Development
of Large Scale Nickel-metal Hydride Battery
Kazuo Tsutsumi
Advanced Battery Project Section, Planning & Control Department,
Corporate Technology Division, Kawasaki Heavy Industries, Ltd.
Large scale nickel-metal hydride battery is developed for industrial
use as a power source and a energy storage. Nickel-metal hydride
battery can discharge at high rate and discharge most of energy
stored in the battery with long life.
When using this battery for several kind of electric power generator we can
obtain
high total generating efficiency, for example, wind power generator.
Large scale nickel-metal hydride battery has no dangerous substance, toxic metal
and welding so recycling of battery is safe and easy.
The Latest Technologies for Energy Saving
―Reduction of Energy Consumption for Pulper, Screen and Refiner
and Stock Preparation System to Contribute to Energy Reduction―
Takeshi Kanazawa
Aikawa Iron Works Co., Ltd.
In Japanese pulp and paper industry, various examinations have been
performed for the purpose of 10% of further energy-saving achievement
by 2010, which was scheduled based on the commitment at the Kyoto
International Environmental Meeting at several years ago. This paper
introduces new technologies for energy saving for pulping, refining
and screening, which are key components to achieve further power
reduction at stock preparation field, and also proposes some stock
preparation systems to contribute further energy-saving.
The Design Concept of the Saving Energy for OCC Screening System
Toshio Dousaka and Iwashige Naoyuki
Voith IHI Paper Technology Co., Ltd.
VIPT can offer the most suitable engineering for customer's needs
through the advanced technology which is integrated with VPT's. world-wide
defacto standard technology and IIM's good experience and know-how
created under the long term marketing.
This time, we wish to present a new OCC system which is focused
on energy-saving with our integrated technology. We believe, we can
present a new design concept of modern OCC system which can execute
not only the low-energy-consumption but the high-quality too.
Energy-Saving by Introduction of High Efficiency Refiner for
RGP
- Energy-Saving Examples by Low Speed Refiner -
Keisuke Irikawa
Iwanuma Mill, Nippon Paper Industries Co., Ltd.
With recent rise of market demand for environmental protection
and saving resources, Nippon Paper Industries Iwanuma Mill has
set up an environmental action plan concerning "the achievement
of sustainable society."
This mill produces 55,000t of paper mainly newsprint per month
based on this environmental action plan. Our newsprint contains
kraft pulp, recycled pulp, and mechanical pulp as main materials
resulting 75% or more of recycled pulp, 5-10% of kraft pulp (NBKP),
and the remaining is mechanical pulp which is produced on site
as RGP (Refining-GroundWood-Pulp).
Mechanical pulp, such as RGP, is pulp which needs an enormous
amount of electric power as a feature of its production. However,
power consumption was greatly reduced through repeated reconstructions,
including stock flow change and introduction of new equipment.
This report describes a series of energy-saving examples achieved
by reconstruction of RGP process.
Energy Saving with Cl & K Removal System Using Ion-Exchange
Resin
Youichi Kataoka
Niigata Mill, Hokuetsu Paper Mills, Ltd.
In the process of Kraft Chemical Recovery Cycle, Chlorine (Cl) and
Potassium (K) entering with raw-material wood chip are gradually
accumulated and concentrated during continuous operation. The plugging
issue of carryover particles and dust in the Recovery Boiler is caused
by decreasing melting temperature of dust along with increasing concentration
of Cl and K in the Black Liquor. At the same time, fouling and corrosion
at the super heater of Recovery Boiler is apprehended.
To avoid above problem, proper portion of recovered Electrical Precipitator
Ash was deserted from recovery cycle. We have investigated conventional
crystallizing method system, however, this system is required to
operate large sized freezing machine and spend huge amount of electrical
energy. Therefore, we have developed new method expected lower energy
consumption.
In this manuscript, actual operation data from Cl & K Removal
System using Ion-exchange Resin developed and installed at Niigata
Mill are introduced. As the result of operation, plugging issue at
the tube of the Super-heater was excellently decreased and large
amount of steam reduction for the Sootblower have been confirmed.
Energy Saving by Introduction of the Gas Engine Generating System
Tadashi Arifuku
Yashio Mill, Rengo Co., Ltd.
Recently, increasing the demands on environmental conservation,
Rengo has been working actively on resource and energy savings based
on
‘Eco-Challenge009’ which is our environmental target. As part of
our efforts, the Paperboard Manufacturing Department has set the
target to reduce the ratio of CO2 emission at the rate of 1% every
year.
Since Yashio Mill introduced gas engine generating system
instead of conventional and low efficiency gas boiler and steam turbine
generating system, we introduce the way and result of energy saving
by taking this system as a case.
Steam Turbin for Driving Fan of Incinerator
Masaaki Koito
Fuji Mill Oji Paperboard Co., Ltd.
Our Fuji-Plant is located in Fuji-City, the central part of Japan,
near Mt. Fuji on the north side, near Suruga Bay on the south side.
Our Plant is also a main production factory which has two sets of
NO.8・10 M/C and is a large-scale factory with the quantity of production
representing Japan.
In addition, we have a fluidized-bed type garbage incineration plant
for the waste generated at a materials process which capability is
BD40 t/day (includes waste heat boiler with max flow rate 5.7t/h).
Steam from the waste heat boiler had been controlled at constant
pressure (1.75Mpa) by the valve in drum to be used for dry process
of M/C line. This time we tried to improve to save energy by another
method. There we observed the electricity to look into the fan motor
which needs much energy in some facilities.
We present a new method as below of more effective use for steam
that 2 steam turbines are installed and connected to the FDF(110kw-2P)
motor and IDF (90kw-4P) motor to assist the power. It brought the
good effects to save energy.
This system has very superior points in that we can use the rest of steam effectively
and can save big energy under rated condition. In addition, it also has the characteristics
of easy maintenance and easy start-up.
Now although the capability of 100% cannot be demonstrated from short of rated
steam condition, we will be able to save the energy for the amount of electric
power 130kw/h equal to 10,000,000 yen if the combustion of an incinerator would
be stabilized, the amount of steam would be secured and could be run during a
year.
We are willing to try more to save energy in the near future because the increase
of the energy cost gives the large influence to the factory profit.
We would like to improve factory employee's consciousness further in the future
and to promote the energy-saving activities.
Energy Saving Project by Renovation of Stock Preparation System
Hidetsugu Ueda and Seiji Tomita
Nippon Daishowa Paperboard Kanto Co., Ltd.
Nippon Daishowa Paperboard Kanto (NDB Kanto) Co., Ltd., Soka Mill,
has completed modification project of the existing OCC recycling
system for the purpose of the power saving.
As result of reconstruction of the production map in NDB's four
production companies, No.1 Paper Machine in Soka Mill has been changed
to produce
the corrugating medium only.
In this paper, two topics are presented in connection with the above
modification;
1) Field test report of newly developed Low Power (LP) Screen of
which trial was carried out jointly with the screen manufacturing
company.
2) At the same time that LP Screen has been adopted in the existing
OCC line, not only the current MF (Multi Function) Screen has
been relocated but also the other fine screens have been modified
to the
bar basket type, and as the result, the extensive energy saving has
been achieved.
Recent Paper Dryer Enclosed Hood
- High Dew Point Enclosed Hood and Machine Room Ventilation System
-
Haruo Tanaka
SHIRATORI ENGINEERING CO., LTD.
Pulp and paper industries are the typical industry of plenty energy
consumption type. Therefore, every paper mills have been endeavoring
all efforts for the higher efficiencies in production, energy saving
in all processes as well as high yields and waste paper recycles
etc.
However, the more severe energy managements have been required owing
to the high speed production under the broaden width of paper by
giant paper machines.
Simultaneously, the long-life renovation of main machine and environmental
improvement in machine room shall be considered according to the
recent change of operation condition.
Siratori have been endeavoring to cultivate new technologies and
know-how based on many delivery results regarding High Dew Point
Enclosed Hood and Environment Improvement System by Machine Room
Ventilation System.
Advanced Press Felt Management for Improved Quality and Paper
Machine Performance
Hideomi Uchikawa
Voith Paper Automation Japan Ltd.
Raymond P. Shead
Voith Paper Automation GmbH & Co. KG
This paper describes a new press felt measurement system that is
designed to assist the papermaker optimise the press section set-up
and its routine operations.
The measurement provides both profile and trend information for
water weight, permeability and temperature of the individual felts.
By
combining this information with moisture measurement directly following
the press section, it can help improve product quality, felt performance
and process efficiency while reducing the energy consumption of the
pressing and drying operations.
Treatment Capacity of Rotary Press Filter
-Result of Operational Research on Actual Facilities-
Koji Matsumoto
Application Development Section Process Engineering Department Machinery & Equipment
Division, TOMOE ENGINEERING CO., LTD.
Several years have passed since the Rotary Press Filter was first
introduced to Japan and Tomoe Engineering started its production
and sales, and its high dewaterability has been proved through test
data of various materials. Further, the Rotary Press Filter has features
superior to other dewatering machines such as simple structure, space
saving, low power and less washing water requirement, besides dewaterability.
Number of installation of the Rotary Press Filter is increasing year
by year and we have installed 5 units for papermaking wastewater
and 27 units for other kinds of applications in Japan. We expect
its number will increase further.
In this report I will introduce a result of research made for about
a month on the treatment capacity of the Rotary Press Filter in operation
at papermaking company “A.” I will also introduce a result of research
on changes of the feed sludge condition and cake moisture for two
days during the one-month research period. This is the first time
to release the dewatering data of papermaking wastewater sludge obtained
at the actual facilities.
Application of SAQR to Modified Cooking Processes (PARTⅡ)
Junji Tanaka
Kawasaki Kasei Chemicals Ltd.
SAQR has been used as a cooking additive in many KP mills. This
process is known as “Quinone Cooking”. In order to apply SAQ to recent
modified
cooking process, more effective condition for SAQ is investigated.
The following results have become clear with the small digester developed
by KKC in which addition and extraction of cooking liquors are possible.
1) SAQ’s effect in each combination of penetrating conditions (alkali
concentration, temperature, and time) was observed as the same
as in conventional one (non-separating liquors). Also SAQ will possibly
be more effective than in conventional process under some combinations
of the penetrating conditions.
2) SAQ penetrated enough into chip even at low temperature and short
time. Most amount of SAQ remained in chip after black liquor was
extracted from the digester. But dispersed anthraquinone was extracted
more than SAQ into black liquor.
Production Methods of High Viscosity Kenaf Bast Pulp for Papermaking
Wiwin Suwinarti, Yu Wang and Kazuhiko Sameshima
Faculty of Agriculture, Kochi University
Zhou Cheng
School of Life Science and Technology, Tongji University (Shanghai)
Kenaf bast fiber was treated successively by ammonium oxalate, sodium hydroxide
and sodium chlorite at different order and conditions in three methods, A, B
and C (Table 1). The characteristics of pulp and paper were determined by various
methods including TAPPI test methods. The Kenaf-B, derived from the method B,
showed the longest fiber length as length weighted average which confirmed that
this treatment is the best preparation method for fiber length measurement. However,
the viscosity and the paper strength properties of Kenaf-A was the highest if
compared to the other two methods. Comparison of the viscosity and the strength
properties with other pulps (commercial kenaf bast and wood pulps) indicated
that all the three methods have superior properties but the Kenaf-A is the best
pulp so far.
Keywords: kenaf, bast fiber, viscosity, fiber length, paper strength
|