摘要
为研究煤矿全生命周期内矿井水的混凝特性,以淮河能源集团煤矿矿井水为研究对象,分别选取PAC投加量、PAM投加量、PAC与PAM投加间隔时间、絮凝速度梯度、絮凝反应时间等影响因素开展混凝试验.结果表明:煤矿不同生命周期矿井水的PAC单位剂量脱浊率分别为2.14、4.52、33.04 NTU/(mg·L),矿井水的混凝性能随煤矿生命周期延伸逐渐增强;煤矿生产初期各因素极差分别为351、43.9、58.1、66.2、40.6、中期为 24.5、19、6.9、5.6、6.1,末期为 4.6、1.4、1.6、1.4、3.6,在煤矿全生命周期中,PAC投加量对混凝效果的影响在各因素中占主导地位,初期、中期及末期矿井水混凝效果的次影响因素分别为絮凝速度梯度,PAM投加量及絮凝反应时间.
Abstract
This paper is aimed at exploring the coagulation characteristics behind mine water in the whole lifecycle of coal mine.By employing the coal mine water in HuaiHe Energy Group as the research object,the study conducts an coagulation experiment on influencing factors including PAC dosage,PAM dosage,dosing interval between PAC and PAM,flocculating velocity gradient,flocculating reaction time.The results demonstrate that the turbidity removal rates per unit dose of PAC of mine water in different lifecycle stages are 2.14,4.52 and 33.04 NTU/(mg·L),respectively,indicating a gradual enhance-ment in the coagulation performance of mine water as the lifecycle of the coal mine extends.The range of each factor in the initial stage of coal mine production are 351,43.9,58.1,66.2,40.6,the middle stage are 24.5,19,6.9,5.6,6.1,and the late stage are 4.6,1.4,1.6,1.4,3.6,respectively.Throughout the lifecycle of coal mine,the influence of PAC dosage on coagulation effect is dominant a-mong all factors,while the secondary influence factors are flocculation velocity gradient in the initial stage,PAM dosage in the mid-production stage,and flocculation reaction time in late stage.
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