热处理—电镀车间冲洗工艺改进及废水综合处理  

Flushing process improvement in heat treatment and electroplating workshop and waste water comprehensive treatment

作　　者：徐卫平[1] 徐红 董东[1,2] 黄炎[1] 

机构地区：[1]江苏法尔胜股份有限公司,江苏江阴214433 [2]法尔胜集团公司,江苏江阴214433

出　　处：《金属制品》2009年第6期59-61,65,共4页Metal Products

摘　　要：热处理—电镀生产过程中原有冲洗工艺是采用连续多道次的自来水对钢丝直接冲洗,将冲洗水进行沉淀及中和处理后由排水管网直接排放,消耗大量水资源的同时也对环境造成污染。采用多级冲洗新工艺,即沿着钢丝行走的方向,冲洗槽液面由低到高,逐道清洗。对废水进行综合处理,经过调节池、中和反应器、固液分离池、污泥浓缩池等处理后,废酸水的pH为7～9,ρ(COD)为60 mg/L,ρ(Fe)为1 mg/L,ρ(Zn)小于1 mg/L,ρ(SS)为20 mg/L,各种指标都达到《污水综合排放标准》(GB 8978—1996)一级标准。冲洗工艺的改进及废水综合处理,使自来水消耗和废酸水排放大大减少,每年可节约生产成本36.67万元。The original flushing process in heat treatment and eleetroplating production process is direct flushing on steel wire by adopting continuous water many times. The direct discharge of flushing water through drainage pipeline network af- ter treatment of sedimentation and neutralization consumed large water and polluted environment at the same time. To adopt multi-stage flushing new process, along the steel wire running direction, flushing tank liquid level from low to high, washing each pass, to do comprehensive treatment on waste water, ＇after process treatment of adjusting tank, neutralization reactor, solid-liquid separation tank and sludge concentration tank, pH value of waste acid water was from 7 to 9, ρ（COD） was 60 mg/L,ρ（Fe） was 1 mg/L,ρ（Zn） was less than 1 mg/L,ρ（SS） was 20 mg/L, the various index of water quality reached GB 8978--1996 waste water comprehensive discharge standard first class standard. The improvement of flushing process and waste water comprehensive treatment decreased water consumption and waste acid water discharge greatly, which can save production cost 366.7 thousand yuan annually.

关 键 词：酸洗废酸水 冲洗槽 调节池 中和反应器 固液分离池 污泥浓缩池 

分 类 号：X703.1[环境科学与工程—环境工程]