文献类型：期刊文献

英文题名：Sludge low-temperature drying with mainly non-phase change in mere seconds based on particle high-speed self-rotation in cyclone

作者：Li, Qiqi[1];Cheng, Tingting[1];Lu, Yufei[2];Zhang, Bin[2];Huang, Yuan[3];Yang, Yuan[2];Li, Chunjiang[2];Li, Jianping[1];Wang, Hualin[1];Fu, Pengbo[1]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Ind Wastewater Detoxicat & Resou, Shanghai 200237, Peoples R China;[2]Shanghai Ceo Environm Protect Technol Co Ltd, Shanghai 200438, Peoples R China;[3]Shanghai Univ, Inst Environm Pollut & Hlth, Shanghai 200444, Peoples R China

年份：2022

卷号：224

外文期刊名：WATER RESEARCH

收录：;EI(收录号：20223812761621);WOS:【SCI-EXPANDED(收录号:WOS:000858489400006)】；

基金：This work was supported by the sponsorship of the National Key Research and Development Program of China (2019YFA0705800) and the National Natural Science Foundation of China (52000073 and 52030001) .

语种：英文

外文关键词：Sludge drying; Cyclone; Particle self-rotation; Non-phase change; Cyclone crushing; Energy saving and consumption reduction

摘要：Improper sludge treatment will cause serious environmental problems, and sludge drying is the key to effective treatment. Almost all the existing sludge drying technologies use heating to overcome the great latent heat of moisture vaporization, which leads to high drying energy consumption. In this study, based on the particle high-speed self-rotation in the cyclone and micro-interface oscillations, the cyclone self-rotation drying (CSRD) technology was developed. It can realize drying of the dewatered landfill sludge (DLS) and the urban sewage dewatered sludge (UDSS) with mainly non-phase change. The obtained results reveal that at low carrier gas temperatures (< 100 ?) and very short residence time (< 15 s), the moisture content of the DLS decreased from 53% to 6.85%, and that of the UDSS decreased from 67% to 18.92%. Through calculation, the proportions of moisture non-phase change removal during the CSRD process touched 68.94% and 63.39%, respectively. Based on the experimental studies, we proposed an enlarged industrial application program (50 t/d) for the UDSS drying by employing the CSRD technology. The operating cost was 159.69 CNY/t H2O, showing prominent advantages. This study can provide guidelines for the practical application of CSRD technology and fill the scientific gap in the field of moisture non-phase change separation for sludge drying.