Hydrodynamic Resistance of a Rotary Dynamic Dust Collector Under Various Operating Conditions

This study investigates the hydrodynamic performance of a rotary dynamic dust collector, specifically evaluating the impact of operational variables on hydraulic resistance. Experimental trials were conducted using a laboratory-scale prototype under both dry and wet regimes. The investigation covered gas velocities from 10 to 20 m/s, rotational speeds between 400 and 600 rpm, and liquid flow rates ranging from 0.075 to 0.175 m³/h. The findings indicate that total pressure drop is significantly intensified by increments in gas velocity, Rotor rotational speed, and irrigation rates. Specifically, under dry conditions, hydraulic resistance escalated from 107 to 487 Pa at 400 rpm, and reached 637 Pa at 600 rpm with peak gas velocity. During wet operation at 600 rpm, a maximum resistance of 1231 Pa was recorded. These phenomena are attributed to enhanced turbulence intensity induced by the rotor and additional drag forces resulting from the atomization of the liquid phase. The paper provides an in-depth engineering analysis of the governing hydrodynamic mechanisms and proposes a generalized empirical correlation for pressure drop estimation. These results offer critical insights for optimizing the structural parameters and energy efficiency of industrial rotary gas-cleaning systems.

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