电镀行业重金属在线回收清洁生产技术  

In situ recycling technology for heavy metals in electroplating industry clean production

作　　者：汪晴[1,2] 熊杰 叶锦韶[2] 

机构地区：[1]珠海市金湾区环境监测站,珠海519000 [2]暨南大学环境学院,广州510632

出　　处：《生态科学》2015年第4期163-168,195,共7页Ecological Science

摘　　要：为了提高电镀企业水重复利用率,降低物料单耗,减少重金属产生量,提升企业清洁生产水平,通过某电镀厂清洁生产实例,介绍了膜分离和离子交换在线回收技术的基本原理和技术特性,计算了经济可行性,对比了水重复利用率、物料单耗、重金属产生量三项指标。结果表明,该技术的内部收益率大于基准收益率,镀镍工序水重复利用率提高了60.1%,物料单耗降低了4.51%,废水中镍产生量每年减少360 kg,镀铬工序水重复利用率提高了46.0%,物料单耗降低了10.4%,废水中Cr(VI)产生量每年减少340 kg。In order to improve the reuse rate of water, reduce the consumption of materials, decrease the discharge of heavy metals, and enhance the level of clean production in electroplating enterprises, the feasibility of in situ recycling technology for heavy metals was discussed. The clean production of a plating factory was used as an example to introduce the basic principle and technical features of membrane separation and ion exchange in-situ recycling technology. The economic feasibility was calculated, and three indices such as the reuse rate of water, consumption of materials, and discharge of heavy metals were compared. The results indicated that the internal rate of return of this in-situ recycling technology was higher than benchmark yield. In Ni electroplating process, the reuse rate of water increased by 60.1%, the consumption of materials decreased by 4.51%, and the discharged value of Ni reduced 360 kg per year. Those in Cr electroplating process were 46.0%, 10.4%, and 340 kg per year, respectively.

关 键 词：电镀 清洁生产 重金属 在线回收 

分 类 号：X383[环境科学与工程—环境工程]