The problems such as high carbon content of fly ash,frequent fluctuation of return fluidized air pressure,serious wear of the separator target area and deformation of the center cylinder in the operation and maintenance of a circulating fluidized bed boiler cyclone separator of 350 MW unit are analyzed.In order to deal with the problems,some measures are proposed,such as strengthening the center cylinder,shrinking the center cylinder,increasing the flow section of the inlet horizontal flue,adding the automatic ash re-moval device of the inlet horizontal flue,reaming local air cap of the return valve and so on.The operation results after transformation show that the bed temperature is reduced by 18～30 ℃,eparator pressure drop increases by 200 Pa,the carbon content of fly ash is re-duced by about 1.1％,and the separator efficiency has been significantly improved.Moreover,the problems of castable wear in the tar-get area and the deformation of the center cylinder have also been eliminated.
关键词
循环流化床/旋风分离器/靶区磨损/中心筒变形
Key words
circulating fluidized bed/cyclone separator/target area wear/center cylinder deformation
维普
万方数据