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2009 March JAPAN TAPPI JOURNAL


Vol.63 No.3 Abstracts



The Trend of Industrial Instruments to Open Network Architecture
-FDT/DTM for Intelligent Device Integration-

Shinji Fukui
FDT Group Japan (OMRON Corporation)

  Plant System has been constructed with various types of field network for many years and now devices that are connected with field networks becomes very intelligent. This contributes higher functionality and performance of the plant system. On the other hand, there is a great demand for improvement asset management in plant system. DT/DTM (Field Device Tool/Device Type Manager) was developed as an open technology to solve these issues, and now standardized as IEC62453-1. FDT/DTM is not dependant on any specific type of field networks. FDT/DTM is also provides much higher functions than device description languages such as EDDL. This paper explains the technology of FDT/DTM and its solution and history of development.


The Introduction and Application of Latest IT Technology in Site Business
-Field Innovation at Maintenance & Inspection Field-

Hiroshi Kihara
Public Sector System Dept. II, Public Enterprise System Unit, Fujitsu Kansai Systems Ltd.

  Recently, the security and safety of site workers are urged in various industries and fields. However, introduction of IT itself is behind in the severe environment. Manufacturers also cannot provide such practical products despite the needs for the security and safety. Under such circumstances, we developed and launched the solution product with latest IT technology, gField assist toolh in May 2007, due to provide the security and safety to the site workers.
  Firstly, functions were seeds-oriented and developed to the needs-oriented finally with many customers' support and cooperation. Consequently, we achieved to complete the only safe and secure IT solution product in Japan at present.
  As a big feature of this tool, adopting the wearable terminal equipment for the site worker, the portability of the terminal was improved. Moreover, as a software feature, the communication function for the site worker support and the voice recognition function for easy operation are installed. Those functions which highly needed by customers were selected from a number of candidates.
  This paper describes the introduction of the background along the way of the product development and the functional overview, including the usage of this tool and the roadmap.


Possibility of Machine Vision in the Pulp and Paper Industry

Norihiro Nanko and Takuya Okumura
Cognex K. K.

  The pulp and paper industry is thought to be one of the industries to which the automation is the most advanced. However, still fewer than another industry when seeing from the viewpoint of introduction of the machine vision system is current states.
  Here, it introduces what kind of thing can you able to do in the pulp and paper industry, and where it is by introducing the machine vision system the possibility of the improvement of the site based on In-Sight and Checker that is our machine vision.


The Operating Experience of Integrated Network System for PM N10 in Mishima Mill

Junichi Suzuki
Mishima Mill, Daio Paper Corporation

  DCS and QCS have been the primary systems for labor-saving and quality control system in paper production automation over the last 30 years. But as needs have arisen, peripheral support systems (like ITV, PBX, paging, etc.) have had to be retro-fitted into production sites to maintain or improve production quality and control. Last year our PM N10 machine for coated paper and LWC went online at our Mishima Mill in Ehime, Japan. With this site, we planned from
  day one to improve the flexibility of the system by allowing for seamless integration of such support systems into the main network control grid through the use of goff-the-shelfh technology like high-speed LANs, sophisticated webcams, and VoIP technology.
  The integrated system consists of ITV, PBX, and a paging system along with three mobile DCS systems. Our goal was to see noticeable improvements in operating efficiency and labor requirements due to this interoperability among control and support systems. In this article we offer our evaluation of this integrated network after its first year of operation.


The Introduction of the Safety Support System

Yutaka Yokoyama and Katsushi Furui Gifu Mill, Oji Paperboard Co., Ltd.

  The DCS of The Ena factory was renewed to "CENTUM CS3000" that was the latest model in 2005.The improvement of the DCS operativeness in the manufacturing premise and the maintenance of the watch environment were achieved by this update. It improved the efficiency of the field operation by these. Then, we examined what DCS could be operated by the wireless system. Wireless LAN network decided to be constructed in the factory, and we started development a mobile DCS. Mobile DCS is a system by which the operation and the watch of its own plant become possible. If it is a range where the electric wave of wireless LAN reaches, we can operate it from tablet PC and the portable terminal. As a result, the operation of the plant by the few people became possible. However, the problem was caused that worker's position in the site including patrol was not able to be recognized. The safety support system from which the worker acquired information. The address and the movement of the body (state of the acceleration). Now was introduced from a wireless terminal by the cooperation of Yokogawa Electric Corporation.


Experience of the Power Plant Optimum Operation System

Masayuki Saito Hachinohe Mill, Mitsubishi Paper Mills Limited

  Power Plant of the paper mill is operated with two or more boiler and turbine. The equipment should efficiently use many kinds of fuels. The fuel has coal, a crude petroleum, a black liquid, and waste, etc. The equipment should satisfy the supply of the electric power of the factory and steam. Moreover, the power generating cost should be assumed to be minimum. This time, the system that requested the best load balance of the boiler turbine was introduced. The system decreases the energy cost. Moreover, the operator's operation reduction is done. This system has decreased the difference of the operation of the boiler and the turbine by the individual variation. It introduces the equipment introduction.


Development of On-Line Fiber Orientation Control and Practical Using

Michihiro Fujiyama Yatsushiro Mill, Nippon Paper Industries Co., Ltd.

  We have succeeded in the development of the online sensor which measured the fiber orientation of the both surfaces of the paper in 1993. And it has been able to help improvement of the curl quality for more than 10 years. In this time we have developed a new online control system of the fiber orientation on both paper surfaces as worldfs first practical use technology in cooperation with Yokogawa Electric Corporation. In this system the edge flow valves and the slice lip actuators at the headbox are manipulated automatically to minimize the difference of the fiber orientation between both surfaces of the paper continuously. And it can also compensate the disturbance in the basis weight caused by the chang of the slice lip shape.
  Now we have been using this automatic control system on an actual copy paper machine since the beginning of 2007 and the curl quality of the copy paper has been improved and stabilized.


Introduction of Web Defect Inspection System with Color Distinction Function

Yoshihiro Tamura
Ashikaga Mill, Nippon Daishowa Paperboard Co., Ltd.

  Now, the demand to the improvement in quality from a user increases further. Especially the quality demand of the surface defect of the packing material of food is remarkable. The raw material used paper foreign body and the foreign body in the approach piping generate gColor defecth. And gRed defecth, is even the thing of about 1mm in the size is pointed out.
  The WIS that was able to be the color distinction was adopted to make user's demand product last year.
  This reports on the introduction details of this system and the operation experience until today this time.


Introduction of Moisture Sensor

Takamasa Mizutani
Kasugai Mill, Oji Paper Co., Ltd.

  It is observed that many of actions are taken for reducing power consumptions and/or higher efficiency in the paper machines recently. Among such actions, the improvement of de-watering performance in the press part is especially highlighted as the approach for higher efficiency .While the information of the press part is getting more important, various efforts are taken to monitor the % moisture and its related valuables. Previously there was no tool which was good enough to measure %-moisture in the press part. Under such situation, it had to be formulated by the mathematical transactions with the ordinal operational information.
  In 2007 Kausgai Mill made the modification on the press part of 4 M/C in order to realize the efficient operation both for fine paper and bulking paper. In this modification, the pressing pressure needed to be changed according to the grades and %-moisture at the press@outlet became the important index for the operation.
  Also the renewal of the dryer hood and ventilating facility was done with the approach of the energy saving. This required the monitoring of the amount of the water evaporated in the dryer, which was important for the efficient energy saving. Thus it was planed to install the moisture sensors at the outlet of the press and pre-dryer with expecting more reliable operation and energy saving through understanding the situation of the %-moisture in the sheet at these points.
  The case of 4M/C with installing the moisture sensor is described below together with another case for the other machine.


The Latest Fiber Analysis and Applications
-The Process Optimization by Online Fiber Shive Analyzer-

Naoto Takigawa and Tuomo Kalkaja
Metso Automation

  Optical sensor based fiber and shive analysis devices came first time available for pulp and paper industry end of 1970fs and early 1980fs. Those analyzes were installed during that time to the laboratories and fiber length measurement came standard tool to describe pulp quality. Early 1990fs on-line fiber measurement analyzers with automatic sampling came available. Also during 1990fs fast camera and data processing technology development allows use of matrix cameras and much more information was available from fiber quality. During these millennium analyzers has got more improvements which has done analyzers more fast, more repeatable and require less maintenance. Also more accurate image analysis methods have been developed and more different fiber quality variables are measured.


BTGfs Rotating Consistency Transmitter Twin Torque Using New Technology
-History in Developing and Features & Benefits of BTG MEK-3000-

Yoshio Ishitsu BTG Division, Spectris Co., Ltd.

  With 80 yearsf experience in consistency measurement, BTG can claim unrivalled expertise in this core facet of the pulp and papermaking process. In 1928, we launched the worldfs first inline consistency transmitter. In 1960, we brought to market the first generation of transmitters to use our patented rotating shear force technology. Over the intervening years, during which we have developed further generations of state-of-the-art transmitter, this measurement principle has been adopted as the industry benchmark for top of the range performance.
  With the MEK-3000 Twin Torque BTG unveils the next generation of rotating share force transmitters, offering a major advance in consistency measurement. Twin motors-the centerpiece of BTGfs patented design-deliver a host of unique advantages that will lift your performance to a whole new level. Outstanding versatility makes the Twin Torque suitable for a huge range of applications, from the most routine to the most difficult. And since the standard version adapts itself to just about every challenge, there are fewer product iterations to deal with, simplifying operation and maintenance.
  Easier, smaller, smarter, lighter-the Twin Torque lives up to its tagline, combining exceptional ease of use with small size, outstanding signal processing and lightweight design.


Recent Report on Deinked Pulping Process in Japan

Pulping Technical Committee, JAPAN TAPPI
Mitsuhiro Sugino, Nippon Paper Industries Co., Ltd.
Tsukasa Watanabe, Oji Paper Co., Ltd.
Kouji Shioya, Kishu Paper Co., Ltd.

  In recent years, the importance of DIP has been increasingly augmented by the rise of social demand for efficient use of resources and environmental consideration. However, as a matter of fact, the technical information about DIP production and equipment is insufficient. Therefore, the pulp technological committee conducted questionnaire survey on current situation of DIP operation and equipment of domestic DIP plants in order to offer and share technical information among our industry. In this report the results of the questionnaire are presented.


Characteristics of Eucalyptus Woods from Plantations in South Africa for Kraft Cooking

Mitsuko Homma, Shiho Takahashi, Akiko Nakagawa-izumi and Hiroshi Ohi
Graduate School of Life and Environmental Sciences, University of Tsukuba
Keiichi Nakamata
Technical & Development Division, Hokuetsu Paper Mills, Ltd.

  Eucalyptus woods (E. nitens, E. smithii, E. grandis, and E. macarthurii) grown in South Africa as pulp and paper grade hardwoods, which are expected to be raw materials used in a Japanese pulp mill, were investigated to clarify their characteristics for kraft-anthraquinone (AQ) cooking and totally chlorine-free (TCF) bleaching. E. smithii wood had the highest density (0.665 g/cm3) next to E. macarthurii wood. It was shown that E. smithii wood was most easily delignified and had the best response to cooking and bleaching. The Klason lignin content of E. smithii wood was 22.8%. It was a little higher than that of E. nitens, but much lower than that of E. grandis and E. macarthurii. Furthermore, E. smithii wood gave the highest syringaldehyde to vanillin ratio (S/V ratio, 4.18) by alkaline nitrobenzene oxidation analysis. Therefore, E. smithii wood should show good delignification during cooking and bleaching. All eucalyptus full bleached pulps gave high brightness, E. smithii showed the highest brightness (86.7% ISO).

Keywords: eucalyptus, density, alkaline nitrobenzene oxidation, kraft-AQ cooking, hexenuronic acid


Photochemical Bleaching of Kraft Pulp by UV Radiation

Kazuhiro Kurosu, Shoichi Miyawaki and Takashi Ochi
Pulp and Paper Research Laboratory, Nippon Paper Industries Co., Ltd.

  Potential of ultraviolet (UV) radiation as a bleaching method for kraft pulps were investigated. Some conditions that improve bleaching efficiency based on a consumption of electricity were revealed. It was shown that photochemical bleaching efficiency was significantly improved by hot acid pretreatment that is often adopted in ECF bleaching sequence of hardwood pulp. It is thought that removal of iron ion from the pulp by hot acid treatment before UV irradiation contributes to better brightness enhancement by UV.
   Simultaneous treatment by UV and ozone, which is a well-known system in water treatment area as advanced oxidation processes, was revealed to be highly effective method for photochemical bleaching. It is suspected that hydroxyl radicals are generated in UV/ozone treatment, and that they react with carbohydrates as well as lignin, resulting in considerable damage to fiber. However, this UV/ozone treatment did not seem to have a detrimental effect on strength of the pulp. When mill bleached hardwood pulp was treated by UV with ozone, brightness was enhanced from 86 to 91% while tensile strength of the treated pulp was almost the same as that of untreated one.
  Although the efficiency needs to be improved further and more thorough understanding of the reaction mechanisms of photochemical bleaching is required, it is suggested that photochemical process has a possibility to be adopted as a certain part of industrial total chlorine free (TCF) bleaching sequence.

Keywords: photochemical bleaching, UV, hot acid treatment, ozone, advanced oxidation processes, hydroxyl radical