Analysis on factors affecting the promotion pressure head of MB fan mill

LIU Jiali; YANG Zhongcan; JIA Xiaoyan; HE Yangpeng; WANG Guifang; WANG Zhichao

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Analysis on factors affecting the promotion pressure head of MB fan mill

Thermal Power Generation Vol. 46, Issue 10, Pages: 111-118(2017)

更新时间：2025-09-28

- Analysis on factors affecting the promotion pressure head of MB fan mill
- 作者机构：
  
  1. 西安热工研究院有限公司
  2. 西安益通热工技术服务有限责任公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621.2
- Published：2017
- 稿件说明：
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LIU Jiali, YANG Zhongcan, JIA Xiaoyan, et al. Analysis on factors affecting the promotion pressure head of MB fan mill[J]. Thermal Power Generation, 2017, 46(10): 111-118.
DOI：

LIU Jiali, YANG Zhongcan, JIA Xiaoyan, et al. Analysis on factors affecting the promotion pressure head of MB fan mill[J]. Thermal Power Generation, 2017, 46(10): 111-118. DOI：

摘要

本文通过在MB型风扇磨煤机上的冷态和热态测试

得到了在纯空气和带粉状态下磨煤机的通风量、出力、入口负压、出口压力及提升压头之间的相关性

分析了MB型风扇磨煤机提升压头的各种影响因素

得到磨煤机的出力、通风量以及煤的可磨性指数等关键指标对MB型风扇磨煤机提升压头的影响规律。结果表明:冷态试验时随着磨煤机出口通风量的升高

磨煤机入口阻力降低、出口阻力升高

且磨煤机出口阻力升高幅度大于入口阻力降低幅度

因此磨煤机提升压头下降;热态试验时磨煤机提升压头随着磨煤机出口通风量的增加而升高

且磨煤机出力增加对提升压头的负向作用大于目前的计算方法;MB型风扇磨煤机通风特性和研磨特性与现有的S型风扇磨煤机有较大不同但又具有一定相似性。该结论可为MB型风扇磨煤机设计和运行提供参考。

Abstract

Through the cold and hot state tests on the MB type fan mill

the correlation among ventilation volume

mill output

negative pressure of the entrance

pressure of the mill outlet and the promotion pressure head in pure air and air with coal powder states was obtained

and the factors affecting the promotion pressure head of the MB type fan mill were investigated

thus the effects of key indexes such as mill output

ventilation volume and HGI index of the coal on the MB type fan mill's promotion pressure head were obtained. The cold test results show that

with the increase of mill outlet ventilation

the mill entrance resistance decreased

the outlet resistance increased

and the increase of the mill outlet resistance was larger than the decrease of the entrance resistance

so the promotion pressure head of the mill declined. The hot test results show that

the promotion pressure head of the mill increased with the mill outlet ventilation

and the negative effect of the mill output on the promotion pressure head was greater than the results calculated by current calculation method. The ventilation and grinding characteristics of the MB type fan mill has great difference but with a certain similarity with that of the S type fan mill. The conclusion can provide technical reference for design and operation of the MB type mill.

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