碟式离心机应用于泥水分离的试验研究

发布时间：2019-07-10 13:28

【摘要】：近年来随着城市轨道交通的发展,泥水平衡盾构技术得到了广泛的应用。为了提高泥水的分离效率,增加水的循环使用率,减少废水排放,文章使用碟式离心机进行泥水分离试验,该种类型的离心机具有大量的碟片,可降低沉降高度、增大沉降面积。试验中首先进行清水和粘土、细砂的混合液分离试验,分析分离前后混合液的浊度、物料的去除率,然后通过配置盾构用泥浆并与粘土、细砂混合后进行分离,分析分离前后物料浊度、粒度并对添加盾构泥浆前后的混合液稳定性进行测定。研究结果表明:碟式离心机适用于泥水盾构的泥水处理,对粒径40~60μm的粒子去除效果良好;去除率均在90%以上且分离效果与分离时间呈正比;分离后物料的稳定性增强、浊度降低,中位径D50显著变小。研究成果为实现泥水高效分离提供了理论与实践基础。
文内图片：

图片说明：碟式离心机分离原理
[Abstract]:In recent years, with the development of urban rail transit, mud-water balance shield technology has been widely used. In order to improve the separation efficiency of mud and water, increase the utilization rate of water circulation and reduce the discharge of wastewater, this paper uses a disc centrifuge to carry out the mud and water separation test. This type of centrifuge has a large number of disks, which can reduce the settlement height and increase the settlement area. In the experiment, the mixing liquid separation test of clear water, clay and fine sand was carried out, and the turbidity of the mixture before and after separation was analyzed, and the turbidity and particle size of the mixture before and after the separation were measured by configuring the shield mud and mixing it with clay and fine sand, and then the stability of the mixture before and after the addition of shield mud was measured. The results show that the disc centrifuge is suitable for mud and water shield treatment, and the removal rate of particles with particle size of 40 ~ 60 渭 m is good, the removal rate is above 90% and the separation effect is proportional to the separation time. The stability of the material is enhanced, the turbidity is decreased, and the median diameter D50 is significantly reduced after separation. The research results provide a theoretical and practical basis for the efficient separation of mud and water.
【作者单位】：北京石油化工学院机械工程学院;北京化工大学机电学院;
【基金】：国家自然科学基金项目(51104022) 北京市高等学校青年拔尖人才培育计划项目(PXM2014_014222_000065)
【分类号】：U455.43

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