煤化工杂盐脱除有机物回收无机盐的实验研究
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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.
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.
引文
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[13]刘庆生,常晴,李江霖.掺杂对La Cr O3的结构及中红外辐射性能的影响[J].化工进展,2017,36(7):2547-2553.
[2]吴正雷,袁文兵,杜青青.零排放技术在高盐有机废水处理中的应用与展望[J].水处理技术,2016,42(8):1-8.
[3]SENGODAGOUNDER Rajamani.Novel industrial wastewater treatment integrated with recovery of water and salt under a zero liquid discharge concept[J].Reviews on Environmental Health,2016,31(1):63-66.
[4]韩忠明,潘勇延.煤化工企业高盐废水的“零排放”技术[J].化工环保,2016,36(2):193-196.
[5]金可勇,胡鉴耿,金水玉.中水回用RO浓水的零排放工艺比较及优化研究[J].水处理技术,2015,41(1):103-106.
[6]李若征,樊兆世,滕济林,等.煤化工废水制取结晶盐标准探析[J].环境影响评价,2017,39(2):14-17.
[7]王强,步学朋,王明华.现代煤化工产业环保问题分析[J].神华科技,2016,14(5):91-94.
[8]崔粲粲,粱睿,罗霂.现代煤化工含盐废水处理技术进展及对策建议[J].洁净煤技术,2016,22(6):95-100.
[9]尹艳山,王泽忠,田红,等.热解温度对无烟煤焦微观结构和脱销特性的影响[J].化工进展,2015,34(6):1636-1640.
[10]陈磊,张永发,刘俊,等.低阶煤低温干馏高效采油技术研究进展[J].化工进展,2013,32(10):2343-2351.
[11]李春雨,蒋旭光,安春国.农药生产废渣燃烧/热解特性研究[J].中国电机工程学报,2009,29(23):45-49.
[12]钱原吉,吴占松.油漆废渣的热解特性与热解工艺[J].清华大学学报,2008,48(2):237-239.
[13]刘庆生,常晴,李江霖.掺杂对La Cr O3的结构及中红外辐射性能的影响[J].化工进展,2017,36(7):2547-2553.
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