Page 41 - Hub-4 Magazine issue 68

Asphalt & Bitumen
In developing the ideal solution, Benninghoven relies on swarm intelligence – or in concrete terms, on the expertise of the entire Technical Office paired with the experience of the fitters on site. This is because the Benninghoven Technical Office is practised in getting more performance out of old technology and above all also in adapting existing technical components to suit new ones. “We look at the old components on site; these tell us what we need to take into account and what needs improving,” says Jörg Genetsch. Once the design process is complete, the engineers prepare technical specifications and layout drawings.
Presentation and agreement with the customer team
The Wirtgen Group team presents this entire technical solution to customer representatives and discusses it with them until the project is approved. “Right back at the project planning stage, it was clear that the Benninghoven professionals know what they are talking about. Their expertise is considerable, so we felt we were getting good advice and were in good hands right from the outset,” says Karl Weiss, mixing plant supervisor at the Guggenberger GmbH asphalt mixing plant in Mintraching.
Implementation of the new technology on site
Once the retrofit plan and all the new components have been approved, they are made in the main Benninghoven factory and transported to the job site. The customer’s plant staff and Benninghoven service technicians often form a team, as was the case in the Mintraching retrofit project. “And it works so well!” says Thorsten Neidhöfer, one of the Benninghoven fitters on site.
New higher-performance EVO JET 3 triple-fuel burner
Modern Benninghoven technology was integrated in the existing asphalt mixing plant which will allow the plant to operate in an economical and environmentally friendly way for years. The heart of this equipment is made up of the burner and the dryer drum. With oil, liquid gas and coal dust, the new EVO JET 3 burner can now fire three fuels instead of two, which will make Guggenberger more independent of fluctuating energy costs in future. A new coal dust dosing system has been fitted for this fuel; its overhauled design will bring key benefits for Guggenberger in terms of functionality, safety and fuel consumption. What is more, the burner is designed for higher performance and thus contributes to increasing plant performance as a whole. Drying performance increases significantly, especially in the production of mixes such as stone mastic and mastic asphalts which are made entirely from white mineral – in numerical terms, performance increases from 140 t/h to 190 t/h.
Individual customer solutions: customized retrofit components are made at the main Benninghoven factory.
Video “Retrofit dryer drum”: www.wirtgen-group.com/retrofit-trockentrommel-benninghoven
www.hub-4.com May-June 21 - Issue 68
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