Title
A simulation of evaporation dissolution process for a Lyocell solution in a vertical wiped film evaporator (1: Simulation of flow process for solution)
Authors
CHOL-JUN RI, YON-CHOL KIM, SUNG-WON KIM and JONG-HYOK CHOE

Received November 10, 2022
Published Volume 57 Issue 7-8 July-August
Keywords Lyocell solution, vertical wiped film evaporator, evaporation dissolution, simulation, residence time

Abstract
Vertical wiped film evaporators (VWFE) have found wide application in chemical, food and especially, fiber industries. In this paper, a mathematical simulation is represented for the vacuum evaporation dissolution process of Lyocell solution (reed cellulose, N-Methylmorpholine N-oxide (NMMO) solvent, water) in VWFE. The Turbulent Flow model in geometries with rotating parts and the frozen rotor approach in COMSOL Multi-physics 5.4 were used for simulation of the solution flow in VWFE. Comparing the obtained simulation results with experimental details, we show the effect of our simulation method.