摘要
随着城市化的不断发展,生活垃圾焚烧飞灰和污水厂脱水污泥的产量显著上升。真空碳热还原法作为一种新兴的再处理技术,对生活垃圾焚烧飞灰和污泥的再处理显示出卓越的效果。本研究选取了生活垃圾焚烧飞灰与污泥作为原料,采用真空碳热还原法对其中的重金属和钾盐进行脱除和回收处理。研究了烧结温度、污泥掺加量、烧结时间和系统压力对重金属及钾去除率的影响。结果表明,在系统压力为200 Pa、烧结温度为900℃、污泥掺加量的质量分数为35%、烧结时间为60 min的条件下,铅、锌、铜、铁和钾的去除率分别达到93.96%、92.48%、64.02%、23.34%和76.56%。
With the continuous development of urbanization,municipal solid waste incineration fly ash and dehydrated sludge from sewage treatment plant has significantly increased.Vacuum carbon thermal reduction,as an emerging reprocessing technology,demonstrates outstanding efficacy in the re-treatment of fly ash and sludge from municipal solid waste.This study selected municipal solid waste incineration fly ash and sewage treatment plant dehydrated sludge as raw materials,utilized the vacuum carbon thermal reduction method for the removal and recovery of heavy metals and potassium salts.Impacts of sintering temperature,sludge blending ratio,sintering time,and system pressure on the removal efficiency of heavy metals and potassium were investigated.Pb(93.96%),Zn(92.48%),Cu(64.02%),Fe(23.34%)and K(76.56%)were removed with 35%sludge doping dosage at 900℃under 200 Pa for 60 min.
作者
谭雨姣
张晓文
张月华
罗明亮
宋志军
彭莹
TAN Yujiao;ZHANG Xiaowen;ZHANG Yuehua;LUO Mingliang;SONG Zhijun;PENG Ying(School of Resources Environment and Safety Engineering,University of south China,Hengyang,Hunan 421001,China;Hunan Qinglian Environmental Protection Technology Co.,Ltd.,Hengyang,Hunan 421009,China)
出处
《南华大学学报(自然科学版)》
2024年第5期17-24,共8页
Journal of University of South China:Science and Technology
基金
湖南省自然科学基金项目(2021JJ50094)
衡阳市科技创新平台计划项目(202150083887)。
关键词
生活垃圾焚烧飞灰
脱水污泥
真空碳热还原
重金属
钾盐
回收利用
municipal solid waste incineration fly ash
dehydrated sludge
vacuum carbothermal reduction
heavy metals
potassium salts
recycling
作者简介
谭雨姣(1999-),女,硕士研究生,主要从事固体废物资源化方面的研究。E-mail:1928567889@qq.com;通信作者:张晓文(1967-),男,教授,博士,主要从事固体废物资源化方面的研究。E-mail:shawn_zhang@sina.com。
