磨煤机前圆形一次风道均流设计和优化

doi:10.6040/j.issn.1672-3961.0.2022.241

摘要/Abstract

摘要： 采用计算流体力学方法,分析磨煤机前冷热一次风道的流动特性,包括风门开度对流场的影响、测量截面的均匀程度、常规均流措施的实际效果。针对冷热风混合后的速度不均问题和常规均流措施所造成的压降过大问题,提出一种对开风门的均流设计。结果表明:常规均流孔板虽然能够提升速度均匀度,但是部分开度时压降普遍超过4 kPa。对开式风门既有导流能力也有整流能力,部分开度时其速度相对标准差普遍小于0.4,压降普遍小于1.5 kPa,较常规均流孔板有明显优势。该结果可为电厂磨煤机前一次风道的均流设计提供参考。

关键词: 磨煤机, 圆形风道, 均流, 对开风门, 优化

中图分类号:

TB126

张斌,李官鹏,程鹏,李元鲁,辛公明,季万祥. 磨煤机前圆形一次风道均流设计和优化[J]. 山东大学学报 (工学版), 2023, 53(5): 142-148.

ZHANG Bin, LI Guanpeng, CHENG Peng, LI Yuanlu, XIN Gongming, JI Wanxiang. Design and optimization of the homogenization flow in the circular primary air duct in front of the coal mill[J]. Journal of Shandong University(Engineering Science), 2023, 53(5): 142-148.

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