矿井水净化后的煤泥水减量化研究与应用  

Study and application of coal slime water reduction after mine water purification

作　　者：高杰 王健 GAO Jie;WANG Jian(Hangzhou Research Institute of China Coal Technology&Engineering Group,Hangzhou 311201,China;Shaanxi Zhengtong Coal Co.,Ltd.,Zikuang Mining Group,Xianyang 713600,China)

机构地区：[1]中煤科工集团杭州研究院有限公司,浙江杭州311201 [2]淄矿集团陕西正通煤业有限责任公司,陕西咸阳713600

出　　处：《能源环境保护》2021年第5期68-74,共7页Energy Environmental Protection

摘　　要：为实现煤泥水减量化,分析了初沉池、调节池和澄清池的煤泥粒径,研究了微滤目数、C-PAM添加量和压滤时间对煤泥脱水的影响。结果表明:初沉池、调节池和澄清池中颗粒物的平均粒径分别为145.1μm、103.2μm和91.9μm,初沉池和调节池中存在大于830μm的颗粒物,最大粒径超过1200μm;三池中,粒径小于45μm的颗粒物超过20%;20目微滤可有效去除830μm以上的颗粒物,投加15 mg/L C-PAM进行絮凝可有效去除45μm以下的颗粒物,二者共同作用可提升泥饼含固率。在进水悬浮物不超过3000 mg/L的条件下,煤泥水进入隔膜压滤机压滤的时间不应低于40 min;当进水悬浮物超过5000 mg/L时,压滤时间不应低于30 min。煤泥水经微滤+机械浓缩+隔膜压滤工艺处理后,泥饼含固率大于70%,煤泥水减排量超过90%。In order to reduce the amount of slime water,the particle size of slime in the primary settling tank,regulating tank and clarifier were analyzed,and the effects of microfiltration mesh,C-PAM addition and pressure filtration time on coal slime water dehydration were studied.The results showed that the average particle sizes of slime in the primary settling tank,regulating tank and clarifier were 145.1μm,103.2μm and 91.9μm,respectively.There were particles larger than 830μm in the primary sedimentation tank and regulating tank.The maximum particle size was larger than 1200μm.More than 20%of the particles in the three tanks had a particle size less than 45μm.The 20 mesh microfiltration and 15 mg/L C-PAM could effectively remove the particulate greater than 830μm and less than 45μm,respectively.The two methods together could improve the solid content of mud cake.When the influent suspended solids were less than 3000 mg/L,the pressure filtration time of slime water in the high-efficiency rapid diaphragm filter press should be more than 40 min.When the influent suspended solids exceeded 5000 mg/L,the pressure filtration time should be more than 30 min.After treated by the process of microfiltration+mechanical concentration+diaphragm pressure filtration,the solid content of slime cake was more than 70%,and the emission reduction of slime water reached more than 90%.

关 键 词：煤泥水 减量化 颗粒物 压滤 含固率 

分 类 号：X703[环境科学与工程—环境工程]