Applying the new technique of rich oxygen burning,improving and saving energy,discusses the advantages of the technique of rich oxygen burning at present, by elevating the furnace temperature, decreasing smoke heat loss, and avoiding the atmosphere pollution from nitrogen,also points out the way when disposing the hot side of boiler, and put forward the new way of new boiler product development.

Through simulating the influence of various ratio of primary and secondary air,position of upperlevel secondary air,coefficient of excess air,upon furnace temperature of the CFB boiler,and distribution of SO_2 and NO_x emission,the reasonable optimality of operational parameters has been a.

With increased rear-arch and used high temperature and pressure steam as the secondary air,the furnace temperature and combustion efficiency was increased and the carbon particle s staying in furnace was also prolonged in addition to a good economic and social benefit.

The methods to moniter and control furnace exit temperature in the light of the important influence of furnace exit temperature in power plant which is seeental to the safty,economy,dependability and pollutatnts emission reduce of boiler operation and boiler seivice life prolonging is proposed.