|2009 July JAPAN TAPPI JOURNAL
Vol.63 No.7 Abstracts
Report on Results of Follow-up Survey on JPAfs Committed Action Plan for FY 2007 and Efforts against Climate Change in the Japanese Pulp and Paper Industry
Japan Paper Association
The Japan Paper Association (JPA) has been actively working to save energy since 1997 when it established its gCommitted Action Plan on Environmenth. JPA declares its policy of restraining CO2 emissions in the action plan, and is working toward the following targets revised in September 2007:
EOn a five-year average basis from fiscal 2008 to fiscal 2012, reduce fossil energy consumption
per unit and fossil energy derived CO2 emission per unit by 20% and 16% from the level of fiscal
EBy fiscal 2012, expand forest plantation area owned or managed by the industry at home and
abroad to 700 thousand hectares.
Since fiscal year 1990, JPA has made a survey on the actual results of energy consumption in the year, published its results compared with that in fiscal year 1990. This report shows the results for fiscal year 2007, as well as energy consumption, CO2 emissions and the position of the pulp and paper industry in Japan, and information related to Kyoto Protocol such as trial implementation of emission trading.
Development of High Efficiency Heat Pump Modular Chiller and Example
Toshiba Carrier Corporation
Promoting a high efficient electrical heat pump chiller in substitution for cool and hot water supply with fossil fuel can contribute to the reduction of CO2 emissions, and can contribute greatly as the measures against global warming. We developed the high efficiency large capacity heat pump chilling unit using high-efficient refrigerant R410A by the name of gSuper Flex Modular Chillerh. This product is consisted of some 30/45USRT modules with X-frame chassis, which was created from study of air-flow analysis data. The optimized air distribution allows eside by sidef installation without deteriorating the chillerfs performance. The module can be combined from 3 to 12 modules. As a result, the unit capacity range can be expanded from 90USRT to 540USRT. The main features are energy saving and reduction of carbon dioxide emissions by the high part load efficiency.
Energy Saving with Lighting Lamp and Shade
Technology Div., Oji Paper Co., Ltd.
Generally the mercury-arc lamp is used for the lighting of a paper machine building. We replaced this by the ceramic metal halide lamp and the lamp shade of high efficiency reflector. As a result, the large amount of the electric power used was reduced, maintaining illumination conventionally. By replacing 4000 sets of lights at ten mills, it became 860kW power saving and 7 million-kWh electric energy per year was reduced.
Integration of Real-time Energy Conservation Monitoring
Pulp & Paper Account Sales Dept., Yokogawa Electric Corporation
The energy conservation environmental solution at which Yokogawa Electric Corporation, aims achieves three elements of energy conservation based on the experience and the knowhow of "Measurement", "Control", and "Information" that is our center technology. That is, the usage condition of "Show it": energy is measured to the truth and it expresses it numerically. "Analyze it": the uselessness of energy is analyzed, informationized based on the data expressed numerically, and it makes it to visible. And, it is in "Solve it": informationization and the control and the reduction of the uselessness of the energy made visible.
This time, the balance of production and the electric power demand is in real time understood by the proposal. It proposed the solution of the energy management system for the achievement of Integration of Real-time Energy Conservation Monitoring in the paper mill. The energy balance of the plant was considered.
Energy Saving in the Activated Sludge Process
Yashio Mill, Rengo Co., Ltd.
In order to meet increasing social demands on environmental conservation, Rengo engages in resource and energy saving activities under gEco Challenge 009h, the document setting forth the environmental vision of the company. Under the vision, the company targets to reduce 22% of CO2 emissions from the 1990 level by year 2009. As part of the company-wide effort, Yashio Mill has focused on energy saving in activated sludge process. The outline and details will be introduced below.
Improvement of Heavy Oil Consumption in No.1 Lime Mud Kiln
Asahikawa Mill, Nippon Paper Industries Co., Ltd.
Asahikawa Mill of Nippon Paper Industries is located at almost the center of Hokkaido. Asahikawa area had several advantages for the pulp & paper business. It was easy to collect rich wood logs, wood chips and used papers from various place in Hokkaido and to use enough water from Ishikari river. Therefore the mill was established at that area in June 1938.
Our time-honoured tradition and profound technology make the Asahikawa millfs products reputed in the market. Among the products there are lightweight coated paper, fine paper, communication paper, base paper of cupper clad laminated board, wall paper base and so on. The Asahikawa mill introduced environmental management system and achieved ISO 14001 certification in June of 1999, and we have positively used local resources, are always paying attention to the environmental program, based on Nippon paper groupfs charter@on the Environment.
In Asahikawa mill, we produce mainly KP, and use the black liquor for recollection of heat and White liquor. On the other hand, after the biomass boiler is started from 2008, the ratio of oil consumption is almost in lime mud kiln. In this report, I describe about the reduction of energy consumption in causticizing process, and the improvement of Heavy oil consumption in No.1 Lime Mud Kiln.
A New Development of PAM Based Micro-particle Polymer Dispersion
Research and Development Department, Paper Chemicals Division,
Arakawa Chemical Industries, Ltd.
From environmental protection point of view, use of recycled fibre has been increasing in Japanese paper and paperboard industry. Demand of used paper has been increasing not only in domestic but also overseas. Quality of recycled fibre which has been used in domestic is getting lower and papermaking condition has become worse. Even in such severe condition, paper chemicals i.e. sizing agent, paper strength agent have to work effectively.
In this report, newly developed PAM based polymer which will keep high coagulation force and will give final paper strong dry strength is described. New type PAM based polymer make it possible to obtain good results under severe condition. This new polymer agent is not aqueous solution but it is high molar weight polymer dispersion. Higher level of paper strength is achieved when the new type polymer is added in wet-end, and one-pass retention of fibre and sizing efficiency are also encouraged.
Ekafs Compozil Fx System for High Speed Fine Paper Machines
David Lovell, Marek Gorzynski, Christian Przybyla, Yoshikazu Sonehara and ShigeharuHarakawa
Eka Chemicals, Asia Pacific
The Compozil Fx system was developed to meet the new customer demands of modern fine paper making. These include machine speeds in excess of 1,500 mpm, target ash contents in excess of 30%, increasing use of recycled fibres, achieving stable retention with excessive dewatering and the retention of more challenging fillers. The Compozil Fx components are added and controlled to achieve agreed specific customer goals.
A key advantage of Compozil Fx is the ability to gdecoupleh the retention and dewatering characteristics of traditional systems, thus providing the optimum balance between retention, dewatering and formation. This in turn has allowed the customers to enjoy cost efficient, stable retention at paper high ash and high machine speed conditions, leading to stable machine runnability optimum sheet quality. The ability of Compozil Fx to do this has allowed it to become the system of choice for modern fine paper machines in Asia/Pacific.
Innovatively Optical Surface Roughness Tester gOpTiSurfh
-Evaluation of the Paper by the Measuring Equipment and the Analysis Programs-
Customer Service, NOMURA SHOJI CO., LTD.
The OpTiSurf revolutionizes the measurement of surface roughness of paper! Using@advanced optics and algorithms, it quickly quantifies the optical roughness of entire sheets.
The surface roughness of most paper grades is an important property. Roughness strongly influences the sensation of handling the paper, which can have complex effects on the subjective assessment of quality, depending on the type of paper and its application. Roughness has a direct effect on print quality for most printing technologies, and it is often related to other physical properties of practical significance such as friction or glue adhesion. The surface roughness is typically determined by air leak methods. These methods are time consuming and can lack adequate precision. The OpTiSurf offers a fast, repeatable, objective instrumental determination of surface roughness of paper.
The OpTiSurf was developed by Amcor Research & Technology under the auspices of Australian Paper.
Power Saving and Improvement in Fiber Recovery, for Screening Stage
-MaxFlow-0, 1, 2, MaxSaver and GHC-Rotor-
Kazumi Fujita and Okumura Junhiko
Technical Department, AIKAWA IRON WORKS CO., LTD.
The MaxFlow Screen family, MaxFlow-0, 1, 2, MaxSaver is the newest AIKAWA standard outward screen series. MaxFlow family is adopted in all kind of paper stock preparation systems as the coarse & fine screen, as main & reject treating screen, as the hole & slot screening stages. The unique structure of MaxFlow screen body, equipped with NW Super-2 screen cylinder & Gladiator HC (GHC) rotor, produces superior low power consumption and high fiber recovery efficiency. In this report, AIKAWA presents the introduction of MaxFlow family and the case study of application merits of them.
Energy Saving by gIntensa Pulperh of Stock Preparation System
Stock Preparation Engineering Dept., VOITH IHI Paper Technology Co., Ltd.
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 (VPIT) 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 VPIT 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.
A New Pitch Control Agent for Press Felt
Development Group, Maintech Paper Tech Co., Ltd.
Recycled pulp usage and neutral papermaking, closed system tend to increase in recent years. This tendency causes serious pitch troubles at wet-end such as deterioration of paper quality and decrease of productivity due to frequent down time for M/C cleaning.
Maintech has developed a spot prevention program, a total solution that passivates all surfaces in the paper machine where the deposition could increase spots. Mills can take considerable advantage of this program. Our technology of wet-end deposit control, a continuous application of chemical additives (Polymer based agent, MAINTECLEANTM) directly to press felts / felt rolls removes deposit well and establishes a protective coating that prevents deposit buildup. Elimination of deposits in the press felt increases not only paper quality but also productivity.
This report describes an effective solution agent for press felt deposition.
Research on Ink Peeling-off of High Gloss Coated Paper
Takehiro Yoshimatsu, Masayuki Kawasaki, Daisuke Sakakibara and Fuminari Nonomura
Pulp and Paper Research Laboratory, Nippon Paper Industries Co., Ltd.
The ink peeling-off can be caused when high gloss coated paper is printed by web-fed offset press. At the bookbinding process, the printed area come into contact and rub against each other under the pressure. This is a serious printing problem because the small dots where ink was peeled off will become the white dots on printed area. This phenomenon is quite different from the ink rubbing that occur on matte coated paper. The purpose of this research is to investigate the ink peeling-off generation mechanism. The following properties were evaluated, morphology of paper surface with the scanning electron microscope, micro-order roughness at the pigment's particle with the optical interference type microscope, and the ink dryness on paper surface etc. As a result, it was concluded that the ink peeling-off is generated easily when micro-order roughness is fine and the penetration rate of ink is slow because anchoring effect of ink vehicle into coated paper is thought to be weaken.
Keywords: ink peeling-off, high gloss, micro-order roughness, ink dryness