• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Separation and Purification Technology >Experimental study on liquid flow fields in de-foulant hydrocyclones with reflux ejector using particle image velocimetry
【24h】

Experimental study on liquid flow fields in de-foulant hydrocyclones with reflux ejector using particle image velocimetry

机译：使用粒子图像速度测速器回流喷流液流域液体流场的实验研究

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

Hydrocyclone has been extensively used in various separation processes. For example, in the sewage source heat pump system, a De-Foulant Hydrocyclone with Reflux Ejector (DFHRE) can fully use the kinetic energy of its overflow to suck its underflow and flush away the foulants flowing out with the underflow. Our previous experiments in 2018 showed that the reflux ejector could prevent the underflow orifice from blocking, and reducing the suction angle could increase the separation efficiency by approximately 10% whereas decreasing its energy consumption markedly. To date, however, its mechanism is still unclear. Therefore, in this study, we used the Particle Image Velocimetry (PIV) method to study the flow field in DFHREs with different suction angles and compared it with that in the traditional hydrocyclone without reflux ejector. Results indicated that, in all the tested DFHREs, there was a negative-axial-velocity area in the center of hydrocyclones, which was not found in the center of the tested traditional hydrocyclone. The negative axial velocity produced by the overflow-suck-underflow decreased with increasing suction angle whereas increased with increasing inlet velocity. The split ratio and total pressure drop of the DFHRE are respectively and approximately 18.5% and 28.3kPa greater than those of the traditional hydrocyclones at the suction angle of 30 degrees. This proved that the experimental performance of the sewage suction ejector used in hydrocyclone, that is, the suction effect of the reflux ejector and the separation efficiency of DFHRE were the best at the suction angle of 30 degrees. Besides, the obtained change of flow field caused by the reflux ejector provided a new idea for enhancing hydrocyclone separation.
机译：水力旋流器已被广泛用于各种分离过程。例如，在污水源热泵系统中，具有回流喷射器（DFHRE）的脱污染的水力旋流器可以充分利用其溢流的动能，以吸取其底部流，并刷新与下溢中流出的污垢。我们之前的2018年的实验表明，回流喷射器可以防止下流孔阻断，减小吸力角可以将分离效率提高约10％，而显着降低其能量消耗。然而，迄今为止，其机制尚不清楚。因此，在本研究中，我们使用粒子图像速度（PIV）方法在具有不同抽吸角度的DFHRE中的流场研究，并将其与传统水力旋流器的无反流喷射器进行比较。结果表明，在所有测试的DFHRE中，氢旋流器中心存在负轴向 - 速度区域，其在测试的传统水力旋流器中心未发现。通过增加吸力角度的溢流缓冲溢出产生的负轴向速度随着抽吸角的增加而降低而随着入口速度的增加而增加。 DFHRE的分裂率和总压降分别大约18.5％和28.3kPa，其在30度的吸入角下的传统氢旋流酮的5％。这证明了水力旋风中使用的污水吸入喷射器的实验性能，即回流喷射器的抽吸效果和DFHRE的分离效率在30度的吸入角中最好。此外，由回流喷射器引起的流场的获得变化为增强水力旋流分离提供了新的思路。

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