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基于褐煤水热废液制备聚羧酸水煤浆分散剂

Coal Science and Technology(2016)

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Abstract
水热处理工艺可显著提高褐煤水煤浆浓度,但副产大量有机废液,直接排放会造成煤中有机组分的流失和环境污染.因此,以乙酸、聚乙二醇、丙烯酸等为原料,分别以去离子水、褐煤水热废液为分散相,合成了作为同系参照组的聚羧酸型水煤浆分散剂(WX)和基于褐煤水热废液的聚羧酸型水煤浆分散剂(ZZ).结果表明:褐煤水热有机废液具有含氧官能团,利用其合成的分散剂(ZZ)使东明褐煤及其水热提质煤成浆浓度分别达到53.08%、58.82%,比代表性商品分散剂(NX)提高0.94%~1.15%,比同系参照组(WX)的表观黏度降低66.2~81.2 mPa·s.基于褐煤水热废液制备聚羧酸水煤浆分散剂既可有效利用废液中的有机组分,也减少了废液排放.
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Key words
hydrothermal method,coal water mixture,lignite,hydrothermal waster water,polycarboxylate dispersant
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