2008年3月 紙パ技協誌

[プリント用ページ]
JAPAN TAPPI JOURNAL March 2008


Vol.62 No.3 Abstracts


Recent Trend of Information Technology

Seiichi Shin
The University of Electro-Communications

Abstract
  IT (Information Technology) is developed in the former Century, as G Hz processing, G bps communication, and G B storage. Ability of machines with computer have been already overwhelming human beings. How to use IT, is a key factor in factories of the 21st Century. Utilization of IT is introduced here and a future of IT is forecasted as integration of material, energy, and information.


Law and Regulation Trend for Machinery Safety and Safety Measures for Production Facilities

Takahiko Arai
OMRON Corporation, Industrial Automation Company, Business Promotion Section, Safety Devices Sales Dept., Sales & Marketing Division HQ

Abstract
  For the domestic manufacturing industry, it is important management subject to ensure Machinery Safety in a production activity. There are two reasons. First reason is the change of law or international standards for Machinery Safety. Second reason is change of social concern of machine safety. As background, accidents occur frequently in our daily life such as train, elevator, and revolving door and so on. So safety is increasingly treated as a general problem. In the case of the manufacturing industry, we have avoided the danger by means of a telepathic communication. The reason for having functioned well is all workers were well-trained and many experts were in factory. However, part-timers or temporary workers are increasing in recent production line.
From these change, it is very important to take measures of preventing accidents in factory.
  In addition, revised Industrial Safety and Health Law was enforced in April, 2006. Changing of regulation and social concern, we need to take suitable machine safety method.


Development of Field Operation Assistance for Oil Refineries

Go Suzuki, Youichi Nishi, Michitaka Kosuge and Hodaka Nishiyama
Toyo Engineering Corporation

Abstract
  In these years, industry accidents are unfortunately increasing and a social request to prevent these accidents are increased. We have developed a system to assist field operator’s operational activities and to find out their operational know-how by which we could educate operators effectively. The system consists of an explosion proof wireless wearable device, which are a camera on a helmet, acceleration sensor, battery and radio, and database and data analysis systems, which find out the information recognized the attended situation of the work position / posture / scene of the field operator by human behavior analysis algorithm. We could extract scenes in which characteristic of operator behavior were different from the daily work, since we could store observed data automatically and search them using the results from the human behavior analysis algorithm.


An Example of Applying the Model Driven PID Control for a Boiler Control

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

Abstract
  PID control is the most typical algorithm for process controls. Since the time of pneumatic instrumentation, it is familiar control algorithm that has wide adaptability until today. And it also will be used in many processes for the future. On the other hand the Advanced PID control has been generalization with the development of digital control and computer technology like a DCS. It is more useful technology for the making stable operation and increase efficiency by using the new control concept or improved PID control. Nowaday many control algorithm has been developed.
  In this paper we show the result of improving turbine efficiency and reduced the energy by installing the Model Driven PID (MD-PID) Control for the main steam pressure and main steam temperature control of a coal boiler in Yatsushiro mill.


Introduction of Non-contact Caliper Sensor

Hiroaki Sakaguchi
Yonago Mill, Oji Engineering Co., Ltd.

Abstract
  There has been a large demand of the improvement in the thickness measurement for coated paper for many years. Especially for the higher grade white coated board, the contact caliper sensor is not a best fit due to its marking problem on the coat surface.
  The improvement of the contact which physically contacts with paper has been struggled to avoid marking on the paper by changing the contact materials and/or contact pressure. But they deteriorated measurement accuracy and finally have not become the solution.
  In May 2006, upgrade of QCS from Honeywell MXOpen to the latest DaVinci system was done for 3M/C in Yonago Mill. At that timing, Honeywell had just announced the release of non-contact caliper sensor and we decided to apply this in this upgrade.
Honeywell’s non-contact caliper sensor is the technology using laser to measure the thickness without contact and best fit for the sensitive paper surface. The caliper measurements for the grades for which have not been done before due to the marking would bring large benefit and effect.
  In this article, the actual application of Honeywell’s laser caliper sensor would be reported with measuring data.


Introduction of Non-contact Caliper Sensor

Naohiro Kosugi
Takaoka Mill (Nohmachi), Chuetsu Pulp & Paper Co., Ltd.

Abstract
  The measurement of the paper thickness is one of the most important factors for paper quality. According to the progress of the paper manufacturing technology, evolution of sensor technology becomes to be required. For example, the operating condition of the contact caliper sensor becomes more severe due to higher speed machine and higher temperature in calendar. The problems of the contact caliper sensor are making flaw on the paper surface and the shorter life time. So the non-contact caliper sensor has been expected, which eliminates these problems.
  For N1 machine in Takaoka Mill, the old QCS (Vision 2002 UT) provided by Honeywell was upgraded to their latest model of DaVinci QCS in May 2006. Honeywell started the development of non-contact caliper sensor using laser beam more than 10 years ago and the complete laser caliper sensor developed was released in June 2006. So in November 2006, we decided to apply this new laser caliper sensor to Honeywell DaVinci QCS with expectation of the eliminating the problems of the flaw on the paper surface, abrasion of sensor contact surface and accumulation of the pitch on the sensor contact surface.
  We would therefore like introduce the results of this application which is the first experience for the uncoated paper and the challenges for the future application.


Selection of Web Defect Inspection System for a Board Machine

Kenji Nishimura
Nippon Daishowa Paperboard Yoshinaga Co., Ltd.

Abstract
  Yoshinaga Mill 50m/c produces mainly white lined chipboard (WLC). (White lined chipboard (WLC) is called "coat white ball" in Japan). About 80% of the Products are used for Food and Medicine Packaging. So, DefectLesson the web is one of the most important qualities. Recently User’s demand for the quality was more and more severe than before. And some users point out "present inspection systems on board machines can’t find any Particular kinds of defect"
  Therefore we studied some new inspection systems and we selected the one among them, renewed an old system. We present the details of the study and selection.


Operation Experience of Mobile DCS and Its Future Development

Akihito Takahashi
Nayoro Mill, Oji Paperboard Co., Ltd.

Abstract
  At Nayoro Mill, there are two paper machines and three pulp production lines. In each line of operation has been carried out by YOKOGAWA ELECTRIC DCS "CENTUM CS3000 Small and CS1000".
  During Mill shutdown from late 2006 to early 2007, pulp division was reorganized for the sake of labor-saving. To curry out mutual support for each pulp production line, three of pulp DCS and DCS for 2M/C Stock Preparation were completely integrated. At the same time, Mobile DCS system was newly added on the integrated DCS.
  Using Mobile DCS, an operator bringing mobile PC can operate process wherever possible outside of Central Control Room. At Nayoro Mill, four wireless LAN terminals and twenty Access Point have been installed. From the beginning of introducing Mobile DCS, it is really effective for checking control loop and monitoring. At this time Mobile DCS is essential tool for Grade Change and other action for process troubles.
  This article reports introducing process and the effect in service of Mobile DCS, and remarks about its future development.


The Introduction of On-line Dirt Analyzer for Recycled Fiber Process

Satoshi Tanaka
Hokuetsu Paper Mills, Ltd., Niigata Mill

Abstract
  Hokuetsu Paper Niigata Mill has two recycled fiber processes. The A-line, started up in 1991, was rebuilt several times to receive increasing recycled fiber utilization. In addition, B-line started up in 2004.
  The key of recycled fiber quality is dirt and brightness. Especially for dirt analysis, fiber samples must be picked up every hour before B-line startup and that was heavy task for operator. Therefore, on-line dirt analyzer was required for new recycled fiber process and examined the best type for the B-line. As a result, the on-line dirt analyzer the type of which makes pulp sheet was adopted.
  This report describes the process of studying analyzer and analyzing condition at work.


The New High Precision Gamma-ray Density Meter PH-1000: Certificated by MEXT

Hiraku Miyashita
Nanogray Inc.

Abstract
  Before 2005 exemption level of sealed gamma-ray(-ray) source activities is 3.7MBq in Japan. Radiation protection regulation of Japan was changed and the exemption level was reduced in 2005. At that time, new certification system was started by MEXT. The certificated equipments can be used without any license and controlled area. All products of our -ray density meters, -ray level gauges and -ray level switches had the certifications from MEXT.
  Nanogray Inc. introduces brand-new certificated -ray density meter PH-1000 and PM-300. PH-1000 is precise and has only 0.2〜0.28% error @ 2. PM-300 is light (6kg), tiny and can be changed applied pipe size in a moment. Density meter PH-1000, PM-1000 and PM-300 can be applied density measurement of black liquor, green liquor, lime mud, calcium carbonate, and white carbon etc.


Advanced Winder Adviser Controlling to a Winder Operation

Noriyuki Watanabe
Cognex K.K.

Abstract
  The quality and process improvements associated with the SmartView Paper Web Inspection System and Advanced Winder Advisor (AWA) package are highlighted. AWA can control to a winder accurately, using inspection data and synchronization by SmartView Paper web Inspection system. The results are (1) Stopping at desired defects within ±10 cm, (2) Reduce winder operation time.
  SmartView and Advanced Winder Advisor package allow users to have best performance of inspection and winder operation.


Drainage Meter in the Forming Section
- Introduction of "Fiber Scan Mk II" -

Yoshiyuki Kawabata
Customer Service, NOMURA SHOJI Co., Ltd.

Abstract
  CRISTINI invested three years in the development of a new measuring instrument called FiberScanTM that utilizes innovative measuring qualities. FiberScanTM is a new measuring method based on microwave technology for drainage measurements in forming section.
  Through this method it is possible to find out very quickly the periodical variations (pulsations) in forming section. With this instrument it is possible to make pulsation studies very quickly and uncomplicated.


Relationships between Macroscopic Paper Structure and Water-Absorption Behavior

Kuntinee Suvarnakich
Department of Imaging and Printing Technology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
Toshiharu Enomae and Akira Isogai
Graduate School of Agricultural and Life Sciences, The University of Tokyo

Abstract
  Macroscopic structure of paper influences how paper behaves in many ways. In this research, the relationship between macroscopic paper structure and water absorption behavior was investigated. The structure of the handsheets made from commercial hardwood pulp was modified by varying basis weight, beating levels and wet press levels. The structural properties as well as the water absorption properties were measured. The results from contact angle measurement showed the same trend as the results from the automatic scanning absorptometer. Water absorption behavior greatly depends on surface structure. Smooth surface results in easy spread of a water drop and an increase in contact area. Any factors that change the paper surface structure will likely result in changes of its water absorption behavior as well. For surface chemistry, an increase in basis weight produced sheets with higher sizing agent (AKD) retention, thus causing higher contact angle of a water drop.

Keywords: Automatic scanning absorptometer, beating, contact angle, water absorption, wetpress


Analysis of Oil Stain on Paper by Charged Aerosol Detector

Masayuki Omatsu
Material Analysis Center, Oji Paper Co., Ltd.

Abstract
  Recently developed Charged Aerosol Detector (CAD) for HPLC is useful as an universal detector for analysis of non-volatile, pyrolysis, polar compounds, as well as no UV・VIS absorption compounds. In case of analyzing of oil stain on paper samples, the origin of stain could not be specified even if standard oil samples were available in some cases. In this paper, a new method for analysis of oil stain on paper using the CAD will be reviewed.

Keywords: Charged Aerosol Detector (CAD), HPLC