Carbon Burnout - Coal Fineness Effects: Project Profile

Abstract:

<p>It is generally accepted that improvements in coal particle size distribution are beneficial to carbon burnout, and considerable emphasis is placed on the optimisation and maintenance of coal pulverising equipment at utility power plant. The modelling of carbon burnout has been the subject of a number of recent and ongoing projects, some of which have received the financial support of the DTI, and significant technical advances have been made. However, there is an absence of available plant data to demonstrate the effect of coal particle size distribution on carbon in ash, which would allow the validation of this aspect of CFD and engineering models of burnout. This project seeks to address the shortfall.</p> <p>The overall aim of the project is to establish good quality plant data to demonstrate the effect of changing coal fineness in a controlled way. Specific objectives are: <bl> <li>To obtain full scale plant data on the impact of coal particle size on carbon in dust and NOx formation</li> <li>To obtain data on the impact of coal particle size and coal quality on carbon in dust and NOx formation by means of combustion trials on a 1 MWth single burner combustion test facility</li> <li>To provide coal and flyash samples for detailed laboratory testing and analysis, to establish whether there are differences in the nature of the flyashes arising as a result of the extent of grinding</li> <li>To analyse the data arising with the engineering model being developed under the auspices of the 'Improvement in Combustion Efficiency in Utility Boilers - DTI Project No. 139' and thereby to validate its ability to predict the effects of coal size distribution</li> <li>To undertake CFD modelling of the plant tests to establish the validity of this modelling approach (building upon the work undertaken previously in the earlier DTI sponsored project)</li> </bl></br></p> This profile contains information on the project's: <bl> <li>Objectives</li> <li>Summary</li> <li>Cost</li> <li>Duration</li> <li>Contractor</li> </bl>

Author(s):

DTI