Mathematical model of desorption of acetone from spools with freshly spun acetate fibre

Abstract

A computation experiment confirmed the possibility of significantly reducing the time of desorption of acetone from a layer of acetate fibre and pointed to two ways of reducing emission of acetone into the atmosphere: 1) Increasing the temperature by feeding heated air or live steam into the desorption chamber filled to the maximum with trucks with spools after spinning. In desorption of acetone with hot air, the hot air can be directed to a regeneration system; when water vapor is used with subsequent condensation, the recovered product can be separated in a rectification installation. 2) Addition of an adsorbent to the system. The use of materials made of activated carbon fibre (ACF) is the most efficient since it is not difficult to give it the configuration required for encapsulation of each spool or several spools, for example, in a polymer container [4]. In this case, it is possible to combine the operations of desorption of acetone from acetate fibre and stabilization in steam—water medium if moisture-saturated ACF are used. Since it has a higher affinity for carbon adsorbents than water, acetone will displace water from ACF so that the water vapors in the spool with the acetate fibre will create an opposing sorption front.