Paper Technology Journal 19 - Voith

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20 Ewald Budweiser Paper Machines Graphic ewald.budweiser@voith.com Manfred Dreuse Fiber Systems manfred.dreuse@voith.com 19/05 Maxau PM 6 – A challenging project and its implementation In March 2003, Stora Enso placed an order with Voith Paper for the replacement of Voith PM No. 850 supplied in 1968 with a high-capacity paper machine for magazine papers. 2 The project To dismantle a complete paper machine including the peripheral machine sections in an extremely short rebuild time and hand it back to the production process requires an enormous effort in planning as well as good organization in the dismantling/installation phase, as well as during start-up. Our customer set ambitious goals for this project: ● Doubling annual production to 260,000 t (plus further expansion reserves) ● Increasing the trim width by 300 mm to 7,200 mm ● Fitting the new PM into the existing building
● Project duration max. 18 months ● Shutdown time max. 65 days, incl. the extensive civil engineering work. The project developed, based on these targets, from the first day on into a superlative for design, planning and logistics. Voith was able to convince the customer in the project phase that this could only be achieved by minimizing the interfaces, i.e. by Voith Paper supplying all the equipment and taking overall responsibility. The order covered not only the paper machine based on the proven One Platform Concept with DuoCentri- 1 NipcoFlex Press and Online Janus Calender, but also all auxiliaries, the approach flow system including broke pulper as well as the complete production line engineering. As part of the Process Line Package (PLP), the scope of supply also covered the process pumps, tanks, piping and air system equipment as well as the entire installation work, start-up and personnel training. Project handling Cramped space conditions and the linkage of the process piping and wiring with paper machines 7 and 8 that have grown over the years rendered the implementation of the rebuild activities difficult. During the planning phase further basic knowledge of the extent of the construction work to be carried out in the peripheral system became transparent. This necessary civil engineering work required detailed progress and deadline schedules. Optimal implementation of the activities between civil engineering and mechanical engineering was required to meet the time frame. When the old PM was shut down on July 2, 2004, a meticulously planned rebuild action began. The first machine parts in the wet end had hardly been dismantled when the civil engineering work began with excavators lifted in through the roof to demolish almost the complete machine framing. The dismantling of the cabling, which has grown over the decades, had to be prepared in tricky detailed work. Tracing of Fig. 1: Maxau PM 6. Fig. 2: Schematic of Maxau PM 6. Fig. 3: Wire change. 21 cable routes, existing dead cables, identifying the cables and safety-conscious dismantling of the cables called for months of preparation work. The result was extremely positive. Neither of the two paper machines still running was stopped, and the safety requirements were all met. The reel section with Sirius reel and Janus calender were already installed when the construction workers were still working on the wet-end foundations. At times more than 1,300 erectors, civil engineering workers, electricians, pipe layers, etc., were performing the impossible on a daily basis in cramped space conditions: punctually on August 31, 2004 the main part of the installation work was finished and the start-up team could begin with the check-outs. 19/05 3
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Page 27 and 28: 1 Within a short time, UPM Shotton
Page 29 and 30: The project goals of 2.15 km 2 /m/d
Page 31 and 32: 2 3 Gelder says: “Our PM 2 is now
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Page 57 and 58: 4 Stock buffer Water buffer Before
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Mondi Paper, Merebank, South Africa
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Paper Technology Journal 19 - Voith

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