[1]杜宁,余太平,何延召,等.冶金工业含铬废水处理工艺优化及改造应用[J].中国给水排水,2020,36(17):90-94.
　DU Ning,YU Tai-ping,HE Yan-zhao,et al.Optimization and Application of Chromium Containing Wastewater Treatment Process in Metallurgy Industry[J].China Water & Wastewater,2020,36(17):90-94.
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冶金工业含铬废水处理工艺优化及改造应用

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第36卷 期数: 2020年第17期 页码: 90-94 栏目: 出版日期: 2020-09-01
Title:
Optimization and Application of Chromium Containing Wastewater Treatment Process in Metallurgy Industry
作者:
杜宁1，余太平2，何延召2，蔡洪2，李孟1
(1.武汉理工大学土木工程与建筑学院，湖北武汉430070；2.湖北省城建设计院股份有限公司，湖北武汉430051)
Author(s):
DU Ning1，YU Tai-ping2，HE Yan-zhao2，CAI Hong2，LI Meng1
(1. School of Civil Engineering and Architecture， Wuhan University of Technology， Wuhan 430070，China; 2. Hubei Urban Construction Design Institute Co. Ltd., Wuhan 430051， China)
关键词:
含铬废水; 还原沉淀; 升级改造
Keywords:
chromium containing wastewater; reductionprecipitation; upgrading and reconstruction
摘要:
针对中部地区某钢铁厂的还原沉淀处理工艺存在出水总铬浓度不能稳定达标、药剂投加量大、铬泥产量高等问题，对其处理工艺进行升级改造。在原有工艺的基础上，优化二级还原池的ORP值并作为自控加药系统指标，改善絮凝阶段的水力条件，增加活性砂过滤系统，同时采用NaOH/Ca(OH)2组合方式调节中和池的pH值。工艺优化后，Cr(Ⅵ)和总Cr出水浓度平均值分别为0.02、0.07 mg/L，可以稳定达到《钢铁企业排放标准》（GB 13456—2012）中表3的相应指标要求，同时减少了还原剂投加量，铬泥产量显著下降，运行成本明显降低。
Abstract:
In order to solve the problems of unstable total Cr concentration in the effluent, large dosage of agents and high production of chromium sludge in the reduction-precipitation process of a steel plant in the central region, the treatment process of the plant was thus upgraded and reconstructed. Based on the original process, ORP value of the secondary reduction tank was used as an indicator of a self-controlled agents system, hydraulic conditions of the flocculation stage were optimized, and combination of NaOH/Ca(OH)2 was used to adjust the pH value of the neutralization tank. After optimization of the process, average concentrations of Cr(Ⅵ) and total Cr in the effluent were 0.02 mg/L and 0.07 mg/L, respectively, which reached the standard of table 3 in Discharge Standard of Water Pollutants for Iron and Steel Industry (GB 13456-2012). Meanwhile, dosage of the reducing agents and chromium sludge yield were decreased, and the operational cost was significantly reduced.

相似文献/References:

[1]蒋涛,许青兰,李亚,等.拉链生产企业含重金属废水处理工程实例[J].中国给水排水,2018,34(20):101.
　JIANG Tao,XU Qing lan,LI Ya,et al.Practice of Heavy Metal Wastewater Treatment Project in a Zipper Manufactory[J].China Water & Wastewater,2018,34(17):101.
[2]张一博,李孟,杜宁,等.钢铁冷轧线含铬废水处理及同步资源化利用[J].中国给水排水,2022,38(2):110.
　ZHANG Yi-bo,LI Meng,DU Ning,et al.Treatment and Synchronous Utilization of Chromium?containing Wastewater in Steel Cold Rolling Production Line[J].China Water & Wastewater,2022,38(17):110.

更新日期/Last Update: 2020-09-01