Experimental Study on Effects of Pulverizer Outlet Temperature on Boiler Combustion and Economy

Fuxing Cui, Xuhui Zhang, Haichao Wang
2018 Proceedings of the 2nd International Conference on Material Science, Energy and Environmental Engineering (MSEEE 2018)   unpublished
In order to obtain the effects on boiler operation when pulverize outlet temperature changes, testing on a 300MW power plant. The results illustrate that when pulverize outlet temperature rised form 70℃ to 94℃, temperature of gas center 0.4meter、0.5meter and 0.6meter apart from A2 burner all rised, temperature of gas center 0.4meter apart from burner rised fast form 538℃ to 820℃,unburned carbon in fly dust decreased from 2.4% to 1.7%, unburned carbon in slag decreased from 3.3% to 2.3%, average
more » ... 3% to 2.3%, average temperature located A burner cross section; C burner cross section; E burner cross section all rised, and boiler thermal efficiency rised from 92.35% to 92.94%,net coal consumption decreased approximately 2.02g/kW▪h. A power plant boiler, the SG-1025/17.5-M881 single furnace, control cycle, one intermediate reheat pulverized coal furnace, tangential combustion, solid slagging, open-air structure subcritical parameter drum boiler, is produced by Shanghai Boiler Factory Co., Ltd.,. The boiler is equipped with 5 MPS coal pulverizers, which adopts the medium-speed coal pulverizer direct-blowing pulverizing system, and the five-layer primary air nozzle is arranged, of which the four-layer operation can carry the BMCR. The combustor arrangement is shown in Figure 1 . The boiler adopts 48
doi:10.2991/mseee-18.2018.9 fatcat:fxk5huewlfexhms4czre7wrvzy