Research on Tangential Firing of Anthracite in Large Capacity Station Boilers

Anthracite is characterized by a low volatile content,high heating value and highignition temperature.The main problems met with in firing are: hard to ignite,low combustion efficiency,liable to furnace slagging and high NO_x emission.Since,in certain regions of China,anthracite is used as a fuel for power generation,the main points focused on in the design of a power plant boiler firing anthracite are;ignition,stable combustion,ways of raising combustion efficiency, prevention of furnace slagging and reduction of NO_x emission.Main ways of combusting anthracite and design principles of applying the tangential firing technique in large boilers burning anthracite are here explained,with a final introduction to design features and operational results of the 300 MW natural circulation,tangentially fired anthracite boiler,designed by Shanghai Boiler Works,accompanied by a discussion of envisioned prospects of applying anthracite firing techniques on 600 MW boilers.Figs 3,tables 4 and refs 9.