2013 July JAPAN TAPPI JOURNAL
 
2013 July JAPAN TAPPI JOURNAL

Vol.67, No.7 Abstracts


Mechanism of the Feed in Tariff Scheme

Masato Yasuda
New and Renewable Energy Division, Agency for Natural Resources and Energy, Ministry of Economy, Trade and Industry

  In our country which is a resource-poor country, face large introductory expansion of renewable energy against the background of rapid increase of the energy demand by newly emerging country, and the correspondence to a global warming.
  Japan started feed-in tariff scheme in July, 2012. Under the feed-in tariff scheme, if a renewable energy producer requests an electric utility to sign a contract to purchase electricity at a fixed price and for a fixed period guaranteed by the government, the electric utility is obligated to accept this request.


Introduction of Energy-Saving Technology in the Industrial Thermal Power Plants

Toshi Ishimura
Power Systems Service Business Department Power Systems Headquarters
MITSUBISHI HEAVY INDUSTRIES, LTD.

  Due to the background of recent social situation, it is considered that thermal power plants recently play an important role in stabilizing electricity supply. Thermal power plants, of course, use fossil fuels such as coal, LNG and petroleum which are almost all imported to Japan. The cost of fossil fuels is the most important problem in industries. This paper outlines energy saving technology so that the fuel cost will be reduced through various countermeasures.


Energy Saving for Approach System

Toshio Dousaka
Paper Machine Eng. Dept., Voith IHI Paper Technology Co., Ltd.

  In recent paper industry situation, to enhance the production efficiency is one of the most important issues. Especially energy saving is the essential part of the production efficiency. The quality of waste paper, however, is getting worse for decades, and customersfdemand of to keep or get better quality is increasing. Our technological development has been for their answer. For example, LP screen acquire dramatic energy saving and best screening efficiency, and IP pulper also get much better defibering efficiency with much less energy consumption. Both products perform their ability not only at their part but also in the whole system. This new concept will supply the solution of the paper industry, and we strongly believe it will be new standard in the future.
  Both products as LP screen and IP pulper are for stock preparation system. Our technology also covers approach flow system, and have some solutions for the energy saving. For this article, our state-of-the-art technology will be introduced especially about stock mixing, low consistency cleaner, and approach screen.


Activities for Energy Saving in Team Teinenpi Yashio

Masahiro Shishido
Yashio Mill, Rengo Co., Ltd.

  Rengo Co., Ltd. has set an environmental target aiming to reduce 32% of the corporate CO2 emission by 2020 compared to the 1990 base, followed by a higher objective of 50% reduction by 2050. From early on, Yashio Mill has been working on environmental load reduction including the fuel conversion from heavy oil C to natural gas, utilization of paper sludge as biomass fuel, and installation of high-efficiency equipment in the whole process.
  Incidentally, a stricter local regulation has been in effect since 2011 in Saitama Prefecture where the mill is located, which requires us to reduce 15% of the CO2 emission during 2015 and 2019 relative to the average value from 2001 to 2004.
  Under these circumstances, Yashio Mill launched a new energy-saving project team in March 2011 composed of members from various sections. With the aid of an external energy-saving consultant firm, the team named gTNP (meaning low-fuel consumption) Yashioh expands cross-sectional activities for further CO2 reduction.


Analysis of Energy Data toward the Optimizing Use of Energy

Yoshinori Urasawa
Energy Consulting Section Energy Consulting Dept. VPS Innovation Div., Yokogawa Electric Corporation
Kensaku Kawamura
Pulp•Paper Engineering Gr. Account Sales Dept. Ⅰ Sales Div.Ⅱ., Yokogawa Electric Corporation

  In Pulp and Paper industries, the cost of raw materials and energy will have major impact on the product prices.
  For this reason, efforts such as energy-saving, plant optimization, high production rate improvement, are now being made to keep and increase profits.
  Moreover, the designated energy management mill has fulfilled reducing the energy consumption rate at least 1% every year constantly. Efforts for energy reducing consumption are very important object in the mill.
  It starts with current status analysis and realizes improving points.
  To identify them, we need to analyze some manufacturing data and energy data. Here is our approach for the identification.


Efficient Application and Visualization of the Compressed Air

Noriyuki Mukaida
Gifu Mill, Oji Materia Co., Ltd.

  Oji Materia Co., Ltd. had addressed the improvement for a purpose of efficient operation of compressors as part of energy saving project since 2009. The Project had been proceeded in 2 stages, as 1st stage we carried out the investigation of air leak and improvement in order to reduce the loss of air consumption, and succeeded to save the amount of air volume to 500,000Nm3/year.
  We had achieved the introduction of visual inspection for power, pressure, blow and unify how many units are suitable for this mill by console made by MIWA Inc.
  As a result of taking actions above, we had neduced not only basic wit of air 0.144kW/Nm3 to 0.104kW/ Nm3 but also power consumption 2.8MkW/year to 1.6MkW/year.
  This result shows we have adviced 40% cost reduction as an environment effects.
  In the meantime,
  - To install the pressure monitoring alarm system,
  Trend supervisions of air pressure, flow rate, power consumption
  - To check the basic unit of air,
  These operation gave a benefit below and we can find the facility abnormal promptly.
  Abnormal situation of facility will be able to be recognized promptly.
  As a 2nd stage, we had archived the optimized low pressure from 0.65MPa to 0.53MPa gives 130,000 kW/year cost merit.
  Also in order to reduce the air consumption, we thought about purchasing devices to save energy in air blow line.


Energy Saving Solution for Paper Machine

Hidekatsu Sakurai
Paper Business Line, Metso Paper Japan Co., Ltd.

  In addition to the raise of energy cost across the world, power shortage originally caused by the Great East Japan Earthquake in March 2011 has been squeezing earnings of paper making companies. As a result energy efficiency is expanding its influence in operational efficiency of paper and board making.
  Metso has been seeking the possibilities to reduce energy cost, which generally accounts for 15-30% of total production cost and has continued making efforts for the realization. We believe that it is still possible to gain more energy saving in electric and steam consumption.
  Metso's new paper making concept, OptiConcept M uses effective equipment to reduce the consumption of electricity and steam. This article introduces promising equipment and solutions that can be applied to existing paper machines to save energy.


Introduction of Latest DD®6000 Refiner
- Energy Saving by Highly Efficient Refining -

Yoshinori Ishikawa
Design Department, Kawanoe Zoki Co., Ltd.

  GL&V/Kawanoe Zokifs latest double disc refiner gDD6000hachieves highly efficient refining by Equa-FloTM technology,one of the spline technology. Kawanoe Zoki has proposed to upgrade existing DDR with the Equa-FloTM technology, and high energy saving performance was successfully completed in the result.
  DD6000 performs energy saving by 40% and capacity increase up to 50% compared with conventional refiner DD4000.
  Above high performance is accomplished by its unique technologies. The Equa-FloTM technology is the only technology that has ports in the hub rather than in the rotor. This eliminates all forces on the rotor and results in the most balanced centering rotor. One high performance refiner plate has no area for bolts in refining area and this leads to more efficient refining performance. The other high performance refiner plate has zero degree draft and results in keeping constant refining performance throughout plate life time. Tangential inlet and outlet increase refiner capacity and tangential inlet saves energy consumption as well.
  DD6000 would be one of the best solutions to save energy and reduce operating cost for your stock preparation system.


Magnus Simulation: Proposing the Optimal Refiner Plate for Each Applications
LemaxX Spiral | Nature Applied

Andritz K.K.
Kenichi Itoh
Andritz Inc.
Peter Antensteiner

  Andritz is a leading supplier of refining technology in the world. Also Andritz supply wear parts for refining process. Andritz has 15,000 patterns or more of refiner plates and several new patterns developing every week. Also Andritz developed and upgraded a simulation program gMAGNUSh. It is simulated the gNature of Refiningh theory. By using this program, Andritz developed the logarithmic Spiral Design refiner plates gLemaxX Spiralh. The following description introduces the latest performance of gLemaxX Spiral h technology.


Screw Type Steam Compressor for Energy Saving and CO2 Reduction
- Saving Boiler Fuel by Compress Flash Steam and Reproduce Steam High Efficiently -

Toyoshi  Kaito
Energy System Department Machinery • IT Division, Shinsho Corporation

  Brand Name gSteam Starh has been developed as steam energy saving equipment since Kobe Steel Ltd. started business with screw type steam generator unit in 2007. On this paper we introduce New product gMicro Steam Recovery Compressor(MSRC)h, which has the remarkable feature of high efficiency, wide range etc.


Issues and Solutions for Light Weighting on Paperboard

Yasuhide Yoshimoto and Kazuhide Yoshikawa
Paper Chemicals Development Section, Research & Development Center, Researh & Development Co.,Harima Chemicals, Inc.

  In recent paper & paperboard industry, we focus on high efficient production, the technologies for saving resource, and saving energy to use energy effectively for environment on the earth. Regarding to paperboard making, there are some trends such as machine speed up to improve productivity, increasing calcium carbonate due to using magazine recycle-fiber, and closed papermaking system in corresponding to waste water for environmental issues. These trends cause lower retention of fibers and internal additives, decreasing of fiber strength by itself, scaling, and increasing electrical conductivity, temperature and chemicals dosage (per unit). In addition, the light-weighting is progressive for resolving environmental issues with saving resourcing. However, it is getting difficult to keep strength properties such as compression and burst strengths at the papermaking with conventional internal additives because compression and burst strengths depend on basis weight. We have suggested the total wet end system, total chemicals on wet end process with alum performance for quality improvement, and surface treatment with coating additives for the light-weighting at the annual meeting of 2005 and 2010. In this report, we introduce our technologies such as internal dry strength agent (PAM) and surface treatment with coating PAM, in addition to developed coating PAM and coating agent for cracking problems during creasing, on the issues and solutions for light-weighting on paperboard.


Corporate Profile & Product Information (3)
MIURA Co., Ltd.

  The history of Miura began with the development of the Z boiler in 1959.
  Our motto states,hMiura airms to be your best partner for energy, water and environment with our Tecno-service Revolutionh. Our competence is grounded in the expertise gaind as the market leader for small onse-throuth boilers in Japan.
  Miura provides new products and services that satisfy the requirements of customers in the fields of heats energy, water treatment, and environmental solutions.
  Today, as the leader in the fields of energy, water, and the environment, we aim to grow into a trusted global company.
  Tecno-service means: To become the most respected and trusted name with cutting edge service and technology.


Development of High Quality Porous Fillers (Part3)
- Scale-Up Trials at Pilot and Mill Plant for High Quality Porous Fillers -

  Precipitating silica which is also called porous fillers has a low specific gravity and has frequently been used as a filler to increase paper bulkiness. Uses of porous fillers do not cause problems such as discoloration which occur with machine pulps and staining paper machines which often occur when using fatty acid derivative and special surface-active agents as a bulking agent. Rather, they are advantageous in terms of cost such as that they reduce the drying load of paper machines by decreasing the amount of pulp to be used and decreasing the amount of pulp while maintaining the same paper thickness. However, they still have a problem of degrading paper strength. Therefore, we explored ways to develop high quality porous fillers which have high paper-bulking properties and great opacity. In the last report, we reported that having alkaline-resistant microparticles available during reactions enabled a control of primary particle diameter, secondary coagulation particle diameter, and particle size distributions which were particle properties, resulting in high quality porous fillers with a low level of paper strength degradation.
  In this report, we studied a scale-up of this process and achieved low level of paper strength degradation with controlled particle properties in an industry level.


Synthesis of a Functional Clay Mineral from Paper Sludge Ash (PS ash) and Its Ability
of Removal for Dye

Satoru Fukugaichi
Ehime Institute of Industrial Technology

  A functional clay mineral (Layered Double Hydroxide: LDH), whose main components were calcium and aluminum, was prepared by a co-precipitation method at 30 degree from PS ash. The resulting materials were investigated by XRD, SEM, EDX, TG-DTA and N2 adsorption observation and were used to remove an anionic dye (Remazol Violet 5R) from an aqueous solution at 30 degree. Adsorption isotherms showed convex upward and the adsorption data were fitted to Langmuir equation. LDH(8) ,which was synthesized under the condition of Ca/Al molar ratio=8, shows maximum adsorption ability of an anionic dye.