基于不同方案比选的煤化工高盐废水处理技术  

Wastewater Treatment Technology for Coal Chemical Industry Based on Different Scheme Comparisons

作　　者：王二成 Wang Ercheng(Inner Mongolia Datang International Keshiketeng Coal to Natural Gas Co.,Ltd.,Chifeng Inner Mongolia 025350,China)

机构地区：[1]内蒙古大唐国际克什克腾煤制天然气有限责任公司,内蒙古赤峰025350

出　　处：《山西化工》2024年第7期232-234,共3页Shanxi Chemical Industry

摘　　要：煤化工废水处理面临着成本与环境影响的双重挑战,尤其对于高浓度氯化钠废水的处理极具挑战性。针对这一问题,研究采用了结合悬浮冷冻浓缩与低温溶析结晶的技术方案,旨在提高氯化钠的回收率。并系统性地探讨了冷冻温度、搅拌时间及NaCl初始浓度对NaCl回收效果的影响。实验结果显示:在-10℃的悬浮冷冻温度下,浓缩液浓度与冰晶纯度获得了最佳表现。在搅拌时间为60 min、NaCl浓度为25.0%的条件下,NaCl的回收率最高,可达38.68%。该方法为废水中无机盐类的再回收利用提供了新的途径,对煤化工废水处理技术的进步具有实际和理论上的推动作用。The treatment of coal chemical wastewater faces dual challenges of cost and environmental impact,especially for the treatment of high concentration sodium chloride wastewater.In response to this issue,a technical solution combining suspension freeze concentration and low-temperature dissolution crystallization was adopted in the study,aiming to improve the recovery rate of sodium chloride.This paper systematically explored the effects of freezing temperature,stirring time,and initial NaCl concentration on NaCl recovery efficiency.The experimental results showed that at a suspension freezing temperature of-10℃,the concentration of the concentrate and the purity of ice crystals achieved the best performance.Under the conditions of stirring time of 60 minutes and NaCl concentration of 25.0%,the recovery rate of NaCl is the highest,reaching 38.68%.This method provides a new approach for the recycling and utilization of inorganic salts in wastewater,and has practical and theoretical impetus for the advancement of coal chemical wastewater treatment technology.

关 键 词：煤化工废水 NaCl回收 悬浮冷冻浓缩 低温溶析结晶 资源再利用 

分 类 号：X784[环境科学与工程—环境工程]