高悬浮物高矿化度矿井水资源化关键技术应用研究

发布时间：2018-06-19 23:20

本文选题：矿井水 + 资源化　；参考：《河北工程大学》2015年硕士论文

【摘要】：对河北南部某集团矿区矿井水资源化利用现状进行了调研,针对高悬浮物高矿化度矿井水资源化关键技术进行了试验研究、方案设计及应用研究。河北南部地区矿井水总排放量37500 m3/d,矿区自用水量24950 m3/d,自用率67%,包括用于农田灌溉的20-25%的水量,矿井水总利用率达到90%以上。根据矿井水水质分析,主要有常规矿井水、高悬浮物矿井水、高矿化度矿井水和特殊污染矿井水四大类。针对悬浮物的去除全部采用澄清(混凝沉淀)+过滤工艺,处理率达到100%。总结高悬浮物矿井水资源化关键技术主要有:预沉调节作用,混凝剂的选择和水力条件(GT值)的优化,污泥回流作用。通过对五矿六矿高悬浮物矿井水的粒度分析和沉降性能试验表明,矿井水中悬浮物粒径在1-20μm之间,自由沉淀时间大于1h,悬浮物去除率可达80%。可利用预沉调节池去除易沉降的悬浮物,为后续工艺减轻负荷。五矿矿井水水质变化大,在处理过程中需要根据水质情况更换不同的药剂,才能达到排放标准。针对五矿三种水质的混凝试验得出最佳药剂组合和投药量为:PAC(80mg/L)+NPAM(0.4mg/L),PAC(80mg/L)+CPAM(0.4mg/L),PAC(80mg/L)+200目磁粉(100mg/L)。将试验结果应用于工程后,澄清池澄清效果良好,滤池反冲洗周期恢复正常。六矿矿井水的混凝试验表明,最佳的药剂组合和投药量为PAC(80mg/L)+NPAM(1mg/L)+200目磁粉(100mg/L)。试验结果应用于工程后,系统运行正常,处理效果好。总结高矿化度矿井水资源化关键技术主要有:强化预处理,反渗透除盐工艺优化设计,膜污染控制。针对五矿高矿化度矿井水,通过方案比较,采用超滤—反渗透工艺,估算总投资390万元,制水成本为2.01元/m3,年收益可达98.3万元。针对六矿反渗透系统的膜污染,采用先碱洗后酸洗再杀菌的清洗方法,清洗液为:碱溶液0.2%NaOH,酸溶液0.2%HCl,杀菌剂1%甲醛。清洗后RO出水各项指标基本上恢复到了初始状态,系统能够稳定运行,产水水量和除盐率接近设计值,达到了预期的效果。
[Abstract]:The present situation of mine water resource utilization in a certain mining area in southern Hebei province is investigated. The key technology of water resources utilization in high suspended solids and high salinity mine is studied experimentally, scheme design and application research are carried out. The total discharge of mine water in southern Hebei province is 37500 m3 / d, and the self-water consumption in mining area is 24950 m3 / d. The self-use rate is 67%, including 20-25% of the water used for irrigation of farmland, and the total utilization ratio of mine water is over 90%. According to the analysis of mine water quality, there are four kinds of mine water: conventional mine water, high suspended substance mine water, high salinity mine water and special polluted mine water. For the removal of suspended matter, clarification (coagulation and sedimentation) filtration process is adopted, and the treatment rate reaches 100%. The key technologies of water resources in high suspended mine are summarized as follows: the regulation of pre-settling, the selection of coagulants and the optimization of hydraulic conditions (GT), and the reflux of sludge. The particle size analysis and settling performance test of mine water with high suspended matter in No. 6 mine show that the particle size of suspended matter in mine water is between 1-20 渭 m, the free settling time is more than 1 h, and the removal rate of suspended matter can reach 80%. The pre-settling regulating tank can be used to remove the easy settling suspended matter, which can reduce the load for the subsequent process. The water quality of Minmetals mine water varies greatly, so it is necessary to change different chemicals according to the water quality in order to meet the discharge standard. According to the coagulation test of three kinds of water quality of Minmetals, the best combination and dosage is: 80 mg / L) NPAMN 0.4 mg / L) CPAM 0.4 mg / L) PAC80 mg / L) 200 mesh magnetic powder 100 mg 路L ~ (-1). After applying the test results to the project, the clarification effect of the clarifier is good, and the backwashing cycle of the filter returns to normal. The coagulation test of mine water in No. 6 Mine shows that the best combination of chemicals and dosage is PAC80 mg / L) NPAM 1 mg / L) 200 mesh magnetic powder 100 mg / L ~ (-1) ~ (-1) 路L ~ (-1) ~ (-1) 路L ~ (-1) 路L ~ (-1). The test results show that the system runs normally and the processing effect is good. The key technologies of high salinity mine water resources are summarized as follows: strengthening pretreatment optimizing design of reverse osmosis desalination process and membrane fouling control. In view of the mine water with high salinity in Minmetals, the total investment is estimated to be 3.9 million yuan, the cost of water production is 2.01 yuan / m ~ (3), and the annual income can reach 983000 yuan by comparing the schemes and adopting ultrafiltration and reverse osmosis process. In view of membrane fouling of reverse osmosis system in No. 6 mine, the cleaning method of alkali washing, acid washing and sterilizing was adopted. The cleaning solution was: alkali solution 0.2 NaOH, acid solution 0.2 HCl, fungicide 1% formaldehyde. After cleaning, each index of RO effluent is basically restored to the initial state, the system can operate stably, the water yield and desalination rate are close to the design value, and the expected effect is achieved.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X751

【参考文献】