带有环流预汽提的旋流快分系统动态压力的小波分析

发布时间：2018-06-12 19:59

本文选题：提升管出口旋流快分 + 气固分离　；参考：《过程工程学报》2017年01期

【摘要】：测量了环流预汽提与带隔流筒的旋流快分系统(SVQS)相耦合的大型冷模实验装置的动态压力特性.结果表明,旋流快分系统轴向压力脉动曲线具有很强的相似性,脉动强度随旋流头喷出口气速、颗粒质量流率增大而增大,压力脉动标准偏差与喷出气速、颗粒质量流率存在对应关系.由实验结果关联获得的脉动标准偏差与喷出气速、颗粒质量流率经验公式,可用于预测特定工况下工业装置的颗粒质量流率.通过小波分析,装置主频范围为1.5~12.5 Hz,周期约为7~10 s,旋流快分头上部空间的压力脉动较大,存在不稳定的漩涡区,发现周向脉动基本一致,径向在r/R=0.4~0.7时漩涡区的压力脉动强度较低.为了使装置能稳定运行,建议快分头的喷出气速为18~24 m/s,颗粒质量流率在超过90 kg/(m2?s)范围内.
[Abstract]:The dynamic pressure characteristics of a large scale cold model experimental device coupled with circulating pre-stripping and a fast separation system (SVQS) with a baffle tube are measured. The results show that the axial pressure pulsation curves of the swirl fast dividing system are very similar. The pulsation intensity increases with the velocity of the nozzle and the particle mass flow rate, the standard deviation of the pressure fluctuation and the velocity of the jet exit. There is a corresponding relationship between particle mass flow rate and particle mass flow rate. The empirical formulas of pulsating standard deviation, jet velocity and particle mass flow rate obtained by correlating the experimental results can be used to predict the particle mass flow rate of industrial plants under specific working conditions. By wavelet analysis, the main frequency range of the device is 1.5 ~ 12.5 Hz, and the period is about 7 ~ 10 s. The pressure pulsation in the upper space of the fast split head of the swirl is larger, and there is an unstable swirl region. It is found that the circumferential fluctuation is basically the same. The pressure pulsation intensity in the vortex region is lower at r / R _ (0.4) O _ (0.7) in radial direction. In order to make the device run stably, it is suggested that the jet velocity at the fast end should be 1824 m / s, and the particle mass flow rate should be in the range of more than 90 kg / m ~ 2 路s ~ (-2) 路s ~ (-1).
【作者单位】：中国石油大学(北京)重质油国家重点实验室;
【基金】：国家重点基础研究发展规划(973)基金资助项目(编号:2012CB215004)
【分类号】：TE96;TQ021.1

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