一木棋牌

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河北康鸣环保设备有限公司
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  • 对袋式除尘器造成影响的主要因素

    发布日期:2019-08-26 发布者:康鸣环保

    1滤袋的透气效果

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    从脉冲阀喷吹的压缩空气压力就叫做喷吹压力。喷吹压力越高,诱导出来的二次气流越多,反吹气流速度比较大,就会   比较不错的清灰效果,除尘器压降也会随之降低。在对脉冲布袋除尘器压降情况进行限定时,也可以有比较强的处理能力。如果喷吹压力过大,就会出现过度清灰的情况,会对过滤效率造成影响,袋式除尘器会出现瞬间冒灰的情况,增加耗气量,对能源造成浪费,因此过高或者过低的喷吹压力都会对清灰效果造成影响。和低压脉冲清灰相比,高压脉冲清灰优点并不明显,在清灰过程中,无法将清灰压力全部作用到滤袋上,滤袋无法直接承受高压气流的冲击,多数压缩空气压力在系统自身的阻力克服上进行消耗。经过试验证明,当喷吹压力为0.2MPa,滤袋长度为0.6m时,袋底压力峰值为1995Pa~2123Pa,此时清灰效果较好。当喷吹压力为0.6MPa,滤袋长度为2m时,袋底压力峰值为1709Pa。所以在保证清灰强度基础上,对清灰脉冲起压进行降低,并不会对清灰效果造成影响。近年来也相继出现了双膜片电压脉冲阀和直通脉冲阀等低阻脉冲阀,内阻降低了很多,使得喷吹压力也有了非常大的降低。为了保证清灰效果,对喷吹压力进一步降低,可以对喷吹管直接和大气包进行提升,使用喷嘴取代喷孔。

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