A turbulent bed contactor: energetic efficiency for particle collection

Abstract

-Particle collection experiments were conducted in a fluidizing irrigated bed to evaluate the performance of mobile packings: 38 × 50 mm plain oblate spheroids 38 mm ID plain spheres and alternative perforated spheres with a 38 mm ID and 10% and 25% free areas were used as fluidizing media in a 0.264 m diameter and 1.20 m high turbulent bed contactor (TBC). Particle collection experiments were carried out above the minimum fluidization velocity, using as particulate test powder polysized alumina (size 1.5 to 5.5 µm). Experimental results demonstrated that the perforated spheres performed better in collecting particles than the other packings tested. The efficiency of particle collection was analysed based on energy consumption in the TBC, using the energetic efficiency concept. It was verified that not much more energy was consumed per unit of gas flow in fluidized beds of perforated packings than in those of conventional plain sphere packings, since the perforated spheres were more energetically efficient for particle collection than plain spheres and oblate spheroid packings.

Liquid Holdup in a Pilot‐Scale Turbulent Contact Absorber – An Experimental and Comparative Study

“…Spherically shaped packing is mostly used in TCA. However, irregular packing and packing with perforations have also been studied in terms of hydrodynamics, mass transfer and particulate collection [1][2][3]. Vigorous motion of packing in the bed causes turbulence and hence results in very high mass transfer coefficients as compared to conventional packed beds.…”