2012N6  pZ
 
2012 June JAPAN TAPPI JOURNAL

Vol.66, No.6 Abstracts


Solar Control Film
-Energy Efficiency Measures of Window Aperture-

Koichi Suzuki
LINTEC Corporation

  Due to the global warming occurring today, reduction of the greenhouse effect gas is crucial matter. Because of the operation of the revision for Rationalization in Energy Use Law filed in 2008, not only factory / office but also the company / the franchise chain such as convenience store starts to be subject to rigid control and required to reduce greenhouse effect gas by 1% per year. As a method of energy conservation, companies try to renew the air-conditioning equipment, install LED light / the photovoltaic facility. However, there is not much progress we can see today for energy conservation for architectural window application. By installing solar control film, it is possible to block the solar radiation heat and reduce CO2, achieving excellent effect in relatively short-term, by low cost. As the solar control film reduce 35% up to 85% of solar radiation heat, cooling performance can be improved. This report illustrates the detail of the performance and features about the solar control films.


Advanced Aeroderivative Gas Turbine

Tohru Shibanumao
Project Depr. Power System Div. Power System Operations IHI Corporation

  Aeroderivative gas turbines possess certain technical features inherent in their design heritage, offering significant operational and economic advantages to the user.
  This paper presents an overall description of feature of them and representative aeroderivative gas turbine LM2500 and LM6000 series. It also describes the latest DLE combustor and water spray inter-cooled system for power enhancement in hot condition.

Activities for Energy Saving in Kasugai Mill, Oji Paper Co., Ltd.

Keiichi Furikado
Kasugai Mill, Oji Paper Co., Ltd

  At the Kasugai mill, the organization for promoting energy-saving was reconstructed and the method of saving energy has been improved from structure. This aims at continuing and advancing energy-saving.
  It was inefficient although each section was advancing energy-saving independently till 2009. From September, 2009, the project team (six of eight members devote themselves) was established as extraordinary organization. This promoted energy saving by every place of the mill. The consulting company which makes energy-saving the speciality was utilized in 2010.   We learned the enforcement method of new energy-saving from them. Since the method of our energy-saving had improved, the project team was ended. From April, 2011, the organization for energy-saving was newly founded. This is mainly constituted by the operation section.
  Activity of the team is taken over to this organization now. This organization extends the range of activity to the whole mill, and is promoting energy-saving powerfully.

Automatic Tension Stretcher

-Reducing Steam Quantity and Improving Production Efficiency by Automatic Tension Stretcher -

Kazuki Hasegawa
KGK Engineering Corp.

  Keen competition, falling price and increased energy costs make it more necessary than ever
to optimize all production processes. Now, almost Japanese paper mills are using the air cylinder to control of canvas tension. In case of the air cylinder, it cannot get the most suitable dry efficiency, because it is quite difficult for the air cylinder to control of canvas tension precisely. The amount of energy consumed in dryers is enormous. Automatic tension control is positively influence production efficiency, paper quality and manufacturing costs.


Introduction of Photovoltaic Power Generating System (1535kW) at Fukushima Yabuki Plant

Satoshi Mochizuki
Rengo Co.,Ltd.

  Rengo Co., Ltd. has continued to work on environmental protection activities on a company-wide basis. Rengo recognizes that eco-friendly management is an essential for sustainable development of company.
  We first installed a 400 kW photovoltaic power generating system at the Shin-Kyoto Plant in 2007. In 2010, we introduced a mega solar power generation system at the newly constructed Fukushima-Yabuki Plant. The system is designed to provide all the day-time electricity needs of this eco-friendly plant. Here we will introduce the state of installation of the photovoltaic power generating system and our challenges for the future.


Power Saving by LED Lighting
- Issues and Solutions -

Akitoshi Komiya
LED Business headquarters, TOSHIBA Lighting & Technology Corporation

  Recently, LED devices have become to emit white light efficiently, so, the LED lighting is used for power saving. Incandescent lamps are replaced with Self-ballasted LED lamps, but there are various problems to replace fluorescent lamps with tubular LED lamps. In this article, problems and solutions on LED lighting are expressed.


Energy Saving Case Studies of High Efficiency Slurry Pumps and New Progressing Cavity Pump with Direct Drive Technology

Tatsuo Tsuzuyama and Kazuyoshi Koike
Pump Design Department, Oyama Works, Furukawa Industrial Machinery Systems Co., Ltd.

  Energy saving activity has been obliged to suppress global warming and to reduce carbon dioxide emissions, and improvement of pump efficiency is effective because total energy consumption by pumps is very large. Centrifugal slurry pumps are used in pulp and paper mills to deliver high viscosity fluid and corrosive slurry including abrasive solid particles, and the slurry pump efficiency should be improved. We have developed a new series of high efficiency slurry pumps. Some results of field tests for the high efficiency slurry pumps are reported in this paper.
  On the other hand, a new progressing cavity pump is introduced in this paper. The new pump has a unique mechanism to drive an eccentric screwed rotor without universal joints used in traditional progressing cavity pumps. The pump size is very small compared to traditional one, and it has great performance to deliver very high viscosity fluid in high pressure.


Development of Light Materials for Planting Using Paper Sludge

Yasuaki Komiya
University of the Ryukyus
Yoshihiro Tokashiki
The NPO Corporation of China-Japan Resources and Development Association
Hiroyuki Tanaka
Chuetsu Pulp & Paper Co., Ltd.
Hideo Shiroma
Showa Paper Industry Co., Ltd.

  The paper sludge has been treated as industrial waste in the final landfill site in Japan, although it is often incinerated, and the incinerated ash is used to a raw material of cement. Whenever the paper sludge is incinerating, CO2 is exhausted from both the combustion of the pulp and the pyrolysis of calcium carbonate. Since the pulp is a biomass, the CO2 exhausted from them are not counted because they are accounting to the carbon neutral. If the sludge is not incinerated, CO2 from calcium carbonate and the pulp would not return into the atmosphere. This act might be evaluated as a carbon sink (CO2 sink), if the carbon from the pulp in the sludge has kept in the sphere of ground for a long time.
  We are studying the vailable usages of the paper sludge, which are such as gardening, rooftop gardening, and the plant factories. We think these usages are best for the paper sludge, from the viewpoint of global warming prevention. In this lecture, it reports on the outline.


Studies on Retention Behavior of Filler and Pigment in Sheets at the Wet End by Aluminum Sulfate Addition

Kenji Misumi
Okayama plant, National Printing Bureau
Takashi Okuda
Research Institute, National Printing Bureau
Akira Isogai
Department of Biomaterial Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo

  The effects of addition levels of aluminum sulfate to paper stock on retentions of TiO2 filler or red pigment (α-Fe2O3) in handsheets were investigated. The addition levels of aluminum sulfate to the blank and TiO2 filler- or red pigment-containing pulp slurries were set to 0-3% based on dry weight of the pulp, and retention ratios of Ti, Fe and Al originating from the filler, red pigment and aluminum sulfated added, respectively, were determined for the handsheets by inductively-coupled plasma emission spectrometry. Retention ratios of both TiO2 filler and red pigment in sheets increased with aluminum sulfate added; aluminum sulfate behaves as a retention aid for both these filler and pigment. However, retention mechanism and distribution of the additives in the sheets were different between the TiO2 filler- and red pigment-containing handsheets. The amounts of Al retained in sheets, zeta-potentials of pulp fibers in the slurries and SEM images of the handsheet surfaces were studies for fines-containing and fines-free pulps in terms of the addition level of aluminum sulfate. The zeta-potential of the original TiO2 filler was -41 mV, which was close to the pulp fiber used. However, the red pigment had a zeta-potential of -1.1 mV, and the zeta-potential distribution indicated that each red pigment particle had both positive and negative surface charge sites. This difference in zeta potential between the TiO2 filler and red pigment caused the different retention behavior, retention mechanism and distribution of these additives in the sheets. The obtained results show that fines fraction in beaten pulp plays a significant role in filler and pigment retentions in sheets at the wet-end.