Energy for tomorrow : division 2 energy and the environment = energie demain. Advances in the combustion of fossil fuels. World Energy Conference [14, 17-22 Sep. 1989, Montreal].

Allen, J.W.

1989

CIENA
525

Recent advances in the combustion of fossil fuels have been made as a result of increasing worlwide pressures for control of emissions to the atmosphere, particulary from powerstation boilers. Modification to combustion system design and methods of operating have enable significant reductions in the emissions of nitrogen oxides (NOx). The techniques involve the staging of both the combustion air and fuel to modify flame temperatures and in flame mixing processes wich determine the emission levels. Chemical injection into the combustion system has been suggsted both as a means of NOx and also sulphur dioxide (SOx) emission reduction. SOx emission cannot be controlled by combustion modification. Increased efficiency processes involving fluidized bed combustion in combined cycle operations offer in addition NOx and SOx control some short-term control on the emission of carbon dioxide and its subsequent role in the greenhouse effect. Typical designs and operation of low (NOx) emission burners are discussed in the context of power station boiler operation and an attempt to assess the ultimate level of NOx reduction by combustion modification is made. Fluctuations in world fuel prices have stimulate the search for alternatives or modifications to the prime fossil fuel used in power generation. Recent developments in the utilisation of coal liquid mixtures and heavy hydrocarbon emulsion fuels are discussed in this context. To further the understanding of the modifie combustion process and increasing use is being made of mathematical modelling.. INTRODUCTION. BURNER DESIGN. BURNER SYSTEM OPERATION. EFFECT OF BURNER DESIGN AND OPERATION ON ULTIMATE NOx EMISSION LEVELS. SULPHUR CONTROL. DYNAMIC AND STATIC BED COMBUSTORS. ALTERNATIVE FUELS. PREDICTION AND MEASUREMENT OF COMBUSTION SYSTEM PERFORMANCE. CONCLUSIONS. ABSTRACT. BIBLIOGRAPHY. REFERENCES.

Presenta gráfs. y diagrs.

GENERAL; COMBUSTION; COMBUSTIBLES FOSILES;