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Article – Journal of Advanced Chemical Sciences

Journal of Advanced Chemical Sciences, Volume 2,Issue 2,2016 Pages 219-222

Improvement in Stage Efficiency and Reduction in Energy Consumption of Distillation Through Artificial Irrigation
S.L. Bhole, N.P. Patil*, V.S. Patil, M.G. Gharpure

In past few years, distillation remains the widely used separation technique in chemical industries. Requirement of heat energy in terms of steam consumption is the key requirement in distillation. Distillation is perhaps the most energy consuming operation in all the separation processes. The paper in detail focuses on the reduction in energy consumption in distillation through the application of novel technology. The proposed technology offers various advantages over conventional distillation operation including increased stage efficiency, reduced space and height requirement. Additionally this technology brings the considerable reduction in fixed cost in terms of capital cost. The technology offers these advantages at the slightly increased operating cost in terms of artificial irrigation. An attempt is made to improve the stage efficiency, by using an external re-circulating pump. In a reported work, distillation of Methanol-Water binary system is studied. The liquid mixture on the stage is re-circulated back at same stage, by using an external pump. The stage efficiency was estimated by analyzing the liquid on the stage with and without pump and for different reflux ratios. The obtained results are satisfactory and show considerable improvement in stage efficiency.

Keywords: Artificial Irrigation; Reflux Ratio; External Recirculation; Murphree Efficiency; Energy Optimization;