CCTEG Hangzhou Research Institute Co., Ltd.

煤矿矿井水处理及资源化利用是保护矿区生态环境与解决矿区缺水问题的有效途径。 针对正通煤业矿井水水量大、悬浮物含量高、矿化度高、含氟化物的特点,采用了以两级预沉-澄清为主体的矿井水净化处理工艺,并对该工艺的机械澄清单元进行了针对性的改良,使其实现悬浮物和氟化物的协同去除。 工程运行结果表明,矿井水在进水 SS 平均浓度为 3 342 mg·L-1,聚合氯化铝和聚丙烯酰胺投加量分别为 80 mg·L-1、0.8 mg·L-1的情况下,辐流预沉池、平流沉淀池和机械加速澄清池的 SS 平均去除率分别为 72.5%、48.3%、98.1%;进、出水氟化物分别为 1.26 mg·L-1、0.87 mg·L-1,去除率达 31.0%,出水指标优于设计标准,矿井水净化处理的运行成本 0.34 元/ 吨水。

Treatment and resource utilization of mine drainage is an effective way to protect the ecologi⁃cal environment and address the issue of water shortage in mining areas. According to the characteristicsof mine drainage of large water flow, high suspended solid, high salinity and containing fluoride, thepurification process of two-stage preprecipitation and clarification was adopted in Zhengtong coal mine,and the mechanical clarification unit was optimized to synergistically remove suspended solid and fluor⁃ide. The operation result showed that the average SS removal rates of radial flow sedimentation tank,horizontal flow sedimentation tank and mechanical accelerated clarifier were 72. 5%, 48. 3% and98.1%, respectively, under the conditions of the average concentration of influent SS was 3 342 mg·L-1and the dosages of PAC 80 mg·L-1 and PAM 0.8 mg·L-1. The influent and effluent concentrations offluoride were 1. 20 mg · L-1 and 0. 93 mg · L-1, respectively. The fluoride removal rate achieved31.0%. The effluent quality indexes were better than the design criteria. The operation cost of minedrainage treatment was 0.34 yuan·ton-1.

中国煤科面上项目基金(2018MS017)

高杰. 两级预沉-澄清工艺处理大型高悬浮物含氟矿井水———以正通煤业为例[J]. 能源环境保护, 2023,37(4): 165-170.

GAO Jie. Treatment of large-scale mine drainage with high suspended solid and fluoride by the process of two-stage preprecipitation and mechanical clarifier:A case study of Zhengtong coal mine[J]. Energy EnvironmentalProtection, 2023, 37(4): 165-170.