JAPAN TAPPI JOURNAL May
2008
Vol.62 No.5 Abstracts
Biorefinery in the Pulp and Paper Industry
Keiichi Nakamata
Technical & Development Div., Hokuetsu Paper Mills, Ltd.
Abstract
Technological development of biorefinery is being proceeded all over the world.
Biorefinery is the technology which creates bioethanol and plastic from biomass
as the raw materials, and it aims for an action to oil resources drying up and
global warming prevention. Raw materials of biorefinery are mainly sugar, corn,
cellulose-based material and so on. The use of cellulose-based material as a
biomass is dominant in order to avoid competition with provisions.
Technology of the pulp and paper industry is applicable to cellulose-based biorefinery.
Energy Saving by “Intensa Pulper” of Stock Preparation System
Takeshi Murakami
Research & Development Dept., Voith IHI Paper Technology Co., Ltd.
Abstract
In recent years, various technical innovation was achieved in the field of secondary
fiber system. As result, power consumption of the secondary fiber system has
been reduced to 100 to 130kWh/T from 200kWh/T of more than ten years before.
Such improvement has been mostly derived from progress of the screen technology,
particularly the LP Screen that was developed by Voith IHI Paper Technology (VIPT)
is significantly contributing to the progress.
Regarding the low consistency pulper which will be most important machine as
well as the screen in the secondary fiber system, there have been few technical
innovation for about 30 years. However, the Intensa Pulper which has been developed
and released by VIPT is really innovative machine and might change the design
concept of the secondary fiber system from now on. Energy consumption of the
OCC treatment system is now going to be reduced to 50kWh/T by application of
the Intensa Pulper.
Steam Saving by Waste Heat Recovery from Machine White Water
Tomoyuki Sakashita
Mitsubishi Paper Engineering Co., Ltd.
Abstract
We have taken measures to reduce the energy consumption as one of the environmental
improvement plan based on ISO 14001 standard in the Hachinohe mill of the Mitsubishi
Paper Mills, Ltd. Company since 2001. And the target of the plan is to reduce
the ratio of steam and electricity consumption to the paper production in the
mill at the rate of 1 % every year.
Therefore we investigated the actual conditions of processes in the mill and
made a plan to save water from the point of view of decreasing the amount of
heat loss in waste water from the mill in order to reduce steam consumption.
Based on the plan, some measures have been carried out since 2002.
In this paper we describe the way to make the best use of hot water from machine
white water and how to make compact of a filter plant which is for recycling
white water from paper making process.
Introduction of Latest Energy-saving System for Waste Paper Treatment
-Possibility of Energy-saving for Pulper, Screen and Refiner-
Kazuo Aoshima
Aikawa Iron Works Co., Ltd.
Abstract
Recently saving energy is most important target in the pulp and paper industry
in Japan because of CO2 exhaust amount reduction. There are many machines to
use big power at stock preparation. Therefore we would introduce a result of
energy saving by our new technology for Pulper, Screen and Refiner.
Energy Saving by Installing the New Model of Refining Plate
Tsutomu Otani
Ishinomaki Mill, Nippon Paper Industries Co., Ltd.
Abstract
In the pulp refining process, generally double disk refiners (DDR) are installed.
Pulp refining needs much energy, so that to develop energy saving technology
of pulp refining is one of the most important objectives. However, energy saving
technologies of pulp refining sometimes causes pulp strength declining, so that
the balance between energy saving and pulp strength is very important.
Recently, the new model of refining plates "FineBar (Aikawa Iron Works Co.,
Ltd.)", which is made by stainless steel and has 1mm-width blade, was installed
into our DDR for bleached hardwood kraft pulp. This installation results power
consunpution is decresed even though pulp strength is maintained.
In this report, we introduce a case of saving energy by installing the new model
of refining plate.
Energy Saving and CO2 Reduction Case in Power Plant
-Boiler Fuel Conversion by Installation of LNG Satellite Facilities and Installation
of High Efficiency Steam Turbine-
Tadashi Arifuku
Tonegawa Mill, Rengo Co., Ltd.
Abstract
In line with increasing social demands on environmental conservation, Rengo
has established Eco Challenge 009, a document setting forth our environmental
vision, and is implementing resource and energy savings activities. As part of
our efforts, Rengo targets to achieve 12% reduction of CO2 emissions from the
1990 level by
2009.
This paper will introduce LNG satellite facility and high efficiency steam turbine
installed at Rengo Tonegawa Division. The effect of fuel conversion and high
efficiency turbine installation, such as reduction of CO2 emissions, will also
be examined.
Steam Saving by Pre-evaporator System
Tomoya Kujime
Takaoka Mill (Noumachi), Chuetsu Pulp & Paper Co., Ltd.
Abstract
The necessity for energy-saving is increasing increasingly with the jump of
the fuel cost not stopping. With the exception, there is also no pulp and paper
industry and it is tackling each company energy-saving. As one of many of the
energy-saving measures, pre-evaporator was installed at the Takaoka mill in May,
2007, and it is working formally from June.
A main subject reports the energy merit by steam saving by it. This system installs
3 stages plate-type evaporator, a vacuum pump, and a condenser after flush cyclones.
Black liquor extracted from digester repeats a self-flush by three steps of flush
cyclones, and is led to pre-evaporator. Then, it is condensed about 2 percent
by the solid base, and is sent to main evaporator. The vapor condensate from
the flush cyclone is separated into the high B.O.D. liquor and the low one：therefore
this system makes processing of the foul odor water the minimum.
Energy Saving by Changing Operation Range of Sootblowing Extracted from Steam
Turbine
Takehiro Tanaka
Niigata Mill, Hokuetsu Paper Mills, Ltd.
Abstract
The prevention global warming and the saving energy are increasing their importance.
In recent years, the attempt for saving energy such like reducing the consumption
and improving the cost due to rising prices of fossil fuel have became an important
issue. Hokuetsu Paper has actively worked on improving resource and saving energy
based on the fundamental philosophy and principle in “Hokuetsu Paper Environmental
Charter”.
In April 2005, for the purpose of reducing the environmental load and highly
effective operation, No.8 power generator was built. The power generator consists
of soda recovery boiler which has the biggest black liqueur solid resolve capacity
in Japan and an 85Mw steam turbine. In February 2007, No.3 biomass boiler which
burn the paper sludge, the RPF and the waste wood chip was built, which works
more on reducing fossil fuel and minimizing environmental load. In changing the
plant operation, effective management and saving energy in power supply section
is the biggest issue in all over companies.
In this study, increasing extracted steam power generation by expanding the
operation range of first extracted steam in No. 8 steam turbine and energy saving
examination which reducing sootblower steam flow are introduced.
Development of High Performance De-inking Agent
-LIPOBRIGHT Series-
Tomoyuki Nogawa and Takashi Tanaka
Paper & Pulp Group, Specialty Chemical R&D Department,
Research & Development Division, NICCA CHEMICAL CO., LTD.
Abstract
It is important to use regenerated pulp not only to protect forest resources
but also to prevent global warming by control of carbon dioxide exhaustion. In
paper manufacturing industry, technologies of recycle paper have progressed and
high quality regenerated pulp is produced a lot with user’s specific needs. Such
recycling resources have become important more and more. On the other hand, profits
of the used paper decrease because of sudden rise of oil price and increase of
export amount to China. Therefore, development of high performance and high efficiency
de-inking agents is strongly demanded. We have developed LIPOBRIGHT DP-100 series
recently. Those have so high de-inking property that realizes reduction of the
usage compare to conventional de-inking agents. Those impart stable de-inking
operations because of less sensibility of temperature changes at flotation stage.
We report herein newly developed LIPOBRIGHT DP-100 series.
Material Retention: A Novel Approach to Performance of Pigment Coating Colors
Ken McKenzie, Anne Rutanen, Jukka Lehtovuori, Jaana Ahtikari and Teuvo Piilola
CP Kelco Oy
Abstract
Continually increasing machine coating speeds together with new coating color
components have put more emphasis on the importance of the correct rheology and
water retention of the coating colors to achieve good runnability and end product
quality.
In the coating process, some penetration of the aqueous phase, to the base paper
or board must occur to anchor the pre-coating to the base or the topcoat to the
pre-coat. The aqueous phase acts as a vehicle not only for the binder, but also
for the other components. If this water or material penetration is not controlled,
there will be excessive material shift from the coating color to the base, before
immobilization of the coating color will stop this migration. This can result
in poor machine runnability, unstable system and uneven coating layer, impacting
print quality.
Rheology modifiers or thickeners have tended to be evaluated on the performance
of the coating color by the term, “water retention”. This simple term is not
sufficient to explain performance changes during coating. In this paper we are
introducing a new concept of “material retention” considering the control of
all of the movable material including water in the coating color. Controlled
material retention leads to uniform z-directional distribution of coating color
components. The changes that can be made to z-directional uniformity will have
positive effects on print quality as measured by ink setting properties, ink
gloss, mottling tendency, surface strength, optical properties, such as light
scattering, whiteness and light fastness delivery should be improved.
Endless Challenge for Longer Bearing Life
Kunio Osaki
Schaeffler Japan Co., Ltd.
Abstract
General speaking, all bearing manufacturer has been trying to improve bearing
life time. In these 4-3 years, after integration of INA and FAG, Schaeffler has
been trying to improve bearing life time based on surface modification, and successfully
improved bearing life time by 50% - 70% as a result of combining INA/FAG production
technology. Schaeffler would like to report about contents of longer life(X-Life)
version.
Case Study of Energy Saving Using OSIsoft PI System
-Energy Management System Using the RtPM Platform-
Shizuo Itoh
OSIsoft Japan KK
Abstract
In recent years the efficient management of the energy usage is becoming increasing
critical to company profitability. Industry leaders are looking for methods to
gather and analyze energy usage data in real-time rather than just tracking energy
costs versus production on periodic basic.
Using the RtPM (Real-time Performance Management) platform from OSIsoft, several
industry leaders are building cost effective energy management systems for automatically
gathering, analyzing and reporting data on energy consumption and costs in real-time.
The PI system has become one of the most successful and widely used RtPM platforms
in the pulp and paper industry. This paper introduces about outlines of PI and
case studies of energy saving application using PI.
A Report on the 8th Research Forum on Recycling
Shisei Goto
Nippon Paper Industries Co., Ltd.
Junsuke Kawana
Oji Paper Co., Ltd.
Abstract
The conference, “the 8th Research Forum on Recycling” was held in Niagara-Falls,
September 23-27, 2007. The forum was jointly organized by PAPTAC and TAPPI and
continued its history of cutting-edge research results on recycle fiber. There
were approximately 150 attendees from around the world including 4 delegates
from Japan. The programs had 13 sessions featuring 34 oral presentations including
2 panel discussions, one workshop regarding stickies, and two mill tours. The
trends of presentations were summarized and notable researches were cited in
this report.
A Study on Quantitative Determination of Fluorescent Brightening Agent Contained
in Paper
Maiko Kaji, Toshiharu Enomae and Akira Isogai
Graduate School of Agricultural and Life Sciences, The University of Tokyo
Abstract
It is prohibited under the Food Sanitation Law to add fluorescent brightening
agent (FBA) to paperboard for food packaging. However, a certain amount of FBA
inevitably comes to be mixed in paperboard produced mainly from recycled pulp.
For adequate decomposition or removal, quantitative determination of FBA was
investigated. Logarithm of the fluorescence intensity measured by fluorescence
spectrophotometer was almost proportional to the logarithm of the concentration
in the range between 10 ppb and 10 ppm. Filter paper was dyed at pH 3 with FBA
extracted at pH 9 from a recycled pulp. Fluorescence images of the dyed filter
paper were acquired with a CCD camera. The logarithmic gray level of the images
and the logarithmic concentration of the FBA solutions showed a linear relationship.
With regard to FBA removal, although alkaline treatment up to pH 13.0 did not
remove much of it, hypochlorite at 1 ppm was found to lower fluorescence intensity
from 1000 ppb to approximately 1ppb as a corresponding FBA concentration. In
the method of extracting FBA with superfluid CO2 followed by quantitative determination
by high performance liquid chromatography, FBA was extracted almost completely
in the alkaline condition in which water and organic base were added to superfluid
CO2 as modifiers.
Keywords：Fluorescence spectrophotometer, food packaging, hypochlorite, stilbene,
superfluid CO2 |
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