低温酸析法从G盐母液中回收R盐的资源化利用  

Resource utilization of recovery of R salt from G salt mother liquor by low-temperature acidulation precipitation

作　　者：杨聿航 常定明 曾连荪 彭彦 王沥东 黄光团[1] 蔡兰坤[1] 张乐华[1] 

机构地区：[1]华东理工大学资源与环境工程学院国家环境保护化工过程环境风险评价与控制重点实验室,上海200237 [2]湖北华巳新能源环保工程有限公司,荆州430062

出　　处：《环境工程学报》2016年第10期5677-5681,共5页Chinese Journal of Environmental Engineering

摘　　要：用低温酸析法处理G盐生产过程中产生的废母液,研究温度和pH条件对处理效果的影响。首先分别以R盐和G盐配制的模拟废水为研究对象,发现R盐酸析效果明显,其酸析效果随温度的降低而升高,随pH的升高而降低;而G盐没有出现酸析现象。然后,以实际G盐废母液为研究对象,在-12℃条件下冷冻12 h,其COD去除率为55%,其酸析出的固体主要成分为R盐;计算可得每升实际G盐废母液可以回收纯度为51%的R盐111.3 g。以每天处理10 m^3废水工程为例,该低温酸析工艺所需的电功率为8.41 k W,废水处理工程的静态投资回收期为0.48年。结果表明,通过低温酸析法对实际G盐废母液中R盐进行资源化回收是有效、可行的。The mother liquor from the G salt production process was treated by a low-temperature acidulation precipitation technology,while the influences of temperature and pH on the processes were studied. The simulated wastewater was prepared with R salt and G salt,respectively. The results showed that the acidulation precipitation of R salt increased with decreasing temperature,but decreased with increasing pH. However,the acidulation precipitation of G salt was negligible. When the actual G salt mother liquor was frozen for 12 hours at- 12 ℃,the removal rate of COD was 55%,and the main composition of the crystalline solid was R salt. According to the calculation,treating the real G salt mother liquor could recover 111. 3 g per liter solid,of which the purity of R salt was 51%. In a case study,treating wastewater of 10 m3·d-1,the energy consumption was8. 41 k W,and the static payback time of wastewater treatment engineering was 0. 48. As a result,it was found that low-temperature acidulation precipitation was effective and feasible for recovering R salt from the real G salt mother liquor.

关 键 词：低温酸析法 染料中间体 G盐废母液 R盐 

分 类 号：X703[环境科学与工程—环境工程]