Dye Bath Waste Heat Recovery in Dyeing Process

Abstract

Dyeing section consisting of nine dyeing processes is analysed. These dyeing processes are great consumers of heat energy that is used for warming of bath in which textile is dyed. It was found that dye baths from some phases or sub-phases of processes, rejected unused into sewage, carry significant waste heat potential. Also, difficulties in dye bath waste heat reuse are found in significant intermittence of investigated processes where different duration of particular phases or sub-phases and different times of filling fresh water into machines and emptying dye bath from them are encountered. Therefore, generalised model for estimation of dye bath waste heat potential is proposed and is applied to analysed dyeing section. It was found that heat energy saving potential is 27.8 %. The same model is also applied to each process as itself that resulted in possible heat energy saving up to 53.9 %.