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生物质炭再燃脱汞技术的试验研究

DOI: 10.13334/j.0258-8013.pcsee.2014.S.020, PP. 142-146

Keywords: 生物质炭,再燃,脱汞,煤燃烧,锅炉

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Abstract:

燃煤的汞排放控制技术是个十分重要的环保课题。采用生物质炭作为再燃燃料,并掺混一定比例的尿素或者消石灰,在某锅炉主燃烧器上方喷入炉膛,研究生物质炭再燃技术对燃煤脱汞的影响。试验结果表明:掺混不同物料的生物质炭进行再燃时,能够抑制煤燃烧时汞向烟气中的迁徙能力,促使烟气中的元素态汞(Hg0)向氧化态汞(Hg2+)或颗粒态汞(HgP)转化,有效降低了尾部烟气中总汞含量,提高了除尘器内飞灰和炉渣中的汞含量;试验还发现掺混消石灰的生物质炭对元素态汞的氧化促进作用更强,降低烟气总汞含量的作用更明显。

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