Advanced atomiser development for coal water slurry combustion
The performance of coal water slurry burners has been successfully tested in large-scale operations, such as power generation. They have achieved only limited success in smaller applications, due to problems caused by lower flame temperatures, especially at turndown, where supplementary fuel may be required to ensure continuous combustion. Small industrial and shell boilers are very well suited for conversion from oil to coal water slurry firing, due to their size. A better understanding of the atomisation and heat transfer to the fuel particles in the region local to the burner tip could lead to the development of burners which would make the economics of conversion attractive to a wider range of users. A programme of work was completed which used both analytical and experimental techniques to examine atomiser performance, the interaction of the fuel particles with the turbulence and mixing in the combustion air stream, and the heat transfer in the fuel dryout region. A twin register burner design, using a coal water mixture fuel, was successfully fired in a test facility, representing a typical combustion chamber found in small industrial and shell boilers.
Bibliographic Reference: EUR 13450 EN (1991) 24 pp., MF, ECU 4
Record Number: 199110341 / Last updated on: 1994-12-02
Original language: en
Available languages: en