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Characteristics and model of sludge adhesion during thermal drying
Huan Li1, Shuxin Zou, Yangyang Li
1Graduate School at Shenzhen, Tsinghua University, Shenzhen, China. lihuansz@qq.com
None:
During sludge thermal drying, the sludge adhered on the heated surface of drying equipments may affect drying efficiency. Sludge thermal drying experiments were conducted to investigate the effect of different drying conditions on sludge adhesion. The mass of sludge adhered on the heated surface (dryer wall) reached the maximum when sludge water content was about 60%. A high drying temperature would result in more sludge adhered on the heated surface in the temperature range of 80-160 degrees C. The convection heating and rougher surface would also lead to more sludge adhered on the heated surface. The relation between the maximum mass of adherent sludge and drying temperatures could be described by an exponential equation.
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