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火电机组布袋除尘器的除尘原理及灰斗制作要求

发布时间:2019-03-31
​近年来,对火电厂烟气排放的标准要求越来越高,其中烟气中的粉尘浓度就是一项重要的指..

近年来,对火电厂烟气排放的标准要求越来越高,其中烟气中的粉尘浓度就是一项重要的指标。电厂烟气除尘的方式主要有静电除尘和布袋除尘两种,其中布袋除尘器是目前应用较为广泛的一种方式。相比于静电除尘,布袋除尘器有结构简单、设备可用性强、除尘效率高等诸多优点。但是,在布袋除尘器工作期间,影响其使用寿命的因素较多,如果不能对其进行很好的维护和管理,就会降低布袋除尘器的使用寿命,进而在给机组运行带来隐患的同时,也会增加除尘器的维护成本。因此,加强对布袋除尘器维护和管理,并且提高其使用寿命对电厂的经济运行具有重要的现实意义。

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1锅炉布袋除尘器灰斗及排灰口的设计,应保证灰能自由流动排出灰斗。灰斗设计应尽量避免烟气短路和二次扬尘。斗壁与水平交角不小于60°,相邻壁交角的内侧,应做成圆弧形,圆角半径不小于200mm,以保证灰尘自由流动。

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