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袋式除尘器脉冲喷吹清灰过程的数值模拟

DOI: 10.13334/j.0258-8013.pcsee.2014.23.018, PP. 3970-3976

Keywords: 袋式除尘器,脉冲喷吹清灰,数值模拟,峰值压力,最大反向加速度

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Abstract:

采用计算流体动力学和计算结构动力学的方法,对袋式除尘器脉冲清灰过程进行数值模拟,得到了不同工况下的滤袋壁面峰值压力和最大反向加速度曲线。通过与实验结果的对比,验证了数值模拟结果的可靠性。分析了同喷吹压力、喷嘴直径、滤袋长度和喷吹距离对滤袋清灰效果的影响,并根据数值计算结果拟合出袋壁峰值压力曲线的经验公式。计算结果表明,提高喷吹压力和增大喷嘴直径有助于改善滤袋的清灰效果;滤袋过长会导致滤袋中下部分清灰不力;喷吹距离过大或者过小都可能导致滤袋袋口部分出现破损。

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