化工学报2019，Vol.70Issue(8)：3132-3141,10.DOI:10.11949/0438-1157.20190072
污泥与褐煤共水热碳化的协同特性研究
Investigation on synergistic characteristics of sludge and lignite during co-hydrothermal carbonization
摘要
Abstract
The resource utilization of sludge has always been the focus of research by scholars. And their conversion into high quality solid fuels (hydrochars) via hydrothermal carbonization (HTC) is proved to be a promising potential technology. In this work, Co-HTC of sludge (sewage sludge, SS; deinking sludge, DS) and lignite (LC) was investigated to obtain a better preparation technology of sludge-derived hydrochars. The synergetic effect of mixing ratio (3∶7, 5∶5, 7∶3) on the HTC upgrading of sludge/LC mixtures was explored. And the combustion performance of hydrochars was also analyzed. The results have demonstrated that sludge/LC mixtures at a mixing ratio of 5∶5 have exhibited an optimal performance of hydrochar products. Specifically, the hydrochar yields can reach up to 81.08% and 86.00% for LC/SS and LC/DS, respectively. And high synergistic coefficients are observed in hydrochar yield (LC/SS-1.69%, LC/DS-0.18%), organics retention (LC/SS-11.90%, LC/DS-2.64%) and carbon retention (LC/SS-4.08%, LC/DS-0.77%), indicating a more remarkable synergetic effect of LC/SS than LC/DS. Besides, the higher heating value (HHV) and coalification degree of hydrochars can be enhanced by the increasing proportion of LC, which not only improves the fuel characteristics of hydrochars, but also makes it more stable and sufficient in the combustion process. These findings indicate that higher quality fuels can be obtained by Co-HTC pretreatment, thereby realizing the effective utilization of sludge/lignite.关键词
污泥/褐煤/共水热碳化/协同作用/燃料特性Key words
sludge/ lignite/ co-hydrothermal carbonization/ synergistic effects/ products characterization分类
能源科技引用本文复制引用
宋艳培,庄修政,詹昊,王南涛,阴秀丽,吴创之..污泥与褐煤共水热碳化的协同特性研究[J].化工学报,2019,70(8):3132-3141,10.基金项目
国家重点研发项目(2016YFE0203300) （2016YFE0203300）
广东省自然科学基金项目(2017B030308002) （2017B030308002）
广州市科技计划项目(201803030006) （201803030006）
