轻烧镁粉处理矿山酸性废水（AMD）的实验研究
发布时间：2018-11-26 08:42
【摘要】：我国拥有丰富的煤矿资源,可以用于生产轻烧镁粉。轻烧镁粉活性高效果好,目前其在环保领域的应用研究已经有很多,主要包括酸性废水的中和处理、重金属的脱除和烟气脱硫等,但是将其与其他药剂联合处理废水中的高浓度氯离子和硫酸根的相关研究并没有。所以这种开发性实验研究具有重要意义。本课题以轻烧镁粉为处理药剂,尝试着用轻烧镁粉替代氧化钙,联合偏铝酸钠,以实验室模拟废水和子长县煤矿的实际废水为处理对象,通过静态条件性实验和正交试验,探索其吸附规律,考察了各因素对废水中离子的去除率的影响;通过低温试验、二次试验、低药量处理,考察了实际应用条件来处理的效果;将实验结果与超高石灰铝法(氧化钙联合偏铝酸钠)进行对比试验,对应用轻烧镁粉联合偏铝酸钠做处理剂处理酸性废水的经济技术上的可行性进行了简要的分析。研究结果表明,应用轻烧镁粉替代氧化钙可行。通过条件性试验和正交试验发现,针对该矿区的实际废水的最佳实验条件为轻烧镁粉10g/L,偏铝酸钠3.3g/L,温度55℃,搅拌时间10min,pH值为9,在此条件下C1-去除率为78.6%,SO42-去除率为92.8%。应用轻烧镁粉联合偏铝酸钠处理实际废水有较好的处理效果和经济性都相对较好,而且轻烧镁粉应用方便、价廉物广,因此应用轻烧镁粉处理实际废水具有较好的环境和经济效益。但是在实际应用中,温度的条件、药品用量的经济性都是需要考虑的问题,所以分别尝试了低温试验、二次处理及低药量处理实验。实际应用中可以根据不同的去除需求,选择处理条件。
[Abstract]:Our country has abundant coal mine resources, can be used to produce light burning magnesium powder. The light burning magnesium powder has high activity and good effect. At present, there have been a lot of research on its application in the field of environmental protection, mainly including neutralization treatment of acid wastewater, removal of heavy metals and flue gas desulfurization, etc. However, there are no studies on the treatment of high concentrations of chloride and sulfate in wastewater with other chemicals. Therefore, this kind of developmental experimental research is of great significance. In this paper, the light burning magnesia powder is used as the treatment agent, the light burning magnesium powder is used instead of calcium oxide, the sodium metaluminate is combined with the laboratory simulated wastewater and the actual waste water of the coal mine in Zichang County as the treatment object, the static condition experiment and the orthogonal experiment are adopted. The effects of various factors on the removal rate of ions in wastewater were investigated. Through the low temperature test, the secondary test, the low dosage treatment, the actual application condition has been investigated to deal with the effect; The experimental results were compared with ultra-high lime aluminum method (calcium oxide combined with sodium metaluminate). The economic and technical feasibility of treating acid wastewater with light burned magnesium powder combined with sodium metaluminate was analyzed briefly. The results show that it is feasible to replace calcium oxide with light burned magnesia powder. Through the conditional test and orthogonal test, it is found that the optimum experimental conditions for the actual wastewater in this mine are: light burning magnesium powder 10 g / L, sodium metaluminate 3.3 g / L, temperature 55 鈩，
本文编号：2358010
[Abstract]:Our country has abundant coal mine resources, can be used to produce light burning magnesium powder. The light burning magnesium powder has high activity and good effect. At present, there have been a lot of research on its application in the field of environmental protection, mainly including neutralization treatment of acid wastewater, removal of heavy metals and flue gas desulfurization, etc. However, there are no studies on the treatment of high concentrations of chloride and sulfate in wastewater with other chemicals. Therefore, this kind of developmental experimental research is of great significance. In this paper, the light burning magnesia powder is used as the treatment agent, the light burning magnesium powder is used instead of calcium oxide, the sodium metaluminate is combined with the laboratory simulated wastewater and the actual waste water of the coal mine in Zichang County as the treatment object, the static condition experiment and the orthogonal experiment are adopted. The effects of various factors on the removal rate of ions in wastewater were investigated. Through the low temperature test, the secondary test, the low dosage treatment, the actual application condition has been investigated to deal with the effect; The experimental results were compared with ultra-high lime aluminum method (calcium oxide combined with sodium metaluminate). The economic and technical feasibility of treating acid wastewater with light burned magnesium powder combined with sodium metaluminate was analyzed briefly. The results show that it is feasible to replace calcium oxide with light burned magnesia powder. Through the conditional test and orthogonal test, it is found that the optimum experimental conditions for the actual wastewater in this mine are: light burning magnesium powder 10 g / L, sodium metaluminate 3.3 g / L, temperature 55 鈩，
本文编号：2358010
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