流化扩大新型产生的密度介质和流量模式的过渡在气体-固体分离流化床
Chenyang Zhou1,2,3, Yuemin Zhao1,2, Chengguo Liu1,2
1Key Laboratory of Coal Processing and Efficient Utilization (China University of Mining &Technology), Ministry of Education, Xuzhou 221116, China.
Fundamental research
|April 17, 2025
概括
这项研究引入了一种新的密度介质,用于气体固体分离流体化床,将磁石和细煤颗粒结合起来,以改善煤炭清洁. 新方法提高了流化稳定性,并为流量模式转换提供了可靠的标准.
科学领域:
- 化学工程是化学工程的重要组成部分.
- 颗粒技术 颗粒技术
- 分离过程 分离过程.
背景情况:
- 气体固体分离流体化床对于通过去除杂质来清理煤炭至关重要.
- 同质流体化是理想的,最大限度地减少压力波动和泡形成.
- 格尔达特C粉末可以提高格尔达特A颗粒的流化稳定性.
研究的目的:
- 开发一种新的密度介质,通过结合Geldart A磁铁和Geldart C细煤颗粒来进行气体固体分离.
- 研究这种新密度介质对流化稳定性和密度相扩张的影响.
- 建立一个定量标准,用于识别流体化床的流动状态过渡点.
主要方法:
- 将Geldart A磁铁颗粒与Geldart C细煤颗粒相结合,创建了一个新的密度介质.
- 分析使用各种密度介质的密度相扩张比率,包括新的组合.
- 使用波传播分析 (冲击波和连续波) 调查流动模式和过渡点.
主要成果:
- 这种新型的密度介质,具有附着在磁铁颗粒上的超细煤,显著增加了密度相扩张.
- 开发了一种定量标准,以准确确定同质扩张的过渡点.
- 与预测数据相比,实验数据和文献值显示出较低的误差范围 (5 × 10−5).
结论:
- 这种新型密度介质有效地提高了气体固体分离中的流化稳定性和密度相扩张.
- 拟议的定量标准可靠地预测不同类型的粒子 (Geldart A,B/D) 的流量状态转换.
- 这项研究为气体固体分离流体床的密度调整方法提供了显著的进步.
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