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Coal-feeding to pressurised fluidised bed processes has been identified as one area where capital and operating costs can be reduced, to make the economics of the processes more attractive. The research programme initiated to investigate this area includes the following phases: (i) literature and product survey; (ii) laboratory investigations; (iii) pump and slurry testing; (iv) cost and assessment studies. Design guidelines have been developed to enable coal-water mixtures to be manufactured and pumped into pressurised systems at water contents as low as 17% total moisture. The slurry preparation method requires the coal to be crushed and mixed with a slurry of froth flotation fines from a coal-preparation plant. The cost and assessment studies show this to be the most economic coal-feeding route available, in terms of the cost of electricity generated, by a pressurised fluidised bed combustion combined cycle power-generation plant.

Additional information

Authors: COAL RESEARCH ESTABLISHMENT, British Coal Corporation, Cheltenham (GB)
Bibliographic Reference: EUR 12820 EN (1990) 137 pp., FS, ECU 11.25
Availability: (2)
ISBN: ISBN 92-826-1506-5
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