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Multi-cyclones separator, which consists of many miniature cyclones, works in the same principle as single cyclone in separation of particulate matter from flue gas. However, multi-cyclone is able to attain higher collection efficiency and concurrently avoid rapid increasing of pressure drop due to the usage of small diameter cyclone. The studies on multi-cyclones are very limited and lacking especially on its design configurations due to its confidentiality and commercial reason. Thus, a configuration of a newly optimized multi-cyclone unit named as MR-deDuster is discussed and assessed in this study. Six dimensions considered in the study include diameter of cyclone ( D ), diameter of vortex finder ( D e  ), length of cyclone body ( L b  ), length of cyclone cone ( L c  ), length of vortex finder ( S ), and diameter of dust outlet ( D d  ). The theoretical background of the unit was developed based on the modifications of established design equations available in literatures. The selection of the new dimension and the actual size of the unit were based on two main criteria (the performance of the unit based on its cut-diameter and the ratio of axial dimensions). The predicted cut-diameter and pressure drop of the selected dimension was 1.7 µm and 86 mm of water, respectively. Meanwhile, the optimum axial ratios of the final design were  L b /D  = 1.6,  S/D  = 1, and  L b -S/D  = 0.7, with respect to the diameter of the cyclone.

Configuration of a newly optimized multi-cyclones unit as a fine particulate emission separator in air pollution control