...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Powder Technology: An International Journal on the Science and Technology of Wet and Dry Particulate Systems >Design of pulse-jet systems for milk powder baghouses
【24h】

Design of pulse-jet systems for milk powder baghouses

机译：奶粉袋式除尘器的脉冲喷射系统设计

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A pilot scale pulse-jet baghouse was used to investigate the influence of several key pulse-jet design parameters on the overall effectiveness of the pulse. Firstly, the effect of pulse nozzle position on the acceleration of the filter fabric was measured using a lightweight accelerometer attached to the bag surface. Secondly, skim milk powder (SMP) was filtered in the baghouse, and the influence of pulse air supply pressure, nozzle position, and pulse duration on the cleaning effectiveness was determined by measuring the baghouse pressure drop before and after pulse cleaning. Results were compared to previous studies from other industries to provide guidelines for optimising baghouses for milk powder collection. Increasing the pulse air supply pressure was the most effective way to improve the pulse cleaning performance. Increasing the distance between the pulse nozzle and the bag opening was found to have no effect on the pressure drop after the pulse, despite previous studies with larger baghouses showing that a greater nozzle distance increases the entrainment of secondary air into the pulse. This difference was determined to be due to the small size of the clean air plenum in the baghouse used here, which restricted the entrainment of secondary air. Fabric deceleration was found to be a poor measure of pulse cleaning performance. Changes in the measured fabric acceleration did not correspond to changes in the pressure drop following the pulse. In addition, the tensile stresses on the cake caused by the acceleration were found to be insufficient to cause cake removal. While direct measurements of the bond strength between milk powder filter cakes and polyester filter fabrics are not available, estimates can be obtained from studies on similar systems. Effective pulse cleaning was achieved even when the tensile stress on the filter cake produced by the fabric deceleration was much lower than estimates of the bond strength, indicating that other mechanisms must be important to the cleaning process. Increasing the pulse duration from 0.1 s to 035 s had no effect on the baghouse pressure drop. This indicated that the cleaning effect of the pulse occurred during the initial expansion of the filter bag, while continued reverse airflow during the remaining duration did not contribute to the cleaning effect. The pulse duration should therefore be kept short to minimise the compressed air consumption. (C) 2015 Elsevier B.V. All rights reserved.
机译：使用中试规模的脉冲喷射袋式收尘器来研究几个关键脉冲喷射设计参数对脉冲总体有效性的影响。首先，使用安装在袋子表面的轻型加速度计测量脉冲喷嘴位置对滤布加速度的影响。其次，在集尘室中过滤脱脂奶粉（SMP），并通过测量脉冲清洁前后的集尘室压降来确定脉冲供气压力，喷嘴位置和脉冲持续时间对清洁效果的影响。将结果与其他行业的先前研究进行比较，以提供优化袋式除尘器收集奶粉的指南。增加脉冲供气压力是提高脉冲清洁性能的最有效方法。尽管先前对较大的集尘室进行的研究表明，较大的喷嘴距离会增加二次空气进入脉冲中，但发现增加脉冲喷嘴和袋开口之间的距离对脉冲后的压降没有影响。确定该差异是由于此处使用的集尘室中的洁净空气增压室较小，这限制了二次空气的夹带。发现织物减速不能很好地衡量脉冲清洁性能。测得的织物加速度的变化与脉冲后的压降变化不对应。另外，发现由加速度引起的蛋糕上的拉应力不足以引起蛋糕的去除。虽然无法直接测量奶粉滤饼和聚酯滤布之间的粘合强度，但可以从类似系统的研究中获得估计值。即使通过织物减速在滤饼上产生的拉应力远低于粘结强度的估计值，也可以实现有效的脉冲清洁，这表明其他机理对于清洁过程也很重要。将脉冲持续时间从0.1 s增加到035 s对集尘室压降没有影响。这表明脉冲的清洁效果发生在滤袋的初始膨胀期间，而在剩余时间内持续的反向气流对清洁效果没有贡献。因此，脉冲持续时间应保持较短，以最大程度地减少压缩空气消耗。 （C）2015 Elsevier B.V.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号