摘要
针对煤化工杂盐处理的难题,提出一种从煤化工杂盐中回收无机盐的方法。在杂盐组分分析的基础上,将干馏技术应用于杂盐脱除有机物中,通过干馏技术及结晶技术相结合从杂盐中制备符合国家工业级标准的氯化钠产品。考察了干馏温度与时间对有机物脱除率及对干馏后固体中TOC残留值的影响,并对干馏过程的气体及固体产物进行了分析,实验结果表明:煤化工杂盐中有机物含量高、种类复杂,在干馏温度450—650℃、干馏时间30—120min范围内,有机物脱除率可达99%以上,干馏后固体中TOC残留值在50 mg/kg以下;通过结晶与资源化实验回收无机盐,制得的无机盐产品达到工业盐标准,可作为产品出售。
To solve the problem of mixed salts in coal-chemical industry,a method of recycling salts from mixed salts was proposed. Based on the composition analysis of mixed salt,the destructive distillation technology was applied to remove the organics from the mixed salts. Combining destructive distillation with crystallization technology,the sodium chloride met national industrial standard was made. The effects of temperature and time were investigated according to the organic removal rate and TOC residue after destructive distillation. Moreover,gassy and solid product was analyzed during the destructive distillation. The result shows that organics is high and complicate in coalchemical industrial mixed salt. At the temperature range of 450-650 ℃ and distillated for 30-120 min,organic removal rate could reach 99% or even higher and TOC residue of solid product is lower than 50 mg/kg. The inorganic salts were recycled by crystallization and resource utilization technology. The obtained inorganic salt products qualify the standard of GB/T5462—2015 and can be sold as products.
作者
田颖
滕济林
李若征
张旭辉
赵崇
刘晓宇
张璐超
TIAN Ying;TENG Ji-lin;LI Ruo-zheng;ZHANG Xu-hui;ZHAO Chong;LIU Xiao-yu;ZHANG Lu-chao(Nari Group Corporation/State Grid Electric Power Research Institute,Nanjing 210000,Jiangsu Province,China;Beijing Guodian Futong Science and Technology Development Co.,Ltd.,Beijing 100070,China;College of Science,China University of Petroleum,Beijing 102249,China)
出处
《化学工程》
CAS
CSCD
北大核心
2018年第6期68-72,共5页
Chemical Engineering(China)
关键词
煤化工
杂盐
有机物
干馏
结晶
资源化
coal chemical industry
mixed salt
organic compounds
destructive distillation
crystallization
resource utilization
