The Latest Elevator
Mitsubishi Electric Corporation, Inazawa Works
@An elevator group
control system controls a multiple of elevator cars to improve
the traffic efficiency in the building. In the recent
group-control systems, AI (artificial intelligence) technologies,
such as fuzzy theory and neural networks have been applied.
paper, we introduce to the history of elevator group control, and
the latest group control system gSigma AI-2200h as a product
The Basics, the Application and Great Possibilities of IC
IC Tag (RFID) has lately attracted considerable
attention. IC tag is effective tool to solve the problems in the
field of industries.
But if we use it without understanding its essence, it would not
give us any merits.
At first this paper describes the basics of IC
tags (RFID), for example communication method between tag and antenna,
IC Tags and its characteristics. The 2nd issue is the introduction
of some applications using IC tags (RFID).The last issue is the trends
of standardization in the world and its possibilities in the future.
Reduction Strategies of Construction Term and Cost in DCS Renewal
Niigata Mill, Hokuetsu Paper Industries Co., Ltd.
@It has been over
20 years since the first DCS was installed for process control. Hokuetsu
Paper Mills LTD. Niigata mill renewed two
superannuated DCS. Although the model of the both DCS were the same,
the used updating methods were different. This report deals with
outline of reduction strategies in construction term and renewal
cost at two examples of DCS renewal.
DCS Renewal at Kishu Mill
Kishu Mill, Kishu Paper Co., Ltd.
Kishu Mill introduces DCS into pulp
process, power process, and paper-making process, etc., and is performing
operation by CRT operation.
After the introduction of DCS into the Kishu Mill, about 20 years
have passed. The system has been updated by the reconstruction of
a plant, the problem on maintenance, etc. The updating example of
DCS in pulp process is reported this time.
A New Enhanced System for
Plant Maintenance Program
Nippon Paper Industries Co., Ltd., Technical & Engineering
A new enhanced system for plant maintenance program has been
developed in Yatsushiro@Mill in order to improve production efficiency
equipment condition. It should be expected the excellent tool using
computers for carrying out the PDCA plant maintenance cycle and getting
the best result within the limits of the budget. With this program,
we can exactly reduce equipment breakdown and maintenance cost, and
increase work efficiency. This paper outlines the feature and the
process of developing the new plant maintenance system.
on Process Control and Equipment Life
Process Control and Automation
Committee, JAPAN TAPPI
Recently the replacing of process control system
could not be proceeded. We collected the questionnaire data from
the supplier of instrumentation
and the user in pulp and paper industry about the life cycle of process
control system. On this time we report the result of our investigation.
Optimizing the Pulping Process by Using a New On-Line Analyser and
Experiences from Pulp Mills
Research Engineer, Sodra Cell R&D
Product Manager, Lorentzen and Wettre AB
admits new and more frequent measurements of pulp quality. Sodra
Cell, the leading market pulp producer in Europe,
has on-line measurements of fiber properties installed in all production
lines in the four Scandinavian mills for production of bleached chemical
pulp. The main purposes for the installations were to secure the
quality delivered to the customers by more frequent tests of quality
by measuring fiber properties. The system is used for quality optimization
of wood supply and process as well as control of transitions in the
Totally Integrated Automation System for Paper Making Plant
Yaskawa Siemens Automation & Drives Corp., System Design
The TIA shows that Totally Integrated Automation includes all
the components of an automation system: Controllers, HMI systems,
control systems, distributed I/O, drives (the SIMOTION Motion Control
System is a new addition here), sensors and actuators, integrated
communication links, and software.
TIA thus enables the solution of
all automation tasks in manufacturing and process control. The integration
of the process control systems
makes it possible to automate upstream, mainstream and downstream
with components of the same system.
This results in savings from engineering
to maintenance. Plant flexibility is increased by the high level
of integration, and savings can be
achieved in spare parts management.
MES applications of the SIMATIC
IT Framework are used for process optimization and allow connection
to the plant control level with
procedures for order processing.
B/M System 7SP - Introduction of Lifecycle Solutions for B/M System
Lifecycle Solutions Sales Div., Yokogawa Electric Corporation
Lifecycle Solutions Service Center, Yokogawa Electric Corporation
Yokogawa B/M system has 7 models and about 600 systems are in operation.
Half of them have been operated for more than 10
years and the one third have been operated for even more than 15
Under such circumstances, there are a couple of tasks for customers
to be solved as follows:
(1) Deterioration of reliability due to aging
system and increase of maintenance cost
(2) B/M system upgrading requirement
compiling to quality and production improvement by using sophisticated
production management system.
Yokogawa released g7SP (Lifecycle Solution
Program)h for DCS (Distributed Control system) in April, 2004. A
main focal point is to set optimum
service solutions for system lifecycle divided into 3 stages for
equipment of Introduction Support Phase, Operation Support Phase
and Migration Support phase as gf7 Service Innovationsh.
In this article,
2 problem-solving examples are introduced as lifecycle solutions
only for B/M system.
New Developed Porosity Sensor to be Applied to
the Coating Technology
Sales Development Dept., Honeywell K.K.
Porosity is an extremely important
property for almost all paper types and grades. It plays a crucial
role in the production of papers
for sacks, filters and cigarette wrappers, where air permeability
is an essential characteristic. In addition, correct porosity is
a key factor in paper printability. Paper porosity has been measured
for a long time, but until now, measuring porosity CD profiles in
real-time has been impossible. The fixed position online porosity
measurement system has been used for several years. In some cases
paper mills have measured porosity profiles from samples with manual
testing equipment or by means of automated paper testing systems.
Honeywell's new Porosity Sensor is the first online profiling measurement
sensor that offers the capability to control the porosity MD and
CD profiles. This means it is possible to have more uniform paper
quality, and tools to better meet the quality expectations of customers.
Papermakers have knowledge and experience about factors affecting
the air permeability profile. The same CD profiling units that affect
other profiles also affect the air permeability profile: water removal
elements, the press section nip pressure, the run model of the steam
box, the condition of the paper machine fabrics, the drying shrinkage
profile, and calendering are known to affect the porosity profile.
The scanning porosity measurement improves control over the grinding
phase, the wet end chemical dosage, the wire section vacuum, and
the calender. Optimal porosity also improves the coating result and
reduces consumable coating agent volumes. Furthermore, improved paper
machine control shortens grade change times, thus minimizing related
downtimes and waste.
Hardness Measuring Instrument for Paper Roll
- Hardness Profile Appears Immediately with Continuous Measuring
Nomura Shoji Co., Ltd.
Uniformity of hardness of paper roll is one
of important quality control indexes in the paper production. So
far there have been two
popular methods of checking the paper role hardness; one is to hit
the roll surface with a stick and to listen sound with ears -Hit
and Listen Method-, and another is to measure hardness with Schmidt
Hammer -SCHMIDT Hammer Method-.
The Hit and listen method relies completely
on personnel skill and its numerical analysis is impossible. Even
the Schmidt-hammer Method
is also dependable on personnel skill and experience, because accurate
measurement with Schmidt Hammer is not so easy and simple work. Measurement
and analysis with Schmidt Hammer Method is rather time-consuming.
Quality Profilerh, gPQPh for short, has been now launched from TAPIO
Technologies OY in Finland for most effective measurement
of the paper roll hardness.
The features of the RQP are continuous
measurement, immediate profile display, and accurate results independent
on personnel skill.
A Report on the 2nd International Symposium on
Technologies of Pulping, Papermaking and Biotechnology on Fiber Plants
The University of Tokyo
The 2nd International Symposium on Technologies
of Pulping, Papermaking and Biotechnology on Fiber Plants was held
in Nanjing, China on October
13-14, 2004 under the co-organization of Nanjing Forestry University
and Graduate School of Agricultural and Life Science, The University
of Tokyo. Total participants was 156 including 38 from outside of
China and 133 papers (44 oral and 89 poster) were presented.
Control System in a Paper Machine Accompanied by the Decoupling Controller
Pulp and Paper Research Laboratory, Oji Paper Co., Ltd.
Technology Division, Oji Paper Co., Ltd.
Yoshinobu Hara, Michiaki
Niahimura and Shirou Hirano
Kure Mill, Oji Paper Co., Ltd.
We introduced a retention control system
for the wet-end section of a paper machine using two intelligent
pulp and filler(ash) low
consistency sensors. When we tried to control the white water(WW)
total consistency by the retention aid dosage using the gProportional
plus Integral (PI) feedback controllerh, we experienced a strong
interaction with the existing paper ash content control of the QCS(Quality
Control System). To alleviate this interaction problem, we utilized
a gdecoupling controllerh together with the gPI feedback controllerh.
paper machine, wet-end section, retention control, interaction, PI
control (proportional plus integral control), decoupling control