Asphalt plant upgrade in Germany

An asphalt plant upgrade has helped boost long-term efficiency for a producer in southern Germany. The firm, Fiegl, based in Bavaria, invested in a new asphalt mixing plant four years ago. More recently, the firm also replaced the plant’s baghouse. The retrofit has since helped lower the plant’s emissions, noise output and fuel consumption. The time frame for the retrofit was tight because it was important to avoid lengthy downtime and production outages in mid-season. This meant that the changeover had to
May 8, 2019 Read time: 3 mins
A new baghouse has been added to the Ammann plant run by Fiegl, further boosting performance
An asphalt plant upgrade has helped boost long-term efficiency for a producer in southern Germany. The firm, Fiegl, based in Bavaria, invested in a new asphalt mixing plant four years ago. More recently, the firm also replaced the plant’s baghouse. The retrofit has since helped lower the plant’s emissions, noise output and fuel consumption.


The time frame for the retrofit was tight because it was important to avoid lengthy downtime and production outages in mid-season. This meant that the changeover had to be completed over a long weekend.

Work to dismantle the old baghouse system, which had been in operation for 20 years and the trial run for the new system started on the following Monday morning.

The firm now has a modern production plant that also ensures environmentally-friendly operation at its facility in Pleinfeld, Bavaria.

Fiegl has had its own facilities for producing asphalt for an extensive period – mainly to supply its own paving crews, but also to meet the needs of local customers. The company has two paving crews that operate within a 50km radius of its site.

The firm’s old asphalt mixing plant dated from the 1970s and was replaced in 2014 with a Universal 240 plant from 6791 Ammann. The new plant’s tower measures 35m high and allows Fiegl to produce up to 1,500tonnes of asphalt/day. The asphalt storage silo has a 240tonne capacity while the hot aggregate silo holds 120tonnes. Granular asphalt can be added as cold material via the elevator. Two buffer containers are also available for different grain sizes.

At the same time, the bitumen tanks were also brought into line with the latest technological standards. Two tanks were replaced and one was converted. Nowadays, all three are heated with electricity instead of oil. The filler silo was also replaced.

Coordination was the key factor that ensured progress. First and foremost, there was an installation planning session one week before work began. Everyone involved in the project gathered together on-site to discuss all possible eventualities. These included project managers, engineers, electricians, fitters, the customer’s staff in charge of the project, and the mixing engineers and staff from the crane company.


As well as reducing emission values, sound levels and energy requirements, the new baghouse system helps improve reliability.

The Ammatex filter bags have long service lifetimes. They are resistant to extreme temperatures and are impregnated with polytetrafluoroethylene (PTFE) as standard. The seams are also made of PTFE.

The filter bags eliminate the need to use fresh air flaps, so no additional air is required to clean the cloths. Thermosetting guarantees the dimensional stability of the filter bags. The type AFA 3089 baghouse plant in Pleinfeld can operate at a rate of 63,000Nm/h and is controlled via a frequency converter. The filter surface area is 1,045m2, more than sufficient to meet the environmental requirements for the operation of the asphalt mixing plant.

Materials

For more information on companies in this article

Related Content

  • Asphalt plant technology meets market needs
    February 16, 2012
    Plants for mixing asphalt are becoming more sophisticated than ever, while users are looking for ecological and technological benefits. Patrick Smith reports. When the Adige Bitumi Group decided to renew its old M 260 plant it chose to collaborate with Marini for the design and development of a plant with production of 280-300tonnes/hour.
    Read More
  • Asphalt plant innovations coming to the market
    April 20, 2018
    The use of recycled materials continues to be a key issue for asphalt plant development, but other advances are also being introduced to meet market needs - Mike Woof writes The asphalt plant market has been a focus for a series of technical developments in recent years. Warm asphalt solutions and new technology for the use of recycled asphalt have been high on the R&D priority list for manufacturers of both continuous and batching type plants. However, new developing technology is not the only driver f
    Read More
  • Multiple asphalt plants supply major highway construction
    July 12, 2012
    One company has produced eight asphalt plants for a major project, and others are introducing new models as Patrick Smith reports Algeria's US$11.2 billion East-West Highway development, the world's largest current highway construction project, forms part of the larger Trans-Maghreb Motorway project, and is scheduled for completion in 2010. It will run for 1,216km, ensuring the link between Annaba in the north-east and Tlemcen in the north-west, passing directly through 24 provinces and linking Algeria to T
    Read More
  • Asphalting in the Americas
    June 13, 2012
    Asphalt plants were recently delivered for use in the biggest road construction project in Latin America. Meanwhile, a US navy base has just received a plant Guy Woodford reports Spanning around 1,000km, the Ruta del Sol highway in Colombia is the largest road build works currently taking place in Latin America. Brazilian company Odebrecht, part of the Ruta del Sol Concessionaire group working on sector 2 of the highway stretching 528km from Puerto Salgar to San Roque, connecting the capital Bogota to the
    Read More

Highlighted Content