Integrated Gasification Combined Cycle

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The Integrated Gasification Combined Cycle (IGCC, German: Combined process with integrated gasification ) is a gas and steam process with upstream fuel gasification .

Procedure

Scheme of a combined process with integrated gasification

The primary fuel such as coal, biomass or waste is converted substoichiometrically ( λ approximately between 0.2 and 0.4) to high-energy fuel gas in a gasifier . The efficiency (cold gas efficiency) is around 80% with advanced system technology.

Examples of carburetors are the

The resulting raw gas is cooled and the waste heat from the exothermic gasification process is fed into the system's water-steam cycle . Then the raw gas is cleaned and passes through desulphurisation systems ( Rectisol process , Claus process , Selexol), filters and other units. At this point the gas is burned in a gas turbine , the combustion chamber being integrated into the turbine housing.

Alternatively, in addition to generating electricity from the synthesis gas , material products can also be generated, such as B. pure hydrogen, methanol, fuels or synthetic natural gas.

The waste heat is used to evaporate liquid in a secondary circuit. The steam itself is sent through a steam turbine and expanded. The residual heat can still be fed into a heat exchanger network (internal, etc.) The systems achieve efficiencies of up to 60% without and a fuel efficiency of up to 80% with waste heat utilization. For further technical details of the process after gasification see GuD .

In 1972 the first IGCC plant with the Lurgi gasification process was built and operated (Lünen, Germany). Others were added later, including Cool water Buggenum (Netherlands), Puertollano (Spain) and Wabash River and Tampa in the USA.

The first biomass-based IGCC plant (BIGCC) was set up and successfully operated in Värnamo (Sweden). However, the system was later converted for research purposes and BIGCC operations were discontinued. In 2006 a new BIGCC facility in Bahia (Brazil) was reported. In 2009 the first Chinese IGCC power plant is to be built in Tianjin .

In 2013 Edwardsport Power Station, the first large IGCC power plant, was successfully operated in Vigo Township, Knox County (United States).

Individual evidence

  1. ↑ Clean Coal Power (PDF file; 1.13 MB), p. 74.
  2. ↑ Lignite gasification ( Memento of the original from January 13, 2010 in the Internet Archive ) Info: The archive link was automatically inserted and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. . @1@ 2Template: Webachiv / IABot / www.energie-ffekten.de
  3. ↑ Dr. Peter Markewitz, Dr. Martin Robinius: Technology report 2.1 Central large power plants within the research project TF_Energiewende (PDF; 1.73 MB) Forschungszentrum Jülich . P. 13, 15 December 2017. Accessed 16 September 2019.

Web links