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 Silicon solar cell of ISFH yields 25% efficiency with passivating POLO contacts
08.12.2016 | Institut für Solarenergieforschung GmbH

nachricht Robot on demand: Mobile machining of aircraft components with high precision
06.12.2016 | Fraunhofer IFAM

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: Electron highway inside crystal

Physicists of the University of Würzburg have made an astonishing discovery in a specific type of topological insulators. The effect is due to the structure of the materials used. The researchers have now published their work in the journal Science.

Topological insulators are currently the hot topic in physics according to the newspaper Neue Zürcher Zeitung. Only a few weeks ago, their importance was...

Im Focus: Significantly more productivity in USP lasers

In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.

Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...

Im Focus: Shape matters when light meets atom

Mapping the interaction of a single atom with a single photon may inform design of quantum devices

Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

Researchers identify potentially druggable mutant p53 proteins that promote cancer growth

09.12.2016 | Life Sciences

Scientists produce a new roadmap for guiding development & conservation in the Amazon

09.12.2016 | Ecology, The Environment and Conservation

Satellites, airport visibility readings shed light on troops' exposure to air pollution

09.12.2016 | Health and Medicine

VideoLinks
B2B-VideoLinks
More VideoLinks >>>