L'impact de l'extraction sous vide avec recyclage sur l'application des solutions de produits chimiques aux nappes textiles
This study considers a number of different configurations of typical textile impregnation systems, with and without subsequent vacuum extraction and recycling of the extracted solution to the bath or the solution reservoir. The operation of these systems and the effects of changes in the process variables are examined using the appropriate differential mass balance equations. Initially, it is assumed that the solution of chemical can be absorbed by the fabric, partially vacuum extracted, and then the extract recirculated back to the bath or reservoir, without any change in concentration of the chemical in the solution. Subsequently, a number of perturbations are examined which can result in a change in the concentration of the recycled solution. These include evaporation of the extracted solution under vacuum, preferential absorption of the chemical from the solution by the fibres (affinity), and preferential absorption of the water rather than the chemical (reversed affinity).
- Génie – Mémoires