automatic control system, the average degree
of twist-curl of paper is able to be reduced to less
than half before and it is possible to produce copy
paper with low degree of twist-curl continuously.
Moreover, this system is quite efficient to shorten
the time needed for adjusting the machine conditions
to have enough quality for the copy grades after
the startup of paper machines. This system has been
installed in an actual paper machine and has been
effectively controlling the twist-curl of copy paper
since the beginning of 2007.
A Report on 2008 Engineering, Pulping, Environmental
Conference and International Bioenergy and Bioproducts
-August 24-29, 2008 in Portland, USA-
Shisei Goto, Reiko Oshima*1, Hiroyuki Nagatani*2,
Hitoshi Okada*3 and Kunitaka Toyofuku*4
*1Nippon Paper Industries Co., Ltd.
*2Oji Paper Co., Ltd.
*3Japan Pulp & Paper Research Institute, Inc.
2008 Engineering, Pulping, Environmental Conference
and International Bioenergy and Bioproducts Conference
(24-29 August) were held for six days under the auspices
of TAPPI in Portland, USA. Probably it is the first
event for TAPPI to hold two conferences in succession.
There were 98 presentations on EPE and 30 presentations
on IBBC. Five persons including Mr. Toyofuku, as
representative of JAPAN TAPPI, attended the conferences.
Before and after the conferences, we visited, a felling
spot of Weyerhaeuser and head office of TAPPI.