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Pretreatment of recycled paper sludge with a novel high-velocity pilot cyclone: Effect of process parameters on convective drying efficiency

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  • Mäkelä, Mikko
  • Geladi, Paul
  • Larsson, Sylvia H.
  • Finell, Michael

Abstract

To address the growing need for economically viable sludge processing technologies and associated resource recovery, a novel convective high-velocity pilot cyclone was set-up at the Swedish University of Agricultural Sciences in Umeå, Sweden. In essence this process entails feeding (⩽900kgh−1) a material to a heated high-velocity air flow (approx. 13×103m3h−1) allowing moisture removal at low temperatures. This equipment is expected to improve drying of challenging industrial sludge materials when used as a pretreatment method prior to further processing. Modeling results based on an experimental campaign on recycled paper mill sludge indicated that efficient drying with a specific energy consumption of ⩽1–1.2kWhkg−1H2O can be achieved with inlet air temperature levels ⩾40°C coupled with respective feeding capacity of ⩽750kgh−1.

Suggested Citation

  • Mäkelä, Mikko & Geladi, Paul & Larsson, Sylvia H. & Finell, Michael, 2014. "Pretreatment of recycled paper sludge with a novel high-velocity pilot cyclone: Effect of process parameters on convective drying efficiency," Applied Energy, Elsevier, vol. 131(C), pages 490-498.
    • Handle: RePEc:eee:appene:v:131:y:2014:i:c:p:490-498
    DOI: 10.1016/j.apenergy.2014.06.057
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    References listed on IDEAS

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    1. Bennamoun, Lyes & Arlabosse, Patricia & Léonard, Angélique, 2013. "Review on fundamental aspect of application of drying process to wastewater sludge," Renewable and Sustainable Energy Reviews, Elsevier, vol. 28(C), pages 29-43.
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    Cited by:

    1. Liu, Huan & Yi, Linlin & Zhang, Qiang & Hu, Hongyun & Lu, Geng & Li, Aijun & Yao, Hong, 2016. "Co-production of clean syngas and ash adsorbent during sewage sludge gasification: Synergistic effect of Fenton peroxidation and CaO conditioning," Applied Energy, Elsevier, vol. 179(C), pages 1062-1068.
    2. Fu, Pengbo & Yu, Hao & Li, Qiqi & Cheng, Tingting & Zhang, Fangzheng & Yang, Tao & Huang, Yuan & Li, Jianping & Fang, Xiangchen & Xiu, Guangli & Wang, Hualin, 2022. "Cyclone rotational drying of lignite based on particle high-speed self-rotation: Lower carrier gas temperature and shorter residence time," Energy, Elsevier, vol. 244(PB).

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