论文部分内容阅读
以煤为原料的火力发电厂和工业锅炉房根据大气污染排放要求,都装设了不同类型的除尘器。由于所用的燃煤品种不同,锅炉结构和燃烧方式差异,以及除尘器的除尘效果优劣等因素,烟气携带的飞灰颗粒对引风机都有不同程度的磨损。国产系列引风机虽然已考虑了风机的磨损因素,出厂的引风机,其转子叶片加厚,叶片与园盘焊接根部加强;引风机锅壳的锅板加厚。但即使是这样的引风机,一般也只能运行6～9个月。磨损最严重的部位是工作叶轮的叶片和连接叶片的园盘;外壳部分则是锅壳,进风箱和进风喇叭口,其次则是异向叶片。磨损后的常用修补办法,一般是用金属更换损坏的部分或补焊磨损部分。为了避免引风机磨损,
Coal-fired power plants and industrial boiler rooms are equipped with different types of precipitators according to the air pollution emission requirements. Due to the different types of coal used, the difference of boiler structure and combustion mode, and the advantages and disadvantages of the dust removal effect of the dust remover, the fly ash particles carried by the flue gas have different degrees of wear on the draft fan. Domestic series induced draft fan has taken into account the fan wear factor, the factory draft fan, the rotor blades thicker, blade and garden welding root reinforcement; induced draft fan boilers pot thickening. However, even such an induced draft fan can only run for 6 to 9 months in general. The most worn parts are the blades of the working impeller and the disk attached to the blades; the shell part is the shell, the inlet bellows and the inlet bell, followed by the isolating blades. Common repair methods after wear, the general replacement of damaged parts with metal or welding wear parts. In order to avoid induced draft fan wear,