Performance Analysis And Reform Of OP130/110 Boiler

The OP 130/110 boiler in 803 power plant was primarily built in 1965,and has served for over 30 years till now. Now it needs tech-alteration badly to improve its performance because it has greatly deviated from its designed target.This article aims at the boiler's problems in operation: 1) Under nominal load,the smoke temperature at the outlet of hearth reaches 1200 ℃,far more exceeds 1050℃ the original designed temperature.This will always result in slag inside boiler and the temperature of overheater's pipe superheat, so that boiler cannot take nominal load and all these influence boiler's nomal operation heavily,2)This article also studied the reason why the assistant oil becoming necessary when coal changes.During the nomal operation,many factors(makeup of combustor and its disposal,smirch and encrust of water wall,excessive air coefficient,temperature of primary air,coal type and density of coal dust) can deviate the designed working conditions,then affect the boiler's nomal operation.The experimentation of cool and hot diagnosis reflected the structure and disposal of combustor, slag bonding and smirch of hearth are the main factors of hearth's outlet overheat and output of boiler decline.On the basis of annlyzing the main domestic cocurrent combustor,we adopted the up and down-shade-technology to reform the combustonAfter researching the characteristics of main coal and its affecting factors,i.e.,density of coal dust,granularity of coal dust,firing characteristics,alteration of coal,we put forward the scheme of coal's configuration and reforming plan about structure of combustor and its disposal type.Finally,we make a debugging of cool and hot performance and operation optimizing.After appropriate reform measures were taken, the slagging and gas temperature deviation problemes have been completely solved. The boiler efficiency was raised by 2 percentage points and the boiler's safety and economics effect got improved.