化学工程2023，Vol.51Issue(12)：6-9,4.DOI:10.3969/j.issn.1005-9954.2023.12.002
市政造粒污泥及返混堆叠低温干燥特性分析
Analysis of low temperature drying characteristics of municipal granulated sludge and re-blending stack
摘要
Abstract
To investigate the key factors affecting the drying effect of sludge pellets,drying experiments were carried out at different temperatures and pelletizing sizes for re-blended and non-re-blended sludge pellets by means of external extrusion pelletizing.The results reveal that the extrusion shape has a minor influence on sludge particle drying,however the pelletizing size and drying temperature have a considerable effect on sludge particle dewatering efficiency,and temperature is the most important component in sludge particle drying.Second,in terms of drying time,drying rate and extrusion energy consumption,rectangular-shaped sludge pellets with the pelletizing size of 6 mm are dried best at 80 ℃ in the non-re-blended sludge pellet drying experiment,while cylindrical sludge pellets with the pelletizing size of 6 mm are dried best at 80 ℃ in the re-blended sludge pellet drying experiment.Finally,in the re-blended sludge pellet stack drying experiment,the drying rate of sludge pellets stacked in three layers is 45.6％and 20％higher than that of single layer and two layers,and the drying rate is increased by 23％ compared with that of non-re-blended single layer sludge.关键词
污泥干化/污泥返混/挤压造粒/低温干燥/堆叠Key words
sludge drying/sludge re-blending/extrusion granulation/low temperature drying/stacking分类
化学化工引用本文复制引用
姜奇伦,吴志根,陈凯盛,张冠华..市政造粒污泥及返混堆叠低温干燥特性分析[J].化学工程,2023,51(12):6-9,4.基金项目
国家自然科学基金资助项目(51976126) （51976126）
上海市自然科学基金资助项目(22ZR1442700) （22ZR1442700）
中央高校基本科研业务费专项资金资助项目(2022-4-YB-06) （2022-4-YB-06）
