垃圾焚烧飞灰熔融过程中氯元素行为研究  

Study on Chlorine Behavior in the Melting Process of MSWI Fly Ash

作　　者：栗博 刘玉坤 熊新宇 张淼 段盼巧 LI Bo;LIU Yukun;XIONG Xinyu;ZHANG Miao;DUAN Panqiao(Beijing China Sciences Runyu Environmental Protection Technology Co.Ltd.,Beijing 100006;Cixi Zhongke Zhongmao Environmental Protection Thermal Power Co.Ltd.,Ningbo Zhejiang 315311;China Association of Urban Environmental Sanitation,Beijing 100044)

机构地区：[1]北京中科润宇环保科技股份有限公司,北京100006 [2]慈溪中科众茂环保热电有限公司,浙江宁波315311 [3]中国城市环境卫生协会,北京100044

出　　处：《环境卫生工程》2025年第1期110-115,共6页Environmental Sanitation Engineering

摘　　要：高温熔融是生活垃圾焚烧飞灰减量化、无害化、资源化的有效处理技术之一。为探究高温熔融过程飞灰中氯元素赋存形态,对飞灰成分进行XRF分析,并开展水洗和水洗后煅烧实验,研究了熔渣碱度、熔盐成分、反应温度和反应时间这4个因素对飞灰熔融玻璃渣中氯元素的分配行为。结果表明:CaCl_(2)在熔渣中溶解度较高,低碱度、高温(1450℃)、较短反应时间(1 h)有利于降低玻璃渣中的氯含量、提高其品质。NaCl和KCl在熔渣中的溶解度均低于CaCl_(2),其中KCl在熔渣中的溶解度最低。High temperature melting is one of the effective treatment technologies of fly ash reduction,harmless and resource utilization in domestic waste incineration.In order to investigate the occurrence form of chlorine in fly ash during high temperature melting process,fly ash composition was analyzed by XRF,and experiments of washing and calcination after washing were carried out.The distributive behavior of chlorine element in fly-ash fused slag was studied from four aspects of slag alkalinity,molten salt composition,reaction temperature and reaction time.Result showed that calcium chloride has a high solubility in slag,and low alkalinity,high temperature(1450℃),as well as short reaction time(1 hour)were beneficial to reduce the chlorine content in slag and could improve the quality.Both sodium chloride and potassium chloride had lower solubility in slag than calcium chloride,and potassium chloride had the lowest solubility in slag.

关 键 词：垃圾焚烧飞灰 熔融 熔渣 氯元素 碱度 

分 类 号：X705[环境科学与工程—环境工程]