液态添加剂对CFB锅炉SNCR脱硝的影响
发布时间:2018-03-19 22:31
本文选题:循环流化床(CFB)锅炉 切入点:添加剂 出处:《煤炭学报》2016年10期 论文类型:期刊论文
【摘要】:为提高SNCR脱硝技术在低温下的脱硝效率,选取乙醇、NaCl、Na OH三种液态物质作为添加剂,在小型机理脱硝实验台和中等规模脱硝实验台上开展了研究。研究结果表明,小型实验台上,650℃、添加剂加入比例0~0.6条件下,乙醇可将脱硝效率从5%提升到45%,微量的(20×10-6)NaCl可以提高800℃以上的脱硝效率。在中等规模脱硝实验台上,乙醇因具有最佳的混合条件不同温度下对脱硝的促进作用差异明显,NaCl,NaOH因床料含有Na对脱硝无明显促进作用。添加剂与还原剂混合条件、床料成分等会使添加剂在CFB锅炉实际使用过程中产生与机理实验相差较大的结果。
[Abstract]:In order to improve the denitrification efficiency of SNCR denitrification technology at low temperature, three kinds of liquid substances, NaCl-NaOH, were selected as additives. The denitrification efficiency can be increased from 5% to 455.The denitrification efficiency can be increased by a small amount of 20 脳 10 ~ (-6)% NaCl on a small scale test bench, and the denitrification efficiency can be increased at a medium scale denitrification test table under the conditions of 650 鈩,
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