PROJECT OF THE MONTH | APRIL 2021


“The new supply would significantly


reduce UPM Hürth’s CO2 footprint. The project supports the long-term phase- out of coal-fired power generation in Germany”, said Winfried Schaur, executive VP, UPM Communication Papers. “The new plant ensures a stable and economically predictable supply of heat to the site and would make our production cycle in Hürth, which is already based on 100% recovered paper, even more sustainable.” The location has been well selected, because the paper production operation needs a lot of heat (in the form of steam) and combined heat and power generation is particularly efficient. In this case, it is also sustainable, since the power plant is fuelled by wood residues, which E.ON procures in the region. According to E.ON, this will provide an efficient and reliable supply of virtually CO2-neutral energy to an industrial operation that requires a lot of energy. Both companies are already


cooperating at UPM’s site in Plattling, Bavaria. E.ON supplies the paper mill there with a highly efficient gas and steam power plant. E.ON also operates industrial-scale biomass power plants in the UK and Sweden. “Together with UPM, we will demonstrate it is possible to supply an energy-intensive industrial company with an economical and reliable CO2-neutral energy supply. We will be contributing our experience and mature technology to the partnership. UPM and E.ON will set an example of climate-friendly energy supply for the industry that goes far beyond the paper industry,” said Karsten Wildberger, board member, E.ON. Demag will deliver two process cranes


for the automated continuous supply of wood to fire the boiler in the power plant. Some 45 tons of wood need to be fed around the clock every hour. The two double-girder cranes, which have a load capacity of 14 tonnes and a span of 20.6 meters, will travel on a crane runway measuring almost 100 meters in length. All of the crane travel drives feature variable speeds and energy recovery when braking and lowering loads, which enhances the energy efficiency of the cranes. Hydraulic multi-jaw grabs with a capacity of 12m³ will be used as load handling attachments. The crane systems will largely


operate in automatic mode. The Demag Warehouse Management System (WMS)


R Demag cranes will supply wood to fire the boiler in the power plant.


software will ensure, for example, that the bunkers are cleared, the boiler is continuously fed with the required quantities of wood and that both cranes complete their co-ordinated tasks. Not only the fuel, but also the ash as


a residual material is being handled by a Demag crane. The Demag engineers have specified a smaller double-girder process crane with a 5.4-tonne load capacity and a hydraulic grab for this task. The three crane systems will operate


under challenging conditions with high humidity (up to 100%) and high dust levels. They are ideally suited to meet these requirements, as Demag has already designed and delivered many cranes for refuse recycling installations and other similar biomass power plants all over the world. Since it is very difficult to view the


entire extremely long fuel bunker from a conventional crane cab, the project engineers at E.ON decided in favour of a special Demag option. If the cranes need to be operated under classic manual


control, this can be done via a Remote Operating Station (ROS), which also serves as a monitoring station when the cranes are running in automatic mode. ROS is a remote control station that includes all operating functions of a process crane with a crane operator seat – except that the operator does not view the crane and its operating environment direct, but via a widescreen monitor that shows images from several cameras in real time. The screen layout can be configured to meet process requirements, with information relevant to the process being automatically displayed. In theory, a station like this can be


located very far from the crane. At the Hürth biomass power plant, it is installed in the control centre, so the operator can benefit from improved working conditions. Thanks to the many installed cameras, he has an even better view of the process than from a crane cab. This is because the cameras can also “look” where the normal field of vision would otherwise be restricted. ●


www.hoistmagazine.com | April 2021 | 11


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