Strong and flexible thermal and environmental pairing between pulp drying and sugar process

Abstract

A new combination of two technologies, i.e.: low temperature belt drier and indirect triple-pass turbo-drier is introduced for drying of beet pulp, to reduce energy consumption thereby increasing pellet quality, lowering environmental impacts and meeting more stringent regulations. A coupling with the beet sugar factory is studied in order to minimize fossil fuel consumption using a low temperature belt drier. Calculated results for a 10,000 t/d beet sugar factory are given. In case of installations independent from a beet sugar plant, fuel consumption is reduced by 50% or more based on Lower Heating Value basis (LHV) ) to evaporate the desired water quantities without any coupling. In case of integration into a beet sugar factory fuel consumption for pulp drying can be reduced by 70% to 90% (LHV basis) to evaporate the desired water quantities with simple coupling.