Thermodynamic Analysis of a Sludge Drying andIncinerating Process System

This paper presents a study on a sludge disposing system using exergy analysis approach and energy utilization diagram methodology. The results showed that, among the main equipment of the system, the furnace has the largest irreversibility (about 49.46% of the total exergy input) and the heat recovery steam generator (or HRSG) has the lowest exergy efficiency (about 23.80%). Suggestions are accordingly provided on heat transfer enhancement and thorough mixing of fuels.