Efficient crystallization: Paving the way to 100% electrification in crystallization

This paper addresses the urgent need to decarbonize the beet sugar industry, driven by environmental and climate crises. Focusing on the crystallization stage of sugar production, De Smet Engineers & Contractors introduces the CRISTA-TOP® concept as an innovative configuration incorporating a flash/cooling crystallizer and enhancing the batch crystallization by reducing the massecuite level above the calandria while using high DS content standard liquor. Compared to standard crystallization processes, the CRISTA-TOP® design reduces the total evaporation work by 43% and decreases waste heat by 53%. Additionally, the heating steam temperature for the evaporating crystallizers is reduced from 108 °C to 97 °C, further optimizing energy consumption. This concept not only lowers the environmental footprint but also maintains high sugar quality. By electrifying the crystallization stage, CRISTA-TOP® enables the use of renewable electricity, which is particularly beneficial during syrup campaigns. The development is based on a robust conceptual methodology to optimize and electrify a reference beet sugar factory, using advanced simulation models that can define multiple decarbonization pathways. De Smet Engineers & Contractors supports the industry’s energy transition and promotes sustainable practices globally.