2012年3月 紙パ技協誌

Vol.66, No.2 Abstracts

Back to the Normal Operation after Disasters ---- Restoration is an Option

Koji Toritani
BELFOR Japan Co.,Ltd.

When factories encounter disasters such as fire, flood, Tsunami, chemical leak etc. , it seems like whole replacement of damaged equipment is the only way to go back to the normal operation. However depending on the cases, restoration would be the vest option because it would minimize the cost and especially down time.
  Approximately 30 years ago Siemens and Munich Re jointly started restoration company in Germany, which was the precursor of BELFOR, to help such factories, building, public transportation, hospitals, stores and so on. In Japan BELFOR Japan started the service in 2004 and supported approximately 150 restoration projects including recent Tsunami in Tohoku and floods in Kii, Aichi area.

Approach for Electricity Demand Restraint of Oji Paper Group

Shinya Soeki
Technology Div., Oji Paper Co., Ltd.

The government carried out electricity usage restrictions based on the Electricity Business Act Article 27 for large consumers to support the electricity shortage due to the Great East Japan Earthquake. Offices and mills of Oji paper group worked on electricity demand restraint according to a “joint usage limitation scheme” based on the act and introduced a new demand monitoring system in order to monitor real electricity demand in real time.

Installation of Saving Space Color Web-Inspection-System and Verification of System Performance

Hiroki Kondo
Hokkaido Mill, Nippon Paper Industries Co., Ltd.

The quality demand to paper is getting very severe, because of extension of the share of imported low price products in the domestic market and the fiercer competition between manufacturers by making of high performance paper. Therefore, the demand for the inspection performance of web-inspection system has risen day by day.
Shiraoi 8M/C is a paper machine of maximum speed 580m/min that produces the fine paper by 235t/day. However the performance of the web-inspection system is not sufficient, because it inspects only felt surface by transmission reflection combined method.It has become difficult to satisfy the quality requirements from users, so we improved the performance of Web-inspection system in May 2011.
To solve the problems of limited space that the conventional inspection system can not be installed we selected space-saving web-inspection system (Super NASP-SF) by OMRON as the first domestic machine. Besides, we could build a system to satisfy the quality requirements. In this paper, we report details and effect of installation.

Diagnostics Function of New QCS Experion MX

Junichi Masuda
Honeywell Japan Inc., ACS, HPS, P3 Sales Dept.

Honeywell has conducted numerous interviews of many users to understand how technology can contribute to what is the paper industry and announced the new QCS “Experion MX” developed to respond to needs of users. I introduce “concept of this QCS”, “Diagnostic features that enhance”, “Tool of the diagnostic” and “New remote service” in this paper.
Upon strengthen the functions of the Diagnostic; the process from the sensor measurement to the server is divided into three layer nodes, so as to perform self-check and more information on each node. This technology is essential EDAQ. “Three layer nodes”, “EDAQ”, “Online Diagnostics”, “Online Web Page” can show the detailed data collection and online documentation. It can be served as tools of prevention and made early resolution of proactively troubleshoot problems.
“Preventive maintenance support tool” is enabling to increase in efficiency of the periodic maintenance. Remote maintenance uses the feature of Experion MX and is enabling work which the Honeywell expert is checking from the remote place like at the site. Furthermore, remote service is equipped also with a process report, each control analysis, the power spectrum analysis, and the sensor analysis.
These features can be expected to contribute to long-term stability of systems and products.

1 C/T Web Defect Inspection System, Sorting Control System Renewal

Tohru Ohmori

  The No.1 cutter defective detector and sorter control device which are for [ of 50 M/C ] white board products saw the 23rd year from installation, and accuracy maintenance and a maintenance suited their difficult state in having ended the maintenance contract.
    Since the products of 50 M/C have much demand for medical treatment and food uses, in order to strengthen the quality control organization. As a result of introducing a color defective detector into No.2, 4, and 5 cutter surface from March-09, detection demonstrated the effect till then to the difficult light color defects (color spot etc.), felt depilation, and the escape prevention of the insect mixing article.
    This time, strengthening of the further quality control organization and stabilization of operation were attained by a No.1 cutter defective detector and updating a sorter control device simultaneously collectively.
    Here, the updating example about a color defective detector and a cutter sorter system introduced into No1 cutter is reported.

Hachinohe Mill : Restoration of Electric Instrumentations After Great Earthquake and Tsunami

Norio Matsukawa
Mitsubishi Paper Engineering Corporation

The great east Japan earthquake disaster occurred on March 11 2011, and the Hachinohe Mill of Mitsubishi Paper Mills was hit by the earthquake of a seismic intensity ”5-upper” and a tsunami of 8.4m in height.
There was minor damage caused by the earthquake to the mill, but the damage caused by the tsunami was quite severe. Especially, the damage to the electric instrumentations were quite heavy and required great efforts for their resumption.
In this report the damage in Hachinohe Mill is described together with (1) the restoration of power plants, transformers, power supply switch boxes, DCS, motors and local control equipments, electrical instrument rooms, control cabinets and equipments, (2) keys for the early restoration based on these experience, and (3) up-to-date resumption of the mill.

Equipment Cleaning Services in Support of Yokogawa Earthquake Recovery

Motokazu Kuremoto and Yoshimi Sakozono
Repair center, Yokogawa Field Engineering Service Corporation

We heartfelt sympathy to everyone affected by the earthquake was off the northeastern Pacific Ocean on March 11, 2011.
Realizing early recovery of the plant resumed production was affected in the earthquake damaged shutdown, as an example of one of the challenges manufacturers anticipation of cost savings and environmental protection were carried out in Nippon Paper Industries Ishinomaki Mill "Cleaning Equipment service "to introduce.
The tsunami earthquake by, first floor submerged plants for several days.
Approximately two weeks surrounded by debris and sludge in the plant water was banned.
Of the total loss seemed to the first floor equipment, we got down to cleaning equipment to remove the power of the FCS and cards.
Even when a few weeks later, the card did not contain electric kidney was confirmed by washing the normal operation.
Based on the facts of normal operation, we began the rescue operations were under water control devices.

Introduction of an Optimal Load Allocation Control System for Turbines

Kazuhisa Toyama

Various approaches are taken to energy-saving and CO2 reduction in pulp and paper industries which consume much energy.
This paper introduces an optimal load allocation control system for turbines which secures both requirement of manufacturing process and reducing such energy consumption as electric power and steam.

The Traceability System for Food Factories
―The Approach to Enhance the Quality Assurance Management―

Atsushi Toda and Yuichiro Numayama
Solution Department, Business Headquarters, Advance Automation Company, Yamatake Corporation

Consumers are becoming more and more conscious about safety and security for their food these days. That forces food manufactures to control the quality of their products to assure their safety by running some safety or quality assurance system like Hazard Analysis and Critical Control Point (HACCP) or ISO9001. Moreover, their brand can be continuously refined by realizing the traceability system, which assures the quality of the products from the materials, production processes and to their supply chain. In the food factories, the system can handles many different kinds of materials and should be able to applied to the variations of controlling materials including packaging materials that changes their characteristics due to the change in seasons, temperatures, smells from their environments. This work is to show how food factories can realize the traceability system by applying a Manufacturing Execution System (MES) and to lead the secure and efficient quality assurance management.

New Developments in Measuring Online Paper Structural Properties and Printability Prediction

Hisashi Tsuyuguchi, Markku Mäntylä, Marko Toskala and Jukka Sorsa
Metso Autonmation K.K.

The challenge of today’s paper makers is to make a better or at least keep the same printable paper surface quality from less expensive raw materials and with less production costs.
  Metso has invested during last years to develop camera based measurements technology for this purpose. This includes Web Inspection features, like formation measurements and online scanning optical and imaging based applications, like optical caliper, formation, fiber orientation and topography measurements.
  Utilizing these new developments of measuring online paper structural properties, the printability can be predicted in a new better way, in order to eliminate or reduce the reclamations from the printing house.

Establishment of Acid-Free Technology for Coated Paper in Hachinohe Mill

Research team for acid-free paper technology in Hachinohe mill
Mitsubishi Paper Mills Ltd.

In recent years, most of the printing paper is acid-free paper produced in neutral or weakly basic condition, and it is more difficult to find the acidic paper in the market.
In addition, even newsprints read every morning are also becoming acid-free paper in Japan.
In 1980s, the deterioration of books in libraries gain the attention of the public worldwide, and minimization of the sulfate radical which made the printing paper deteriorated and shift to acid-free paper which have the excellent self life were required also in Japan.
At that point, some special paper had already been acid-free but most general printing paper was still in the predawn to acid-free in Japan.
Mitsubishi Paper Mills Ltd was not the first paper mill to start development of acid-free paper in the market. However, we combined acid-free paper making and high solid content coating as the project according to the beneficial information of experience and knowledge in both North America and Europe, and this combination could made the whole plant promptly converted to the acid-free system, and the project finalized. As the result, high-quality acid-free paper and coated acid-free paper could be quick commercialized in Nakagawa mill and in Hachinohe mill respectively.
Since approximately 30 years after the first mill trial of acid-free paper and more than 20 years after completion of acid-free system have passed, the background and technical approach on development of acid-free paper mainly for coated paper in Hachinohe mill at that point is here reported with the aim of technical succession and conservation.

Development of a Technique for Removal of Hexenuronic Acid in ECF-Bleached Pulp Using UV Irradiation

Shiho Tsuji(Katsukawa) , Shoichi Miyawaki, and Tomoaki Koyanagi
Research Laboratory, Nippon Paper Industries Co., Ltd.

The potential to degrade hexenuronic acid (HexA) of hardwood ECF-bleached kraft pulp using ultra violet (UV) irradiation was investigated. UV treatment of these pulps resulted in a significant reduction of HexA contents under the acidic conditions, and the most suitable wave length seemed to be 254 nm. The HexA contents of hardwood ECF-bleached (D-E/P-D, A*-D-E/P-D, Z-D-E/P-D) pulps could be lower than 1 mmol/kg using UV (254 nm) irradiation under pH 3, while the required irradiation time depended on the original HexA contents. Acid-sized papers made from UV-irradiated pulps showed inhibition of yellowing induced in the aging test, so that UV irradiation has a potential to be developed as a method for inhibiting the yellowing of acid-sized papers containing HexA.

Keywords:hexenuronic acid, UV irradiation, yellowing, acidic paper, hardwood kraft pulp