International Sugar Journal

Understanding the impact of improved wetting rates on the performance of Malalane mill’s first and second effect evaporators [Full subscriber]

Abstract The high V1 demand from the back-end refinery and striving to be more energy-efficient has initiated an investigation into the evaporator performance of the Malalane sugar mill. Numerous factors, such as sufficient steam pressure, evaporator tube cleanliness and heat transfer area, impact an evaporator’s performance. However, with the wetting rates of the first-effect vessels being as low as 20 kg/h/tube, it was obvious that this problem needed to be solved first. Research has shown that an increased wetting rate improves the heat transfer coefficient, the specific evaporation rate and, therefore, the overall performance of the evaporator station. The installed…

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