旋液分离器对泥浆的颗粒分离效率和脱水能力  

Research on Particle Separation Efficiency and Dehydration Capability of Hydrocyclone for Slurry Separation

作　　者：刘恒 LIU Heng(Tengda Construction Group Co.Ltd.,Shanghai 201204,China)

机构地区：[1]腾达建设集团股份有限公司,上海201204

出　　处：《科技和产业》2024年第4期199-209,共11页Science Technology and Industry

基　　金：浙江省市县级科技计划项目(2022G00036)。

摘　　要：旋液分离器在泥浆处理领域应用广泛,具有颗粒分级和脱水浓缩的功能,底流颗粒粒径大、浓度高,溢流反之,两者粒径的理论界限称为分离粒径(d_(C)),实际运转时溢流和底流的颗粒分流会非线性地偏离分离粒径,因此实际粒级效率和脱水率的测试和控制对泥浆处理至关重要。依托泥水盾构工程的泥浆处理系统,使用激光粒度分布测试旋流进浆、底流和溢流粒度组成,结合筛析推演计算全段及各粒级效率,并对比宏观测试计算分离效率,分析旋流正常运转时的泥、水和泥浆的分流关系并提出判别方法。结果表明,该测试计算和判定方法在量程范围内快速有效,颗粒分离偏离分离粒径明显;设备参数不变时,平均效率与脱水率间负相关,且不受颗粒性质和测试方法影响,底部扩口等设备调整可实现两者同时增大。The hydrocyclone separator is widely used in the field of slurry treatment,with the functions of particle classification and dehydration.The underflow particle size is large and the concentration is high,and the overflow is on the contrary.The theoretical boundary between the particle sizes is defined as the separation particle diameter(d_C).In engineering practice,the particle separation of overflow and underflow deviates from d_(C) nonlinearly.Therefore,the measurement and control of actual grade efficiency and dehydration rate are crucial for slurry treatment.In order to deduce the efficiency of overall and single grades with the combination of sieve analysis,based on the slurry treatment system of a slurry shield project,the laser particle size distribution was used to measure the size composition of feed flow,underflow and overflow of hydrocyclone separators.The results were compared with the separation efficiency calculated by macro test.Besides,the distributary relationship among particles,water and slurry in the normal operation of separators was analyzed,of which the determination method was proposed.The results show that the method with laser particle sizer is fast and effective within the range of the sizer,and the particle separation deviated from d_(C) significantly.With the constant parameters of separator,the overall efficiency and dehydration rate are negatively correlated,which are not affected by particle properties and test methods.The adjustment of equipment,such as the underflow outlet enlargement,can increase both simultaneously.

关 键 词：旋液分离器 粒级效率 脱水率 激光粒度分布测试 

分 类 号：TQ051.8[化学工程]