|2010 March JAPAN TAPPI JOURNAL
Vol.64, No.3 Abstracts
The Roll of System & Control Engineer of Steel Plant and the Recent Technology Trend
Systems & Control Engineering Div., Environment & Process Technology Center, Nippon Steel Corporation
The process of steel plant requires the high reliability, which endures the 24hours continuous operation, high responsibility and high accuracy, which realizes the manufacturing at several micrometers accuracy in a high speed, high productivity and high efficiency, which realizes the reduction of labor and energy saving.
In this report, I give an outline about the technique trend of the characteristics such as a training system, software productivity improvement measure and the operation support system realizing the organization of the system and control engineer in the steel industry and a role / personnel training and technique tradition on the basis of the above-mentioned trend.
Tomioka N-1 Control System
Tomioka Mill, Oji Paper Co., Ltd.
PM N-1, which is the All-Online-Concept paper machine, had been built in Tomioka mill. There are two main purposes to build the machine. One is to increase productivity of the LWC which has the growth market; another is to enhance global competitiveness at this market. We started the trial operation of the machine at the beginning of November 2008, and then the commercial operation successfully from the February 2009.
This report presents the outline and the feature of the control system introduced into Tomioka N-1.
The Introduction Progress and the Future Tasks on Niigata N9 Machine Control System
Automation Dept., Niigata Mill, Hokuetsu Kishu Paper Co., Ltd.
N9, fourth on-coater machine in Niigata mill, has started commercial production since September 2008. It aimed at high productivity and cost competitiveness as high-speed¥wide-width¥A3 paper machine, and its right starting up was accomplished.
Formations of machine equipments are separated in the Coating section and other section. Voith-IHI Paper Technology was chosen on the Coating section and Metso Paper was chosen on the Head box to the Pre-calendar and the Reel section.
In this paper, we would like to report the introduction progress and the future tasks about Metso MCS (Machine Control System) which we innovated on N9 operation.
The World Trend of Drive Systems for Paper Plant
Yaskawa Siemens Automation & Drives Corp., System Application Dept., System Engineering Div.
Yaskawa Siemens Automation & Drives Corporation (hereafter referred as YSAD) was founded in the year 1999 as a joint venture between Yaskawa Electric Corporation Japan (hereafter referred as YEC) and Siemens AG Germany (hereafter referred as Siemens), thus combining Japanese and German know-how systems and solutions engineering. We offer industrial electrical systems in many industry segments except steel and public work projects, and electric and electronics products and after-sales service with YEC products and SAG drives.
In the paper and pulp industry, our products and systems had been applied for many years before YSAD was established and since the establishment we can offer them Siemens products as well as YEC ones to meet the usersf need. And our know-how of equipment accumulated through the strong relationship with the paper manufacturing companies and the machine makers in Japan and the overseas drive system technology are combined, which enables us to offer the optimum system with the latest technology.
This time the world top class project was completed in cooperation with Siemens I&S (Industrial Solutions and Services) that is the system engineering section of Siemens. We introduce the idea and the core technology in the paper manufacture machine control of Siemens in a part of SIPAPER CIS.
DRIVE YSAD will play a leading role to develop a new Japanese style and contribute to improve the electricity and the instrumentation technology of the paper pulp industry in Japan in the future, by absorbing the Siemens philosophy to integrate with the technology that we have cultivated in the Japanese market.
Introduction of the Energy Saving Activity in the Factory
-Success Key Factors for Energy Saving Approach-
Yamatake Corporation Advanced Automation Company, Sales Headquarters, Sales Engineering
The first period of the Kyoto Protocol committed in 1997 will already have started in 2012- 2008.It aims at 5% reduction compared with 1990 in the entire advanced country and Japan is declaring the reduction the comparison 6% 1990 year. Advancement and a constant effort of a great energy-saving technology, and the amount of the CO2 emission is increasing tendencies in gross weight by a production increase in the unit requirement according to the effort of each enterprise compared with 1990 though conservation of energy is advanced. Conservation of energy is called the one to squeeze a dry dustcloth well. There was a limit in great capital investment and optimization in the energy use by cooperation with the energy-user came to be requested only by the energy-supplier though it had been certainly centered up to now to supply energy and executed energy conservation.
It introduces the case where effective energy saving achieved by the approaching by the cooperation of both the energy supplier and the energy user.
Use Case of Non-contact Caliper Sensor
Susumu Nozoe and Shingo Totsuka
Fuji Mill, Nippon Paper Industries Co., Ltd.
QCS (Quality Control System), one of the important components for Quality Management of papermaking processes, has been still improving since it was introduced almost half century ago. Recently it picked up to develop new sensors and the most remarkable sensor of those would be Non-Contacting Caliper.
F13M/C-F33C/R at Fuji mill produces Light Weight Coated Paper. The products include more of recycled pulp and the machine speed was increased more than 1200 m/min. Through the above machine operation, the paper damages from pinching actions of Contacting-Caliper sensor would become a bigger problem. Additionally down stream process of F33C/R has a lot of concerns about paper damages by using Contacting-Caliper, so we usually give up its continuous use.
To solve those problems, new Metso QCS with Non-Contacting (One side light-touch) Caliper was installed at F13S/P as a QCS renewal project last August. Also at F13M/C Honeywell Non-Contacting Caliper has been tested since last October.
This paper introduces the results for each of those and issues to be taken.
Evaluation of DCS for User Engineering
Otake Mill, Nippon Daishowa Paperboard Co., Ltd.
Distributed Control System (DCS) is necessary for the process industry like oil, chemicals, medicine, steel making, etc. including the pulp & paper industry. DCS is used as a plant monitoring and control tool and it assists the automation, conservation of energy, quality control, etc.
When we evaluate DCS, we focus on price, compatibility, after-sales service, user friendly interface and actual performance. But convenience for guser side engineeringh is often overlooked.
The operator interface of the recent DCS is Microsoft Windows. Engineering has become easy. We can draw graphic interface and make control logic by ourselves. This report evaluate gengineeringh aspect of several different vendors DCS from user point of view.
Maintenance and Renewal of Drive Systems for Paper Machines
Paper & Material Handling Systems Engineering Department, Industrial Automation & Drive Systems Division, TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION (TMEIC)
Half a century has passed since the first sectional drive was applied to paper machines. Drive units supplied by TMEIC reached 10,000. A lot of main drives have been operated for 20 years or more. Failures of the equipment would be increased. Continuous stable operation of the paper machine is important, however, the failures may cause long down time and less productivity. Therefore, the maintenance and renewal become inevitable more and more for the stable operation of the drive systems. This paper introduces technical points of the maintenance and renewal for the drive systems.
Long Time Usage of Control Instruments DCS
Lifecycle Solution Center, Yokogawa Electric Corporation, Global Sales Div.
Yokogawa's 5th generation of DCS (Distributed Control System), CENTUM-XL will come to System EOS (End of Support) in September 2010. Maintenance support will have ended in 22 years since it was sold in 1988. Even Yokogawa has provided maintenance support service beyond EOS for customers who wish to continue to use our systems, this CENTUM-XL is hard to continue to support. In this paper, we would like to summarize the situation and let customers understand it.
Also, to get customer's consensus and cooperation, we explain the tasks to solve and some solutions for them for longer usage of our system.
Introduction and Problem of Valve Deterioration Diagnostic System
TECHNO SUPPORT CO., LTD.
In 2006, Tokai Pulp introduced Intelligent-positioner and Field-care System which enable to accumulate working data of Automatic Control valves in brand-new DIP plant. This is to aim at, by way of utilizing diagnosis technology, grasping the most appropriate timing when to conduct maintenance works,preventing troubles of Automatic Control valves and reducing loss caused by operation stoppage in the plant, and easing workerfs@burden coming from excessive maintenance works.
We are to explain up-to-date situation of systems which were introduced in DIP plant of Tokai Pulp on trial basis.
Control Example of the Biomass Boiler
Kishu Mill, Kishu Paper Co., Ltd.
The biomass boiler at the Kishu mill uses seven types of fuels. The shape and elemental composition vary among those fuels, and such variation is the source of fluctuation in the calorific value and the time of the combustion process. For stable combustion of the biomass boiler, it is necessary to set the furnace temperature set value in the gain adjustment of the control according to the combustion time and the calorific value of fuels; however, the compositional variation of the fuels currently in use at the Kishu mill is beyond the adjustability of the conventional PID control system of DCS.
Therefore, at the Kishu mill, we have installed and tested an additional control system with which the DCS would be able to adjust to the various fuel compositions. This paper describes the outline of the system and the test results.
The All New kajaaniPaperLab Automated Paper & Board Testing System with Completely New Generation for Off-line and At-line
Haruto Kondo and Masanori Shimozaki
Process Automation Systems, Metso Automation
After 25 years experiences and close co-operation with the customers, there has been launched new generation automated laboratory paper and board testing system comes from a completely new generation PaperLab to better match the needs of paper making today. The kajaaniPaperLab gives you freedom to move - from the lab right out next to the line - to give you the instant interactivity and real-time communications you need for faster results. You get answer without having to wait. Additionally, kajaaniPaperLab brings other unique features. By being designed in a highly modular manner, you have the Flexibility to personalize it to your own mill environment - to make it a member of your paper making team. All modules work together as a seamless package, ensuring the highest level of productivity. And we have built in the lowest cost of ownership so that you are free to move ahead and focus on improving your production performance.
Analysis of a Delignification System Using tert-Butoxide as a Base
Kineo Takeno, Tomoya Yokoyama and Yuji Matsumoto
Laboratory of Wood Chemistry, Department of Biomaterial Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo
The -O-4 bond cleavage of dimeric non-phenolic lignin model compounds, 2-(2-methoxyphenoxy)-1-(3,4-dimethoxyphenyl)ethanol (3) and 2-(2-methoxyphenoxy)-1-(3,4-dimethoxyphenyl)propane-1,3-diol (4), was examined in potassium tert-butoxide/tert-butanol (KOtBu/tBuOH) and potassium tert-butoxide/dimethylsulfoxide (KOtBuDMSO) systems. The -O-4 bonds of (3) and (4) cleaved in both systems under conditions, 0.5 mol/l KOtBu at 30oC, which are much milder than those in general alkaline based pulping processes. The yields of an identified reaction product, 4-acetyl-1,2-dimethoxybenzene (acetoveratrone, (5)), in both systems were different from each other. This result suggests that the mechanism of the -O-4 bond cleavage is dependent on the solvents. The disappearance of (4) was faster than (3), suggesting the participation of the -position of (4) in the -O-4 bond cleavage. The degree of delignification was also examined in these systems using beech wood meal and chip. When the wood meal was applied, delignification was sufficiently attained in the KOtBu/DMSO system under conditions, 0.5 mol/l KOtBu at 110oC, while the KOtBu/tBuOH system did not work well. Neither system attained delignification, when the wood chip was cooked. A mild soda cooking as a post-treatment and a soaking in DMSO at room temperature for 2 weeks as a pre-treatment did not improve delignification. These results suggest that the insufficient delignification is probably attributed to the difficulty in the penetration of KOtBu into the chip.
Keywords: carbohydrate, DMSO, lignin, pulping, tert-butanol, tert-butoxide