【摘要】 以阳离子聚电解质为絮凝剂和硫酸铝为凝聚剂组成的复合絮凝剂，可以彻底破坏废弃钻井液的胶体体系，并使其固液分离。研究了阳离子聚电解质对废弃钻井液中悬浮颗粒表面电荷的中和作用以及对固相颗粒的絮凝方式。结果表明，大分子量的阳离子聚电解质的絮凝效果好于小分子量的絮凝效果；絮凝剂与凝聚剂加量的同步增加，可以加速固液分离，但不可过量，否则影响絮凝效率。更多还原

【Abstract】 The compound flocculant consisted of cationic polyelectrolyte as a flocculant and aluminum sulfate salt as a coagulant can thoroughly break down the colloid system of the waste drilling liquid and make the waste mud solid liquid separated. The surface charge neutralization of suspended particles and the flocculation mode of solid particles in waste drilling liquid caused by cationic polyelectrolyte were studied experimentally.The result showed that cationic polyelectrolyte with a great molecular weight had better flocculability than that with a small molecular weight.Addition of flocculant and coagulant should be proper.更多还原