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煤絮凝一般通过加入工业上现有的聚合絮凝剂来完成,近来的实验表明,也可以使用从微生物中取得的生物聚合物。生物聚合物能有效地絮凝煤,并使煤更加疏水,可利用疏水性的增加分离煤絮团,也可用来降低絮凝煤的含水量。在这方面,利用生物聚合物和合成絮凝剂对粉煤进行了絮凝试验和沉降试验。对实验结果作了讨论,并对随时间而变化的粉煤沉降提出一种迁移模型。
Coal flocculation is generally accomplished by adding commercially available polymeric flocculants, and recent experiments have shown that biopolymers derived from microorganisms can also be used. Biopolymers can effectively flocculate coal and make the coal more hydrophobic. The hydrophobicity can be used to separate the coal flocs, and the flocculated coal can also be used to reduce the water content. In this respect, flocculation tests and sedimentation tests were conducted on pulverized coal using biopolymers and synthetic flocculants. The experimental results are discussed, and a migration model is proposed for settling of pulverized coal that varies with time.