Comparison of the Performance of MR-deDuster with Other Conventional Cyclones

Multi-cyclone is widely used in industries as air pollution control device due to several advantages over other available separation units such as its low capital, operating, and maintenance cost and as well as its usability under a wide range of operational conditions. However, it is merely a pre-cleaner as it is inefficient in collecting fine particulate especially, particulate matter with size less than 10 µm (PM10) and below. Hence a simple, cost-effective retrofit on a Conventional Multi-cyclone (CMC) with the motivation of increasing its overall performance on fine particulate emission control was carried out. The retrofit was performed by creating higher negative pressure inside the dust hopper of the CMC by extracting 10% and 24% from the total volumetric airflow rate of the unit with the means of an external Induced Draft Fan. The Computational Fluid Dynamics (CFD) with Reynold Stress Model (RSM) turbulence model was performed and validated using experimental data to gain a better understanding in pressure distribution, velocity profile and particulate movement between the CMC and the Retrofitted Multi-cyclone (RMC). The CFD results show deviation between 0% to 8% for pressure at inlet and outlet of cyclone compared to the experimental results. In addition, CFD results depict that the RMC has higher pressure at the inlet and lower pressure inside dust hopper of CMC, which cause the finer particle to be pulled in through suction outlet. Also, the emission of fine particulate is reduced in RMC by 9% to 16%. compared to the CMC. Moreover, the phenomena at the suction duct can be clearly explained with the usage of CFD. The finding suggests that a simple, cost-effective retrofit at the multi-cyclone has increased the overall performance in the fine particulate collection, and the understanding of the phenomena could be enhanced by the CFD.

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Theoretical Performance of a Multi-Cyclone Fine Particulate Emission Control System

Hussein

Rashid²,

Hashim³

et al. 2019

IOP Conf. Ser.: Mater. Sci. Eng.

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The study involves the development of theoretical performance background of a newly developed multi-cyclones fine particulate emission control system named as MR-deDuster. The theoretical background of the unit was developed based on the modifications of established design equations available in literatures. The Leith & Licht model and modified Lapple model with different definitions of maximum radial distance travelled by a particulate (W) were used to predict the performance of the unit under various volumetric gas flow rate ranging from 0.13 to 0.21 m3/s. The result reveals significant differences among predictions, but yet all the predictions approve the capability of the unit to capture the particulate matter, especially the fine size fraction.

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Comparison of the Performance of MR-deDuster with Other Conventional Cyclones

Abstract: A new type of cyclone design configuration called MR-deDuster,

Cited by 3 publications

References 15 publications

A new cyclone design with adjustable inlet angle and external geometry for optimal PM10 removal

A new cyclone design with adjustable inlet angle and external geometry for optimal PM10 removal

Performance evaluation of a retrofitted multi-cyclone using computational fluid dynamic

Theoretical Performance of a Multi-Cyclone Fine Particulate Emission Control System

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