Pulp Paper & Logistics
ABB 27 During the annual summer shut-
down at Stoneywood in July 2011 the PM10 was stopped to enable dry testing, followed by wet testing which was completed on a Sunday at the end of month. The next morning, 1 August,
Paper technician at Arjowiggins’ PM10 line Martin Mapplebeck views its performance in real time using ABB systems
of manufacturers: Fisher ac2 (circa 1970s), Turnbull Control Systems (TCS, and eventually part of Eurotherm) were also late-1980s technology. There were two distinct models of single-loop controllers and eight- loop controllers. On top of this there were a few field-mounted controllers plus Refiner KW controllers, all dating from the mid-1990s. It was decided to replace all of
these systems and in addition install slice lip profile actuators (to replace the manually-set ones) plus remove all Start/Stop buttons for the wet end pumps and the like. Working with ABB on the
project was the continuation of a long history of collaboration between the Stoneywood Mill and Accuray/Combustion Eng/ ABB since the mid 1970s. Most recent was the successful installation of an 800xA system on the mill’s PM08 line in 2009. Work on the latest project
started in the spring of 2010 with Tom and Neil Gordon, of Process Instrumentation Ltd, carrying out preparatory work and then
producing a User Requirement Specification (URS) with input from the mill production team, utilising their extensive knowledge of the older system’s functionality. “The content and quality of this URS enabled the ABB project engineers to programme and configure the control system functions to a high degree of accuracy and ensure an efficient Factory Acceptance Test (FAT). The order was raised in December 2010,” said Cowdroy. With ABB starting work at its Dundalk base in Ireland, pre- installation at Stoneywood included remote I/O panel building, installation of trunking and cabling, re-housing crew’s ‘bothy’ to enable the old one to be re-built as a wet end control room and ABB rack room, all of which was carried out between January and June 2011. At Dundalk, the QCS Factory Acceptance Test (FAT) was completed in May 2011 by ABB Project Manager Nick Evans and QCS expert Jim Matthews, all under the supervision of Niall Gairdner from the mill’s Process
Control Department. Next stage was the DCS FAT which took place at Stoneywood at the end of June 2011 along with ABB representative Lucas Hedl, again led by Gairdner
stock tests took until lunch time as steam from the boiler house was raised and at 2pm a sheet went through the machine for commissioning of the drying control loops. By 6pm saleable paper was being produced. The machine ran all night on the same grade and from 8am the next morning the second tuning of other grades began with colour control following a few days later, but ahead of schedule. Another reason for working with ABB was the size of the scanner. Originally, ABB had suggested a direct replacement of an earlier ‘C’ frame for a later version. With very little space before the
4
The £1m QCS/DCS project at Arjowiggins was signed off successfully in May 2012
September 2012
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