A numerical analysis of two-phase flow inside drum type sewage sludge dryer

Abstract

Sewage sludge is being reduced in volume and solidified for utilizing fuel. Higher drying efficiency is required to save the energy. In the drum sewage sludge dryer, the stirrability of the sludge affects the drying time. A numerical analysis model is constructed to predict the flow of sludge and verified the validity of the model by element tests. In addition, we investigated some factors to improve stirrability by numerical analysis of actual machine.