Design and hydraulic study of double‐partition dividing‐wall column

Abstract Dividing‐wall column (DWC) provides tremendous advantages in terms of energy savings and capital costs for three‐component and even multi‐component separations. With increasing industrial application of three‐component DWCs, DWCs for separation of four‐component have received considerable research attention. The aim of this work is to investigate the design of the two‐staggered wall region and gas–liquid two‐phase flow behavior on the tray in a double‐partition DWC (DPDWC). The Aspen Plus was applied to simulate the steady state to obtain the gas–liquid‐phase flow rate in each region to serve as the basis for the tray design. In different task regions, the gas‐ and liquid‐phase flow varied in some ways. The drag models have variability for the study of fluid flow, and the Tomiyama model is more appropriate. Moreover, high‐velocity gradients and recirculating phenomenon can be discovered owing to the existence of multiple partitions in DPDWC.