The development of fluidised combustion of coal from small-scale laboratory experiments in the early 1960's to the present day, when the first commercial applications are being designed and constructed, is described, concentrating on the contributions made by the National Coal Board and others in the United Kingdom. It is shown that significant efforts are being made to exploit this technology both in the UK and overseas. The potential advantages of fluidised combustion which justify these efforts are described, and examples are given to illustrate the engineering features of boiler plant fired by the fluidised combustion system, and some of the design problems the designer needs to overcome.
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