摘要
煤矿分布式地下水库在神东地区应用取得显著成果,宁东地区已开始论证其可行性,但宁东地区矿井水多为高浊度高矿化度矿井水,需要对水库入水进行预处理。本文采用以粉煤灰为原料,通过与聚丙烯酰胺(PAM)、聚合氯化铝(PAC)、壳聚糖混合得到处理高浊度高矿化度矿井水的絮凝剂,试验对比了粉煤灰基复合絮凝剂和未加粉煤灰絮凝剂的絮凝效果,并探究了粉煤灰基絮凝剂的影响因素,确定了最佳投加量和试验条件。实验结果表明:(1)5个处理组中对矿井水的处理效果依次是:PAM+PAC+壳聚糖+粉煤灰>PAM+PAC+壳聚糖>PAM+PAC>PAM>PAC;(2)粉煤灰基复合絮凝剂的最佳絮凝条件为温度25℃、pH值7、搅拌强度220 r/min、搅拌时间20 min;(3)在最佳条件下,复合絮凝剂对矿化度、悬浮物、钙离子、总硬度和硫酸根的去除率分别为12.16%、98.04%、80.57%、77.86%和95.44%;(4)粉煤灰基复合絮凝剂作为地下水库处理高浊度高矿化度矿井水预处理絮凝剂是可行的。本研究为地下水库进水的絮凝等预处理提供理论依据和技术支撑。
Significant results have been achieved in the application of distributed underground water reservoirs in Shendong area.Ningdong area has begun to demonstrate its feasibility.However,the mine water in Ningdong area is mostly of high turbidity and high salinity,so the pre-treatment of the reservoir water is required.The experiment compares the flocculation effect of fly ash-based composite flocculant and unfilled coal ash flocculant,and explores the influence factors of fly ash-based flocculant,and determines the optimal dosage and test conditions.In view of the characteristics of high turbidity and high salinity mine water,this experiment,using fly ash as raw material,to obtain high turbidity and high ore by mixing it with polyacrylamide(PAM),polyaluminum chloride(PAC)and chitosan,gets flocculants for treating high turbidity and high salinity mine water.The experiment compares the flocculation effect of fly ash-based composite flocculant and unfilled coal ash flocculant,and explores the influencing factors of fly ash-based flocculant,and determines the optimal dosage and test conditions.The experimental results show that:1.The treatment effect of mine water in the five treatment groups is:PAM+PAC+chitosan+fly ash>PAM+PAC+chitosan>PAM+PAC>PAM>PAC;2.The optimum condition of fly ash composite flocculant in temperature is 25°C,pH 7,stirring strength 220 r/min,stirring time 20 min;3.Under the optimal conditions,the removal rates of salinity,suspended solids,calcium ions,total hardness and sulfate by composite flocculants are 12.16%,98.04%,80.57%,77.86%and 95.44%;4.It is feasible to use fly ash-based composite flocculant as pretreatment flocculant for the treatment of high salinity high suspended solid water in the groundwater reservoir.This article provides experimental theoretical basis and technical support for the pretreatment of flocculation in the groundwater reservoir.
作者
蒋斌斌
高昊
杜坤
宋振宇
赵茜阳
张凯
Jiang Binbin;Gao Hao;Du Kun;Song Zhenyu;Zhao Xiyang;Zhang Kai(School of Chemical&Environmental Engineering,China University of Mining&Technology-Beijing,Beijing 100083,China;State Key Laboratory of Water Resources Protection and Utilization in Utilization in Coal Mining,Beijing 100011,China)
出处
《矿业科学学报》
2020年第6期681-686,共6页
Journal of Mining Science and Technology
基金
水资源保护国家重点实验室开放基金(SHJT-17-42,SHJT-16-30.8)
中国矿业大学(北京)越崎青年学者(2019QN08)
国家重点研发计划(2018YFC0406404)
中央高校基本科研业务费专项资金(2018QH03)。
关键词
矿井水
絮凝
粉煤灰综合利用
高浊度
高矿化度
mine water
flocculation
comprehensive utilization of fly ash
high turbidity
high salinity
