A Publication on World Pulp, Paper & Allied Industry

October-December'2001

Tech Watch

   

Honeywell’s New Control Technology Unifies Process,
Machinery and Drives Control

The Industrial Control business of Honeywell [NYSE:HON] today announced its new PMD (Process, Machinery and Drives) process control solution at the PulPaper 2001 Exhibition in Helsinki, Finland. PMD unifies the control of the process, machinery and drives into a single system. Controls are implemented using the Honeywell Field Controller, which also connects various field networks as an integral part of the automation system. The newest release of Honeywell’s Alcont PMD system launched today is based on PMD technology

The new user interface for Alcont PMD takes full advantage of Honeywell’s HMIWeb™ techno-logy. Based entirely on Web technologies, the HMIWeb architecture uses HTML as the native display format, allowing the most open and direct integration of process, application and business information available. HMIWeb supports access to process graphic displays from either the secure process control environment or directly from Microsoft Internet Explorer for casual users without requiring functionality-reducing "exports" or "fat" plug-ins. HMIWeb provides a unique combination of Internet graphic-rendering technologies and secure, robust and high-performance information access. In addition, HMIWeb’s revolutionary architecture is positioned to directly leverage new Web technologies as they continue to develop.

The new system’s data communications are based on Fault Tolerant Ethernet, which brings optional redundancy to Ethernet solutions and provides data communication reliability to meet conventional, exacting process automation requirements. Ethernet technology also allows the automation system to be incorporated with the mill’s other information systems.

Ron Powell, Vice President Honeywell Finland Operations, said that the new PMD concept represents a significant change in conventional process control methods. "PMD enables control of all process components by a single system and integrates various field networks as a seamless part of the automation system. The new user interface supports and expands the use and distribution of data and information. As a result, users can expect to achieve more efficient process management, increased productivity, decreased equipment requirements and reduced costs."

Process, Machinery and Drives - All in One Single System
 

Until recently, machines and drives were controlled by stand-alone systems and seen as separate by operators and engineers. Now, the Field Controller’s unique processing capacity enables the integration of these elements with the process automation system. The user of the new system sees all process equipment in an identical fashion, which also simplifies maintenance work since equipment is reduced and becomes more uniform.

The Field Controller can control continuous and batch processes, high-speed machinery, stand-alone drives and line drives. Controller tools address conventional controls and logic, plus advanced control methods such as fuzzy logic, neural nets, statistical process control, multi-variable predictive control and optimization. Control functions are defined, tested and simulated by means of graphical tools, which are also used to define field network interfaces and the functions of devices connected to the field network. In addition, within this single, unified solution, a rich suite of standardized software applications allows the user to improve production and operating efficiencies.

The Field Controller Unifies the Field Network World

Currently, several field network standards are available in the market, each generated for a number of various needs. Until now, users have had to compromise, partly due to the connectivity restriction of automation systems’ field networks, and partly due to field network features.

The Field Controller provides a solution to these problems. The controller easily can connect to a wide variety of field networks. It currently interfaces to DeviceNet, Profibus, and Interbus standards, and the number of released standards will increase over time. Each Field Controller can be connected to two field networks that may be based on different standards. Multi-controller systems allow the connection of several field networks based on various standards, allowing optimum matching of the various field network properties with process control needs.

System functions, all process interfaces, and field network diagnostic and alarm data are displayed to process operators and application designers in an identical fashion, regardless of the field network in use. The diagnostic data items are channel-specific and enable efficient detection of field device faults, and the location of process malfunctions

A new generation of N-pumps
 
2000 saw the global launch of ITT Flygt’s new generation N-pumps, which are built around the award winning patented N-technology. 2001 will see the launch of two new models in the range. The pumps have been specially designed for more efficient, reliable and trouble-free pumping over long duty periods, than any other wastewater-handling submersible.

The breakthroughs achieved by the N-pump, since its launch, have led to new standards for pump requirements in the process and wastewater industry being taken under review. In light of this, the new generation N-pumps were launched, which not only include the patented N technology, with its self-cleaning impeller and sustained high efficiency, but also many other major innovations.

Many of the innovations have come following extensive surveys carried out by ITT Flygt. They revealed that customers prefer pumps that offer greater reliability, efficiency and ease of maintenance. The new generation N-pumps do just that.

The new motors have considerably reduced rotor losses, and heat generation is concentrated around the stator, which means less heat on the bearings. They also go through a new trickle impregnation process with resin, resulting in excellent insulation and less risk of air pockets in the winding.

A new internal closed cooling system enhances the operation of dry installed pumps. It is far more efficient than existing systems and the coolant is water and environmentally approved monopropylene glycol.


The pumps have an inspection chamber to collect possible leakage and thus avert damage to the bearings, and it is equipped with a sensor that trips an alarm when it is time for a service inspection.

The Plug-in™ seal unit provides a perfect fit and faster, simpler replacement. The design also protects the seal surface during disassembly and mounting. The pumps have a new look, they have a smoother and rounder exterior casing, which keeps them cleaner, and they have fewer screws, making it easier to disassemble and reassemble them. Spin-out™, ITT Flygt’s patented seal wear protection, protects the outer seal in the pumps by expelling abrasive particles from the seal chamber, and a patent pending impeller fastener makes the task of removing, trimming and mounting the impeller much simpler and faster. 
All these new innovations in the pumps equals improved reliability, sustained high efficiency, and easier service. The new models to be launched this year are 3171 and 3202, which range from 13-45kW and have a capacity of up to 450 I/s.

Latest developments from KWI were
 
The KS-Filter from KWI is a continuous backwashing sandfilter designed utilising well proven technology. Used for raw water and tertiary effluent treatment in the paper mill, and manufactured to the most exacting standards, it is built predominantly from corrosion resistant stainless steel. Having no moving parts, the KS-Filter is practically maintenance free and requires minimum installation. Plants are already in operation in Denmark and a pilot plant, shown graphically on the stand, is now available to hire for customer trials.
The Megacell™ clarifier from KWI is a state-of-the-art clarifier containing a patented double lamella system which provides both co-current and counter current clarification within the same unit. This double flotation gives greater efficiency and hence reduced size.
Operating at an extremely high hydraulic loading rate, the Megacell™ can be sized for flows of 10 - 800 m3/hr. of general paper mill effluent, deinking wash water and paper machine white water, it also copes effectively with pulp mill process water and effluent. Even the largest size can be installed in relatively confined spaces and for even smaller sites a vertical design is now available.

KWI’s well established Maxidaf™ (formerly Supracell) and Daffilter™(formerly Sandfloat) range of DAF clarifiers continue to be marketed as does the relatively new Jetfilter™, a totally revised fibre recovery and fractionation system.

KWI group companies employ over 200 people world-wide and have incorporated offices in 14 countries with representation through agents or representatives in 60

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