JAPAN TAPPI JOURNAL
Online ISSN : 1881-1000
Print ISSN : 0022-815X
ISSN-L : 0022-815X
Search
Advanced search
OR
Browse
Search
Volume 61, Issue 3
Displaying 1-17 of 17 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
Process Control and Automation
  • On the Occasion of the Manufacturer’s Presentation (Maker’s Lecture) , the 30 Years of History for Instrumentation
    Process Control and Automation Committee
    2007 Volume 61 Issue 3 Pages 262-272
    Published: 2007
    Released on J-STAGE: November 18, 2009
    DOIhttps://doi.org/10.2524/jtappij.61.262
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    As a memorial to the 30th anniversary of instrument show, we have planned a manufacturer’s presentation. “The History and Future” of instrument system are presented by various manufacturers. At the same time, we made the chronology of “The instrument technology of pulp and paper” and insert them.
    View full abstract
    Download PDF (357K)
  • Innovation of Technology, History and Future Technology for QCS
    Satoshi Nakamura
    2007 Volume 61 Issue 3 Pages 273-277
    Published: 2007
    Released on J-STAGE: November 18, 2009
    DOIhttps://doi.org/10.2524/jtappij.61.273
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Fundamental technology of basis weight sensor was funded in ’40 s and it was used for survey meter for radiation. Since first QCS was introduced in ’50 s to the paper market, technologies for QCS were dramatically changed. Recently, Honeywell introduced new and unique technologies as SpectraFoil, Express Moisture sensor, GalView, Laser caliper sensor and Multi variable controls for Supercalender. And advanced camera technologies are used for new generation’s sensors as formation and fiber orientation. We believe those technologies are going to contribute making better paper in terms of quality and productivity.
    View full abstract
    Download PDF (646K)
  • Innovating Distributed Control System
    -The Past and the Future-
    Masatoshi Nakahara
    2007 Volume 61 Issue 3 Pages 278-282
    Published: 2007
    Released on J-STAGE: November 18, 2009
    DOIhttps://doi.org/10.2524/jtappij.61.278
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Distributed Control System (DCS) appears on the market as a substitution of a panel instrument or a distributed system of Direct Digital Controller. At the beginning stage DCS was growing based on the severe evaluation and the feedback from the customers of all process industries and finally DCS established the firm position as one of the indispensable equipments in the process industry. During this period the technical development of computers was remarkable and our office environment changed drastically however the basic architecture of DCS has not changed. This proves that DCS abstracted the necessary functions highly and integrated them from the beginning. Currently the production activity of the company regarded as one system. All the function in the company evaluated as the contribution of the profits of the company as a whole. Naturally, the expected role for DCS exceeds a limit as merely a distributed control system and it should be innovated as an important platform to operate the plant.
    View full abstract
    Download PDF (489K)
  • The WIS of Evolution and its History and Future
    Masahiro Nakata
    2007 Volume 61 Issue 3 Pages 283-286
    Published: 2007
    Released on J-STAGE: November 18, 2009
    DOIhttps://doi.org/10.2524/jtappij.61.283
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Now, the demand to the improvement in quality from a market increases further, and especially the quality demand of the surface defect of the packing material of food and medicine is remarkable. Each packing material maker planned the performance rise of surface defective inspection equipment more often, in order to respond to it. On the other hand, low cost and rationalization are advanced for company survival. OMRON had about 2,500 sets of the history of the enterprise of about 30 years. The delivery track records, expectation and a demand to the domestic maker from a user also had a severe thing especially. Positioning in the field of WIS is also severe and the equipment trouble has become a situation of carrying out a line stop and making it restore. Therefore, the demand of reliability to 24-hour operation is high. Also in order to answer to the expectation and the demand patronage-obtained for years from a user, in OMRON, it supposes that a model change is undergone as inspection equipment of the 7 th generation, and came to develop “Super NASP”. “Super NASP” is used as the indicator which respects and develops the opinion of a user, specification is determined as the basis of cooperation of a user. The viewpoint of its history, present, and future of WIS has described the text.
    View full abstract
    Download PDF (444K)
  • About the History and the Future of the Evolving MES
    Yasuki Nagai
    2007 Volume 61 Issue 3 Pages 287-292
    Published: 2007
    Released on J-STAGE: November 18, 2009
    DOIhttps://doi.org/10.2524/jtappij.61.287
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    In this paper, we introduce MES (Manufacturing execution System) . We first describe the history, and, next, explain the system that applies the Web applications as one of the latest technologies of MES.
    As a merit of the system that applies this technology, the long-term use for the application software, and the extendibility of the system are shown. It explains the function of the information system in the future at the end.
    View full abstract
    Download PDF (625K)
  • Technology Innovations of Field Instruments
    -Technology Innovations of Flow Measurement-
    Fumitaka Nozawa
    2007 Volume 61 Issue 3 Pages 293-299
    Published: 2007
    Released on J-STAGE: November 18, 2009
    DOIhttps://doi.org/10.2524/jtappij.61.293
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The customers utilize the differential pressure flowmeters and electromagnetic flowmeters on their sites to measure steams and pulp slurries. However these flowmeters have some issues to measure them stably. Especially the differential pressure flowmeters have clogging problems in the lead pipe, and the electromagnetic flowmeters have adhesive problems on the lining by pulp slurries. In this writing , I will propose the solutions for steams applications, and for black liquor and green liquor applications.
    View full abstract
    Download PDF (701K)
  • A Multivariable Brightness Control of Bleaching Process by Model Predictive Control
    Masahiro Kawakita, Yoshitatsu Mori, Jun Nishimura
    2007 Volume 61 Issue 3 Pages 300-304
    Published: 2007
    Released on J-STAGE: November 18, 2009
    DOIhttps://doi.org/10.2524/jtappij.61.300
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The needs of the optimal control for paper mills are increasing. The optimal control can reduce the cost and increase the productivity. MPC (Model Predictive Control) is a controller which can control the multivariable and long delay time system optimally, so the MPC is suitable for the optimal control of the paper plant.
    We applied the MPC system to the soft wood bleaching process of the KASUGAI Mill for the brightness control. The purpose of the brightness control is to stabilize the discharged final pulp brightness and to decrease the chemical cost.
    The sequence flow of the target bleaching process consists of [D1-E⁄O-P-D 2] stages. At first, we applied this MPC system to the D 2 stage of the bleaching process to verify the controllability of MPC to bleach process. As the result, we could see the contribution effect of the MPC system to stabilize the final brightness. The next target is to expand and to improve the MPC system to cover the whole process of the bleach plant.
    View full abstract
    Download PDF (362K)
  • Example of Waste Water pH Control by Fuzzy
    Takayuki Ohkura
    2007 Volume 61 Issue 3 Pages 305-309
    Published: 2007
    Released on J-STAGE: November 18, 2009
    DOIhttps://doi.org/10.2524/jtappij.61.305
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Seven loops of pH control for wastewater treatment plant at Oji Paperboard Saga Mill, which used to be taken control of with conventional PID algorithm, did not totally satisfy with its control response.
    Generally, pH controls for neutralization process have non-linear characteristics. In addition, dead time would be long at the wastewater treatment plant because of limited installation location of pH meter and would vary depending upon discharge volume. Accordingly, time consuming fine tuning procedure for PID parameters just covers some specific conditions, but never represents satisfactorily entire status of the plant.
    In this article, introduction of fuzzy control system in two out of seven pH control loops which had worse performance and had been strongly claimed for modification, significant improvement in control response and reduction of neutralizing agent cost after installation as well as principle of two loops with fuzzy system are summarized.
    View full abstract
    Download PDF (536K)
  • About the Adoption Made of the Other Companies DCS in the DCS Superannuation Update
    Hirokazu Tanaka
    2007 Volume 61 Issue 3 Pages 310-313
    Published: 2007
    Released on J-STAGE: November 18, 2009
    DOIhttps://doi.org/10.2524/jtappij.61.310
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    DCS introduced first in the grass processing place has passed 20 years since it operated, and has come to interfere from the production stoppage to the spending passing of time increase remodeling.
    In addition, the problem of the part supply and the maintenance time limit was instituted by the manufacturer, and the examination of the system update in parallel with the life prolongment measures started.
    It was judged that it was possible to change in a short time comparatively because the update by the migration method was proposed by another manufacturer, and the update of the entire system became possible without detaching external wiring and executed it though a phased partial update by the same manufacturer was examined from the relation between the budget and the construction period at first. It reports on the update case by the migration this time.
    View full abstract
    Download PDF (404K)
  • Improvement of DCS (Distributed Control System) Operation Under the Environmental Optimization of Industrial Conditions
    Yasuhiro Miki
    2007 Volume 61 Issue 3 Pages 314-322
    Published: 2007
    Released on J-STAGE: November 18, 2009
    DOIhttps://doi.org/10.2524/jtappij.61.314
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    For the last4or5years, incidents of DCS failure had been increasing at our Mishima Mill. Due to the increasing downtime these events were causing, the company undertook an in-house project to identify the causes and develop methods of reducing such failures.
    We analyzed the system’s environment and the hardware’s susceptibility to a number of potential irritants such as dust, temperature, humidity levels and corrosive gases (like hydrogen sulfide (H2S) , sulfur dioxide (SO2) , etc.) to see if we could reveal an obvious culprit. Our team also focused on improving the general conditions in control rooms and computer areas to make them more machine-friendly.
    In this report we detail the processes we followed to isolate the control system’s physical vulnerability vectors and the steps we’ve since taken which have resulted in a marked decrease in the number of hardware failures.
    View full abstract
    Download PDF (889K)
  • Installation of Next-generation Web-inspection-system and Verification of System Performance
    -Application of PROFInet, Control Bus-
    Tomoyoshi Kudoh
    2007 Volume 61 Issue 3 Pages 323-328
    Published: 2007
    Released on J-STAGE: November 18, 2009
    DOIhttps://doi.org/10.2524/jtappij.61.323
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The web-inspection-system is one of the indispensable systems as a tool of a quality control and defective cause investigation for paper making. Nowadays, reconversion of the system is achieved as full-digital system according to digital camera adoption. Nippon Paper Industries has been developed the next-generation web inspection system in collaboration with OMRON in earnest since March, 2005.
    In this paper, conquest of the weak point of an old Analog web-inspection-system and the circumstances of the improvement, the introduction details and quality assessment to the present stage of the system, and the future view are described.
    View full abstract
    Download PDF (661K)
  • Current State and Development in the Future of GelView Sensor on No.5 Coater
    Yutaka Maemura
    2007 Volume 61 Issue 3 Pages 329-333
    Published: 2007
    Released on J-STAGE: November 18, 2009
    DOIhttps://doi.org/10.2524/jtappij.61.329
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Old Honeywell QCS (MX-2002 ET) on No. 5 Coater in Hachinohe Mill was upgraded to new Honeywell QCS (DaVinci) on August 2005.
    DaVinci System can consolidate various Honeywell new sensors. The one of them is GelView sensors which are installed in the dryer to measure the coating surface quality directly after the coater head. GelView would make it possible to optimize the evaporation rate in MD position and coating speed, which lead to the improvement of the coating quality and the reduction of the energy of the dryer. GelView sensors were installed in June 2006.
    In this article, the results of the introducing GelView and the future of GelView would be reported.
    View full abstract
    Download PDF (637K)
Topics & Information
Research Report (Original Paper)
  • Development of Manufacturing Process for High Quality Calcium Carbonate by Causticizing Process in a Kraft Pulp Mill
    -Part 2 : Controlling Factors for Precipitation of Aragonite-
    Haruo Konno, Yasunori Nanri, Hideyuki Goto, Kazuto Takahashi, Mitsutak ...
    2007 Volume 61 Issue 3 Pages 340-349
    Published: 2007
    Released on J-STAGE: November 18, 2009
    DOIhttps://doi.org/10.2524/jtappij.61.340
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Precipitated calcium carbonate is produced as a by-product in the causticization step of the kraft pulping process. There are many advantages to use this by-product, causticizing calcium carbonate (CCC) , as filler and coating pigment in paper. By using this CCC for paper materials, lime-kiln operation can be shortened or stopped, resulting in the reduction of fuel oil for calcination of calcium carbonate. Furthermore, accumulated impurities in the lime cycle can be removed constantly. In our previous reports, we showed that aragonite crystal with high quality performance was obtained in the causticizing reaction. However, it is not clear the reason why high quality aragonite crystal could be obtained by the causticizing reaction. In this paper, the effect of reaction conditions on the precipitation of aragonite was precisely investigated. The results showed that aragonite crystal could be obtained under the conditions at optimum temperatures with relatively low CO32- concentration. In addition, the presence of NaOH in the mother liquor accelerated the precipitation of aragonite crystal. These favorable conditions to precipitate aragonite crystal can be easily formed in the causticizing reaction ; therefore, causticizing reaction is suitable to produce aragonite crystal.
    View full abstract
    Download PDF (645K)
Pulp and Paper Mills in Japan (66)
Coffee break
Papyrus
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top