Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Efficient generation of power from finely chopped material

29.06.2009
Trial operation of the biomass heating and power station in Böblingen, Germany completed successfully

The new biomass heating and power station of the Zweckverband Restmüllheizkraftwerk Böblingen (RBB) in the German Land of Baden-Württemberg has now started regular operations, using finely chopped material to generate energy in a manner which is most compatible with protection of the environment.


The biomass heating and power station of the Zweckverband Restmüllheizkraftwerk Böblingen

After starting in February, trials were completed successfully at the beginning of May when the performance test was carried out. The Siemens Industry Solutions Division supplied a Reject Power installation for the heating and power station. The Reject Power system also enables the use of fuels with a high water content such as screenings from wood-chip processing.

The new biomass heating and power station supplies electrical energy for around 5,200 people. At the same time, the heat produced can be fed into the district heating network. Compared to the use of fossil fuels for the generation of electricity and heat, CO2 emissions are reduced by 10,200 metric tons per year.

The new biomass heating and power station of RBB supplements existing facilities for the thermal exploitation of residual materials.

With the help of the Reject Power system for power generation, around 20,000 metric tons of finely chopped material that it would not be possible to incinerate in conventional facilities can be utilized every year. The finely chopped material consists of natural-wood screenings that are produced when green waste, residual wood from forests and wood left over from landscape conservation, for example, are cut up into small chips. “This facility is new territory for us”, explained Wolf Eisenmann, managing director of RBB. “For the first time in Germany, we are producing electricity and heat from finely chopped material.” We decided in favor of the Reject Power concept from Siemens, continued Eisenmann, because an Austrian paper manufacturer had already achieved very promising results with this special incineration technique.

The Reject Power installation supplied by Siemens for the biomass heating and power station consists of the combustion chamber, the waste heat boiler, a flue gas cleaning unit and the chimney as well as the electrical equipment. The heart of the system is a spinning wheel, which throws the fine wood screenings into the combustion chamber at high speed, ensures better distribution of the heterogeneous combustion material and thus guarantees complete incineration. At a temperature of up to 950 degrees Celsius, the combustion chamber converts the screenings into usable energy. With the help of the spinning wheel method, fuels with a high water content can also be used.

The Reject Power installation is designed for the thermal conversion of around 20,000 metric tons of screenings. It produces 6.4 metric tons of steam per hour with a pressure of 40 bars and a temperature of 390 degrees Celsius. A steam turbine uses the steam to generate electrical energy and provide heat for the district heating network. A power generator with an output of 700 kilowatts supplies the public grid of the community, thus supplying approximately 5,200 people with electricity. The heat is fed into the district heating network via a district heat exchanger. Due to the combination of power and heat that is produced, a fuel utilization ratio of around 80 per cent is achieved.

The Siemens Industry Sector (Erlangen, Germany) is the world's leading supplier of production, transportation, building and lighting technologies. With integrated automation technologies as well as comprehensive industry-specific solutions, Siemens increases the productivity, efficiency and flexibility of its customers in the fields of industry and infrastructure. The Sector consists of six Divisions: Building Technologies, Drive Technologies, Industry Automation, Industry Solutions, Mobility and Osram. With around 222,000 employees worldwide Siemens Industry posted in fiscal year 2008 a profit of EUR3.86 billion with revenues totaling EUR38 billion. www.siemens.com/industry

With the business activities of Siemens VAI Metals Technologies, (Linz, Austria), Siemens Water Technologies (Warrendale, Pa., U.S.A.), and Industrial Technologies, (Erlangen, Germany), the Siemens Industry Solutions Division (Erlangen, Germany) is one of the world's leading solution and service providers for industrial and infrastructure facilities. Using its own products, systems and process technologies, Industry Solutions develops and builds plants for end customers, commissions them and provides support during their entire life cycle. With around 31,000 employees worldwide Siemens Industry Solutions achieved an order intake of EUR 8.415 billon in fiscal year 2008.

Rainer Schulze | Siemens Energy
Further information:
http://www.siemens.at/reject-power
http://www.industry.siemens.com/data/presse/pics/IIS200906749.jpg
http://www.siemens.com/industry-solutions

More articles from Power and Electrical Engineering:

nachricht Researchers pave the way for ionotronic nanodevices
23.02.2017 | Aalto University

nachricht Microhotplates for a smart gas sensor
22.02.2017 | Toyohashi University of Technology

All articles from Power and Electrical Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Stingless bees have their nests protected by soldiers

24.02.2017 | Life Sciences

New risk factors for anxiety disorders

24.02.2017 | Life Sciences

MWC 2017: 5G Capital Berlin

24.02.2017 | Trade Fair News

VideoLinks
B2B-VideoLinks
More VideoLinks >>>