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There is a worldwide trend in heat and steam generation towards the replacement of high-grade fuels with fuels which have no other applications, such as anthracite and crude brown coals. In this context the combustion of flotation sludge is of particular interest. Within the Deutsche Babcock Group, work has been going on for a long time into combustion systems suitable also for low-grade and critical fuels. From the operational experience gained in such plants the Deutsche Babcock Group has been able to develop fluidised bed combustion intensively. Now over 150,000 hours of operational experience have accrued in Babcock plants employing fluidised bed combustion. 1,250 MW of thermal power output have been installed. It is against this background that Deutsche Babcock Werke AG has created a fluidised bed steam generation concept for the environmentally friendly combustion of coal - the CIRCOFLUID system. In order to assess the suitability of fluidised bed combustion - in particular the CIRCOFLUID system - for problematic fuels, a series of tests was carried out on an anthracite very low in volatile components, a very fine-grained crude brown coal and a residue from hard coal flotation with low calorific value and very high ballast content. This final report contains the results of these tests.

Additional information

Authors: WAGNER R, Deutsche Babcock Werke AG, Oberhausen (DE)
Bibliographic Reference: EUR 12733 DE (1990) 47 pp., MF, ECU 4
Availability: (2)
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