电镀间歇式逆流清洗节水及自动控制研究  

Study of water saving and automatic control of batch countercurrent rinsing in electroplating production

作　　者：贺框 项赟[1] 杜建伟[1] 马英 HE Kuang XIANG Yun DU Jian-wei MA Ying(South China Institute of Environmental Sciences, Ministry of Environmental Protection of the People＇s Republic of China, Guangzhou 510655, China)

机构地区：[1]环境保护部华南环境科学研究所,广东广州510655 [2]广州华科环保工程有限公司,广东广州510655

出　　处：《电镀与涂饰》2016年第21期1136-1141,共6页Electroplating & Finishing

基　　金：国家科技重大专项项目(2014ZX07204-008)子课题:电镀废水中毒害污染物全过程控制技术研究与工程示范(2014ZX07204-008-002)

摘　　要：以一套电镀间歇式三级逆流清洗装置为对象,研究了影响镀件清洗效果的因素,检测了各级清洗槽中总镍浓度和电导率的变化。利用PLC自动控制系统实现清洗水的自动控制,当第二级清洗槽电导率达到上限(800μS/cm)时依次更换各级清洗水。该系统连续自动运行4个周期,一级槽排出的清洗水的电导率均超过6 000μS/cm,总镍浓度达到489 mg/L以上;末级清洗槽的电导率维持在100μS/cm以下,总镍浓度始终低于2.5 mg/L。该自动控制系统能够提高清洗水的利用效率,并保证镀件的清洗质量。A three-stage batch countercurrent rinsing equipment was selected to study the factors affecting the rinsing of articles. The variation of total nickel concentration and conductivity in each rinse tank was tested. A system for automatic control of rinsing water was developed with PLC program. The rinsing water in each rinse tank is to be replaced successively when the conductivity in the second-stage rinse tank reaches the upper limit i.e. 800 μS/cm. A four-cycle running result showed that the rinsing water discharged from the first-stage rinse tank has a conductivity higher than 6 000 μS/cm and its total nickel concentration exceeds 489 mg/L, while the conductivity and total nickel concentration of the rinsing water in the last rinse tank are below 100μS/cm and 2.5 mg/L, respectively. The automatic control system improves the utilization efficiency of rinsing water and ensures the cleaning quality of articles.

关 键 词：电镀 间歇式逆流清洗 镍 电导率 自动控制 

分 类 号：TQ150.6[化学工程—电化学工业] TQ153