Carbon Burnout Project - Coal Fineness Effects

Abstract:

This document is a report for the project titled 'Carbon Burnout Project - Coal Fineness Effects'.

Carbon-in-ash presents an obvious cost to coal-fired generation plant in terms of lost fuel. High levels of carbon-in-ash can also inhibit the efficiency of electrostatic precipitators, which in turn can lead to increased particulate emissions, while the potential for selling fly-ash is dependent upon the level of carbon in the ash and excessive levels can result in additional disposal costs.

The aim of DTI project 226 has been to establish good quality plant and rig data to demonstrate the effect of changing coal fineness on carbon burnout in a controlled manner, which can then be used to support computational fluid dynamics (CFD) and engineering models of the process. The project was designed to achieve this through:

The full scale plant trials were successfully completed at Powergen's Kingsnorth Power Station, establishing plant data that demonstrates the effect of changing coal fineness on carbon burnout in a controlled manner. A full set of tests were also completed on Powergen's CTF, operating with four different fuel grind sizes. During these tests both carbon-in-ash and NOX levels were seen to increase with increasing fuel particle size.

1. Introduction
2. Programme of Work
3. Discussion of Results
4. Conclusions
5. Future Work
6. Acknowledgements
7. References
8. Figures

Publication Year:

2004

Publisher:

Department of Trade and Industry

DOI:

No DOI minted

Author(s):

Colechin, M